make go.sum authoritative

Pulls in support for XDS v3

.gitignore

@@ -0,0 +1,3 @@
+dist/
+.idea/
+VERSION

.goreleaser.yml

@@ -0,0 +1,30 @@
+builds:
+  - binary: grpcurl
+    main: ./cmd/grpcurl
+    goos:
+      - linux
+      - darwin
+      - windows
+    goarch:
+      - amd64
+      - 386
+      - arm64
+    ignore:
+      - goos: darwin
+        goarch: 386
+      - goos: windows
+        goarch: arm64
+    ldflags:
+      - -s -w -X main.version=v{{.Version}}
+
+archives:
+  - format: tar.gz
+    format_overrides:
+      - goos: windows
+        format: zip
+    replacements:
+      amd64: x86_64
+      386: x86_32
+      darwin: osx
+    files:
+      - LICENSE

.travis.yml

@@ -3,16 +3,20 @@ sudo: false
 
 matrix:
   include:
-    - go: "1.7"
-    - go: "1.8"
-    - go: "1.9"
-    - go: "1.10"
-      env: VET=1
-    - go: "1.11"
+    - go: 1.11.x
+      env: GO111MODULE=on
+    - go: 1.12.x
       env: GO111MODULE=off
-    - go: "1.11"
+    - go: 1.12.x
+      env: GO111MODULE=on
+    - go: 1.13.x
+      env:
+      - GO111MODULE=on
+      - VET=1
+    - go: 1.14.x
       env: GO111MODULE=on
     - go: tip
+      env: GO111MODULE=on
 
 script:
-  - if [[ "$VET" = 1 ]]; then make; else make deps test; fi
+  - if [[ "$VET" = 1 ]]; then make ci; else make deps test; fi

Dockerfile

@@ -0,0 +1,29 @@
+FROM golang:1.13-alpine as builder
+MAINTAINER FullStory Engineering
+
+# create non-privileged group and user
+RUN addgroup -S grpcurl && adduser -S grpcurl -G grpcurl
+
+WORKDIR /tmp/fullstorydev/grpcurl
+# copy just the files/sources we need to build grpcurl
+COPY VERSION *.go go.* /tmp/fullstorydev/grpcurl/
+COPY cmd /tmp/fullstorydev/grpcurl/cmd
+# and build a completely static binary (so we can use
+# scratch as basis for the final image)
+ENV CGO_ENABLED=0
+ENV GOOS=linux
+ENV GOARCH=amd64
+ENV GO111MODULE=on
+RUN go build -o /grpcurl \
+    -ldflags "-w -extldflags \"-static\" -X \"main.version=$(cat VERSION)\"" \
+    ./cmd/grpcurl
+
+# New FROM so we have a nice'n'tiny image
+FROM scratch
+WORKDIR /
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
+COPY --from=builder /etc/passwd /etc/passwd
+COPY --from=builder /grpcurl /bin/grpcurl
+USER grpcurl
+
+ENTRYPOINT ["/bin/grpcurl"]

Makefile

@@ -1,10 +1,12 @@
+dev_build_version=$(shell git describe --tags --always --dirty)
+
 # TODO: run golint and errcheck, but only to catch *new* violations and
 # decide whether to change code or not (e.g. we need to be able to whitelist
 # violations already in the code). They can be useful to catch errors, but
 # they are just too noisy to be a requirement for a CI -- we don't even *want*
 # to fix some of the things they consider to be violations.
 .PHONY: ci
-ci: deps checkgofmt vet staticcheck unused ineffassign predeclared test
+ci: deps checkgofmt vet staticcheck ineffassign predeclared test
 
 .PHONY: deps
 deps:
@@ -16,7 +18,18 @@ updatedeps:
 
 .PHONY: install
 install:
-	go install ./...
+	go install -ldflags '-X "main.version=dev build $(dev_build_version)"' ./...
+
+.PHONY: release
+release:
+	@GO111MODULE=on go install github.com/goreleaser/goreleaser
+	goreleaser --rm-dist
+
+.PHONY: docker
+docker:
+	@echo $(dev_build_version) > VERSION
+	docker build -t fullstorydev/grpcurl:$(dev_build_version) .
+	@rm VERSION
 
 .PHONY: checkgofmt
 checkgofmt:
@@ -29,36 +42,33 @@ checkgofmt:
 vet:
 	go vet ./...
 
+# This all works fine with Go modules, but without modules,
+# CI is just getting latest master for dependencies like grpc.
 .PHONY: staticcheck
 staticcheck:
-	@go get honnef.co/go/tools/cmd/staticcheck
+	@GO111MODULE=on go install honnef.co/go/tools/cmd/staticcheck
 	staticcheck ./...
 
-.PHONY: unused
-unused:
-	@go get honnef.co/go/tools/cmd/unused
-	unused ./...
-
 .PHONY: ineffassign
 ineffassign:
-	@go get github.com/gordonklaus/ineffassign
+	@GO111MODULE=on go install github.com/gordonklaus/ineffassign
 	ineffassign .
 
 .PHONY: predeclared
 predeclared:
-	@go get github.com/nishanths/predeclared
+	@GO111MODULE=on go install github.com/nishanths/predeclared
 	predeclared .
 
 # Intentionally omitted from CI, but target here for ad-hoc reports.
 .PHONY: golint
 golint:
-	@go get github.com/golang/lint/golint
+	@GO111MODULE=on go install golang.org/x/lint/golint
 	golint -min_confidence 0.9 -set_exit_status ./...
 
 # Intentionally omitted from CI, but target here for ad-hoc reports.
-.PHONY: errchack
+.PHONY: errcheck
 errcheck:
-	@go get github.com/kisielk/errcheck
+	@GO111MODULE=on go install github.com/kisielk/errcheck
 	errcheck ./...
 
 .PHONY: test

README.md

@@ -1,5 +1,5 @@
 # gRPCurl
-[![Build Status](https://travis-ci.org/fullstorydev/grpcurl.svg?branch=master)](https://travis-ci.org/fullstorydev/grpcurl/branches)
+[![Build Status](https://travis-ci.com/fullstorydev/grpcurl.svg?branch=master)](https://travis-ci.com/github/fullstorydev/grpcurl/branches)
 [![Go Report Card](https://goreportcard.com/badge/github.com/fullstorydev/grpcurl)](https://goreportcard.com/report/github.com/fullstorydev/grpcurl)
 
 `grpcurl` is a command-line tool that lets you interact with gRPC servers. It's
@@ -14,39 +14,50 @@ This program accepts messages using JSON encoding, which is much more friendly f
 humans and scripts.
 
 With this tool you can also browse the schema for gRPC services, either by querying
-a server that supports [service reflection](https://github.com/grpc/grpc/blob/master/src/proto/grpc/reflection/v1alpha/reflection.proto),
-by reading proto source files, or by loading in compiled "protoset" files (files that contain encoded file
-[descriptor protos](https://github.com/google/protobuf/blob/master/src/google/protobuf/descriptor.proto)).
+a server that supports [server reflection](https://github.com/grpc/grpc/blob/master/src/proto/grpc/reflection/v1alpha/reflection.proto),
+by reading proto source files, or by loading in compiled "protoset" files (files that contain
+encoded file [descriptor protos](https://github.com/google/protobuf/blob/master/src/google/protobuf/descriptor.proto)).
 In fact, the way the tool transforms JSON request data into a binary encoded protobuf
 is using that very same schema. So, if the server you interact with does not support
 reflection, you will either need the proto source files that define the service or need
 protoset files that `grpcurl` can use.
 
-[Examples for how to set up server reflection can be found here.](https://github.com/grpc/grpc/blob/master/doc/server-reflection.md#known-implementations)
-
 This repo also provides a library package, `github.com/fullstorydev/grpcurl`, that has
 functions for simplifying the construction of other command-line tools that dynamically
 invoke gRPC endpoints. This code is a great example of how to use the various packages of
 the [protoreflect](https://godoc.org/github.com/jhump/protoreflect) library, and shows
 off what they can do.
 
+See also the [`grpcurl` talk at GopherCon 2018](https://www.youtube.com/watch?v=dDr-8kbMnaw).
+
 ## Features
 `grpcurl` supports all kinds of RPC methods, including streaming methods. You can even
 operate bi-directional streaming methods interactively by running `grpcurl` from an
 interactive terminal and using stdin as the request body!
 
-`grpcurl` supports both plain-text and TLS servers and has numerous options for TLS
-configuration. It also supports mutual TLS, where the client is required to present a
-client certificate.
+`grpcurl` supports both secure/TLS servers _and_ plain-text servers (i.e. no TLS) and has
+numerous options for TLS configuration. It also supports mutual TLS, where the client is
+required to present a client certificate.
 
 As mentioned above, `grpcurl` works seamlessly if the server supports the reflection
 service. If not, you can supply the `.proto` source files or you can supply protoset
 files (containing compiled descriptors, produced by `protoc`) to `grpcurl`.
 
 ## Installation
+
+### Binaries
+
+Download the binary from the [releases](https://github.com/fullstorydev/grpcurl/releases) page.
+
+On macOS, `grpcurl` is available via Homebrew:
+```shell
+brew install grpcurl
+```
+
+### From Source
 You can use the `go` tool to install `grpcurl`:
 ```shell
-go get github.com/fullstorydev/grpcurl
+go get github.com/fullstorydev/grpcurl/...
 go install github.com/fullstorydev/grpcurl/cmd/grpcurl
 ```
 
@@ -59,7 +70,11 @@ If you have already pulled down this repo to a location that is not in your
 run `make install`.
 
 If you encounter compile errors, you could have out-dated versions of `grpcurl`'s
-dependencies. You can update the dependencies by running `make updatedeps`.
+dependencies. You can update the dependencies by running `make updatedeps`. You can
+also use [`vgo`](https://github.com/golang/vgo) to install, which will use the right
+versions of dependencies. Or, if you are using Go 1.11, you can add `GO111MODULE=on`
+as a prefix to the commands above, which will also build using the right versions of
+dependencies (vs. whatever you may already in your `GOPATH`).
 
 ## Usage
 The usage doc for the tool explains the numerous options:
@@ -72,10 +87,13 @@ In the sections below, you will find numerous examples demonstrating how to use
 
 ### Invoking RPCs
 Invoking an RPC on a trusted server (e.g. TLS without self-signed key or custom CA)
-that requires no client certs and supports service reflection is the simplest thing to
+that requires no client certs and supports server reflection is the simplest thing to
 do with `grpcurl`. This minimal invocation sends an empty request body:
 ```shell
 grpcurl grpc.server.com:443 my.custom.server.Service/Method
+
+# no TLS
+grpcurl -plaintext grpc.server.com:80 my.custom.server.Service/Method
 ```
 
 To send a non-empty request, use the `-d` argument. Note that all arguments must come
@@ -92,7 +110,7 @@ If you want to include `grpcurl` in a command pipeline, such as when using `jq`
 create a request body, you can use `-d @`, which tells `grpcurl` to read the actual
 request body from stdin:
 ```shell
-grpcurl -d @ grpc.server.com:443 my.custom.server.Service/Method <<<EOM
+grpcurl -d @ grpc.server.com:443 my.custom.server.Service/Method <<EOM
 {
   "id": 1234,
   "tags": [
@@ -125,8 +143,10 @@ grpcurl localhost:8787 list my.custom.server.Service
 
 ### Describing Elements
 The "describe" verb will print the type of any symbol that the server knows about
-or that is found in a given protoset file and also print the full descriptor for the
-symbol, in JSON.
+or that is found in a given protoset file. It also prints a description of that
+symbol, in the form of snippets of proto source. It won't necessarily be the
+original source that defined the element, but it will be equivalent.
+
 ```shell
 # Server supports reflection
 grpcurl localhost:8787 describe my.custom.server.Service.MethodOne
@@ -138,7 +158,24 @@ grpcurl -protoset my-protos.bin describe my.custom.server.Service.MethodOne
 grpcurl -import-path ../protos -proto my-stuff.proto describe my.custom.server.Service.MethodOne
 ```
 
-## Proto Source Files
+## Descriptor Sources
+The `grpcurl` tool can operate on a variety of sources for descriptors. The descriptors
+are required, in order for `grpcurl` to understand the RPC schema, translate inputs
+into the protobuf binary format as well as translate responses from the binary format
+into text. The sections below document the supported sources and what command-line flags
+are needed to use them.
+
+### Server Reflection
+
+Without any additional command-line flags, `grpcurl` will try to use [server reflection](https://github.com/grpc/grpc/blob/master/src/proto/grpc/reflection/v1alpha/reflection.proto).
+
+Examples for how to set up server reflection can be found [here](https://github.com/grpc/grpc/blob/master/doc/server-reflection.md#known-implementations).
+
+When using reflection, the server address (host:port or path to Unix socket) is required
+even for "list" and "describe" operations, so that `grpcurl` can connect to the server
+and ask it for its descriptors.
+
+### Proto Source Files
 To use `grpcurl` on servers that do not support reflection, you can use `.proto` source
 files.
 
@@ -151,14 +188,18 @@ location of the standard protos included with `protoc` (which contain various "w
 types" with a package definition of `google.protobuf`). These files are "known" by `grpcurl`
 as a snapshot of their descriptors is built into the `grpcurl` binary.
 
-## Protoset Files
+When using proto sources, you can omit the server address (host:port or path to Unix socket)
+when using the "list" and "describe" operations since they only need to consult the proto
+source files.
+
+### Protoset Files
 You can also use compiled protoset files with `grpcurl`. If you are scripting `grpcurl` and
 need to re-use the same proto sources for many invocations, you will see better performance
 by using protoset files (since it skips the parsing and compilation steps with each
 invocation).
 
 Protoset files contain binary encoded `google.protobuf.FileDescriptorSet` protos. To create
-a protoset file, invoke `protoc` with the `*.proto` files that describe the service:
+a protoset file, invoke `protoc` with the `*.proto` files that define the service:
 ```shell
 protoc --proto_path=. \
     --descriptor_set_out=myservice.protoset \
@@ -169,3 +210,8 @@ protoc --proto_path=. \
 The `--descriptor_set_out` argument is what tells `protoc` to produce a protoset,
 and the `--include_imports` argument is necessary for the protoset to contain
 everything that `grpcurl` needs to process and understand the schema.
+
+When using protosets, you can omit the server address (host:port or path to Unix socket)
+when using the "list" and "describe" operations since they only need to consult the
+protoset files.
+

cmd/grpcurl/go1_10.go

@@ -0,0 +1,9 @@
+// +build go1.10
+
+package main
+
+func indent() string {
+	// In Go 1.10 and up, the flag package automatically
+	// adds the right indentation.
+	return ""
+}

cmd/grpcurl/go1_9.go

@@ -0,0 +1,9 @@
+// +build !go1.10
+
+package main
+
+func indent() string {
+	// In Go 1.9 and older, we need to add indentation
+	// after newlines in the flag doc strings.
+	return "    \t"
+}

cmd/grpcurl/grpcurl.go

@@ -1,24 +1,21 @@
-// Command grpcurl makes GRPC requests (a la cURL, but HTTP/2). It can use a supplied descriptor file or
-// service reflection to translate JSON request data into the appropriate protobuf request data and vice
-// versa for presenting the response contents.
+// Command grpcurl makes gRPC requests (a la cURL, but HTTP/2). It can use a supplied descriptor
+// file, protobuf sources, or service reflection to translate JSON or text request data into the
+// appropriate protobuf messages and vice versa for presenting the response contents.
 package main
 
 import (
-	"encoding/json"
+	"context"
 	"flag"
 	"fmt"
+	"io"
 	"os"
+	"path/filepath"
 	"strconv"
 	"strings"
 	"time"
 
-	"github.com/golang/protobuf/jsonpb"
-	"github.com/golang/protobuf/proto"
-	descpb "github.com/golang/protobuf/protoc-gen-go/descriptor"
 	"github.com/jhump/protoreflect/desc"
-	"github.com/jhump/protoreflect/dynamic"
 	"github.com/jhump/protoreflect/grpcreflect"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/credentials"
@@ -26,106 +23,183 @@ import (
 	"google.golang.org/grpc/metadata"
 	reflectpb "google.golang.org/grpc/reflection/grpc_reflection_v1alpha"
 	"google.golang.org/grpc/status"
+	"google.golang.org/protobuf/types/descriptorpb"
+
+	// Register gzip compressor so compressed responses will work
+	_ "google.golang.org/grpc/encoding/gzip"
+	// Register xds so xds and xds-experimental resolver schemes work
+	_ "google.golang.org/grpc/xds"
 
 	"github.com/fullstorydev/grpcurl"
 )
 
+// To avoid confusion between program error codes and the gRPC resonse
+// status codes 'Cancelled' and 'Unknown', 1 and 2 respectively,
+// the response status codes emitted use an offest of 64
+const statusCodeOffset = 64
+
+const no_version = "dev build <no version set>"
+
+var version = no_version
+
 var (
 	exit = os.Exit
 
 	isUnixSocket func() bool // nil when run on non-unix platform
 
-	help = flag.Bool("help", false,
-		`Print usage instructions and exit.`)
-	plaintext = flag.Bool("plaintext", false,
-		`Use plain-text HTTP/2 when connecting to server (no TLS).`)
-	insecure = flag.Bool("insecure", false,
-		`Skip server certificate and domain verification. (NOT SECURE!). Not
-    	valid with -plaintext option.`)
-	cacert = flag.String("cacert", "",
-		`File containing trusted root certificates for verifying the server.
-    	Ignored if -insecure is specified.`)
-	cert = flag.String("cert", "",
-		`File containing client certificate (public key), to present to the
-    	server. Not valid with -plaintext option. Must also provide -key option.`)
-	key = flag.String("key", "",
-		`File containing client private key, to present to the server. Not valid
-    	with -plaintext option. Must also provide -cert option.`)
-	protoset    multiString
-	protoFiles  multiString
-	importPaths multiString
-	addlHeaders multiString
-	rpcHeaders  multiString
-	reflHeaders multiString
-	authority   = flag.String("authority", "",
-		":authority pseudo header value to be passed along with underlying HTTP/2 requests. It defaults to `host [ \":\" port ]` part of the target url.")
-	data = flag.String("d", "",
-		`JSON request contents. If the value is '@' then the request contents are
-    	read from stdin. For calls that accept a stream of requests, the
-    	contents should include all such request messages concatenated together
-    	(optionally separated by whitespace).`)
-	connectTimeout = flag.String("connect-timeout", "",
-		`The maximum time, in seconds, to wait for connection to be established.
-    	Defaults to 10 seconds.`)
-	keepaliveTime = flag.String("keepalive-time", "",
-		`If present, the maximum idle time in seconds, after which a keepalive
-    	probe is sent. If the connection remains idle and no keepalive response
-    	is received for this same period then the connection is closed and the
-    	operation fails.`)
-	maxTime = flag.String("max-time", "",
-		`The maximum total time the operation can take. This is useful for
-    	preventing batch jobs that use grpcurl from hanging due to slow or bad
-    	network links or due to incorrect stream method usage.`)
-	emitDefaults = flag.Bool("emit-defaults", false,
-		`Emit default values from JSON-encoded responses.`)
-	msgTemplate = flag.Bool("msg-template", false,
-		`When describing messages, show a JSON template for the message type.`)
-	verbose = flag.Bool("v", false,
-		`Enable verbose output.`)
-	serverName = flag.String("servername", "", "Override servername when validating TLS certificate.")
+	flags = flag.NewFlagSet(os.Args[0], flag.ExitOnError)
+
+	help = flags.Bool("help", false, prettify(`
+		Print usage instructions and exit.`))
+	printVersion = flags.Bool("version", false, prettify(`
+		Print version.`))
+	plaintext = flags.Bool("plaintext", false, prettify(`
+		Use plain-text HTTP/2 when connecting to server (no TLS).`))
+	insecure = flags.Bool("insecure", false, prettify(`
+		Skip server certificate and domain verification. (NOT SECURE!) Not
+		valid with -plaintext option.`))
+	cacert = flags.String("cacert", "", prettify(`
+		File containing trusted root certificates for verifying the server.
+		Ignored if -insecure is specified.`))
+	cert = flags.String("cert", "", prettify(`
+		File containing client certificate (public key), to present to the
+		server. Not valid with -plaintext option. Must also provide -key option.`))
+	key = flags.String("key", "", prettify(`
+		File containing client private key, to present to the server. Not valid
+		with -plaintext option. Must also provide -cert option.`))
+	protoset      multiString
+	protoFiles    multiString
+	importPaths   multiString
+	addlHeaders   multiString
+	rpcHeaders    multiString
+	reflHeaders   multiString
+	expandHeaders = flags.Bool("expand-headers", false, prettify(`
+		If set, headers may use '${NAME}' syntax to reference environment
+		variables. These will be expanded to the actual environment variable
+		value before sending to the server. For example, if there is an
+		environment variable defined like FOO=bar, then a header of
+		'key: ${FOO}' would expand to 'key: bar'. This applies to -H,
+		-rpc-header, and -reflect-header options. No other expansion/escaping is
+		performed. This can be used to supply credentials/secrets without having
+		to put them in command-line arguments.`))
+	authority = flags.String("authority", "", prettify(`
+		The authoritative name of the remote server. This value is passed as the
+		value of the ":authority" pseudo-header in the HTTP/2 protocol. When TLS
+		is used, this will also be used as the server name when verifying the
+		server's certificate. It defaults to the address that is provided in the
+		positional arguments.`))
+	userAgent = flags.String("user-agent", "", prettify(`
+		If set, the specified value will be added to the User-Agent header set
+		by the grpc-go library.
+		`))
+	data = flags.String("d", "", prettify(`
+		Data for request contents. If the value is '@' then the request contents
+		are read from stdin. For calls that accept a stream of requests, the
+		contents should include all such request messages concatenated together
+		(possibly delimited; see -format).`))
+	format = flags.String("format", "json", prettify(`
+		The format of request data. The allowed values are 'json' or 'text'. For
+		'json', the input data must be in JSON format. Multiple request values
+		may be concatenated (messages with a JSON representation other than
+		object must be separated by whitespace, such as a newline). For 'text',
+		the input data must be in the protobuf text format, in which case
+		multiple request values must be separated by the "record separator"
+		ASCII character: 0x1E. The stream should not end in a record separator.
+		If it does, it will be interpreted as a final, blank message after the
+		separator.`))
+	allowUnknownFields = flags.Bool("allow-unknown-fields", false, prettify(`
+		When true, the request contents, if 'json' format is used, allows
+		unkown fields to be present. They will be ignored when parsing
+		the request.`))
+	connectTimeout = flags.Float64("connect-timeout", 0, prettify(`
+		The maximum time, in seconds, to wait for connection to be established.
+		Defaults to 10 seconds.`))
+	formatError = flags.Bool("format-error", false, prettify(`
+		When a non-zero status is returned, format the response using the
+		value set by the -format flag .`))
+	keepaliveTime = flags.Float64("keepalive-time", 0, prettify(`
+		If present, the maximum idle time in seconds, after which a keepalive
+		probe is sent. If the connection remains idle and no keepalive response
+		is received for this same period then the connection is closed and the
+		operation fails.`))
+	maxTime = flags.Float64("max-time", 0, prettify(`
+		The maximum total time the operation can take, in seconds. This is
+		useful for preventing batch jobs that use grpcurl from hanging due to
+		slow or bad network links or due to incorrect stream method usage.`))
+	maxMsgSz = flags.Int("max-msg-sz", 0, prettify(`
+		The maximum encoded size of a response message, in bytes, that grpcurl
+		will accept. If not specified, defaults to 4,194,304 (4 megabytes).`))
+	emitDefaults = flags.Bool("emit-defaults", false, prettify(`
+		Emit default values for JSON-encoded responses.`))
+	protosetOut = flags.String("protoset-out", "", prettify(`
+		The name of a file to be written that will contain a FileDescriptorSet
+		proto. With the list and describe verbs, the listed or described
+		elements and their transitive dependencies will be written to the named
+		file if this option is given. When invoking an RPC and this option is
+		given, the method being invoked and its transitive dependencies will be
+		included in the output file.`))
+	msgTemplate = flags.Bool("msg-template", false, prettify(`
+		When describing messages, show a template of input data.`))
+	verbose = flags.Bool("v", false, prettify(`
+		Enable verbose output.`))
+	veryVerbose = flags.Bool("vv", false, prettify(`
+		Enable very verbose output.`))
+	serverName = flags.String("servername", "", prettify(`
+		Override server name when validating TLS certificate. This flag is
+		ignored if -plaintext or -insecure is used.
+		NOTE: Prefer -authority. This flag may be removed in the future. It is
+		an error to use both -authority and -servername (though this will be
+		permitted if they are both set to the same value, to increase backwards
+		compatibility with earlier releases that allowed both to be set).`))
+	reflection = optionalBoolFlag{val: true}
 )
 
 func init() {
-	flag.Var(&addlHeaders, "H",
-		`Additional headers in 'name: value' format. May specify more than one
-    	via multiple flags. These headers will also be included in reflection
-    	requests requests to a server.`)
-	flag.Var(&rpcHeaders, "rpc-header",
-		`Additional RPC headers in 'name: value' format. May specify more than
-    	one via multiple flags. These headers will *only* be used when invoking
-    	the requested RPC method. They are excluded from reflection requests.`)
-	flag.Var(&reflHeaders, "reflect-header",
-		`Additional reflection headers in 'name: value' format. May specify more
-    	than one via multiple flags. These headers will only be used during
-    	reflection requests and will be excluded when invoking the requested RPC
-    	method.`)
-	flag.Var(&protoset, "protoset",
-		`The name of a file containing an encoded FileDescriptorSet. This file's
-    	contents will be used to determine the RPC schema instead of querying
-    	for it from the remote server via the GRPC reflection API. When set: the
-    	'list' action lists the services found in the given descriptors (vs.
-    	those exposed by the remote server), and the 'describe' action describes
-    	symbols found in the given descriptors. May specify more than one via
-    	multiple -protoset flags. It is an error to use both -protoset and
-    	-proto flags.`)
-	flag.Var(&protoFiles, "proto",
-		`The name of a proto source file. Source files given will be used to
-    	determine the RPC schema instead of querying for it from the remote
-    	server via the GRPC reflection API. When set: the 'list' action lists
-    	the services found in the given files and their imports (vs. those
-    	exposed by the remote server), and the 'describe' action describes
-    	symbols found in the given files. May specify more than one via
-    	multiple -proto flags. Imports will be resolved using the given
-    	-import-path flags. Multiple proto files can be specified by specifying
-    	multiple -proto flags. It is an error to use both -protoset and -proto
-    	flags.`)
-	flag.Var(&importPaths, "import-path",
-		`The path to a directory from which proto sources can be imported,
-    	for use with -proto flags. Multiple import paths can be configured by
-    	specifying multiple -import-path flags. Paths will be searched in the
-    	order given. If no import paths are given, all files (including all
-    	imports) must be provided as -proto flags, and grpcurl will attempt to
-    	resolve all import statements from the set of file names given.`)
+	flags.Var(&addlHeaders, "H", prettify(`
+		Additional headers in 'name: value' format. May specify more than one
+		via multiple flags. These headers will also be included in reflection
+		requests to a server.`))
+	flags.Var(&rpcHeaders, "rpc-header", prettify(`
+		Additional RPC headers in 'name: value' format. May specify more than
+		one via multiple flags. These headers will *only* be used when invoking
+		the requested RPC method. They are excluded from reflection requests.`))
+	flags.Var(&reflHeaders, "reflect-header", prettify(`
+		Additional reflection headers in 'name: value' format. May specify more
+		than one via multiple flags. These headers will *only* be used during
+		reflection requests and will be excluded when invoking the requested RPC
+		method.`))
+	flags.Var(&protoset, "protoset", prettify(`
+		The name of a file containing an encoded FileDescriptorSet. This file's
+		contents will be used to determine the RPC schema instead of querying
+		for it from the remote server via the gRPC reflection API. When set: the
+		'list' action lists the services found in the given descriptors (vs.
+		those exposed by the remote server), and the 'describe' action describes
+		symbols found in the given descriptors. May specify more than one via
+		multiple -protoset flags. It is an error to use both -protoset and
+		-proto flags.`))
+	flags.Var(&protoFiles, "proto", prettify(`
+		The name of a proto source file. Source files given will be used to
+		determine the RPC schema instead of querying for it from the remote
+		server via the gRPC reflection API. When set: the 'list' action lists
+		the services found in the given files and their imports (vs. those
+		exposed by the remote server), and the 'describe' action describes
+		symbols found in the given files. May specify more than one via multiple
+		-proto flags. Imports will be resolved using the given -import-path
+		flags. Multiple proto files can be specified by specifying multiple
+		-proto flags. It is an error to use both -protoset and -proto flags.`))
+	flags.Var(&importPaths, "import-path", prettify(`
+		The path to a directory from which proto sources can be imported, for
+		use with -proto flags. Multiple import paths can be configured by
+		specifying multiple -import-path flags. Paths will be searched in the
+		order given. If no import paths are given, all files (including all
+		imports) must be provided as -proto flags, and grpcurl will attempt to
+		resolve all import statements from the set of file names given.`))
+	flags.Var(&reflection, "use-reflection", prettify(`
+		When true, server reflection will be used to determine the RPC schema.
+		Defaults to true unless a -proto or -protoset option is provided. If
+		-use-reflection is used in combination with a -proto or -protoset flag,
+		the provided descriptor sources will be used in addition to server
+		reflection to resolve messages and extensions.`))
 }
 
 type multiString []string
@@ -139,15 +213,74 @@ func (s *multiString) Set(value string) error {
 	return nil
 }
 
+// Uses a file source as a fallback for resolving symbols and extensions, but
+// only uses the reflection source for listing services
+type compositeSource struct {
+	reflection grpcurl.DescriptorSource
+	file       grpcurl.DescriptorSource
+}
+
+func (cs compositeSource) ListServices() ([]string, error) {
+	return cs.reflection.ListServices()
+}
+
+func (cs compositeSource) FindSymbol(fullyQualifiedName string) (desc.Descriptor, error) {
+	d, err := cs.reflection.FindSymbol(fullyQualifiedName)
+	if err == nil {
+		return d, nil
+	}
+	return cs.file.FindSymbol(fullyQualifiedName)
+}
+
+func (cs compositeSource) AllExtensionsForType(typeName string) ([]*desc.FieldDescriptor, error) {
+	exts, err := cs.reflection.AllExtensionsForType(typeName)
+	if err != nil {
+		// On error fall back to file source
+		return cs.file.AllExtensionsForType(typeName)
+	}
+	// Track the tag numbers from the reflection source
+	tags := make(map[int32]bool)
+	for _, ext := range exts {
+		tags[ext.GetNumber()] = true
+	}
+	fileExts, err := cs.file.AllExtensionsForType(typeName)
+	if err != nil {
+		return exts, nil
+	}
+	for _, ext := range fileExts {
+		// Prioritize extensions found via reflection
+		if !tags[ext.GetNumber()] {
+			exts = append(exts, ext)
+		}
+	}
+	return exts, nil
+}
+
 func main() {
-	flag.CommandLine.Usage = usage
-	flag.Parse()
+	flags.Usage = usage
+	flags.Parse(os.Args[1:])
 	if *help {
 		usage()
 		os.Exit(0)
 	}
+	if *printVersion {
+		fmt.Fprintf(os.Stderr, "%s %s\n", filepath.Base(os.Args[0]), version)
+		os.Exit(0)
+	}
 
 	// Do extra validation on arguments and figure out what user asked us to do.
+	if *connectTimeout < 0 {
+		fail(nil, "The -connect-timeout argument must not be negative.")
+	}
+	if *keepaliveTime < 0 {
+		fail(nil, "The -keepalive-time argument must not be negative.")
+	}
+	if *maxTime < 0 {
+		fail(nil, "The -max-time argument must not be negative.")
+	}
+	if *maxMsgSz < 0 {
+		fail(nil, "The -max-msg-sz argument must not be negative.")
+	}
 	if *plaintext && *insecure {
 		fail(nil, "The -plaintext and -insecure arguments are mutually exclusive.")
 	}
@@ -160,8 +293,14 @@ func main() {
 	if (*key == "") != (*cert == "") {
 		fail(nil, "The -cert and -key arguments must be used together and both be present.")
 	}
+	if *format != "json" && *format != "text" {
+		fail(nil, "The -format option must be 'json' or 'text'.")
+	}
+	if *emitDefaults && *format != "json" {
+		warn("The -emit-defaults is only used when using json format.")
+	}
 
-	args := flag.Args()
+	args := flags.Args()
 
 	if len(args) == 0 {
 		fail(nil, "Too few arguments.")
@@ -186,6 +325,14 @@ func main() {
 		invoke = true
 	}
 
+	verbosityLevel := 0
+	if *verbose {
+		verbosityLevel = 1
+	}
+	if *veryVerbose {
+		verbosityLevel = 2
+	}
+
 	var symbol string
 	if invoke {
 		if len(args) == 0 {
@@ -224,42 +371,40 @@ func main() {
 	if len(importPaths) > 0 && len(protoFiles) == 0 {
 		warn("The -import-path argument is not used unless -proto files are used.")
 	}
+	if !reflection.val && len(protoset) == 0 && len(protoFiles) == 0 {
+		fail(nil, "No protoset files or proto files specified and -use-reflection set to false.")
+	}
+
+	// Protoset or protofiles provided and -use-reflection unset
+	if !reflection.set && (len(protoset) > 0 || len(protoFiles) > 0) {
+		reflection.val = false
+	}
 
 	ctx := context.Background()
-	if *maxTime != "" {
-		t, err := strconv.ParseFloat(*maxTime, 64)
-		if err != nil {
-			fail(nil, "The -max-time argument must be a valid number.")
-		}
-		timeout := time.Duration(t * float64(time.Second))
-		ctx, _ = context.WithTimeout(ctx, timeout)
+	if *maxTime > 0 {
+		timeout := time.Duration(*maxTime * float64(time.Second))
+		var cancel context.CancelFunc
+		ctx, cancel = context.WithTimeout(ctx, timeout)
+		defer cancel()
 	}
 
 	dial := func() *grpc.ClientConn {
 		dialTime := 10 * time.Second
-		if *connectTimeout != "" {
-			t, err := strconv.ParseFloat(*connectTimeout, 64)
-			if err != nil {
-				fail(nil, "The -connect-timeout argument must be a valid number.")
-			}
-			dialTime = time.Duration(t * float64(time.Second))
+		if *connectTimeout > 0 {
+			dialTime = time.Duration(*connectTimeout * float64(time.Second))
 		}
 		ctx, cancel := context.WithTimeout(ctx, dialTime)
 		defer cancel()
 		var opts []grpc.DialOption
-		if *keepaliveTime != "" {
-			t, err := strconv.ParseFloat(*keepaliveTime, 64)
-			if err != nil {
-				fail(nil, "The -keepalive-time argument must be a valid number.")
-			}
-			timeout := time.Duration(t * float64(time.Second))
+		if *keepaliveTime > 0 {
+			timeout := time.Duration(*keepaliveTime * float64(time.Second))
 			opts = append(opts, grpc.WithKeepaliveParams(keepalive.ClientParameters{
 				Time:    timeout,
 				Timeout: timeout,
 			}))
 		}
-		if *authority != "" {
-			opts = append(opts, grpc.WithAuthority(*authority))
+		if *maxMsgSz > 0 {
+			opts = append(opts, grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(*maxMsgSz)))
 		}
 		var creds credentials.TransportCredentials
 		if !*plaintext {
@@ -268,12 +413,38 @@ func main() {
 			if err != nil {
 				fail(err, "Failed to configure transport credentials")
 			}
-			if *serverName != "" {
-				if err := creds.OverrideServerName(*serverName); err != nil {
-					fail(err, "Failed to override server name as %q", *serverName)
+
+			// can use either -servername or -authority; but not both
+			if *serverName != "" && *authority != "" {
+				if *serverName == *authority {
+					warn("Both -servername and -authority are present; prefer only -authority.")
+				} else {
+					fail(nil, "Cannot specify different values for -servername and -authority.")
 				}
 			}
+			overrideName := *serverName
+			if overrideName == "" {
+				overrideName = *authority
+			}
+
+			if overrideName != "" {
+				if err := creds.OverrideServerName(overrideName); err != nil {
+					fail(err, "Failed to override server name as %q", overrideName)
+				}
+			}
+		} else if *authority != "" {
+			opts = append(opts, grpc.WithAuthority(*authority))
 		}
+
+		grpcurlUA := "grpcurl/" + version
+		if version == no_version {
+			grpcurlUA = "grpcurl/dev-build (no version set)"
+		}
+		if *userAgent != "" {
+			grpcurlUA = *userAgent + " " + grpcurlUA
+		}
+		opts = append(opts, grpc.WithUserAgent(grpcurlUA))
+
 		network := "tcp"
 		if isUnixSocket != nil && isUnixSocket() {
 			network = "unix"
@@ -284,28 +455,60 @@ func main() {
 		}
 		return cc
 	}
+	printFormattedStatus := func(w io.Writer, stat *status.Status, formatter grpcurl.Formatter) {
+		formattedStatus, err := formatter(stat.Proto())
+		if err != nil {
+			fmt.Fprintf(w, "ERROR: %v", err.Error())
+		}
+		fmt.Fprint(w, formattedStatus)
+	}
+
+	if *expandHeaders {
+		var err error
+		addlHeaders, err = grpcurl.ExpandHeaders(addlHeaders)
+		if err != nil {
+			fail(err, "Failed to expand additional headers")
+		}
+		rpcHeaders, err = grpcurl.ExpandHeaders(rpcHeaders)
+		if err != nil {
+			fail(err, "Failed to expand rpc headers")
+		}
+		reflHeaders, err = grpcurl.ExpandHeaders(reflHeaders)
+		if err != nil {
+			fail(err, "Failed to expand reflection headers")
+		}
+	}
 
 	var cc *grpc.ClientConn
 	var descSource grpcurl.DescriptorSource
 	var refClient *grpcreflect.Client
+	var fileSource grpcurl.DescriptorSource
 	if len(protoset) > 0 {
 		var err error
-		descSource, err = grpcurl.DescriptorSourceFromProtoSets(protoset...)
+		fileSource, err = grpcurl.DescriptorSourceFromProtoSets(protoset...)
 		if err != nil {
 			fail(err, "Failed to process proto descriptor sets.")
 		}
 	} else if len(protoFiles) > 0 {
 		var err error
-		descSource, err = grpcurl.DescriptorSourceFromProtoFiles(importPaths, protoFiles...)
+		fileSource, err = grpcurl.DescriptorSourceFromProtoFiles(importPaths, protoFiles...)
 		if err != nil {
 			fail(err, "Failed to process proto source files.")
 		}
-	} else {
+	}
+	if reflection.val {
 		md := grpcurl.MetadataFromHeaders(append(addlHeaders, reflHeaders...))
 		refCtx := metadata.NewOutgoingContext(ctx, md)
 		cc = dial()
 		refClient = grpcreflect.NewClient(refCtx, reflectpb.NewServerReflectionClient(cc))
-		descSource = grpcurl.DescriptorSourceFromServer(ctx, refClient)
+		reflSource := grpcurl.DescriptorSourceFromServer(ctx, refClient)
+		if fileSource != nil {
+			descSource = compositeSource{reflSource, fileSource}
+		} else {
+			descSource = reflSource
+		}
+	} else {
+		descSource = fileSource
 	}
 
 	// arrange for the RPCs to be cleanly shutdown
@@ -339,6 +542,9 @@ func main() {
 					fmt.Printf("%s\n", svc)
 				}
 			}
+			if err := writeProtoset(descSource, svcs...); err != nil {
+				fail(err, "Failed to write protoset to %s", *protosetOut)
+			}
 		} else {
 			methods, err := grpcurl.ListMethods(descSource, symbol)
 			if err != nil {
@@ -351,6 +557,9 @@ func main() {
 					fmt.Printf("%s\n", m)
 				}
 			}
+			if err := writeProtoset(descSource, symbol); err != nil {
+				fail(err, "Failed to write protoset to %s", *protosetOut)
+			}
 		}
 
 	} else if describe {
@@ -378,77 +587,142 @@ func main() {
 				fail(err, "Failed to resolve symbol %q", s)
 			}
 
-			txt, err := grpcurl.GetDescriptorText(dsc, descSource)
-			if err != nil {
-				fail(err, "Failed to describe symbol %q", s)
-			}
-
-			switch dsc.(type) {
+			fqn := dsc.GetFullyQualifiedName()
+			var elementType string
+			switch d := dsc.(type) {
 			case *desc.MessageDescriptor:
-				fmt.Printf("%s is a message:\n", dsc.GetFullyQualifiedName())
+				elementType = "a message"
+				parent, ok := d.GetParent().(*desc.MessageDescriptor)
+				if ok {
+					if d.IsMapEntry() {
+						for _, f := range parent.GetFields() {
+							if f.IsMap() && f.GetMessageType() == d {
+								// found it: describe the map field instead
+								elementType = "the entry type for a map field"
+								dsc = f
+								break
+							}
+						}
+					} else {
+						// see if it's a group
+						for _, f := range parent.GetFields() {
+							if f.GetType() == descriptorpb.FieldDescriptorProto_TYPE_GROUP && f.GetMessageType() == d {
+								// found it: describe the map field instead
+								elementType = "the type of a group field"
+								dsc = f
+								break
+							}
+						}
+					}
+				}
 			case *desc.FieldDescriptor:
-				fmt.Printf("%s is a field:\n", dsc.GetFullyQualifiedName())
+				elementType = "a field"
+				if d.GetType() == descriptorpb.FieldDescriptorProto_TYPE_GROUP {
+					elementType = "a group field"
+				} else if d.IsExtension() {
+					elementType = "an extension"
+				}
 			case *desc.OneOfDescriptor:
-				fmt.Printf("%s is a one-of:\n", dsc.GetFullyQualifiedName())
+				elementType = "a one-of"
 			case *desc.EnumDescriptor:
-				fmt.Printf("%s is an enum:\n", dsc.GetFullyQualifiedName())
+				elementType = "an enum"
 			case *desc.EnumValueDescriptor:
-				fmt.Printf("%s is an enum value:\n", dsc.GetFullyQualifiedName())
+				elementType = "an enum value"
 			case *desc.ServiceDescriptor:
-				fmt.Printf("%s is a service:\n", dsc.GetFullyQualifiedName())
+				elementType = "a service"
 			case *desc.MethodDescriptor:
-				fmt.Printf("%s is a method:\n", dsc.GetFullyQualifiedName())
+				elementType = "a method"
 			default:
 				err = fmt.Errorf("descriptor has unrecognized type %T", dsc)
 				fail(err, "Failed to describe symbol %q", s)
 			}
+
+			txt, err := grpcurl.GetDescriptorText(dsc, descSource)
+			if err != nil {
+				fail(err, "Failed to describe symbol %q", s)
+			}
+			fmt.Printf("%s is %s:\n", fqn, elementType)
 			fmt.Println(txt)
 
 			if dsc, ok := dsc.(*desc.MessageDescriptor); ok && *msgTemplate {
 				// for messages, also show a template in JSON, to make it easier to
 				// create a request to invoke an RPC
-				tmpl := makeTemplate(dynamic.NewMessage(dsc))
-				fmt.Println("\nMessage template:")
-				jsm := jsonpb.Marshaler{Indent: "  ", EmitDefaults: true}
-				err := jsm.Marshal(os.Stdout, tmpl)
+				tmpl := grpcurl.MakeTemplate(dsc)
+				options := grpcurl.FormatOptions{EmitJSONDefaultFields: true}
+				_, formatter, err := grpcurl.RequestParserAndFormatter(grpcurl.Format(*format), descSource, nil, options)
+				if err != nil {
+					fail(err, "Failed to construct formatter for %q", *format)
+				}
+				str, err := formatter(tmpl)
 				if err != nil {
 					fail(err, "Failed to print template for message %s", s)
 				}
-				fmt.Println()
+				fmt.Println("\nMessage template:")
+				fmt.Println(str)
 			}
 		}
+		if err := writeProtoset(descSource, symbols...); err != nil {
+			fail(err, "Failed to write protoset to %s", *protosetOut)
+		}
 
 	} else {
 		// Invoke an RPC
 		if cc == nil {
 			cc = dial()
 		}
-		var dec *json.Decoder
+		var in io.Reader
 		if *data == "@" {
-			dec = json.NewDecoder(os.Stdin)
+			in = os.Stdin
 		} else {
-			dec = json.NewDecoder(strings.NewReader(*data))
+			in = strings.NewReader(*data)
 		}
 
-		h := &handler{dec: dec, descSource: descSource}
-		err := grpcurl.InvokeRpc(ctx, descSource, cc, symbol, append(addlHeaders, rpcHeaders...), h, h.getRequestData)
+		// if not verbose output, then also include record delimiters
+		// between each message, so output could potentially be piped
+		// to another grpcurl process
+		includeSeparators := verbosityLevel == 0
+		options := grpcurl.FormatOptions{
+			EmitJSONDefaultFields: *emitDefaults,
+			IncludeTextSeparator:  includeSeparators,
+			AllowUnknownFields:    *allowUnknownFields,
+		}
+		rf, formatter, err := grpcurl.RequestParserAndFormatter(grpcurl.Format(*format), descSource, in, options)
 		if err != nil {
-			fail(err, "Error invoking method %q", symbol)
+			fail(err, "Failed to construct request parser and formatter for %q", *format)
+		}
+		h := &grpcurl.DefaultEventHandler{
+			Out:            os.Stdout,
+			Formatter:      formatter,
+			VerbosityLevel: verbosityLevel,
+		}
+
+		err = grpcurl.InvokeRPC(ctx, descSource, cc, symbol, append(addlHeaders, rpcHeaders...), h, rf.Next)
+		if err != nil {
+			if errStatus, ok := status.FromError(err); ok && *formatError {
+				h.Status = errStatus
+			} else {
+				fail(err, "Error invoking method %q", symbol)
+			}
 		}
 		reqSuffix := ""
 		respSuffix := ""
-		if h.reqCount != 1 {
+		reqCount := rf.NumRequests()
+		if reqCount != 1 {
 			reqSuffix = "s"
 		}
-		if h.respCount != 1 {
+		if h.NumResponses != 1 {
 			respSuffix = "s"
 		}
-		if *verbose {
-			fmt.Printf("Sent %d request%s and received %d response%s\n", h.reqCount, reqSuffix, h.respCount, respSuffix)
+		if verbosityLevel > 0 {
+			fmt.Printf("Sent %d request%s and received %d response%s\n", reqCount, reqSuffix, h.NumResponses, respSuffix)
 		}
-		if h.stat.Code() != codes.OK {
-			fmt.Fprintf(os.Stderr, "ERROR:\n  Code: %s\n  Message: %s\n", h.stat.Code().String(), h.stat.Message())
-			exit(1)
+		if h.Status.Code() != codes.OK {
+			if *formatError {
+				printFormattedStatus(os.Stderr, h.Status, formatter)
+			} else {
+				grpcurl.PrintStatus(os.Stderr, h.Status, formatter)
+			}
+			exit(statusCodeOffset + int(h.Status.Code()))
 		}
 	}
 }
@@ -457,8 +731,8 @@ func usage() {
 	fmt.Fprintf(os.Stderr, `Usage:
 	%s [flags] [address] [list|describe] [symbol]
 
-The 'host:port' is only optional when used with 'list' or 'describe' and a
-protoset flag is provided.
+The 'address' is only optional when used with 'list' or 'describe' and a
+protoset or proto flag is provided.
 
 If 'list' is indicated, the symbol (if present) should be a fully-qualified
 service name. If present, all methods of that service are listed. If not
@@ -470,17 +744,37 @@ is given then the descriptors for all exposed or known services are shown.
 
 If neither verb is present, the symbol must be a fully-qualified method name in
 'service/method' or 'service.method' format. In this case, the request body will
-be used to invoke the named method. If no body is given, an empty instance of
-the method's request type will be sent.
+be used to invoke the named method. If no body is given but one is required
+(i.e. the method is unary or server-streaming), an empty instance of the
+method's request type will be sent.
 
 The address will typically be in the form "host:port" where host can be an IP
 address or a hostname and port is a numeric port or service name. If an IPv6
 address is given, it must be surrounded by brackets, like "[2001:db8::1]". For
 Unix variants, if a -unix=true flag is present, then the address must be the
 path to the domain socket.
-`, os.Args[0])
-	flag.PrintDefaults()
 
+Available flags:
+`, os.Args[0])
+	flags.PrintDefaults()
+}
+
+func prettify(docString string) string {
+	parts := strings.Split(docString, "\n")
+
+	// cull empty lines and also remove trailing and leading spaces
+	// from each line in the doc string
+	j := 0
+	for _, part := range parts {
+		part = strings.TrimSpace(part)
+		if part == "" {
+			continue
+		}
+		parts[j] = part
+		j++
+	}
+
+	return strings.Join(parts[:j], "\n"+indent())
 }
 
 func warn(msg string, args ...interface{}) {
@@ -504,124 +798,39 @@ func fail(err error, msg string, args ...interface{}) {
 	}
 }
 
-type handler struct {
-	dec        *json.Decoder
-	descSource grpcurl.DescriptorSource
-	reqCount   int
-	respCount  int
-	stat       *status.Status
-}
-
-func (h *handler) OnResolveMethod(md *desc.MethodDescriptor) {
-	if *verbose {
-		txt, err := grpcurl.GetDescriptorText(md, h.descSource)
-		if err == nil {
-			fmt.Printf("\nResolved method descriptor:\n%s\n", txt)
-		}
+func writeProtoset(descSource grpcurl.DescriptorSource, symbols ...string) error {
+	if *protosetOut == "" {
+		return nil
 	}
-}
-
-func (*handler) OnSendHeaders(md metadata.MD) {
-	if *verbose {
-		fmt.Printf("\nRequest metadata to send:\n%s\n", grpcurl.MetadataToString(md))
-	}
-}
-
-func (h *handler) getRequestData() ([]byte, error) {
-	// we don't use a mutex, though this methods will be called from different goroutine
-	// than other methods for bidi calls, because this method does not share any state
-	// with the other methods.
-	var msg json.RawMessage
-	if err := h.dec.Decode(&msg); err != nil {
-		return nil, err
-	}
-	h.reqCount++
-	return msg, nil
-}
-
-func (*handler) OnReceiveHeaders(md metadata.MD) {
-	if *verbose {
-		fmt.Printf("\nResponse headers received:\n%s\n", grpcurl.MetadataToString(md))
-	}
-}
-
-func (h *handler) OnReceiveResponse(resp proto.Message) {
-	h.respCount++
-	if *verbose {
-		fmt.Print("\nResponse contents:\n")
-	}
-	jsm := jsonpb.Marshaler{EmitDefaults: *emitDefaults, Indent: "  "}
-	respStr, err := jsm.MarshalToString(resp)
+	f, err := os.Create(*protosetOut)
 	if err != nil {
-		fail(err, "failed to generate JSON form of response message")
+		return err
 	}
-	fmt.Println(respStr)
+	defer f.Close()
+	return grpcurl.WriteProtoset(f, descSource, symbols...)
 }
 
-func (h *handler) OnReceiveTrailers(stat *status.Status, md metadata.MD) {
-	h.stat = stat
-	if *verbose {
-		fmt.Printf("\nResponse trailers received:\n%s\n", grpcurl.MetadataToString(md))
-	}
+type optionalBoolFlag struct {
+	set, val bool
 }
 
-// makeTemplate fleshes out the given message so that it is a suitable template for creating
-// an instance of that message in JSON. In particular, it ensures that any repeated fields
-// (which include map fields) are not empty, so they will render with a single element (to
-// show the types and optionally nested fields). It also ensures that nested messages are
-// not nil by setting them to a message that is also fleshed out as a template message.
-func makeTemplate(msg proto.Message) proto.Message {
-	dm, ok := msg.(*dynamic.Message)
-	if !ok {
-		return msg
+func (f *optionalBoolFlag) String() string {
+	if !f.set {
+		return "unset"
 	}
-	// for repeated fields, add a single element with default value
-	// and for message fields, add a message with all default fields
-	// that also has non-nil message and non-empty repeated fields
-	for _, fd := range dm.GetMessageDescriptor().GetFields() {
-		if fd.IsRepeated() {
-			switch fd.GetType() {
-			case descpb.FieldDescriptorProto_TYPE_FIXED32,
-				descpb.FieldDescriptorProto_TYPE_UINT32:
-				dm.AddRepeatedField(fd, uint32(0))
-
-			case descpb.FieldDescriptorProto_TYPE_SFIXED32,
-				descpb.FieldDescriptorProto_TYPE_SINT32,
-				descpb.FieldDescriptorProto_TYPE_INT32,
-				descpb.FieldDescriptorProto_TYPE_ENUM:
-				dm.AddRepeatedField(fd, int32(0))
-
-			case descpb.FieldDescriptorProto_TYPE_FIXED64,
-				descpb.FieldDescriptorProto_TYPE_UINT64:
-				dm.AddRepeatedField(fd, uint64(0))
-
-			case descpb.FieldDescriptorProto_TYPE_SFIXED64,
-				descpb.FieldDescriptorProto_TYPE_SINT64,
-				descpb.FieldDescriptorProto_TYPE_INT64:
-				dm.AddRepeatedField(fd, int64(0))
-
-			case descpb.FieldDescriptorProto_TYPE_STRING:
-				dm.AddRepeatedField(fd, "")
-
-			case descpb.FieldDescriptorProto_TYPE_BYTES:
-				dm.AddRepeatedField(fd, []byte{})
-
-			case descpb.FieldDescriptorProto_TYPE_BOOL:
-				dm.AddRepeatedField(fd, false)
-
-			case descpb.FieldDescriptorProto_TYPE_FLOAT:
-				dm.AddRepeatedField(fd, float32(0))
-
-			case descpb.FieldDescriptorProto_TYPE_DOUBLE:
-				dm.AddRepeatedField(fd, float64(0))
-
-			case descpb.FieldDescriptorProto_TYPE_MESSAGE,
-				descpb.FieldDescriptorProto_TYPE_GROUP:
-				dm.AddRepeatedField(fd, makeTemplate(dynamic.NewMessage(fd.GetMessageType())))
-			}
-		} else if fd.GetMessageType() != nil {
-			dm.SetField(fd, makeTemplate(dynamic.NewMessage(fd.GetMessageType())))
-		}
-	}
-	return dm
+	return strconv.FormatBool(f.val)
+}
+
+func (f *optionalBoolFlag) Set(s string) error {
+	v, err := strconv.ParseBool(s)
+	if err != nil {
+		return err
+	}
+	f.set = true
+	f.val = v
+	return nil
+}
+
+func (f *optionalBoolFlag) IsBoolFlag() bool {
+	return true
 }

cmd/grpcurl/indent_test.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"bytes"
+	"flag"
+	"testing"
+)
+
+func TestFlagDocIndent(t *testing.T) {
+	// Tests the prettify() and indent() function. The indent() function
+	// differs by Go version, due to differences in "flags" package across
+	// versions. Run with multiple versions of Go to ensure that doc output
+	// is properly indented, regardless of Go version.
+
+	var fs flag.FlagSet
+	var buf bytes.Buffer
+	fs.SetOutput(&buf)
+
+	fs.String("foo", "", prettify(`
+		This is a flag doc string.
+		It has multiple lines.
+		More than two, actually.`))
+	fs.Int("bar", 100, prettify(`This is a simple flag doc string.`))
+	fs.Bool("baz", false, prettify(`
+		This is another long doc string.
+		It also has multiple lines. But not as long as the first one.`))
+
+	fs.PrintDefaults()
+
+	expected :=
+		`  -bar int
+    	This is a simple flag doc string. (default 100)
+  -baz
+    	This is another long doc string.
+    	It also has multiple lines. But not as long as the first one.
+  -foo string
+    	This is a flag doc string.
+    	It has multiple lines.
+    	More than two, actually.
+`
+
+	actual := buf.String()
+	if actual != expected {
+		t.Errorf("Flag output had wrong indentation.\nExpecting:\n%s\nGot:\n%s", expected, actual)
+	}
+}

cmd/grpcurl/unix.go

@@ -2,11 +2,9 @@
 
 package main
 
-import "flag"
-
 var (
-	unix = flag.Bool("unix", false,
-		`Indicates that the server address is the path to a Unix domain socket.`)
+	unix = flags.Bool("unix", false, prettify(`
+		Indicates that the server address is the path to a Unix domain socket.`))
 )
 
 func init() {

desc_source.go

@@ -0,0 +1,304 @@
+package grpcurl
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"sync"
+
+	"github.com/golang/protobuf/proto" //lint:ignore SA1019 we have to import this because it appears in exported API
+	"github.com/jhump/protoreflect/desc"
+	"github.com/jhump/protoreflect/desc/protoparse"
+	"github.com/jhump/protoreflect/dynamic"
+	"github.com/jhump/protoreflect/grpcreflect"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"google.golang.org/protobuf/types/descriptorpb"
+)
+
+// ErrReflectionNotSupported is returned by DescriptorSource operations that
+// rely on interacting with the reflection service when the source does not
+// actually expose the reflection service. When this occurs, an alternate source
+// (like file descriptor sets) must be used.
+var ErrReflectionNotSupported = errors.New("server does not support the reflection API")
+
+// DescriptorSource is a source of protobuf descriptor information. It can be backed by a FileDescriptorSet
+// proto (like a file generated by protoc) or a remote server that supports the reflection API.
+type DescriptorSource interface {
+	// ListServices returns a list of fully-qualified service names. It will be all services in a set of
+	// descriptor files or the set of all services exposed by a gRPC server.
+	ListServices() ([]string, error)
+	// FindSymbol returns a descriptor for the given fully-qualified symbol name.
+	FindSymbol(fullyQualifiedName string) (desc.Descriptor, error)
+	// AllExtensionsForType returns all known extension fields that extend the given message type name.
+	AllExtensionsForType(typeName string) ([]*desc.FieldDescriptor, error)
+}
+
+// DescriptorSourceFromProtoSets creates a DescriptorSource that is backed by the named files, whose contents
+// are encoded FileDescriptorSet protos.
+func DescriptorSourceFromProtoSets(fileNames ...string) (DescriptorSource, error) {
+	files := &descriptorpb.FileDescriptorSet{}
+	for _, fileName := range fileNames {
+		b, err := ioutil.ReadFile(fileName)
+		if err != nil {
+			return nil, fmt.Errorf("could not load protoset file %q: %v", fileName, err)
+		}
+		var fs descriptorpb.FileDescriptorSet
+		err = proto.Unmarshal(b, &fs)
+		if err != nil {
+			return nil, fmt.Errorf("could not parse contents of protoset file %q: %v", fileName, err)
+		}
+		files.File = append(files.File, fs.File...)
+	}
+	return DescriptorSourceFromFileDescriptorSet(files)
+}
+
+// DescriptorSourceFromProtoFiles creates a DescriptorSource that is backed by the named files,
+// whose contents are Protocol Buffer source files. The given importPaths are used to locate
+// any imported files.
+func DescriptorSourceFromProtoFiles(importPaths []string, fileNames ...string) (DescriptorSource, error) {
+	fileNames, err := protoparse.ResolveFilenames(importPaths, fileNames...)
+	if err != nil {
+		return nil, err
+	}
+	p := protoparse.Parser{
+		ImportPaths:           importPaths,
+		InferImportPaths:      len(importPaths) == 0,
+		IncludeSourceCodeInfo: true,
+	}
+	fds, err := p.ParseFiles(fileNames...)
+	if err != nil {
+		return nil, fmt.Errorf("could not parse given files: %v", err)
+	}
+	return DescriptorSourceFromFileDescriptors(fds...)
+}
+
+// DescriptorSourceFromFileDescriptorSet creates a DescriptorSource that is backed by the FileDescriptorSet.
+func DescriptorSourceFromFileDescriptorSet(files *descriptorpb.FileDescriptorSet) (DescriptorSource, error) {
+	unresolved := map[string]*descriptorpb.FileDescriptorProto{}
+	for _, fd := range files.File {
+		unresolved[fd.GetName()] = fd
+	}
+	resolved := map[string]*desc.FileDescriptor{}
+	for _, fd := range files.File {
+		_, err := resolveFileDescriptor(unresolved, resolved, fd.GetName())
+		if err != nil {
+			return nil, err
+		}
+	}
+	return &fileSource{files: resolved}, nil
+}
+
+func resolveFileDescriptor(unresolved map[string]*descriptorpb.FileDescriptorProto, resolved map[string]*desc.FileDescriptor, filename string) (*desc.FileDescriptor, error) {
+	if r, ok := resolved[filename]; ok {
+		return r, nil
+	}
+	fd, ok := unresolved[filename]
+	if !ok {
+		return nil, fmt.Errorf("no descriptor found for %q", filename)
+	}
+	deps := make([]*desc.FileDescriptor, 0, len(fd.GetDependency()))
+	for _, dep := range fd.GetDependency() {
+		depFd, err := resolveFileDescriptor(unresolved, resolved, dep)
+		if err != nil {
+			return nil, err
+		}
+		deps = append(deps, depFd)
+	}
+	result, err := desc.CreateFileDescriptor(fd, deps...)
+	if err != nil {
+		return nil, err
+	}
+	resolved[filename] = result
+	return result, nil
+}
+
+// DescriptorSourceFromFileDescriptors creates a DescriptorSource that is backed by the given
+// file descriptors
+func DescriptorSourceFromFileDescriptors(files ...*desc.FileDescriptor) (DescriptorSource, error) {
+	fds := map[string]*desc.FileDescriptor{}
+	for _, fd := range files {
+		if err := addFile(fd, fds); err != nil {
+			return nil, err
+		}
+	}
+	return &fileSource{files: fds}, nil
+}
+
+func addFile(fd *desc.FileDescriptor, fds map[string]*desc.FileDescriptor) error {
+	name := fd.GetName()
+	if existing, ok := fds[name]; ok {
+		// already added this file
+		if existing != fd {
+			// doh! duplicate files provided
+			return fmt.Errorf("given files include multiple copies of %q", name)
+		}
+		return nil
+	}
+	fds[name] = fd
+	for _, dep := range fd.GetDependencies() {
+		if err := addFile(dep, fds); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+type fileSource struct {
+	files  map[string]*desc.FileDescriptor
+	er     *dynamic.ExtensionRegistry
+	erInit sync.Once
+}
+
+func (fs *fileSource) ListServices() ([]string, error) {
+	set := map[string]bool{}
+	for _, fd := range fs.files {
+		for _, svc := range fd.GetServices() {
+			set[svc.GetFullyQualifiedName()] = true
+		}
+	}
+	sl := make([]string, 0, len(set))
+	for svc := range set {
+		sl = append(sl, svc)
+	}
+	return sl, nil
+}
+
+// GetAllFiles returns all of the underlying file descriptors. This is
+// more thorough and more efficient than the fallback strategy used by
+// the GetAllFiles package method, for enumerating all files from a
+// descriptor source.
+func (fs *fileSource) GetAllFiles() ([]*desc.FileDescriptor, error) {
+	files := make([]*desc.FileDescriptor, len(fs.files))
+	i := 0
+	for _, fd := range fs.files {
+		files[i] = fd
+		i++
+	}
+	return files, nil
+}
+
+func (fs *fileSource) FindSymbol(fullyQualifiedName string) (desc.Descriptor, error) {
+	for _, fd := range fs.files {
+		if dsc := fd.FindSymbol(fullyQualifiedName); dsc != nil {
+			return dsc, nil
+		}
+	}
+	return nil, notFound("Symbol", fullyQualifiedName)
+}
+
+func (fs *fileSource) AllExtensionsForType(typeName string) ([]*desc.FieldDescriptor, error) {
+	fs.erInit.Do(func() {
+		fs.er = &dynamic.ExtensionRegistry{}
+		for _, fd := range fs.files {
+			fs.er.AddExtensionsFromFile(fd)
+		}
+	})
+	return fs.er.AllExtensionsForType(typeName), nil
+}
+
+// DescriptorSourceFromServer creates a DescriptorSource that uses the given gRPC reflection client
+// to interrogate a server for descriptor information. If the server does not support the reflection
+// API then the various DescriptorSource methods will return ErrReflectionNotSupported
+func DescriptorSourceFromServer(_ context.Context, refClient *grpcreflect.Client) DescriptorSource {
+	return serverSource{client: refClient}
+}
+
+type serverSource struct {
+	client *grpcreflect.Client
+}
+
+func (ss serverSource) ListServices() ([]string, error) {
+	svcs, err := ss.client.ListServices()
+	return svcs, reflectionSupport(err)
+}
+
+func (ss serverSource) FindSymbol(fullyQualifiedName string) (desc.Descriptor, error) {
+	file, err := ss.client.FileContainingSymbol(fullyQualifiedName)
+	if err != nil {
+		return nil, reflectionSupport(err)
+	}
+	d := file.FindSymbol(fullyQualifiedName)
+	if d == nil {
+		return nil, notFound("Symbol", fullyQualifiedName)
+	}
+	return d, nil
+}
+
+func (ss serverSource) AllExtensionsForType(typeName string) ([]*desc.FieldDescriptor, error) {
+	var exts []*desc.FieldDescriptor
+	nums, err := ss.client.AllExtensionNumbersForType(typeName)
+	if err != nil {
+		return nil, reflectionSupport(err)
+	}
+	for _, fieldNum := range nums {
+		ext, err := ss.client.ResolveExtension(typeName, fieldNum)
+		if err != nil {
+			return nil, reflectionSupport(err)
+		}
+		exts = append(exts, ext)
+	}
+	return exts, nil
+}
+
+func reflectionSupport(err error) error {
+	if err == nil {
+		return nil
+	}
+	if stat, ok := status.FromError(err); ok && stat.Code() == codes.Unimplemented {
+		return ErrReflectionNotSupported
+	}
+	return err
+}
+
+// WriteProtoset will use the given descriptor source to resolve all of the given
+// symbols and write a proto file descriptor set with their definitions to the
+// given output. The output will include descriptors for all files in which the
+// symbols are defined as well as their transitive dependencies.
+func WriteProtoset(out io.Writer, descSource DescriptorSource, symbols ...string) error {
+	// compute set of file descriptors
+	filenames := make([]string, 0, len(symbols))
+	fds := make(map[string]*desc.FileDescriptor, len(symbols))
+	for _, sym := range symbols {
+		d, err := descSource.FindSymbol(sym)
+		if err != nil {
+			return fmt.Errorf("failed to find descriptor for %q: %v", sym, err)
+		}
+		fd := d.GetFile()
+		if _, ok := fds[fd.GetName()]; !ok {
+			fds[fd.GetName()] = fd
+			filenames = append(filenames, fd.GetName())
+		}
+	}
+	// now expand that to include transitive dependencies in topologically sorted
+	// order (such that file always appears after its dependencies)
+	expandedFiles := make(map[string]struct{}, len(fds))
+	allFilesSlice := make([]*descriptorpb.FileDescriptorProto, 0, len(fds))
+	for _, filename := range filenames {
+		allFilesSlice = addFilesToSet(allFilesSlice, expandedFiles, fds[filename])
+	}
+	// now we can serialize to file
+	b, err := proto.Marshal(&descriptorpb.FileDescriptorSet{File: allFilesSlice})
+	if err != nil {
+		return fmt.Errorf("failed to serialize file descriptor set: %v", err)
+	}
+	if _, err := out.Write(b); err != nil {
+		return fmt.Errorf("failed to write file descriptor set: %v", err)
+	}
+	return nil
+}
+
+func addFilesToSet(allFiles []*descriptorpb.FileDescriptorProto, expanded map[string]struct{}, fd *desc.FileDescriptor) []*descriptorpb.FileDescriptorProto {
+	if _, ok := expanded[fd.GetName()]; ok {
+		// already seen this one
+		return allFiles
+	}
+	expanded[fd.GetName()] = struct{}{}
+	// add all dependencies first
+	for _, dep := range fd.GetDependencies() {
+		allFiles = addFilesToSet(allFiles, expanded, dep)
+	}
+	return append(allFiles, fd.AsFileDescriptorProto())
+}

desc_source_test.go

@@ -0,0 +1,62 @@
+package grpcurl
+
+import (
+	"bytes"
+	"io/ioutil"
+	"testing"
+
+	"github.com/golang/protobuf/proto" //lint:ignore SA1019 we have to import this because it appears in exported API
+	"google.golang.org/protobuf/types/descriptorpb"
+)
+
+func TestWriteProtoset(t *testing.T) {
+	exampleProtoset, err := loadProtoset("./internal/testing/example.protoset")
+	if err != nil {
+		t.Fatalf("failed to load example.protoset: %v", err)
+	}
+	testProtoset, err := loadProtoset("./internal/testing/test.protoset")
+	if err != nil {
+		t.Fatalf("failed to load test.protoset: %v", err)
+	}
+
+	mergedProtoset := &descriptorpb.FileDescriptorSet{
+		File: append(exampleProtoset.File, testProtoset.File...),
+	}
+
+	descSrc, err := DescriptorSourceFromFileDescriptorSet(mergedProtoset)
+	if err != nil {
+		t.Fatalf("failed to create descriptor source: %v", err)
+	}
+
+	checkWriteProtoset(t, descSrc, exampleProtoset, "TestService")
+	checkWriteProtoset(t, descSrc, testProtoset, "testing.TestService")
+	checkWriteProtoset(t, descSrc, mergedProtoset, "TestService", "testing.TestService")
+}
+
+func loadProtoset(path string) (*descriptorpb.FileDescriptorSet, error) {
+	b, err := ioutil.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	var protoset descriptorpb.FileDescriptorSet
+	if err := proto.Unmarshal(b, &protoset); err != nil {
+		return nil, err
+	}
+	return &protoset, nil
+}
+
+func checkWriteProtoset(t *testing.T, descSrc DescriptorSource, protoset *descriptorpb.FileDescriptorSet, symbols ...string) {
+	var buf bytes.Buffer
+	if err := WriteProtoset(&buf, descSrc, symbols...); err != nil {
+		t.Fatalf("failed to write protoset: %v", err)
+	}
+
+	var result descriptorpb.FileDescriptorSet
+	if err := proto.Unmarshal(buf.Bytes(), &result); err != nil {
+		t.Fatalf("failed to unmarshal written protoset: %v", err)
+	}
+
+	if !proto.Equal(protoset, &result) {
+		t.Fatalf("written protoset not equal to input:\nExpecting: %s\nActual: %s", protoset, &result)
+	}
+}

format.go

@@ -0,0 +1,529 @@
+package grpcurl
+
+import (
+	"bufio"
+	"bytes"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"io"
+	"reflect"
+	"strings"
+	"sync"
+
+	"github.com/golang/protobuf/jsonpb" //lint:ignore SA1019 we have to import this because it appears in exported API
+	"github.com/golang/protobuf/proto"  //lint:ignore SA1019 we have to import this because it appears in exported API
+	"github.com/jhump/protoreflect/desc"
+	"github.com/jhump/protoreflect/dynamic"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/status"
+)
+
+// RequestParser processes input into messages.
+type RequestParser interface {
+	// Next parses input data into the given request message. If called after
+	// input is exhausted, it returns io.EOF. If the caller re-uses the same
+	// instance in multiple calls to Next, it should call msg.Reset() in between
+	// each call.
+	Next(msg proto.Message) error
+	// NumRequests returns the number of messages that have been parsed and
+	// returned by a call to Next.
+	NumRequests() int
+}
+
+type jsonRequestParser struct {
+	dec          *json.Decoder
+	unmarshaler  jsonpb.Unmarshaler
+	requestCount int
+}
+
+// NewJSONRequestParser returns a RequestParser that reads data in JSON format
+// from the given reader. The given resolver is used to assist with decoding of
+// google.protobuf.Any messages.
+//
+// Input data that contains more than one message should just include all
+// messages concatenated (though whitespace is necessary to separate some kinds
+// of values in JSON).
+//
+// If the given reader has no data, the returned parser will return io.EOF on
+// the very first call.
+func NewJSONRequestParser(in io.Reader, resolver jsonpb.AnyResolver) RequestParser {
+	return &jsonRequestParser{
+		dec:         json.NewDecoder(in),
+		unmarshaler: jsonpb.Unmarshaler{AnyResolver: resolver},
+	}
+}
+
+// NewJSONRequestParserWithUnmarshaler is like NewJSONRequestParser but
+// accepts a protobuf jsonpb.Unmarshaler instead of jsonpb.AnyResolver.
+func NewJSONRequestParserWithUnmarshaler(in io.Reader, unmarshaler jsonpb.Unmarshaler) RequestParser {
+	return &jsonRequestParser{
+		dec:         json.NewDecoder(in),
+		unmarshaler: unmarshaler,
+	}
+}
+
+func (f *jsonRequestParser) Next(m proto.Message) error {
+	var msg json.RawMessage
+	if err := f.dec.Decode(&msg); err != nil {
+		return err
+	}
+	f.requestCount++
+	return f.unmarshaler.Unmarshal(bytes.NewReader(msg), m)
+}
+
+func (f *jsonRequestParser) NumRequests() int {
+	return f.requestCount
+}
+
+const (
+	textSeparatorChar = '\x1e'
+)
+
+type textRequestParser struct {
+	r            *bufio.Reader
+	err          error
+	requestCount int
+}
+
+// NewTextRequestParser returns a RequestParser that reads data in the protobuf
+// text format from the given reader.
+//
+// Input data that contains more than one message should include an ASCII
+// 'Record Separator' character (0x1E) between each message.
+//
+// Empty text is a valid text format and represents an empty message. So if the
+// given reader has no data, the returned parser will yield an empty message
+// for the first call to Next and then return io.EOF thereafter. This also means
+// that if the input data ends with a record separator, then a final empty
+// message will be parsed *after* the separator.
+func NewTextRequestParser(in io.Reader) RequestParser {
+	return &textRequestParser{r: bufio.NewReader(in)}
+}
+
+func (f *textRequestParser) Next(m proto.Message) error {
+	if f.err != nil {
+		return f.err
+	}
+
+	var b []byte
+	b, f.err = f.r.ReadBytes(textSeparatorChar)
+	if f.err != nil && f.err != io.EOF {
+		return f.err
+	}
+	// remove delimiter
+	if len(b) > 0 && b[len(b)-1] == textSeparatorChar {
+		b = b[:len(b)-1]
+	}
+
+	f.requestCount++
+
+	return proto.UnmarshalText(string(b), m)
+}
+
+func (f *textRequestParser) NumRequests() int {
+	return f.requestCount
+}
+
+// Formatter translates messages into string representations.
+type Formatter func(proto.Message) (string, error)
+
+// NewJSONFormatter returns a formatter that returns JSON strings. The JSON will
+// include empty/default values (instead of just omitted them) if emitDefaults
+// is true. The given resolver is used to assist with encoding of
+// google.protobuf.Any messages.
+func NewJSONFormatter(emitDefaults bool, resolver jsonpb.AnyResolver) Formatter {
+	marshaler := jsonpb.Marshaler{
+		EmitDefaults: emitDefaults,
+		Indent:       "  ",
+		AnyResolver:  resolver,
+	}
+	return marshaler.MarshalToString
+}
+
+// NewTextFormatter returns a formatter that returns strings in the protobuf
+// text format. If includeSeparator is true then, when invoked to format
+// multiple messages, all messages after the first one will be prefixed with the
+// ASCII 'Record Separator' character (0x1E).
+func NewTextFormatter(includeSeparator bool) Formatter {
+	tf := textFormatter{useSeparator: includeSeparator}
+	return tf.format
+}
+
+type textFormatter struct {
+	useSeparator bool
+	numFormatted int
+}
+
+var protoTextMarshaler = proto.TextMarshaler{ExpandAny: true}
+
+func (tf *textFormatter) format(m proto.Message) (string, error) {
+	var buf bytes.Buffer
+	if tf.useSeparator && tf.numFormatted > 0 {
+		if err := buf.WriteByte(textSeparatorChar); err != nil {
+			return "", err
+		}
+	}
+
+	// If message implements MarshalText method (such as a *dynamic.Message),
+	// it won't get details about whether or not to format to text compactly
+	// or with indentation. So first see if the message also implements a
+	// MarshalTextIndent method and use that instead if available.
+	type indentMarshaler interface {
+		MarshalTextIndent() ([]byte, error)
+	}
+
+	if indenter, ok := m.(indentMarshaler); ok {
+		b, err := indenter.MarshalTextIndent()
+		if err != nil {
+			return "", err
+		}
+		if _, err := buf.Write(b); err != nil {
+			return "", err
+		}
+	} else if err := protoTextMarshaler.Marshal(&buf, m); err != nil {
+		return "", err
+	}
+
+	// no trailing newline needed
+	str := buf.String()
+	if len(str) > 0 && str[len(str)-1] == '\n' {
+		str = str[:len(str)-1]
+	}
+
+	tf.numFormatted++
+
+	return str, nil
+}
+
+type Format string
+
+const (
+	FormatJSON = Format("json")
+	FormatText = Format("text")
+)
+
+// AnyResolverFromDescriptorSource returns an AnyResolver that will search for
+// types using the given descriptor source.
+func AnyResolverFromDescriptorSource(source DescriptorSource) jsonpb.AnyResolver {
+	return &anyResolver{source: source}
+}
+
+// AnyResolverFromDescriptorSourceWithFallback returns an AnyResolver that will
+// search for types using the given descriptor source and then fallback to a
+// special message if the type is not found. The fallback type will render to
+// JSON with a "@type" property, just like an Any message, but also with a
+// custom "@value" property that includes the binary encoded payload.
+func AnyResolverFromDescriptorSourceWithFallback(source DescriptorSource) jsonpb.AnyResolver {
+	res := anyResolver{source: source}
+	return &anyResolverWithFallback{AnyResolver: &res}
+}
+
+type anyResolver struct {
+	source DescriptorSource
+
+	er dynamic.ExtensionRegistry
+
+	mu       sync.RWMutex
+	mf       *dynamic.MessageFactory
+	resolved map[string]func() proto.Message
+}
+
+func (r *anyResolver) Resolve(typeUrl string) (proto.Message, error) {
+	mname := typeUrl
+	if slash := strings.LastIndex(mname, "/"); slash >= 0 {
+		mname = mname[slash+1:]
+	}
+
+	r.mu.RLock()
+	factory := r.resolved[mname]
+	r.mu.RUnlock()
+
+	// already resolved?
+	if factory != nil {
+		return factory(), nil
+	}
+
+	r.mu.Lock()
+	defer r.mu.Unlock()
+
+	// double-check, in case we were racing with another goroutine
+	// that resolved this one
+	factory = r.resolved[mname]
+	if factory != nil {
+		return factory(), nil
+	}
+
+	// use descriptor source to resolve message type
+	d, err := r.source.FindSymbol(mname)
+	if err != nil {
+		return nil, err
+	}
+	md, ok := d.(*desc.MessageDescriptor)
+	if !ok {
+		return nil, fmt.Errorf("unknown message: %s", typeUrl)
+	}
+	// populate any extensions for this message, too
+	if exts, err := r.source.AllExtensionsForType(mname); err != nil {
+		return nil, err
+	} else if err := r.er.AddExtension(exts...); err != nil {
+		return nil, err
+	}
+
+	if r.mf == nil {
+		r.mf = dynamic.NewMessageFactoryWithExtensionRegistry(&r.er)
+	}
+
+	factory = func() proto.Message {
+		return r.mf.NewMessage(md)
+	}
+	if r.resolved == nil {
+		r.resolved = map[string]func() proto.Message{}
+	}
+	r.resolved[mname] = factory
+	return factory(), nil
+}
+
+// anyResolverWithFallback can provide a fallback value for unknown
+// messages that will format itself to JSON using an "@value" field
+// that has the base64-encoded data for the unknown message value.
+type anyResolverWithFallback struct {
+	jsonpb.AnyResolver
+}
+
+func (r anyResolverWithFallback) Resolve(typeUrl string) (proto.Message, error) {
+	msg, err := r.AnyResolver.Resolve(typeUrl)
+	if err == nil {
+		return msg, err
+	}
+
+	// Try "default" resolution logic. This mirrors the default behavior
+	// of jsonpb, which checks to see if the given message name is registered
+	// in the proto package.
+	mname := typeUrl
+	if slash := strings.LastIndex(mname, "/"); slash >= 0 {
+		mname = mname[slash+1:]
+	}
+	//lint:ignore SA1019 new non-deprecated API requires other code changes; deferring...
+	mt := proto.MessageType(mname)
+	if mt != nil {
+		return reflect.New(mt.Elem()).Interface().(proto.Message), nil
+	}
+
+	// finally, fallback to a special placeholder that can marshal itself
+	// to JSON using a special "@value" property to show base64-encoded
+	// data for the embedded message
+	return &unknownAny{TypeUrl: typeUrl, Error: fmt.Sprintf("%s is not recognized; see @value for raw binary message data", mname)}, nil
+}
+
+type unknownAny struct {
+	TypeUrl string `json:"@type"`
+	Error   string `json:"@error"`
+	Value   string `json:"@value"`
+}
+
+func (a *unknownAny) MarshalJSONPB(jsm *jsonpb.Marshaler) ([]byte, error) {
+	if jsm.Indent != "" {
+		return json.MarshalIndent(a, "", jsm.Indent)
+	}
+	return json.Marshal(a)
+}
+
+func (a *unknownAny) Unmarshal(b []byte) error {
+	a.Value = base64.StdEncoding.EncodeToString(b)
+	return nil
+}
+
+func (a *unknownAny) Reset() {
+	a.Value = ""
+}
+
+func (a *unknownAny) String() string {
+	b, err := a.MarshalJSONPB(&jsonpb.Marshaler{})
+	if err != nil {
+		return fmt.Sprintf("ERROR: %v", err.Error())
+	}
+	return string(b)
+}
+
+func (a *unknownAny) ProtoMessage() {
+}
+
+var _ proto.Message = (*unknownAny)(nil)
+
+// FormatOptions is a set of flags that are passed to a JSON or text formatter.
+type FormatOptions struct {
+	// EmitJSONDefaultFields flag, when true, includes empty/default values in the output.
+	// FormatJSON only flag.
+	EmitJSONDefaultFields bool
+
+	// AllowUnknownFields is an option for the parser. When true,
+	// it accepts input which includes unknown fields. These unknown fields
+	// are skipped instead of returning an error.
+	// FormatJSON only flag.
+	AllowUnknownFields bool
+
+	// IncludeTextSeparator is true then, when invoked to format multiple messages,
+	// all messages after the first one will be prefixed with the
+	// ASCII 'Record Separator' character (0x1E).
+	// It might be useful when the output is piped to another grpcurl process.
+	// FormatText only flag.
+	IncludeTextSeparator bool
+}
+
+// RequestParserAndFormatter returns a request parser and formatter for the
+// given format. The given descriptor source may be used for parsing message
+// data (if needed by the format).
+// It accepts a set of options. The field EmitJSONDefaultFields and IncludeTextSeparator
+// are options for JSON and protobuf text formats, respectively. The AllowUnknownFields field
+// is a JSON-only format flag.
+// Requests will be parsed from the given in.
+func RequestParserAndFormatter(format Format, descSource DescriptorSource, in io.Reader, opts FormatOptions) (RequestParser, Formatter, error) {
+	switch format {
+	case FormatJSON:
+		resolver := AnyResolverFromDescriptorSource(descSource)
+		unmarshaler := jsonpb.Unmarshaler{AnyResolver: resolver, AllowUnknownFields: opts.AllowUnknownFields}
+		return NewJSONRequestParserWithUnmarshaler(in, unmarshaler), NewJSONFormatter(opts.EmitJSONDefaultFields, anyResolverWithFallback{AnyResolver: resolver}), nil
+	case FormatText:
+		return NewTextRequestParser(in), NewTextFormatter(opts.IncludeTextSeparator), nil
+	default:
+		return nil, nil, fmt.Errorf("unknown format: %s", format)
+	}
+}
+
+// RequestParserAndFormatterFor returns a request parser and formatter for the
+// given format. The given descriptor source may be used for parsing message
+// data (if needed by the format). The flags emitJSONDefaultFields and
+// includeTextSeparator are options for JSON and protobuf text formats,
+// respectively. Requests will be parsed from the given in.
+// This function is deprecated. Please use RequestParserAndFormatter instead.
+// DEPRECATED
+func RequestParserAndFormatterFor(format Format, descSource DescriptorSource, emitJSONDefaultFields, includeTextSeparator bool, in io.Reader) (RequestParser, Formatter, error) {
+	return RequestParserAndFormatter(format, descSource, in, FormatOptions{
+		EmitJSONDefaultFields: emitJSONDefaultFields,
+		IncludeTextSeparator:  includeTextSeparator,
+	})
+}
+
+// DefaultEventHandler logs events to a writer. This is not thread-safe, but is
+// safe for use with InvokeRPC as long as NumResponses and Status are not read
+// until the call to InvokeRPC completes.
+type DefaultEventHandler struct {
+	Out       io.Writer
+	Formatter Formatter
+	// 0 = default
+	// 1 = verbose
+	// 2 = very verbose
+	VerbosityLevel int
+
+	// NumResponses is the number of responses that have been received.
+	NumResponses int
+	// Status is the status that was received at the end of an RPC. It is
+	// nil if the RPC is still in progress.
+	Status *status.Status
+}
+
+// NewDefaultEventHandler returns an InvocationEventHandler that logs events to
+// the given output. If verbose is true, all events are logged. Otherwise, only
+// response messages are logged.
+//
+// Deprecated: NewDefaultEventHandler exists for compatability.
+// It doesn't allow fine control over the `VerbosityLevel`
+// and provides only 0 and 1 options (which corresponds to the `verbose` argument).
+// Use DefaultEventHandler{} initializer directly.
+func NewDefaultEventHandler(out io.Writer, descSource DescriptorSource, formatter Formatter, verbose bool) *DefaultEventHandler {
+	verbosityLevel := 0
+	if verbose {
+		verbosityLevel = 1
+	}
+	return &DefaultEventHandler{
+		Out:            out,
+		Formatter:      formatter,
+		VerbosityLevel: verbosityLevel,
+	}
+}
+
+var _ InvocationEventHandler = (*DefaultEventHandler)(nil)
+
+func (h *DefaultEventHandler) OnResolveMethod(md *desc.MethodDescriptor) {
+	if h.VerbosityLevel > 0 {
+		txt, err := GetDescriptorText(md, nil)
+		if err == nil {
+			fmt.Fprintf(h.Out, "\nResolved method descriptor:\n%s\n", txt)
+		}
+	}
+}
+
+func (h *DefaultEventHandler) OnSendHeaders(md metadata.MD) {
+	if h.VerbosityLevel > 0 {
+		fmt.Fprintf(h.Out, "\nRequest metadata to send:\n%s\n", MetadataToString(md))
+	}
+}
+
+func (h *DefaultEventHandler) OnReceiveHeaders(md metadata.MD) {
+	if h.VerbosityLevel > 0 {
+		fmt.Fprintf(h.Out, "\nResponse headers received:\n%s\n", MetadataToString(md))
+	}
+}
+
+func (h *DefaultEventHandler) OnReceiveResponse(resp proto.Message) {
+	h.NumResponses++
+	if h.VerbosityLevel > 1 {
+		fmt.Fprintf(h.Out, "\nEstimated response size: %d bytes\n", proto.Size(resp))
+	}
+	if h.VerbosityLevel > 0 {
+		fmt.Fprint(h.Out, "\nResponse contents:\n")
+	}
+	if respStr, err := h.Formatter(resp); err != nil {
+		fmt.Fprintf(h.Out, "Failed to format response message %d: %v\n", h.NumResponses, err)
+	} else {
+		fmt.Fprintln(h.Out, respStr)
+	}
+}
+
+func (h *DefaultEventHandler) OnReceiveTrailers(stat *status.Status, md metadata.MD) {
+	h.Status = stat
+	if h.VerbosityLevel > 0 {
+		fmt.Fprintf(h.Out, "\nResponse trailers received:\n%s\n", MetadataToString(md))
+	}
+}
+
+// PrintStatus prints details about the given status to the given writer. The given
+// formatter is used to print any detail messages that may be included in the status.
+// If the given status has a code of OK, "OK" is printed and that is all. Otherwise,
+// "ERROR:" is printed along with a line showing the code, one showing the message
+// string, and each detail message if any are present. The detail messages will be
+// printed as proto text format or JSON, depending on the given formatter.
+func PrintStatus(w io.Writer, stat *status.Status, formatter Formatter) {
+	if stat.Code() == codes.OK {
+		fmt.Fprintln(w, "OK")
+		return
+	}
+	fmt.Fprintf(w, "ERROR:\n  Code: %s\n  Message: %s\n", stat.Code().String(), stat.Message())
+
+	statpb := stat.Proto()
+	if len(statpb.Details) > 0 {
+		fmt.Fprintf(w, "  Details:\n")
+		for i, det := range statpb.Details {
+			prefix := fmt.Sprintf("  %d)", i+1)
+			fmt.Fprintf(w, "%s\t", prefix)
+			prefix = strings.Repeat(" ", len(prefix)) + "\t"
+
+			output, err := formatter(det)
+			if err != nil {
+				fmt.Fprintf(w, "Error parsing detail message: %v\n", err)
+			} else {
+				lines := strings.Split(output, "\n")
+				for i, line := range lines {
+					if i == 0 {
+						// first line is already indented
+						fmt.Fprintf(w, "%s\n", line)
+					} else {
+						fmt.Fprintf(w, "%s%s\n", prefix, line)
+					}
+				}
+			}
+		}
+	}
+}

format_test.go

@@ -0,0 +1,309 @@
+package grpcurl
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"strings"
+	"testing"
+
+	"github.com/golang/protobuf/jsonpb" //lint:ignore SA1019 we have to import this because it appears in exported API
+	"github.com/golang/protobuf/proto"  //lint:ignore SA1019 we have to import this because it appears in exported API
+	"github.com/jhump/protoreflect/desc"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/protobuf/types/known/structpb"
+)
+
+func TestRequestParser(t *testing.T) {
+	source, err := DescriptorSourceFromProtoSets("internal/testing/example.protoset")
+	if err != nil {
+		t.Fatalf("failed to create descriptor source: %v", err)
+	}
+
+	msg, err := makeProto()
+	if err != nil {
+		t.Fatalf("failed to create message: %v", err)
+	}
+
+	testCases := []struct {
+		format         Format
+		input          string
+		expectedOutput []proto.Message
+	}{
+		{
+			format: FormatJSON,
+			input:  "",
+		},
+		{
+			format:         FormatJSON,
+			input:          messageAsJSON,
+			expectedOutput: []proto.Message{msg},
+		},
+		{
+			format:         FormatJSON,
+			input:          messageAsJSON + messageAsJSON + messageAsJSON,
+			expectedOutput: []proto.Message{msg, msg, msg},
+		},
+		{
+			// unlike JSON, empty input yields one empty message (vs. zero messages)
+			format:         FormatText,
+			input:          "",
+			expectedOutput: []proto.Message{&structpb.Value{}},
+		},
+		{
+			format:         FormatText,
+			input:          messageAsText,
+			expectedOutput: []proto.Message{msg},
+		},
+		{
+			format:         FormatText,
+			input:          messageAsText + string(textSeparatorChar),
+			expectedOutput: []proto.Message{msg, &structpb.Value{}},
+		},
+		{
+			format:         FormatText,
+			input:          messageAsText + string(textSeparatorChar) + messageAsText + string(textSeparatorChar) + messageAsText,
+			expectedOutput: []proto.Message{msg, msg, msg},
+		},
+	}
+
+	for i, tc := range testCases {
+		name := fmt.Sprintf("#%d, %s, %d message(s)", i+1, tc.format, len(tc.expectedOutput))
+		rf, _, err := RequestParserAndFormatter(tc.format, source, strings.NewReader(tc.input), FormatOptions{})
+		if err != nil {
+			t.Errorf("Failed to create parser and formatter: %v", err)
+			continue
+		}
+		numReqs := 0
+		for {
+			var req structpb.Value
+			err := rf.Next(&req)
+			if err == io.EOF {
+				break
+			} else if err != nil {
+				t.Errorf("%s, msg %d: unexpected error: %v", name, numReqs, err)
+			}
+			if !proto.Equal(&req, tc.expectedOutput[numReqs]) {
+				t.Errorf("%s, msg %d: incorrect message;\nexpecting:\n%v\ngot:\n%v", name, numReqs, tc.expectedOutput[numReqs], &req)
+			}
+			numReqs++
+		}
+		if rf.NumRequests() != numReqs {
+			t.Errorf("%s: factory reported wrong number of requests: expecting %d, got %d", name, numReqs, rf.NumRequests())
+		}
+	}
+}
+
+// Handler prints response data (and headers/trailers in verbose mode).
+// This verifies that we get the right output in both JSON and proto text modes.
+func TestHandler(t *testing.T) {
+	source, err := DescriptorSourceFromProtoSets("internal/testing/example.protoset")
+	if err != nil {
+		t.Fatalf("failed to create descriptor source: %v", err)
+	}
+	d, err := source.FindSymbol("TestService.GetFiles")
+	if err != nil {
+		t.Fatalf("failed to find method 'TestService.GetFiles': %v", err)
+	}
+	md, ok := d.(*desc.MethodDescriptor)
+	if !ok {
+		t.Fatalf("wrong kind of descriptor found: %T", d)
+	}
+
+	reqHeaders := metadata.Pairs("foo", "123", "bar", "456")
+	respHeaders := metadata.Pairs("foo", "abc", "bar", "def", "baz", "xyz")
+	respTrailers := metadata.Pairs("a", "1", "b", "2", "c", "3")
+	rsp, err := makeProto()
+	if err != nil {
+		t.Fatalf("failed to create response message: %v", err)
+	}
+
+	for _, format := range []Format{FormatJSON, FormatText} {
+		for _, numMessages := range []int{1, 3} {
+			for verbosityLevel := 0; verbosityLevel <= 2; verbosityLevel++ {
+				name := fmt.Sprintf("%s, %d message(s)", format, numMessages)
+				if verbosityLevel > 0 {
+					name += fmt.Sprintf(", verbosityLevel=%d", verbosityLevel)
+				}
+
+				verbose := verbosityLevel > 0
+
+				_, formatter, err := RequestParserAndFormatter(format, source, nil, FormatOptions{IncludeTextSeparator: !verbose})
+				if err != nil {
+					t.Errorf("Failed to create parser and formatter: %v", err)
+					continue
+				}
+
+				var buf bytes.Buffer
+				h := &DefaultEventHandler{
+					Out:            &buf,
+					Formatter:      formatter,
+					VerbosityLevel: verbosityLevel,
+				}
+
+				h.OnResolveMethod(md)
+				h.OnSendHeaders(reqHeaders)
+				h.OnReceiveHeaders(respHeaders)
+				for i := 0; i < numMessages; i++ {
+					h.OnReceiveResponse(rsp)
+				}
+				h.OnReceiveTrailers(nil, respTrailers)
+
+				expectedOutput := ""
+				if verbose {
+					expectedOutput += verbosePrefix
+				}
+				for i := 0; i < numMessages; i++ {
+					if verbosityLevel > 1 {
+						expectedOutput += verboseResponseSize
+					}
+					if verbose {
+						expectedOutput += verboseResponseHeader
+					}
+					if format == "json" {
+						expectedOutput += messageAsJSON
+					} else {
+						if i > 0 && !verbose {
+							expectedOutput += string(textSeparatorChar)
+						}
+						expectedOutput += messageAsText
+					}
+				}
+				if verbose {
+					expectedOutput += verboseSuffix
+				}
+
+				out := buf.String()
+				if !compare(out, expectedOutput) {
+					t.Errorf("%s: Incorrect output. Expected:\n%s\nGot:\n%s", name, expectedOutput, out)
+				}
+			}
+		}
+	}
+}
+
+// compare checks that actual and expected are equal, returning true if so.
+// A simple equality check (==) does not suffice because jsonpb formats
+// structpb.Value strangely. So if that formatting gets fixed, we don't
+// want this test in grpcurl to suddenly start failing. So we check each
+// line and compare the lines after stripping whitespace (which removes
+// the jsonpb format anomalies).
+func compare(actual, expected string) bool {
+	actualLines := strings.Split(actual, "\n")
+	expectedLines := strings.Split(expected, "\n")
+	if len(actualLines) != len(expectedLines) {
+		return false
+	}
+	for i := 0; i < len(actualLines); i++ {
+		if strings.TrimSpace(actualLines[i]) != strings.TrimSpace(expectedLines[i]) {
+			return false
+		}
+	}
+	return true
+}
+
+func makeProto() (proto.Message, error) {
+	var rsp structpb.Value
+	err := jsonpb.UnmarshalString(`{
+		"foo": ["abc", "def", "ghi"],
+		"bar": { "a": 1, "b": 2 },
+		"baz": true,
+		"null": null
+	}`, &rsp)
+	if err != nil {
+		return nil, err
+	}
+	return &rsp, nil
+}
+
+var (
+	verbosePrefix = `
+Resolved method descriptor:
+rpc GetFiles ( .TestRequest ) returns ( .TestResponse );
+
+Request metadata to send:
+bar: 456
+foo: 123
+
+Response headers received:
+bar: def
+baz: xyz
+foo: abc
+`
+	verboseSuffix = `
+Response trailers received:
+a: 1
+b: 2
+c: 3
+`
+	verboseResponseSize = `
+Estimated response size: 100 bytes
+`
+	verboseResponseHeader = `
+Response contents:
+`
+	messageAsJSON = `{
+  "bar": {
+    "a": 1,
+    "b": 2
+  },
+  "baz": true,
+  "foo": [
+    "abc",
+    "def",
+    "ghi"
+  ],
+  "null": null
+}
+`
+	messageAsText = `struct_value: <
+  fields: <
+    key: "bar"
+    value: <
+      struct_value: <
+        fields: <
+          key: "a"
+          value: <
+            number_value: 1
+          >
+        >
+        fields: <
+          key: "b"
+          value: <
+            number_value: 2
+          >
+        >
+      >
+    >
+  >
+  fields: <
+    key: "baz"
+    value: <
+      bool_value: true
+    >
+  >
+  fields: <
+    key: "foo"
+    value: <
+      list_value: <
+        values: <
+          string_value: "abc"
+        >
+        values: <
+          string_value: "def"
+        >
+        values: <
+          string_value: "ghi"
+        >
+      >
+    >
+  >
+  fields: <
+    key: "null"
+    value: <
+      null_value: NULL_VALUE
+    >
+  >
+>
+`
+)

go.mod

@@ -1,8 +1,16 @@
 module github.com/fullstorydev/grpcurl
 
+go 1.13
+
 require (
-	github.com/golang/protobuf v1.1.0
-	github.com/jhump/protoreflect v1.0.0
-	golang.org/x/net v0.0.0-20180530234432-1e491301e022
-	google.golang.org/grpc v1.12.0
+	github.com/golang/protobuf v1.4.2
+	github.com/gordonklaus/ineffassign v0.0.0-20200309095847-7953dde2c7bf // indirect
+	github.com/goreleaser/goreleaser v0.134.0 // indirect
+	github.com/jhump/protoreflect v1.8.2
+	github.com/nishanths/predeclared v0.0.0-20200524104333-86fad755b4d3 // indirect
+	golang.org/x/net v0.0.0-20200625001655-4c5254603344
+	google.golang.org/api v0.29.0 // indirect
+	google.golang.org/grpc v1.37.0
+	google.golang.org/protobuf v1.25.1-0.20200805231151-a709e31e5d12
+	honnef.co/go/tools v0.0.1-2020.1.4 // indirect
 )

go.sum

@@ -1,13 +1,632 @@
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-golang.org/x/net v0.0.0-20180530234432-1e491301e022/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
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+google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
+google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
+google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
+google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
+google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
+google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
+google.golang.org/protobuf v1.25.1-0.20200805231151-a709e31e5d12 h1:OwhZOOMuf7leLaSCuxtQ9FW7ui2L2L6UKOtKAUqovUQ=
+google.golang.org/protobuf v1.25.1-0.20200805231151-a709e31e5d12/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
+gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+honnef.co/go/tools v0.0.1-2020.1.3 h1:sXmLre5bzIR6ypkjXCDI3jHPssRhc8KD/Ome589sc3U=
+honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+honnef.co/go/tools v0.0.1-2020.1.4 h1:UoveltGrhghAA7ePc+e+QYDHXrBps2PqFZiHkGR/xK8=
+honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+pack.ag/amqp v0.11.2/go.mod h1:4/cbmt4EJXSKlG6LCfWHoqmN0uFdy5i/+YFz+fTfhV4=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
+rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
+rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=

grpcurl_test.go

@@ -1,6 +1,8 @@
 package grpcurl_test
 
 import (
+	"context"
+	"encoding/json"
 	"fmt"
 	"io"
 	"net"
@@ -10,21 +12,20 @@ import (
 	"testing"
 	"time"
 
-	"github.com/golang/protobuf/jsonpb"
-	"github.com/golang/protobuf/proto"
+	"github.com/golang/protobuf/jsonpb" //lint:ignore SA1019 we have to import this because it appears in exported API
+	"github.com/golang/protobuf/proto"  //lint:ignore SA1019 we have to import this because it appears in exported API
 	"github.com/jhump/protoreflect/desc"
 	"github.com/jhump/protoreflect/grpcreflect"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
-	"google.golang.org/grpc/interop/grpc_testing"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/reflection"
 	reflectpb "google.golang.org/grpc/reflection/grpc_reflection_v1alpha"
 	"google.golang.org/grpc/status"
 
 	. "github.com/fullstorydev/grpcurl"
-	grpcurl_testing "github.com/fullstorydev/grpcurl/testing"
+	grpcurl_testing "github.com/fullstorydev/grpcurl/internal/testing"
+	jsonpbtest "github.com/fullstorydev/grpcurl/internal/testing/jsonpb_test_proto"
 )
 
 var (
@@ -44,20 +45,24 @@ type descSourceCase struct {
 	includeRefl bool
 }
 
+// NB: These tests intentionally use the deprecated InvokeRpc since that
+// calls the other (non-deprecated InvokeRPC). That allows the tests to
+// easily exercise both functions.
+
 func TestMain(m *testing.M) {
 	var err error
-	sourceProtoset, err = DescriptorSourceFromProtoSets("testing/test.protoset")
+	sourceProtoset, err = DescriptorSourceFromProtoSets("internal/testing/test.protoset")
 	if err != nil {
 		panic(err)
 	}
-	sourceProtoFiles, err = DescriptorSourceFromProtoFiles(nil, "testing/test.proto")
+	sourceProtoFiles, err = DescriptorSourceFromProtoFiles([]string{"internal/testing"}, "test.proto")
 	if err != nil {
 		panic(err)
 	}
 
 	// Create a server that includes the reflection service
 	svrReflect := grpc.NewServer()
-	grpc_testing.RegisterTestServiceServer(svrReflect, grpcurl_testing.TestServer{})
+	grpcurl_testing.RegisterTestServiceServer(svrReflect, grpcurl_testing.TestServer{})
 	reflection.Register(svrReflect)
 	var portReflect int
 	if l, err := net.Listen("tcp", "127.0.0.1:0"); err != nil {
@@ -83,7 +88,7 @@ func TestMain(m *testing.M) {
 
 	// Also create a server that does *not* include the reflection service
 	svrProtoset := grpc.NewServer()
-	grpc_testing.RegisterTestServiceServer(svrProtoset, grpcurl_testing.TestServer{})
+	grpcurl_testing.RegisterTestServiceServer(svrProtoset, grpcurl_testing.TestServer{})
 	var portProtoset int
 	if l, err := net.Listen("tcp", "127.0.0.1:0"); err != nil {
 		panic(err)
@@ -135,7 +140,7 @@ func TestServerDoesNotSupportReflection(t *testing.T) {
 }
 
 func TestProtosetWithImports(t *testing.T) {
-	sourceProtoset, err := DescriptorSourceFromProtoSets("testing/example.protoset")
+	sourceProtoset, err := DescriptorSourceFromProtoSets("internal/testing/example.protoset")
 	if err != nil {
 		t.Fatalf("failed to load protoset: %v", err)
 	}
@@ -172,11 +177,11 @@ func doTestListServices(t *testing.T, source DescriptorSource, includeReflection
 	var expected []string
 	if includeReflection {
 		// when using server reflection, we see the TestService as well as the ServerReflection service
-		expected = []string{"grpc.reflection.v1alpha.ServerReflection", "grpc.testing.TestService"}
+		expected = []string{"grpc.reflection.v1alpha.ServerReflection", "testing.TestService"}
 	} else {
 		// without reflection, we see all services defined in the same test.proto file, which is the
 		// TestService as well as UnimplementedService
-		expected = []string{"grpc.testing.TestService", "grpc.testing.UnimplementedService"}
+		expected = []string{"testing.TestService", "testing.UnimplementedService"}
 	}
 	if !reflect.DeepEqual(expected, names) {
 		t.Errorf("ListServices returned wrong results: wanted %v, got %v", expected, names)
@@ -192,17 +197,17 @@ func TestListMethods(t *testing.T) {
 }
 
 func doTestListMethods(t *testing.T, source DescriptorSource, includeReflection bool) {
-	names, err := ListMethods(source, "grpc.testing.TestService")
+	names, err := ListMethods(source, "testing.TestService")
 	if err != nil {
 		t.Fatalf("failed to list methods for TestService: %v", err)
 	}
 	expected := []string{
-		"EmptyCall",
-		"FullDuplexCall",
-		"HalfDuplexCall",
-		"StreamingInputCall",
-		"StreamingOutputCall",
-		"UnaryCall",
+		"testing.TestService.EmptyCall",
+		"testing.TestService.FullDuplexCall",
+		"testing.TestService.HalfDuplexCall",
+		"testing.TestService.StreamingInputCall",
+		"testing.TestService.StreamingOutputCall",
+		"testing.TestService.UnaryCall",
 	}
 	if !reflect.DeepEqual(expected, names) {
 		t.Errorf("ListMethods returned wrong results: wanted %v, got %v", expected, names)
@@ -214,15 +219,15 @@ func doTestListMethods(t *testing.T, source DescriptorSource, includeReflection
 		if err != nil {
 			t.Fatalf("failed to list methods for ServerReflection: %v", err)
 		}
-		expected = []string{"ServerReflectionInfo"}
+		expected = []string{"grpc.reflection.v1alpha.ServerReflection.ServerReflectionInfo"}
 	} else {
 		// without reflection, we see all services defined in the same test.proto file, which is the
 		// TestService as well as UnimplementedService
-		names, err = ListMethods(source, "grpc.testing.UnimplementedService")
+		names, err = ListMethods(source, "testing.UnimplementedService")
 		if err != nil {
 			t.Fatalf("failed to list methods for ServerReflection: %v", err)
 		}
-		expected = []string{"UnimplementedCall"}
+		expected = []string{"testing.UnimplementedService.UnimplementedCall"}
 	}
 	if !reflect.DeepEqual(expected, names) {
 		t.Errorf("ListMethods returned wrong results: wanted %v, got %v", expected, names)
@@ -235,6 +240,159 @@ func doTestListMethods(t *testing.T, source DescriptorSource, includeReflection
 	}
 }
 
+func TestGetAllFiles(t *testing.T) {
+	expectedFiles := []string{"test.proto"}
+	// server reflection picks up filename from linked in Go package,
+	// which indicates "grpc_testing/test.proto", not our local copy.
+	expectedFilesWithReflection := [][]string{
+		{"grpc_reflection_v1alpha/reflection.proto", "test.proto"},
+		// depending on the version of grpc, the filenames could be prefixed with "interop/" and "reflection/"
+		{"reflection/grpc_reflection_v1alpha/reflection.proto", "test.proto"},
+	}
+
+	for _, ds := range descSources {
+		t.Run(ds.name, func(t *testing.T) {
+			files, err := GetAllFiles(ds.source)
+			if err != nil {
+				t.Fatalf("failed to get all files: %v", err)
+			}
+			names := fileNames(files)
+			match := false
+			var expected []string
+			if ds.includeRefl {
+				for _, expectedNames := range expectedFilesWithReflection {
+					expected = expectedNames
+					if reflect.DeepEqual(expected, names) {
+						match = true
+						break
+					}
+				}
+			} else {
+				expected = expectedFiles
+				match = reflect.DeepEqual(expected, names)
+			}
+			if !match {
+				t.Errorf("GetAllFiles returned wrong results: wanted %v, got %v", expected, names)
+			}
+		})
+	}
+
+	// try cases with more complicated set of files
+	otherSourceProtoset, err := DescriptorSourceFromProtoSets("internal/testing/test.protoset", "internal/testing/example.protoset")
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	otherSourceProtoFiles, err := DescriptorSourceFromProtoFiles([]string{"internal/testing"}, "test.proto", "example.proto")
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	otherDescSources := []descSourceCase{
+		{"protoset[b]", otherSourceProtoset, false},
+		{"proto[b]", otherSourceProtoFiles, false},
+	}
+	expectedFiles = []string{
+		"example.proto",
+		"example2.proto",
+		"google/protobuf/any.proto",
+		"google/protobuf/descriptor.proto",
+		"google/protobuf/empty.proto",
+		"google/protobuf/timestamp.proto",
+		"test.proto",
+	}
+	for _, ds := range otherDescSources {
+		t.Run(ds.name, func(t *testing.T) {
+			files, err := GetAllFiles(ds.source)
+			if err != nil {
+				t.Fatalf("failed to get all files: %v", err)
+			}
+			names := fileNames(files)
+			if !reflect.DeepEqual(expectedFiles, names) {
+				t.Errorf("GetAllFiles returned wrong results: wanted %v, got %v", expectedFiles, names)
+			}
+		})
+	}
+}
+
+func TestExpandHeaders(t *testing.T) {
+	inHeaders := []string{"key1: ${value}", "key2: bar", "key3: ${woo", "key4: woo}", "key5: ${TEST}",
+		"key6: ${TEST_VAR}", "${TEST}: ${TEST_VAR}", "key8: ${EMPTY}"}
+	os.Setenv("value", "value")
+	os.Setenv("TEST", "value5")
+	os.Setenv("TEST_VAR", "value6")
+	os.Setenv("EMPTY", "")
+	expectedHeaders := map[string]bool{"key1: value": true, "key2: bar": true, "key3: ${woo": true, "key4: woo}": true,
+		"key5: value5": true, "key6: value6": true, "value5: value6": true, "key8: ": true}
+
+	outHeaders, err := ExpandHeaders(inHeaders)
+	if err != nil {
+		t.Errorf("The ExpandHeaders function generated an unexpected error %s", err)
+	}
+	for _, expandedHeader := range outHeaders {
+		if _, ok := expectedHeaders[expandedHeader]; !ok {
+			t.Errorf("The ExpandHeaders function has returned an unexpected header. Received unexpected header %s", expandedHeader)
+		}
+	}
+
+	badHeaders := []string{"key: ${DNE}"}
+	_, err = ExpandHeaders(badHeaders)
+	if err == nil {
+		t.Errorf("The ExpandHeaders function should return an error for missing environment variables %q", badHeaders)
+	}
+}
+
+func fileNames(files []*desc.FileDescriptor) []string {
+	names := make([]string, len(files))
+	for i, f := range files {
+		names[i] = f.GetName()
+	}
+	return names
+}
+
+const expectKnownType = `{
+  "dur": "0s",
+  "ts": "1970-01-01T00:00:00Z",
+  "dbl": 0,
+  "flt": 0,
+  "i64": "0",
+  "u64": "0",
+  "i32": 0,
+  "u32": 0,
+  "bool": false,
+  "str": "",
+  "bytes": null,
+  "st": {"google.protobuf.Struct": "supports arbitrary JSON objects"},
+  "an": {"@type": "type.googleapis.com/google.protobuf.Empty", "value": {}},
+  "lv": [{"google.protobuf.ListValue": "is an array of arbitrary JSON values"}],
+  "val": {"google.protobuf.Value": "supports arbitrary JSON"}
+}`
+
+func TestMakeTemplateKnownTypes(t *testing.T) {
+	descriptor, err := desc.LoadMessageDescriptorForMessage((*jsonpbtest.KnownTypes)(nil))
+	if err != nil {
+		t.Fatalf("failed to load descriptor: %v", err)
+	}
+	message := MakeTemplate(descriptor)
+
+	jsm := jsonpb.Marshaler{EmitDefaults: true}
+	out, err := jsm.MarshalToString(message)
+	if err != nil {
+		t.Fatalf("failed to marshal to JSON: %v", err)
+	}
+
+	// make sure template JSON matches expected
+	var actual, expected interface{}
+	if err := json.Unmarshal([]byte(out), &actual); err != nil {
+		t.Fatalf("failed to parse actual JSON: %v", err)
+	}
+	if err := json.Unmarshal([]byte(expectKnownType), &expected); err != nil {
+		t.Fatalf("failed to parse expected JSON: %v", err)
+	}
+
+	if !reflect.DeepEqual(actual, expected) {
+		t.Errorf("template message is not as expected; want:\n%s\ngot:\n%s", expectKnownType, out)
+	}
+}
+
 func TestDescribe(t *testing.T) {
 	for _, ds := range descSources {
 		t.Run(ds.name, func(t *testing.T) {
@@ -244,7 +402,7 @@ func TestDescribe(t *testing.T) {
 }
 
 func doTestDescribe(t *testing.T, source DescriptorSource) {
-	sym := "grpc.testing.TestService.EmptyCall"
+	sym := "testing.TestService.EmptyCall"
 	dsc, err := source.FindSymbol(sym)
 	if err != nil {
 		t.Fatalf("failed to get descriptor for %q: %v", sym, err)
@@ -255,14 +413,14 @@ func doTestDescribe(t *testing.T, source DescriptorSource) {
 	txt := proto.MarshalTextString(dsc.AsProto())
 	expected :=
 		`name: "EmptyCall"
-input_type: ".grpc.testing.Empty"
-output_type: ".grpc.testing.Empty"
+input_type: ".testing.Empty"
+output_type: ".testing.Empty"
 `
 	if expected != txt {
 		t.Errorf("descriptor mismatch: expected %s, got %s", expected, txt)
 	}
 
-	sym = "grpc.testing.StreamingOutputCallResponse"
+	sym = "testing.StreamingOutputCallResponse"
 	dsc, err = source.FindSymbol(sym)
 	if err != nil {
 		t.Fatalf("failed to get descriptor for %q: %v", sym, err)
@@ -278,7 +436,7 @@ field: <
   number: 1
   label: LABEL_OPTIONAL
   type: TYPE_MESSAGE
-  type_name: ".grpc.testing.Payload"
+  type_name: ".testing.Payload"
   json_name: "payload"
 >
 `
@@ -334,12 +492,12 @@ func TestUnary(t *testing.T) {
 func doTestUnary(t *testing.T, cc *grpc.ClientConn, source DescriptorSource) {
 	// Success
 	h := &handler{reqMessages: []string{payload1}}
-	err := InvokeRpc(context.Background(), source, cc, "grpc.testing.TestService/UnaryCall", makeHeaders(codes.OK), h, h.getRequestData)
+	err := InvokeRpc(context.Background(), source, cc, "testing.TestService/UnaryCall", makeHeaders(codes.OK), h, h.getRequestData)
 	if err != nil {
 		t.Fatalf("unexpected error during RPC: %v", err)
 	}
 
-	if h.check(t, "grpc.testing.TestService.UnaryCall", codes.OK, 1, 1) {
+	if h.check(t, "testing.TestService.UnaryCall", codes.OK, 1, 1) {
 		if h.respMessages[0] != payload1 {
 			t.Errorf("unexpected response from RPC: expecting %s; got %s", payload1, h.respMessages[0])
 		}
@@ -347,12 +505,12 @@ func doTestUnary(t *testing.T, cc *grpc.ClientConn, source DescriptorSource) {
 
 	// Failure
 	h = &handler{reqMessages: []string{payload1}}
-	err = InvokeRpc(context.Background(), source, cc, "grpc.testing.TestService/UnaryCall", makeHeaders(codes.NotFound), h, h.getRequestData)
+	err = InvokeRpc(context.Background(), source, cc, "testing.TestService/UnaryCall", makeHeaders(codes.NotFound), h, h.getRequestData)
 	if err != nil {
 		t.Fatalf("unexpected error during RPC: %v", err)
 	}
 
-	h.check(t, "grpc.testing.TestService.UnaryCall", codes.NotFound, 1, 0)
+	h.check(t, "testing.TestService.UnaryCall", codes.NotFound, 1, 0)
 }
 
 func TestClientStream(t *testing.T) {
@@ -366,12 +524,12 @@ func TestClientStream(t *testing.T) {
 func doTestClientStream(t *testing.T, cc *grpc.ClientConn, source DescriptorSource) {
 	// Success
 	h := &handler{reqMessages: []string{payload1, payload2, payload3}}
-	err := InvokeRpc(context.Background(), source, cc, "grpc.testing.TestService/StreamingInputCall", makeHeaders(codes.OK), h, h.getRequestData)
+	err := InvokeRpc(context.Background(), source, cc, "testing.TestService/StreamingInputCall", makeHeaders(codes.OK), h, h.getRequestData)
 	if err != nil {
 		t.Fatalf("unexpected error during RPC: %v", err)
 	}
 
-	if h.check(t, "grpc.testing.TestService.StreamingInputCall", codes.OK, 3, 1) {
+	if h.check(t, "testing.TestService.StreamingInputCall", codes.OK, 3, 1) {
 		expected :=
 			`{
   "aggregatedPayloadSize": 61
@@ -383,21 +541,21 @@ func doTestClientStream(t *testing.T, cc *grpc.ClientConn, source DescriptorSour
 
 	// Fail fast (server rejects as soon as possible)
 	h = &handler{reqMessages: []string{payload1, payload2, payload3}}
-	err = InvokeRpc(context.Background(), source, cc, "grpc.testing.TestService/StreamingInputCall", makeHeaders(codes.InvalidArgument), h, h.getRequestData)
+	err = InvokeRpc(context.Background(), source, cc, "testing.TestService/StreamingInputCall", makeHeaders(codes.InvalidArgument), h, h.getRequestData)
 	if err != nil {
 		t.Fatalf("unexpected error during RPC: %v", err)
 	}
 
-	h.check(t, "grpc.testing.TestService.StreamingInputCall", codes.InvalidArgument, -3, 0)
+	h.check(t, "testing.TestService.StreamingInputCall", codes.InvalidArgument, -3, 0)
 
 	// Fail late (server waits until stream is complete to reject)
 	h = &handler{reqMessages: []string{payload1, payload2, payload3}}
-	err = InvokeRpc(context.Background(), source, cc, "grpc.testing.TestService/StreamingInputCall", makeHeaders(codes.Internal, true), h, h.getRequestData)
+	err = InvokeRpc(context.Background(), source, cc, "testing.TestService/StreamingInputCall", makeHeaders(codes.Internal, true), h, h.getRequestData)
 	if err != nil {
 		t.Fatalf("unexpected error during RPC: %v", err)
 	}
 
-	h.check(t, "grpc.testing.TestService.StreamingInputCall", codes.Internal, 3, 0)
+	h.check(t, "testing.TestService.StreamingInputCall", codes.Internal, 3, 0)
 }
 
 func TestServerStream(t *testing.T) {
@@ -409,9 +567,9 @@ func TestServerStream(t *testing.T) {
 }
 
 func doTestServerStream(t *testing.T, cc *grpc.ClientConn, source DescriptorSource) {
-	req := &grpc_testing.StreamingOutputCallRequest{
-		ResponseType: grpc_testing.PayloadType_COMPRESSABLE,
-		ResponseParameters: []*grpc_testing.ResponseParameters{
+	req := &grpcurl_testing.StreamingOutputCallRequest{
+		ResponseType: grpcurl_testing.PayloadType_COMPRESSABLE,
+		ResponseParameters: []*grpcurl_testing.ResponseParameters{
 			{Size: 10}, {Size: 20}, {Size: 30}, {Size: 40}, {Size: 50},
 		},
 	}
@@ -422,19 +580,19 @@ func doTestServerStream(t *testing.T, cc *grpc.ClientConn, source DescriptorSour
 
 	// Success
 	h := &handler{reqMessages: []string{payload}}
-	err = InvokeRpc(context.Background(), source, cc, "grpc.testing.TestService/StreamingOutputCall", makeHeaders(codes.OK), h, h.getRequestData)
+	err = InvokeRpc(context.Background(), source, cc, "testing.TestService/StreamingOutputCall", makeHeaders(codes.OK), h, h.getRequestData)
 	if err != nil {
 		t.Fatalf("unexpected error during RPC: %v", err)
 	}
 
-	if h.check(t, "grpc.testing.TestService.StreamingOutputCall", codes.OK, 1, 5) {
-		resp := &grpc_testing.StreamingOutputCallResponse{}
+	if h.check(t, "testing.TestService.StreamingOutputCall", codes.OK, 1, 5) {
+		resp := &grpcurl_testing.StreamingOutputCallResponse{}
 		for i, msg := range h.respMessages {
 			if err := jsonpb.UnmarshalString(msg, resp); err != nil {
 				t.Errorf("failed to parse response %d: %v", i+1, err)
 			}
-			if resp.Payload.GetType() != grpc_testing.PayloadType_COMPRESSABLE {
-				t.Errorf("response %d has wrong payload type; expecting %v, got %v", i, grpc_testing.PayloadType_COMPRESSABLE, resp.Payload.Type)
+			if resp.Payload.GetType() != grpcurl_testing.PayloadType_COMPRESSABLE {
+				t.Errorf("response %d has wrong payload type; expecting %v, got %v", i, grpcurl_testing.PayloadType_COMPRESSABLE, resp.Payload.Type)
 			}
 			if len(resp.Payload.Body) != (i+1)*10 {
 				t.Errorf("response %d has wrong payload size; expecting %d, got %d", i, (i+1)*10, len(resp.Payload.Body))
@@ -445,21 +603,21 @@ func doTestServerStream(t *testing.T, cc *grpc.ClientConn, source DescriptorSour
 
 	// Fail fast (server rejects as soon as possible)
 	h = &handler{reqMessages: []string{payload}}
-	err = InvokeRpc(context.Background(), source, cc, "grpc.testing.TestService/StreamingOutputCall", makeHeaders(codes.Aborted), h, h.getRequestData)
+	err = InvokeRpc(context.Background(), source, cc, "testing.TestService/StreamingOutputCall", makeHeaders(codes.Aborted), h, h.getRequestData)
 	if err != nil {
 		t.Fatalf("unexpected error during RPC: %v", err)
 	}
 
-	h.check(t, "grpc.testing.TestService.StreamingOutputCall", codes.Aborted, 1, 0)
+	h.check(t, "testing.TestService.StreamingOutputCall", codes.Aborted, 1, 0)
 
 	// Fail late (server waits until stream is complete to reject)
 	h = &handler{reqMessages: []string{payload}}
-	err = InvokeRpc(context.Background(), source, cc, "grpc.testing.TestService/StreamingOutputCall", makeHeaders(codes.AlreadyExists, true), h, h.getRequestData)
+	err = InvokeRpc(context.Background(), source, cc, "testing.TestService/StreamingOutputCall", makeHeaders(codes.AlreadyExists, true), h, h.getRequestData)
 	if err != nil {
 		t.Fatalf("unexpected error during RPC: %v", err)
 	}
 
-	h.check(t, "grpc.testing.TestService.StreamingOutputCall", codes.AlreadyExists, 1, 5)
+	h.check(t, "testing.TestService.StreamingOutputCall", codes.AlreadyExists, 1, 5)
 }
 
 func TestHalfDuplexStream(t *testing.T) {
@@ -475,12 +633,12 @@ func doTestHalfDuplexStream(t *testing.T, cc *grpc.ClientConn, source Descriptor
 
 	// Success
 	h := &handler{reqMessages: reqs}
-	err := InvokeRpc(context.Background(), source, cc, "grpc.testing.TestService/HalfDuplexCall", makeHeaders(codes.OK), h, h.getRequestData)
+	err := InvokeRpc(context.Background(), source, cc, "testing.TestService/HalfDuplexCall", makeHeaders(codes.OK), h, h.getRequestData)
 	if err != nil {
 		t.Fatalf("unexpected error during RPC: %v", err)
 	}
 
-	if h.check(t, "grpc.testing.TestService.HalfDuplexCall", codes.OK, 3, 3) {
+	if h.check(t, "testing.TestService.HalfDuplexCall", codes.OK, 3, 3) {
 		for i, resp := range h.respMessages {
 			if resp != reqs[i] {
 				t.Errorf("unexpected response %d from RPC:\nexpecting %q\ngot %q", i, reqs[i], resp)
@@ -490,21 +648,21 @@ func doTestHalfDuplexStream(t *testing.T, cc *grpc.ClientConn, source Descriptor
 
 	// Fail fast (server rejects as soon as possible)
 	h = &handler{reqMessages: reqs}
-	err = InvokeRpc(context.Background(), source, cc, "grpc.testing.TestService/HalfDuplexCall", makeHeaders(codes.Canceled), h, h.getRequestData)
+	err = InvokeRpc(context.Background(), source, cc, "testing.TestService/HalfDuplexCall", makeHeaders(codes.Canceled), h, h.getRequestData)
 	if err != nil {
 		t.Fatalf("unexpected error during RPC: %v", err)
 	}
 
-	h.check(t, "grpc.testing.TestService.HalfDuplexCall", codes.Canceled, -3, 0)
+	h.check(t, "testing.TestService.HalfDuplexCall", codes.Canceled, -3, 0)
 
 	// Fail late (server waits until stream is complete to reject)
 	h = &handler{reqMessages: reqs}
-	err = InvokeRpc(context.Background(), source, cc, "grpc.testing.TestService/HalfDuplexCall", makeHeaders(codes.DataLoss, true), h, h.getRequestData)
+	err = InvokeRpc(context.Background(), source, cc, "testing.TestService/HalfDuplexCall", makeHeaders(codes.DataLoss, true), h, h.getRequestData)
 	if err != nil {
 		t.Fatalf("unexpected error during RPC: %v", err)
 	}
 
-	h.check(t, "grpc.testing.TestService.HalfDuplexCall", codes.DataLoss, 3, 3)
+	h.check(t, "testing.TestService.HalfDuplexCall", codes.DataLoss, 3, 3)
 }
 
 func TestFullDuplexStream(t *testing.T) {
@@ -517,11 +675,11 @@ func TestFullDuplexStream(t *testing.T) {
 
 func doTestFullDuplexStream(t *testing.T, cc *grpc.ClientConn, source DescriptorSource) {
 	reqs := make([]string, 3)
-	req := &grpc_testing.StreamingOutputCallRequest{
-		ResponseType: grpc_testing.PayloadType_RANDOM,
+	req := &grpcurl_testing.StreamingOutputCallRequest{
+		ResponseType: grpcurl_testing.PayloadType_RANDOM,
 	}
 	for i := range reqs {
-		req.ResponseParameters = append(req.ResponseParameters, &grpc_testing.ResponseParameters{Size: int32((i + 1) * 10)})
+		req.ResponseParameters = append(req.ResponseParameters, &grpcurl_testing.ResponseParameters{Size: int32((i + 1) * 10)})
 		payload, err := (&jsonpb.Marshaler{}).MarshalToString(req)
 		if err != nil {
 			t.Fatalf("failed to construct request %d: %v", i, err)
@@ -531,13 +689,13 @@ func doTestFullDuplexStream(t *testing.T, cc *grpc.ClientConn, source Descriptor
 
 	// Success
 	h := &handler{reqMessages: reqs}
-	err := InvokeRpc(context.Background(), source, cc, "grpc.testing.TestService/FullDuplexCall", makeHeaders(codes.OK), h, h.getRequestData)
+	err := InvokeRpc(context.Background(), source, cc, "testing.TestService/FullDuplexCall", makeHeaders(codes.OK), h, h.getRequestData)
 	if err != nil {
 		t.Fatalf("unexpected error during RPC: %v", err)
 	}
 
-	if h.check(t, "grpc.testing.TestService.FullDuplexCall", codes.OK, 3, 6) {
-		resp := &grpc_testing.StreamingOutputCallResponse{}
+	if h.check(t, "testing.TestService.FullDuplexCall", codes.OK, 3, 6) {
+		resp := &grpcurl_testing.StreamingOutputCallResponse{}
 		i := 0
 		for j := 1; j < 3; j++ {
 			// three requests
@@ -547,8 +705,8 @@ func doTestFullDuplexStream(t *testing.T, cc *grpc.ClientConn, source Descriptor
 				if err := jsonpb.UnmarshalString(msg, resp); err != nil {
 					t.Errorf("failed to parse response %d: %v", i+1, err)
 				}
-				if resp.Payload.GetType() != grpc_testing.PayloadType_RANDOM {
-					t.Errorf("response %d has wrong payload type; expecting %v, got %v", i, grpc_testing.PayloadType_RANDOM, resp.Payload.Type)
+				if resp.Payload.GetType() != grpcurl_testing.PayloadType_RANDOM {
+					t.Errorf("response %d has wrong payload type; expecting %v, got %v", i, grpcurl_testing.PayloadType_RANDOM, resp.Payload.Type)
 				}
 				if len(resp.Payload.Body) != (k+1)*10 {
 					t.Errorf("response %d has wrong payload size; expecting %d, got %d", i, (k+1)*10, len(resp.Payload.Body))
@@ -562,21 +720,21 @@ func doTestFullDuplexStream(t *testing.T, cc *grpc.ClientConn, source Descriptor
 
 	// Fail fast (server rejects as soon as possible)
 	h = &handler{reqMessages: reqs}
-	err = InvokeRpc(context.Background(), source, cc, "grpc.testing.TestService/FullDuplexCall", makeHeaders(codes.PermissionDenied), h, h.getRequestData)
+	err = InvokeRpc(context.Background(), source, cc, "testing.TestService/FullDuplexCall", makeHeaders(codes.PermissionDenied), h, h.getRequestData)
 	if err != nil {
 		t.Fatalf("unexpected error during RPC: %v", err)
 	}
 
-	h.check(t, "grpc.testing.TestService.FullDuplexCall", codes.PermissionDenied, -3, 0)
+	h.check(t, "testing.TestService.FullDuplexCall", codes.PermissionDenied, -3, 0)
 
 	// Fail late (server waits until stream is complete to reject)
 	h = &handler{reqMessages: reqs}
-	err = InvokeRpc(context.Background(), source, cc, "grpc.testing.TestService/FullDuplexCall", makeHeaders(codes.ResourceExhausted, true), h, h.getRequestData)
+	err = InvokeRpc(context.Background(), source, cc, "testing.TestService/FullDuplexCall", makeHeaders(codes.ResourceExhausted, true), h, h.getRequestData)
 	if err != nil {
 		t.Fatalf("unexpected error during RPC: %v", err)
 	}
 
-	h.check(t, "grpc.testing.TestService.FullDuplexCall", codes.ResourceExhausted, 3, 6)
+	h.check(t, "testing.TestService.FullDuplexCall", codes.ResourceExhausted, 3, 6)
 }
 
 type handler struct {

internal/testing/cmd/bankdemo/auth.go

@@ -1,9 +1,9 @@
 package main
 
 import (
+	"context"
 	"strings"
 
-	"golang.org/x/net/context"
 	"google.golang.org/grpc/metadata"
 )
 

internal/testing/cmd/bankdemo/bank.go

@@ -1,12 +1,12 @@
 package main
 
 import (
+	"context"
 	"fmt"
 	"time"
 
 	"github.com/golang/protobuf/ptypes"
 	"github.com/golang/protobuf/ptypes/empty"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 )

internal/testing/cmd/bankdemo/bank.proto

@@ -1,6 +1,6 @@
 syntax = "proto3";
 
-option go_package = "main";
+option go_package = ".;main";
 
 import "google/protobuf/empty.proto";
 import "google/protobuf/timestamp.proto";

internal/testing/cmd/bankdemo/chat.go

@@ -1,14 +1,14 @@
 package main
 
 import (
+	"context"
 	"fmt"
 	"io"
 	"sync"
 
-	"github.com/golang/protobuf/ptypes"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
+	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
 // chatServer implements the Support gRPC service, for providing
@@ -134,7 +134,7 @@ func (s *chatServer) ChatCustomer(stream Support_ChatCustomerServer) error {
 			}
 
 			entry := &ChatEntry{
-				Date: ptypes.TimestampNow(),
+				Date: timestamppb.Now(),
 				Entry: &ChatEntry_CustomerMsg{
 					CustomerMsg: req.Msg,
 				},
@@ -279,7 +279,7 @@ func (s *chatServer) ChatAgent(stream Support_ChatAgentServer) error {
 			}
 
 			entry := &ChatEntry{
-				Date: ptypes.TimestampNow(),
+				Date: timestamppb.Now(),
 				Entry: &ChatEntry_AgentMsg{
 					AgentMsg: &AgentMessage{
 						AgentName: agent,

internal/testing/cmd/bankdemo/db.go

@@ -1,14 +1,13 @@
 package main
 
 import (
-	"bytes"
 	"fmt"
 	"sync"
 
-	"github.com/golang/protobuf/jsonpb"
-	"github.com/golang/protobuf/ptypes"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
+	"google.golang.org/protobuf/encoding/protojson"
+	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
 // In-memory database that is periodically saved to a JSON file.
@@ -38,11 +37,12 @@ func (a *accounts) openAccount(customer string, accountType Account_Type, initia
 	a.AccountNumbersByCustomer[customer] = accountNums
 	var acct account
 	acct.AccountNumber = num
+	acct.Type = accountType
 	acct.BalanceCents = initialBalanceCents
 	acct.Transactions = append(acct.Transactions, &Transaction{
 		AccountNumber: num,
 		SeqNumber:     1,
-		Date:          ptypes.TimestampNow(),
+		Date:          timestamppb.Now(),
 		AmountCents:   initialBalanceCents,
 		Desc:          "initial deposit",
 	})
@@ -129,7 +129,7 @@ func (a *account) newTransaction(amountCents int32, desc string) (newBalance int
 	a.BalanceCents = bal
 	a.Transactions = append(a.Transactions, &Transaction{
 		AccountNumber: a.AccountNumber,
-		Date:          ptypes.TimestampNow(),
+		Date:          timestamppb.Now(),
 		AmountCents:   amountCents,
 		SeqNumber:     uint64(len(a.Transactions) + 1),
 		Desc:          desc,
@@ -138,16 +138,11 @@ func (a *account) newTransaction(amountCents int32, desc string) (newBalance int
 }
 
 func (t *Transaction) MarshalJSON() ([]byte, error) {
-	var jsm jsonpb.Marshaler
-	var buf bytes.Buffer
-	if err := jsm.Marshal(&buf, t); err != nil {
-		return nil, err
-	}
-	return buf.Bytes(), nil
+	return protojson.Marshal(t)
 }
 
 func (t *Transaction) UnmarshalJSON(b []byte) error {
-	return jsonpb.Unmarshal(bytes.NewReader(b), t)
+	return protojson.Unmarshal(b, t)
 }
 
 func (a *accounts) clone() *accounts {

internal/testing/cmd/bankdemo/main.go

@@ -3,6 +3,7 @@ package main
 //go:generate protoc --go_out=plugins=grpc:./ bank.proto support.proto
 
 import (
+	"context"
 	"encoding/json"
 	"flag"
 	"fmt"
@@ -14,7 +15,6 @@ import (
 	"syscall"
 	"time"
 
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/grpclog"
 	"google.golang.org/grpc/peer"

internal/testing/cmd/bankdemo/support.proto

@@ -1,6 +1,6 @@
 syntax = "proto3";
 
-option go_package = "main";
+option go_package = ".;main";
 
 import "google/protobuf/timestamp.proto";
 

internal/testing/cmd/testserver/testserver.go

@@ -2,6 +2,7 @@
 package main
 
 import (
+	"context"
 	"flag"
 	"fmt"
 	"net"
@@ -9,17 +10,15 @@ import (
 	"sync/atomic"
 	"time"
 
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/grpclog"
-	"google.golang.org/grpc/interop/grpc_testing"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/reflection"
 	"google.golang.org/grpc/status"
 
 	"github.com/fullstorydev/grpcurl"
-	grpcurl_testing "github.com/fullstorydev/grpcurl/testing"
+	grpcurl_testing "github.com/fullstorydev/grpcurl/internal/testing"
 )
 
 var (
@@ -96,7 +95,7 @@ func main() {
 
 	svr := grpc.NewServer(opts...)
 
-	grpc_testing.RegisterTestServiceServer(svr, grpcurl_testing.TestServer{})
+	grpcurl_testing.RegisterTestServiceServer(svr, grpcurl_testing.TestServer{})
 	if !*noreflect {
 		reflection.Register(svr)
 	}
@@ -120,7 +119,7 @@ func unaryLogger(ctx context.Context, req interface{}, info *grpc.UnaryServerInf
 	} else {
 		code = codes.Unknown
 	}
-	grpclog.Infof("completed <%d>: %v (%d) %v\n", i, code, code, time.Now().Sub(start))
+	grpclog.Infof("completed <%d>: %v (%d) %v\n", i, code, code, time.Since(start))
 	return rsp, err
 }
 
@@ -135,7 +134,7 @@ func streamLogger(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServer
 	} else {
 		code = codes.Unknown
 	}
-	grpclog.Infof("completed <%d>: %v(%d) %v\n", i, code, code, time.Now().Sub(start))
+	grpclog.Infof("completed <%d>: %v(%d) %v\n", i, code, code, time.Since(start))
 	return err
 }
 

internal/testing/example.proto

@@ -3,9 +3,11 @@ syntax = "proto3";
 import "google/protobuf/descriptor.proto";
 import "google/protobuf/empty.proto";
 import "google/protobuf/timestamp.proto";
+import "example2.proto";
 
 message TestRequest {
 	repeated string file_names = 1;
+	repeated Extension extensions = 2;
 }
 
 message TestResponse {

internal/testing/example2.proto

@@ -0,0 +1,8 @@
+syntax = "proto3";
+
+import "google/protobuf/any.proto";
+
+message Extension {
+    uint64 id = 1;
+    google.protobuf.Any data = 2;
+}

internal/testing/jsonpb_test_proto/test_objects.pb.go

@@ -0,0 +1,344 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.25.0-devel
+// 	protoc        v3.14.0
+// source: test_objects.proto
+
+package jsonpb
+
+import (
+	proto "github.com/golang/protobuf/proto"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	anypb "google.golang.org/protobuf/types/known/anypb"
+	durationpb "google.golang.org/protobuf/types/known/durationpb"
+	structpb "google.golang.org/protobuf/types/known/structpb"
+	timestamppb "google.golang.org/protobuf/types/known/timestamppb"
+	wrapperspb "google.golang.org/protobuf/types/known/wrapperspb"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
+type KnownTypes struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	An    *anypb.Any              `protobuf:"bytes,14,opt,name=an" json:"an,omitempty"`
+	Dur   *durationpb.Duration    `protobuf:"bytes,1,opt,name=dur" json:"dur,omitempty"`
+	St    *structpb.Struct        `protobuf:"bytes,12,opt,name=st" json:"st,omitempty"`
+	Ts    *timestamppb.Timestamp  `protobuf:"bytes,2,opt,name=ts" json:"ts,omitempty"`
+	Lv    *structpb.ListValue     `protobuf:"bytes,15,opt,name=lv" json:"lv,omitempty"`
+	Val   *structpb.Value         `protobuf:"bytes,16,opt,name=val" json:"val,omitempty"`
+	Dbl   *wrapperspb.DoubleValue `protobuf:"bytes,3,opt,name=dbl" json:"dbl,omitempty"`
+	Flt   *wrapperspb.FloatValue  `protobuf:"bytes,4,opt,name=flt" json:"flt,omitempty"`
+	I64   *wrapperspb.Int64Value  `protobuf:"bytes,5,opt,name=i64" json:"i64,omitempty"`
+	U64   *wrapperspb.UInt64Value `protobuf:"bytes,6,opt,name=u64" json:"u64,omitempty"`
+	I32   *wrapperspb.Int32Value  `protobuf:"bytes,7,opt,name=i32" json:"i32,omitempty"`
+	U32   *wrapperspb.UInt32Value `protobuf:"bytes,8,opt,name=u32" json:"u32,omitempty"`
+	Bool  *wrapperspb.BoolValue   `protobuf:"bytes,9,opt,name=bool" json:"bool,omitempty"`
+	Str   *wrapperspb.StringValue `protobuf:"bytes,10,opt,name=str" json:"str,omitempty"`
+	Bytes *wrapperspb.BytesValue  `protobuf:"bytes,11,opt,name=bytes" json:"bytes,omitempty"`
+}
+
+func (x *KnownTypes) Reset() {
+	*x = KnownTypes{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_test_objects_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *KnownTypes) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*KnownTypes) ProtoMessage() {}
+
+func (x *KnownTypes) ProtoReflect() protoreflect.Message {
+	mi := &file_test_objects_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use KnownTypes.ProtoReflect.Descriptor instead.
+func (*KnownTypes) Descriptor() ([]byte, []int) {
+	return file_test_objects_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *KnownTypes) GetAn() *anypb.Any {
+	if x != nil {
+		return x.An
+	}
+	return nil
+}
+
+func (x *KnownTypes) GetDur() *durationpb.Duration {
+	if x != nil {
+		return x.Dur
+	}
+	return nil
+}
+
+func (x *KnownTypes) GetSt() *structpb.Struct {
+	if x != nil {
+		return x.St
+	}
+	return nil
+}
+
+func (x *KnownTypes) GetTs() *timestamppb.Timestamp {
+	if x != nil {
+		return x.Ts
+	}
+	return nil
+}
+
+func (x *KnownTypes) GetLv() *structpb.ListValue {
+	if x != nil {
+		return x.Lv
+	}
+	return nil
+}
+
+func (x *KnownTypes) GetVal() *structpb.Value {
+	if x != nil {
+		return x.Val
+	}
+	return nil
+}
+
+func (x *KnownTypes) GetDbl() *wrapperspb.DoubleValue {
+	if x != nil {
+		return x.Dbl
+	}
+	return nil
+}
+
+func (x *KnownTypes) GetFlt() *wrapperspb.FloatValue {
+	if x != nil {
+		return x.Flt
+	}
+	return nil
+}
+
+func (x *KnownTypes) GetI64() *wrapperspb.Int64Value {
+	if x != nil {
+		return x.I64
+	}
+	return nil
+}
+
+func (x *KnownTypes) GetU64() *wrapperspb.UInt64Value {
+	if x != nil {
+		return x.U64
+	}
+	return nil
+}
+
+func (x *KnownTypes) GetI32() *wrapperspb.Int32Value {
+	if x != nil {
+		return x.I32
+	}
+	return nil
+}
+
+func (x *KnownTypes) GetU32() *wrapperspb.UInt32Value {
+	if x != nil {
+		return x.U32
+	}
+	return nil
+}
+
+func (x *KnownTypes) GetBool() *wrapperspb.BoolValue {
+	if x != nil {
+		return x.Bool
+	}
+	return nil
+}
+
+func (x *KnownTypes) GetStr() *wrapperspb.StringValue {
+	if x != nil {
+		return x.Str
+	}
+	return nil
+}
+
+func (x *KnownTypes) GetBytes() *wrapperspb.BytesValue {
+	if x != nil {
+		return x.Bytes
+	}
+	return nil
+}
+
+var File_test_objects_proto protoreflect.FileDescriptor
+
+var file_test_objects_proto_rawDesc = []byte{
+	0x0a, 0x12, 0x74, 0x65, 0x73, 0x74, 0x5f, 0x6f, 0x62, 0x6a, 0x65, 0x63, 0x74, 0x73, 0x2e, 0x70,
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+	0x32, 0x1c, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62,
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+	0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2e,
+	0x53, 0x74, 0x72, 0x69, 0x6e, 0x67, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x52, 0x03, 0x73, 0x74, 0x72,
+	0x12, 0x31, 0x0a, 0x05, 0x62, 0x79, 0x74, 0x65, 0x73, 0x18, 0x0b, 0x20, 0x01, 0x28, 0x0b, 0x32,
+	0x1b, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75,
+	0x66, 0x2e, 0x42, 0x79, 0x74, 0x65, 0x73, 0x56, 0x61, 0x6c, 0x75, 0x65, 0x52, 0x05, 0x62, 0x79,
+	0x74, 0x65, 0x73, 0x42, 0x0a, 0x5a, 0x08, 0x2e, 0x3b, 0x6a, 0x73, 0x6f, 0x6e, 0x70, 0x62,
+}
+
+var (
+	file_test_objects_proto_rawDescOnce sync.Once
+	file_test_objects_proto_rawDescData = file_test_objects_proto_rawDesc
+)
+
+func file_test_objects_proto_rawDescGZIP() []byte {
+	file_test_objects_proto_rawDescOnce.Do(func() {
+		file_test_objects_proto_rawDescData = protoimpl.X.CompressGZIP(file_test_objects_proto_rawDescData)
+	})
+	return file_test_objects_proto_rawDescData
+}
+
+var file_test_objects_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_test_objects_proto_goTypes = []interface{}{
+	(*KnownTypes)(nil),             // 0: jsonpb.KnownTypes
+	(*anypb.Any)(nil),              // 1: google.protobuf.Any
+	(*durationpb.Duration)(nil),    // 2: google.protobuf.Duration
+	(*structpb.Struct)(nil),        // 3: google.protobuf.Struct
+	(*timestamppb.Timestamp)(nil),  // 4: google.protobuf.Timestamp
+	(*structpb.ListValue)(nil),     // 5: google.protobuf.ListValue
+	(*structpb.Value)(nil),         // 6: google.protobuf.Value
+	(*wrapperspb.DoubleValue)(nil), // 7: google.protobuf.DoubleValue
+	(*wrapperspb.FloatValue)(nil),  // 8: google.protobuf.FloatValue
+	(*wrapperspb.Int64Value)(nil),  // 9: google.protobuf.Int64Value
+	(*wrapperspb.UInt64Value)(nil), // 10: google.protobuf.UInt64Value
+	(*wrapperspb.Int32Value)(nil),  // 11: google.protobuf.Int32Value
+	(*wrapperspb.UInt32Value)(nil), // 12: google.protobuf.UInt32Value
+	(*wrapperspb.BoolValue)(nil),   // 13: google.protobuf.BoolValue
+	(*wrapperspb.StringValue)(nil), // 14: google.protobuf.StringValue
+	(*wrapperspb.BytesValue)(nil),  // 15: google.protobuf.BytesValue
+}
+var file_test_objects_proto_depIdxs = []int32{
+	1,  // 0: jsonpb.KnownTypes.an:type_name -> google.protobuf.Any
+	2,  // 1: jsonpb.KnownTypes.dur:type_name -> google.protobuf.Duration
+	3,  // 2: jsonpb.KnownTypes.st:type_name -> google.protobuf.Struct
+	4,  // 3: jsonpb.KnownTypes.ts:type_name -> google.protobuf.Timestamp
+	5,  // 4: jsonpb.KnownTypes.lv:type_name -> google.protobuf.ListValue
+	6,  // 5: jsonpb.KnownTypes.val:type_name -> google.protobuf.Value
+	7,  // 6: jsonpb.KnownTypes.dbl:type_name -> google.protobuf.DoubleValue
+	8,  // 7: jsonpb.KnownTypes.flt:type_name -> google.protobuf.FloatValue
+	9,  // 8: jsonpb.KnownTypes.i64:type_name -> google.protobuf.Int64Value
+	10, // 9: jsonpb.KnownTypes.u64:type_name -> google.protobuf.UInt64Value
+	11, // 10: jsonpb.KnownTypes.i32:type_name -> google.protobuf.Int32Value
+	12, // 11: jsonpb.KnownTypes.u32:type_name -> google.protobuf.UInt32Value
+	13, // 12: jsonpb.KnownTypes.bool:type_name -> google.protobuf.BoolValue
+	14, // 13: jsonpb.KnownTypes.str:type_name -> google.protobuf.StringValue
+	15, // 14: jsonpb.KnownTypes.bytes:type_name -> google.protobuf.BytesValue
+	15, // [15:15] is the sub-list for method output_type
+	15, // [15:15] is the sub-list for method input_type
+	15, // [15:15] is the sub-list for extension type_name
+	15, // [15:15] is the sub-list for extension extendee
+	0,  // [0:15] is the sub-list for field type_name
+}
+
+func init() { file_test_objects_proto_init() }
+func file_test_objects_proto_init() {
+	if File_test_objects_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_test_objects_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*KnownTypes); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_test_objects_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_test_objects_proto_goTypes,
+		DependencyIndexes: file_test_objects_proto_depIdxs,
+		MessageInfos:      file_test_objects_proto_msgTypes,
+	}.Build()
+	File_test_objects_proto = out.File
+	file_test_objects_proto_rawDesc = nil
+	file_test_objects_proto_goTypes = nil
+	file_test_objects_proto_depIdxs = nil
+}

internal/testing/jsonpb_test_proto/test_objects.proto

@@ -0,0 +1,30 @@
+syntax = "proto2";
+
+import "google/protobuf/any.proto";
+import "google/protobuf/duration.proto";
+import "google/protobuf/struct.proto";
+import "google/protobuf/timestamp.proto";
+import "google/protobuf/wrappers.proto";
+
+package jsonpb;
+
+option go_package=".;jsonpb";
+
+message KnownTypes {
+  optional google.protobuf.Any an = 14;
+  optional google.protobuf.Duration dur = 1;
+  optional google.protobuf.Struct st = 12;
+  optional google.protobuf.Timestamp ts = 2;
+  optional google.protobuf.ListValue lv = 15;
+  optional google.protobuf.Value val = 16;
+
+  optional google.protobuf.DoubleValue dbl = 3;
+  optional google.protobuf.FloatValue flt = 4;
+  optional google.protobuf.Int64Value i64 = 5;
+  optional google.protobuf.UInt64Value u64 = 6;
+  optional google.protobuf.Int32Value i32 = 7;
+  optional google.protobuf.UInt32Value u32 = 8;
+  optional google.protobuf.BoolValue bool = 9;
+  optional google.protobuf.StringValue str = 10;
+  optional google.protobuf.BytesValue bytes = 11;
+}

internal/testing/test.proto

@@ -18,7 +18,9 @@
 // of unary/streaming requests/responses.
 syntax = "proto3";
 
-package grpc.testing;
+package testing;
+
+option go_package = ".;testing";
 
 message Empty {}
 
@@ -172,5 +174,5 @@ service TestService {
 // that case.
 service UnimplementedService {
   // A call that no server should implement
-  rpc UnimplementedCall(grpc.testing.Empty) returns (grpc.testing.Empty);
+  rpc UnimplementedCall(Empty) returns (Empty);
 }

internal/testing/test_server.go

@@ -1,14 +1,17 @@
 package testing
 
+//go:generate protoc --go_out=plugins=grpc:./ test.proto
+//go:generate protoc --descriptor_set_out=./test.protoset test.proto
+//go:generate protoc --descriptor_set_out=./example.protoset --include_imports example.proto
+
 import (
+	"context"
 	"io"
 	"strconv"
 	"time"
 
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
-	"google.golang.org/grpc/interop/grpc_testing"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/status"
 
@@ -19,7 +22,7 @@ import (
 type TestServer struct{}
 
 // EmptyCall accepts one empty request and issues one empty response.
-func (TestServer) EmptyCall(ctx context.Context, req *grpc_testing.Empty) (*grpc_testing.Empty, error) {
+func (TestServer) EmptyCall(ctx context.Context, req *Empty) (*Empty, error) {
 	headers, trailers, failEarly, failLate := processMetadata(ctx)
 	grpc.SetHeader(ctx, headers)
 	grpc.SetTrailer(ctx, trailers)
@@ -35,7 +38,7 @@ func (TestServer) EmptyCall(ctx context.Context, req *grpc_testing.Empty) (*grpc
 
 // UnaryCall accepts one request and issues one response. The response includes
 // the client's payload as-is.
-func (TestServer) UnaryCall(ctx context.Context, req *grpc_testing.SimpleRequest) (*grpc_testing.SimpleResponse, error) {
+func (TestServer) UnaryCall(ctx context.Context, req *SimpleRequest) (*SimpleResponse, error) {
 	headers, trailers, failEarly, failLate := processMetadata(ctx)
 	grpc.SetHeader(ctx, headers)
 	grpc.SetTrailer(ctx, trailers)
@@ -46,7 +49,7 @@ func (TestServer) UnaryCall(ctx context.Context, req *grpc_testing.SimpleRequest
 		return nil, status.Error(failLate, "fail")
 	}
 
-	return &grpc_testing.SimpleResponse{
+	return &SimpleResponse{
 		Payload: req.Payload,
 	}, nil
 }
@@ -54,7 +57,7 @@ func (TestServer) UnaryCall(ctx context.Context, req *grpc_testing.SimpleRequest
 // StreamingOutputCall accepts one request and issues a sequence of responses
 // (streamed download). The server returns the payload with client desired type
 // and sizes as specified in the request's ResponseParameters.
-func (TestServer) StreamingOutputCall(req *grpc_testing.StreamingOutputCallRequest, str grpc_testing.TestService_StreamingOutputCallServer) error {
+func (TestServer) StreamingOutputCall(req *StreamingOutputCallRequest, str TestService_StreamingOutputCallServer) error {
 	headers, trailers, failEarly, failLate := processMetadata(str.Context())
 	str.SetHeader(headers)
 	str.SetTrailer(trailers)
@@ -62,7 +65,7 @@ func (TestServer) StreamingOutputCall(req *grpc_testing.StreamingOutputCallReque
 		return status.Error(failEarly, "fail")
 	}
 
-	rsp := &grpc_testing.StreamingOutputCallResponse{Payload: &grpc_testing.Payload{}}
+	rsp := &StreamingOutputCallResponse{Payload: &Payload{}}
 	for _, param := range req.ResponseParameters {
 		if str.Context().Err() != nil {
 			return str.Context().Err()
@@ -92,7 +95,7 @@ func (TestServer) StreamingOutputCall(req *grpc_testing.StreamingOutputCallReque
 // StreamingInputCall accepts a sequence of requests and issues one response
 // (streamed upload). The server returns the aggregated size of client payloads
 // as the result.
-func (TestServer) StreamingInputCall(str grpc_testing.TestService_StreamingInputCallServer) error {
+func (TestServer) StreamingInputCall(str TestService_StreamingInputCallServer) error {
 	headers, trailers, failEarly, failLate := processMetadata(str.Context())
 	str.SetHeader(headers)
 	str.SetTrailer(trailers)
@@ -114,7 +117,7 @@ func (TestServer) StreamingInputCall(str grpc_testing.TestService_StreamingInput
 			sz += len(req.Payload.Body)
 		}
 	}
-	if err := str.SendAndClose(&grpc_testing.StreamingInputCallResponse{AggregatedPayloadSize: int32(sz)}); err != nil {
+	if err := str.SendAndClose(&StreamingInputCallResponse{AggregatedPayloadSize: int32(sz)}); err != nil {
 		return err
 	}
 
@@ -127,7 +130,7 @@ func (TestServer) StreamingInputCall(str grpc_testing.TestService_StreamingInput
 // FullDuplexCall accepts a sequence of requests with each request served by the
 // server immediately. As one request could lead to multiple responses, this
 // interface demonstrates the idea of full duplexing.
-func (TestServer) FullDuplexCall(str grpc_testing.TestService_FullDuplexCallServer) error {
+func (TestServer) FullDuplexCall(str TestService_FullDuplexCallServer) error {
 	headers, trailers, failEarly, failLate := processMetadata(str.Context())
 	str.SetHeader(headers)
 	str.SetTrailer(trailers)
@@ -135,7 +138,7 @@ func (TestServer) FullDuplexCall(str grpc_testing.TestService_FullDuplexCallServ
 		return status.Error(failEarly, "fail")
 	}
 
-	rsp := &grpc_testing.StreamingOutputCallResponse{Payload: &grpc_testing.Payload{}}
+	rsp := &StreamingOutputCallResponse{Payload: &Payload{}}
 	for {
 		if str.Context().Err() != nil {
 			return str.Context().Err()
@@ -170,7 +173,7 @@ func (TestServer) FullDuplexCall(str grpc_testing.TestService_FullDuplexCallServ
 // responses. The server buffers all the client requests and then serves them
 // in order. A stream of responses is returned to the client once the client
 // half-closes the stream.
-func (TestServer) HalfDuplexCall(str grpc_testing.TestService_HalfDuplexCallServer) error {
+func (TestServer) HalfDuplexCall(str TestService_HalfDuplexCallServer) error {
 	headers, trailers, failEarly, failLate := processMetadata(str.Context())
 	str.SetHeader(headers)
 	str.SetTrailer(trailers)
@@ -178,7 +181,7 @@ func (TestServer) HalfDuplexCall(str grpc_testing.TestService_HalfDuplexCallServ
 		return status.Error(failEarly, "fail")
 	}
 
-	var reqs []*grpc_testing.StreamingOutputCallRequest
+	var reqs []*StreamingOutputCallRequest
 	for {
 		if str.Context().Err() != nil {
 			return str.Context().Err()
@@ -192,7 +195,7 @@ func (TestServer) HalfDuplexCall(str grpc_testing.TestService_HalfDuplexCallServ
 			reqs = append(reqs, req)
 		}
 	}
-	rsp := &grpc_testing.StreamingOutputCallResponse{}
+	rsp := &StreamingOutputCallResponse{}
 	for _, req := range reqs {
 		rsp.Payload = req.Payload
 		if err := str.Send(rsp); err != nil {
@@ -251,4 +254,4 @@ func toCode(vals []string) codes.Code {
 	return codes.Code(i)
 }
 
-var _ grpc_testing.TestServiceServer = TestServer{}
+var _ TestServiceServer = TestServer{}

invoke.go

@@ -0,0 +1,397 @@
+package grpcurl
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"io"
+	"strings"
+	"sync"
+	"sync/atomic"
+
+	"github.com/golang/protobuf/jsonpb" //lint:ignore SA1019 we have to import this because it appears in exported API
+	"github.com/golang/protobuf/proto"  //lint:ignore SA1019 we have to import this because it appears in exported API
+	"github.com/jhump/protoreflect/desc"
+	"github.com/jhump/protoreflect/dynamic"
+	"github.com/jhump/protoreflect/dynamic/grpcdynamic"
+	"github.com/jhump/protoreflect/grpcreflect"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/status"
+)
+
+// InvocationEventHandler is a bag of callbacks for handling events that occur in the course
+// of invoking an RPC. The handler also provides request data that is sent. The callbacks are
+// generally called in the order they are listed below.
+type InvocationEventHandler interface {
+	// OnResolveMethod is called with a descriptor of the method that is being invoked.
+	OnResolveMethod(*desc.MethodDescriptor)
+	// OnSendHeaders is called with the request metadata that is being sent.
+	OnSendHeaders(metadata.MD)
+	// OnReceiveHeaders is called when response headers have been received.
+	OnReceiveHeaders(metadata.MD)
+	// OnReceiveResponse is called for each response message received.
+	OnReceiveResponse(proto.Message)
+	// OnReceiveTrailers is called when response trailers and final RPC status have been received.
+	OnReceiveTrailers(*status.Status, metadata.MD)
+}
+
+// RequestMessageSupplier is a function that is called to retrieve request
+// messages for a GRPC operation. This type is deprecated and will be removed in
+// a future release.
+//
+// Deprecated: This is only used with the deprecated InvokeRpc. Instead, use
+// RequestSupplier with InvokeRPC.
+type RequestMessageSupplier func() ([]byte, error)
+
+// InvokeRpc uses the given gRPC connection to invoke the given method. This function is deprecated
+// and will be removed in a future release. It just delegates to the similarly named InvokeRPC
+// method, whose signature is only slightly different.
+//
+// Deprecated: use InvokeRPC instead.
+func InvokeRpc(ctx context.Context, source DescriptorSource, cc *grpc.ClientConn, methodName string,
+	headers []string, handler InvocationEventHandler, requestData RequestMessageSupplier) error {
+
+	return InvokeRPC(ctx, source, cc, methodName, headers, handler, func(m proto.Message) error {
+		// New function is almost identical, but the request supplier function works differently.
+		// So we adapt the logic here to maintain compatibility.
+		data, err := requestData()
+		if err != nil {
+			return err
+		}
+		return jsonpb.Unmarshal(bytes.NewReader(data), m)
+	})
+}
+
+// RequestSupplier is a function that is called to populate messages for a gRPC operation. The
+// function should populate the given message or return a non-nil error. If the supplier has no
+// more messages, it should return io.EOF. When it returns io.EOF, it should not in any way
+// modify the given message argument.
+type RequestSupplier func(proto.Message) error
+
+// InvokeRPC uses the given gRPC channel to invoke the given method. The given descriptor source
+// is used to determine the type of method and the type of request and response message. The given
+// headers are sent as request metadata. Methods on the given event handler are called as the
+// invocation proceeds.
+//
+// The given requestData function supplies the actual data to send. It should return io.EOF when
+// there is no more request data. If the method being invoked is a unary or server-streaming RPC
+// (e.g. exactly one request message) and there is no request data (e.g. the first invocation of
+// the function returns io.EOF), then an empty request message is sent.
+//
+// If the requestData function and the given event handler coordinate or share any state, they should
+// be thread-safe. This is because the requestData function may be called from a different goroutine
+// than the one invoking event callbacks. (This only happens for bi-directional streaming RPCs, where
+// one goroutine sends request messages and another consumes the response messages).
+func InvokeRPC(ctx context.Context, source DescriptorSource, ch grpcdynamic.Channel, methodName string,
+	headers []string, handler InvocationEventHandler, requestData RequestSupplier) error {
+
+	md := MetadataFromHeaders(headers)
+
+	svc, mth := parseSymbol(methodName)
+	if svc == "" || mth == "" {
+		return fmt.Errorf("given method name %q is not in expected format: 'service/method' or 'service.method'", methodName)
+	}
+
+	dsc, err := source.FindSymbol(svc)
+	if err != nil {
+		// return a gRPC status error if hasStatus is true
+		errStatus, hasStatus := status.FromError(err)
+		switch {
+		case hasStatus && isNotFoundError(err):
+			return status.Errorf(errStatus.Code(), "target server does not expose service %q: %s", svc, errStatus.Message())
+		case hasStatus:
+			return status.Errorf(errStatus.Code(), "failed to query for service descriptor %q: %s", svc, errStatus.Message())
+		case isNotFoundError(err):
+			return fmt.Errorf("target server does not expose service %q", svc)
+		}
+		return fmt.Errorf("failed to query for service descriptor %q: %v", svc, err)
+	}
+	sd, ok := dsc.(*desc.ServiceDescriptor)
+	if !ok {
+		return fmt.Errorf("target server does not expose service %q", svc)
+	}
+	mtd := sd.FindMethodByName(mth)
+	if mtd == nil {
+		return fmt.Errorf("service %q does not include a method named %q", svc, mth)
+	}
+
+	handler.OnResolveMethod(mtd)
+
+	// we also download any applicable extensions so we can provide full support for parsing user-provided data
+	var ext dynamic.ExtensionRegistry
+	alreadyFetched := map[string]bool{}
+	if err = fetchAllExtensions(source, &ext, mtd.GetInputType(), alreadyFetched); err != nil {
+		return fmt.Errorf("error resolving server extensions for message %s: %v", mtd.GetInputType().GetFullyQualifiedName(), err)
+	}
+	if err = fetchAllExtensions(source, &ext, mtd.GetOutputType(), alreadyFetched); err != nil {
+		return fmt.Errorf("error resolving server extensions for message %s: %v", mtd.GetOutputType().GetFullyQualifiedName(), err)
+	}
+
+	msgFactory := dynamic.NewMessageFactoryWithExtensionRegistry(&ext)
+	req := msgFactory.NewMessage(mtd.GetInputType())
+
+	handler.OnSendHeaders(md)
+	ctx = metadata.NewOutgoingContext(ctx, md)
+
+	stub := grpcdynamic.NewStubWithMessageFactory(ch, msgFactory)
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+
+	if mtd.IsClientStreaming() && mtd.IsServerStreaming() {
+		return invokeBidi(ctx, stub, mtd, handler, requestData, req)
+	} else if mtd.IsClientStreaming() {
+		return invokeClientStream(ctx, stub, mtd, handler, requestData, req)
+	} else if mtd.IsServerStreaming() {
+		return invokeServerStream(ctx, stub, mtd, handler, requestData, req)
+	} else {
+		return invokeUnary(ctx, stub, mtd, handler, requestData, req)
+	}
+}
+
+func invokeUnary(ctx context.Context, stub grpcdynamic.Stub, md *desc.MethodDescriptor, handler InvocationEventHandler,
+	requestData RequestSupplier, req proto.Message) error {
+
+	err := requestData(req)
+	if err != nil && err != io.EOF {
+		return fmt.Errorf("error getting request data: %v", err)
+	}
+	if err != io.EOF {
+		// verify there is no second message, which is a usage error
+		err := requestData(req)
+		if err == nil {
+			return fmt.Errorf("method %q is a unary RPC, but request data contained more than 1 message", md.GetFullyQualifiedName())
+		} else if err != io.EOF {
+			return fmt.Errorf("error getting request data: %v", err)
+		}
+	}
+
+	// Now we can actually invoke the RPC!
+	var respHeaders metadata.MD
+	var respTrailers metadata.MD
+	resp, err := stub.InvokeRpc(ctx, md, req, grpc.Trailer(&respTrailers), grpc.Header(&respHeaders))
+
+	stat, ok := status.FromError(err)
+	if !ok {
+		// Error codes sent from the server will get printed differently below.
+		// So just bail for other kinds of errors here.
+		return fmt.Errorf("grpc call for %q failed: %v", md.GetFullyQualifiedName(), err)
+	}
+
+	handler.OnReceiveHeaders(respHeaders)
+
+	if stat.Code() == codes.OK {
+		handler.OnReceiveResponse(resp)
+	}
+
+	handler.OnReceiveTrailers(stat, respTrailers)
+
+	return nil
+}
+
+func invokeClientStream(ctx context.Context, stub grpcdynamic.Stub, md *desc.MethodDescriptor, handler InvocationEventHandler,
+	requestData RequestSupplier, req proto.Message) error {
+
+	// invoke the RPC!
+	str, err := stub.InvokeRpcClientStream(ctx, md)
+
+	// Upload each request message in the stream
+	var resp proto.Message
+	for err == nil {
+		err = requestData(req)
+		if err == io.EOF {
+			resp, err = str.CloseAndReceive()
+			break
+		}
+		if err != nil {
+			return fmt.Errorf("error getting request data: %v", err)
+		}
+
+		err = str.SendMsg(req)
+		if err == io.EOF {
+			// We get EOF on send if the server says "go away"
+			// We have to use CloseAndReceive to get the actual code
+			resp, err = str.CloseAndReceive()
+			break
+		}
+
+		req.Reset()
+	}
+
+	// finally, process response data
+	stat, ok := status.FromError(err)
+	if !ok {
+		// Error codes sent from the server will get printed differently below.
+		// So just bail for other kinds of errors here.
+		return fmt.Errorf("grpc call for %q failed: %v", md.GetFullyQualifiedName(), err)
+	}
+
+	if respHeaders, err := str.Header(); err == nil {
+		handler.OnReceiveHeaders(respHeaders)
+	}
+
+	if stat.Code() == codes.OK {
+		handler.OnReceiveResponse(resp)
+	}
+
+	handler.OnReceiveTrailers(stat, str.Trailer())
+
+	return nil
+}
+
+func invokeServerStream(ctx context.Context, stub grpcdynamic.Stub, md *desc.MethodDescriptor, handler InvocationEventHandler,
+	requestData RequestSupplier, req proto.Message) error {
+
+	err := requestData(req)
+	if err != nil && err != io.EOF {
+		return fmt.Errorf("error getting request data: %v", err)
+	}
+	if err != io.EOF {
+		// verify there is no second message, which is a usage error
+		err := requestData(req)
+		if err == nil {
+			return fmt.Errorf("method %q is a server-streaming RPC, but request data contained more than 1 message", md.GetFullyQualifiedName())
+		} else if err != io.EOF {
+			return fmt.Errorf("error getting request data: %v", err)
+		}
+	}
+
+	// Now we can actually invoke the RPC!
+	str, err := stub.InvokeRpcServerStream(ctx, md, req)
+
+	if respHeaders, err := str.Header(); err == nil {
+		handler.OnReceiveHeaders(respHeaders)
+	}
+
+	// Download each response message
+	for err == nil {
+		var resp proto.Message
+		resp, err = str.RecvMsg()
+		if err != nil {
+			if err == io.EOF {
+				err = nil
+			}
+			break
+		}
+		handler.OnReceiveResponse(resp)
+	}
+
+	stat, ok := status.FromError(err)
+	if !ok {
+		// Error codes sent from the server will get printed differently below.
+		// So just bail for other kinds of errors here.
+		return fmt.Errorf("grpc call for %q failed: %v", md.GetFullyQualifiedName(), err)
+	}
+
+	handler.OnReceiveTrailers(stat, str.Trailer())
+
+	return nil
+}
+
+func invokeBidi(ctx context.Context, stub grpcdynamic.Stub, md *desc.MethodDescriptor, handler InvocationEventHandler,
+	requestData RequestSupplier, req proto.Message) error {
+
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+
+	// invoke the RPC!
+	str, err := stub.InvokeRpcBidiStream(ctx, md)
+
+	var wg sync.WaitGroup
+	var sendErr atomic.Value
+
+	defer wg.Wait()
+
+	if err == nil {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+
+			// Concurrently upload each request message in the stream
+			var err error
+			for err == nil {
+				err = requestData(req)
+
+				if err == io.EOF {
+					err = str.CloseSend()
+					break
+				}
+				if err != nil {
+					err = fmt.Errorf("error getting request data: %v", err)
+					cancel()
+					break
+				}
+
+				err = str.SendMsg(req)
+
+				req.Reset()
+			}
+
+			if err != nil {
+				sendErr.Store(err)
+			}
+		}()
+	}
+
+	if respHeaders, err := str.Header(); err == nil {
+		handler.OnReceiveHeaders(respHeaders)
+	}
+
+	// Download each response message
+	for err == nil {
+		var resp proto.Message
+		resp, err = str.RecvMsg()
+		if err != nil {
+			if err == io.EOF {
+				err = nil
+			}
+			break
+		}
+		handler.OnReceiveResponse(resp)
+	}
+
+	if se, ok := sendErr.Load().(error); ok && se != io.EOF {
+		err = se
+	}
+
+	stat, ok := status.FromError(err)
+	if !ok {
+		// Error codes sent from the server will get printed differently below.
+		// So just bail for other kinds of errors here.
+		return fmt.Errorf("grpc call for %q failed: %v", md.GetFullyQualifiedName(), err)
+	}
+
+	handler.OnReceiveTrailers(stat, str.Trailer())
+
+	return nil
+}
+
+type notFoundError string
+
+func notFound(kind, name string) error {
+	return notFoundError(fmt.Sprintf("%s not found: %s", kind, name))
+}
+
+func (e notFoundError) Error() string {
+	return string(e)
+}
+
+func isNotFoundError(err error) bool {
+	if grpcreflect.IsElementNotFoundError(err) {
+		return true
+	}
+	_, ok := err.(notFoundError)
+	return ok
+}
+
+func parseSymbol(svcAndMethod string) (string, string) {
+	pos := strings.LastIndex(svcAndMethod, "/")
+	if pos < 0 {
+		pos = strings.LastIndex(svcAndMethod, ".")
+		if pos < 0 {
+			return "", ""
+		}
+	}
+	return svcAndMethod[:pos], svcAndMethod[pos+1:]
+}

mk-test-files.sh

@@ -7,14 +7,17 @@ cd "$(dirname $0)"
 # Run this script to generate files used by tests.
 
 echo "Creating protosets..."
-protoc ../../../google.golang.org/grpc/interop/grpc_testing/test.proto \
-	-I../../../ --include_imports \
+protoc testing/test.proto \
+	--include_imports \
 	--descriptor_set_out=testing/test.protoset
 
 protoc testing/example.proto \
 	--include_imports \
 	--descriptor_set_out=testing/example.protoset
 
+protoc testing/jsonpb_test_proto/test_objects.proto \
+	--go_out=paths=source_relative:.
+
 echo "Creating certs for TLS testing..."
 if ! hash certstrap 2>/dev/null; then
   # certstrap not found: try to install it

releasing/README.md

@@ -0,0 +1,90 @@
+# Releases of gRPCurl
+
+This document provides instructions for building a release of `grpcurl`.
+
+The release process consists of a handful of tasks:
+1. Drop a release tag in git.
+2. Build binaries for various platforms. This is done using the local `go` tool and uses `GOOS` and `GOARCH` environment variables to cross-compile for supported platforms.
+3. Creates a release in GitHub, uploads the binaries, and creates provisional release notes (in the form of a change log).
+4. Build a docker image for the new release.
+5. Push the docker image to Docker Hub, with both a version tag and the "latest" tag.
+6. Submits a PR to update the [Homebrew](https://brew.sh/) recipe with the latest version.
+
+Most of this is automated via a script in this same directory. The main thing you will need is a GitHub personal access token, which will be used for creating the release in GitHub (so you need write access to the fullstorydev/grpcurl repo) and to open a Homebrew pull request.
+
+## Creating a new release
+
+So, to actually create a new release, just run the script in this directory.
+
+First, you need a version number for the new release, following sem-ver format: `v<Major>.<Minor>.<Patch>`. Second, you need a personal access token for GitHub.
+
+We'll use `v2.3.4` as an example version and `abcdef0123456789abcdef` as an example GitHub token:
+
+```sh
+# from the root of the repo
+GITHUB_TOKEN=abcdef0123456789abcd \
+    ./releasing/do-release.sh v2.3.4
+```
+
+Wasn't that easy! There is one last step: update the release notes in GitHub. By default, the script just records a change log of commit descriptions. Use that log (and, if necessary, drill into individual PRs included in the release) to flesh out notes in the format of the `RELEASE_NOTES.md` file _in this directory_. Then login to GitHub, go to the new release, edit the notes, and paste in the markdown you just wrote.
+
+That should be all there is to it! If things go wrong and you have to re-do part of the process, see the sections below.
+
+----
+
+### GitHub Releases
+The GitHub release is the first step performed by the `do-release.sh` script. So generally, if there is an issue with that step, you can re-try the whole script.
+
+Note, if running the script did something wrong, you may have to first login to GitHub and remove uploaded artifacts for a botched release attempt. In general, this is _very undesirable_. Releases should usually be considered immutable. Instead of removing uploaded assets and providing new ones, it is often better to remove uploaded assets (to make bad binaries no longer available) and then _release a new patch version_. (You can edit the release notes for the botched version explaining why there are no artifacts for it.)
+
+The steps to do a GitHub-only release (vs. running the entire script) are the following:
+
+```sh
+# from the root of the repo
+git tag v2.3.4
+GITHUB_TOKEN=abcdef0123456789abcdef \
+    GO111MODULE=on \
+    make release
+```
+
+The `git tag ...` step is necessary because the release target requires that the current SHA have a sem-ver tag. That's the version it will use when creating the release.
+
+This will create the release in GitHub with provisional release notes that just include a change log of commit messages. You still need to login to GitHub and revise those notes to adhere to the recommended format. (See `RELEASE_NOTES.md` in this directory.)
+
+### Docker Hub Releases
+
+To re-run only the Docker Hub release steps, we need to build an image with the right tag and then push to Docker Hub.
+
+```sh
+# from the root of the repo
+echo v2.3.4 > VERSION
+docker build -t fullstorydev/grpcurl:v2.3.4 .
+# now that we have it built, push to Docker Hub
+docker push fullstorydev/grpcurl:v2.3.4
+# push "latest" tag, too
+docker tag fullstorydev/grpcurl:v2.3.4 fullstorydev/grpcurl:latest
+docker push fullstorydev/grpcurl:latest
+```
+
+If the `docker push ...` steps fail, you may need to run `docker login`, enter your Docker Hub login credentials, and then try to push again.
+
+### Homebrew Releases
+
+The last step is to update the Homebrew recipe to use the latest version. First, we need to compute the SHA256 checksum for the source archive:
+
+```sh
+# download the source archive from GitHub
+URL=https://github.com/fullstorydev/grpcurl/archive/v2.3.4.tar.gz
+curl -L -o tmp.tgz $URL
+# and compute the SHA
+SHA="$(sha256sum < tmp.tgz | awk '{ print $1 }')"
+```
+
+To actually create the brew PR, you need your GitHub personal access token again, as well as the URL and SHA from the previous step:
+
+```sh
+HOMEBREW_GITHUB_API_TOKEN=abcdef0123456789abcdef \
+    brew bump-formula-pr --url $URL --sha256 $SHA grpcurl
+```
+
+This creates a PR to bump the formula to the new version. When this PR is merged by brew maintainers, the new version becomes available!

releasing/RELEASE_NOTES.md

@@ -0,0 +1,11 @@
+## Changes
+
+### Command-line tool
+
+* _In this list, describe the changes to the command-line tool._
+* _Use one bullet per change. Include both bug-fixes and improvements. Omit this section if there are no changes that impact the command-line tool._
+
+### Go package "github.com/fullstorydev/grpcurl"
+
+* _In this list, describe the changes to exported API in the main package in this repo: "github.com/fullstorydev/grpcurl". These will often be closely related to changes to the command-line tool, though not always: changes that only impact the cmd/grpcurl directory of this repo do not impact exported API._
+* _Use one bullet per change. Include both bug-fixes and improvements. Omit this section if there are no changes that impact the exported API._

releasing/do-release.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+
+# strict mode
+set -euo pipefail
+IFS=$'\n\t'
+
+if [[ -z ${DRY_RUN:-} ]]; then
+    PREFIX=""
+else
+    PREFIX="echo"
+fi
+
+# input validation
+if [[ -z ${GITHUB_TOKEN:-} ]]; then
+    echo "GITHUB_TOKEN environment variable must be set before running." >&2
+    exit 1
+fi
+if [[ $# -ne 1 || $1 == "" ]]; then
+    echo "This program requires one argument: the version number, in 'vM.N.P' format." >&2
+    exit 1
+fi
+VERSION=$1
+
+# Change to root of the repo
+cd "$(dirname "$0")/.."
+
+# GitHub release
+
+$PREFIX git tag "$VERSION"
+# make sure GITHUB_TOKEN is exported, for the benefit of this next command
+export GITHUB_TOKEN
+GO111MODULE=on $PREFIX make release
+# if that was successful, it could have touched go.mod and go.sum, so revert those
+$PREFIX git checkout go.mod go.sum
+
+# Docker release
+
+# make sure credentials are valid for later push steps; this might
+# be interactive since this will prompt for username and password
+# if there are no valid current credentials.
+$PREFIX docker login
+echo "$VERSION" > VERSION
+$PREFIX docker build -t "fullstorydev/grpcurl:${VERSION}" .
+rm VERSION
+# push to docker hub, both the given version as a tag and for "latest" tag
+$PREFIX docker push "fullstorydev/grpcurl:${VERSION}"
+$PREFIX docker tag "fullstorydev/grpcurl:${VERSION}" fullstorydev/grpcurl:latest
+$PREFIX docker push fullstorydev/grpcurl:latest
+
+# Homebrew release
+
+URL="https://github.com/fullstorydev/grpcurl/archive/${VERSION}.tar.gz"
+curl -L -o tmp.tgz "$URL"
+SHA="$(sha256sum < tmp.tgz | awk '{ print $1 }')"
+rm tmp.tgz
+HOMEBREW_GITHUB_API_TOKEN="$GITHUB_TOKEN" $PREFIX brew bump-formula-pr --url "$URL" --sha256 "$SHA" grpcurl

tls_settings_test.go

@@ -1,19 +1,18 @@
 package grpcurl_test
 
 import (
+	"context"
 	"fmt"
 	"net"
 	"strings"
 	"testing"
 	"time"
 
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials"
-	"google.golang.org/grpc/interop/grpc_testing"
 
 	. "github.com/fullstorydev/grpcurl"
-	grpcurl_testing "github.com/fullstorydev/grpcurl/testing"
+	grpcurl_testing "github.com/fullstorydev/grpcurl/internal/testing"
 )
 
 func TestPlainText(t *testing.T) {
@@ -27,11 +26,11 @@ func TestPlainText(t *testing.T) {
 }
 
 func TestBasicTLS(t *testing.T) {
-	serverCreds, err := ServerTransportCredentials("", "testing/tls/server.crt", "testing/tls/server.key", false)
+	serverCreds, err := ServerTransportCredentials("", "internal/testing/tls/server.crt", "internal/testing/tls/server.key", false)
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
-	clientCreds, err := ClientTransportCredentials(false, "testing/tls/ca.crt", "", "")
+	clientCreds, err := ClientTransportCredentials(false, "internal/testing/tls/ca.crt", "", "")
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
@@ -46,7 +45,7 @@ func TestBasicTLS(t *testing.T) {
 }
 
 func TestInsecureClientTLS(t *testing.T) {
-	serverCreds, err := ServerTransportCredentials("", "testing/tls/server.crt", "testing/tls/server.key", false)
+	serverCreds, err := ServerTransportCredentials("", "internal/testing/tls/server.crt", "internal/testing/tls/server.key", false)
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
@@ -65,11 +64,11 @@ func TestInsecureClientTLS(t *testing.T) {
 }
 
 func TestClientCertTLS(t *testing.T) {
-	serverCreds, err := ServerTransportCredentials("testing/tls/ca.crt", "testing/tls/server.crt", "testing/tls/server.key", false)
+	serverCreds, err := ServerTransportCredentials("internal/testing/tls/ca.crt", "internal/testing/tls/server.crt", "internal/testing/tls/server.key", false)
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
-	clientCreds, err := ClientTransportCredentials(false, "testing/tls/ca.crt", "testing/tls/client.crt", "testing/tls/client.key")
+	clientCreds, err := ClientTransportCredentials(false, "internal/testing/tls/ca.crt", "internal/testing/tls/client.crt", "internal/testing/tls/client.key")
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
@@ -84,11 +83,11 @@ func TestClientCertTLS(t *testing.T) {
 }
 
 func TestRequireClientCertTLS(t *testing.T) {
-	serverCreds, err := ServerTransportCredentials("testing/tls/ca.crt", "testing/tls/server.crt", "testing/tls/server.key", true)
+	serverCreds, err := ServerTransportCredentials("internal/testing/tls/ca.crt", "internal/testing/tls/server.crt", "internal/testing/tls/server.key", true)
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
-	clientCreds, err := ClientTransportCredentials(false, "testing/tls/ca.crt", "testing/tls/client.crt", "testing/tls/client.key")
+	clientCreds, err := ClientTransportCredentials(false, "internal/testing/tls/ca.crt", "internal/testing/tls/client.crt", "internal/testing/tls/client.key")
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
@@ -103,35 +102,53 @@ func TestRequireClientCertTLS(t *testing.T) {
 }
 
 func TestBrokenTLS_ClientPlainText(t *testing.T) {
-	serverCreds, err := ServerTransportCredentials("", "testing/tls/server.crt", "testing/tls/server.key", false)
+	serverCreds, err := ServerTransportCredentials("", "internal/testing/tls/server.crt", "internal/testing/tls/server.key", false)
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
 
 	// client connection (usually) succeeds since client is not waiting for TLS handshake
-	e, err := createTestServerAndClient(serverCreds, nil)
-	if err != nil {
-		if strings.Contains(err.Error(), "deadline exceeded") {
-			// It is possible that connection never becomes healthy:
+	// (we try several times, but if we never get a connection and the error message is
+	// a known/expected possibility, we'll just bail)
+	var e testEnv
+	failCount := 0
+	for {
+		e, err = createTestServerAndClient(serverCreds, nil)
+		if err == nil {
+			// success!
+			defer e.Close()
+			break
+		}
+
+		if strings.Contains(err.Error(), "deadline exceeded") ||
+			strings.Contains(err.Error(), "use of closed network connection") {
+			// It is possible that the connection never becomes healthy:
 			//   1) grpc connects successfully
 			//   2) grpc client tries to send HTTP/2 preface and settings frame
 			//   3) server, expecting handshake, closes the connection
 			//   4) in the client, the write fails, so the connection never
 			//      becomes ready
-			// More often than not, the connection becomes ready (presumably
-			// the write to the socket succeeds before the server closes the
-			// connection). But when it does not, it is possible to observe
-			// timeouts when setting up the connection.
-			return
+			// The client will attempt to reconnect on transient errors, so
+			// may eventually bump into the connect time limit. This used to
+			// result in a "deadline exceeded" error, but more recent versions
+			// of the grpc library report any underlying I/O error instead, so
+			// we also check for "use of closed network connection".
+			failCount++
+			if failCount > 5 {
+				return // bail...
+			}
+			// we'll try again
+
+		} else {
+			// some other error occurred, so we'll consider that a test failure
+			t.Fatalf("failed to setup server and client: %v", err)
 		}
-		t.Fatalf("failed to setup server and client: %v", err)
 	}
-	defer e.Close()
 
 	// but request fails because server closes connection upon seeing request
 	// bytes that are not a TLS handshake
-	cl := grpc_testing.NewTestServiceClient(e.cc)
-	_, err = cl.UnaryCall(context.Background(), &grpc_testing.SimpleRequest{})
+	cl := grpcurl_testing.NewTestServiceClient(e.cc)
+	_, err = cl.UnaryCall(context.Background(), &grpcurl_testing.SimpleRequest{})
 	if err == nil {
 		t.Fatal("expecting failure")
 	}
@@ -146,7 +163,7 @@ func TestBrokenTLS_ClientPlainText(t *testing.T) {
 }
 
 func TestBrokenTLS_ServerPlainText(t *testing.T) {
-	clientCreds, err := ClientTransportCredentials(false, "testing/tls/ca.crt", "", "")
+	clientCreds, err := ClientTransportCredentials(false, "internal/testing/tls/ca.crt", "", "")
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
@@ -162,11 +179,11 @@ func TestBrokenTLS_ServerPlainText(t *testing.T) {
 }
 
 func TestBrokenTLS_ServerUsesWrongCert(t *testing.T) {
-	serverCreds, err := ServerTransportCredentials("", "testing/tls/other.crt", "testing/tls/other.key", false)
+	serverCreds, err := ServerTransportCredentials("", "internal/testing/tls/other.crt", "internal/testing/tls/other.key", false)
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
-	clientCreds, err := ClientTransportCredentials(false, "testing/tls/ca.crt", "", "")
+	clientCreds, err := ClientTransportCredentials(false, "internal/testing/tls/ca.crt", "", "")
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
@@ -182,11 +199,11 @@ func TestBrokenTLS_ServerUsesWrongCert(t *testing.T) {
 }
 
 func TestBrokenTLS_ClientHasExpiredCert(t *testing.T) {
-	serverCreds, err := ServerTransportCredentials("testing/tls/ca.crt", "testing/tls/server.crt", "testing/tls/server.key", false)
+	serverCreds, err := ServerTransportCredentials("internal/testing/tls/ca.crt", "internal/testing/tls/server.crt", "internal/testing/tls/server.key", false)
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
-	clientCreds, err := ClientTransportCredentials(false, "testing/tls/ca.crt", "testing/tls/expired.crt", "testing/tls/expired.key")
+	clientCreds, err := ClientTransportCredentials(false, "internal/testing/tls/ca.crt", "internal/testing/tls/expired.crt", "internal/testing/tls/expired.key")
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
@@ -202,11 +219,11 @@ func TestBrokenTLS_ClientHasExpiredCert(t *testing.T) {
 }
 
 func TestBrokenTLS_ServerHasExpiredCert(t *testing.T) {
-	serverCreds, err := ServerTransportCredentials("", "testing/tls/expired.crt", "testing/tls/expired.key", false)
+	serverCreds, err := ServerTransportCredentials("", "internal/testing/tls/expired.crt", "internal/testing/tls/expired.key", false)
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
-	clientCreds, err := ClientTransportCredentials(false, "testing/tls/ca.crt", "", "")
+	clientCreds, err := ClientTransportCredentials(false, "internal/testing/tls/ca.crt", "", "")
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
@@ -222,11 +239,11 @@ func TestBrokenTLS_ServerHasExpiredCert(t *testing.T) {
 }
 
 func TestBrokenTLS_ClientNotTrusted(t *testing.T) {
-	serverCreds, err := ServerTransportCredentials("testing/tls/ca.crt", "testing/tls/server.crt", "testing/tls/server.key", true)
+	serverCreds, err := ServerTransportCredentials("internal/testing/tls/ca.crt", "internal/testing/tls/server.crt", "internal/testing/tls/server.key", true)
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
-	clientCreds, err := ClientTransportCredentials(false, "testing/tls/ca.crt", "testing/tls/wrong-client.crt", "testing/tls/wrong-client.key")
+	clientCreds, err := ClientTransportCredentials(false, "internal/testing/tls/ca.crt", "internal/testing/tls/wrong-client.crt", "internal/testing/tls/wrong-client.key")
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
@@ -242,11 +259,11 @@ func TestBrokenTLS_ClientNotTrusted(t *testing.T) {
 }
 
 func TestBrokenTLS_ServerNotTrusted(t *testing.T) {
-	serverCreds, err := ServerTransportCredentials("", "testing/tls/server.crt", "testing/tls/server.key", false)
+	serverCreds, err := ServerTransportCredentials("", "internal/testing/tls/server.crt", "internal/testing/tls/server.key", false)
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
-	clientCreds, err := ClientTransportCredentials(false, "", "testing/tls/client.crt", "testing/tls/client.key")
+	clientCreds, err := ClientTransportCredentials(false, "", "internal/testing/tls/client.crt", "internal/testing/tls/client.key")
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
@@ -262,11 +279,11 @@ func TestBrokenTLS_ServerNotTrusted(t *testing.T) {
 }
 
 func TestBrokenTLS_RequireClientCertButNonePresented(t *testing.T) {
-	serverCreds, err := ServerTransportCredentials("testing/tls/ca.crt", "testing/tls/server.crt", "testing/tls/server.key", true)
+	serverCreds, err := ServerTransportCredentials("internal/testing/tls/ca.crt", "internal/testing/tls/server.crt", "internal/testing/tls/server.key", true)
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
-	clientCreds, err := ClientTransportCredentials(false, "testing/tls/ca.crt", "", "")
+	clientCreds, err := ClientTransportCredentials(false, "internal/testing/tls/ca.crt", "", "")
 	if err != nil {
 		t.Fatalf("failed to create server creds: %v", err)
 	}
@@ -282,10 +299,10 @@ func TestBrokenTLS_RequireClientCertButNonePresented(t *testing.T) {
 }
 
 func simpleTest(t *testing.T, cc *grpc.ClientConn) {
-	cl := grpc_testing.NewTestServiceClient(cc)
+	cl := grpcurl_testing.NewTestServiceClient(cc)
 	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
 	defer cancel()
-	_, err := cl.UnaryCall(ctx, &grpc_testing.SimpleRequest{}, grpc.FailFast(false))
+	_, err := cl.UnaryCall(ctx, &grpcurl_testing.SimpleRequest{}, grpc.WaitForReady(true))
 	if err != nil {
 		t.Errorf("simple RPC failed: %v", err)
 	}
@@ -305,7 +322,7 @@ func createTestServerAndClient(serverCreds, clientCreds credentials.TransportCre
 		svrOpts = []grpc.ServerOption{grpc.Creds(serverCreds)}
 	}
 	svr := grpc.NewServer(svrOpts...)
-	grpc_testing.RegisterTestServiceServer(svr, grpcurl_testing.TestServer{})
+	grpcurl_testing.RegisterTestServiceServer(svr, grpcurl_testing.TestServer{})
 	l, err := net.Listen("tcp", "127.0.0.1:0")
 	if err != nil {
 		return e, err