adds tests

cmd/grpcurl/formatting_test.go

@@ -0,0 +1,303 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"strings"
+	"testing"
+
+	"github.com/golang/protobuf/jsonpb"
+	"github.com/golang/protobuf/proto"
+	"github.com/golang/protobuf/ptypes/struct"
+	"github.com/jhump/protoreflect/desc"
+	"google.golang.org/grpc/metadata"
+
+	"github.com/fullstorydev/grpcurl"
+)
+
+func TestRequestFactory(t *testing.T) {
+	source, err := grpcurl.DescriptorSourceFromProtoSets("../../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         string
+		input          string
+		expectedOutput []proto.Message
+	}{
+		{
+			format: "json",
+			input:  "",
+		},
+		{
+			format:         "json",
+			input:          messageAsJSON,
+			expectedOutput: []proto.Message{msg},
+		},
+		{
+			format:         "json",
+			input:          messageAsJSON + messageAsJSON + messageAsJSON,
+			expectedOutput: []proto.Message{msg, msg, msg},
+		},
+		{
+			// unlike JSON, empty input yields one empty message (vs. zero messages)
+			format:         "text",
+			input:          "",
+			expectedOutput: []proto.Message{&structpb.Value{}},
+		},
+		{
+			format:         "text",
+			input:          messageAsText,
+			expectedOutput: []proto.Message{msg},
+		},
+		{
+			format:         "text",
+			input:          messageAsText + string(textSeparatorChar),
+			expectedOutput: []proto.Message{msg, &structpb.Value{}},
+		},
+		{
+			format:         "text",
+			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, _ := formatDetails(tc.format, source, false, strings.NewReader(tc.input))
+		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 := grpcurl.DescriptorSourceFromProtoSets("../../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 []string{"json", "text"} {
+		for _, numMessages := range []int{1, 3} {
+			for _, verbose := range []bool{true, false} {
+				name := fmt.Sprintf("%s, %d message(s)", format, numMessages)
+				if verbose {
+					name += ", verbose"
+				}
+
+				_, formatter := formatDetails(format, source, verbose, nil)
+
+				var buf bytes.Buffer
+				h := handler{
+					out:        &buf,
+					descSource: source,
+					verbose:    verbose,
+					formatter:  formatter,
+				}
+
+				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 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.", name) // 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:
+{
+  "name": "GetFiles",
+  "inputType": ".TestRequest",
+  "outputType": ".TestResponse",
+  "options": {
+    
+  }
+}
+
+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
+`
+	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
+    >
+  >
+>
+`
+)

cmd/grpcurl/grpcurl.go

@@ -65,21 +65,22 @@ var (
 	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.")
+		`: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", "",
 		`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
     	(optionally separated by whitespace).`)
-	format = flag.String("format", "",
+	format = flag.String("format", "json",
-		`The format of request data. The allowed values are 'json' (the default)
+		`The format of request data. The allowed values are 'json' or 'text'. For
-    	or 'text'. For 'json', the input data must be in JSON format. Multiple
+    	'json', the input data must be in JSON format. Multiple request values may
-    	request values may be concatenated (messages with a JSON representation
+    	be concatenated (messages with a JSON representation other than object
-    	other than Object must be separated by whitespace, such as a newline). For
+    	must be separated by whitespace, such as a newline). For 'text', the input
-    	'text', the input data must be in the protobuf text format, in which case
+    	data must be in the protobuf text format, in which case multiple request
-    	multiple request values must be separated by the "record separate" ASCII
+    	values must be separated by the "record separate" ASCII character: 0x1E.
-    	character: 0x1E. The stream should not end in a record separator. If it
+    	The stream should not end in a record separator. If it does, it will be
-    	does, it will be interpreted as a final, blank message after the separator.`)
+    	interpreted as a final, blank message after the separator.`)
 	connectTimeout = flag.String("connect-timeout", "",
 		`The maximum time, in seconds, to wait for connection to be established.
     	Defaults to 10 seconds.`)
@@ -180,7 +181,7 @@ func main() {
 	if (*key == "") != (*cert == "") {
 		fail(nil, "The -cert and -key arguments must be used together and both be present.")
 	}
-	if *format != "" && *format != "json" && *format != "text" {
+	if *format != "json" && *format != "text" {
 		fail(nil, "The -format option must be 'json' or 'text.")
 	}
 
@@ -432,7 +433,7 @@ func main() {
 				// create a request to invoke an RPC
 				tmpl := makeTemplate(dynamic.NewMessage(dsc))
 				fmt.Println("\nMessage template:")
-				if *format == "" || *format == "json" {
+				if *format == "json" {
 					jsm := jsonpb.Marshaler{Indent: "  ", EmitDefaults: true}
 					err := jsm.Marshal(os.Stdout, tmpl)
 					if err != nil {
@@ -460,24 +461,12 @@ func main() {
 			in = strings.NewReader(*data)
 		}
 
-		var rf requestFactory
+		rf, formatter := formatDetails(*format, descSource, *verbose, in)
-		var h handler
+		h := handler{
-		if *format == "" || *format == "json" {
+			out:        os.Stdout,
-			resolver, err := anyResolver(descSource)
+			descSource: descSource,
-			if err != nil {
+			formatter:  formatter,
-				fail(err, "Error creating message resolver")
+			verbose:    *verbose,
-			}
-			rf = newJsonFactory(in, resolver)
-			h = handler{
-				descSource: descSource,
-				marshaler: jsonpb.Marshaler{
-					EmitDefaults: *emitDefaults,
-					AnyResolver:  resolver,
-				},
-			}
-		} else {
-			rf = newTextFactory(in)
-			h = handler{descSource: descSource}
 		}
 
 		err := grpcurl.InvokeRPC(ctx, descSource, cc, symbol, append(addlHeaders, rpcHeaders...), &h, rf.next)
@@ -568,63 +557,74 @@ func anyResolver(source grpcurl.DescriptorSource) (jsonpb.AnyResolver, error) {
 	return dynamic.AnyResolver(mf, files...), nil
 }
 
+func formatDetails(format string, descSource grpcurl.DescriptorSource, verbose bool, in io.Reader) (requestFactory, func(proto.Message) (string, error)) {
+	if format == "json" {
+		resolver, err := anyResolver(descSource)
+		if err != nil {
+			fail(err, "Error creating message resolver")
+		}
+		marshaler := jsonpb.Marshaler{
+			EmitDefaults: *emitDefaults,
+			Indent:       "  ",
+			AnyResolver:  resolver,
+		}
+		return newJsonFactory(in, resolver), marshaler.MarshalToString
+	}
+	/* else *format == "text" */
+
+	// if not verbose output, then also include record delimiters
+	// before each message (other than the first) so output could
+	// potentially piped to another grpcurl process
+	tf := textFormatter{useSeparator: !verbose}
+	return newTextFactory(in), tf.format
+}
+
 type handler struct {
+	out        io.Writer
 	descSource grpcurl.DescriptorSource
 	respCount  int
 	stat       *status.Status
-	marshaler  jsonpb.Marshaler
+	formatter  func(proto.Message) (string, error)
+	verbose    bool
 }
 
 func (h *handler) OnResolveMethod(md *desc.MethodDescriptor) {
-	if *verbose {
+	if h.verbose {
 		txt, err := grpcurl.GetDescriptorText(md, h.descSource)
 		if err == nil {
-			fmt.Printf("\nResolved method descriptor:\n%s\n", txt)
+			fmt.Fprintf(h.out, "\nResolved method descriptor:\n%s\n", txt)
 		}
 	}
 }
 
-func (*handler) OnSendHeaders(md metadata.MD) {
+func (h *handler) OnSendHeaders(md metadata.MD) {
-	if *verbose {
+	if h.verbose {
-		fmt.Printf("\nRequest metadata to send:\n%s\n", grpcurl.MetadataToString(md))
+		fmt.Fprintf(h.out, "\nRequest metadata to send:\n%s\n", grpcurl.MetadataToString(md))
 	}
 }
 
-func (*handler) OnReceiveHeaders(md metadata.MD) {
+func (h *handler) OnReceiveHeaders(md metadata.MD) {
-	if *verbose {
+	if h.verbose {
-		fmt.Printf("\nResponse headers received:\n%s\n", grpcurl.MetadataToString(md))
+		fmt.Fprintf(h.out, "\nResponse headers received:\n%s\n", grpcurl.MetadataToString(md))
 	}
 }
 
-const rs = string(0x1e)
-
 func (h *handler) OnReceiveResponse(resp proto.Message) {
 	h.respCount++
-	if *verbose {
+	if h.verbose {
-		fmt.Print("\nResponse contents:\n")
+		fmt.Fprint(h.out, "\nResponse contents:\n")
-	}
-	var respStr string
-	var err error
-	if *format == "" || *format == "json" {
-		respStr, err = h.marshaler.MarshalToString(resp)
-	} else /* *format == "text" */ {
-		respStr = proto.MarshalTextString(resp)
-		if !*verbose {
-			// if not verbose output, then also include record delimiters,
-			// so output could potentially piped to another grpcurl process
-			respStr = respStr + rs
-		}
 	}
+	respStr, err := h.formatter(resp)
 	if err != nil {
 		fail(err, "failed to generate JSON form of response message")
 	}
-	fmt.Println(respStr)
+	fmt.Fprintln(h.out, respStr)
 }
 
 func (h *handler) OnReceiveTrailers(stat *status.Status, md metadata.MD) {
 	h.stat = stat
-	if *verbose {
+	if h.verbose {
-		fmt.Printf("\nResponse trailers received:\n%s\n", grpcurl.MetadataToString(md))
+		fmt.Fprintf(h.out, "\nResponse trailers received:\n%s\n", grpcurl.MetadataToString(md))
 	}
 }
 
@@ -720,6 +720,10 @@ func (f *jsonFactory) numRequests() int {
 	return f.requestCount
 }
 
+const (
+	textSeparatorChar = 0x1e
+)
+
 type textFactory struct {
 	r            *bufio.Reader
 	err          error
@@ -736,18 +740,47 @@ func (f *textFactory) next(m proto.Message) error {
 	}
 
 	var b []byte
-	b, f.err = f.r.ReadBytes(0x1e)
+	b, f.err = f.r.ReadBytes(textSeparatorChar)
 	if f.err != nil && f.err != io.EOF {
 		return f.err
 	}
 	// remove delimiter
-	if b[len(b)-1] == 0x1e {
+	if len(b) > 0 && b[len(b)-1] == textSeparatorChar {
 		b = b[:len(b)-1]
 	}
 
+	f.requestCount++
+
 	return proto.UnmarshalText(string(b), m)
 }
 
 func (f *textFactory) numRequests() int {
 	return f.requestCount
 }
+
+type textFormatter struct {
+	useSeparator bool
+	numFormatted int
+}
+
+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 err := proto.MarshalText(&buf, m); err != nil {
+		return "", err
+	}
+
+	// no trailing newline needed
+	str := buf.String()
+	if str[len(str)-1] == '\n' {
+		str = str[:len(str)-1]
+	}
+
+	tf.numFormatted++
+
+	return str, nil
+}

grpcurl.go

@@ -783,16 +783,29 @@ func MetadataToString(md metadata.MD) string {
 	if len(md) == 0 {
 		return "(empty)"
 	}
+
+	keys := make([]string, 0, len(md))
+	for k := range md {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+
 	var b bytes.Buffer
-	for k, vs := range md {
+	first := true
+	for _, k := range keys {
+		vs := md[k]
 		for _, v := range vs {
+			if first {
+				first = false
+			} else {
+				b.WriteString("\n")
+			}
 			b.WriteString(k)
 			b.WriteString(": ")
 			if strings.HasSuffix(k, "-bin") {
 				v = base64.StdEncoding.EncodeToString([]byte(v))
 			}
 			b.WriteString(v)
-			b.WriteString("\n")
 		}
 	}
 	return b.String()

grpcurl_test.go

@@ -44,6 +44,10 @@ 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")
@@ -235,6 +239,73 @@ func doTestListMethods(t *testing.T, source DescriptorSource, includeReflection
 	}
 }
 
+func TestGetAllFiles(t *testing.T) {
+	expectedFiles := []string{"testing/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", "grpc_testing/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)
+			expected := expectedFiles
+			if ds.includeRefl {
+				expected = expectedFilesWithReflection
+			}
+			if !reflect.DeepEqual(expected, names) {
+				t.Errorf("GetAllFiles returned wrong results: wanted %v, got %v", expected, names)
+			}
+		})
+	}
+
+	// try cases with more complicated set of files
+	otherSourceProtoset, err := DescriptorSourceFromProtoSets("testing/test.protoset", "testing/example.protoset")
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	otherSourceProtoFiles, err := DescriptorSourceFromProtoFiles(nil, "testing/test.proto", "testing/example.proto")
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	otherDescSources := []descSourceCase{
+		{"protoset[b]", otherSourceProtoset, false},
+		{"proto[b]", otherSourceProtoFiles, false},
+	}
+	expectedFiles = []string{
+		"google/protobuf/any.proto",
+		"google/protobuf/descriptor.proto",
+		"google/protobuf/empty.proto",
+		"google/protobuf/timestamp.proto",
+		"testing/example.proto",
+		"testing/example2.proto",
+		"testing/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 fileNames(files []*desc.FileDescriptor) []string {
+	names := make([]string, len(files))
+	for i, f := range files {
+		names[i] = f.GetName()
+	}
+	return names
+}
+
 func TestDescribe(t *testing.T) {
 	for _, ds := range descSources {
 		t.Run(ds.name, func(t *testing.T) {

mk-test-files.sh

@@ -7,8 +7,8 @@ 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 \
+protoc testing/test.proto \
-	-I../../../ --include_imports \
+	--include_imports \
 	--descriptor_set_out=testing/test.protoset
 
 protoc testing/example.proto \

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 "testing/example2.proto";
 
 message TestRequest {
 	repeated string file_names = 1;
+	repeated Extension extensions = 2;
 }
 
 message TestResponse {

testing/example2.proto

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