gateway: Rename gateway files to have "gateway-" prefix (#4207)

cmd/gateway-s3-anonymous.go

@@ -0,0 +1,83 @@
+/*
+ * Minio Cloud Storage, (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import "io"
+
+// AnonGetObject - Get object anonymously
+func (l *s3Gateway) AnonGetObject(bucket string, key string, startOffset int64, length int64, writer io.Writer) error {
+	object, err := l.anonClient.GetObject(bucket, key)
+	if err != nil {
+		return s3ToObjectError(traceError(err), bucket, key)
+	}
+
+	defer object.Close()
+
+	object.Seek(startOffset, io.SeekStart)
+	if _, err := io.CopyN(writer, object, length); err != nil {
+		return s3ToObjectError(traceError(err), bucket, key)
+	}
+
+	return nil
+}
+
+// AnonGetObjectInfo - Get object info anonymously
+func (l *s3Gateway) AnonGetObjectInfo(bucket string, object string) (ObjectInfo, error) {
+	oi, err := l.anonClient.StatObject(bucket, object)
+	if err != nil {
+		return ObjectInfo{}, s3ToObjectError(traceError(err), bucket, object)
+	}
+
+	return fromMinioClientObjectInfo(bucket, oi), nil
+}
+
+// AnonListObjects - List objects anonymously
+func (l *s3Gateway) AnonListObjects(bucket string, prefix string, marker string, delimiter string, maxKeys int) (ListObjectsInfo, error) {
+	result, err := l.anonClient.ListObjects(bucket, prefix, marker, delimiter, maxKeys)
+	if err != nil {
+		return ListObjectsInfo{}, s3ToObjectError(traceError(err), bucket)
+	}
+
+	return fromMinioClientListBucketResult(bucket, result), nil
+}
+
+// AnonGetBucketInfo - Get bucket metadata anonymously.
+func (l *s3Gateway) AnonGetBucketInfo(bucket string) (BucketInfo, error) {
+	if exists, err := l.anonClient.BucketExists(bucket); err != nil {
+		return BucketInfo{}, s3ToObjectError(traceError(err), bucket)
+	} else if !exists {
+		return BucketInfo{}, traceError(BucketNotFound{Bucket: bucket})
+	}
+
+	buckets, err := l.anonClient.ListBuckets()
+	if err != nil {
+		return BucketInfo{}, s3ToObjectError(traceError(err), bucket)
+	}
+
+	for _, bi := range buckets {
+		if bi.Name != bucket {
+			continue
+		}
+
+		return BucketInfo{
+			Name:    bi.Name,
+			Created: bi.CreationDate,
+		}, nil
+	}
+
+	return BucketInfo{}, traceError(BucketNotFound{Bucket: bucket})
+}