snapshot of https://github.com/grpc/grpc-go.git (master, 2026-09-15; blobs > 131072B omitted)

examples/features/compression/README.md

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+# Compression
+
+This example shows how clients can specify compression options when performing
+RPCs, and how to install support for compressors on the server.  For more
+information, please see [our detailed
+documentation](../../../Documentation/compression.md).
+
+```
+go run server/main.go
+```
+
+```
+go run client/main.go
+```

examples/features/compression/client/main.go

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+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * 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.
+ *
+ */
+
+// Binary client demonstrates how to specify compression options when performing
+// RPCs.
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"log"
+	"time"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
+	"google.golang.org/grpc/encoding/gzip" // Install the gzip compressor
+	pb "google.golang.org/grpc/examples/features/proto/echo"
+)
+
+var addr = flag.String("addr", "localhost:50051", "the address to connect to")
+
+func main() {
+	flag.Parse()
+
+	// Set up a connection to the server.
+	conn, err := grpc.NewClient(*addr, grpc.WithTransportCredentials(insecure.NewCredentials()))
+	if err != nil {
+		log.Fatalf("did not connect: %v", err)
+	}
+	defer conn.Close()
+
+	c := pb.NewEchoClient(conn)
+
+	// Send the RPC compressed.  If all RPCs on a client should be sent this
+	// way, use the DialOption:
+	// grpc.WithDefaultCallOptions(grpc.UseCompressor(gzip.Name))
+	const msg = "compress"
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+	res, err := c.UnaryEcho(ctx, &pb.EchoRequest{Message: msg}, grpc.UseCompressor(gzip.Name))
+	fmt.Printf("UnaryEcho call returned %q, %v\n", res.GetMessage(), err)
+	if err != nil || res.GetMessage() != msg {
+		log.Fatalf("Message=%q, err=%v; want Message=%q, err=<nil>", res.GetMessage(), err, msg)
+	}
+
+}

examples/features/compression/server/main.go

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+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * 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.
+ *
+ */
+
+// Binary server demonstrates how to install and support compressors for
+// incoming RPCs.
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"log"
+	"net"
+
+	"google.golang.org/grpc"
+	// Installing the gzip encoding registers it as an available compressor.
+	// gRPC will automatically negotiate and use gzip if the client supports it.
+	_ "google.golang.org/grpc/encoding/gzip"
+
+	pb "google.golang.org/grpc/examples/features/proto/echo"
+)
+
+var port = flag.Int("port", 50051, "the port to serve on")
+
+type server struct {
+	pb.UnimplementedEchoServer
+}
+
+func (s *server) UnaryEcho(_ context.Context, in *pb.EchoRequest) (*pb.EchoResponse, error) {
+	fmt.Printf("UnaryEcho called with message %q\n", in.GetMessage())
+	return &pb.EchoResponse{Message: in.Message}, nil
+}
+
+func main() {
+	flag.Parse()
+
+	lis, err := net.Listen("tcp", fmt.Sprintf(":%d", *port))
+	if err != nil {
+		log.Fatalf("failed to listen: %v", err)
+	}
+	fmt.Printf("server listening at %v\n", lis.Addr())
+
+	s := grpc.NewServer()
+	pb.RegisterEchoServer(s, &server{})
+	s.Serve(lis)
+}