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

examples/features/cancellation/server/main.go

@@ -0,0 +1,67 @@
+/*
+ *
+ * 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 handle canceled contexts when a client
+// cancels an in-flight RPC.
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io"
+	"log"
+	"net"
+
+	"google.golang.org/grpc"
+
+	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) BidirectionalStreamingEcho(stream pb.Echo_BidirectionalStreamingEchoServer) error {
+	for {
+		in, err := stream.Recv()
+		if err != nil {
+			fmt.Printf("server: error receiving from stream: %v\n", err)
+			if err == io.EOF {
+				return nil
+			}
+			return err
+		}
+		fmt.Printf("echoing message %q\n", in.Message)
+		stream.Send(&pb.EchoResponse{Message: in.Message})
+	}
+}
+
+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 port %v\n", lis.Addr())
+	s := grpc.NewServer()
+	pb.RegisterEchoServer(s, &server{})
+	s.Serve(lis)
+}