add grpc example (gin-gonic#1401)

use grpc helloworld example.
MilesLin · Jun 22, 2018 · 737d2fb · 737d2fb
1 parent bf85b32
commit 737d2fb
Showing 7 changed files with 290 additions and 2 deletions.
diff --git a/Makefile b/Makefile
@@ -1,5 +1,6 @@
 GOFMT ?= gofmt "-s"
 PACKAGES ?= $(shell go list ./... | grep -v /vendor/)
+VETPACKAGES ?= $(shell go list ./... | grep -v /vendor/ | grep -v /examples/)
 GOFILES := $(shell find . -name "*.go" -type f -not -path "./vendor/*")
 
 all: install
@@ -26,7 +27,7 @@ fmt-check:
 	fi;
 
 vet:
-	go vet $(PACKAGES)
+	go vet $(VETPACKAGES)
 
 deps:
 	@hash govendor > /dev/null 2>&1; if [ $$? -ne 0 ]; then \

diff --git a/coverage.sh b/coverage.sh
@@ -4,7 +4,7 @@ set -e
 
 echo "mode: count" > coverage.out
 
-for d in $(go list ./... | grep -E 'gin$|binding$|render$'); do
+for d in $(go list ./... | grep -E 'gin$|binding$|render$' | grep -v 'examples'); do
     go test -v -covermode=count -coverprofile=profile.out $d
     if [ -f profile.out ]; then
         cat profile.out | grep -v "mode:" >> coverage.out

diff --git a/examples/grpc/README.md b/examples/grpc/README.md
@@ -0,0 +1,19 @@
+## How to run this example
+
+1. run grpc server
+
+```sh
+$ go run grpc/server.go
+```
+
+2. run gin server
+
+```sh
+$ go run gin/main.go
+```
+
+3. use curl command to test it
+
+```sh
+$ curl -v 'http://localhost:8052/rest/n/thinkerou'
+```
diff --git a/examples/grpc/gin/main.go b/examples/grpc/gin/main.go
@@ -0,0 +1,46 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	pb "github.com/gin-gonic/gin/examples/grpc/pb"
+	"google.golang.org/grpc"
+)
+
+func main() {
+	// Set up a connection to the server.
+	conn, err := grpc.Dial("localhost:50051", grpc.WithInsecure())
+	if err != nil {
+		log.Fatalf("did not connect: %v", err)
+	}
+	defer conn.Close()
+	client := pb.NewGreeterClient(conn)
+
+	// Set up a http setver.
+	r := gin.Default()
+	r.GET("/rest/n/:name", func(c *gin.Context) {
+		name := c.Param("name")
+
+		// Contact the server and print out its response.
+		req := &pb.HelloRequest{Name: name}
+		res, err := client.SayHello(g, req)
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{
+				"error": err.Error(),
+			})
+			return
+		}
+
+		c.JSON(http.StatusOK, gin.H{
+			"result": fmt.Sprint(res.Message),
+		})
+	})
+
+	// Run http server
+	if err := r.Run(":8052"); err != nil {
+		log.Fatalf("could not run server: %v", err)
+	}
+}
diff --git a/examples/grpc/grpc/server.go b/examples/grpc/grpc/server.go
@@ -0,0 +1,34 @@
+package main
+
+import (
+	"log"
+	"net"
+
+	pb "github.com/gin-gonic/gin/examples/grpc/pb"
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/reflection"
+)
+
+// server is used to implement helloworld.GreeterServer.
+type server struct{}
+
+// SayHello implements helloworld.GreeterServer
+func (s *server) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
+	return &pb.HelloReply{Message: "Hello " + in.Name}, nil
+}
+
+func main() {
+	lis, err := net.Listen("tcp", ":50051")
+	if err != nil {
+		log.Fatalf("failed to listen: %v", err)
+	}
+	s := grpc.NewServer()
+	pb.RegisterGreeterServer(s, &server{})
+
+	// Register reflection service on gRPC server.
+	reflection.Register(s)
+	if err := s.Serve(lis); err != nil {
+		log.Fatalf("failed to serve: %v", err)
+	}
+}
diff --git a/examples/grpc/pb/helloworld.pb.go b/examples/grpc/pb/helloworld.pb.go
diff --git a/examples/grpc/pb/helloworld.proto b/examples/grpc/pb/helloworld.proto
@@ -0,0 +1,37 @@
+// Copyright 2015 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.
+
+syntax = "proto3";
+
+option java_multiple_files = true;
+option java_package = "io.grpc.examples.helloworld";
+option java_outer_classname = "HelloWorldProto";
+
+package helloworld;
+
+// The greeting service definition.
+service Greeter {
+  // Sends a greeting
+  rpc SayHello (HelloRequest) returns (HelloReply) {}
+}
+
+// The request message containing the user's name.
+message HelloRequest {
+  string name = 1;
+}
+
+// The response message containing the greetings
+message HelloReply {
+  string message = 1;
+}