GO-Grpc微服务开发六 网关和http调用

proto文件定义

syntax = "proto3";
package kibana;
//引入google api实现http转rpc
import "google/api/annotations.proto";
//service name is kibana
service Kibana {
    //service method is write
    rpc Write(WriteRequest) returns (WriteResponse) {
        //定义http请求路由
        option (google.api.http) = {
            //路由
            post: "/v1/kibana/write"
            //参数为 request body
            body: "*"
        };
    }
}

//writer request struct
message WriteRequest {
    string tag = 1;
    string info = 2;
    string level = 3;
}

//writer response struct
message WriteResponse {
    int32 code = 1;
    string message = 2;
    map data = 3;
}

将定义的proto编译为go文件

//生成grpc文件
protoc --go_out=plugins=grpc:. kibana.proto
//生成网关文件 
//注意点：请先将google/api下载到/usr/local/include
protoc -I/usr/local/include -I. -I$GOPATH/src -I$GOPATH/src/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis --grpc-gateway_out=logtostderr=true:. kibana.proto

网关中注册服务

package main

import (
    "github.com/golang/glog"
    "golang.org/x/net/context"
    "github.com/grpc-ecosystem/grpc-gateway/runtime"
    "google.golang.org/grpc"
    "net/http"
    //引入刚生产的文件包 多个服务引入多个包
    kibana "micro-srv/service/kibana/proto"
    "micro-srv/common"
    "fmt"
)

var services = map[string]string{
    //这里加上我们的服务
    "kibana": "50061",
}

func run() error {
    ctx := context.Background()
    ctx, cancel := context.WithCancel(ctx)
    defer cancel()
    mux := runtime.NewServeMux()
    base := common.Common{}
    //获取服务地址
    server_host := base.GetVal("serveraddr")
    //注册http转grpc服务
    registerServerHandle(ctx, mux, server_host)
    return http.ListenAndServe(":8080", mux)
}

//注册http转grpc服务
func registerServerHandle(ctx context.Context, mux *runtime.ServeMux, server_host string)  {
    opts := []grpc.DialOption{grpc.WithInsecure()}
    var err error
    //注册服务 kibana 多个服务多次注册即可
    err = kibana.RegisterKibanaHandlerFromEndpoint(ctx, mux, server_host + ":" + services["kibana"], opts)
    if err != nil {
        fmt.Printf("kibana http is fail: %s", err.Error())
    }
}

func main() {
    defer glog.Flush()
    if err := run(); err != nil {
        glog.Fatal(err)
    }
}

http请求

• 确保网关中已注册服务
• 确保网关和服务已运行

curl

    curl -H "Content-Type:application/json" -X POST --data '{"tag":"micro_test", "info":"hello", "level":"info"}' http://127.0.0.1:5061/v1/kibana/write

beego

    url := "http://127.0.0.1:5061/v1/kibana/write"
    params := map[string]string{
        "tag": "micro_test", 
        "info": "hello", 
        "level": "info",
    }
    req := httplib.Post(url)
    req.JSONBody(params)
    con, err := req.Bytes()

源码：go-grpc-getway