背景
最近在用gRPC框架测试,想起去年调研Protocol Buffer在HTTP的时候传输,了解过这个框架,当时没深入。这次做gRPC服务器端,随便看下iOS这边实现方式,附上测试代码。
demo地址: https://github.com/fanlv/gRPCDemo
proto文件
package user;
message LoginRequest {
string username = 1;
string password = 2;
}
message BaseResponse{
int64 code = 1;
string msg = 2;
}
message User{
string uid = 1;
string name = 2;
string logo = 3;
}
message LoginResponse {
User user = 1;
BaseResponse baseResp = 255;
}
//service 名称,客户端会用这个去调用对应方法
service Greeter {
//提供的RPC方法
rpc Login (LoginRequest) returns (LoginResponse) {}
}
生成go代码
--objc_out=plugins=grpc:. user.proto
生成oc代码
protoc --objc_out=. --grpc_out=. --plugin=protoc-gen-grpc=/usr/local/bin/grpc_objective_c_plugin user.proto
服务器代码实现(Go)
package main
import (
pb "gitee.com/xxxx/proto"//执行你生成的user.pb.go位置
"golang.org/x/net/context"
"net"
"google.golang.org/grpc"
"google.golang.org/grpc/reflection"
"log"
)
const (
port = ":50051"
)
type server struct{}
func (s *server) Login(ctx context.Context, in *pb.LoginRequest) (*pb.LoginResponse, error) {
var resp *pb.LoginResponse
if in.Username =="test" && in.Password == "123456" {
resp = &pb.LoginResponse{
User:&pb.User{
Uid:"001",
Name:"test",
Logo:"https://test.com/test.png",
},
BaseResp:&pb.BaseResponse{
Code:0,
Msg:"ok",
},
}
}else {
resp = &pb.LoginResponse{
User:nil,
BaseResp:&pb.BaseResponse{
Code:1,
Msg:"login fail",
},
}
}
return resp,nil
}
func main() {
lis, err := net.Listen("tcp", port)
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)
}
}
客户端端代码(iOS)
可以先去官网下一个Demo项目,地址:grpc.io - objective-c
里面有三个demo,我这里借用的helloworld的demo,路径:grpc/examples/objective-c/helloworld
。
执行pod install,主要会用到下面几个库
Installing !ProtoCompiler (3.5.0)
Installing !ProtoCompiler-gRPCPlugin (1.13.0)
Installing BoringSSL (10.0.5)
Installing Protobuf (3.6.0)
Installing gRPC (1.13.0)
Installing gRPC-Core (1.13.0)
Installing gRPC-ProtoRPC (1.13.0)
Installing gRPC-RxLibrary (1.13.0)
Installing nanopb (0.3.8)
把生成的四个pb文件(User.pbobjc.h
、User.pbobjc.m
、User.pbrpc.h
、User.pbrpc.m
)添加到项目中去。然后在main.m中添加下面的测试代码
Greeter *userClient = [[Greeter alloc] initWithHost:kHostAddress];
LoginRequest *req = [[LoginRequest alloc] init];
req.username = @"test";
req.password = @"123456";
[userClient loginWithRequest:req handler:^(LoginResponse * _Nullable response, NSError * _Nullable error) {
if (!error) {
if (response.baseResp.code == 0) {
NSLog(@"%@",response.user.name);
}else{
NSLog(@"error :%@",response.baseResp.msg);
}
}else{
NSLog(@"%@",error);
}
}];
调用上面方法可以看到能够正常返回数据。Over
网友评论