4 modes of Client-to-Server data interaction in GRPC

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Project Address: Grpc-modes

Recently, using the GRPC introductory microservices development, we summarize the 4 modes of operation in GRPC

Directory structure

$GOPATH└── grpc    ├── simple                  // 简单模式 RPC    │   ├── client        │   │   └── client.go        # 客户端代码    │   ├── proto                │   │   ├── user.pb.go        │   │   └── user.proto       # 通信的 protobuf 协议    │   └── server    │       └── server.go        # 服务端代码    ├── server-side-streaming    // 服务端流式 RPC     ├── client-side-streaming    // 客户端流式 RPC     └── bidirectional-streaming  // 客户端与服务端双向流式 RPC

UserService Micro-Service

A microservices is defined in this project: UserService it has only one RPC:GetUserInfo()

syntax = "proto3";package grpc.simple;// 定义 UserService 微服务service UserService {    // 微服务中获取用户信息的 RPC 函数    rpc GetUserInfo (UserRequest) returns (UserResponse);}// 客户端请求的格式message UserRequest {    int32 ID = 1;}// 服务端响应的格式message UserResponse {    string name = 1;    int32 age = 2;}

GetUserInfo()simulates a database in a function that stores the user's name and age:

// ID 为 key，用户信息为 value 模拟数据库查询结果var users = map[int32]pb.UserResponse{    1: {Name: "Dennis MacAlistair Ritchie", Age: 70},    2: {Name: "Ken Thompson", Age: 75},    3: {Name: "Rob Pike", Age: 62},}

The client requests the ID, and returns the user information as a response after the query.

Four modes of data interaction between client and server

Simpe Simple Mode RPC

The client initiates a request to the service side, and the server returns a response.

The client requests the user data with ID 2, and the server returns the user data with ID 2:

Server-side streaming service-side streaming RPC

The client initiates a request to the service side, and the server returns a continuous stream of traffic response.

The client requests 1 of the user data, and the server returns 1, 2, 3 of the user data stream:

Client-side streaming client-side streaming RPC

The client sends a continuous stream of traffic to the server, and the server returns a response.

The client requests 1, 2, 3 of the user data stream, and the server returns 3 of the user data:

Grpc of bidirectional streaming bidirectional data flow mode

The client sends a continuous stream of traffic to the server, and the server returns the interactive data stream.

The client requests 1, 2, 3 of the user data stream in turn, and the server returns 1, 2, and 3 of the user data stream:

At last

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