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@qtk/tcp-framework

v3.0.1

Published

qtk微服务框架体系一环,为最底层的异步tcp请求框架。框架内部维护连接心跳,默认每20秒发送一个心跳包,30秒连接无响应超时。 **请求体/响应体必须为Buffer形式,框架不解析请求体/响应体内容,故数据协议开发者可以自行定义**。

Downloads

27

Readme

qtk-tcp-framework

qtk微服务框架体系一环,为最底层的异步tcp请求框架。框架内部维护连接心跳,默认每20秒发送一个心跳包,30秒连接无响应超时。 请求体/响应体必须为Buffer形式,框架不解析请求体/响应体内容,故数据协议开发者可以自行定义

Server初始化

  • host: 监听ip,默认localhost
  • port: 监听端口
  • heartbeat: 心跳包间隔(单位秒),默认20
  • timeout: 连接无响应超时(单位秒),默认30。(服务端不响应客户端请求情况不算连接超时,此时还有心跳包,故不会触发超时)
const server = new Server({ port: 8212 });

Client初始化

  • host: 服务端ip,默认localhost
  • port: 服务端端口
  • timeout: 连接无响应超时(单位秒),默认30。(服务端不响应客户端请求情况不算连接超时,此时还有心跳包,故不会触发超时)
const client = new Client({ port: 8212 });

客户端发送请求

  • uuid: 36位uuid(含-), 每次请求的唯一标识
  • data: 请求体buffer
client.send({ uuid: uuid(), data: Buffer.from('echo') });

服务端接受请求

服务端监听data事件,回调函数包含两个参数:

  • socket: 客户端socket对象
  • 请求体信息:
    • uuid: 客户端某次请求的uuid
    • data: 请求体buffer
server.on('data', (socket, {uuid, data}) => {

})

服务端响应请求

服务端监听data事件,收到请求后,调用send方法响应本次客户端请求。send方法包含两个参数:

  • socket: 客户端socket对象
  • 响应体信息:
    • uuid: 响应客户端某次请求的uuid
    • data: 响应体buffer
server.on('data', (socket, {uuid, data}) => {
    server.send(socket, {uuid, data}); //原封不动返回data
})

客户端接受服务端响应

客户端监听data事件,回调函数包含一个参数:

  • 响应体信息:
    • uuid: 客户端某次请求的uuid
    • data: 响应体buffer
client.on('data', ({uuid, data}) => {

})

系统事件

Server

  • started: 服务端启动
  • stopped: 服务端停止
  • connected: 新的客户端连接,参数: (socket)
  • closed: 客户端断开,参数: (socket)
  • exception: 系统出错,参数: (socket, error)
  • data: 客户端请求, 参数: (socket, {uuid, data})

Client

  • connected: 连接服务端成功
  • closed: 连接关闭
  • exception: 系统出错,参数: (error)
  • data: 服务端响应, 参数: ({uuid, data})

Demo

//server.js
const Server = require('@qtk/tcp-framework').Server;
const server = new Server({ port: 8212 });

server.on('data', (socket, {uuid, data}) => {
    switch(data.toString('utf8')) {
        case "echo":
            server.send(socket, {uuid, data});
            break;
        case "delayed_echo":
            setTimeout(() => {
                server.send(socket, {uuid, data});
            }, 3000);
            break;
        default:
            break;
    }
});

server.start();

//client.js
const Client = require('@qtk/tcp-framework').Client;
const uuid = require('uuid').v1;
const port = 8212;

client.on('data', ({uuid, data}) => {
    console.log(`got response, uuid: ${uuid}, data: ${data.toString('utf8')}`);
});

client.send({ uuid: uuid(), data: Buffer.from('echo') });

备注

  • 3.0版本与之前的版本协议不兼容,请勿混合使用
  • 3.0版本比2.0版性能提升13%