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network-observer

v0.0.6

Published

network observer

Downloads

22

Readme

介绍

  • 监听当前的网络是否 ok,并在网络变更时派发事件
  • 保障 socket 通信,自动心跳,自动重连,让业务无感知

快速开始

import getObserver from "network-observer";

const networkObserver = getObserver();

// 监听网络变化
networkObserver.on("change", isOnline => {
  console.log(`网络${isOnline ? "已恢复" : "已断开"}`);
});

// 同步获取网络最新状态
networkObserver.isOnline();

// 异步获取网络最新状态 (触发 ping)
networkObserver.getNetworkStatus().then(isOnline => {
  console.log(`网络${isOnline ? "正常" : "已断开"}`);
});

利用 socket 进行通信

import getObserver from "network-observer";

const networkObserver = getObserver({
  socket: "wss://xxx.com"
});

networkObserver.send("hello"); // 利用 socket 发送信息

networkObserver.on("message", data => {
  console.log(`收到信息`, data);
});

socket 配置支持传入回调,来动态生成

const networkObserver = getObserver({
  socket: () => `wss://xxx.com?sid=${sid}&token=${token}`
});

socket 的自我恢复机制

底层实现 socket 的保障,无需业务关心,其原理如下:

自动 ping

每隔特定时间,向服务端发出 ping 消息,一方面保持心跳,避免被后端释放,另一方面在 socket 通道出现问题时能即时发现并恢复

自动重连

当发现 socket 通道 close 时,自动重建,并能够「延续」上一个 socket 绑定的回调,无需业务关心

初始化参数

export interface IProps {
  pingUrl?: string; // 监测网络可用的 url
  checkInterval?: number; // 监测网络的间隔
  socket?: string | ISocketCreator; // 如需创建 socket 则可配置,支持字符串的 socket url,或者函数返回 url
}