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mp-websocket-polyfill

v0.3.0

Published

Let WebSocket in WeChat miniprogram to adapt browser's lib.

Downloads

9

Readme

mp-websocket-polyfill

适用于微信小程序的垫片,使小程序的 SocketTask 兼容浏览器端的 WebSocket,这样便可以使用 Stomp.js 等库。

安装

yarn add mp-websocket-polyfill

# 小程序真机调试,可能会因找不到 TextEncoder、TextDecoder 而报错
# 所以,推荐安装垫片:
yarn add fastestsmallesttextencoderdecoder

使用方式

解决真机 TextEncoderTextDecoder 找不到问题

安装依赖:

yarn add fastestsmallesttextencoderdecoder

然后在入口处:

import 'fastestsmallesttextencoderdecoder'

直接使用

原来:

const socketTask = wx.connectSocket({
  url: 'localhost:8080/ws',
  // ...其他参数
})

替换为:

import Ws from 'mp-websocket-polyfill'

const webSocket = new Ws({
  url: 'localhost:8080/ws',
  // ...其他参数,和 wx.connectSocket 保持一致
})

然后这个 webSocket 对象便可以在只支持浏览器端 WebSocket 的地方使用了。

配合 Stomp.js 使用

import { Client } from '@stomp/stompjs'
import Ws from 'mp-websocket-polyfill'

const client = new Client({
  // ↓ 请使用 webSocketFactory 修改默认的 websocket 构造器
  webSocketFactory() {
    return new Ws({
      url: 'ws://localhost:8080/gs-guide-websocket',
      protocols: ['v12.stomp', 'v11.stomp', 'v10.stomp'], // ← 这是 stomp 协议的默认写法,可供参考
    })
  },
})

client.activate()

注意事项

注意事项:

  • 使用垫片构造的实例,原先小程序自带的 API 例如 onOpenonClose 均被屏蔽无法使用,但是可以通过新实例 .socketTask 属性获取小程序原生的 SocketTask 对象;
  • 如果使用 Stomp,建议参考上面的示例,有时 protocols 也要配置正确。

API

  • new Ws(options):兼容微信小程序的 wx.connectSocket() 的参数,提供额外的配置字段:
    • fixIOSWechat0x00Issue:默认为 trueboolean 类型),是否修复 iOS 微信接收到 Stomp 消息时可能因遗漏末尾 0x00 字符而导致解析失败的问题;
  • ws.socketTask:通过实例的这个属性,可以获取原生的小程序 socketTask 对象。