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miniprogram-websocket

v1.1.0

Published

A WebSocket API polyfill for mini programs.

Downloads

902

Readme

miniprogram-websocket

标准 WebSocket API 的小程序 polyfill,提供与 Web 浏览器一致的接口实现。

English

小程序支持

| 微信 | 支付宝 | 百度 | 字节跳动 | QQ | 快手 | 京东 | 小红书 | | :---: | :----: | :---: | :------: | :---: | :---: | :---: | :----: | | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |

在 Chrome、Firefox、Edge、Safari 等浏览器环境中,导出的模块将直接返回浏览器原生实现,无额外性能开销。

安装

npm install miniprogram-websocket

快速开始

import { WebSocket, Blob } from "miniprogram-websocket";

// 创建 WebSocket 连接
const socket = new WebSocket("wss://websocket.example.com");

// 设置 binaryType 为 "arraybuffer"(默认为 "blob")
socket.binaryType = "arraybuffer";

// 监听连接建立
socket.addEventListener("open", () => {
    console.log("连接已建立");

    // 发送文本
    socket.send("Hello Server!");

    // 发送 Blob
    const blob = new Blob(["Hello via Blob"]);
    socket.send(blob);
});

// 监听消息
socket.addEventListener("message", (event) => {
    if (event.data instanceof ArrayBuffer) {
        // 二进制数据
        const view = new DataView(event.data);
        console.log(view.getInt32(0));
    } else if (event.data instanceof Blob) {
        // Blob 数据
        event.data.text().then(console.log);
    } else {
        // 文本数据
        console.log(event.data);
    }
});

// 监听连接关闭
socket.addEventListener("close", (event) => {
    console.log(`连接已关闭: code=${event.code}, reason=${event.reason}`);
});

// 监听连接错误
socket.addEventListener("error", () => {
    console.error("连接错误");
});

支付宝小程序开发者注意:支付宝官方将 globalThiswindowdocumentWebSocket 等浏览器内置对象名列为保留字,不应作为导入标识符使用,否则可能导致框架无法正常访问导入内容。如遇导入异常,可通过导入重命名规避,例如 import { WebSocket as myWebSocket } from "miniprogram-websocket";

使用事件属性

除了 addEventListener,也可以使用 on-event 属性注册事件处理函数:

socket.onopen = () => socket.send("Hello!");
socket.onmessage = (event) => console.log(event.data);
socket.onclose = (event) => console.log(event.code);
socket.onerror = (event) => console.error("error");

自定义 connectSocket

若需在未适配的小程序平台中使用,可通过 setConnectSocketFunc 注册平台原生的连接方法:

import { WebSocket, setConnectSocketFunc } from "miniprogram-websocket";

// 传入平台原生的 connectSocket 函数
setConnectSocketFunc(wx.connectSocket);

const socket = new WebSocket("wss://websocket.example.com");

API

WebSocket 构造函数

new WebSocket(url: string, protocols?: string | string[])

| 参数 | 类型 | 说明 | | --------- | -------------------- | -------------------- | | url | string | WebSocket 服务器地址 | | protocols | string \| string[] | 子协议 |

属性

| 属性 | 类型 | 读写 | 说明 | | -------------- | --------------------------- | ----- | -------------------------------------------------- | | binaryType | "blob" | "arraybuffer" | 读/写 | 二进制数据的类型,默认值为 "blob" | | bufferedAmount | number | 只读 | 缓冲队列中待发送的字节数(暂不支持,始终返回 0) | | extensions | string | 只读 | 服务端选择的扩展(暂不支持,始终返回 "") | | protocol | string | 只读 | 服务端选择的子协议 | | readyState | number | 只读 | 连接状态 | | url | string | 只读 | 连接地址 |

readyState 常量:

| 常量 | 值 | 说明 | | ---------------------- | --- | -------- | | WebSocket.CONNECTING | 0 | 正在连接 | | WebSocket.OPEN | 1 | 已连接 | | WebSocket.CLOSING | 2 | 正在关闭 | | WebSocket.CLOSED | 3 | 已关闭 |

方法

| 方法 | 说明 | | --------------------- | ---------------------------------- | | send(data) | 发送数据 | | close() | 关闭连接 | | close(code) | 关闭连接,同时指定状态码 | | close(code, reason) | 关闭连接,同时指定状态码与关闭原因 |

send 参数类型: string | ArrayBufferLike | Blob | ArrayBufferView

send() 通过特征检测(feature detection)判断 Blob 类型,任何符合规范的 Blob 实现均可传入。

事件

| 事件 | 类型 | 说明 | | --------- | -------------- | -------- | | open | Event | 连接建立 | | message | MessageEvent | 收到消息 | | close | CloseEvent | 连接关闭 | | error | Event | 连接错误 |

导出说明

WebSocketBlob 在支持原生实现的运行环境中会直接返回原生对象;以 P 为后缀的 WebSocketPBlobP 则为 polyfill 实现,请按需使用。

注意:WebSocketP 仅适用于小程序环境,浏览器中不可用。

import { WebSocket, WebSocketP, Blob, BlobP } from "miniprogram-websocket";

开源协议

MIT License

Copyright (c) 2026

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.