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holly-websocket

v0.1.0

Published

holly-websocket SDK

Downloads

15

Readme

Holly WebSocket

开箱即用的 WebSocket 客户端 SDK,支持心跳检测和自动断线重连。

特性

  • TypeScript 支持 - 完整的类型定义,提供优秀的开发体验
  • 心跳检测 - 自动发送心跳消息,保持连接活跃
  • 自动重连 - 连接断开时自动尝试重连,可配置重连策略
  • 事件驱动 - 基于事件的 API 设计,易于使用
  • 灵活配置 - 丰富的配置选项,满足各种使用场景
  • 零依赖 - 基于浏览器原生 WebSocket API,无需额外依赖
  • 开箱即用 - 提供合理的默认配置,快速上手

安装

npm install holly-websocket

快速开始

import { WebSocketClient, WebSocketEventType } from 'holly-websocket';

// 创建客户端实例
const client = new WebSocketClient({
  url: 'wss://your-websocket-server.com',
});

// 监听连接成功事件
client.on(WebSocketEventType.OPEN, () => {
  console.log('WebSocket 连接已建立');

  // 发送消息
  client.send('Hello Server!');

  // 发送 JSON 数据
  client.sendJSON({ type: 'greeting', message: 'Hello!' });
});

// 监听消息事件
client.on(WebSocketEventType.MESSAGE, (data) => {
  console.log('收到消息:', data.data);
});

// 监听连接关闭事件
client.on(WebSocketEventType.CLOSE, (data) => {
  console.log('连接已关闭:', data);
});

// 监听错误事件
client.on(WebSocketEventType.ERROR, (error) => {
  console.error('发生错误:', error);
});

// 建立连接
client.connect();

// 断开连接
// client.disconnect();

API 文档

WebSocketClient

构造函数

new WebSocketClient(options: WebSocketClientOptions)

配置选项 (WebSocketClientOptions)

| 参数 | 类型 | 默认值 | 说明 | |------|------|--------|------| | url | string | - | 必填,WebSocket 服务器地址 | | protocols | string \| string[] | - | WebSocket 子协议 | | reconnect | boolean | true | 是否启用自动重连 | | reconnectAttempts | number | 5 | 最大重连次数,-1 表示无限重连 | | reconnectInterval | number | 5000 | 重连间隔时间(毫秒) | | heartbeat | boolean | true | 是否启用心跳检测 | | heartbeatInterval | number | 30000 | 心跳间隔时间(毫秒) | | heartbeatTimeout | number | 5000 | 心跳超时时间(毫秒) | | heartbeatMessage | string \| object | 'ping' | 心跳消息内容 | | isHeartbeatResponse | (data: any) => boolean | - | 判断是否为心跳响应的函数 | | connectTimeout | number | 10000 | 连接超时时间(毫秒) | | immediateHeartbeat | boolean | false | 连接建立后是否立即发送心跳 | | debug | boolean | false | 是否开启调试模式 |

方法

connect()

建立 WebSocket 连接。

client.connect(): void
disconnect()

断开 WebSocket 连接。

client.disconnect(): void
send()

发送消息。

client.send(data: string | ArrayBufferLike | Blob | ArrayBufferView): boolean
sendJSON()

发送 JSON 格式的消息。

client.sendJSON(data: any): boolean
on()

注册事件监听器。

client.on<T>(event: WebSocketEventType, handler: WebSocketEventHandler<T>): void
off()

移除事件监听器。

client.off<T>(event: WebSocketEventType, handler: WebSocketEventHandler<T>): void
offAll()

移除所有事件监听器。

client.offAll(event?: WebSocketEventType): void
getStatus()

获取当前连接状态。

client.getStatus(): WebSocketStatus
isConnected()

判断是否已连接。

client.isConnected(): boolean
destroy()

销毁客户端实例。

client.destroy(): void

事件类型 (WebSocketEventType)

| 事件 | 数据类型 | 说明 | |------|---------|------| | OPEN | Event | 连接成功 | | CLOSE | WebSocketCloseData | 连接关闭 | | ERROR | WebSocketErrorData | 连接错误 | | MESSAGE | WebSocketMessageData | 接收到消息 | | RECONNECTING | ReconnectData | 正在重连 | | RECONNECTED | Event | 重连成功 | | RECONNECT_FAILED | ReconnectData | 重连失败 | | HEARTBEAT_TIMEOUT | null | 心跳超时 |

连接状态 (WebSocketStatus)

  • CONNECTING - 连接中
  • CONNECTED - 已连接
  • DISCONNECTING - 断开连接中
  • DISCONNECTED - 已断开
  • RECONNECTING - 重连中

使用示例

基础使用

import { WebSocketClient, WebSocketEventType } from 'holly-websocket';

const client = new WebSocketClient({
  url: 'wss://echo.websocket.org',
  debug: true, // 开启调试模式
});

client.on(WebSocketEventType.OPEN, () => {
  console.log('连接成功');
  client.send('Hello!');
});

client.on(WebSocketEventType.MESSAGE, ({ data }) => {
  console.log('收到消息:', data);
});

client.connect();

自定义心跳

const client = new WebSocketClient({
  url: 'wss://your-server.com',
  heartbeat: true,
  heartbeatInterval: 20000, // 20秒发送一次心跳
  heartbeatTimeout: 3000,   // 3秒未收到响应视为超时
  heartbeatMessage: { type: 'ping' }, // 自定义心跳消息
  isHeartbeatResponse: (data) => {
    // 自定义心跳响应判断逻辑
    return data?.type === 'pong';
  },
});

client.on(WebSocketEventType.HEARTBEAT_TIMEOUT, () => {
  console.log('心跳超时,连接可能已断开');
});

client.connect();

自定义重连策略

const client = new WebSocketClient({
  url: 'wss://your-server.com',
  reconnect: true,
  reconnectAttempts: 10,    // 最多重连10次
  reconnectInterval: 3000,  // 每次重连间隔3秒
});

client.on(WebSocketEventType.RECONNECTING, ({ attempt, maxAttempts }) => {
  console.log(`正在尝试重连... (${attempt}/${maxAttempts})`);
});

client.on(WebSocketEventType.RECONNECT_FAILED, ({ attempt }) => {
  console.log(`重连失败,已尝试 ${attempt} 次`);
});

client.connect();

无限重连

const client = new WebSocketClient({
  url: 'wss://your-server.com',
  reconnect: true,
  reconnectAttempts: -1,  // -1 表示无限重连
  reconnectInterval: 5000,
});

client.connect();

发送不同类型的消息

// 发送文本消息
client.send('Hello World');

// 发送 JSON 消息
client.sendJSON({
  type: 'chat',
  message: 'Hello',
  timestamp: Date.now(),
});

// 发送二进制数据
const buffer = new ArrayBuffer(8);
client.send(buffer);

// 发送 Blob
const blob = new Blob(['Hello'], { type: 'text/plain' });
client.send(blob);

完整示例:聊天应用

import { WebSocketClient, WebSocketEventType } from 'holly-websocket';

class ChatClient {
  private ws: WebSocketClient;

  constructor(url: string, username: string) {
    this.ws = new WebSocketClient({
      url,
      reconnect: true,
      reconnectAttempts: -1,
      heartbeat: true,
      heartbeatInterval: 30000,
      debug: true,
    });

    this.setupEventHandlers();
  }

  private setupEventHandlers() {
    this.ws.on(WebSocketEventType.OPEN, () => {
      console.log('聊天室已连接');
      this.sendMessage('加入了聊天室', 'system');
    });

    this.ws.on(WebSocketEventType.MESSAGE, ({ data }) => {
      if (data.type === 'chat') {
        this.onMessageReceived(data);
      }
    });

    this.ws.on(WebSocketEventType.RECONNECTING, ({ attempt }) => {
      console.log(`连接断开,正在重连... (第 ${attempt} 次)`);
    });

    this.ws.on(WebSocketEventType.ERROR, (error) => {
      console.error('连接错误:', error);
    });
  }

  connect() {
    this.ws.connect();
  }

  sendMessage(message: string, type: string = 'chat') {
    this.ws.sendJSON({
      type,
      message,
      timestamp: Date.now(),
    });
  }

  private onMessageReceived(data: any) {
    console.log(`[${new Date(data.timestamp).toLocaleTimeString()}] ${data.message}`);
  }

  disconnect() {
    this.ws.disconnect();
  }
}

// 使用
const chat = new ChatClient('wss://your-chat-server.com', 'Alice');
chat.connect();
chat.sendMessage('大家好!');

TypeScript 支持

本 SDK 使用 TypeScript 编写,提供完整的类型定义。

import {
  WebSocketClient,
  WebSocketEventType,
  WebSocketStatus,
  WebSocketClientOptions,
  WebSocketMessageData,
  WebSocketErrorData,
  WebSocketCloseData,
  ReconnectData,
} from 'holly-websocket';

浏览器兼容性

本 SDK 基于浏览器原生 WebSocket API,支持所有现代浏览器:

  • Chrome 16+
  • Firefox 11+
  • Safari 7+
  • Edge 12+
  • Opera 12.1+

在线示例

React + Webpack Demo

完整的 React 应用示例,展示如何在实际项目中使用本 SDK。

快速开始:

# 1. 启动 WebSocket 服务器
node examples/index.js

# 2. 在另一个终端启动 React 应用
cd example/react-demo
npm install
npm run dev

访问 http://localhost:3000 查看示例。

功能演示:

  • WebSocket 连接管理
  • 消息收发(文本、JSON)
  • 自动重连机制
  • 心跳检测
  • 事件日志
  • 统计信息

更多示例请查看 example 目录。

License

MIT

贡献

欢迎提交 Issue 和 Pull Request!