项目背景
技术栈
前端层：Vue 3 + WebSocket ↓ 服务端：Python + aiohttp + uv ↓ 通道层：Node.js + ws + OpenClaw Plugin SDK ↓ AI 层：OpenClaw Gateway + LLM Provider
快速开始
项目结构
openclaw-websocket-channel/
├── websocket-service/ # Python WebSocket 服务端
│ ├── app.py # aiohttp 主程序
│ └── requirements.txt # Python 依赖
├── websocket-web/ # Vue 3 前端
│ ├── src/
│ │ └── App.vue # 主界面
│ └── package.json
└── websocket-channel/ # OpenClaw 通道插件
├── index.ts # 插件主逻辑
└── openclaw.plugin.json
1. 启动 Python WebSocket 服务端
# 进入服务端目录
cd websocket-service
# 使用 uv 安装依赖
uv sync
# 启动服务端
python app.py
# 默认监听：ws://localhost:8765
2. 启动 Vue 前端
# 进入前端目录
cd websocket-web
# 安装依赖
npm install
# 开发模式运行
npm run dev
# 访问：http://localhost:3000
前端界面功能：
- 实时聊天窗口
- 连接状态显示
- 消息收发日志
3. 安装 WebSocket Channel
# 进入通道插件目录
cd websocket-channel
# 安装到 OpenClaw
openclaw plugins install .
# 验证安装
openclaw plugins list
# 应该看到：websocket-channel
4. 配置 OpenClaw
编辑 ~/.openclaw/config.json（或通过 Web UI）：
{"channels":{"websocket-channel":{"enabled":true,"config":{"enabled":true,"wsUrl":"ws://localhost:8765/openclaw"}}}}
配置说明：
enabled: 启用通道wsUrl: WebSocket 服务端地址- 无需
groupPolicy：默认就是开放模式
5. 重启 OpenClaw Gateway
# 如果使用 macOS 应用
# 点击菜单栏 OpenClaw → Restart Gateway
# 或命令行重启
pkill -f openclaw-gateway openclaw gateway run
6. 测试
- 打开浏览器访问前端：
http://localhost:3000 - 点击'连接'按钮
- 发送消息：'你好，请介绍一下自己'
- 等待 AI 回复…
预期效果：
你：你好，请介绍一下自己
AI：你好！我是你的个人 AI 助手，基于 OpenClaw 框架运行。
我可以帮助你回答问题、编写代码、分析数据等。
有什么我可以帮你的吗？😊
程序架构
整体架构图
┌─────────────────┐
│ 用户浏览器 │
│ (Vue 前端) │
└────────┬────────┘
│ WebSocket │
│ ws://localhost:8765 ▼
┌─────────────────┐
│ Python 服务端 │
│ (aiohttp) │
└────────┬────────┘
│ WebSocket │ 长连接 ▼
┌─────────────────┐
│ Node.js 通道 │
│ (ws 库) │
└────────┬────────┘
│ OpenClaw Plugin API ▼
┌─────────────────┐
│ OpenClaw │
│ Gateway │
└────────┬────────┘
│ ▼
┌─────────────────┐
│ AI Provider │
│ (Qwen/Bailian) │
└─────────────────┘
数据流详解
入站消息（前端 → AI）
1. 用户在 Vue 界面输入消息 ↓
2. 前端通过 WebSocket 发送到 Python 服务端 ↓
3. Python 服务端转发给 Node.js 通道 ↓
4. Node.js 通道的 ws.on("message") 接收 ↓
5. 标准化消息格式 ↓
6. 调用 OpenClaw 框架 API ↓
7. Gateway 调用 AI Provider 生成回复
出站消息（AI → 前端）
1. AI 生成回复文本 ↓
2. OpenClaw 调用 deliver 回调 ↓
3. Node.js 通道通过 WebSocket 发送给 Python 服务端 ↓
4. Python 服务端转发给 Vue 前端 ↓
5. 前端界面显示 AI 回复
Channel 开发详解
1. 项目初始化
# 创建插件目录
mkdir -p openclaw-websocket-channel/websocket-channel
cd openclaw-websocket-channel/websocket-channel
# 创建基础文件
touch index.ts openclaw.plugin.json package.json
2. 定义插件元数据
index.ts:
import type { ReplyPayload } from "openclaw/auto-reply/types";
import type { ChannelPlugin, OpenClawConfig } from "openclaw/plugin-sdk";
import { createDefaultChannelRuntimeState } from "openclaw/plugin-sdk";
interface WebSocketChannelConnection {
ws: any;
accountId: string;
}
interface WebSocketChannelAccount {
accountId: string;
wsUrl: string;
enabled?: boolean;
configured?: boolean;
dmPolicy?: "pairing" | "allowlist" | "open" | "disabled";
}
const connections = new Map<string, WebSocketChannelConnection>();
let pluginRuntime: any = null;
const WebSocketChannel: ChannelPlugin<WebSocketChannelAccount> = {
id: "websocket-channel",
meta: {
id: "websocket-channel",
label: "Websocket Channel",
selectionLabel: "Websocket Channel (Custom)",
docsPath: "/channels/websocket-channel",
blurb: "WebSocket based messaging channel.",
aliases: ["ws"],
},
// ... 其他配置
};
3. 实现配置适配器
config: {
/**
* 列出所有配置的账户 ID
* @returns 固定返回 ["default"]
*/
listAccountIds: (cfg: OpenClawConfig) => {
return ["default"];
},
/**
* 解析账户配置
*/
resolveAccount: (cfg: OpenClawConfig, accountId: string) => {
const channelCfg = cfg.channels?.["websocket-channel"];
if (!channelCfg || !channelCfg.config) {
return undefined;
}
const config = channelCfg.config as any;
return {
accountId: "default",
wsUrl: config.wsUrl || "ws://localhost:8765/openclaw",
enabled: config.enabled !== false,
};
},
/**
* 检查账户是否已配置
*/
isConfigured: async (account, cfg) => {
return Boolean(account.wsUrl && account.wsUrl.trim() !== "");
},
}
4. 实现状态管理适配器 ⭐关键
status: {
/**
* 默认运行时状态模板
* ⚠️ 必须实现这个方法，否则 UI 会显示 "0/1 connected"
*/
defaultRuntime: createDefaultChannelRuntimeState("default", {
wsUrl: null,
connected: false,
groupPolicy: null,
}),
/**
* 构建通道摘要（用于 UI 显示）
*/
buildChannelSummary: ({ snapshot }) => ({
wsUrl: snapshot.wsUrl ?? null,
connected: snapshot.connected ?? null,
groupPolicy: snapshot.groupPolicy ?? null,
}),
/**
* 构建账户完整快照
*/
buildAccountSnapshot: ({ account, runtime }) => ({
accountId: account.accountId,
enabled: account.enabled,
configured: account.configured,
wsUrl: account.wsUrl,
running: runtime?.running ?? false,
connected: runtime?.connected ?? false,
groupPolicy: runtime?.groupPolicy ?? null,
lastStartAt: runtime?.lastStartAt ?? null,
lastStopAt: runtime?.lastStopAt ?? null,
lastError: runtime?.lastError ?? null,
}),
}
为什么需要 defaultRuntime？
OpenClaw 的 UI 通过读取通道的 defaultRuntime 来知道要跟踪哪些状态字段。如果没有这个配置：
- UI 不知道要显示
connected字段 - 即使你在
startAccount中设置了connected: true - UI 也只会显示'0/1 connected'
正确做法：
- 在
defaultRuntime中声明要跟踪的字段（包括connected: false） - 在
startAccount开始时调用ctx.setStatus({ connected: true }) - UI 就会正确显示'1/1 connected'
5. 实现网关适配器（核心）
gateway: {
/**
* 启动 WebSocket 账户连接
*/
startAccount: async (ctx) => {
const { log, account, abortSignal, cfg } = ctx;
log?.info(`[websocket-channel] Starting WebSocket Channel for ${account.accountId}`);
// 获取 runtime API
const runtime = pluginRuntime;
// ⭐ 关键：设置初始状态为已连接
ctx.setStatus({
accountId: account.accountId,
wsUrl: account.wsUrl,
running: true,
connected: true,
});
log?.info(`[websocket-channel] Status set: connected=true, running=true`);
// 创建 WebSocket 连接
const WebSocketLib = await import("ws");
const ws = new (WebSocketLib.default as any)(account.wsUrl);
// 存储连接
connections.set(account.accountId, { ws, accountId: account.accountId });
// 监听消息事件
ws.on("message", async (data: Buffer) => {
try {
// 1. 解析原始消息
const rawData = data.toString();
const eventData = JSON.parse(rawData);
const innerData = eventData.data || {};
// 2. 标准化消息
const normalizedMessage = {
id: `${eventData.source || "websocket"}-${Date.now()}`,
channel: "websocket-channel",
accountId: account.accountId,
senderId: innerData.source || eventData.source || "unknown",
senderName: innerData.source || eventData.source || "Unknown",
text: innerData.content || innerData.text || "",
timestamp: innerData.timestamp || Date.now().toISOString(),
isGroup: false,
groupId: undefined,
attachments: [],
metadata: {},
};
log?.info(`[websocket-channel] 📨 Received: "${normalizedMessage.text}" from ${normalizedMessage.senderId}`,);
// 3. 解析路由
const route = runtime.channel.routing.resolveAgentRoute({
cfg,
channel: "websocket-channel",
accountId: account.accountId,
peer: { kind: "direct", id: normalizedMessage.senderId },
});
// 4. 构建消息上下文
const ctxPayload = runtime.channel.reply.finalizeInboundContext({
Body: normalizedMessage.text,
BodyForAgent: normalizedMessage.text,
From: normalizedMessage.senderId,
To: undefined,
SessionKey: route.sessionKey,
AccountId: route.accountId,
ChatType: "direct",
SenderName: normalizedMessage.senderName,
SenderId: normalizedMessage.senderId,
Provider: "websocket-channel",
Surface: "websocket-channel",
MessageSid: normalizedMessage.id,
Timestamp: Date.now(),
});
// 5. 调用框架调度器
await runtime.channel.reply.dispatchReplyWithBufferedBlockDispatcher({
ctx: ctxPayload,
cfg: cfg,
dispatcherOptions: {
deliver: async (payload: ReplyPayload, { kind }) => {
log?.info(`[websocket-channel] Delivering ${kind} reply via WebSocket...`);
const currentConn = connections.get(account.accountId);
if (!currentConn || !currentConn.ws || currentConn.ws.readyState !== 1) {
throw new Error("No WebSocket connection available");
}
// 发送 AI 回复
currentConn.ws.send(JSON.stringify({ type: "reply", content: payload.text || "", kind }));
},
onError: (err, { kind }) => {
log?.error(`[websocket-channel] Delivery error for ${kind}: ${err.message}`);
},
},
});
log?.info(`[websocket-channel] Message dispatched successfully`);
} catch (err) {
log?.error(`[websocket-channel] Failed to process message: ${err.message}`);
}
});
// 监听错误和关闭
ws.on("error", (err: Error) => {
log?.error(`[websocket-channel] ❌ WebSocket error: ${err.message}`);
connections.delete(account.accountId);
reject(err);
});
ws.on("close", () => {
log?.info(`[websocket-channel] 🔴 Connection closed`);
connections.delete(account.accountId);
resolve();
});
// 监听中止信号
abortSignal.addEventListener("abort", () => {
log?.info(`[websocket-channel] ⏹️ Abort requested`);
ws.close();
resolve();
});
// 保持连接运行
await Promise.race([
connectionPromise,
new Promise<void>((resolve) => {
abortSignal.addEventListener("abort", () => resolve());
}),
]);
connections.delete(account.accountId);
},
}
6. 注册插件入口
/**
* 注册插件入口
* @param api - 插件 API
*/
export default function register(api: any) {
console.log("[websocket-channel] Registering WebSocket Channel plugin");
pluginRuntime = api.runtime;
api.registerChannel({ plugin: WebSocketChannel });
}
