Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 | 1x 1x 39x 39x 39x 39x 39x 39x 39x 39x 39x 39x 327x 40x 40x 40x 40x 39x 39x 39x 39x 39x 40x 110x 110x 110x 40x 40x 40x 40x 40x 40x 1x 1x 40x 39x 39x 39x 1x 1x 1x 1x 1x 1x 1x 1x 39x 39x 39x 39x 39x 39x 1x 1x 1x 14x 14x 14x 14x 14x 11x 11x 11x 14x 14x 3x 3x 14x 14x 14x 14x 14x 3x 3x 3x 3x 3x 3x 3x 3x 3x 1x 56x 56x 56x 17x 17x 17x 17x 17x 17x 17x 14x 110x 110x 110x 110x 17x 17x 17x 110x 3x 3x 3x 150x 150x 12x 12x 2x 1x 1x | /**
* A2A Client - Agent-to-Agent Communication Client
*
* WebSocket client for connecting to A2A Server
* Supports:
* - Agent registration
* - RPC calls (request/response)
* - Publish/Subscribe
* - Capability discovery
*
* @version 0.1.0
* @author 小蒲萄 (Clawd)
*/
const WebSocket = require('ws');
const { v4: uuidv4 } = require('uuid');
class A2AClient {
constructor(serverUrl, options = {}) {
this.options = {
// Agent 配置
agentId: options.agentId || `agent-${uuidv4().substr(0, 8)}`,
capabilities: options.capabilities || [],
metadata: options.metadata || {},
// 重连配置
maxReconnectAttempts: options.maxReconnectAttempts || 10,
reconnectDelay: options.reconnectDelay || 1000,
// 超时配置
callTimeout: options.callTimeout || 30000,
// 日志
verbose: options.verbose || false,
};
this.serverUrl = serverUrl;
this.ws = null;
this.connected = false;
this.registered = false;
// 响应处理器
this.responseHandlers = new Map();
// 订阅处理器
this.messageHandlers = new Map();
// 事件监听器
this.eventListeners = new Map();
// 重连计数
this.reconnectAttempts = 0;
this.log(`🦞 A2A Client 初始化：${this.options.agentId}`);
}
log(...args) {
Iif (this.options.verbose) {
console.log(`[A2A:${this.options.agentId}]`, ...args);
}
}
/**
* 连接到服务器
*/
connect() {
return new Promise((resolve, reject) => {
try {
this.ws = new WebSocket(this.serverUrl);
this.ws.on('open', () => {
this.log('✅ 已连接');
this.connected = true;
this.reconnectAttempts = 0;
// 自动注册
this.register();
resolve();
});
this.ws.on('message', (data) => {
try {
const message = JSON.parse(data.toString());
this.handleMessage(message);
} catch (error) {
this.log('❌ 消息解析错误:', error.message);
}
});
this.ws.on('close', () => {
this.log('🔌 连接关闭');
this.connected = false;
this.registered = false;
// 自动重连
this.reconnect();
});
this.ws.on('error', (error) => {
this.log('❌ 连接错误:', error.message);
reject(error);
});
} catch (error) {
reject(error);
}
});
}
/**
* 断开连接
*/
disconnect() {
return new Promise((resolve) => {
if (this.ws) {
this.ws.close(1000, 'Client disconnecting');
}
this.ws = null;
this.connected = false;
this.registered = false;
this.log('🛑 已断开');
resolve();
});
}
/**
* 重连
*/
async reconnect() {
if (this.reconnectAttempts >= this.options.maxReconnectAttempts) {
this.log(`❌ 重连失败：已达到最大尝试次数 (${this.reconnectAttempts})`);
this.emit('max-reconnect-reached');
return;
}
this.reconnectAttempts++;
const delay = this.options.reconnectDelay * this.reconnectAttempts;
this.log(`🔄 重连中... (${this.reconnectAttempts}/${this.options.maxReconnectAttempts}) ${delay}ms 后`);
this.emit('reconnecting', { attempt: this.reconnectAttempts, delay });
await new Promise(resolve => setTimeout(resolve, delay));
try {
await this.connect();
this.log('✅ 重连成功');
this.emit('reconnected');
} catch (error) {
this.log('❌ 重连失败:', error.message);
}
}
/**
* 注册 Agent
*/
register() {
return new Promise((resolve, reject) => {
Iif (!this.connected) {
reject(new Error('Not connected'));
return;
}
const handler = (message) => {
if (message.type === 'registered' && message.agentId === this.options.agentId) {
this.unregisterHandler('register-response', handler);
this.registered = true;
this.log(`✅ Agent 注册成功：${this.options.agentId}`);
this.emit('registered', { agentId: this.options.agentId });
resolve(message);
} else if (message.type === 'error') {
this.unregisterHandler('register-response', handler);
reject(new Error(message.error));
}
};
this.registerHandler('register-response', handler);
this.ws.send(JSON.stringify({
type: 'register',
agentId: this.options.agentId,
capabilities: this.options.capabilities,
metadata: this.options.metadata,
}));
this.log(`📝 注册 Agent: ${this.options.agentId}`);
});
}
/**
* 注销 Agent
*/
unregister() {
return new Promise((resolve) => {
if (!this.registered) {
resolve();
return;
}
this.ws.send(JSON.stringify({
type: 'unregister',
agentId: this.options.agentId,
}));
this.registered = false;
this.log(`🗑️ Agent 注销：${this.options.agentId}`);
resolve();
});
}
/**
* 发送原始消息
*/
send(message) {
Iif (!this.ws || !this.connected) {
throw new Error('Not connected');
}
this.ws.send(JSON.stringify(message));
this.log('📤 发送消息:', message.type);
}
/**
* RPC 调用
*/
call(targetAgentId, payload, options = {}) {
return new Promise((resolve, reject) => {
const correlationId = options.correlationId || uuidv4();
const timeout = options.timeout || this.options.callTimeout;
const handler = (message) => {
if (message.type === 'response' && message.correlationId === correlationId) {
this.unregisterHandler(correlationId, handler);
Iif (message.error) {
reject(new Error(message.error));
} else {
resolve(message.payload);
}
}
};
this.registerHandler(correlationId, handler);
// 设置超时
const timeoutId = setTimeout(() => {
this.unregisterHandler(correlationId, handler);
reject(new Error(`Call timeout (${timeout}ms)`));
}, timeout);
// 清理超时时移除 handler
const originalHandler = handler;
handler.__timeoutId = timeoutId;
handler.__originalHandler = originalHandler;
this.ws.send(JSON.stringify({
type: 'call',
from: this.options.agentId,
to: targetAgentId,
correlationId,
payload,
timestamp: new Date().toISOString()
}));
this.log(`📤 调用 ${targetAgentId}: ${correlationId}`);
});
}
/**
* 发布消息
*/
publish(channel, payload) {
return new Promise((resolve, reject) => {
const handler = (message) => {
if (message.type === 'published' && message.channel === channel) {
this.unregisterHandler(`publish-${channel}`, handler);
resolve(message);
} else if (message.type === 'error') {
this.unregisterHandler(`publish-${channel}`, handler);
reject(new Error(message.error));
}
};
this.registerHandler(`publish-${channel}`, handler);
this.ws.send(JSON.stringify({
type: 'publish',
channel,
from: this.options.agentId,
payload,
timestamp: new Date().toISOString()
}));
this.log(`📢 发布到 ${channel}`);
});
}
/**
* 订阅频道
*/
subscribe(channel) {
return new Promise((resolve, reject) => {
const handler = (message) => {
if (message.type === 'subscribed' && message.channel === channel) {
this.unregisterHandler(`subscribe-${channel}`, handler);
this.log(`📌 已订阅 ${channel}`);
resolve(message);
} else if (message.type === 'error') {
this.unregisterHandler(`subscribe-${channel}`, handler);
reject(new Error(message.error));
}
};
this.registerHandler(`subscribe-${channel}`, handler);
this.ws.send(JSON.stringify({
type: 'subscribe',
agentId: this.options.agentId,
channel,
timestamp: new Date().toISOString()
}));
});
}
/**
* 取消订阅
*/
unsubscribe(channel) {
this.log(`🔓 取消订阅 ${channel}`);
// 服务端暂不支持显式取消，客户端移除 handler 即可
this.messageHandlers.delete(channel);
}
/**
* 能力发现
*/
discover(options = {}) {
return new Promise((resolve, reject) => {
const correlationId = uuidv4();
const handler = (message) => {
if (message.type === 'discovery-result' && message.correlationId === correlationId) {
this.unregisterHandler(correlationId, handler);
resolve(message.results);
} else Eif (message.type === 'error') {
this.unregisterHandler(correlationId, handler);
reject(new Error(message.error));
}
};
this.registerHandler(correlationId, handler);
this.ws.send(JSON.stringify({
type: 'discover',
correlationId,
capability: options.capability,
filter: options.filter,
timestamp: new Date().toISOString()
}));
this.log(`🔍 能力发现：${options.capability || 'all'}`);
});
}
/**
* 发送心跳
*/
heartbeat() {
Iif (this.connected && this.registered) {
this.ws.send(JSON.stringify({
type: 'heartbeat',
agentId: this.options.agentId,
timestamp: new Date().toISOString()
}));
}
}
/**
* 注册消息处理器
*/
registerHandler(key, handler) {
Eif (!this.responseHandlers.has(key)) {
this.responseHandlers.set(key, []);
}
this.responseHandlers.get(key).push(handler);
}
/**
* 注销消息处理器
*/
unregisterHandler(key, handler) {
const handlers = this.responseHandlers.get(key);
Iif (!handlers) {
return;
}
if (handler) {
const index = handlers.indexOf(handler);
Eif (index > -1) {
handlers.splice(index, 1);
// 清理超时
if (handler.__timeoutId) {
clearTimeout(handler.__timeoutId);
}
}
} else E{
// 移除所有 handler
handlers.forEach(h => {
if (h.__timeoutId) {
clearTimeout(h.__timeoutId);
}
});
this.responseHandlers.delete(key);
}
}
/**
* 处理消息
*/
handleMessage(message) {
this.log(`📨 收到消息:`, message.type);
// 触发事件监听器
this.emit(message.type, message);
// 调用响应处理器
const handlers = this.responseHandlers.get(message.correlationId) ||
this.responseHandlers.get(message.type) ||
this.responseHandlers.get(message.channel);
if (handlers) {
for (const handler of handlers) {
try {
handler(message);
} catch (error) {
this.log('❌ Handler 错误:', error.message);
}
}
}
// 特殊处理：频道消息
Iif (message.type === 'message' && message.channel) {
const channelHandlers = this.messageHandlers.get(message.channel);
if (channelHandlers) {
for (const handler of channelHandlers) {
try {
handler(message.payload, message.from);
} catch (error) {
this.log('❌ Channel handler 错误:', error.message);
}
}
}
}
}
/**
* 事件监听
*/
on(event, listener) {
Eif (!this.eventListeners.has(event)) {
this.eventListeners.set(event, []);
}
this.eventListeners.get(event).push(listener);
}
/**
* 移除事件监听
*/
off(event, listener) {
const listeners = this.eventListeners.get(event);
if (!listeners) {
return;
}
if (listener) {
const index = listeners.indexOf(listener);
if (index > -1) {
listeners.splice(index, 1);
}
} else {
this.eventListeners.delete(event);
}
}
/**
* 一次性事件监听（once）
*/
once(event, listener) {
const wrapper = (data) => {
listener(data);
this.off(event, wrapper);
};
this.on(event, wrapper);
}
/**
* 触发事件
*/
emit(event, data) {
const listeners = this.eventListeners.get(event) || [];
for (const listener of listeners) {
try {
listener(data);
} catch (error) {
this.log('❌ Event listener 错误:', error.message);
}
}
}
/**
* 获取状态
*/
getStatus() {
return {
connected: this.connected,
registered: this.registered,
serverUrl: this.serverUrl,
agentId: this.options.agentId,
reconnectAttempts: this.reconnectAttempts,
};
}
}
// 命令行测试
Iif (require.main === module) {
const client = new A2AClient('ws://localhost:8080', {
agentId: 'test-agent',
capabilities: ['test', 'echo'],
verbose: true,
});
client.connect()
.then(() => {
console.log('✅ 连接成功');
// 测试调用
return client.call('another-agent', { test: 'data' });
})
.then(result => {
console.log('✅ 调用成功:', result);
return client.disconnect();
})
.catch(console.error);
}
// 导出
module.exports = { A2AClient };
|