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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 | 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 126x 126x 126x 126x 126x 126x 126x 126x 7x 187x 187x 187x 187x 187x 7x 7x 7x 7x 7x 7x 91x 1x 1x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 90x 91x 7x 7x 7x 7x 7x 7x 13x 13x 7x 7x 7x 1x 1x 7x 7x 7x 1x 1x 7x 7x 7x 1787x 1787x 7x 7x 7x 16x 16x 7x 7x 7x 2x 1x 1x 1x 2x 7x 7x 7x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 7x 7x 7x 7x 7x 7x 7x 1745x 1745x 1745x 4x 4x 4x 4x 4x 4x 1745x 1745x 1745x 1745x 1745x 1745x 1745x 563x 563x 563x 563x 1616x 296x 274x 274x 274x 22x 22x 22x 22x 1437x 106x 881x 1745x 7x 7x 7x 7x 7x 7x 48x 47x 47x 48x 21x 21x 21x 21x 21x 1x 1x 1x 20x 21x 4x 4x 4x 20x 48x 48x 7x 7x 7x 20x 16x 16x 16x 16x 20x 7x 7x 7x 5x 5x 5x 7x 7x 7x 8x 8x 8x 4x 4x 2x 8x 7x 7x 7x 7x 90x 90x 2x 1x 1x 1x 1x 1x 1x 89x 89x 89x 2x 89x 89x 90x 7x 7x 1x 1x 1x 7x 7x 150x 150x 150x 150x 150x 150x 150x 150x 150x 2x 2x 150x 150x 150x 150x 150x 1x 1x 1x 150x 150x 150x 150x 150x 150x 1x 1x 1x 148x 148x 148x 150x 148x 110x 148x 148x 148x 148x 150x 7x 7x 556x 556x 556x 556x 7x 7x 7x 7x 7x 7x 287x 287x 287x 287x 287x 3x 3x 3x 2x 2x 2x 2x 3x 287x 1x 1x 1x 286x 286x 286x 287x 2x 2x 2x 287x 283x 287x 7x 7x 283x 283x 6x 6x 6x 6x 283x 110x 110x 110x 283x 108x 108x 108x 283x 8x 8x 8x 283x 1x 1x 1x 1x 1x 1x 1x 283x 44x 44x 44x 283x 5x 5x 5x 5x 1x 283x 7x 7x 110x 110x 110x 80x 80x 80x 110x 110x 110x 110x 110x 110x 7x 7x 108x 107x 107x 107x 107x 108x 77x 77x 77x 107x 108x 99x 1837x 1837x 1837x 108x 8x 8x 8x 8x 108x 33x 33x 33x 33x 33x 33x 33x 33x 108x 83x 108x 7x 7x 8x 8x 3x 3x 2x 2x 2x 2x 2x 3x 1x 1x 3x 3x 5x 8x 2x 2x 2x 2x 2x 3x 8x 7x 7x 44x 44x 44x 44x 44x 44x 44x 44x 44x 44x 44x 44x 44x 44x 44x 7x 7x 52x 52x 52x 52x 52x 15x 15x 52x 37x 37x 1x 37x 36x 36x 37x 52x 52x 52x 52x 7x 7x 80x 80x 80x 80x 58x 58x 58x 80x 22x 22x 22x 80x 1x 80x 8x 8x 21x 13x 13x 22x 22x 22x 80x 7x 7x 7x 7x 86x 86x 86x 86x 86x 7x 7x 88x 88x 88x 88x 88x 88x 88x 65x 65x 65x 88x 7x 7x 88x 88x 88x 88x 88x 2x 2x 2x 2x 2x 2x 2x 88x 88x 30x 30x 88x 88x 18x 1x 1x 18x 18x 18x 88x 5x 5x 5x 5x 5x 5x 5x 88x 1x 1x 1x 64x 64x 64x 64x 64x 64x 64x 63x 63x 64x 88x 7x 7x 30x 30x 30x 30x 30x 30x 30x 30x 30x 30x 30x 30x 7x 7x 46x 46x 7x 7x 90x 90x 29x 29x 29x 29x 61x 61x 61x 61x 61x 61x 90x 61x 61x 61x 90x 7x 7x 90x 90x 90x 90x 90x 61x 61x 61x 61x 90x 90x 1x 1x 1x 1x 90x 90x 90x 90x 90x 90x 90x 7x 7x 7x 7x 1493x 1493x 1x 1x 1x 1x 1492x 1492x 1493x 7x 7x 2506x 2506x 2506x 2506x 2506x 2516x 2516x 2513x 2515x 2515x 2506x 1x 1x 2506x 7x 7x 189x 189x 189x 189x 189x 7x 7x 55x 55x 55x 55x 55x 55x 5x 5x 55x 55x 7x 7x 7x 7x 238x 238x 228x 238x 238x 194x 238x 238x 173x 173x 238x 238x 7x 7x 201x 201x 80x 80x 80x 201x 108x 108x 201x 7x 7x 431x 80x 80x 80x 431x 431x 7x 7x 27x 27x 27x 3x 3x 3x 24x 24x 27x 27x 7x 7x 7x 7x 666x 666x 666x 666x 666x 666x 7x 7x 1093x 1093x 1092x 1092x 1093x 1093x 1093x 1093x 1093x 1092x 1092x 1093x 7x 7x 1093x 666x 666x 666x 666x 666x 427x 1093x 7x 7x 1093x 1093x 1090x 1093x 1073x 1073x 1093x 1x 1x 1093x 7x 7x 913x 913x 260x 260x 260x 260x 913x 7x 7x 180x 180x 180x 180x 180x 7x | // Copyright 2026 优谷雅言 open.shengzhiai.com. Licensed under the Apache License, Version 2.0.
// Streaming evaluation session over WebSocket (DESIGN 2.5): state machine, reconnect with
// REPLAY, DROP or FAIL buffering, application heartbeat, result timeout and listener guarantees.
import { applyPrecheck, AudioPrecheck, PcmStats, precheckPcmStats } from './audio.js';
import { describeError, InvalidParameterException, isRetryable, localError, YuguError, YuguErrors } from './errors.js';
import { callHook, redactUrl } from './logger.js';
import { computeBackoffDelay } from './retry.js';
import { normalizeEvalResult } from './result.js';
import { bytesToBase64, randomBytes, toBytes, toHex, truncate, utf8Decode } from './util.js';
/** Session states. */
export const SessionState = Object.freeze({
IDLE: 'IDLE',
CONNECTING: 'CONNECTING',
CONNECTED: 'CONNECTED',
STARTED: 'STARTED',
ENDING: 'ENDING',
RECONNECTING: 'RECONNECTING',
COMPLETED: 'COMPLETED',
FAILED: 'FAILED',
CANCELLED: 'CANCELLED',
CLOSED: 'CLOSED',
});
/** What happens to audio across a reconnect. */
export const AudioBufferPolicy = Object.freeze({ REPLAY: 'REPLAY', DROP: 'DROP', FAIL: 'FAIL' });
/** Heartbeat modes: "auto" pings only once the server is known to answer pong. */
export const HeartbeatMode = Object.freeze({ AUTO: 'auto', ON: true, OFF: false });
/** Replay buffer limit, same as the server per-session audio limit. */
export const DEFAULT_MAX_REPLAY_BYTES = 10 * 1024 * 1024;
/** Largest audio payload per WebSocket frame: 1 s of 16 kHz PCM16, under the 128 KB frame limit. */
const MAX_AUDIO_FRAME_BYTES = 32000;
/**
* maxAttempts counts consecutive failures and resets after a successful reconnect. A server that
* accepts and then always drops the session would loop forever, so a session makes at most
* TOTAL_RECONNECT_FACTOR times maxAttempts reconnect attempts in total.
*/
const TOTAL_RECONNECT_FACTOR = 3;
/** Close codes that a reconnect cannot fix: protocol error, bad data, policy, message too big. */
const TERMINAL_CLOSE_CODES = new Set([1002, 1003, 1007, 1008, 1009, 1010]);
const S = SessionState;
const TERMINAL = new Set([S.COMPLETED, S.FAILED, S.CANCELLED, S.CLOSED]);
const CLOSE_GRACE_MS = 1000;
const WS_CLOSED = 3;
const NOOP = () => {};
const HANDLER = {
connected: 'onConnected',
started: 'onStarted',
partial: 'onPartial',
reconnecting: 'onReconnecting',
reconnected: 'onReconnected',
warning: 'onWarning',
result: 'onResult',
error: 'onError',
closed: 'onClosed',
};
/** Marker that lets only YuguClient construct sessions. */
export const SESSION_CONTEXT = Symbol('yugu.sessionContext');
let sessionSeq = 0;
function neutralize(ws) {
try {
ws.onopen = NOOP;
ws.onmessage = NOOP;
ws.onclose = NOOP;
ws.onerror = NOOP; // never null: the ws package throws on an unhandled error event
} catch (_) {
/* ignore */
}
}
function safeClose(ws, code, reason) {
try {
if (ws.readyState !== WS_CLOSED) ws.close(code, reason);
} catch (_) {
/* already closed or closing */
}
}
/**
* One streaming evaluation. Created by YuguClient.streamEvaluate or streamEvaluateCompat.
*/
export class YuguStreamSession {
constructor(ctx, spec) {
if (!ctx || ctx[SESSION_CONTEXT] !== true) {
throw new TypeError('YuguStreamSession 只能由 YuguClient.streamEvaluate 或 streamEvaluateCompat 创建');
}
sessionSeq += 1;
this._ctx = ctx;
this._id = `ws-${sessionSeq.toString(36)}-${toHex(randomBytes(3))}`;
this._mode = spec.mode;
this._coreType = spec.coreType;
this._path = spec.path;
this._params = spec.params;
this._listener = spec.listener;
this._opt = spec.options;
this._key = spec.options.idempotencyKey;
this._state = S.IDLE;
this._announced = S.IDLE;
this._queue = [];
this._draining = false;
this._ws = null;
this._gen = 0;
this._finalGen = -1;
this._attempt = 0;
this._totalReconnects = 0;
this._connections = 0;
this._reconnectPhase = false;
this._everConnected = false;
this._everStarted = false;
this._endRequested = false;
this._sentOnConn = 0;
this._pingsSent = 0;
this._pingSentAt = null;
this._hbDisabled = false;
this._replay = [];
this._replayBytes = 0;
this._overflow = false;
this._pending = [];
this._acceptedBytes = 0;
this._droppedBytes = 0;
this._droppedSinceLast = 0;
this._stats = new PcmStats();
this._localWarnings = [];
this._warnedLate = false;
this._timers = { connect: null, heartbeat: null, result: null, reconnect: null, close: null };
this._result = null;
this._error = null;
this._closeCode = null;
this._closeReason = '';
this._closedDone = false;
this._waiters = [];
this._closedWaiters = [];
this._abortHandler = null;
}
/** Session id used in logs and EventListener callbacks. */
get id() {
return this._id;
}
/** Idempotency key sent on the handshake and in the start or parameter frame. */
get idempotencyKey() {
return this._key;
}
/** "native" or "compat". */
get mode() {
return this._mode;
}
/** coreType of the session. */
get coreType() {
return this._coreType;
}
/** Current state: always the state announced by the last onStateChanged. */
getState() {
return this._announced;
}
/** True until the session reached COMPLETED, FAILED, CANCELLED or CLOSED. */
isActive() {
return !TERMINAL.has(this._announced);
}
/** Replace or remove (null) the listener. */
setListener(listener) {
if (listener !== null && (typeof listener !== 'object' || listener === undefined)) {
throw localError(90010, 'listener 必须是对象或 null');
}
this._listener = listener;
}
/** Counters for diagnostics. */
getStats() {
return {
state: this._announced,
reconnectAttempts: this._totalReconnects,
acceptedBytes: this._acceptedBytes,
replayBufferBytes: this._replayBytes,
droppedBytes: this._droppedBytes,
replayOverflow: this._overflow,
heartbeat: this._heartbeatWanted(),
};
}
/**
* Queue or send PCM16 mono audio (640 bytes per 20 ms frame recommended).
* Returns true when the bytes are part of the evaluation, false when they were discarded
* (after end, after the session ended, or while reconnecting with DROP).
*/
sendAudio(chunk, options) {
const input = toBytes(chunk);
if (!input) throw localError(90010, 'sendAudio 需要 ArrayBuffer 或 Uint8Array');
if (TERMINAL.has(this._state) || this._state === S.ENDING || this._endRequested) {
if (!this._warnedLate) {
this._warnedLate = true;
this._ctx.logger.warn('ws', `${this._id} end 或结束之后的音频已丢弃`);
}
return false;
}
if (input.length === 0) return true;
const item = { bytes: input.slice(), base64: !!(options && options.base64) };
const len = item.bytes.length;
this._stats.add(item.bytes);
this._acceptedBytes += len;
const policy = this._opt.audioBufferPolicy;
if (this._state === S.STARTED) {
if (policy === AudioBufferPolicy.REPLAY) this._pushReplay(item);
this._sendAudioFrame(item);
return true;
}
if (this._reconnectPhase) {
if (policy === AudioBufferPolicy.REPLAY) {
this._pushReplay(item);
return true;
}
this._droppedBytes += len;
this._droppedSinceLast += len;
return false;
}
if (policy === AudioBufferPolicy.REPLAY) this._pushReplay(item);
else this._pending.push(item);
return true;
}
/**
* Finish the audio. Runs the precheck on the accumulated audio, then sends {"cmd":"end"} as soon
* as the session is STARTED. Idempotent.
*/
end() {
if (TERMINAL.has(this._state) || this._endRequested) return;
this._endRequested = true;
const mode = this._opt.audioPrecheck;
if (mode !== AudioPrecheck.OFF) {
const pc = precheckPcmStats(this._stats, this._opt.sampleRate);
let warnings;
try {
warnings = applyPrecheck(pc.warnings, mode);
} catch (e) {
this._fail(e);
return;
}
this._localWarnings = warnings;
for (const w of warnings) {
this._ctx.logger.warn('precheck', `${this._id} ${w.code} ${w.message}`);
this._emit('warning', w);
}
}
if (this._state === S.STARTED) this._sendEnd();
}
/** Cancel: no onResult or onError follows, onClosed comes last. Idempotent. */
cancel() {
if (TERMINAL.has(this._state)) return;
this._clearTimers();
this._setState(S.CANCELLED);
this._rejectWaiters(localError(90003, '实时评测会话已取消', { idempotencyKey: this._key }));
this._beginClose(1000, 'cancelled');
}
/** Close: cancels an active session, finishes a terminal one at once. Idempotent. */
close() {
if (!TERMINAL.has(this._state)) {
this.cancel();
return;
}
if (!this._closedDone) this._finalize(this._closeCode != null ? this._closeCode : 1000, this._closeReason || 'closed');
}
/** Promise of the final result; rejects with the session error or RequestCancelledException. */
waitForResult() {
if (this._result) return Promise.resolve(this._result);
if (this._error) return Promise.reject(this._error);
if (this._state === S.CANCELLED || (this._state === S.CLOSED && !this._result)) {
return Promise.reject(localError(90003, '实时评测会话已取消', { idempotencyKey: this._key }));
}
return new Promise((resolve, reject) => this._waiters.push({ resolve, reject }));
}
// ------------------------------------------------------------------ internal: lifecycle
_start() {
const sig = this._opt.signal;
if (sig) {
if (sig.aborted) {
Promise.resolve().then(() => this.cancel());
return;
}
this._abortHandler = () => this.cancel();
sig.addEventListener('abort', this._abortHandler, { once: true });
}
Promise.resolve()
.then(() => {
if (this._state === S.IDLE) return this._connect();
return undefined;
})
.catch((e) => this._internalError(e));
}
_whenClosed() {
if (this._closedDone) return Promise.resolve();
return new Promise((resolve) => this._closedWaiters.push(resolve));
}
async _connect() {
if (TERMINAL.has(this._state)) return;
this._timers.reconnect = null;
this._setState(S.CONNECTING);
const gen = ++this._gen;
this._connections += 1;
this._pingsSent = 0;
this._pingSentAt = null;
this._sentOnConn = 0;
this._timers.connect = setTimeout(() => {
this._timers.connect = null;
this._onTransportFailure(gen, localError(90002, `${this._opt.connectTimeoutMs} ms 内未完成连接与会话开始`));
}, this._opt.connectTimeoutMs);
let url;
try {
url = await this._ctx.buildUrl(this._path, this._key, this._opt.query);
} catch (e) {
if (gen === this._gen && !TERMINAL.has(this._state)) this._fail(e instanceof YuguError ? e : localError(90010, String(e && e.message), { cause: e }));
return;
}
if (gen !== this._gen || TERMINAL.has(this._state)) return;
this._ctx.logger.info('ws', `${this._id} connect ${redactUrl(url)}${this._attempt ? ` reconnect ${this._attempt}` : ''}`);
let ws;
try {
ws = new this._ctx.WebSocket(url);
} catch (e) {
this._onTransportFailure(gen, localError(90001, `WebSocket 创建失败：${redactUrl(e && e.message)}`, { cause: e }));
return;
}
this._ws = ws;
try {
ws.binaryType = 'arraybuffer';
} catch (_) {
/* some implementations make it read-only */
}
ws.onopen = () => this._guard(() => {
if (gen === this._gen) this._ctx.logger.debug('ws', `${this._id} socket open`);
});
ws.onmessage = (ev) => this._guard(() => this._onMessage(gen, ev));
ws.onerror = (ev) => this._guard(() => this._onSocketError(gen, ev));
ws.onclose = (ev) => this._guard(() => this._onSocketClose(gen, ev));
}
_guard(fn) {
try {
fn();
} catch (e) {
this._internalError(e);
}
}
_internalError(e) {
this._ctx.logger.error('ws', `${this._id} internal error`, e);
if (!TERMINAL.has(this._state)) this._fail(localError(90005, `SDK 内部错误：${e && e.message}`, { cause: e }));
}
// ------------------------------------------------------------------ internal: frames
_onMessage(gen, ev) {
if (gen !== this._gen || TERMINAL.has(this._state)) return;
this._pingSentAt = null; // any inbound frame proves the connection is alive
const data = ev ? ev.data : undefined;
let text = null;
if (typeof data === 'string') text = data;
else {
const b = toBytes(data);
if (b) {
try {
text = utf8Decode(b);
} catch (_) {
text = null;
}
}
}
if (text == null) {
this._ctx.logger.debug('ws', `${this._id} binary frame ignored`);
return;
}
let f;
try {
f = JSON.parse(text);
} catch (_) {
this._ctx.logger.warn('ws', `${this._id} non JSON frame ignored: ${truncate(text, 120)}`);
return;
}
if (!f || typeof f !== 'object' || Array.isArray(f)) return;
this._handleFrame(gen, f, text);
}
_handleFrame(gen, f, text) {
const ev = typeof f.event === 'string' ? f.event : null;
if (ev === 'pong') {
this._ctx.setPingSupport('supported');
this._updateHeartbeat();
return;
}
if (ev === 'connected') {
this._onConnectedFrame();
return;
}
if (ev === 'started') {
this._onStartedFrame();
return;
}
if (ev === 'error') {
this._onErrorFrame(f);
return;
}
if (ev === 'blocked' || f.blocked === true) {
this._fail(
new InvalidParameterException(typeof f.message === 'string' && f.message ? f.message : '参考文本未通过内容安全审查', {
rawBody: text,
}),
);
return;
}
if (ev === 'result' || Number(f.eof) === 1) {
this._onResultFrame(f);
return;
}
if (f.eof != null && Number(f.eof) === 0) {
const bytes = f.result && f.result.bytes != null && Number.isFinite(Number(f.result.bytes)) ? Number(f.result.bytes) : null;
this._emit('partial', { bytes, raw: f });
return;
}
this._ctx.logger.debug('ws', `${this._id} frame ignored: ${truncate(text, 120)}`);
}
_onConnectedFrame() {
if (this._state !== S.CONNECTING) return;
this._setState(S.CONNECTED);
if (!this._everConnected) {
this._everConnected = true;
this._emit('connected');
}
const frame = Object.assign({}, this._params);
if (this._mode === 'native') frame.cmd = 'start';
if (this._key) frame.idempotencyKey = this._key;
this._sendJson(frame);
this._updateHeartbeat();
}
_onStartedFrame() {
if (this._state !== S.CONNECTED) return; // duplicate started frames are ignored
this._clearTimer('connect');
this._setState(S.STARTED);
const wasReconnect = this._reconnectPhase;
this._reconnectPhase = false;
if (!this._everStarted) {
this._everStarted = true;
this._emit('started');
}
let replayed = 0;
if (this._opt.audioBufferPolicy === AudioBufferPolicy.REPLAY) {
for (const item of this._replay) {
this._sendAudioFrame(item);
replayed += item.bytes.length;
}
} else {
const pend = this._pending;
this._pending = [];
for (const item of pend) this._sendAudioFrame(item);
}
if (wasReconnect) {
const info = { droppedBytes: this._droppedSinceLast, replayedBytes: replayed };
this._droppedSinceLast = 0;
this._ctx.logger.info('ws', `${this._id} reconnected after attempt ${this._attempt}, replayed ${replayed} bytes`);
const attempt = this._attempt;
this._attempt = 0; // consecutive failures start again after a successful reconnect
this._emit('reconnected', attempt, info);
callHook(this._ctx.events, 'onReconnect', [this._id, attempt, true], this._ctx.logger);
}
if (this._endRequested && this._state === S.STARTED) this._sendEnd();
else this._updateHeartbeat();
}
_onErrorFrame(f) {
const code = Number(f.code) || 0;
if (code === 0 && f.message === 'unknown cmd') {
// A server without heartbeat support answers {"cmd":"ping"} like this. Never terminal.
if (this._pingsSent > 0) {
this._hbDisabled = true;
this._pingSentAt = null;
this._ctx.setPingSupport('unsupported');
this._ctx.logger.info('ws', `${this._id} server does not support {"cmd":"ping"}; heartbeat off`);
this._updateHeartbeat();
} else {
this._ctx.logger.warn('ws', `${this._id} unexpected "unknown cmd" frame ignored`);
}
return;
}
const err = YuguErrors.fromWsFrame(f, { idempotencyKey: this._key });
if (isRetryable(err)) {
this._ctx.logger.warn('ws', `${this._id} retryable server error: ${describeError(err)} ${err.message}`);
this._retireSocket(1000, 'retryable server error');
this._handleFailure(err);
return;
}
this._fail(err);
}
_onResultFrame(f) {
if (!(this._state === S.CONNECTED || this._state === S.STARTED || this._state === S.ENDING)) return;
this._clearTimers();
const result = normalizeEvalResult(f, {
mode: this._mode,
coreType: this._coreType,
idempotencyKey: this._key,
replayed: f.replayed === true,
localWarnings: this._localWarnings,
});
this._result = result;
this._setState(S.COMPLETED);
this._emit('result', result);
for (const w of this._waiters.splice(0)) w.resolve(result);
this._beginClose(1000, 'completed');
}
_onSocketError(gen, ev) {
if (gen !== this._gen || TERMINAL.has(this._state)) return;
const detail = redactUrl((ev && (ev.message || (ev.error && ev.error.message))) || '');
const m = /Unexpected server response: (\d{3})/.exec(detail);
let err;
if (m) {
const status = Number(m[1]);
err = YuguErrors.fromHttp(status, '', { message: `WebSocket 握手被拒绝，HTTP ${status}`, idempotencyKey: this._key });
} else {
const code = ev && ev.error && (ev.error.code || (ev.error.cause && ev.error.cause.code));
if (code && /CERT|SSL|TLS|SELF_SIGNED/i.test(String(code))) {
err = localError(90011, String(code), { cause: ev.error });
} else {
err = localError(90001, `WebSocket 连接错误${detail ? `：${detail}` : ''}`, { cause: ev && ev.error ? ev.error : undefined });
}
}
this._closeCode = 1006;
this._closeReason = detail;
this._onTransportFailure(gen, err);
}
_onSocketClose(gen, ev) {
const code = ev && typeof ev.code === 'number' ? ev.code : 1006;
let reason = ev && ev.reason != null ? ev.reason : '';
if (typeof reason !== 'string') reason = String(reason);
if (gen === this._finalGen) {
this._finalize(code, reason);
return;
}
if (gen !== this._gen || TERMINAL.has(this._state)) return;
this._closeCode = code;
this._closeReason = reason;
let err;
if (code === 1000) {
err = localError(90005, '服务端正常关闭了连接，但没有返回终评结果');
} else if (TERMINAL_CLOSE_CODES.has(code) || (code >= 4000 && code <= 4999)) {
const why = code === 1009 ? '，单帧超过服务端上限 128 KB' : '';
err = localError(90005, `服务端以 ${code} 关闭连接${why}${reason ? `：${reason}` : ''}`);
} else {
err = localError(90001, `连接异常关闭，code ${code}${reason ? ` ${reason}` : ''}`);
}
err.idempotencyKey = this._key;
this._ws = null;
this._onTransportFailure(gen, err);
}
// ------------------------------------------------------------------ internal: failure and reconnect
_onTransportFailure(gen, err) {
if (gen !== this._gen || TERMINAL.has(this._state)) return;
this._ctx.logger.warn('ws', `${this._id} ${this._state}: ${describeError(err)} ${err.message}`);
this._retireSocket(1000, 'transport failure');
this._handleFailure(err);
}
_retireSocket(code, reason) {
const ws = this._ws;
this._ws = null;
this._gen += 1;
this._clearTimer('connect');
this._clearTimer('result');
this._stopHeartbeat();
if (ws) {
neutralize(ws);
safeClose(ws, code, reason);
}
}
_handleFailure(err) {
if (TERMINAL.has(this._state)) return;
if (!err.idempotencyKey && this._key) err.idempotencyKey = this._key;
const policy = this._opt.reconnect;
const buffer = this._opt.audioBufferPolicy;
if (buffer === AudioBufferPolicy.DROP) {
// DROP keeps nothing: audio the failed connection received and audio still queued is lost.
let lost = this._sentOnConn;
for (const item of this._pending) lost += item.bytes.length;
this._pending = [];
this._droppedSinceLast += lost;
this._droppedBytes += lost;
}
this._sentOnConn = 0;
if (this._reconnectPhase && this._attempt > 0) {
callHook(this._ctx.events, 'onReconnect', [this._id, this._attempt, false], this._ctx.logger);
}
const allowed = policy.enabled && policy.maxAttempts > 0 && buffer !== AudioBufferPolicy.FAIL && this._key != null;
if (!allowed || !isRetryable(err)) {
if (allowed === false && this._key == null && policy.enabled) {
this._ctx.logger.debug('ws', `${this._id} 未带幂等键，不重连`);
}
this._fail(err);
return;
}
if (this._attempt >= policy.maxAttempts || this._totalReconnects >= policy.maxAttempts * TOTAL_RECONNECT_FACTOR) {
this._fail(localError(90006, `连续重连 ${this._attempt} 次，累计重连 ${this._totalReconnects} 次，最后一次原因：${err.message}`, {
cause: err,
attempts: this._connections,
idempotencyKey: this._key,
}));
return;
}
if (buffer === AudioBufferPolicy.REPLAY && this._overflow) {
this._fail(localError(90008, `重放缓冲超过 ${this._opt.maxReplayBytes} 字节`, { cause: err, idempotencyKey: this._key }));
return;
}
this._attempt += 1;
this._totalReconnects += 1;
this._reconnectPhase = true;
const delay = computeBackoffDelay(policy, this._attempt, this._ctx.random);
this._setState(S.RECONNECTING);
this._emit('reconnecting', this._attempt, delay, err);
this._timers.reconnect = setTimeout(() => {
this._timers.reconnect = null;
this._connect().catch((e) => this._internalError(e));
}, delay);
}
_fail(err) {
if (TERMINAL.has(this._state)) return;
this._clearTimers();
if (err instanceof YuguError) {
if (!err.idempotencyKey && this._key) err.idempotencyKey = this._key;
if (!err.attempts) err.attempts = Math.max(1, this._connections);
}
this._error = err;
this._setState(S.FAILED);
this._emit('error', err);
this._rejectWaiters(err);
this._beginClose(1000, 'failed');
}
_rejectWaiters(err) {
for (const w of this._waiters.splice(0)) w.reject(err);
}
_beginClose(code, reason) {
const ws = this._ws;
if (!ws || ws.readyState === WS_CLOSED) {
this._ws = null;
this._finalize(this._closeCode != null ? this._closeCode : code, this._closeReason || reason);
return;
}
this._finalGen = this._gen;
const gen = this._gen;
try {
ws.onmessage = NOOP;
ws.onerror = NOOP;
ws.onclose = (ev) => this._guard(() => this._onSocketClose(gen, ev));
} catch (_) {
/* ignore */
}
safeClose(ws, code, reason);
this._timers.close = setTimeout(() => {
this._timers.close = null;
this._finalize(code, reason);
}, CLOSE_GRACE_MS);
}
_finalize(code, reason) {
if (this._closedDone) return;
this._closedDone = true;
this._clearTimers();
this._clearTimer('close');
if (this._ws) {
neutralize(this._ws);
safeClose(this._ws, 1000, 'closed');
this._ws = null;
}
this._finalGen = -1;
if (this._opt.signal && this._abortHandler) {
try {
this._opt.signal.removeEventListener('abort', this._abortHandler);
} catch (_) {
/* ignore */
}
}
this._replay = [];
this._pending = [];
this._setState(S.CLOSED);
this._emit('closed', code, reason || '');
this._ctx.unregister(this);
for (const w of this._closedWaiters.splice(0)) w();
}
// ------------------------------------------------------------------ internal: sending
_pushReplay(item) {
if (this._overflow) return;
if (this._replayBytes + item.bytes.length > this._opt.maxReplayBytes) {
this._overflow = true;
this._ctx.logger.warn('ws', `${this._id} replay buffer exceeds ${this._opt.maxReplayBytes} bytes; the next reconnect fails with 90008`);
return;
}
this._replay.push(item);
this._replayBytes += item.bytes.length;
}
_sendAudioFrame(item) {
if (!this._ws) return;
const gen = this._gen;
try {
const b = item.bytes;
for (let off = 0; off < b.length; off += MAX_AUDIO_FRAME_BYTES) {
const part = b.length <= MAX_AUDIO_FRAME_BYTES ? b : b.subarray(off, off + MAX_AUDIO_FRAME_BYTES);
if (item.base64) this._ws.send(JSON.stringify({ cmd: 'audio', data: bytesToBase64(part) }));
else this._ws.send(part);
this._sentOnConn += part.length;
}
} catch (e) {
this._onTransportFailure(gen, localError(90001, `发送音频失败：${e && e.message}`, { cause: e }));
}
}
_sendJson(obj) {
if (!this._ws) return;
try {
this._ws.send(JSON.stringify(obj));
} catch (e) {
this._onTransportFailure(this._gen, localError(90001, `发送帧失败：${e && e.message}`, { cause: e }));
}
}
_sendEnd() {
const gen = this._gen;
this._sendJson({ cmd: 'end' });
if (gen !== this._gen || this._state !== S.STARTED) return;
this._setState(S.ENDING);
this._stopHeartbeat();
this._timers.result = setTimeout(() => {
this._timers.result = null;
this._onTransportFailure(gen, localError(90007, `end 之后 ${this._opt.resultTimeoutMs} ms 未收到终评结果`));
}, this._opt.resultTimeoutMs);
}
// ------------------------------------------------------------------ internal: heartbeat
_heartbeatWanted() {
if (!(this._state === S.CONNECTED || this._state === S.STARTED)) return false;
if (this._hbDisabled) return false;
const mode = this._opt.heartbeat;
if (mode === false) return false;
if (mode === true) return true;
const support = this._ctx.getPingSupport();
if (support === 'supported') return true;
if (support === 'unsupported') return false;
// Unknown: probe only on native sessions in STARTED. A native server without ping support
// answers "unknown cmd" and goes on; a compat server would take the ping as a parameter frame.
return this._mode === 'native' && this._state === S.STARTED;
}
_updateHeartbeat() {
const want = this._heartbeatWanted();
if (want && !this._timers.heartbeat) {
const gen = this._gen;
this._pingSentAt = null;
this._timers.heartbeat = setInterval(() => this._guard(() => this._heartbeatTick(gen)), this._opt.heartbeatIntervalMs);
} else if (!want) {
this._stopHeartbeat();
}
}
_stopHeartbeat() {
if (this._timers.heartbeat) {
clearInterval(this._timers.heartbeat);
this._timers.heartbeat = null;
}
this._pingSentAt = null;
}
_heartbeatTick(gen) {
if (gen !== this._gen || !this._heartbeatWanted()) {
this._stopHeartbeat();
return;
}
const now = Date.now();
if (this._pingSentAt != null && now - this._pingSentAt >= this._opt.heartbeatTimeoutMs) {
this._onTransportFailure(gen, localError(90002, `心跳 ${this._opt.heartbeatTimeoutMs} ms 内没有应答`));
return;
}
this._sendJson({ cmd: 'ping' });
this._pingsSent += 1;
if (this._pingSentAt == null) this._pingSentAt = now;
}
// ------------------------------------------------------------------ internal: state and events
_setState(next) {
const prev = this._state;
if (prev === next) return;
this._state = next;
this._ctx.logger.debug('ws', `${this._id} ${prev} -> ${next}`);
this._emit('stateChanged', prev, next);
}
_emit(kind, ...args) {
this._queue.push([kind, args]);
if (this._draining) return;
this._draining = true;
try {
while (this._queue.length) {
const [k, a] = this._queue.shift();
this._deliver(k, a);
}
} finally {
this._draining = false;
}
}
_deliver(kind, args) {
if (kind === 'stateChanged') {
this._announced = args[1];
this._call('onStateChanged', args);
callHook(this._ctx.events, 'onSessionStateChanged', [this._id, args[0], args[1]], this._ctx.logger);
return;
}
this._call(HANDLER[kind], args);
}
_call(name, args) {
const l = this._listener;
if (!l) return;
const fn = l[name];
if (typeof fn !== 'function') return;
try {
fn.apply(l, args);
} catch (e) {
this._ctx.logger.error('ws', `${this._id} listener.${name} threw`, e);
}
}
_clearTimer(name) {
const t = this._timers[name];
if (t) {
if (name === 'heartbeat') clearInterval(t);
else clearTimeout(t);
this._timers[name] = null;
}
}
_clearTimers() {
this._clearTimer('connect');
this._clearTimer('result');
this._clearTimer('reconnect');
this._stopHeartbeat();
}
}
|