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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 | 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 165x 165x 165x 165x 165x 165x 165x 165x 9x 259x 259x 259x 259x 259x 9x 9x 9x 9x 9x 9x 124x 1x 1x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 123x 124x 9x 9x 9x 4x 4x 9x 9x 9x 26x 26x 9x 9x 9x 1x 1x 9x 9x 9x 1x 1x 9x 9x 9x 2378x 2378x 9x 9x 9x 16x 16x 9x 9x 9x 2x 1x 1x 1x 2x 9x 9x 9x 12x 12x 12x 12x 12x 12x 12x 12x 12x 12x 9x 9x 9x 9x 9x 9x 9x 4766x 4766x 4766x 4x 4x 4x 4x 4x 4x 4766x 4766x 4766x 4766x 4766x 4766x 4766x 3307x 3307x 3307x 3307x 1984x 379x 358x 358x 358x 21x 21x 21x 21x 1631x 106x 1075x 4766x 9x 9x 9x 9x 9x 9x 76x 75x 75x 76x 37x 37x 37x 37x 37x 1x 1x 1x 36x 37x 4x 4x 4x 36x 76x 76x 9x 9x 9x 25x 21x 21x 21x 21x 25x 9x 9x 9x 5x 5x 5x 9x 9x 9x 8x 8x 8x 4x 4x 2x 8x 9x 9x 9x 9x 123x 123x 2x 1x 1x 1x 1x 1x 1x 122x 122x 122x 2x 122x 122x 123x 9x 9x 1x 1x 1x 9x 9x 193x 193x 193x 193x 193x 193x 193x 193x 193x 2x 2x 193x 193x 193x 193x 193x 1x 1x 1x 193x 193x 193x 193x 193x 193x 1x 1x 1x 191x 191x 191x 193x 191x 153x 191x 191x 191x 191x 193x 9x 9x 1018x 1018x 1018x 1018x 9x 9x 9x 9x 9x 9x 664x 664x 664x 664x 664x 3x 3x 3x 2x 2x 2x 2x 3x 664x 1x 1x 1x 663x 663x 663x 664x 2x 2x 2x 664x 660x 664x 9x 9x 660x 660x 6x 6x 6x 6x 660x 153x 153x 153x 660x 146x 146x 146x 660x 9x 9x 9x 660x 1x 1x 1x 1x 1x 1x 1x 660x 72x 72x 72x 660x 272x 272x 272x 1x 660x 9x 9x 9x 9x 9x 9x 9x 9x 9x 272x 272x 245x 245x 12x 12x 12x 12x 12x 12x 12x 233x 233x 260x 272x 9x 9x 153x 153x 153x 113x 113x 113x 153x 153x 153x 153x 153x 153x 9x 9x 146x 145x 145x 145x 145x 146x 105x 105x 105x 145x 146x 128x 2356x 2356x 2356x 146x 17x 17x 17x 17x 146x 43x 43x 43x 43x 43x 43x 43x 43x 43x 146x 119x 146x 9x 9x 9x 9x 3x 3x 2x 2x 2x 2x 2x 3x 1x 1x 3x 3x 6x 9x 3x 3x 3x 3x 3x 3x 9x 9x 9x 72x 72x 72x 72x 72x 72x 72x 72x 72x 72x 72x 72x 72x 72x 72x 9x 9x 57x 57x 57x 57x 57x 15x 15x 57x 42x 42x 1x 42x 41x 41x 42x 57x 57x 57x 57x 9x 9x 117x 117x 117x 117x 91x 91x 91x 117x 26x 26x 26x 96x 1x 96x 8x 8x 25x 17x 17x 26x 26x 26x 117x 9x 9x 9x 9x 95x 95x 95x 95x 95x 9x 9x 98x 98x 98x 98x 98x 98x 98x 71x 71x 71x 98x 9x 9x 98x 98x 98x 98x 98x 7x 7x 7x 7x 7x 7x 7x 98x 98x 30x 30x 98x 98x 18x 1x 1x 18x 18x 18x 98x 5x 5x 5x 5x 5x 5x 5x 98x 1x 1x 1x 74x 74x 74x 74x 74x 74x 74x 73x 73x 74x 98x 9x 9x 30x 30x 30x 30x 30x 30x 30x 30x 30x 30x 30x 30x 9x 9x 51x 51x 9x 9x 123x 123x 29x 29x 29x 29x 94x 94x 94x 94x 94x 94x 123x 94x 94x 94x 123x 9x 9x 123x 123x 123x 123x 123x 94x 94x 94x 94x 123x 123x 1x 1x 1x 1x 123x 123x 123x 123x 123x 123x 123x 9x 9x 9x 9x 4058x 4058x 1x 1x 1x 1x 4057x 4057x 4058x 9x 9x 5769x 5769x 5769x 5769x 5769x 5779x 5779x 5776x 5778x 5778x 5769x 1x 1x 5769x 9x 9x 260x 260x 260x 260x 260x 9x 9x 83x 83x 83x 83x 83x 83x 5x 5x 83x 83x 9x 9x 9x 9x 319x 319x 308x 319x 319x 274x 319x 319x 252x 252x 319x 319x 9x 9x 280x 280x 101x 101x 101x 280x 165x 165x 280x 9x 9x 592x 101x 101x 101x 592x 592x 9x 9x 27x 27x 27x 3x 3x 3x 24x 24x 27x 27x 9x 9x 9x 9x 894x 894x 894x 894x 894x 894x 9x 9x 1718x 1718x 1717x 1717x 1718x 1718x 1718x 1718x 1718x 1717x 1717x 1718x 9x 9x 1718x 894x 894x 894x 894x 894x 824x 1718x 9x 9x 1718x 1718x 1715x 1718x 1668x 1668x 1718x 1x 1x 1718x 9x 9x 1202x 1202x 364x 364x 364x 364x 1202x 9x 9x 246x 246x 246x 246x 246x 9x | // 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, normalizePartial } 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;
// Reading progress last delivered to onPartial, {readUnits, matchedUnits}. Kept across REPLAY
// reconnects; DROP clears it at every successful reconnect (the new server session hears only
// the audio after the reconnect, so its progress starts from zero and need not catch up).
this._lastProgress = null;
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: ${truncate(text, 120)}`);
return;
}
if (!f || typeof f !== 'object' || Array.isArray(f)) return;
this._handleFrame(gen, f, text);
}
_handleFrame(gen, f, text) {
const ev = typeof f.event === 'string' ? f.event : null;
if (ev === 'pong') {
this._ctx.setPingSupport('supported');
this._updateHeartbeat();
return;
}
if (ev === 'connected') {
this._onConnectedFrame();
return;
}
if (ev === 'started') {
this._onStartedFrame();
return;
}
if (ev === 'error') {
this._onErrorFrame(f);
return;
}
if (ev === 'blocked' || f.blocked === true) {
this._fail(
new InvalidParameterException(typeof f.message === 'string' && f.message ? f.message : '参考文本未通过内容安全审查', {
rawBody: text,
}),
);
return;
}
if (ev === 'result' || Number(f.eof) === 1) {
this._onResultFrame(f);
return;
}
if (f.eof != null && Number(f.eof) === 0) {
this._onPartialFrame(f);
return;
}
this._ctx.logger.debug('ws', `${this._id} frame ignored: ${truncate(text, 120)}`);
}
/**
* Progress frame of either channel, also while ENDING (CONTRACT 5.5). A new server session after
* a reconnect computes the progress again from zero while the audio is replayed, so a partial with
* progress is delivered only when readUnits and matchedUnits are both at least the last delivered
* ones (with DROP the memory starts again at every successful reconnect, see _onStartedFrame).
* Partials without progress are delivered as in 2.0.0.
*/
_onPartialFrame(f) {
const partial = normalizePartial(f);
if (partial.hasProgress) {
const last = this._lastProgress;
if (last && (partial.readUnits < last.readUnits || partial.matchedUnits < last.matchedUnits)) {
this._ctx.logger.debug(
'ws',
`${this._id} progress partial dropped: read ${partial.readUnits} matched ${partial.matchedUnits}` +
` behind delivered read ${last.readUnits} matched ${last.matchedUnits}`,
);
return;
}
this._lastProgress = { readUnits: partial.readUnits, matchedUnits: partial.matchedUnits };
}
this._emit('partial', partial);
}
_onConnectedFrame() {
if (this._state !== S.CONNECTING) return;
this._setState(S.CONNECTED);
if (!this._everConnected) {
this._everConnected = true;
this._emit('connected');
}
const frame = Object.assign({}, this._params);
if (this._mode === 'native') frame.cmd = 'start';
if (this._key) frame.idempotencyKey = this._key;
this._sendJson(frame);
this._updateHeartbeat();
}
_onStartedFrame() {
if (this._state !== S.CONNECTED) return; // duplicate started frames are ignored
this._clearTimer('connect');
this._setState(S.STARTED);
const wasReconnect = this._reconnectPhase;
this._reconnectPhase = false;
if (!this._everStarted) {
this._everStarted = true;
this._emit('started');
}
let replayed = 0;
if (this._opt.audioBufferPolicy === AudioBufferPolicy.REPLAY) {
for (const item of this._replay) {
this._sendAudioFrame(item);
replayed += item.bytes.length;
}
} else {
const pend = this._pending;
this._pending = [];
for (const item of pend) this._sendAudioFrame(item);
}
if (wasReconnect) {
if (this._opt.audioBufferPolicy === AudioBufferPolicy.DROP) this._lastProgress = null;
const info = { droppedBytes: this._droppedSinceLast, replayedBytes: replayed };
this._droppedSinceLast = 0;
this._ctx.logger.info('ws', `${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();
}
}
|