137 lines
No EOL
7.6 KiB
JavaScript
137 lines
No EOL
7.6 KiB
JavaScript
'use strict';Object.defineProperty(exports,'__esModule',{value:true});/*! *****************************************************************************
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Copyright (c) Microsoft Corporation.
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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PERFORMANCE OF THIS SOFTWARE.
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***************************************************************************** */
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function __awaiter(thisArg, _arguments, P, generator) {
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function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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});
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}const RE_YOUTUBE = /(?:youtube\.com\/(?:[^\/]+\/.+\/|(?:v|e(?:mbed)?)\/|.*[?&]v=)|youtu\.be\/)([^"&?\/\s]{11})/i;
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const USER_AGENT = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36,gzip(gfe)';
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const RE_XML_TRANSCRIPT = /<text start="([^"]*)" dur="([^"]*)">([^<]*)<\/text>/g;
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class YoutubeTranscriptError extends Error {
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constructor(message) {
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super(`[YoutubeTranscript] 🚨 ${message}`);
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}
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}
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class YoutubeTranscriptTooManyRequestError extends YoutubeTranscriptError {
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constructor() {
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super('YouTube is receiving too many requests from this IP and now requires solving a captcha to continue');
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}
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}
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class YoutubeTranscriptVideoUnavailableError extends YoutubeTranscriptError {
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constructor(videoId) {
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super(`The video is no longer available (${videoId})`);
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}
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}
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class YoutubeTranscriptDisabledError extends YoutubeTranscriptError {
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constructor(videoId) {
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super(`Transcript is disabled on this video (${videoId})`);
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}
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}
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class YoutubeTranscriptNotAvailableError extends YoutubeTranscriptError {
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constructor(videoId) {
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super(`No transcripts are available for this video (${videoId})`);
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}
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}
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class YoutubeTranscriptNotAvailableLanguageError extends YoutubeTranscriptError {
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constructor(lang, availableLangs, videoId) {
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super(`No transcripts are available in ${lang} this video (${videoId}). Available languages: ${availableLangs.join(', ')}`);
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}
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}
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/**
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* Class to retrieve transcript if exist
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*/
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class YoutubeTranscript {
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/**
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* Fetch transcript from YTB Video
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* @param videoId Video url or video identifier
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* @param config Get transcript in a specific language ISO
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*/
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static fetchTranscript(videoId, config) {
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var _a;
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return __awaiter(this, void 0, void 0, function* () {
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const identifier = this.retrieveVideoId(videoId);
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const videoPageResponse = yield fetch(`https://www.youtube.com/watch?v=${identifier}`, {
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headers: Object.assign(Object.assign({}, ((config === null || config === void 0 ? void 0 : config.lang) && { 'Accept-Language': config.lang })), { 'User-Agent': USER_AGENT }),
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});
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const videoPageBody = yield videoPageResponse.text();
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const splittedHTML = videoPageBody.split('"captions":');
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if (splittedHTML.length <= 1) {
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if (videoPageBody.includes('class="g-recaptcha"')) {
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throw new YoutubeTranscriptTooManyRequestError();
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}
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if (!videoPageBody.includes('"playabilityStatus":')) {
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throw new YoutubeTranscriptVideoUnavailableError(videoId);
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}
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throw new YoutubeTranscriptDisabledError(videoId);
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}
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const captions = (_a = (() => {
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try {
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return JSON.parse(splittedHTML[1].split(',"videoDetails')[0].replace('\n', ''));
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}
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catch (e) {
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return undefined;
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}
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})()) === null || _a === void 0 ? void 0 : _a['playerCaptionsTracklistRenderer'];
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if (!captions) {
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throw new YoutubeTranscriptDisabledError(videoId);
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}
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if (!('captionTracks' in captions)) {
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throw new YoutubeTranscriptNotAvailableError(videoId);
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}
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if ((config === null || config === void 0 ? void 0 : config.lang) &&
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!captions.captionTracks.some((track) => track.languageCode === (config === null || config === void 0 ? void 0 : config.lang))) {
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throw new YoutubeTranscriptNotAvailableLanguageError(config === null || config === void 0 ? void 0 : config.lang, captions.captionTracks.map((track) => track.languageCode), videoId);
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}
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const transcriptURL = ((config === null || config === void 0 ? void 0 : config.lang) ? captions.captionTracks.find((track) => track.languageCode === (config === null || config === void 0 ? void 0 : config.lang))
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: captions.captionTracks[0]).baseUrl;
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const transcriptResponse = yield fetch(transcriptURL, {
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headers: Object.assign(Object.assign({}, ((config === null || config === void 0 ? void 0 : config.lang) && { 'Accept-Language': config.lang })), { 'User-Agent': USER_AGENT }),
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});
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if (!transcriptResponse.ok) {
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throw new YoutubeTranscriptNotAvailableError(videoId);
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}
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const transcriptBody = yield transcriptResponse.text();
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const results = [...transcriptBody.matchAll(RE_XML_TRANSCRIPT)];
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return results.map((result) => {
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var _a;
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return ({
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text: result[3],
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duration: parseFloat(result[2]),
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offset: parseFloat(result[1]),
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lang: (_a = config === null || config === void 0 ? void 0 : config.lang) !== null && _a !== void 0 ? _a : captions.captionTracks[0].languageCode,
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});
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});
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});
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}
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/**
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* Retrieve video id from url or string
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* @param videoId video url or video id
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*/
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static retrieveVideoId(videoId) {
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if (videoId.length === 11) {
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return videoId;
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}
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const matchId = videoId.match(RE_YOUTUBE);
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if (matchId && matchId.length) {
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return matchId[1];
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}
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throw new YoutubeTranscriptError('Impossible to retrieve Youtube video ID.');
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}
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}exports.YoutubeTranscript=YoutubeTranscript;exports.YoutubeTranscriptDisabledError=YoutubeTranscriptDisabledError;exports.YoutubeTranscriptError=YoutubeTranscriptError;exports.YoutubeTranscriptNotAvailableError=YoutubeTranscriptNotAvailableError;exports.YoutubeTranscriptNotAvailableLanguageError=YoutubeTranscriptNotAvailableLanguageError;exports.YoutubeTranscriptTooManyRequestError=YoutubeTranscriptTooManyRequestError;exports.YoutubeTranscriptVideoUnavailableError=YoutubeTranscriptVideoUnavailableError; |