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-rw-r--r--ext/bg/js/audio-downloader.js317
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diff --git a/ext/bg/js/audio-downloader.js b/ext/bg/js/audio-downloader.js
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--- a/ext/bg/js/audio-downloader.js
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-/*
- * Copyright (C) 2017-2021 Yomichan Authors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <https://www.gnu.org/licenses/>.
- */
-
-/* global
- * JsonSchemaValidator
- * NativeSimpleDOMParser
- * SimpleDOMParser
- */
-
-class AudioDownloader {
- constructor({japaneseUtil, requestBuilder}) {
- this._japaneseUtil = japaneseUtil;
- this._requestBuilder = requestBuilder;
- this._customAudioListSchema = null;
- this._schemaValidator = null;
- this._getInfoHandlers = new Map([
- ['jpod101', this._getInfoJpod101.bind(this)],
- ['jpod101-alternate', this._getInfoJpod101Alternate.bind(this)],
- ['jisho', this._getInfoJisho.bind(this)],
- ['text-to-speech', this._getInfoTextToSpeech.bind(this)],
- ['text-to-speech-reading', this._getInfoTextToSpeechReading.bind(this)],
- ['custom', this._getInfoCustom.bind(this)]
- ]);
- }
-
- async getExpressionAudioInfoList(source, expression, reading, details) {
- const handler = this._getInfoHandlers.get(source);
- if (typeof handler === 'function') {
- try {
- return await handler(expression, reading, details);
- } catch (e) {
- // NOP
- }
- }
- return [];
- }
-
- async downloadExpressionAudio(sources, expression, reading, details) {
- for (const source of sources) {
- const infoList = await this.getExpressionAudioInfoList(source, expression, reading, details);
- for (const info of infoList) {
- switch (info.type) {
- case 'url':
- try {
- return await this._downloadAudioFromUrl(info.url, source);
- } catch (e) {
- // NOP
- }
- break;
- }
- }
- }
-
- throw new Error('Could not download audio');
- }
-
- // Private
-
- _normalizeUrl(url, base) {
- return new URL(url, base).href;
- }
-
- async _getInfoJpod101(expression, reading) {
- let kana = reading;
- let kanji = expression;
-
- if (!kana && this._japaneseUtil.isStringEntirelyKana(kanji)) {
- kana = kanji;
- kanji = null;
- }
-
- const params = [];
- if (kanji) {
- params.push(`kanji=${encodeURIComponent(kanji)}`);
- }
- if (kana) {
- params.push(`kana=${encodeURIComponent(kana)}`);
- }
-
- const url = `https://assets.languagepod101.com/dictionary/japanese/audiomp3.php?${params.join('&')}`;
- return [{type: 'url', url}];
- }
-
- async _getInfoJpod101Alternate(expression, reading) {
- const fetchUrl = 'https://www.japanesepod101.com/learningcenter/reference/dictionary_post';
- const data = `post=dictionary_reference&match_type=exact&search_query=${encodeURIComponent(expression)}&vulgar=true`;
- const response = await this._requestBuilder.fetchAnonymous(fetchUrl, {
- method: 'POST',
- mode: 'cors',
- cache: 'default',
- credentials: 'omit',
- redirect: 'follow',
- referrerPolicy: 'no-referrer',
- headers: {
- 'Content-Type': 'application/x-www-form-urlencoded'
- },
- body: data
- });
- const responseText = await response.text();
-
- const dom = this._createSimpleDOMParser(responseText);
- for (const row of dom.getElementsByClassName('dc-result-row')) {
- try {
- const audio = dom.getElementByTagName('audio', row);
- if (audio === null) { continue; }
-
- const source = dom.getElementByTagName('source', audio);
- if (source === null) { continue; }
-
- let url = dom.getAttribute(source, 'src');
- if (url === null) { continue; }
-
- const htmlReadings = dom.getElementsByClassName('dc-vocab_kana');
- if (htmlReadings.length === 0) { continue; }
-
- const htmlReading = dom.getTextContent(htmlReadings[0]);
- if (htmlReading && (!reading || reading === htmlReading)) {
- url = this._normalizeUrl(url, response.url);
- return [{type: 'url', url}];
- }
- } catch (e) {
- // NOP
- }
- }
-
- throw new Error('Failed to find audio URL');
- }
-
- async _getInfoJisho(expression, reading) {
- const fetchUrl = `https://jisho.org/search/${expression}`;
- const response = await this._requestBuilder.fetchAnonymous(fetchUrl, {
- method: 'GET',
- mode: 'cors',
- cache: 'default',
- credentials: 'omit',
- redirect: 'follow',
- referrerPolicy: 'no-referrer'
- });
- const responseText = await response.text();
-
- const dom = this._createSimpleDOMParser(responseText);
- try {
- const audio = dom.getElementById(`audio_${expression}:${reading}`);
- if (audio !== null) {
- const source = dom.getElementByTagName('source', audio);
- if (source !== null) {
- let url = dom.getAttribute(source, 'src');
- if (url !== null) {
- url = this._normalizeUrl(url, response.url);
- return [{type: 'url', url}];
- }
- }
- }
- } catch (e) {
- // NOP
- }
-
- throw new Error('Failed to find audio URL');
- }
-
- async _getInfoTextToSpeech(expression, reading, {textToSpeechVoice}) {
- if (!textToSpeechVoice) {
- throw new Error('No voice');
- }
- return [{type: 'tts', text: expression, voice: textToSpeechVoice}];
- }
-
- async _getInfoTextToSpeechReading(expression, reading, {textToSpeechVoice}) {
- if (!textToSpeechVoice) {
- throw new Error('No voice');
- }
- return [{type: 'tts', text: reading || expression, voice: textToSpeechVoice}];
- }
-
- async _getInfoCustom(expression, reading, {customSourceUrl, customSourceType}) {
- if (typeof customSourceUrl !== 'string') {
- throw new Error('No custom URL defined');
- }
- const data = {expression, reading};
- const url = customSourceUrl.replace(/\{([^}]*)\}/g, (m0, m1) => (Object.prototype.hasOwnProperty.call(data, m1) ? `${data[m1]}` : m0));
-
- switch (customSourceType) {
- case 'json':
- return await this._getInfoCustomJson(url);
- default:
- return [{type: 'url', url}];
- }
- }
-
- async _getInfoCustomJson(url) {
- const response = await this._requestBuilder.fetchAnonymous(url, {
- method: 'GET',
- mode: 'cors',
- cache: 'default',
- credentials: 'omit',
- redirect: 'follow',
- referrerPolicy: 'no-referrer'
- });
-
- if (!response.ok) {
- throw new Error(`Invalid response: ${response.status}`);
- }
-
- const responseJson = await response.json();
-
- const schema = await this._getCustomAudioListSchema();
- if (this._schemaValidator === null) {
- this._schemaValidator = new JsonSchemaValidator();
- }
- this._schemaValidator.validate(responseJson, schema);
-
- const results = [];
- for (const {url: url2, name} of responseJson.audioSources) {
- const info = {type: 'url', url: url2};
- if (typeof name === 'string') { info.name = name; }
- results.push(info);
- }
- return results;
- }
-
- async _downloadAudioFromUrl(url, source) {
- const response = await this._requestBuilder.fetchAnonymous(url, {
- method: 'GET',
- mode: 'cors',
- cache: 'default',
- credentials: 'omit',
- redirect: 'follow',
- referrerPolicy: 'no-referrer'
- });
-
- if (!response.ok) {
- throw new Error(`Invalid response: ${response.status}`);
- }
-
- const arrayBuffer = await response.arrayBuffer();
-
- if (!await this._isAudioBinaryValid(arrayBuffer, source)) {
- throw new Error('Could not retrieve audio');
- }
-
- const data = this._arrayBufferToBase64(arrayBuffer);
- const contentType = response.headers.get('Content-Type');
- return {data, contentType};
- }
-
- async _isAudioBinaryValid(arrayBuffer, source) {
- switch (source) {
- case 'jpod101':
- {
- const digest = await this._arrayBufferDigest(arrayBuffer);
- switch (digest) {
- case 'ae6398b5a27bc8c0a771df6c907ade794be15518174773c58c7c7ddd17098906': // Invalid audio
- return false;
- default:
- return true;
- }
- }
- default:
- return true;
- }
- }
-
- async _arrayBufferDigest(arrayBuffer) {
- const hash = new Uint8Array(await crypto.subtle.digest('SHA-256', new Uint8Array(arrayBuffer)));
- let digest = '';
- for (const byte of hash) {
- digest += byte.toString(16).padStart(2, '0');
- }
- return digest;
- }
-
- _arrayBufferToBase64(arrayBuffer) {
- return btoa(String.fromCharCode(...new Uint8Array(arrayBuffer)));
- }
-
- _createSimpleDOMParser(content) {
- if (typeof NativeSimpleDOMParser !== 'undefined' && NativeSimpleDOMParser.isSupported()) {
- return new NativeSimpleDOMParser(content);
- } else if (typeof SimpleDOMParser !== 'undefined' && SimpleDOMParser.isSupported()) {
- return new SimpleDOMParser(content);
- } else {
- throw new Error('DOM parsing not supported');
- }
- }
-
- async _getCustomAudioListSchema() {
- let schema = this._customAudioListSchema;
- if (schema === null) {
- const url = chrome.runtime.getURL('/data/schemas/custom-audio-list-schema.json');
- const response = await fetch(url, {
- method: 'GET',
- mode: 'no-cors',
- cache: 'default',
- credentials: 'omit',
- redirect: 'follow',
- referrerPolicy: 'no-referrer'
- });
- schema = await response.json();
- this._customAudioListSchema = schema;
- }
- return schema;
- }
-}