/* * 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 * JsonSchema * NativeSimpleDOMParser * SimpleDOMParser * StringUtil */ class AudioDownloader { constructor({japaneseUtil, requestBuilder}) { this._japaneseUtil = japaneseUtil; this._requestBuilder = requestBuilder; this._customAudioListSchema = 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)], ['custom-json', this._getInfoCustomJson.bind(this)] ]); } async getTermAudioInfoList(source, term, reading) { const handler = this._getInfoHandlers.get(source.type); if (typeof handler === 'function') { try { return await handler(term, reading, source); } catch (e) { // NOP } } return []; } async downloadTermAudio(sources, preferredAudioIndex, term, reading) { for (const source of sources) { let infoList = await this.getTermAudioInfoList(source, term, reading); if (typeof preferredAudioIndex === 'number') { infoList = (preferredAudioIndex >= 0 && preferredAudioIndex < infoList.length ? [infoList[preferredAudioIndex]] : []); } for (const info of infoList) { switch (info.type) { case 'url': try { return await this._downloadAudioFromUrl(info.url, source.type); } catch (e) { // NOP } break; } } } throw new Error('Could not download audio'); } // Private _normalizeUrl(url, base) { return new URL(url, base).href; } async _getInfoJpod101(term, reading) { if (reading === term && this._japaneseUtil.isStringEntirelyKana(term)) { reading = term; term = null; } const params = new URLSearchParams(); if (term) { params.set('kanji', term); } if (reading) { params.set('kana', reading); } const url = `https://assets.languagepod101.com/dictionary/japanese/audiomp3.php?${params.toString()}`; return [{type: 'url', url}]; } async _getInfoJpod101Alternate(term, reading) { const fetchUrl = 'https://www.japanesepod101.com/learningcenter/reference/dictionary_post'; const data = new URLSearchParams({ post: 'dictionary_reference', match_type: 'exact', search_query: term, vulgar: 'true' }); const response = await this._requestBuilder.fetchAnonymous(fetchUrl, { method: 'POST', mode: 'cors', cache: 'default', credentials: 'omit', redirect: 'follow', referrerPolicy: 'no-referrer', headers: { 'Content-Type': 'application/x-www-form-urlencoded' }, body: data }); const responseText = await response.text(); const dom = this._createSimpleDOMParser(responseText); for (const row of dom.getElementsByClassName('dc-result-row')) { try { const audio = dom.getElementByTagName('audio', row); if (audio === null) { continue; } const source = dom.getElementByTagName('source', audio); if (source === null) { continue; } let url = dom.getAttribute(source, 'src'); if (url === null) { continue; } const htmlReadings = dom.getElementsByClassName('dc-vocab_kana'); if (htmlReadings.length === 0) { continue; } const htmlReading = dom.getTextContent(htmlReadings[0]); if (htmlReading && (reading === term || reading === htmlReading)) { url = this._normalizeUrl(url, response.url); return [{type: 'url', url}]; } } catch (e) { // NOP } } throw new Error('Failed to find audio URL'); } async _getInfoJisho(term, reading) { const fetchUrl = `https://jisho.org/search/${term}`; 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_${term}:${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(term, reading, {voice}) { if (!voice) { throw new Error('No voice'); } return [{type: 'tts', text: term, voice: voice}]; } async _getInfoTextToSpeechReading(term, reading, {voice}) { if (!voice) { throw new Error('No voice'); } return [{type: 'tts', text: reading, voice: voice}]; } async _getInfoCustom(term, reading, {url}) { url = this._getCustomUrl(term, reading, url); return [{type: 'url', url}]; } async _getInfoCustomJson(term, reading, {url}) { url = this._getCustomUrl(term, reading, 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: ${response.status}`); } const responseJson = await response.json(); if (this._customAudioListSchema === null) { const schema = await this._getCustomAudioListSchema(); this._customAudioListSchema = new JsonSchema(schema); } this._customAudioListSchema.validate(responseJson); const results = []; for (const {url: url2, name} of responseJson.audioSources) { const info = {type: 'url', url: url2}; if (typeof name === 'string') { info.name = name; } results.push(info); } return results; } _getCustomUrl(term, reading, url) { if (typeof url !== 'string') { throw new Error('No custom URL defined'); } const data = {term, reading}; return url.replace(/\{([^}]*)\}/g, (m0, m1) => (Object.prototype.hasOwnProperty.call(data, m1) ? `${data[m1]}` : m0)); } async _downloadAudioFromUrl(url, sourceType) { 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, sourceType)) { throw new Error('Could not retrieve audio'); } const data = StringUtil.arrayBufferToBase64(arrayBuffer); const contentType = response.headers.get('Content-Type'); return {data, contentType}; } async _isAudioBinaryValid(arrayBuffer, sourceType) { switch (sourceType) { 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; } _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() { 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' }); return await response.json(); } }