Amazon Video - subtitle downloader

Allows you to download subtitles from Amazon Video

当前为 2020-05-14 提交的版本,查看 最新版本

您需要先安装一个扩展,例如 篡改猴Greasemonkey暴力猴,之后才能安装此脚本。

You will need to install an extension such as Tampermonkey to install this script.

您需要先安装一个扩展,例如 篡改猴暴力猴,之后才能安装此脚本。

您需要先安装一个扩展,例如 篡改猴Userscripts ,之后才能安装此脚本。

您需要先安装一款用户脚本管理器扩展,例如 Tampermonkey,才能安装此脚本。

您需要先安装用户脚本管理器扩展后才能安装此脚本。

(我已经安装了用户脚本管理器,让我安装!)

您需要先安装一款用户样式管理器扩展,比如 Stylus,才能安装此样式。

您需要先安装一款用户样式管理器扩展,比如 Stylus,才能安装此样式。

您需要先安装一款用户样式管理器扩展,比如 Stylus,才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

(我已经安装了用户样式管理器,让我安装!)

// ==UserScript==
// @name        Amazon Video - subtitle downloader
// @description Allows you to download subtitles from Amazon Video
// @license     MIT
// @version     1.7.4
// @namespace   tithen-firion.github.io
// @include     /^https:\/\/(www|smile)\.amazon\.com\/(gp\/(video|product)|(.*?\/)?dp)\/.+/
// @include     /^https:\/\/(www|smile)\.amazon\.de\/(gp\/(video|product)|(.*?\/)?dp)\/.+/
// @include     /^https:\/\/(www|smile)\.amazon\.co\.uk\/(gp\/(video|product)|(.*?\/)?dp)\/.+/
// @include     /^https:\/\/(www|smile)\.amazon\.co\.jp\/(gp\/(video|product)|(.*?\/)?dp)\/.+/
// @include     /^https:\/\/www\.primevideo\.com\/(gp\/video|(region\/.*?\/)?detail)/.+/
// @grant       unsafeWindow
// @grant       GM.xmlHttpRequest
// @grant       GM_xmlhttpRequest
// @require     https://greasemonkey.github.io/gm4-polyfill/gm4-polyfill.js
// @require     https://cdn.jsdelivr.net/gh/Tithen-Firion/UserScripts@7bd6406c0d264d60428cfea16248ecfb4753e5e3/libraries/xhrHijacker.js?version=1.0
// @require     https://cdn.jsdelivr.net/gh/Stuk/jszip@579beb1d45c8d586d8be4411d5b2e48dea018c06/dist/jszip.min.js?version=3.1.5
// @require     https://cdn.jsdelivr.net/gh/eligrey/FileSaver.js@283f438c31776b622670be002caf1986c40ce90c/dist/FileSaver.min.js?version=2018-12-29
// ==/UserScript==

class ProgressBar {
  constructor() {
    let container = document.querySelector('#userscript_progress_bars');
    if(container === null) {
      container = document.createElement('div');
      container.id = 'userscript_progress_bars'
      document.body.appendChild(container)
      container.style
      container.style.position = 'fixed';
      container.style.top = 0;
      container.style.left = 0;
      container.style.width = '100%';
      container.style.background = 'red';
      container.style.zIndex = '99999999';
    }
    self.container = container;
  }

  init() {
    this.current = 0;
    this.max = 0;

    this.progressElement = document.createElement('div');
    this.progressElement.style.width = 0;
    this.progressElement.style.height = '10px';
    this.progressElement.style.background = 'green';

    self.container.appendChild(this.progressElement);
  }

  increment() {
    this.current += 1;
    if(this.current <= this.max)
      this.progressElement.style.width = this.current / this.max * 100 + '%';
  }

  incrementMax() {
    this.max += 1;
    if(this.current <= this.max)
      this.progressElement.style.width = this.current / this.max * 100 + '%';
  }

  destroy() {
    this.progressElement.remove();
  }
}

var progressBar = new ProgressBar();

// add CSS style
var s = document.createElement('style');
s.innerHTML = 'p.download:hover { cursor:pointer }';
document.head.appendChild(s);

// XML to SRT
function xmlToSrt(xmlString, lang) {
  xmlString = xmlString.replace(/<tt:br\/>/gi, '\n');
  try {
    let parser = new DOMParser();
    var xmlDoc = parser.parseFromString(xmlString, 'text/xml');
  }
  catch(e) {
    console.error(e);
    alert('Failed to parse XML subtitle file');
    return null;
  }
  var lines = xmlDoc.querySelectorAll('body p');
  var srtLines = [];

  for(let i=0, l=lines.length; i < l; ++i) {
    let text = lines[i].innerHTML.trim();
    if(text != '') {
      if(lang.indexOf('ar') == 0)
      	text = text.replace(/^(?!\u202B|\u200F)/gm, '\u202B');

      srtLines.push(i+1);
      srtLines.push(lines[i].getAttribute('begin').replace('.',',') + ' --> ' + lines[i].getAttribute('end').replace('.',','));
      srtLines.push(text);
      srtLines.push('');
    }
  }
  return srtLines.join('\n');
}

// download subs and save them
function downloadSubs(url, title, downloadVars, lang) {
  GM.xmlHttpRequest({
  	url: url,
    method: 'get',
    onload: function(resp) {

    progressBar.increment();
    var srt = xmlToSrt(resp.responseText, lang);
    if(downloadVars) {
      downloadVars.zip.file(title, srt);
      --downloadVars.subCounter;
      if((downloadVars.subCounter|downloadVars.infoCounter) === 0)
        downloadVars.zip.generateAsync({type:"blob"})
          .then(function(content) {
            saveAs(content, 'subs.zip');
            progressBar.destroy();
          });
    }
    else {
      var blob = new Blob([srt], {type: 'text/plain;charset=utf-8'});
      saveAs(blob, title, true);
      progressBar.destroy();
    }

    }
  });
}

// download episodes/movie info and start downloading subs
function downloadInfo(url, downloadVars) {
  var req = new XMLHttpRequest();
  req.open('get', url);
  req.withCredentials = true;
  req.onload = function() {
    var info = JSON.parse(req.response);
    try {
    var epInfo = info.catalogMetadata.catalog;
    var ep = epInfo.episodeNumber;
    var title, season;
    if(epInfo.type == 'MOVIE' || ep === 0)
      title = epInfo.title;
    else {
      info.catalogMetadata.family.tvAncestors.forEach(function(tvAncestor) {
        switch(tvAncestor.catalog.type) {
          case 'SEASON':
            season = tvAncestor.catalog.seasonNumber;
            break;
          case 'SHOW':
            title = tvAncestor.catalog.title;
            break;
        }
      });
      title += '.S' + season.toString().padStart(2, '0') + '.E' + ep.toString().padStart(2, '0');
    }
    title = title.replace(/[:*?"<>|\\\/]+/g, '_').replace(/ /g, '.');
    title += '.WEBRip.Amazon.';
    var languages = new Set();
    var subs = info.subtitleUrls || [];
    if(subs.length > 1 && !downloadVars) {
      downloadVars = {
        subCounter: 0,
        infoCounter: 1,
        zip: new JSZip()
      };
    }

    subs.forEach(function(subInfo) {
      let lang = subInfo.languageCode;
      if(languages.has(lang))
        lang += '.' + subInfo.index;
      else
        languages.add(lang);
      if(downloadVars)
        ++downloadVars.subCounter;
      progressBar.incrementMax();
      downloadSubs(subInfo.url, title + lang + '.srt', downloadVars, lang);
    });
    if(downloadVars)
      --downloadVars.infoCounter;
    }
    catch(e) {
      console.log(info);
      alert(e);
    }
  };
  req.send(null);
}

function downloadThis(e) {
  progressBar.init();
  var id = e.target.getAttribute('data-id');
  downloadInfo(gUrl + id);
}
function downloadAll(e) {
  progressBar.init();
  var IDs = e.target.getAttribute('data-id').split(';');
  var downloadVars = {
    subCounter: 0,
    infoCounter: IDs.length,
    zip: new JSZip()
  };
  IDs.forEach(function(id) {
    downloadInfo(gUrl + id, downloadVars);
  });
}

// remove unnecessary parameters from URL
function parseURL(url) {
  var filter = ['consumptionType', 'deviceID', 'deviceTypeID', 'firmware', 'gascEnabled', 'marketplaceID', 'userWatchSessionId', 'videoMaterialType', 'clientId', 'operatingSystemName', 'operatingSystemVersion', 'customerID', 'token'];
  var urlParts = url.split('?');
  var params = ['desiredResources=CatalogMetadata%2CSubtitleUrls'];
  urlParts[1].split('&').forEach(function(param) {
    var p = param.split('=');
    if(filter.indexOf(p[0]) > -1)
      params.push(param);
  });
  params.push('resourceUsage=CacheResources');
  params.push('titleDecorationScheme=primary-content');
  params.push('asin=');
  urlParts[1] = params.join('&');
  return urlParts.join('?');
}

function createDownloadButton(id, type) {
  var p = document.createElement('p');
  p.classList.add('download');
  p.setAttribute('data-id', id);
  p.innerHTML = 'Download subs for this ' + type;
  p.addEventListener('click', (type == 'season' ? downloadAll : downloadThis));
  return p;
}

function findMovieID() {
  for(const templateElement of document.querySelectorAll('script[type="text/template"]')) {
    let data;
    try {
      data = JSON.parse(templateElement.innerHTML);
    }
    catch(ignore) {
      continue;
    }
    if(typeof data.initArgs !== 'undefined' && typeof data.initArgs.titleID !== 'undefined')
      return data.initArgs.titleID;
  }
  throw Error("Couldn't find movie ID");
}

// add download buttons
function init(url) {
  initialied = true;
  gUrl = parseURL(url);
  console.log(gUrl);

  let button;
  let epElems = document.querySelectorAll('.dv-episode-container, .avu-context-card, .js-node-episode-container');
  if(epElems.length > 0) {
    let IDs = [];
    for(let i=epElems.length; i--; ) {
      let selector, id, el;
      if((el = epElems[i].querySelector('input[name="highlight-list-selector"]')) !== null) {
        id = el.id.replace('selector-', '');
        selector = '.dv-ajaxable.js-episode-offers';
      }
      else if((el = epElems[i].querySelector('input[name="ep-list-selector"]')) !== null) {
        id = el.value;
        selector = '.av-episode-meta-info';
      }
      else if(id = epElems[i].getAttribute('data-aliases'))
        selector = '.dv-el-title';
      else
        continue;
      id = id.split(',')[0];
      epElems[i].querySelector(selector).parentNode.appendChild(createDownloadButton(id, 'episode'));
      IDs.push(id);
    }
    button = createDownloadButton(IDs.join(';'), 'season');
  }
  else {
    let pathNames = window.location.pathname.split('/');
    let id;
    let idElement = document.querySelector('[data-title-id]');
    if(idElement !== null)
      id = idElement.getAttribute('data-title-id');
    else {
      try {
        id = findMovieID();
      }
      catch(ignore) {
        if(document.location.host.indexOf('primevideo') > -1)
          id = document.querySelector('input[name="itemId"]').value;
        else
          id = unsafeWindow.ue_pti;
      }
    }
    id = id.split(',')[0];
    button = createDownloadButton(id, 'movie');
  }
  document.querySelector('.dv-node-dp-badges, .av-badges').appendChild(button);
}

var initialied = false, gUrl;
// hijack xhr, we need to find out tokens and other parameters needed for subtitle info
xhrHijacker(function(xhr, id, origin, args) {
  if(!initialied && origin === 'open')
    if(args[1].indexOf('/GetPlaybackResources') > -1)
      init(args[1])
});