git.sur5r.net Git - minitube/blob - src/video.cpp

   1 /* $BEGIN_LICENSE
   2
   3 This file is part of Minitube.
   4 Copyright 2009, Flavio Tordini <flavio.tordini@gmail.com>
   5
   6 Minitube is free software: you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation, either version 3 of the License, or
   9 (at your option) any later version.
  10
  11 Minitube is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with Minitube.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 $END_LICENSE */
  20
  21 #include "video.h"
  22 #include "networkaccess.h"
  23 #include <QtNetwork>
  24 #include "videodefinition.h"
  25 #include "jsfunctions.h"
  26
  27 namespace The {
  28 NetworkAccess* http();
  29 }
  30
  31 Video::Video() : m_duration(0),
  32     m_viewCount(-1),
  33     definitionCode(0),
  34     elIndex(0),
  35     ageGate(false),
  36     m_license(LicenseYouTube),
  37     loadingStreamUrl(false),
  38     loadingThumbnail(false)
  39 { }
  40
  41 Video* Video::clone() {
  42     Video* cloneVideo = new Video();
  43     cloneVideo->m_title = m_title;
  44     cloneVideo->m_description = m_description;
  45     cloneVideo->m_author = m_author;
  46     cloneVideo->m_userId = m_userId;
  47     cloneVideo->m_webpage = m_webpage;
  48     cloneVideo->m_streamUrl = m_streamUrl;
  49     cloneVideo->m_thumbnail = m_thumbnail;
  50     cloneVideo->m_thumbnailUrl = m_thumbnailUrl;
  51     cloneVideo->m_mediumThumbnailUrl = m_mediumThumbnailUrl;
  52     cloneVideo->m_duration = m_duration;
  53     cloneVideo->m_published = m_published;
  54     cloneVideo->m_viewCount = m_viewCount;
  55     cloneVideo->videoId = videoId;
  56     cloneVideo->videoToken = videoToken;
  57     cloneVideo->definitionCode = definitionCode;
  58     return cloneVideo;
  59 }
  60
  61 void Video::setWebpage(QUrl webpage) {
  62     m_webpage = webpage;
  63
  64     // Get Video ID
  65     // youtube-dl line 428
  66     // QRegExp re("^((?:http://)?(?:\\w+\\.)?youtube\\.com/(?:(?:v/)|(?:(?:watch(?:\\.php)?)?\\?(?:.+&)?v=)))?([0-9A-Za-z_-]+)(?(1).+)?$");
  67     QRegExp re("^https?://www\\.youtube\\.com/watch\\?v=([0-9A-Za-z_-]+).*");
  68     bool match = re.exactMatch(m_webpage.toString());
  69     if (!match || re.numCaptures() < 1) {
  70         qWarning() << QString("Cannot get video id for %1").arg(m_webpage.toString());
  71         // emit errorStreamUrl(QString("Cannot get video id for %1").arg(m_webpage.toString()));
  72         // loadingStreamUrl = false;
  73         return;
  74     }
  75     videoId = re.cap(1);
  76 }
  77
  78 void Video::loadThumbnail() {
  79     if (m_thumbnailUrl.isEmpty() || loadingThumbnail) return;
  80     loadingThumbnail = true;
  81     QObject *reply = The::http()->get(m_thumbnailUrl);
  82     connect(reply, SIGNAL(data(QByteArray)), SLOT(setThumbnail(QByteArray)));
  83 }
  84
  85 void Video::setThumbnail(QByteArray bytes) {
  86     loadingThumbnail = false;
  87     m_thumbnail.loadFromData(bytes);
  88     if (m_thumbnail.width() > 160)
  89         m_thumbnail = m_thumbnail.scaledToWidth(160, Qt::SmoothTransformation);
  90     emit gotThumbnail();
  91 }
  92
  93 void Video::loadMediumThumbnail() {
  94     if (m_mediumThumbnailUrl.isEmpty()) return;
  95     QObject *reply = The::http()->get(m_mediumThumbnailUrl);
  96     connect(reply, SIGNAL(data(QByteArray)), SIGNAL(gotMediumThumbnail(QByteArray)));
  97 }
  98
  99 void Video::loadStreamUrl() {
 100     if (loadingStreamUrl) {
 101         qDebug() << "Already loading stream URL for" << this->title();
 102         return;
 103     }
 104     loadingStreamUrl = true;
 105     elIndex = 0;
 106     ageGate = false;
 107
 108     getVideoInfo();
 109 }
 110
 111 void  Video::getVideoInfo() {
 112     static const QStringList elTypes = QStringList() << "&el=embedded" << "&el=detailpage" << "&el=vevo" << "";
 113
 114     QUrl videoInfoUrl;
 115
 116     if (elIndex == elTypes.size()) {
 117         // qDebug() << "Trying special embedded el param";
 118         videoInfoUrl = QUrl("http://www.youtube.com/get_video_info");
 119         videoInfoUrl.addQueryItem("video_id", videoId);
 120         videoInfoUrl.addQueryItem("el", "embedded");
 121         videoInfoUrl.addQueryItem("gl", "US");
 122         videoInfoUrl.addQueryItem("hl", "en");
 123         videoInfoUrl.addQueryItem("eurl", "https://youtube.googleapis.com/v/" + videoId);
 124         videoInfoUrl.addQueryItem("asv", "3");
 125         videoInfoUrl.addQueryItem("sts", "1588");
 126     } else if (elIndex > elTypes.size() - 1) {
 127         qWarning() << "Cannot get video info";
 128         loadingStreamUrl = false;
 129         emit errorStreamUrl("Cannot get video info");
 130         return;
 131     } else {
 132         // qDebug() << "Trying el param:" << elTypes.at(elIndex) << elIndex;
 133         videoInfoUrl = QUrl(QString(
 134                                 "http://www.youtube.com/get_video_info?video_id=%1%2&ps=default&eurl=&gl=US&hl=en"
 135                                 ).arg(videoId, elTypes.at(elIndex)));
 136     }
 137
 138     QObject *reply = The::http()->get(videoInfoUrl);
 139     connect(reply, SIGNAL(data(QByteArray)), SLOT(gotVideoInfo(QByteArray)));
 140     connect(reply, SIGNAL(error(QNetworkReply*)), SLOT(errorVideoInfo(QNetworkReply*)));
 141
 142     // see you in gotVideoInfo...
 143 }
 144
 145 void  Video::gotVideoInfo(QByteArray data) {
 146     QString videoInfo = QString::fromUtf8(data);
 147     // qDebug() << "videoInfo" << videoInfo;
 148
 149     // get video token
 150     QRegExp re = QRegExp("^.*&token=([^&]+).*$");
 151     bool match = re.exactMatch(videoInfo);
 152     // handle regexp failure
 153     if (!match || re.numCaptures() < 1) {
 154         // qDebug() << "Cannot get token. Trying next el param";
 155         // Don't panic! We're gonna try another magic "el" param
 156         elIndex++;
 157         getVideoInfo();
 158         return;
 159     }
 160
 161     QString videoToken = re.cap(1);
 162     while (videoToken.contains('%'))
 163         videoToken = QByteArray::fromPercentEncoding(videoToken.toAscii());
 164     // qDebug() << "videoToken" << videoToken;
 165     this->videoToken = videoToken;
 166
 167     // get fmt_url_map
 168     re = QRegExp("^.*&url_encoded_fmt_stream_map=([^&]+).*$");
 169     match = re.exactMatch(videoInfo);
 170     // handle regexp failure
 171     if (!match || re.numCaptures() < 1) {
 172         // qDebug() << "Cannot get urlMap. Trying next el param";
 173         // Don't panic! We're gonna try another magic "el" param
 174         elIndex++;
 175         getVideoInfo();
 176         return;
 177     }
 178
 179     // qDebug() << "Got token and urlMap" << elIndex;
 180
 181     QString fmtUrlMap = re.cap(1);
 182     fmtUrlMap = QByteArray::fromPercentEncoding(fmtUrlMap.toUtf8());
 183     parseFmtUrlMap(fmtUrlMap);
 184 }
 185
 186 void Video::parseFmtUrlMap(const QString &fmtUrlMap, bool fromWebPage) {
 187     QSettings settings;
 188     QString definitionName = settings.value("definition", "360p").toString();
 189     int definitionCode = VideoDefinition::getDefinitionCode(definitionName);
 190
 191     // qDebug() << "fmtUrlMap" << fmtUrlMap;
 192     QStringList formatUrls = fmtUrlMap.split(',', QString::SkipEmptyParts);
 193     QHash<int, QString> urlMap;
 194     foreach(QString formatUrl, formatUrls) {
 195         // qDebug() << "formatUrl" << formatUrl;
 196         QStringList urlParams = formatUrl.split('&', QString::SkipEmptyParts);
 197         // qDebug() << "urlParams" << urlParams;
 198
 199         int format = -1;
 200         QString url;
 201         QString sig;
 202         foreach(QString urlParam, urlParams) {
 203             // qWarning() << urlParam;
 204             if (urlParam.startsWith("itag=")) {
 205                 int separator = urlParam.indexOf("=");
 206                 format = urlParam.mid(separator + 1).toInt();
 207             } else if (urlParam.startsWith("url=")) {
 208                 int separator = urlParam.indexOf("=");
 209                 url = urlParam.mid(separator + 1);
 210                 url = QByteArray::fromPercentEncoding(url.toUtf8());
 211             } else if (urlParam.startsWith("sig=")) {
 212                 int separator = urlParam.indexOf("=");
 213                 sig = urlParam.mid(separator + 1);
 214                 sig = QByteArray::fromPercentEncoding(sig.toUtf8());
 215             } else if (urlParam.startsWith("s=")) {
 216                 if (fromWebPage || ageGate) {
 217                     int separator = urlParam.indexOf("=");
 218                     sig = urlParam.mid(separator + 1);
 219                     sig = QByteArray::fromPercentEncoding(sig.toUtf8());
 220                     if (ageGate)
 221                         sig = JsFunctions::instance()->decryptAgeSignature(sig);
 222                     else {
 223                         sig = decryptSignature(sig);
 224                         if (sig.isEmpty())
 225                             sig = JsFunctions::instance()->decryptSignature(sig);
 226                     }
 227                 } else {
 228                     // qDebug() << "Loading webpage";
 229                     QUrl url("http://www.youtube.com/watch");
 230                     url.addQueryItem("v", videoId);
 231                     url.addQueryItem("gl", "US");
 232                     url.addQueryItem("hl", "en");
 233                     url.addQueryItem("has_verified", "1");
 234                     QObject *reply = The::http()->get(url);
 235                     connect(reply, SIGNAL(data(QByteArray)), SLOT(scrapeWebPage(QByteArray)));
 236                     connect(reply, SIGNAL(error(QNetworkReply*)), SLOT(errorVideoInfo(QNetworkReply*)));
 237                     // see you in scrapWebPage(QByteArray)
 238                     return;
 239                 }
 240             }
 241         }
 242         if (format == -1 || url.isNull()) continue;
 243
 244         url += "&signature=" + sig;
 245
 246         if (!url.contains("ratebypass"))
 247             url += "&ratebypass=yes";
 248
 249         // qWarning() << url;
 250
 251         if (format == definitionCode) {
 252             qDebug() << "Found format" << definitionCode;
 253             QUrl videoUrl = QUrl::fromEncoded(url.toUtf8(), QUrl::StrictMode);
 254             m_streamUrl = videoUrl;
 255             this->definitionCode = definitionCode;
 256             emit gotStreamUrl(videoUrl);
 257             loadingStreamUrl = false;
 258             return;
 259         }
 260
 261         urlMap.insert(format, url);
 262     }
 263
 264     QList<int> definitionCodes = VideoDefinition::getDefinitionCodes();
 265     int currentIndex = definitionCodes.indexOf(definitionCode);
 266     int previousIndex = 0;
 267     while (currentIndex >= 0) {
 268         previousIndex = currentIndex - 1;
 269         if (previousIndex < 0) previousIndex = 0;
 270         int definitionCode = definitionCodes.at(previousIndex);
 271         if (urlMap.contains(definitionCode)) {
 272             qDebug() << "Found format" << definitionCode;
 273             QString url = urlMap.value(definitionCode);
 274             QUrl videoUrl = QUrl::fromEncoded(url.toUtf8(), QUrl::StrictMode);
 275             m_streamUrl = videoUrl;
 276             this->definitionCode = definitionCode;
 277             emit gotStreamUrl(videoUrl);
 278             loadingStreamUrl = false;
 279             return;
 280         }
 281         currentIndex--;
 282     }
 283
 284     emit errorStreamUrl(tr("Cannot get video stream for %1").arg(m_webpage.toString()));
 285 }
 286
 287 void Video::foundVideoUrl(QString videoToken, int definitionCode) {
 288     // qDebug() << "foundVideoUrl" << videoToken << definitionCode;
 289
 290     QUrl videoUrl = QUrl(QString(
 291                              "http://www.youtube.com/get_video?video_id=%1&t=%2&eurl=&el=&ps=&asv=&fmt=%3"
 292                              ).arg(videoId, videoToken, QString::number(definitionCode)));
 293
 294     m_streamUrl = videoUrl;
 295     loadingStreamUrl = false;
 296     emit gotStreamUrl(videoUrl);
 297 }
 298
 299 void Video::errorVideoInfo(QNetworkReply *reply) {
 300     loadingStreamUrl = false;
 301     emit errorStreamUrl(tr("Network error: %1 for %2").arg(reply->errorString(), reply->url().toString()));
 302 }
 303
 304 void Video::scrapeWebPage(QByteArray data) {
 305     QString html = QString::fromUtf8(data);
 306     // qWarning() << html;
 307
 308     if (html.contains("player-age-gate-content\"")) {
 309         // qDebug() << "Found ageGate";
 310         ageGate = true;
 311         elIndex = 4;
 312         getVideoInfo();
 313         return;
 314     }
 315
 316     QRegExp re(".*\"url_encoded_fmt_stream_map\":\\s+\"([^\"]+)\".*");
 317     bool match = re.exactMatch(html);
 318     // on regexp failure, stop and report error
 319     if (!match || re.numCaptures() < 1) {
 320         qWarning() << "Error parsing video page";
 321         // emit errorStreamUrl("Error parsing video page");
 322         // loadingStreamUrl = false;
 323         elIndex++;
 324         getVideoInfo();
 325         return;
 326     }
 327     fmtUrlMap = re.cap(1);
 328     fmtUrlMap.replace("\\u0026", "&");
 329     // parseFmtUrlMap(fmtUrlMap, true);
 330
 331     QRegExp jsPlayerRe("\"assets\":.+\"js\":\\s*\"([^\"]+)\"");
 332     if (jsPlayerRe.indexIn(html) != -1) {
 333         QString jsPlayerUrl = jsPlayerRe.cap(1);
 334         jsPlayerUrl.remove('\\');
 335         jsPlayerUrl = "http:" + jsPlayerUrl;
 336         qWarning() << "jsPlayerUrl" << jsPlayerUrl;
 337         /*
 338         QRegExp jsPlayerIdRe("-(.+)\\.js");
 339         jsPlayerIdRe.indexIn(jsPlayerUrl);
 340         QString jsPlayerId = jsPlayerRe.cap(1);
 341         */
 342         QObject *reply = The::http()->get(jsPlayerUrl);
 343         connect(reply, SIGNAL(data(QByteArray)), SLOT(parseJsPlayer(QByteArray)));
 344         connect(reply, SIGNAL(error(QNetworkReply*)), SLOT(errorVideoInfo(QNetworkReply*)));
 345     }
 346 }
 347
 348 void Video::gotHeadHeaders(QNetworkReply* reply) {
 349     int statusCode = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
 350     // qDebug() << "gotHeaders" << statusCode;
 351     if (statusCode == 200) {
 352         foundVideoUrl(videoToken, definitionCode);
 353     } else {
 354
 355         // try next (lower quality) definition
 356         /*
 357         QStringList definitionNames = VideoDefinition::getDefinitionNames();
 358         int currentIndex = definitionNames.indexOf(currentDefinition);
 359         int previousIndex = 0;
 360         if (currentIndex > 0) {
 361             previousIndex = currentIndex - 1;
 362         }
 363         if (previousIndex > 0) {
 364             QString nextDefinitionName = definitionNames.at(previousIndex);
 365             findVideoUrl(nextDefinitionName);
 366         } else {
 367             foundVideoUrl(videoToken, 18);
 368         }*/
 369
 370
 371         QList<int> definitionCodes = VideoDefinition::getDefinitionCodes();
 372         int currentIndex = definitionCodes.indexOf(definitionCode);
 373         int previousIndex = 0;
 374         if (currentIndex > 0) {
 375             previousIndex = currentIndex - 1;
 376             int definitionCode = definitionCodes.at(previousIndex);
 377             if (definitionCode == 18) {
 378                 // This is assumed always available
 379                 foundVideoUrl(videoToken, 18);
 380             } else {
 381                 findVideoUrl(definitionCode);
 382             }
 383
 384         } else {
 385             foundVideoUrl(videoToken, 18);
 386         }
 387
 388     }
 389 }
 390
 391 void Video::parseJsPlayer(QByteArray bytes) {
 392     QString js = QString::fromUtf8(bytes);
 393     QRegExp funcNameRe("signature=([a-zA-Z0-9]+)");
 394     if (funcNameRe.indexIn(js) == -1) {
 395         qWarning() << "Cannot capture signature function name";
 396     } else {
 397         sigFuncName = funcNameRe.cap(1);
 398         captureFunction(sigFuncName, js);
 399         // qDebug() << sigFunctions;
 400     }
 401     parseFmtUrlMap(fmtUrlMap, true);
 402 }
 403
 404 void Video::captureFunction(const QString &name, const QString &js) {
 405     QRegExp funcRe("function\\s+" + name + "\\s*\\([a-zA-Z0-9,\\s]*\\)\\s*\\{[^\\}]+\\}");
 406     if (funcRe.indexIn(js) == -1) {
 407         qWarning() << "Cannot capture function" << name;
 408         return;
 409     }
 410     QString func = funcRe.cap(0);
 411     sigFunctions.insert(name, func);
 412
 413     // capture inner functions
 414     QRegExp invokedFuncRe("[\\s=;\\(]([a-zA-Z0-9]+)\\s*\\([a-zA-Z0-9, ]+\\)");
 415     int pos = name.length() + 9;
 416     while ((pos = invokedFuncRe.indexIn(func, pos)) != -1) {
 417         QString funcName = invokedFuncRe.cap(1);
 418         if (!sigFunctions.contains(funcName))
 419             captureFunction(funcName, js);
 420         pos += invokedFuncRe.matchedLength();
 421     }
 422 }
 423
 424 QString Video::decryptSignature(const QString &s) {
 425     if (sigFuncName.isEmpty()) return QString();
 426     QScriptEngine engine;
 427     foreach (QString f, sigFunctions.values()) {
 428         QScriptValue value = engine.evaluate(f);
 429         if (value.isError())
 430             qWarning() << "Error in" << f << value.toString();
 431     }
 432     QString js = sigFuncName + "('" + s + "');";
 433     QScriptValue value = engine.evaluate(js);
 434     if (value.isUndefined()) {
 435         qWarning() << "Undefined result for" << js;
 436         return QString();
 437     }
 438     if (value.isError()) {
 439         qWarning() << "Error in" << js << value.toString();
 440         return QString();
 441     }
 442     return value.toString();
 443 }
 444
 445 void Video::findVideoUrl(int definitionCode) {
 446     this->definitionCode = definitionCode;
 447
 448     QUrl videoUrl = QUrl(QString(
 449                              "http://www.youtube.com/get_video?video_id=%1&t=%2&eurl=&el=&ps=&asv=&fmt=%3"
 450                              ).arg(videoId, videoToken, QString::number(definitionCode)));
 451
 452     QObject *reply = The::http()->head(videoUrl);
 453     connect(reply, SIGNAL(finished(QNetworkReply*)), SLOT(gotHeadHeaders(QNetworkReply*)));
 454     // connect(reply, SIGNAL(error(QNetworkReply*)), SLOT(errorVideoInfo(QNetworkReply*)));
 455
 456     // see you in gotHeadHeaders()
 457 }
 458
 459 QString Video::formattedDuration() const {
 460     QString format = m_duration > 3600 ? "h:mm:ss" : "m:ss";
 461     return QTime().addSecs(m_duration).toString(format);
 462 }