src/PlaylistImporter.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // LameXP - Audio Encoder Front-End
   3 // Copyright (C) 2004-2013 LoRd_MuldeR <MuldeR2@GMX.de>
   4 //
   5 // This program is free software; you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation; either version 2 of the License, or
   8 // (at your option) any later version, but always including the *additional*
   9 // restrictions defined in the "License.txt" file.
  10 //
  11 // This program 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 along
  17 // with this program; if not, write to the Free Software Foundation, Inc.,
  18 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 //
  20 // http://www.gnu.org/licenses/gpl-2.0.txt
  21 ///////////////////////////////////////////////////////////////////////////////
  22
  23 #include "PlaylistImporter.h"
  24
  25 #include "Global.h"
  26
  27 #include <QString>
  28 #include <QStringList>
  29 #include <QDir>
  30 #include <QFileInfo>
  31 #include <QProcess>
  32 #include <QDate>
  33 #include <QTime>
  34 #include <QDebug>
  35 #include <QTextCodec>
  36
  37 //Un-escape XML characters
  38 static const struct
  39 {
  40         char *escape;
  41         char *output;
  42 }
  43 g_xmlEscapeSequence[] =
  44 {
  45         {"&amp;", "&"},
  46         {"&lt;", "<"},
  47         {"&gt;", ">"},
  48         {"&apos;", "'"},
  49         {"&nbsp;", " "},
  50         {"&quot;", "\""},
  51         {NULL, NULL}
  52 };
  53
  54 const char *PlaylistImporter::supportedExtensions = "*.m3u *.m3u8 *.pls *.asx *.wpl";
  55
  56
  57 ////////////////////////////////////////////////////////////
  58 // Public Functions
  59 ////////////////////////////////////////////////////////////
  60
  61 bool PlaylistImporter::importPlaylist(QStringList &fileList, const QString &playlistFile)
  62 {
  63         QFileInfo file(playlistFile);
  64         QDir baseDir(file.canonicalPath());
  65
  66         QDir rootDir(baseDir);
  67         while(rootDir.cdUp());
  68
  69         //Detect playlist type
  70         playlist_t playlistType = isPlaylist(file.canonicalFilePath());
  71
  72         //Exit if not a playlist
  73         if(playlistType == notPlaylist)
  74         {
  75                 return false;
  76         }
  77
  78         QFile data(playlistFile);
  79
  80         //Open file for reading
  81         if(!data.open(QIODevice::ReadOnly))
  82         {
  83                 return false;
  84         }
  85
  86         //Skip very large files (parsing could take very long)
  87         if((file.size() < 3) || (file.size() > 524288))
  88         {
  89                 qWarning("File is very big. Probably not a Playlist. Rejecting...");
  90                 return false;
  91         }
  92
  93         //Parse playlist depending on type
  94         switch(playlistType)
  95         {
  96         case m3uPlaylist:
  97                 return parsePlaylist_m3u(data, fileList, baseDir, rootDir);
  98                 break;
  99         case plsPlaylist:
 100                 return parsePlaylist_pls(data, fileList, baseDir, rootDir);
 101                 break;
 102         case wplPlaylist:
 103                 return parsePlaylist_wpl(data, fileList, baseDir, rootDir);
 104                 break;
 105         default:
 106                 return false;
 107                 break;
 108         }
 109 }
 110
 111 ////////////////////////////////////////////////////////////
 112 // Private Functions
 113 ////////////////////////////////////////////////////////////
 114
 115 PlaylistImporter::playlist_t PlaylistImporter::isPlaylist(const QString &fileName)
 116 {
 117         QFileInfo file (fileName);
 118
 119         if(file.suffix().compare("m3u", Qt::CaseInsensitive) == 0 || file.suffix().compare("m3u8", Qt::CaseInsensitive) == 0)
 120         {
 121                 return m3uPlaylist;
 122         }
 123         else if(file.suffix().compare("pls", Qt::CaseInsensitive) == 0)
 124         {
 125                 return  plsPlaylist;
 126         }
 127         else if(file.suffix().compare("asx", Qt::CaseInsensitive) == 0 || file.suffix().compare("wpl", Qt::CaseInsensitive) == 0)
 128         {
 129                 return  wplPlaylist;
 130         }
 131         else
 132         {
 133                 return notPlaylist;
 134         }
 135 }
 136
 137 bool PlaylistImporter::parsePlaylist_m3u(QFile &data, QStringList &fileList, const QDir &baseDir, const QDir &rootDir)
 138 {
 139         const QTextCodec *codec = QTextCodec::codecForName("System");
 140         const bool preferUTF8 = data.fileName().endsWith(".m3u8", Qt::CaseInsensitive);
 141         bool foundAtLeastOneFile = false;
 142
 143         data.reset();
 144
 145         while(!data.atEnd())
 146         {
 147                 QString filePath[3];
 148                 QByteArray line = data.readLine();
 149
 150                 if(preferUTF8)
 151                 {
 152                         filePath[0] = QString(QDir::fromNativeSeparators(QString::fromUtf8(line.constData(), line.size()).trimmed()));
 153                         filePath[1] = QString(QDir::fromNativeSeparators(codec->toUnicode(line.constData(), line.size()).trimmed()));
 154                         filePath[2] = QString(QDir::fromNativeSeparators(QString::fromLatin1(line.constData(), line.size()).trimmed()));
 155                 }
 156                 else
 157                 {
 158                         filePath[0] = QString(QDir::fromNativeSeparators(codec->toUnicode(line.constData(), line.size()).trimmed()));
 159                         filePath[1] = QString(QDir::fromNativeSeparators(QString::fromLatin1(line.constData(), line.size()).trimmed()));
 160                         filePath[2] = QString(QDir::fromNativeSeparators(QString::fromUtf8(line.constData(), line.size()).trimmed()));
 161                 }
 162
 163                 for(size_t i = 0; i < 3; i++)
 164                 {
 165                         if(!(filePath[i].isEmpty() || filePath[i].startsWith("#") || filePath[i].contains(QChar(QChar::ReplacementCharacter))))
 166                         {
 167                                 QFileInfo filename(filePath[i]);
 168                                 filename.setCaching(false);
 169                                 fixFilePath(filename, baseDir, rootDir);
 170
 171                                 if(filename.exists() && filename.isFile())
 172                                 {
 173                                         qDebug("Found: \"%s\"", QUTF8(filePath[i]));
 174                                         if(isPlaylist(filename.canonicalFilePath()) == notPlaylist)
 175                                         {
 176                                                 fileList << filename.canonicalFilePath();
 177                                         }
 178                                         foundAtLeastOneFile = true;
 179                                         break;
 180                                 }
 181                         }
 182                 }
 183         }
 184
 185         //If we did not find any files yet, try UTF-16 now
 186         if(!foundAtLeastOneFile)
 187         {
 188                 const char* codecs[2] = {"UTF-16LE", "UTF-16BE"};
 189
 190                 for(size_t i = 0; i < 2; i++)
 191                 {
 192                         QTextStream stream(&data);
 193                         stream.setAutoDetectUnicode(false);
 194                         stream.setCodec(codecs[i]);
 195                         stream.seek(0i64);
 196
 197                         while(!stream.atEnd())
 198                         {
 199                                 QString filePath = stream.readLine().trimmed();
 200
 201                                 if(!(filePath.isEmpty() || filePath.startsWith("#") || filePath.contains(QChar(QChar::ReplacementCharacter))))
 202                                 {
 203                                         QFileInfo filename(filePath);
 204                                         filename.setCaching(false);
 205                                         fixFilePath(filename, baseDir, rootDir);
 206
 207                                         if(filename.exists() && filename.isFile())
 208                                         {
 209                                                 if(isPlaylist(filename.canonicalFilePath()) == notPlaylist)
 210                                                 {
 211                                                         fileList << filename.canonicalFilePath();
 212                                                 }
 213                                                 foundAtLeastOneFile = true;
 214                                         }
 215                                 }
 216                         }
 217
 218                         if(foundAtLeastOneFile) break;
 219                 }
 220         }
 221
 222         return foundAtLeastOneFile;
 223 }
 224
 225 bool PlaylistImporter::parsePlaylist_pls(QFile &data, QStringList &fileList, const QDir &baseDir, const QDir &rootDir)
 226 {
 227         QRegExp plsEntry("File(\\d+)=(.+)", Qt::CaseInsensitive);
 228         const QTextCodec *codec = QTextCodec::codecForName("System");
 229         bool foundAtLeastOneFile = false;
 230
 231         data.reset();
 232
 233         while(!data.atEnd())
 234         {
 235                 QString filePath[3];
 236                 QByteArray line = data.readLine();
 237
 238                 filePath[0] = QString(QDir::fromNativeSeparators(codec->toUnicode(line.constData(), line.size()).trimmed()));
 239                 filePath[1] = QString(QDir::fromNativeSeparators(QString::fromLatin1(line.constData(), line.size()).trimmed()));
 240                 filePath[2] = QString(QDir::fromNativeSeparators(QString::fromUtf8(line.constData(), line.size()).trimmed()));
 241
 242                 for(size_t i = 0; i < 3; i++)
 243                 {
 244                         if(!filePath[i].contains(QChar(QChar::ReplacementCharacter)))
 245                         {
 246                                 if(plsEntry.indexIn(filePath[i]) >= 0)
 247                                 {
 248                                         QFileInfo filename(QDir::fromNativeSeparators(plsEntry.cap(2)).trimmed());
 249                                         filename.setCaching(false);
 250                                         fixFilePath(filename, baseDir, rootDir);
 251
 252                                         if(filename.exists() && filename.isFile())
 253                                         {
 254                                                 if(isPlaylist(filename.canonicalFilePath()) == notPlaylist)
 255                                                 {
 256                                                         fileList << filename.canonicalFilePath();
 257                                                 }
 258                                                 foundAtLeastOneFile = true;
 259                                                 break;
 260                                         }
 261                                 }
 262                         }
 263                 }
 264         }
 265
 266         //If we did not find any files yet, try UTF-16 now
 267         if(!foundAtLeastOneFile)
 268         {
 269                 const char* codecs[2] = {"UTF-16LE", "UTF-16BE"};
 270
 271                 for(size_t i = 0; i < 2; i++)
 272                 {
 273                         QTextStream stream(&data);
 274                         stream.setAutoDetectUnicode(false);
 275                         stream.setCodec(codecs[i]);
 276                         stream.seek(0i64);
 277
 278                         while(!stream.atEnd())
 279                         {
 280                                 QString filePath = stream.readLine().trimmed();
 281
 282                                 if(!filePath.contains(QChar(QChar::ReplacementCharacter)))
 283                                 {
 284                                         if(plsEntry.indexIn(filePath) >= 0)
 285                                         {
 286                                                 QFileInfo filename(QDir::fromNativeSeparators(plsEntry.cap(2)).trimmed());
 287                                                 filename.setCaching(false);
 288                                                 fixFilePath(filename, baseDir, rootDir);
 289
 290                                                 if(filename.exists() && filename.isFile())
 291                                                 {
 292                                                         if(isPlaylist(filename.canonicalFilePath()) == notPlaylist)
 293                                                         {
 294                                                                 fileList << filename.canonicalFilePath();
 295                                                         }
 296                                                         foundAtLeastOneFile = true;
 297                                                 }
 298                                         }
 299                                 }
 300                         }
 301
 302                         if(foundAtLeastOneFile) break;
 303                 }
 304         }
 305
 306         return foundAtLeastOneFile;
 307 }
 308
 309 bool PlaylistImporter::parsePlaylist_wpl(QFile &data, QStringList &fileList, const QDir &baseDir, const QDir &rootDir)
 310 {
 311         bool foundAtLeastOneFile = false;
 312
 313         QRegExp skipData("<!--(.+)-->", Qt::CaseInsensitive);
 314         QRegExp wplEntry("<(media|ref)[^<>]*(src|href)=\"([^\"]+)\"[^<>]*>", Qt::CaseInsensitive);
 315
 316         skipData.setMinimal(true);
 317
 318         QByteArray buffer = data.readAll();
 319         QString line = QString::fromUtf8(buffer.constData(), buffer.size()).simplified();
 320         buffer.clear();
 321
 322         int index = 0;
 323
 324         while((index = skipData.indexIn(line)) >= 0)
 325         {
 326                 line.remove(index, skipData.matchedLength());
 327         }
 328
 329         int offset = 0;
 330
 331         while((offset = wplEntry.indexIn(line, offset) + 1) > 0)
 332         {
 333                 QFileInfo filename(QDir::fromNativeSeparators(unescapeXml(wplEntry.cap(3)).trimmed()));
 334                 filename.setCaching(false);
 335                 fixFilePath(filename, baseDir, rootDir);
 336
 337                 if(filename.exists() && filename.isFile())
 338                 {
 339                         if(isPlaylist(filename.canonicalFilePath()) == notPlaylist)
 340                         {
 341                                 fileList << filename.canonicalFilePath();
 342                                 foundAtLeastOneFile = true;
 343                         }
 344                 }
 345         }
 346
 347         return foundAtLeastOneFile;
 348 }
 349
 350 void PlaylistImporter::fixFilePath(QFileInfo &filename, const QDir &baseDir, const QDir &rootDir)
 351 {
 352         if(filename.filePath().startsWith("/"))
 353         {
 354                 while(filename.filePath().startsWith("/"))
 355                 {
 356                         filename.setFile(filename.filePath().mid(1));
 357                 }
 358                 filename.setFile(rootDir.filePath(filename.filePath()));
 359         }
 360
 361         if(!filename.isAbsolute())
 362         {
 363                 filename.setFile(baseDir.filePath(filename.filePath()));
 364         }
 365 }
 366
 367 QString &PlaylistImporter::unescapeXml(QString &str)
 368 {
 369         for(int i = 0; (g_xmlEscapeSequence[i].escape && g_xmlEscapeSequence[i].output); i++)
 370         {
 371                 str.replace(g_xmlEscapeSequence[i].escape, g_xmlEscapeSequence[i].output);
 372         }
 373
 374         return str;
 375 }