metainfo.cpp Example File

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  #include "bencodeparser.h"
  #include "metainfo.h"

  #include <QDateTime>
  #include <QMetaType>
  #include <QString>

  MetaInfo::MetaInfo()
  {
      clear();
  }

  void MetaInfo::clear()
  {
      errString = "Unknown error";
      content.clear();
      infoData.clear();
      metaInfoMultiFiles.clear();
      metaInfoAnnounce.clear();
      metaInfoAnnounceList.clear();
      metaInfoCreationDate = QDateTime();
      metaInfoComment.clear();
      metaInfoCreatedBy.clear();
      metaInfoName.clear();
      metaInfoPieceLength = 0;
      metaInfoSha1Sums.clear();
  }

  bool MetaInfo::parse(const QByteArray &data)
  {
      clear();
      content = data;

      BencodeParser parser;
      if (!parser.parse(content)) {
          errString = parser.errorString();
          return false;
      }

      infoData = parser.infoSection();

      QMap<QByteArray, QVariant> dict = parser.dictionary();
      if (!dict.contains("info"))
          return false;

      QMap<QByteArray, QVariant> info = qvariant_cast<Dictionary>(dict.value("info"));

      if (info.contains("files")) {
          metaInfoFileForm = MultiFileForm;

          QList<QVariant> files = info.value("files").toList();

          for (int i = 0; i < files.size(); ++i) {
              QMap<QByteArray, QVariant> file = qvariant_cast<Dictionary>(files.at(i));
              QList<QVariant> pathElements = file.value("path").toList();
              QByteArray path;
              foreach (QVariant p, pathElements) {
                  if (!path.isEmpty())
                      path += '/';
                  path += p.toByteArray();
              }

              MetaInfoMultiFile multiFile;
              multiFile.length = file.value("length").toLongLong();
              multiFile.path = QString::fromUtf8(path);
              multiFile.md5sum = file.value("md5sum").toByteArray();
              metaInfoMultiFiles << multiFile;
          }

          metaInfoName = QString::fromUtf8(info.value("name").toByteArray());
          metaInfoPieceLength = info.value("piece length").toInt();
          QByteArray pieces = info.value("pieces").toByteArray();
          for (int i = 0; i < pieces.size(); i += 20)
              metaInfoSha1Sums << pieces.mid(i, 20);
      } else if (info.contains("length")) {
          metaInfoFileForm = SingleFileForm;
          metaInfoSingleFile.length = info.value("length").toLongLong();
          metaInfoSingleFile.md5sum = info.value("md5sum").toByteArray();
          metaInfoSingleFile.name = QString::fromUtf8(info.value("name").toByteArray());
          metaInfoSingleFile.pieceLength = info.value("piece length").toInt();

          QByteArray pieces = info.value("pieces").toByteArray();
          for (int i = 0; i < pieces.size(); i += 20)
              metaInfoSingleFile.sha1Sums << pieces.mid(i, 20);
      }

      metaInfoAnnounce = QString::fromUtf8(dict.value("announce").toByteArray());

      if (dict.contains("announce-list")) {
          // ### unimplemented
      }

      if (dict.contains("creation date"))
          metaInfoCreationDate.setTime_t(dict.value("creation date").toInt());
      if (dict.contains("comment"))
          metaInfoComment = QString::fromUtf8(dict.value("comment").toByteArray());
      if (dict.contains("created by"))
          metaInfoCreatedBy = QString::fromUtf8(dict.value("created by").toByteArray());

      return true;
  }

  QByteArray MetaInfo::infoValue() const
  {
      return infoData;
  }

  QString MetaInfo::errorString() const
  {
      return errString;
  }

  MetaInfo::FileForm MetaInfo::fileForm() const
  {
      return metaInfoFileForm;
  }

  QString MetaInfo::announceUrl() const
  {
      return metaInfoAnnounce;
  }

  QStringList MetaInfo::announceList() const
  {
      return metaInfoAnnounceList;
  }

  QDateTime MetaInfo::creationDate() const
  {
      return metaInfoCreationDate;
  }

  QString MetaInfo::comment() const
  {
      return metaInfoComment;
  }

  QString MetaInfo::createdBy() const
  {
      return metaInfoCreatedBy;
  }

  MetaInfoSingleFile MetaInfo::singleFile() const
  {
      return metaInfoSingleFile;
  }

  QList<MetaInfoMultiFile> MetaInfo::multiFiles() const
  {
      return metaInfoMultiFiles;
  }

  QString MetaInfo::name() const
  {
      return metaInfoName;
  }

  int MetaInfo::pieceLength() const
  {
      return metaInfoPieceLength;
  }

  QList<QByteArray> MetaInfo::sha1Sums() const
  {
      return metaInfoSha1Sums;
  }

  qint64 MetaInfo::totalSize() const
  {
      if (fileForm() == SingleFileForm)
          return singleFile().length;

      qint64 size = 0;
      foreach (MetaInfoMultiFile file, multiFiles())
          size += file.length;
      return size;
  }