vcs.maemo.org Git - qtrapids/blob - src/plugins/searchplugin/DownloadManager.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2009 by Lassi Väätämöinen   *
   3  *   lassi.vaatamoinen@ixonos.com   *
   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.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20
  21 #include <QDebug>
  22
  23 #include "DownloadManager.h"
  24
  25
  26 DownloadManager::DownloadManager(QObject *parent) :
  27         QObject(parent) // Superclass construct
  28 {
  29 }
  30
  31 DownloadManager::DownloadManager(QUrl url, QString outfile, QObject *parent) :
  32         QObject(parent), // Superclass construct
  33         url_(url),
  34         filepath_(outfile),
  35         file_(QString(outfile))
  36 {
  37         file_.open(QIODevice::WriteOnly);
  38 }
  39
  40
  41 DownloadManager::~DownloadManager()
  42 {
  43         file_.close();
  44         delete reply_; reply_ = NULL;
  45 }
  46
  47
  48 void DownloadManager::start()
  49 {
  50         reply_ = manager_.get(QNetworkRequest(url_));
  51
  52         connect(reply_, SIGNAL(readyRead()), this, SLOT(on_readyRead()));
  53         connect(reply_, SIGNAL(downloadProgress (qint64 , qint64)), SLOT(on_downloadProgress(qint64, qint64)));
  54         connect(reply_, SIGNAL(finished()), this, SLOT(on_replyFinished()));
  55 }
  56
  57
  58 void DownloadManager::on_readyRead()
  59 {
  60         //qDebug() << "on_readyRead()";
  61         if(!WriteToFile()) {
  62                 qWarning() << "DownloadManager::on_readyRead(): Writing to file: "
  63                         << filepath_ << " failed.";
  64         }
  65 }
  66
  67 void DownloadManager::on_downloadProgress(qint64 bytesReceived, qint64 bytesTotal)
  68 {
  69         static double last = 0;
  70
  71         double prog = static_cast<double>(bytesReceived) / static_cast<double>(bytesTotal);
  72         if ((prog-last) >= 0.01) {
  73                 last = prog;
  74                 emit progress(static_cast<int>(100*prog));
  75         } else if (bytesReceived == bytesTotal) {
  76                 emit progress(100);
  77         }
  78
  79 }
  80
  81 void DownloadManager::on_replyFinished()
  82 {
  83         WriteToFile();
  84         file_.close();
  85         emit finished(filepath_);
  86 }
  87
  88
  89 bool DownloadManager::WriteToFile()
  90 {
  91         QByteArray readData = reply_->readAll();
  92
  93         if (readData.isEmpty()) {
  94                 qDebug() << "on_replyFinished(): No data available for reading";
  95         } else {
  96                 // If writing failed, see error message.
  97                 if (file_.write(readData) == -1) {
  98                         qWarning() << file_.error();
  99                         return false;
 100                 }
 101         }
 102         return true;
 103 }