diff options
Diffstat (limited to 'examples/network/download/main.cpp')
| -rw-r--r-- | examples/network/download/main.cpp | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/examples/network/download/main.cpp b/examples/network/download/main.cpp new file mode 100644 index 0000000000..1b7e54ba11 --- /dev/null +++ b/examples/network/download/main.cpp @@ -0,0 +1,192 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QCoreApplication> +#include <QFile> +#include <QFileInfo> +#include <QList> +#include <QNetworkAccessManager> +#include <QNetworkRequest> +#include <QNetworkReply> +#include <QSslError> +#include <QStringList> +#include <QTimer> +#include <QUrl> + +#include <stdio.h> + +QT_BEGIN_NAMESPACE +class QSslError; +QT_END_NAMESPACE + +QT_USE_NAMESPACE + +class DownloadManager: public QObject +{ + Q_OBJECT + QNetworkAccessManager manager; + QList<QNetworkReply *> currentDownloads; + +public: + DownloadManager(); + void doDownload(const QUrl &url); + QString saveFileName(const QUrl &url); + bool saveToDisk(const QString &filename, QIODevice *data); + +public slots: + void execute(); + void downloadFinished(QNetworkReply *reply); + void sslErrors(const QList<QSslError> &errors); +}; + +DownloadManager::DownloadManager() +{ + connect(&manager, SIGNAL(finished(QNetworkReply*)), + SLOT(downloadFinished(QNetworkReply*))); +} + +void DownloadManager::doDownload(const QUrl &url) +{ + QNetworkRequest request(url); + QNetworkReply *reply = manager.get(request); + connect(reply, SIGNAL(sslErrors(QList<QSslError>)), SLOT(sslErrors(QList<QSslError>))); + + currentDownloads.append(reply); +} + +QString DownloadManager::saveFileName(const QUrl &url) +{ + QString path = url.path(); + QString basename = QFileInfo(path).fileName(); + + if (basename.isEmpty()) + basename = "download"; + + if (QFile::exists(basename)) { + // already exists, don't overwrite + int i = 0; + basename += '.'; + while (QFile::exists(basename + QString::number(i))) + ++i; + + basename += QString::number(i); + } + + return basename; +} + +bool DownloadManager::saveToDisk(const QString &filename, QIODevice *data) +{ + QFile file(filename); + if (!file.open(QIODevice::WriteOnly)) { + fprintf(stderr, "Could not open %s for writing: %s\n", + qPrintable(filename), + qPrintable(file.errorString())); + return false; + } + + file.write(data->readAll()); + file.close(); + + return true; +} + +void DownloadManager::execute() +{ + QStringList args = QCoreApplication::instance()->arguments(); + args.takeFirst(); // skip the first argument, which is the program's name + if (args.isEmpty()) { + printf("Qt Download example - downloads all URLs in parallel\n" + "Usage: download url1 [url2... urlN]\n" + "\n" + "Downloads the URLs passed in the command-line to the local directory\n" + "If the target file already exists, a .0, .1, .2, etc. is appended to\n" + "differentiate.\n"); + QCoreApplication::instance()->quit(); + return; + } + + foreach (QString arg, args) { + QUrl url = QUrl::fromEncoded(arg.toLocal8Bit()); + doDownload(url); + } +} + +void DownloadManager::sslErrors(const QList<QSslError> &sslErrors) +{ +#ifndef QT_NO_OPENSSL + foreach (const QSslError &error, sslErrors) + fprintf(stderr, "SSL error: %s\n", qPrintable(error.errorString())); +#endif +} + +void DownloadManager::downloadFinished(QNetworkReply *reply) +{ + QUrl url = reply->url(); + if (reply->error()) { + fprintf(stderr, "Download of %s failed: %s\n", + url.toEncoded().constData(), + qPrintable(reply->errorString())); + } else { + QString filename = saveFileName(url); + if (saveToDisk(filename, reply)) + printf("Download of %s succeeded (saved to %s)\n", + url.toEncoded().constData(), qPrintable(filename)); + } + + currentDownloads.removeAll(reply); + reply->deleteLater(); + + if (currentDownloads.isEmpty()) + // all downloads finished + QCoreApplication::instance()->quit(); +} + +int main(int argc, char **argv) +{ + QCoreApplication app(argc, argv); + + DownloadManager manager; + QTimer::singleShot(0, &manager, SLOT(execute())); + + app.exec(); +} + +#include "main.moc" |