--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/util/examples/network/http/httpwindow.cpp Wed Mar 31 11:06:36 2010 +0300
@@ -0,0 +1,267 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+#include <QtNetwork>
+
+#include "httpwindow.h"
+#include "ui_authenticationdialog.h"
+
+HttpWindow::HttpWindow(QWidget *parent)
+ : QDialog(parent)
+{
+#ifndef QT_NO_OPENSSL
+ urlLineEdit = new QLineEdit("https://qt.nokia.com/");
+#else
+ urlLineEdit = new QLineEdit("http://qt.nokia.com/");
+#endif
+
+ urlLabel = new QLabel(tr("&URL:"));
+ urlLabel->setBuddy(urlLineEdit);
+ statusLabel = new QLabel(tr("Please enter the URL of a file you want to "
+ "download."));
+
+ downloadButton = new QPushButton(tr("Download"));
+ downloadButton->setDefault(true);
+ quitButton = new QPushButton(tr("Quit"));
+ quitButton->setAutoDefault(false);
+
+ buttonBox = new QDialogButtonBox;
+ buttonBox->addButton(downloadButton, QDialogButtonBox::ActionRole);
+ buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);
+
+ progressDialog = new QProgressDialog(this);
+
+ connect(urlLineEdit, SIGNAL(textChanged(QString)),
+ this, SLOT(enableDownloadButton()));
+
+ connect(&qnam, SIGNAL(authenticationRequired(QNetworkReply*,QAuthenticator*)),
+ this, SLOT(slotAuthenticationRequired(QNetworkReply*,QAuthenticator*)));
+#ifndef QT_NO_OPENSSL
+ connect(&qnam, SIGNAL(sslErrors(QNetworkReply*,QList<QSslError>)),
+ this, SLOT(sslErrors(QNetworkReply*,QList<QSslError>)));
+#endif
+ connect(progressDialog, SIGNAL(canceled()), this, SLOT(cancelDownload()));
+ connect(downloadButton, SIGNAL(clicked()), this, SLOT(downloadFile()));
+ connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
+
+ QHBoxLayout *topLayout = new QHBoxLayout;
+ topLayout->addWidget(urlLabel);
+ topLayout->addWidget(urlLineEdit);
+
+ QVBoxLayout *mainLayout = new QVBoxLayout;
+ mainLayout->addLayout(topLayout);
+ mainLayout->addWidget(statusLabel);
+ mainLayout->addWidget(buttonBox);
+ setLayout(mainLayout);
+
+ setWindowTitle(tr("HTTP"));
+ urlLineEdit->setFocus();
+}
+
+void HttpWindow::startRequest(QUrl url)
+{
+ reply = qnam.get(QNetworkRequest(url));
+ connect(reply, SIGNAL(finished()),
+ this, SLOT(httpFinished()));
+ connect(reply, SIGNAL(readyRead()),
+ this, SLOT(httpReadyRead()));
+ connect(reply, SIGNAL(downloadProgress(qint64,qint64)),
+ this, SLOT(updateDataReadProgress(qint64,qint64)));
+}
+
+void HttpWindow::downloadFile()
+{
+ url = urlLineEdit->text();
+
+ QFileInfo fileInfo(url.path());
+ QString fileName = fileInfo.fileName();
+ if (fileName.isEmpty())
+ fileName = "index.html";
+
+ if (QFile::exists(fileName)) {
+ if (QMessageBox::question(this, tr("HTTP"),
+ tr("There already exists a file called %1 in "
+ "the current directory. Overwrite?").arg(fileName),
+ QMessageBox::Yes|QMessageBox::No, QMessageBox::No)
+ == QMessageBox::No)
+ return;
+ QFile::remove(fileName);
+ }
+
+ file = new QFile(fileName);
+ if (!file->open(QIODevice::WriteOnly)) {
+ QMessageBox::information(this, tr("HTTP"),
+ tr("Unable to save the file %1: %2.")
+ .arg(fileName).arg(file->errorString()));
+ delete file;
+ file = 0;
+ return;
+ }
+
+
+ progressDialog->setWindowTitle(tr("HTTP"));
+ progressDialog->setLabelText(tr("Downloading %1.").arg(fileName));
+ downloadButton->setEnabled(false);
+
+ // schedule the request
+ httpRequestAborted = false;
+ startRequest(url);
+}
+
+void HttpWindow::cancelDownload()
+{
+ statusLabel->setText(tr("Download canceled."));
+ httpRequestAborted = true;
+ reply->abort();
+ downloadButton->setEnabled(true);
+}
+
+void HttpWindow::httpFinished()
+{
+ if (httpRequestAborted) {
+ if (file) {
+ file->close();
+ file->remove();
+ delete file;
+ file = 0;
+ }
+ reply->deleteLater();
+ progressDialog->hide();
+ return;
+ }
+
+ progressDialog->hide();
+ file->flush();
+ file->close();
+
+
+ QVariant redirectionTarget = reply->attribute(QNetworkRequest::RedirectionTargetAttribute);
+ if (reply->error()) {
+ file->remove();
+ QMessageBox::information(this, tr("HTTP"),
+ tr("Download failed: %1.")
+ .arg(reply->errorString()));
+ downloadButton->setEnabled(true);
+ } else if (!redirectionTarget.isNull()) {
+ QUrl newUrl = url.resolved(redirectionTarget.toUrl());
+ if (QMessageBox::question(this, tr("HTTP"),
+ tr("Redirect to %1 ?").arg(newUrl.toString()),
+ QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes) {
+ url = newUrl;
+ reply->deleteLater();
+ file->open(QIODevice::WriteOnly);
+ file->resize(0);
+ startRequest(url);
+ return;
+ }
+ } else {
+ QString fileName = QFileInfo(QUrl(urlLineEdit->text()).path()).fileName();
+ statusLabel->setText(tr("Downloaded %1 to current directory.").arg(fileName));
+ downloadButton->setEnabled(true);
+ }
+
+ reply->deleteLater();
+ reply = 0;
+ delete file;
+ file = 0;
+}
+
+void HttpWindow::httpReadyRead()
+{
+ // this slot gets called everytime the QNetworkReply has new data.
+ // We read all of its new data and write it into the file.
+ // That way we use less RAM than when reading it at the finished()
+ // signal of the QNetworkReply
+ if (file)
+ file->write(reply->readAll());
+}
+
+void HttpWindow::updateDataReadProgress(qint64 bytesRead, qint64 totalBytes)
+{
+ if (httpRequestAborted)
+ return;
+
+ progressDialog->setMaximum(totalBytes);
+ progressDialog->setValue(bytesRead);
+}
+
+void HttpWindow::enableDownloadButton()
+{
+ downloadButton->setEnabled(!urlLineEdit->text().isEmpty());
+}
+
+void HttpWindow::slotAuthenticationRequired(QNetworkReply*,QAuthenticator *authenticator)
+{
+ QDialog dlg;
+ Ui::Dialog ui;
+ ui.setupUi(&dlg);
+ dlg.adjustSize();
+ ui.siteDescription->setText(tr("%1 at %2").arg(authenticator->realm()).arg(url.host()));
+
+ // Did the URL have information? Fill the UI
+ // This is only relevant if the URL-supplied credentials were wrong
+ ui.userEdit->setText(url.userName());
+ ui.passwordEdit->setText(url.password());
+
+ if (dlg.exec() == QDialog::Accepted) {
+ authenticator->setUser(ui.userEdit->text());
+ authenticator->setPassword(ui.passwordEdit->text());
+ }
+}
+
+#ifndef QT_NO_OPENSSL
+void HttpWindow::sslErrors(QNetworkReply*,const QList<QSslError> &errors)
+{
+ QString errorString;
+ foreach (const QSslError &error, errors) {
+ if (!errorString.isEmpty())
+ errorString += ", ";
+ errorString += error.errorString();
+ }
+
+ if (QMessageBox::warning(this, tr("HTTP"),
+ tr("One or more SSL errors has occurred: %1").arg(errorString),
+ QMessageBox::Ignore | QMessageBox::Abort) == QMessageBox::Ignore) {
+ reply->ignoreSslErrors();
+ }
+}
+#endif