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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 266 insertions, 0 deletions

diff --git a/examples/network/http/httpwindow.cpp b/examples/network/http/httpwindow.cpp
new file mode 100644
index 0000000000..874994ab92
--- /dev/null
+++ b/examples/network/http/httpwindow.cpp
@@ -0,0 +1,266 @@
+/****************************************************************************
+**
+** 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 <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 every time 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