1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the examples of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

    31 **

    32 **

    33 **

    34 **

    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 #include <QtNetwork>

    44 

    45 #include "httpwindow.h"

    46 #include "ui_authenticationdialog.h"

    47 

    48 HttpWindow::HttpWindow(QWidget *parent)

    49     : QDialog(parent)

    50 {

    51 #ifndef QT_NO_OPENSSL

    52     urlLineEdit = new QLineEdit("https://");

    53 #else

    54     urlLineEdit = new QLineEdit("http://");

    55 #endif

    56 

    57     urlLabel = new QLabel(tr("&URL:"));

    58     urlLabel->setBuddy(urlLineEdit);

    59     statusLabel = new QLabel(tr("Please enter the URL of a file you want to "

    60                                 "download."));

    61 

    62     downloadButton = new QPushButton(tr("Download"));

    63     downloadButton->setDefault(true);

    64     quitButton = new QPushButton(tr("Quit"));

    65     quitButton->setAutoDefault(false);

    66 

    67     buttonBox = new QDialogButtonBox;

    68     buttonBox->addButton(downloadButton, QDialogButtonBox::ActionRole);

    69     buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);

    70 

    71     progressDialog = new QProgressDialog(this);

    72 

    73     http = new QHttp(this);

    74 

    75     connect(urlLineEdit, SIGNAL(textChanged(const QString &)),

    76             this, SLOT(enableDownloadButton()));

    77     connect(http, SIGNAL(requestFinished(int, bool)),

    78             this, SLOT(httpRequestFinished(int, bool)));

    79     connect(http, SIGNAL(dataReadProgress(int, int)),

    80             this, SLOT(updateDataReadProgress(int, int)));

    81     connect(http, SIGNAL(responseHeaderReceived(const QHttpResponseHeader &)),

    82             this, SLOT(readResponseHeader(const QHttpResponseHeader &)));

    83     connect(http, SIGNAL(authenticationRequired(const QString &, quint16, QAuthenticator *)),

    84             this, SLOT(slotAuthenticationRequired(const QString &, quint16, QAuthenticator *)));

    85 #ifndef QT_NO_OPENSSL

    86     connect(http, SIGNAL(sslErrors(const QList<QSslError> &)),

    87             this, SLOT(sslErrors(const QList<QSslError> &)));

    88 #endif

    89     connect(progressDialog, SIGNAL(canceled()), this, SLOT(cancelDownload()));

    90     connect(downloadButton, SIGNAL(clicked()), this, SLOT(downloadFile()));

    91     connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));

    92 

    93     QHBoxLayout *topLayout = new QHBoxLayout;

    94     topLayout->addWidget(urlLabel);

    95     topLayout->addWidget(urlLineEdit);

    96 

    97     QVBoxLayout *mainLayout = new QVBoxLayout;

    98     mainLayout->addLayout(topLayout);

    99     mainLayout->addWidget(statusLabel);

   100     mainLayout->addWidget(buttonBox);

   101     setLayout(mainLayout);

   102 

   103     setWindowTitle(tr("HTTP"));

   104     urlLineEdit->setFocus();

   105 }

   106 

   107 void HttpWindow::downloadFile()

   108 {

   109     QUrl url(urlLineEdit->text());

   110     QFileInfo fileInfo(url.path());

   111     QString fileName = fileInfo.fileName();

   112     if (fileName.isEmpty())

   113         fileName = "index.html";

   114 

   115     if (QFile::exists(fileName)) {

   116         if (QMessageBox::question(this, tr("HTTP"), 

   117                                   tr("There already exists a file called %1 in "

   118                                      "the current directory. Overwrite?").arg(fileName),

   119                                   QMessageBox::Yes|QMessageBox::No, QMessageBox::No)

   120             == QMessageBox::No)

   121             return;

   122         QFile::remove(fileName);

   123     }

   124 

   125     file = new QFile(fileName);

   126     if (!file->open(QIODevice::WriteOnly)) {

   127         QMessageBox::information(this, tr("HTTP"),

   128                                  tr("Unable to save the file %1: %2.")

   129                                  .arg(fileName).arg(file->errorString()));

   130         delete file;

   131         file = 0;

   132         return;

   133     }

   134 

   135     QHttp::ConnectionMode mode = url.scheme().toLower() == "https" ? QHttp::ConnectionModeHttps : QHttp::ConnectionModeHttp;

   136     http->setHost(url.host(), mode, url.port() == -1 ? 0 : url.port());

   137     

   138     if (!url.userName().isEmpty())

   139         http->setUser(url.userName(), url.password());

   140 

   141     httpRequestAborted = false;

   142     QByteArray path = QUrl::toPercentEncoding(url.path(), "!$&'()*+,;=:@/");

   143     if (path.isEmpty())

   144         path = "/";

   145     httpGetId = http->get(path, file);

   146 

   147     progressDialog->setWindowTitle(tr("HTTP"));

   148     progressDialog->setLabelText(tr("Downloading %1.").arg(fileName));

   149     downloadButton->setEnabled(false);

   150 }

   151 

   152 void HttpWindow::cancelDownload()

   153 {

   154     statusLabel->setText(tr("Download canceled."));

   155     httpRequestAborted = true;

   156     http->abort();

   157     downloadButton->setEnabled(true);

   158 }

   159 

   160 void HttpWindow::httpRequestFinished(int requestId, bool error)

   161 {

   162     if (requestId != httpGetId)

   163         return;

   164     if (httpRequestAborted) {

   165         if (file) {

   166             file->close();

   167             file->remove();

   168             delete file;

   169             file = 0;

   170         }

   171 

   172         progressDialog->hide();

   173         return;

   174     }

   175 

   176     if (requestId != httpGetId)

   177         return;

   178 

   179     progressDialog->hide();

   180     file->close();

   181 

   182     if (error) {

   183         file->remove();

   184         QMessageBox::information(this, tr("HTTP"),

   185                                  tr("Download failed: %1.")

   186                                  .arg(http->errorString()));

   187     } else {

   188         QString fileName = QFileInfo(QUrl(urlLineEdit->text()).path()).fileName();

   189         statusLabel->setText(tr("Downloaded %1 to current directory.").arg(fileName));

   190     }

   191 

   192     downloadButton->setEnabled(true);

   193     delete file;

   194     file = 0;

   195 }

   196 

   197 void HttpWindow::readResponseHeader(const QHttpResponseHeader &responseHeader)

   198 {

   199     switch (responseHeader.statusCode()) {

   200     case 200:                   // Ok

   201     case 301:                   // Moved Permanently

   202     case 302:                   // Found

   203     case 303:                   // See Other

   204     case 307:                   // Temporary Redirect

   205         // these are not error conditions

   206         break;

   207 

   208     default:

   209         QMessageBox::information(this, tr("HTTP"),

   210                                  tr("Download failed: %1.")

   211                                  .arg(responseHeader.reasonPhrase()));

   212         httpRequestAborted = true;

   213         progressDialog->hide();

   214         http->abort();

   215     }

   216 }

   217 

   218 void HttpWindow::updateDataReadProgress(int bytesRead, int totalBytes)

   219 {

   220     if (httpRequestAborted)

   221         return;

   222 

   223     progressDialog->setMaximum(totalBytes);

   224     progressDialog->setValue(bytesRead);

   225 }

   226 

   227 void HttpWindow::enableDownloadButton()

   228 {

   229     downloadButton->setEnabled(!urlLineEdit->text().isEmpty());

   230 }

   231 

   232 void HttpWindow::slotAuthenticationRequired(const QString &hostName, quint16, QAuthenticator *authenticator)

   233 {

   234     QDialog dlg;

   235     Ui::Dialog ui;

   236     ui.setupUi(&dlg);

   237     dlg.adjustSize();

   238     ui.siteDescription->setText(tr("%1 at %2").arg(authenticator->realm()).arg(hostName));

   239     

   240     if (dlg.exec() == QDialog::Accepted) {

   241         authenticator->setUser(ui.userEdit->text());

   242         authenticator->setPassword(ui.passwordEdit->text());

   243     }

   244 }

   245 

   246 #ifndef QT_NO_OPENSSL

   247 void HttpWindow::sslErrors(const QList<QSslError> &errors)

   248 {

   249     QString errorString;

   250     foreach (const QSslError &error, errors) {

   251         if (!errorString.isEmpty())

   252             errorString += ", ";

   253         errorString += error.errorString();

   254     }

   255     

   256     if (QMessageBox::warning(this, tr("HTTP Example"),

   257                              tr("One or more SSL errors has occurred: %1").arg(errorString),

   258                              QMessageBox::Ignore | QMessageBox::Abort) == QMessageBox::Ignore) {

   259         http->ignoreSslErrors();

   260     }

   261 }

   262 #endif