/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the examples of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include <QtGui>+
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#include <QtNetwork>+
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+
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#include "httpwindow.h"+
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#include "ui_authenticationdialog.h"+
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+
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HttpWindow::HttpWindow(QWidget *parent)+
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    : QDialog(parent)+
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{+
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#ifndef QT_NO_OPENSSL+
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    urlLineEdit = new QLineEdit("https://");+
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#else+
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    urlLineEdit = new QLineEdit("http://");+
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#endif+
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+
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    urlLabel = new QLabel(tr("&URL:"));+
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    urlLabel->setBuddy(urlLineEdit);+
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    statusLabel = new QLabel(tr("Please enter the URL of a file you want to "+
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                                "download."));+
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+
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    downloadButton = new QPushButton(tr("Download"));+
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    downloadButton->setDefault(true);+
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    quitButton = new QPushButton(tr("Quit"));+
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    quitButton->setAutoDefault(false);+
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+
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    buttonBox = new QDialogButtonBox;+
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    buttonBox->addButton(downloadButton, QDialogButtonBox::ActionRole);+
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    buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);+
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+
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    progressDialog = new QProgressDialog(this);+
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+
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    http = new QHttp(this);+
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+
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    connect(urlLineEdit, SIGNAL(textChanged(QString)),+
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            this, SLOT(enableDownloadButton()));+
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    connect(http, SIGNAL(requestFinished(int,bool)),+
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            this, SLOT(httpRequestFinished(int,bool)));+
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    connect(http, SIGNAL(dataReadProgress(int,int)),+
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            this, SLOT(updateDataReadProgress(int,int)));+
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    connect(http, SIGNAL(responseHeaderReceived(QHttpResponseHeader)),+
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            this, SLOT(readResponseHeader(QHttpResponseHeader)));+
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    connect(http, SIGNAL(authenticationRequired(QString,quint16,QAuthenticator*)),+
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            this, SLOT(slotAuthenticationRequired(QString,quint16,QAuthenticator*)));+
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#ifndef QT_NO_OPENSSL+
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    connect(http, SIGNAL(sslErrors(QList<QSslError>)),+
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            this, SLOT(sslErrors(QList<QSslError>)));+
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#endif+
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    connect(progressDialog, SIGNAL(canceled()), this, SLOT(cancelDownload()));+
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    connect(downloadButton, SIGNAL(clicked()), this, SLOT(downloadFile()));+
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    connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));+
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+
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    QHBoxLayout *topLayout = new QHBoxLayout;+
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    topLayout->addWidget(urlLabel);+
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    topLayout->addWidget(urlLineEdit);+
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+
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    QVBoxLayout *mainLayout = new QVBoxLayout;+
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    mainLayout->addLayout(topLayout);+
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    mainLayout->addWidget(statusLabel);+
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    mainLayout->addWidget(buttonBox);+
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    setLayout(mainLayout);+
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+
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    setWindowTitle(tr("HTTP"));+
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    urlLineEdit->setFocus();+
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}+
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+
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void HttpWindow::downloadFile()+
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{+
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    QUrl url(urlLineEdit->text());+
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    QFileInfo fileInfo(url.path());+
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    QString fileName = fileInfo.fileName();+
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    if (fileName.isEmpty())+
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        fileName = "index.html";+
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+
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    if (QFile::exists(fileName)) {+
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        if (QMessageBox::question(this, tr("HTTP"), +
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                                  tr("There already exists a file called %1 in "+
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                                     "the current directory. Overwrite?").arg(fileName),+
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                                  QMessageBox::Yes|QMessageBox::No, QMessageBox::No)+
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            == QMessageBox::No)+
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            return;+
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        QFile::remove(fileName);+
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    }+
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+
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    file = new QFile(fileName);+
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    if (!file->open(QIODevice::WriteOnly)) {+
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        QMessageBox::information(this, tr("HTTP"),+
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                                 tr("Unable to save the file %1: %2.")+
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                                 .arg(fileName).arg(file->errorString()));+
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        delete file;+
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        file = 0;+
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        return;+
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    }+
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+
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    QHttp::ConnectionMode mode = url.scheme().toLower() == "https" ? QHttp::ConnectionModeHttps : QHttp::ConnectionModeHttp;+
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    http->setHost(url.host(), mode, url.port() == -1 ? 0 : url.port());+
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    +
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    if (!url.userName().isEmpty())+
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        http->setUser(url.userName(), url.password());+
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+
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    httpRequestAborted = false;+
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    QByteArray path = QUrl::toPercentEncoding(url.path(), "!$&'()*+,;=:@/");+
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    if (path.isEmpty())+
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        path = "/";+
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    httpGetId = http->get(path, file);+
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+
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    progressDialog->setWindowTitle(tr("HTTP"));+
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    progressDialog->setLabelText(tr("Downloading %1.").arg(fileName));+
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    downloadButton->setEnabled(false);+
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}+
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+
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void HttpWindow::cancelDownload()+
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{+
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    statusLabel->setText(tr("Download canceled."));+
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    httpRequestAborted = true;+
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    http->abort();+
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    downloadButton->setEnabled(true);+
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}+
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+
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void HttpWindow::httpRequestFinished(int requestId, bool error)+
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{+
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    if (requestId != httpGetId)+
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        return;+
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    if (httpRequestAborted) {+
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        if (file) {+
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            file->close();+
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            file->remove();+
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            delete file;+
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            file = 0;+
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        }+
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+
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        progressDialog->hide();+
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        return;+
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    }+
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+
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    if (requestId != httpGetId)+
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        return;+
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+
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    progressDialog->hide();+
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    file->close();+
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+
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    if (error) {+
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        file->remove();+
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        QMessageBox::information(this, tr("HTTP"),+
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                                 tr("Download failed: %1.")+
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                                 .arg(http->errorString()));+
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    } else {+
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        QString fileName = QFileInfo(QUrl(urlLineEdit->text()).path()).fileName();+
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        statusLabel->setText(tr("Downloaded %1 to current directory.").arg(fileName));+
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    }+
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+
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    downloadButton->setEnabled(true);+
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    delete file;+
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    file = 0;+
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}+
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+
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void HttpWindow::readResponseHeader(const QHttpResponseHeader &responseHeader)+
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{+
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    switch (responseHeader.statusCode()) {+
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    case 200:                   // Ok+
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    case 301:                   // Moved Permanently+
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    case 302:                   // Found+
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    case 303:                   // See Other+
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    case 307:                   // Temporary Redirect+
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        // these are not error conditions+
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        break;+
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+
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    default:+
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        QMessageBox::information(this, tr("HTTP"),+
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                                 tr("Download failed: %1.")+
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                                 .arg(responseHeader.reasonPhrase()));+
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        httpRequestAborted = true;+
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        progressDialog->hide();+
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        http->abort();+
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    }+
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}+
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+
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void HttpWindow::updateDataReadProgress(int bytesRead, int totalBytes)+
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{+
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    if (httpRequestAborted)+
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        return;+
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+
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    progressDialog->setMaximum(totalBytes);+
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    progressDialog->setValue(bytesRead);+
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}+
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+
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void HttpWindow::enableDownloadButton()+
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{+
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    downloadButton->setEnabled(!urlLineEdit->text().isEmpty());+
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}+
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+
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void HttpWindow::slotAuthenticationRequired(const QString &hostName, quint16, QAuthenticator *authenticator)+
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{+
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    QDialog dlg;+
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    Ui::Dialog ui;+
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    ui.setupUi(&dlg);+
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    dlg.adjustSize();+
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    ui.siteDescription->setText(tr("%1 at %2").arg(authenticator->realm()).arg(hostName));+
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    +
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    if (dlg.exec() == QDialog::Accepted) {+
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        authenticator->setUser(ui.userEdit->text());+
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        authenticator->setPassword(ui.passwordEdit->text());+
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    }+
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}+
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+
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#ifndef QT_NO_OPENSSL+
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void HttpWindow::sslErrors(const QList<QSslError> &errors)+
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{+
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    QString errorString;+
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    foreach (const QSslError &error, errors) {+
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        if (!errorString.isEmpty())+
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            errorString += ", ";+
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        errorString += error.errorString();+
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    }+
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    +
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    if (QMessageBox::warning(this, tr("HTTP Example"),+
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                             tr("One or more SSL errors has occurred: %1").arg(errorString),+
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                             QMessageBox::Ignore | QMessageBox::Abort) == QMessageBox::Ignore) {+
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        http->ignoreSslErrors();+
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    }+
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}+
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#endif+
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