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****************************************************************************/

#include "networkaccessmanager.h"

#include "browserapplication.h"

#include "browsermainwindow.h"

#include "ui_passworddialog.h"

#include "ui_proxy.h"

#include <QtCore/QSettings>

#include <QtGui/QDesktopServices>

#include <QtGui/QDialog>

#include <QtGui/QMessageBox>

#include <QtGui/QStyle>

#include <QtGui/QTextDocument>

#include <QtNetwork/QAuthenticator>

#include <QtNetwork/QNetworkDiskCache>

#include <QtNetwork/QNetworkProxy>

#include <QtNetwork/QNetworkRequest>

#include <QtNetwork/QNetworkReply>

#include <QtNetwork/QSslError>

NetworkAccessManager::NetworkAccessManager(QObject *parent)

    : QNetworkAccessManager(parent),

    requestFinishedCount(0), requestFinishedFromCacheCount(0), requestFinishedPipelinedCount(0),

    requestFinishedSecureCount(0)

{

    connect(this, SIGNAL(authenticationRequired(QNetworkReply*,QAuthenticator*)),

            SLOT(authenticationRequired(QNetworkReply*,QAuthenticator*)));

    connect(this, SIGNAL(proxyAuthenticationRequired(QNetworkProxy,QAuthenticator*)),

            SLOT(proxyAuthenticationRequired(QNetworkProxy,QAuthenticator*)));

    connect(this, SIGNAL(finished(QNetworkReply*)),

            SLOT(requestFinished(QNetworkReply*)));

#ifndef QT_NO_OPENSSL

    connect(this, SIGNAL(sslErrors(QNetworkReply*,QList<QSslError>)),

            SLOT(sslErrors(QNetworkReply*,QList<QSslError>)));

#endif

    loadSettings();

    QNetworkDiskCache *diskCache = new QNetworkDiskCache(this);

    QString location = QDesktopServices::storageLocation(QDesktopServices::CacheLocation);

    diskCache->setCacheDirectory(location);

    setCache(diskCache);

}

QNetworkReply* NetworkAccessManager::createRequest(Operation op, const QNetworkRequest & req, QIODevice * outgoingData)

{

    QNetworkRequest request = req; // copy so we can modify

    // this is a temporary hack until we properly use the pipelining flags from QtWebkit

    // pipeline everything! :)

    request.setAttribute(QNetworkRequest::HttpPipeliningAllowedAttribute, true);

    return QNetworkAccessManager::createRequest(op, request, outgoingData);

}

void NetworkAccessManager::requestFinished(QNetworkReply *reply)

{

    requestFinishedCount++;

    if (reply->attribute(QNetworkRequest::SourceIsFromCacheAttribute).toBool() == true)

        requestFinishedFromCacheCount++;

    if (reply->attribute(QNetworkRequest::HttpPipeliningWasUsedAttribute).toBool() == true)

        requestFinishedPipelinedCount++;

    if (reply->attribute(QNetworkRequest::ConnectionEncryptedAttribute).toBool() == true)

        requestFinishedSecureCount++;

    if (requestFinishedCount % 10)

        return;

    double pctCached = (double(requestFinishedFromCacheCount) * 100.0/ double(requestFinishedCount));

    double pctPipelined = (double(requestFinishedPipelinedCount) * 100.0/ double(requestFinishedCount));

    double pctSecure = (double(requestFinishedSecureCount) * 100.0/ double(requestFinishedCount));

#ifdef QT_DEBUG

    qDebug("STATS [%lli requests total] [%3.2f%% from cache] [%3.2f%% pipelined] [%3.2f%% SSL/TLS]", requestFinishedCount, pctCached, pctPipelined, pctSecure);

#endif

}

void NetworkAccessManager::loadSettings()

{

    QSettings settings;

    settings.beginGroup(QLatin1String("proxy"));

    QNetworkProxy proxy;

    if (settings.value(QLatin1String("enabled"), false).toBool()) {

        if (settings.value(QLatin1String("type"), 0).toInt() == 0)

            proxy = QNetworkProxy::Socks5Proxy;

        else

            proxy = QNetworkProxy::HttpProxy;

        proxy.setHostName(settings.value(QLatin1String("hostName")).toString());

        proxy.setPort(settings.value(QLatin1String("port"), 1080).toInt());

        proxy.setUser(settings.value(QLatin1String("userName")).toString());

        proxy.setPassword(settings.value(QLatin1String("password")).toString());

    }

    setProxy(proxy);

}

void NetworkAccessManager::authenticationRequired(QNetworkReply *reply, QAuthenticator *auth)

{

    BrowserMainWindow *mainWindow = BrowserApplication::instance()->mainWindow();

    QDialog dialog(mainWindow);

    dialog.setWindowFlags(Qt::Sheet);

    Ui::PasswordDialog passwordDialog;

    passwordDialog.setupUi(&dialog);

    passwordDialog.iconLabel->setText(QString());

    passwordDialog.iconLabel->setPixmap(mainWindow->style()->standardIcon(QStyle::SP_MessageBoxQuestion, 0, mainWindow).pixmap(32, 32));

    QString introMessage = tr("<qt>Enter username and password for \"%1\" at %2</qt>");

    introMessage = introMessage.arg(Qt::escape(reply->url().toString())).arg(Qt::escape(reply->url().toString()));

    passwordDialog.introLabel->setText(introMessage);

    passwordDialog.introLabel->setWordWrap(true);

    if (dialog.exec() == QDialog::Accepted) {

        auth->setUser(passwordDialog.userNameLineEdit->text());

        auth->setPassword(passwordDialog.passwordLineEdit->text());

    }

}

void NetworkAccessManager::proxyAuthenticationRequired(const QNetworkProxy &proxy, QAuthenticator *auth)

{

    BrowserMainWindow *mainWindow = BrowserApplication::instance()->mainWindow();

    QDialog dialog(mainWindow);

    dialog.setWindowFlags(Qt::Sheet);

    Ui::ProxyDialog proxyDialog;

    proxyDialog.setupUi(&dialog);

    proxyDialog.iconLabel->setText(QString());

    proxyDialog.iconLabel->setPixmap(mainWindow->style()->standardIcon(QStyle::SP_MessageBoxQuestion, 0, mainWindow).pixmap(32, 32));

    QString introMessage = tr("<qt>Connect to proxy \"%1\" using:</qt>");

    introMessage = introMessage.arg(Qt::escape(proxy.hostName()));

    proxyDialog.introLabel->setText(introMessage);

    proxyDialog.introLabel->setWordWrap(true);

    if (dialog.exec() == QDialog::Accepted) {

        auth->setUser(proxyDialog.userNameLineEdit->text());

        auth->setPassword(proxyDialog.passwordLineEdit->text());

    }

}

#ifndef QT_NO_OPENSSL

void NetworkAccessManager::sslErrors(QNetworkReply *reply, const QList<QSslError> &error)

{

    // check if SSL certificate has been trusted already

    QString replyHost = reply->url().host() + ":" + reply->url().port();

    if(! sslTrustedHostList.contains(replyHost)) {

        BrowserMainWindow *mainWindow = BrowserApplication::instance()->mainWindow();

        QStringList errorStrings;

        for (int i = 0; i < error.count(); ++i)

            errorStrings += error.at(i).errorString();

        QString errors = errorStrings.join(QLatin1String("\n"));

        int ret = QMessageBox::warning(mainWindow, QCoreApplication::applicationName(),

                tr("SSL Errors:\n\n%1\n\n%2\n\n"

                        "Do you want to ignore these errors for this host?").arg(reply->url().toString()).arg(errors),

                        QMessageBox::Yes | QMessageBox::No,

                        QMessageBox::No);

        if (ret == QMessageBox::Yes) {

            reply->ignoreSslErrors();

            sslTrustedHostList.append(replyHost);

        }

    }

}

#endif