networkaccessmanager.cpp Example File | Qt WebKit Examples 5.9

Qt 5.9 | Qt WebKit Examples | Tab Browser | networkaccessmanager.cpp Example File

Qt 5.9.2 Reference Documentation

# networkaccessmanager.cpp Example File

webkitwidgets/browser/networkaccessmanager.cpp

      /****************************************************************************
      **
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      ** Contact: http://www.qt.io/licensing/
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      ** This file is part of the demonstration applications of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:LGPL21$
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      ** Alternatively, this file may be used under the terms of the GNU Lesser
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      ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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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 <QtWidgets/QDialog>
      #include <QtWidgets/QMessageBox>
      #include <QtWidgets/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), requestFinishedDownloadBufferCount(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 = QStandardPaths::writableLocation(QStandardPaths::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 (reply->attribute(QNetworkRequest::DownloadBufferAttribute).isValid() == true)
              requestFinishedDownloadBufferCount++;

          if (requestFinishedCount % 10)
              return;

      #ifdef QT_DEBUG
          double pctCached = (double(requestFinishedFromCacheCount) * 100.0/ double(requestFinishedCount));
          double pctPipelined = (double(requestFinishedPipelinedCount) * 100.0/ double(requestFinishedCount));
          double pctSecure = (double(requestFinishedSecureCount) * 100.0/ double(requestFinishedCount));
          double pctDownloadBuffer = (double(requestFinishedDownloadBufferCount) * 100.0/ double(requestFinishedCount));

          qDebug("STATS [%lli requests total] [%3.2f%% from cache] [%3.2f%% pipelined] [%3.2f%% SSL/TLS] [%3.2f%% Zerocopy]", requestFinishedCount, pctCached, pctPipelined, pctSecure, pctDownloadBuffer);
      #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(reply->url().toString().toHtmlEscaped()).arg(reply->url().toString().toHtmlEscaped());
          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(proxy.hostName().toHtmlEscaped());
          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() + QString(":%1").arg(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