[2] | 1 | /****************************************************************************
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| 2 | **
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[846] | 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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[561] | 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation ([email protected])
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[2] | 6 | **
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| 7 | ** This file is part of the examples of the Qt Toolkit.
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| 8 | **
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[846] | 9 | ** $QT_BEGIN_LICENSE:BSD$
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| 10 | ** You may use this file under the terms of the BSD license as follows:
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[2] | 11 | **
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[846] | 12 | ** "Redistribution and use in source and binary forms, with or without
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| 13 | ** modification, are permitted provided that the following conditions are
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| 14 | ** met:
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| 15 | ** * Redistributions of source code must retain the above copyright
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| 16 | ** notice, this list of conditions and the following disclaimer.
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| 17 | ** * Redistributions in binary form must reproduce the above copyright
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| 18 | ** notice, this list of conditions and the following disclaimer in
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| 19 | ** the documentation and/or other materials provided with the
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| 20 | ** distribution.
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| 21 | ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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| 22 | ** the names of its contributors may be used to endorse or promote
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| 23 | ** products derived from this software without specific prior written
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| 24 | ** permission.
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[2] | 25 | **
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[846] | 26 | ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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| 27 | ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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| 28 | ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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| 29 | ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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| 30 | ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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| 31 | ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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| 32 | ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 33 | ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 34 | ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 35 | ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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| 36 | ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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[2] | 37 | ** $QT_END_LICENSE$
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| 38 | **
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| 39 | ****************************************************************************/
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| 40 |
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| 41 | #include <QtGui>
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| 42 | #include <QtNetwork>
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| 43 |
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| 44 | #include "httpwindow.h"
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| 45 | #include "ui_authenticationdialog.h"
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| 46 |
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| 47 | HttpWindow::HttpWindow(QWidget *parent)
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| 48 | : QDialog(parent)
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| 49 | {
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| 50 | #ifndef QT_NO_OPENSSL
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[769] | 51 | urlLineEdit = new QLineEdit("https://qt.nokia.com/");
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[2] | 52 | #else
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[769] | 53 | urlLineEdit = new QLineEdit("http://qt.nokia.com/");
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[2] | 54 | #endif
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| 55 |
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| 56 | urlLabel = new QLabel(tr("&URL:"));
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| 57 | urlLabel->setBuddy(urlLineEdit);
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| 58 | statusLabel = new QLabel(tr("Please enter the URL of a file you want to "
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| 59 | "download."));
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| 60 |
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| 61 | downloadButton = new QPushButton(tr("Download"));
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| 62 | downloadButton->setDefault(true);
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| 63 | quitButton = new QPushButton(tr("Quit"));
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| 64 | quitButton->setAutoDefault(false);
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| 65 |
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| 66 | buttonBox = new QDialogButtonBox;
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| 67 | buttonBox->addButton(downloadButton, QDialogButtonBox::ActionRole);
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| 68 | buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);
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| 69 |
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| 70 | progressDialog = new QProgressDialog(this);
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| 71 |
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[561] | 72 | connect(urlLineEdit, SIGNAL(textChanged(QString)),
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[2] | 73 | this, SLOT(enableDownloadButton()));
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[769] | 74 |
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| 75 | connect(&qnam, SIGNAL(authenticationRequired(QNetworkReply*,QAuthenticator*)),
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| 76 | this, SLOT(slotAuthenticationRequired(QNetworkReply*,QAuthenticator*)));
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[2] | 77 | #ifndef QT_NO_OPENSSL
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[769] | 78 | connect(&qnam, SIGNAL(sslErrors(QNetworkReply*,QList<QSslError>)),
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| 79 | this, SLOT(sslErrors(QNetworkReply*,QList<QSslError>)));
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[2] | 80 | #endif
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| 81 | connect(progressDialog, SIGNAL(canceled()), this, SLOT(cancelDownload()));
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| 82 | connect(downloadButton, SIGNAL(clicked()), this, SLOT(downloadFile()));
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| 83 | connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
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| 84 |
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| 85 | QHBoxLayout *topLayout = new QHBoxLayout;
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| 86 | topLayout->addWidget(urlLabel);
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| 87 | topLayout->addWidget(urlLineEdit);
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| 88 |
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| 89 | QVBoxLayout *mainLayout = new QVBoxLayout;
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| 90 | mainLayout->addLayout(topLayout);
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| 91 | mainLayout->addWidget(statusLabel);
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| 92 | mainLayout->addWidget(buttonBox);
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| 93 | setLayout(mainLayout);
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| 94 |
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| 95 | setWindowTitle(tr("HTTP"));
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| 96 | urlLineEdit->setFocus();
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| 97 | }
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| 98 |
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[769] | 99 | void HttpWindow::startRequest(QUrl url)
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| 100 | {
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| 101 | reply = qnam.get(QNetworkRequest(url));
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| 102 | connect(reply, SIGNAL(finished()),
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| 103 | this, SLOT(httpFinished()));
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| 104 | connect(reply, SIGNAL(readyRead()),
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| 105 | this, SLOT(httpReadyRead()));
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| 106 | connect(reply, SIGNAL(downloadProgress(qint64,qint64)),
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| 107 | this, SLOT(updateDataReadProgress(qint64,qint64)));
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| 108 | }
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| 109 |
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[2] | 110 | void HttpWindow::downloadFile()
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| 111 | {
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[769] | 112 | url = urlLineEdit->text();
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| 113 |
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[2] | 114 | QFileInfo fileInfo(url.path());
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| 115 | QString fileName = fileInfo.fileName();
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| 116 | if (fileName.isEmpty())
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| 117 | fileName = "index.html";
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| 118 |
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| 119 | if (QFile::exists(fileName)) {
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| 120 | if (QMessageBox::question(this, tr("HTTP"),
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| 121 | tr("There already exists a file called %1 in "
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| 122 | "the current directory. Overwrite?").arg(fileName),
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[561] | 123 | QMessageBox::Yes|QMessageBox::No, QMessageBox::No)
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| 124 | == QMessageBox::No)
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[2] | 125 | return;
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| 126 | QFile::remove(fileName);
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| 127 | }
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| 128 |
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| 129 | file = new QFile(fileName);
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| 130 | if (!file->open(QIODevice::WriteOnly)) {
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| 131 | QMessageBox::information(this, tr("HTTP"),
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| 132 | tr("Unable to save the file %1: %2.")
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| 133 | .arg(fileName).arg(file->errorString()));
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| 134 | delete file;
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| 135 | file = 0;
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| 136 | return;
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| 137 | }
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| 138 |
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| 139 |
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| 140 | progressDialog->setWindowTitle(tr("HTTP"));
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| 141 | progressDialog->setLabelText(tr("Downloading %1.").arg(fileName));
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| 142 | downloadButton->setEnabled(false);
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[769] | 143 |
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| 144 | // schedule the request
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| 145 | httpRequestAborted = false;
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| 146 | startRequest(url);
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[2] | 147 | }
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| 148 |
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| 149 | void HttpWindow::cancelDownload()
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| 150 | {
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| 151 | statusLabel->setText(tr("Download canceled."));
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| 152 | httpRequestAborted = true;
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[769] | 153 | reply->abort();
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[2] | 154 | downloadButton->setEnabled(true);
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| 155 | }
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| 156 |
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[769] | 157 | void HttpWindow::httpFinished()
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[2] | 158 | {
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| 159 | if (httpRequestAborted) {
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| 160 | if (file) {
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| 161 | file->close();
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| 162 | file->remove();
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| 163 | delete file;
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| 164 | file = 0;
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| 165 | }
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[769] | 166 | reply->deleteLater();
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[2] | 167 | progressDialog->hide();
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| 168 | return;
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| 169 | }
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| 170 |
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| 171 | progressDialog->hide();
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[769] | 172 | file->flush();
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[2] | 173 | file->close();
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| 174 |
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[769] | 175 |
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| 176 | QVariant redirectionTarget = reply->attribute(QNetworkRequest::RedirectionTargetAttribute);
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| 177 | if (reply->error()) {
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[2] | 178 | file->remove();
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| 179 | QMessageBox::information(this, tr("HTTP"),
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| 180 | tr("Download failed: %1.")
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[769] | 181 | .arg(reply->errorString()));
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| 182 | downloadButton->setEnabled(true);
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| 183 | } else if (!redirectionTarget.isNull()) {
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| 184 | QUrl newUrl = url.resolved(redirectionTarget.toUrl());
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| 185 | if (QMessageBox::question(this, tr("HTTP"),
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| 186 | tr("Redirect to %1 ?").arg(newUrl.toString()),
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| 187 | QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes) {
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| 188 | url = newUrl;
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| 189 | reply->deleteLater();
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| 190 | file->open(QIODevice::WriteOnly);
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| 191 | file->resize(0);
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| 192 | startRequest(url);
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| 193 | return;
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| 194 | }
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[2] | 195 | } else {
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| 196 | QString fileName = QFileInfo(QUrl(urlLineEdit->text()).path()).fileName();
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| 197 | statusLabel->setText(tr("Downloaded %1 to current directory.").arg(fileName));
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[769] | 198 | downloadButton->setEnabled(true);
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[2] | 199 | }
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| 200 |
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[769] | 201 | reply->deleteLater();
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| 202 | reply = 0;
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[2] | 203 | delete file;
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| 204 | file = 0;
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| 205 | }
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| 206 |
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[769] | 207 | void HttpWindow::httpReadyRead()
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[2] | 208 | {
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[846] | 209 | // this slot gets called every time the QNetworkReply has new data.
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[769] | 210 | // We read all of its new data and write it into the file.
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| 211 | // That way we use less RAM than when reading it at the finished()
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| 212 | // signal of the QNetworkReply
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| 213 | if (file)
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| 214 | file->write(reply->readAll());
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[2] | 215 | }
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| 216 |
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[769] | 217 | void HttpWindow::updateDataReadProgress(qint64 bytesRead, qint64 totalBytes)
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[2] | 218 | {
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| 219 | if (httpRequestAborted)
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| 220 | return;
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| 221 |
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| 222 | progressDialog->setMaximum(totalBytes);
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| 223 | progressDialog->setValue(bytesRead);
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| 224 | }
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| 225 |
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| 226 | void HttpWindow::enableDownloadButton()
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| 227 | {
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| 228 | downloadButton->setEnabled(!urlLineEdit->text().isEmpty());
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| 229 | }
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| 230 |
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[769] | 231 | void HttpWindow::slotAuthenticationRequired(QNetworkReply*,QAuthenticator *authenticator)
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[2] | 232 | {
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| 233 | QDialog dlg;
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| 234 | Ui::Dialog ui;
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| 235 | ui.setupUi(&dlg);
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| 236 | dlg.adjustSize();
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[769] | 237 | ui.siteDescription->setText(tr("%1 at %2").arg(authenticator->realm()).arg(url.host()));
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| 238 |
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| 239 | // Did the URL have information? Fill the UI
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| 240 | // This is only relevant if the URL-supplied credentials were wrong
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| 241 | ui.userEdit->setText(url.userName());
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| 242 | ui.passwordEdit->setText(url.password());
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| 243 |
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[2] | 244 | if (dlg.exec() == QDialog::Accepted) {
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| 245 | authenticator->setUser(ui.userEdit->text());
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| 246 | authenticator->setPassword(ui.passwordEdit->text());
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| 247 | }
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| 248 | }
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| 249 |
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| 250 | #ifndef QT_NO_OPENSSL
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[769] | 251 | void HttpWindow::sslErrors(QNetworkReply*,const QList<QSslError> &errors)
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[2] | 252 | {
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| 253 | QString errorString;
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| 254 | foreach (const QSslError &error, errors) {
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| 255 | if (!errorString.isEmpty())
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| 256 | errorString += ", ";
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| 257 | errorString += error.errorString();
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| 258 | }
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| 259 |
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[769] | 260 | if (QMessageBox::warning(this, tr("HTTP"),
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[2] | 261 | tr("One or more SSL errors has occurred: %1").arg(errorString),
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| 262 | QMessageBox::Ignore | QMessageBox::Abort) == QMessageBox::Ignore) {
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[769] | 263 | reply->ignoreSslErrors();
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[2] | 264 | }
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| 265 | }
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| 266 | #endif
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