1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
|
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
#include <QtNetwork>
#include "httpwindow.h"
#include "ui_authenticationdialog.h"
HttpWindow::HttpWindow(QWidget *parent)
: QDialog(parent)
{
#ifndef QT_NO_OPENSSL
urlLineEdit = new QLineEdit("https://");
#else
urlLineEdit = new QLineEdit("http://");
#endif
urlLabel = new QLabel(tr("&URL:"));
urlLabel->setBuddy(urlLineEdit);
statusLabel = new QLabel(tr("Please enter the URL of a file you want to "
"download."));
downloadButton = new QPushButton(tr("Download"));
downloadButton->setDefault(true);
quitButton = new QPushButton(tr("Quit"));
quitButton->setAutoDefault(false);
buttonBox = new QDialogButtonBox;
buttonBox->addButton(downloadButton, QDialogButtonBox::ActionRole);
buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);
progressDialog = new QProgressDialog(this);
http = new QHttp(this);
connect(urlLineEdit, SIGNAL(textChanged(const QString &)),
this, SLOT(enableDownloadButton()));
connect(http, SIGNAL(requestFinished(int, bool)),
this, SLOT(httpRequestFinished(int, bool)));
connect(http, SIGNAL(dataReadProgress(int, int)),
this, SLOT(updateDataReadProgress(int, int)));
connect(http, SIGNAL(responseHeaderReceived(const QHttpResponseHeader &)),
this, SLOT(readResponseHeader(const QHttpResponseHeader &)));
connect(http, SIGNAL(authenticationRequired(const QString &, quint16, QAuthenticator *)),
this, SLOT(slotAuthenticationRequired(const QString &, quint16, QAuthenticator *)));
#ifndef QT_NO_OPENSSL
connect(http, SIGNAL(sslErrors(const QList<QSslError> &)),
this, SLOT(sslErrors(const QList<QSslError> &)));
#endif
connect(progressDialog, SIGNAL(canceled()), this, SLOT(cancelDownload()));
connect(downloadButton, SIGNAL(clicked()), this, SLOT(downloadFile()));
connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
QHBoxLayout *topLayout = new QHBoxLayout;
topLayout->addWidget(urlLabel);
topLayout->addWidget(urlLineEdit);
QVBoxLayout *mainLayout = new QVBoxLayout;
mainLayout->addLayout(topLayout);
mainLayout->addWidget(statusLabel);
mainLayout->addWidget(buttonBox);
setLayout(mainLayout);
setWindowTitle(tr("HTTP"));
urlLineEdit->setFocus();
}
void HttpWindow::downloadFile()
{
QUrl url(urlLineEdit->text());
QFileInfo fileInfo(url.path());
QString fileName = fileInfo.fileName();
if (fileName.isEmpty())
fileName = "index.html";
if (QFile::exists(fileName)) {
if (QMessageBox::question(this, tr("HTTP"),
tr("There already exists a file called %1 in "
"the current directory. Overwrite?").arg(fileName),
QMessageBox::Yes|QMessageBox::No, QMessageBox::No)
== QMessageBox::No)
return;
QFile::remove(fileName);
}
file = new QFile(fileName);
if (!file->open(QIODevice::WriteOnly)) {
QMessageBox::information(this, tr("HTTP"),
tr("Unable to save the file %1: %2.")
.arg(fileName).arg(file->errorString()));
delete file;
file = 0;
return;
}
QHttp::ConnectionMode mode = url.scheme().toLower() == "https" ? QHttp::ConnectionModeHttps : QHttp::ConnectionModeHttp;
http->setHost(url.host(), mode, url.port() == -1 ? 0 : url.port());
if (!url.userName().isEmpty())
http->setUser(url.userName(), url.password());
httpRequestAborted = false;
QByteArray path = QUrl::toPercentEncoding(url.path(), "!$&'()*+,;=:@/");
if (path.isEmpty())
path = "/";
httpGetId = http->get(path, file);
progressDialog->setWindowTitle(tr("HTTP"));
progressDialog->setLabelText(tr("Downloading %1.").arg(fileName));
downloadButton->setEnabled(false);
}
void HttpWindow::cancelDownload()
{
statusLabel->setText(tr("Download canceled."));
httpRequestAborted = true;
http->abort();
downloadButton->setEnabled(true);
}
void HttpWindow::httpRequestFinished(int requestId, bool error)
{
if (requestId != httpGetId)
return;
if (httpRequestAborted) {
if (file) {
file->close();
file->remove();
delete file;
file = 0;
}
progressDialog->hide();
return;
}
if (requestId != httpGetId)
return;
progressDialog->hide();
file->close();
if (error) {
file->remove();
QMessageBox::information(this, tr("HTTP"),
tr("Download failed: %1.")
.arg(http->errorString()));
} else {
QString fileName = QFileInfo(QUrl(urlLineEdit->text()).path()).fileName();
statusLabel->setText(tr("Downloaded %1 to current directory.").arg(fileName));
}
downloadButton->setEnabled(true);
delete file;
file = 0;
}
void HttpWindow::readResponseHeader(const QHttpResponseHeader &responseHeader)
{
switch (responseHeader.statusCode()) {
case 200: // Ok
case 301: // Moved Permanently
case 302: // Found
case 303: // See Other
case 307: // Temporary Redirect
// these are not error conditions
break;
default:
QMessageBox::information(this, tr("HTTP"),
tr("Download failed: %1.")
.arg(responseHeader.reasonPhrase()));
httpRequestAborted = true;
progressDialog->hide();
http->abort();
}
}
void HttpWindow::updateDataReadProgress(int bytesRead, int totalBytes)
{
if (httpRequestAborted)
return;
progressDialog->setMaximum(totalBytes);
progressDialog->setValue(bytesRead);
}
void HttpWindow::enableDownloadButton()
{
downloadButton->setEnabled(!urlLineEdit->text().isEmpty());
}
void HttpWindow::slotAuthenticationRequired(const QString &hostName, quint16, QAuthenticator *authenticator)
{
QDialog dlg;
Ui::Dialog ui;
ui.setupUi(&dlg);
dlg.adjustSize();
ui.siteDescription->setText(tr("%1 at %2").arg(authenticator->realm()).arg(hostName));
if (dlg.exec() == QDialog::Accepted) {
authenticator->setUser(ui.userEdit->text());
authenticator->setPassword(ui.passwordEdit->text());
}
}
#ifndef QT_NO_OPENSSL
void HttpWindow::sslErrors(const QList<QSslError> &errors)
{
QString errorString;
foreach (const QSslError &error, errors) {
if (!errorString.isEmpty())
errorString += ", ";
errorString += error.errorString();
}
if (QMessageBox::warning(this, tr("HTTP Example"),
tr("One or more SSL errors has occurred: %1").arg(errorString),
QMessageBox::Ignore | QMessageBox::Abort) == QMessageBox::Ignore) {
http->ignoreSslErrors();
}
}
#endif
|
