--- a/examples/network/http/httpwindow.cpp Mon Mar 15 12:43:09 2010 +0200
+++ b/examples/network/http/httpwindow.cpp Thu Apr 08 14:19:33 2010 +0300
@@ -49,9 +49,9 @@
: QDialog(parent)
{
#ifndef QT_NO_OPENSSL
- urlLineEdit = new QLineEdit("https://");
+ urlLineEdit = new QLineEdit("https://qt.nokia.com/");
#else
- urlLineEdit = new QLineEdit("http://");
+ urlLineEdit = new QLineEdit("http://qt.nokia.com/");
#endif
urlLabel = new QLabel(tr("&URL:"));
@@ -70,21 +70,14 @@
progressDialog = new QProgressDialog(this);
- http = new QHttp(this);
-
connect(urlLineEdit, SIGNAL(textChanged(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(QHttpResponseHeader)),
- this, SLOT(readResponseHeader(QHttpResponseHeader)));
- connect(http, SIGNAL(authenticationRequired(QString,quint16,QAuthenticator*)),
- this, SLOT(slotAuthenticationRequired(QString,quint16,QAuthenticator*)));
+
+ connect(&qnam, SIGNAL(authenticationRequired(QNetworkReply*,QAuthenticator*)),
+ this, SLOT(slotAuthenticationRequired(QNetworkReply*,QAuthenticator*)));
#ifndef QT_NO_OPENSSL
- connect(http, SIGNAL(sslErrors(QList<QSslError>)),
- this, SLOT(sslErrors(QList<QSslError>)));
+ connect(&qnam, SIGNAL(sslErrors(QNetworkReply*,QList<QSslError>)),
+ this, SLOT(sslErrors(QNetworkReply*,QList<QSslError>)));
#endif
connect(progressDialog, SIGNAL(canceled()), this, SLOT(cancelDownload()));
connect(downloadButton, SIGNAL(clicked()), this, SLOT(downloadFile()));
@@ -104,9 +97,21 @@
urlLineEdit->setFocus();
}
+void HttpWindow::startRequest(QUrl url)
+{
+ reply = qnam.get(QNetworkRequest(url));
+ connect(reply, SIGNAL(finished()),
+ this, SLOT(httpFinished()));
+ connect(reply, SIGNAL(readyRead()),
+ this, SLOT(httpReadyRead()));
+ connect(reply, SIGNAL(downloadProgress(qint64,qint64)),
+ this, SLOT(updateDataReadProgress(qint64,qint64)));
+}
+
void HttpWindow::downloadFile()
{
- QUrl url(urlLineEdit->text());
+ url = urlLineEdit->text();
+
QFileInfo fileInfo(url.path());
QString fileName = fileInfo.fileName();
if (fileName.isEmpty())
@@ -132,35 +137,26 @@
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);
+
+ // schedule the request
+ httpRequestAborted = false;
+ startRequest(url);
}
void HttpWindow::cancelDownload()
{
statusLabel->setText(tr("Download canceled."));
httpRequestAborted = true;
- http->abort();
+ reply->abort();
downloadButton->setEnabled(true);
}
-void HttpWindow::httpRequestFinished(int requestId, bool error)
+void HttpWindow::httpFinished()
{
- if (requestId != httpGetId)
- return;
if (httpRequestAborted) {
if (file) {
file->close();
@@ -168,54 +164,58 @@
delete file;
file = 0;
}
-
+ reply->deleteLater();
progressDialog->hide();
return;
}
- if (requestId != httpGetId)
- return;
-
progressDialog->hide();
+ file->flush();
file->close();
- if (error) {
+
+ QVariant redirectionTarget = reply->attribute(QNetworkRequest::RedirectionTargetAttribute);
+ if (reply->error()) {
file->remove();
QMessageBox::information(this, tr("HTTP"),
tr("Download failed: %1.")
- .arg(http->errorString()));
+ .arg(reply->errorString()));
+ downloadButton->setEnabled(true);
+ } else if (!redirectionTarget.isNull()) {
+ QUrl newUrl = url.resolved(redirectionTarget.toUrl());
+ if (QMessageBox::question(this, tr("HTTP"),
+ tr("Redirect to %1 ?").arg(newUrl.toString()),
+ QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes) {
+ url = newUrl;
+ reply->deleteLater();
+ file->open(QIODevice::WriteOnly);
+ file->resize(0);
+ startRequest(url);
+ return;
+ }
} else {
QString fileName = QFileInfo(QUrl(urlLineEdit->text()).path()).fileName();
statusLabel->setText(tr("Downloaded %1 to current directory.").arg(fileName));
+ downloadButton->setEnabled(true);
}
- downloadButton->setEnabled(true);
+ reply->deleteLater();
+ reply = 0;
delete file;
file = 0;
}
-void HttpWindow::readResponseHeader(const QHttpResponseHeader &responseHeader)
+void HttpWindow::httpReadyRead()
{
- 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();
- }
+ // this slot gets called everytime the QNetworkReply has new data.
+ // We read all of its new data and write it into the file.
+ // That way we use less RAM than when reading it at the finished()
+ // signal of the QNetworkReply
+ if (file)
+ file->write(reply->readAll());
}
-void HttpWindow::updateDataReadProgress(int bytesRead, int totalBytes)
+void HttpWindow::updateDataReadProgress(qint64 bytesRead, qint64 totalBytes)
{
if (httpRequestAborted)
return;
@@ -229,14 +229,19 @@
downloadButton->setEnabled(!urlLineEdit->text().isEmpty());
}
-void HttpWindow::slotAuthenticationRequired(const QString &hostName, quint16, QAuthenticator *authenticator)
+void HttpWindow::slotAuthenticationRequired(QNetworkReply*,QAuthenticator *authenticator)
{
QDialog dlg;
Ui::Dialog ui;
ui.setupUi(&dlg);
dlg.adjustSize();
- ui.siteDescription->setText(tr("%1 at %2").arg(authenticator->realm()).arg(hostName));
-
+ ui.siteDescription->setText(tr("%1 at %2").arg(authenticator->realm()).arg(url.host()));
+
+ // Did the URL have information? Fill the UI
+ // This is only relevant if the URL-supplied credentials were wrong
+ ui.userEdit->setText(url.userName());
+ ui.passwordEdit->setText(url.password());
+
if (dlg.exec() == QDialog::Accepted) {
authenticator->setUser(ui.userEdit->text());
authenticator->setPassword(ui.passwordEdit->text());
@@ -244,7 +249,7 @@
}
#ifndef QT_NO_OPENSSL
-void HttpWindow::sslErrors(const QList<QSslError> &errors)
+void HttpWindow::sslErrors(QNetworkReply*,const QList<QSslError> &errors)
{
QString errorString;
foreach (const QSslError &error, errors) {
@@ -253,10 +258,10 @@
errorString += error.errorString();
}
- if (QMessageBox::warning(this, tr("HTTP Example"),
+ if (QMessageBox::warning(this, tr("HTTP"),
tr("One or more SSL errors has occurred: %1").arg(errorString),
QMessageBox::Ignore | QMessageBox::Abort) == QMessageBox::Ignore) {
- http->ignoreSslErrors();
+ reply->ignoreSslErrors();
}
}
#endif