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#include "httpwindow.h"
#if QT_VERSION >= 0x050000
# include <QtWidgets>
#else
# include <QtGui>
#endif
#include <QtNetwork>
#include <QNetworkAccessManager>
QString HttpWindow::lastUrl;
HttpWindow::HttpWindow(QWidget *parent, bool reload)
: QDialog(parent)
{
setModal(true);
progressDialog = new QProgressDialog(this);
progressDialog->setMinimumDuration(1000); // msec
urlLineEdit = new QLineEdit(lastUrl);
urlLabel = new QLabel(tr("&URL:"));
urlLabel->setBuddy(urlLineEdit);
statusLabel = new QLabel(tr("Please enter the URL of a csa file"));
quitButton = new QPushButton(tr("Cancel"));
downloadButton = new QPushButton(tr("Open"));
downloadButton->setDefault(true);
http = new QNetworkAccessManager(this);
connect(http, SIGNAL(finished(QNetworkReply*)),
this, SLOT(httpRequestFinished(QNetworkReply*)));
connect(urlLineEdit, SIGNAL(textChanged(const QString &)),
this, SLOT(enableDownloadButton()));
connect(downloadButton, SIGNAL(clicked()), this, SLOT(downloadFile()));
connect(quitButton, SIGNAL(clicked()), this, SLOT(reject()));
QHBoxLayout *topLayout = new QHBoxLayout;
topLayout->addWidget(urlLabel);
topLayout->addWidget(urlLineEdit);
QHBoxLayout *buttonLayout = new QHBoxLayout;
buttonLayout->addStretch(1);
buttonLayout->addWidget(downloadButton);
buttonLayout->addWidget(quitButton);
QVBoxLayout *mainLayout = new QVBoxLayout;
mainLayout->addLayout(topLayout);
mainLayout->addWidget(statusLabel);
mainLayout->addLayout(buttonLayout);
setLayout(mainLayout);
setWindowTitle(tr("HTTP"));
const QClipboard *clipboard = QApplication::clipboard();
const QString text = clipboard->text();
if (!text.isEmpty())
{
urlLineEdit->setText(text);
}
urlLineEdit->setFocus();
if (reload)
downloadFile();
}
void HttpWindow::downloadFile()
{
httpRequestAborted = false;
const QUrl url(urlLineEdit->text());
lastUrl = url.toString();
QFileInfo fileInfo(url.path());
fileName = fileInfo.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;
}
progressDialog->setWindowTitle(tr("HTTP"));
progressDialog->setLabelText(tr("Downloading %1.").arg(fileName));
progressDialog->setWindowModality(Qt::WindowModal);
downloadButton->setEnabled(false);
QNetworkRequest request(url);
reply = http->get(request);
connect(reply, SIGNAL(downloadProgress (qint64, qint64)),
this, SLOT(updateDataReadProgress(qint64, qint64)));
connect(progressDialog, SIGNAL(canceled()), this, SLOT(cancelDownload()));
}
void HttpWindow::cancelDownload()
{
statusLabel->setText(tr("Download canceled."));
httpRequestAborted = true;
reply->abort();
downloadButton->setEnabled(true);
reject();
}
void HttpWindow::httpRequestFinished(QNetworkReply *reply)
{
if (httpRequestAborted ||
reply->error() != QNetworkReply::NoError) {
if (file) {
file->close();
file->remove();
delete file;
file = 0;
}
QMessageBox::information(this, tr("HTTP"),
tr("Download failed: %1.")
.arg(reply->error()));
reject();
} else {
QTextStream out(file);
out << reply->readAll();
file->close();
delete file;
file = 0;
QString fileName = QFileInfo(QUrl(urlLineEdit->text()).path()).fileName();
statusLabel->setText(tr("Downloaded %1 to current directory.").arg(fileName));
downloadButton->setEnabled(true);
accept();
}
reply->deleteLater();
}
void HttpWindow::updateDataReadProgress(qint64 bytesRead, qint64 totalBytes)
{
if (httpRequestAborted)
return;
progressDialog->setMaximum(totalBytes);
progressDialog->setValue(bytesRead);
}
void HttpWindow::enableDownloadButton()
{
downloadButton->setEnabled(!urlLineEdit->text().isEmpty());
}
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