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-rw-r--r--examples/network/http/httpwindow.cpp218
1 files changed, 91 insertions, 127 deletions
diff --git a/examples/network/http/httpwindow.cpp b/examples/network/http/httpwindow.cpp
index c7bf0c0dff..72f130734b 100644
--- a/examples/network/http/httpwindow.cpp
+++ b/examples/network/http/httpwindow.cpp
@@ -1,52 +1,5 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-** * Redistributions of source code must retain the above copyright
-** notice, this list of conditions and the following disclaimer.
-** * Redistributions in binary form must reproduce the above copyright
-** notice, this list of conditions and the following disclaimer in
-** the documentation and/or other materials provided with the
-** distribution.
-** * Neither the name of The Qt Company Ltd nor the names of its
-** contributors may be used to endorse or promote products derived
-** from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "httpwindow.h"
@@ -56,6 +9,9 @@
#include <QtNetwork>
#include <QUrl>
+#include <algorithm>
+#include <memory>
+
#if QT_CONFIG(ssl)
const char defaultUrl[] = "https://www.qt.io/";
#else
@@ -67,7 +23,6 @@ ProgressDialog::ProgressDialog(const QUrl &url, QWidget *parent)
: QProgressDialog(parent)
{
setWindowTitle(tr("Download Progress"));
- setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
setLabelText(tr("Downloading %1.").arg(url.toDisplayString()));
setMinimum(0);
setValue(0);
@@ -75,10 +30,6 @@ ProgressDialog::ProgressDialog(const QUrl &url, QWidget *parent)
setMinimumSize(QSize(400, 75));
}
-ProgressDialog::~ProgressDialog()
-{
-}
-
void ProgressDialog::networkReplyProgress(qint64 bytesRead, qint64 totalBytes)
{
setMaximum(totalBytes);
@@ -90,27 +41,24 @@ HttpWindow::HttpWindow(QWidget *parent)
, statusLabel(new QLabel(tr("Please enter the URL of a file you want to download.\n\n"), this))
, urlLineEdit(new QLineEdit(defaultUrl))
, downloadButton(new QPushButton(tr("Download")))
- , launchCheckBox(new QCheckBox("Launch file"))
+ , launchCheckBox(new QCheckBox(tr("Launch file")))
, defaultFileLineEdit(new QLineEdit(defaultFileName))
, downloadDirectoryLineEdit(new QLineEdit)
- , reply(nullptr)
- , file(nullptr)
- , httpRequestAborted(false)
{
- setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
- setWindowTitle(tr("HTTP"));
+ setWindowTitle(tr("HTTP Client"));
+ //! [qnam-auth-required-1]
connect(&qnam, &QNetworkAccessManager::authenticationRequired,
this, &HttpWindow::slotAuthenticationRequired);
-#ifndef QT_NO_SSL
- connect(&qnam, &QNetworkAccessManager::sslErrors,
- this, &HttpWindow::sslErrors);
+ //! [qnam-auth-required-1]
+#if QT_CONFIG(networkproxy)
+ connect(&qnam, &QNetworkAccessManager::proxyAuthenticationRequired,
+ this, &HttpWindow::slotProxyAuthenticationRequired);
#endif
QFormLayout *formLayout = new QFormLayout;
urlLineEdit->setClearButtonEnabled(true);
- connect(urlLineEdit, &QLineEdit::textChanged,
- this, &HttpWindow::enableDownloadButton);
+ connect(urlLineEdit, &QLineEdit::textChanged, this, &HttpWindow::enableDownloadButton);
formLayout->addRow(tr("&URL:"), urlLineEdit);
QString downloadDirectory = QStandardPaths::writableLocation(QStandardPaths::TempLocation);
if (downloadDirectory.isEmpty() || !QFileInfo(downloadDirectory).isDir())
@@ -141,25 +89,34 @@ HttpWindow::HttpWindow(QWidget *parent)
urlLineEdit->setFocus();
}
-
-HttpWindow::~HttpWindow()
-{
-}
+HttpWindow::~HttpWindow() = default;
void HttpWindow::startRequest(const QUrl &requestedUrl)
{
url = requestedUrl;
httpRequestAborted = false;
- reply = qnam.get(QNetworkRequest(url));
- connect(reply, &QNetworkReply::finished, this, &HttpWindow::httpFinished);
- connect(reply, &QIODevice::readyRead, this, &HttpWindow::httpReadyRead);
+ //! [qnam-download]
+ reply.reset(qnam.get(QNetworkRequest(url)));
+ //! [qnam-download]
+ //! [connecting-reply-to-slots]
+ connect(reply.get(), &QNetworkReply::finished, this, &HttpWindow::httpFinished);
+ //! [networkreply-readyread-1]
+ connect(reply.get(), &QIODevice::readyRead, this, &HttpWindow::httpReadyRead);
+ //! [networkreply-readyread-1]
+#if QT_CONFIG(ssl)
+ //! [sslerrors-1]
+ connect(reply.get(), &QNetworkReply::sslErrors, this, &HttpWindow::sslErrors);
+ //! [sslerrors-1]
+#endif
+ //! [connecting-reply-to-slots]
ProgressDialog *progressDialog = new ProgressDialog(url, this);
progressDialog->setAttribute(Qt::WA_DeleteOnClose);
connect(progressDialog, &QProgressDialog::canceled, this, &HttpWindow::cancelDownload);
- connect(reply, &QNetworkReply::downloadProgress, progressDialog, &ProgressDialog::networkReplyProgress);
- connect(reply, &QNetworkReply::finished, progressDialog, &ProgressDialog::hide);
+ connect(reply.get(), &QNetworkReply::downloadProgress,
+ progressDialog, &ProgressDialog::networkReplyProgress);
+ connect(reply.get(), &QNetworkReply::finished, progressDialog, &ProgressDialog::hide);
progressDialog->show();
statusLabel->setText(tr("Downloading %1...").arg(url.toString()));
@@ -187,19 +144,18 @@ void HttpWindow::downloadFile()
bool useDirectory = !downloadDirectory.isEmpty() && QFileInfo(downloadDirectory).isDir();
if (useDirectory)
fileName.prepend(downloadDirectory + '/');
+
if (QFile::exists(fileName)) {
- if (QMessageBox::question(this, tr("Overwrite Existing File"),
- tr("There already exists a file called %1%2."
- " Overwrite?")
- .arg(fileName,
- useDirectory
- ? QString()
- : QStringLiteral(" in the current directory")),
- QMessageBox::Yes | QMessageBox::No,
- QMessageBox::No)
- == QMessageBox::No) {
+ QString alreadyExists = useDirectory
+ ? tr("There already exists a file called %1. Overwrite?")
+ : tr("There already exists a file called %1 in the current directory. "
+ "Overwrite?");
+ QMessageBox::StandardButton response = QMessageBox::question(this,
+ tr("Overwrite Existing File"),
+ alreadyExists.arg(QDir::toNativeSeparators(fileName)),
+ QMessageBox::Yes | QMessageBox::No, QMessageBox::No);
+ if (response == QMessageBox::No)
return;
- }
QFile::remove(fileName);
}
@@ -215,7 +171,7 @@ void HttpWindow::downloadFile()
std::unique_ptr<QFile> HttpWindow::openFileForWrite(const QString &fileName)
{
- std::unique_ptr<QFile> file(new QFile(fileName));
+ std::unique_ptr<QFile> file = std::make_unique<QFile>(fileName);
if (!file->open(QIODevice::WriteOnly)) {
QMessageBox::information(this, tr("Error"),
tr("Unable to save the file %1: %2.")
@@ -243,67 +199,49 @@ void HttpWindow::httpFinished()
file.reset();
}
- if (httpRequestAborted) {
- reply->deleteLater();
- reply = nullptr;
- return;
- }
-
- if (reply->error()) {
+ //! [networkreply-error-handling-1]
+ QNetworkReply::NetworkError error = reply->error();
+ const QString &errorString = reply->errorString();
+ //! [networkreply-error-handling-1]
+ reply.reset();
+ //! [networkreply-error-handling-2]
+ if (error != QNetworkReply::NoError) {
QFile::remove(fi.absoluteFilePath());
- statusLabel->setText(tr("Download failed:\n%1.").arg(reply->errorString()));
- downloadButton->setEnabled(true);
- reply->deleteLater();
- reply = nullptr;
- return;
- }
-
- const QVariant redirectionTarget = reply->attribute(QNetworkRequest::RedirectionTargetAttribute);
-
- reply->deleteLater();
- reply = nullptr;
-
- if (!redirectionTarget.isNull()) {
- const QUrl redirectedUrl = url.resolved(redirectionTarget.toUrl());
- if (QMessageBox::question(this, tr("Redirect"),
- tr("Redirect to %1 ?").arg(redirectedUrl.toString()),
- QMessageBox::Yes | QMessageBox::No) == QMessageBox::No) {
- QFile::remove(fi.absoluteFilePath());
+ // For "request aborted" we handle the label and button in cancelDownload()
+ if (!httpRequestAborted) {
+ statusLabel->setText(tr("Download failed:\n%1.").arg(errorString));
downloadButton->setEnabled(true);
- statusLabel->setText(tr("Download failed:\nRedirect rejected."));
- return;
}
- file = openFileForWrite(fi.absoluteFilePath());
- if (!file) {
- downloadButton->setEnabled(true);
- return;
- }
- startRequest(redirectedUrl);
return;
}
+ //! [networkreply-error-handling-2]
statusLabel->setText(tr("Downloaded %1 bytes to %2\nin\n%3")
- .arg(fi.size()).arg(fi.fileName(), QDir::toNativeSeparators(fi.absolutePath())));
+ .arg(fi.size())
+ .arg(fi.fileName(), QDir::toNativeSeparators(fi.absolutePath())));
if (launchCheckBox->isChecked())
QDesktopServices::openUrl(QUrl::fromLocalFile(fi.absoluteFilePath()));
downloadButton->setEnabled(true);
}
+//! [networkreply-readyread-2]
void HttpWindow::httpReadyRead()
{
- // this slot gets called every time the QNetworkReply has new data.
+ // This slot gets called every time 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());
}
+//! [networkreply-readyread-2]
void HttpWindow::enableDownloadButton()
{
downloadButton->setEnabled(!urlLineEdit->text().isEmpty());
}
+//! [qnam-auth-required-2]
void HttpWindow::slotAuthenticationRequired(QNetworkReply *, QAuthenticator *authenticator)
{
QDialog authenticationDialog;
@@ -312,7 +250,7 @@ void HttpWindow::slotAuthenticationRequired(QNetworkReply *, QAuthenticator *aut
authenticationDialog.adjustSize();
ui.siteDescription->setText(tr("%1 at %2").arg(authenticator->realm(), url.host()));
- // Did the URL have information? Fill the UI
+ // 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());
@@ -322,9 +260,11 @@ void HttpWindow::slotAuthenticationRequired(QNetworkReply *, QAuthenticator *aut
authenticator->setPassword(ui.passwordEdit->text());
}
}
+//! [qnam-auth-required-2]
-#ifndef QT_NO_SSL
-void HttpWindow::sslErrors(QNetworkReply *, const QList<QSslError> &errors)
+#if QT_CONFIG(ssl)
+//! [sslerrors-2]
+void HttpWindow::sslErrors(const QList<QSslError> &errors)
{
QString errorString;
for (const QSslError &error : errors) {
@@ -333,10 +273,34 @@ void HttpWindow::sslErrors(QNetworkReply *, const QList<QSslError> &errors)
errorString += error.errorString();
}
- if (QMessageBox::warning(this, tr("SSL Errors"),
- tr("One or more SSL errors has occurred:\n%1").arg(errorString),
- QMessageBox::Ignore | QMessageBox::Abort) == QMessageBox::Ignore) {
+ if (QMessageBox::warning(this, tr("TLS Errors"),
+ tr("One or more TLS errors has occurred:\n%1").arg(errorString),
+ QMessageBox::Ignore | QMessageBox::Abort)
+ == QMessageBox::Ignore) {
reply->ignoreSslErrors();
}
}
+//! [sslerrors-2]
+#endif
+
+#if QT_CONFIG(networkproxy)
+void HttpWindow::slotProxyAuthenticationRequired(const QNetworkProxy &proxy, QAuthenticator *authenticator)
+{
+ QDialog authenticationDialog;
+ Ui::Dialog ui;
+ ui.setupUi(&authenticationDialog);
+ authenticationDialog.adjustSize();
+ ui.siteDescription->setText(tr("A network proxy at %1 is requesting credentials for realm: %2")
+ .arg(proxy.hostName(), authenticator->realm()));
+
+ // If the user passed credentials in the URL to http_proxy or similar they may be available to
+ // us. Otherwise this will just leave the fields empty
+ ui.userEdit->setText(proxy.user());
+ ui.passwordEdit->setText(proxy.password());
+
+ if (authenticationDialog.exec() == QDialog::Accepted) {
+ authenticator->setUser(ui.userEdit->text());
+ authenticator->setPassword(ui.passwordEdit->text());
+ }
+}
#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-24 19:36:21 +0000