From 5006fddd33c32eb972f1bdc6b72acc43a3741e23 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A5rten=20Nordheim?= <marten.nordheim@qt.io>
Date: Wed, 11 Jan 2023 18:19:39 +0100
Subject: [PATCH] HTTP Example: Add proxy handling

If a proxy is configured on the system then we will request credentials
if needed.

Task-number: QTBUG-108874
Fixes: QTBUG-106245
Pick-to: 6.5
Change-Id: Icbea491492cde4634421b1a1e722a3768d56dec8
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
---
 examples/network/http/httpwindow.cpp | 26 ++++++++++++++++++++++++++
 examples/network/http/httpwindow.h   |  6 ++++++
 2 files changed, 32 insertions(+)

diff --git a/examples/network/http/httpwindow.cpp b/examples/network/http/httpwindow.cpp
index 854873e574..f34bae0322 100644
--- a/examples/network/http/httpwindow.cpp
+++ b/examples/network/http/httpwindow.cpp
@@ -51,6 +51,10 @@ HttpWindow::HttpWindow(QWidget *parent)
     connect(&qnam, &QNetworkAccessManager::authenticationRequired,
             this, &HttpWindow::slotAuthenticationRequired);
     //! [qnam-auth-required-1]
+#if QT_CONFIG(networkproxy)
+    connect(&qnam, &QNetworkAccessManager::proxyAuthenticationRequired,
+            this, &HttpWindow::slotProxyAuthenticationRequired);
+#endif
 
     QFormLayout *formLayout = new QFormLayout;
     urlLineEdit->setClearButtonEnabled(true);
@@ -277,3 +281,25 @@ void HttpWindow::sslErrors(const QList<QSslError> &errors)
 }
 //! [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
diff --git a/examples/network/http/httpwindow.h b/examples/network/http/httpwindow.h
index 64e9274288..ade0635e48 100644
--- a/examples/network/http/httpwindow.h
+++ b/examples/network/http/httpwindow.h
@@ -19,6 +19,9 @@ class QSslError;
 class QAuthenticator;
 class QNetworkReply;
 class QCheckBox;
+#if QT_CONFIG(networkproxy)
+class QNetworkProxy;
+#endif
 
 QT_END_NAMESPACE
 
@@ -52,6 +55,9 @@ private slots:
 #if QT_CONFIG(ssl)
     void sslErrors(const QList<QSslError> &errors);
 #endif
+#if QT_CONFIG(networkproxy)
+    void slotProxyAuthenticationRequired(const QNetworkProxy &proxy, QAuthenticator *authenticator);
+#endif
 
 private:
     std::unique_ptr<QFile> openFileForWrite(const QString &fileName);