1 files changed, 126 insertions, 0 deletions
diff --git a/examples/network/rsslisting/rsslisting.cpp b/examples/network/rsslisting/rsslisting.cpp
new file mode 100644
index 0000000000..ed7c163c76
--- /dev/null
+++ b/examples/network/rsslisting/rsslisting.cpp
@@ -0,0 +1,126 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "rsslisting.h"
+
+#include <QtCore>
+#include <QtWidgets>
+#include <QtNetwork>
+
+//! [setup]
+RSSListing::RSSListing(const QString &url, QWidget *parent)
+    : QWidget(parent), currentReply(0)
+{
+    connect(&manager, &QNetworkAccessManager::finished, this, &RSSListing::finished);
+
+    lineEdit = new QLineEdit(this);
+    lineEdit->setText(url);
+    connect(lineEdit, &QLineEdit::returnPressed, this, &RSSListing::fetch);
+
+    fetchButton = new QPushButton(tr("Fetch"), this);
+    connect(fetchButton, &QPushButton::clicked, this, &RSSListing::fetch);
+
+    treeWidget = new QTreeWidget(this);
+    connect(treeWidget, &QTreeWidget::itemActivated,
+            // Open the link in the browser:
+            this, [](QTreeWidgetItem *item) { QDesktopServices::openUrl(QUrl(item->text(1))); });
+    treeWidget->setHeaderLabels(QStringList { tr("Title"), tr("Link") });
+    treeWidget->header()->setSectionResizeMode(QHeaderView::ResizeToContents);
+
+    QHBoxLayout *hboxLayout = new QHBoxLayout;
+    hboxLayout->addWidget(lineEdit);
+    hboxLayout->addWidget(fetchButton);
+
+    QVBoxLayout *layout = new QVBoxLayout(this);
+    layout->addLayout(hboxLayout);
+    layout->addWidget(treeWidget);
+
+    setWindowTitle(tr("RSS listing example"));
+    resize(640, 480);
+}
+//! [setup]
+
+//! [slots]
+void RSSListing::fetch()
+{
+    lineEdit->setReadOnly(true);
+    fetchButton->setEnabled(false);
+    treeWidget->clear();
+
+    get(QUrl(lineEdit->text()));
+}
+
+void RSSListing::consumeData()
+{
+    int statusCode = currentReply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
+    if (statusCode >= 200 && statusCode < 300)
+        parseXml();
+}
+
+void RSSListing::error(QNetworkReply::NetworkError)
+{
+    qWarning("error retrieving RSS feed");
+    xml.clear();
+    currentReply->disconnect(this);
+    currentReply->deleteLater();
+    currentReply = nullptr;
+}
+
+void RSSListing::finished(QNetworkReply *reply)
+{
+    Q_UNUSED(reply);
+    lineEdit->setReadOnly(false);
+    fetchButton->setEnabled(true);
+}
+//! [slots]
+
+// Private methods
+
+//! [get]
+void RSSListing::get(const QUrl &url)
+{
+    if (currentReply) {
+        currentReply->disconnect(this);
+        currentReply->deleteLater();
+    }
+    currentReply = url.isValid() ? manager.get(QNetworkRequest(url)) : nullptr;
+    if (currentReply) {
+        connect(currentReply, &QNetworkReply::readyRead, this, &RSSListing::consumeData);
+        connect(currentReply, &QNetworkReply::errorOccurred, this, &RSSListing::error);
+
+    }
+    xml.setDevice(currentReply); // Equivalent to clear() if currentReply is null.
+}
+//! [get]
+
+// TODO: this is a candidate for showing how to use coroutines, once available.
+//! [parse]
+void RSSListing::parseXml()
+{
+    while (!xml.atEnd()) {
+        xml.readNext();
+        if (xml.isStartElement()) {
+            if (xml.name() == u"item") {
+                linkString = xml.attributes().value("rss:about").toString();
+                titleString.clear();
+            }
+            currentTag = xml.name().toString();
+        } else if (xml.isEndElement()) {
+            if (xml.name() == u"item") {
+
+                QTreeWidgetItem *item = new QTreeWidgetItem;
+                item->setText(0, titleString);
+                item->setText(1, linkString);
+                treeWidget->addTopLevelItem(item);
+            }
+        } else if (xml.isCharacters() && !xml.isWhitespace()) {
+            if (currentTag == "title")
+                titleString += xml.text();
+            else if (currentTag == "link")
+                linkString += xml.text();
+        }
+    }
+    if (xml.error() && xml.error() != QXmlStreamReader::PrematureEndOfDocumentError)
+        qWarning() << "XML ERROR:" << xml.lineNumber() << ": " << xml.errorString();
+}
+//! [parse]