Client update implementation

cockatrice/src/update_downloader.cpp

@@ -0,0 +1,66 @@
+#include <QUrl>
+
+#include "update_downloader.h"
+
+UpdateDownloader::UpdateDownloader(QObject *parent) : QObject(parent) {
+    netMan = new QNetworkAccessManager(this);
+}
+
+void UpdateDownloader::beginDownload(QUrl downloadUrl) {
+
+    //Save the original URL because we need it for the filename
+    if (originalUrl.isEmpty())
+        originalUrl = downloadUrl;
+
+    response = netMan->get(QNetworkRequest(downloadUrl));
+    connect(response, SIGNAL(finished()),
+            this, SLOT(fileFinished()));
+    connect(response, SIGNAL(readyRead()),
+            this, SLOT(fileReadyRead()));
+    connect(response, SIGNAL(downloadProgress(qint64, qint64)),
+            this, SLOT(downloadProgress(qint64, qint64)));
+    connect(response, SIGNAL(error(QNetworkReply::NetworkError)),
+            this, SLOT(downloadError(QNetworkReply::NetworkError)));
+}
+
+void UpdateDownloader::downloadError(QNetworkReply::NetworkError) {
+    emit error(response->errorString().toUtf8());
+}
+
+void UpdateDownloader::fileFinished() {
+    //If we finished but there's a redirect, follow it
+    QVariant redirect = response->attribute(QNetworkRequest::RedirectionTargetAttribute);
+    if (!redirect.isNull())
+    {
+        beginDownload(redirect.toUrl());
+        return;
+    }
+
+    //Handle any errors we had
+    if (response->error())
+    {
+        emit error(response->errorString());
+        return;
+    }
+
+    //Work out the file name of the download
+    QString fileName = QDir::temp().path() + QDir::separator() + originalUrl.toString().section('/', -1);
+
+    //Save the build in a temporary directory
+    QFile file(fileName);
+    if (!file.open(QIODevice::WriteOnly)) {
+        emit error("Could not open the file for reading.");
+        return;
+    }
+
+    file.write(response->readAll());
+    file.close();
+
+    //Emit the success signal with a URL to the download file
+    emit downloadSuccessful(QUrl::fromLocalFile(fileName));
+}
+
+void UpdateDownloader::downloadProgress(qint64 bytesRead, qint64 totalBytes) {
+    emit progressMade(bytesRead, totalBytes);
+}
+