NOISSUE refactor *Download into more, smaller pieces

* Download is now Download.
* Download uses Sink subclasses to process various events.
* Validators can be used to further customize the Sink behaviour.

1 files changed, 59 insertions, 0 deletions

diff --git a/api/logic/net/MetaCacheSink.cpp b/api/logic/net/MetaCacheSink.cpp
new file mode 100644
index 00000000..539b4bb3
--- /dev/null
+++ b/api/logic/net/MetaCacheSink.cpp
@@ -0,0 +1,59 @@
+#include "MetaCacheSink.h"
+#include <QFile>
+#include <QFileInfo>
+#include "Env.h"
+#include "FileSystem.h"
+
+namespace Net {
+
+MetaCacheSink::MetaCacheSink(MetaEntryPtr entry, ChecksumValidator * md5sum)
+	:Net::FileSink(entry->getFullPath()), m_entry(entry), m_md5Node(md5sum)
+{
+	addValidator(md5sum);
+};
+
+MetaCacheSink::~MetaCacheSink()
+{
+	// nil
+};
+
+JobStatus MetaCacheSink::initCache(QNetworkRequest& request)
+{
+	if (!m_entry->isStale())
+	{
+		return Job_Finished;
+	}
+	// check if file exists, if it does, use its information for the request
+	QFile current(m_filename);
+	if(current.exists() && current.size() != 0)
+	{
+		if (m_entry->getRemoteChangedTimestamp().size())
+		{
+			request.setRawHeader(QString("If-Modified-Since").toLatin1(), m_entry->getRemoteChangedTimestamp().toLatin1());
+		}
+		if (m_entry->getETag().size())
+		{
+			request.setRawHeader(QString("If-None-Match").toLatin1(), m_entry->getETag().toLatin1());
+		}
+	}
+	return Job_InProgress;
+}
+
+JobStatus MetaCacheSink::finalizeCache(QNetworkReply & reply)
+{
+	QFileInfo output_file_info(m_filename);
+	if(wroteAnyData)
+	{
+		m_entry->setMD5Sum(m_md5Node->hash().toHex().constData());
+	}
+	m_entry->setETag(reply.rawHeader("ETag").constData());
+	if (reply.hasRawHeader("Last-Modified"))
+	{
+		m_entry->setRemoteChangedTimestamp(reply.rawHeader("Last-Modified").constData());
+	}
+	m_entry->setLocalChangedTimestamp(output_file_info.lastModified().toUTC().toMSecsSinceEpoch());
+	m_entry->setStale(false);
+	ENV.metacache()->updateEntry(m_entry);
+	return Job_Finished;
+}
+}