116 lines
2.8 KiB
C++
116 lines
2.8 KiB
C++
#include "FileSink.h"
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#include <QFile>
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#include <QFileInfo>
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#include "Env.h"
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#include "FileSystem.h"
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namespace Net {
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FileSink::FileSink(QString filename)
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:m_filename(filename)
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{
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// nil
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}
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FileSink::~FileSink()
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{
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// nil
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}
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JobStatus FileSink::init(QNetworkRequest& request)
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{
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auto result = initCache(request);
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if(result != Job_InProgress)
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{
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return result;
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}
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// create a new save file and open it for writing
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if (!FS::ensureFilePathExists(m_filename))
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{
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qCritical() << "Could not create folder for " + m_filename;
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return Job_Failed;
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}
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wroteAnyData = false;
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m_output_file.reset(new QSaveFile(m_filename));
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if (!m_output_file->open(QIODevice::WriteOnly))
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{
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qCritical() << "Could not open " + m_filename + " for writing";
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return Job_Failed;
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}
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if(initAllValidators(request))
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return Job_InProgress;
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return Job_Failed;
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}
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JobStatus FileSink::initCache(QNetworkRequest &)
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{
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return Job_InProgress;
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}
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JobStatus FileSink::write(QByteArray& data)
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{
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if (!writeAllValidators(data) || m_output_file->write(data) != data.size())
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{
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qCritical() << "Failed writing into " + m_filename;
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m_output_file->cancelWriting();
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m_output_file.reset();
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wroteAnyData = false;
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return Job_Failed;
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}
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wroteAnyData = true;
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return Job_InProgress;
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}
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JobStatus FileSink::abort()
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{
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m_output_file->cancelWriting();
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failAllValidators();
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return Job_Failed;
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}
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JobStatus FileSink::finalize(QNetworkReply& reply)
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{
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bool gotFile = false;
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QVariant statusCodeV = reply.attribute(QNetworkRequest::HttpStatusCodeAttribute);
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bool validStatus = false;
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int statusCode = statusCodeV.toInt(&validStatus);
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if(validStatus)
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{
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// this leaves out 304 Not Modified
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gotFile = statusCode == 200 || statusCode == 203;
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}
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// if we wrote any data to the save file, we try to commit the data to the real file.
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// if it actually got a proper file, we write it even if it was empty
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if (gotFile || wroteAnyData)
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{
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// ask validators for data consistency
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// we only do this for actual downloads, not 'your data is still the same' cache hits
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if(!finalizeAllValidators(reply))
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return Job_Failed;
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// nothing went wrong...
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if (!m_output_file->commit())
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{
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qCritical() << "Failed to commit changes to " << m_filename;
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m_output_file->cancelWriting();
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return Job_Failed;
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}
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}
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// then get rid of the save file
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m_output_file.reset();
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return finalizeCache(reply);
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}
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JobStatus FileSink::finalizeCache(QNetworkReply &)
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{
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return Job_Finished;
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}
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bool FileSink::hasLocalData()
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{
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QFileInfo info(m_filename);
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return info.exists() && info.size() != 0;
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}
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}
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