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Use HttpMetaCache to minimize network use.

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This commit is contained in:
Petr Mrázek
2013-09-08 02:15:20 +02:00
parent 6892c11e9f
commit 6bea4ec988
17 changed files with 698 additions and 274 deletions
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95
logic/net/DownloadJob.h
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@ -1,98 +1,28 @@
#pragma once
#include <QtNetwork>
#include "Download.h"
#include "ByteArrayDownload.h"
#include "FileDownload.h"
#include "CacheDownload.h"
#include "HttpMetaCache.h"
class DownloadJob;
class Download;
typedef QSharedPointer<DownloadJob> DownloadJobPtr;
typedef QSharedPointer<Download> DownloadPtr;
enum JobStatus
{
Job_NotStarted,
Job_InProgress,
Job_Finished,
Job_Failed
};
class Job : public QObject
{
Q_OBJECT
protected:
explicit Job(): QObject(0){};
public:
virtual ~Job() {};
public slots:
virtual void start() = 0;
};
class Download: public Job
{
friend class DownloadJob;
Q_OBJECT
protected:
Download(QUrl url, QString rel_target_path = QString(), QString expected_md5 = QString());
public:
/// the network reply
QSharedPointer<QNetworkReply> m_reply;
/// source URL
QUrl m_url;
/// if true, check the md5sum against a provided md5sum
/// also, if a file exists, perform an md5sum first and don't download only if they don't match
bool m_check_md5;
/// the expected md5 checksum
QString m_expected_md5;
/// save to file?
bool m_save_to_file;
/// is the saving file already open?
bool m_opened_for_saving;
/// if saving to file, use the one specified in this string
QString m_target_path;
/// this is the output file, if any
QFile m_output_file;
/// if not saving to file, downloaded data is placed here
QByteArray m_data;
int currentProgress = 0;
int totalProgress = 0;
/// The file's status
JobStatus m_status;
int index_within_job = 0;
signals:
void started(int index);
void progress(int index, qint64 current, qint64 total);
void succeeded(int index);
void failed(int index);
public slots:
virtual void start();
private slots:
void downloadProgress(qint64 bytesReceived, qint64 bytesTotal);;
void downloadError(QNetworkReply::NetworkError error);
void downloadFinished();
void downloadReadyRead();
};
/**
* A single file for the downloader/cache to process.
*/
class DownloadJob : public Job
class DownloadJob : public QObject
{
Q_OBJECT
public:
explicit DownloadJob()
:Job(){};
explicit DownloadJob(QUrl url, QString rel_target_path = QString(), QString expected_md5 = QString())
:Job()
{
add(url, rel_target_path, expected_md5);
};
explicit DownloadJob(QString job_name)
:QObject(), m_job_name(job_name){};
ByteArrayDownloadPtr add(QUrl url);
FileDownloadPtr add(QUrl url, QString rel_target_path);
CacheDownloadPtr add(QUrl url, MetaEntryPtr entry);
DownloadPtr add(QUrl url, QString rel_target_path = QString(), QString expected_md5 = QString());
DownloadPtr operator[](int index)
{
return downloads[index];
@ -119,6 +49,7 @@ private slots:
void partSucceeded(int index);
void partFailed(int index);
private:
QString m_job_name;
QList<DownloadPtr> downloads;
int num_succeeded = 0;
int num_failed = 0;