1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
#include "include/dlqueue.h"
DownloadJob::DownloadJob ( QUrl url, QString rel_target_path, QString expected_md5 )
:Job()
{
m_url = url;
m_rel_target_path = rel_target_path;
m_expected_md5 = expected_md5;
m_check_md5 = m_expected_md5.size();
m_save_to_file = m_rel_target_path.size();
m_status = Job_NotStarted;
}
JobPtr DownloadJob::create ( QUrl url, QString rel_target_path, QString expected_md5 )
{
return JobPtr ( new DownloadJob ( url, rel_target_path, expected_md5 ) );
}
void DownloadJob::start()
{
m_manager.reset ( new QNetworkAccessManager() );
if ( m_save_to_file )
{
QString filename = m_rel_target_path;
m_output_file.setFileName ( filename );
// if there already is a file and md5 checking is in effect
if ( m_output_file.exists() && m_check_md5 )
{
// and it can be opened
if ( m_output_file.open ( QIODevice::ReadOnly ) )
{
// check the md5 against the expected one
QString hash = QCryptographicHash::hash ( m_output_file.readAll(), QCryptographicHash::Md5 ).toHex().constData();
m_output_file.close();
// skip this file if they match
if ( hash == m_expected_md5 )
{
qDebug() << "Skipping " << m_url.toString() << ": md5 match.";
emit finish();
return;
}
}
}
QFileInfo a ( filename );
QDir dir;
if ( !dir.mkpath ( a.path() ) )
{
/*
* error when making the folder structure
*/
emit fail();
return;
}
if ( !m_output_file.open ( QIODevice::WriteOnly ) )
{
/*
* Can't open the file... the job failed
*/
emit fail();
return;
}
}
qDebug() << "Downloading " << m_url.toString();
QNetworkRequest request ( m_url );
QNetworkReply * rep = m_manager->get ( request );
m_reply = QSharedPointer<QNetworkReply> ( rep, &QObject::deleteLater );
connect ( rep, SIGNAL ( downloadProgress ( qint64,qint64 ) ), SLOT ( downloadProgress ( qint64,qint64 ) ) );
connect ( rep, SIGNAL ( finished() ), SLOT ( downloadFinished() ) );
connect ( rep, SIGNAL ( error ( QNetworkReply::NetworkError ) ), SLOT ( downloadError ( QNetworkReply::NetworkError ) ) );
connect ( rep, SIGNAL ( readyRead() ), SLOT ( downloadReadyRead() ) );
}
void DownloadJob::downloadProgress ( qint64 bytesReceived, qint64 bytesTotal )
{
emit progress ( bytesReceived, bytesTotal );
}
void DownloadJob::downloadError ( QNetworkReply::NetworkError error )
{
// error happened during download.
// TODO: log the reason why
m_status = Job_Failed;
}
void DownloadJob::downloadFinished()
{
// if the download succeeded
if ( m_status != Job_Failed )
{
// nothing went wrong...
m_status = Job_Finished;
// save the data to the downloadable if we aren't saving to file
if ( !m_save_to_file )
{
m_data = m_reply->readAll();
}
else
{
m_output_file.close();
}
//TODO: check md5 here!
m_reply.clear();
emit finish();
return;
}
// else the download failed
else
{
if ( m_save_to_file )
{
m_output_file.close();
m_output_file.remove();
}
m_reply.clear();
emit fail();
return;
}
}
void DownloadJob::downloadReadyRead()
{
if ( m_save_to_file )
{
m_output_file.write ( m_reply->readAll() );
}
}
|