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
|
/*
* filedownloader.cpp
*
* Created on: Mar 7, 2014
* Author: nils
*/
#include <QFileInfo>
#include "filedownloader.h"
// Maximum size of download
#define MAXSIZE (200000)
static QNetworkAccessManager m_WebCtrl;
FileDownloader::FileDownloader(const QUrl& fileUrl, QObject *parent) :
QObject(parent), started(false), url(fileUrl) {
}
FileDownloader::~FileDownloader() {
}
bool FileDownloader::downloadFile() {
if (this->started)
return true;
QNetworkRequest request(this->url);
request.setAttribute(QNetworkRequest::FollowRedirectsAttribute, true);
QNetworkReply *reply = m_WebCtrl.get(request);
if (reply == nullptr)
return false;
this->started = true;
connect(reply, SIGNAL(finished()), SLOT(fileDownloaded()));
connect(reply, SIGNAL(downloadProgress(qint64, qint64)), SLOT(downloadProgress(qint64, qint64)));
return true;
}
/*
* Slots from networkreply
*/
void FileDownloader::downloadFailed(QNetworkReply::NetworkError) {
QNetworkReply *reply = reinterpret_cast<QNetworkReply*>(this->sender());
killReply(reply);
emit downloaded(this->url, QByteArray());
}
void FileDownloader::fileDownloaded() {
QNetworkReply *reply = reinterpret_cast<QNetworkReply*>(this->sender());
if (reply == nullptr)
return;
QByteArray downloadedData(reply->readAll());
killReply(reply);
//emit a signal
emit downloaded(this->url, downloadedData);
}
void FileDownloader::downloadProgress(qint64 received, qint64 totalSize) {
QNetworkReply *reply = reinterpret_cast<QNetworkReply*>(this->sender());
if (reply == nullptr)
return;
if (received > MAXSIZE || totalSize > MAXSIZE) {
killReply(reply);
emit downloaded(this->url, QByteArray());
}
}
void FileDownloader::killReply(QNetworkReply *reply) {
if (reply == nullptr)
return;
reply->blockSignals(true);
reply->abort();
reply->deleteLater();
}
|
