-
-
Notifications
You must be signed in to change notification settings - Fork 3k
/
qgsfiledownloader.cpp
201 lines (178 loc) · 5.36 KB
/
qgsfiledownloader.cpp
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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
/***************************************************************************
qgsfiledownloader.cpp
--------------------------------------
Date : November 2016
Copyright : (C) 2016 by Alessandro Pasotti
Email : apasotti at boundlessgeo dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "qgsfiledownloader.h"
#include "qgsnetworkaccessmanager.h"
#include "qgsapplication.h"
#include "qgsauthmanager.h"
#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QNetworkReply>
#ifndef QT_NO_SSL
#include <QSslError>
#endif
QgsFileDownloader::QgsFileDownloader( const QUrl &url, const QString &outputFileName, const QString &authcfg, bool delayStart )
: mUrl( url )
, mDownloadCanceled( false )
{
mFile.setFileName( outputFileName );
mAuthCfg = authcfg;
if ( !delayStart )
startDownload();
}
QgsFileDownloader::~QgsFileDownloader()
{
if ( mReply )
{
mReply->abort();
mReply->deleteLater();
}
}
void QgsFileDownloader::startDownload()
{
QgsNetworkAccessManager *nam = QgsNetworkAccessManager::instance();
QNetworkRequest request( mUrl );
if ( !mAuthCfg.isEmpty() )
{
QgsApplication::authManager()->updateNetworkRequest( request, mAuthCfg );
}
if ( mReply )
{
disconnect( mReply, &QNetworkReply::readyRead, this, &QgsFileDownloader::onReadyRead );
disconnect( mReply, &QNetworkReply::finished, this, &QgsFileDownloader::onFinished );
disconnect( mReply, &QNetworkReply::downloadProgress, this, &QgsFileDownloader::onDownloadProgress );
mReply->abort();
mReply->deleteLater();
}
mReply = nam->get( request );
if ( !mAuthCfg.isEmpty() )
{
QgsApplication::authManager()->updateNetworkReply( mReply, mAuthCfg );
}
connect( mReply, &QNetworkReply::readyRead, this, &QgsFileDownloader::onReadyRead );
connect( mReply, &QNetworkReply::finished, this, &QgsFileDownloader::onFinished );
connect( mReply, &QNetworkReply::downloadProgress, this, &QgsFileDownloader::onDownloadProgress );
connect( nam, &QgsNetworkAccessManager::requestTimedOut, this, &QgsFileDownloader::onRequestTimedOut, Qt::UniqueConnection );
#ifndef QT_NO_SSL
connect( nam, &QgsNetworkAccessManager::sslErrors, this, &QgsFileDownloader::onSslErrors, Qt::UniqueConnection );
#endif
}
void QgsFileDownloader::cancelDownload()
{
mDownloadCanceled = true;
emit downloadCanceled();
onFinished();
}
void QgsFileDownloader::onRequestTimedOut()
{
error( tr( "Network request %1 timed out" ).arg( mUrl.toString() ) );
}
#ifndef QT_NO_SSL
void QgsFileDownloader::onSslErrors( QNetworkReply *reply, const QList<QSslError> &errors )
{
Q_UNUSED( reply );
QStringList errorMessages;
errorMessages << QStringLiteral( "SSL Errors: " );
for ( auto end = errors.size(), i = 0; i != end; ++i )
{
errorMessages << errors[i].errorString();
}
error( errorMessages );
}
#endif
void QgsFileDownloader::error( const QStringList &errorMessages )
{
for ( auto end = errorMessages.size(), i = 0; i != end; ++i )
{
mErrors << errorMessages[i];
}
if ( mReply )
mReply->abort();
emit downloadError( mErrors );
}
void QgsFileDownloader::error( const QString &errorMessage )
{
error( QStringList() << errorMessage );
}
void QgsFileDownloader::onReadyRead()
{
Q_ASSERT( mReply );
if ( mFile.fileName().isEmpty() )
{
error( tr( "No output filename specified" ) );
onFinished();
}
else if ( ! mFile.isOpen() && ! mFile.open( QIODevice::WriteOnly | QIODevice::Truncate ) )
{
error( tr( "Cannot open output file: %1" ).arg( mFile.fileName() ) );
onFinished();
}
else
{
QByteArray data = mReply->readAll();
mFile.write( data );
}
}
void QgsFileDownloader::onFinished()
{
// when canceled
if ( ! mErrors.isEmpty() || mDownloadCanceled )
{
if ( mFile.isOpen() )
mFile.close();
if ( mFile.exists() )
mFile.remove();
}
else
{
// download finished normally
if ( mFile.isOpen() )
{
mFile.flush();
mFile.close();
}
// get redirection url
QVariant redirectionTarget = mReply->attribute( QNetworkRequest::RedirectionTargetAttribute );
if ( mReply->error() )
{
mFile.remove();
error( tr( "Download failed: %1" ).arg( mReply->errorString() ) );
}
else if ( !redirectionTarget.isNull() )
{
QUrl newUrl = mUrl.resolved( redirectionTarget.toUrl() );
mUrl = newUrl;
mReply->deleteLater();
mFile.open( QIODevice::WriteOnly );
mFile.resize( 0 );
mFile.close();
startDownload();
return;
}
else
{
emit downloadCompleted();
}
}
emit downloadExited();
this->deleteLater();
}
void QgsFileDownloader::onDownloadProgress( qint64 bytesReceived, qint64 bytesTotal )
{
if ( mDownloadCanceled )
{
return;
}
emit downloadProgress( bytesReceived, bytesTotal );
}