forked from mavlink/qgroundcontrol
-
Notifications
You must be signed in to change notification settings - Fork 0
/
QGCFileDownload.cc
144 lines (115 loc) · 4.59 KB
/
QGCFileDownload.cc
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
/****************************************************************************
*
* (c) 2009-2016 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
*
* QGroundControl is licensed according to the terms in the file
* COPYING.md in the root of the source code directory.
*
****************************************************************************/
#include "QGCFileDownload.h"
#include <QFileInfo>
#include <QStandardPaths>
#include <QNetworkProxy>
QGCFileDownload::QGCFileDownload(QObject* parent)
: QNetworkAccessManager(parent)
{
}
bool QGCFileDownload::download(const QString& remoteFile, bool redirect)
{
if (!redirect) {
_originalRemoteFile = remoteFile;
}
if (remoteFile.isEmpty()) {
qWarning() << "downloadFile empty";
return false;
}
// Split out filename from path
QString remoteFileName = QFileInfo(remoteFile).fileName();
if (remoteFileName.isEmpty()) {
qWarning() << "Unabled to parse filename from downloadFile" << remoteFile;
return false;
}
// Strip out parameters from remote filename
int parameterIndex = remoteFileName.indexOf("?");
if (parameterIndex != -1) {
remoteFileName = remoteFileName.left(parameterIndex);
}
// Determine location to download file to
QString localFile = QStandardPaths::writableLocation(QStandardPaths::TempLocation);
if (localFile.isEmpty()) {
localFile = QStandardPaths::writableLocation(QStandardPaths::DownloadLocation);
if (localFile.isEmpty()) {
qDebug() << "Unabled to find writable download location. Tried downloads and temp directory.";
return false;
}
}
localFile += "/" + remoteFileName;
QUrl remoteUrl;
if (remoteFile.startsWith("http:") || remoteFile.startsWith("https:")) {
remoteUrl.setUrl(remoteFile);
} else {
remoteUrl = QUrl::fromLocalFile(remoteFile);
}
if (!remoteUrl.isValid()) {
qWarning() << "Remote URL is invalid" << remoteFile;
return false;
}
QNetworkRequest networkRequest(remoteUrl);
QNetworkProxy tProxy;
tProxy.setType(QNetworkProxy::DefaultProxy);
setProxy(tProxy);
// Store local file location in user attribute so we can retrieve when the download finishes
networkRequest.setAttribute(QNetworkRequest::User, localFile);
QNetworkReply* networkReply = get(networkRequest);
if (!networkReply) {
qWarning() << "QNetworkAccessManager::get failed";
return false;
}
connect(networkReply, &QNetworkReply::downloadProgress, this, &QGCFileDownload::downloadProgress);
connect(networkReply, &QNetworkReply::finished, this, &QGCFileDownload::_downloadFinished);
connect(networkReply, static_cast<void (QNetworkReply::*)(QNetworkReply::NetworkError)>(&QNetworkReply::error),
this, &QGCFileDownload::_downloadError);
return true;
}
void QGCFileDownload::_downloadFinished(void)
{
QNetworkReply* reply = qobject_cast<QNetworkReply*>(QObject::sender());
// When an error occurs or the user cancels the download, we still end up here. So bail out in
// those cases.
if (reply->error() != QNetworkReply::NoError) {
return;
}
// Check for redirection
QVariant redirectionTarget = reply->attribute(QNetworkRequest::RedirectionTargetAttribute);
if (!redirectionTarget.isNull()) {
QUrl redirectUrl = reply->url().resolved(redirectionTarget.toUrl());
download(redirectUrl.toString(), true /* redirect */);
reply->deleteLater();
return;
}
// Download file location is in user attribute
QString downloadFilename = reply->request().attribute(QNetworkRequest::User).toString();
Q_ASSERT(!downloadFilename.isEmpty());
// Store downloaded file in download location
QFile file(downloadFilename);
if (!file.open(QIODevice::WriteOnly)) {
emit error(QString("Could not save downloaded file to %1. Error: %2").arg(downloadFilename).arg(file.errorString()));
return;
}
file.write(reply->readAll());
file.close();
emit downloadFinished(_originalRemoteFile, downloadFilename);
}
/// @brief Called when an error occurs during download
void QGCFileDownload::_downloadError(QNetworkReply::NetworkError code)
{
QString errorMsg;
if (code == QNetworkReply::OperationCanceledError) {
errorMsg = "Download cancelled";
} else if (code == QNetworkReply::ContentNotFoundError) {
errorMsg = "Error: File Not Found";
} else {
errorMsg = QString("Error during download. Error: %1").arg(code);
}
emit error(errorMsg);
}