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
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "backends/cloud/downloadrequest.h"
#include "backends/networking/curl/connectionmanager.h"
#include "common/textconsole.h"
namespace Cloud {
DownloadRequest::DownloadRequest(Storage *storage, Storage::BoolCallback callback, Networking::ErrorCallback ecb, Common::String remoteFileId, Common::DumpFile *dumpFile):
Request(nullptr, ecb), _boolCallback(callback), _localFile(dumpFile), _remoteFileId(remoteFileId), _storage(storage),
_remoteFileStream(nullptr), _workingRequest(nullptr), _ignoreCallback(false), _buffer(new byte[DOWNLOAD_REQUEST_BUFFER_SIZE]) {
start();
}
DownloadRequest::~DownloadRequest() {
_ignoreCallback = true;
if (_workingRequest)
_workingRequest->finish();
delete _boolCallback;
delete _localFile;
delete[] _buffer;
}
void DownloadRequest::start() {
_ignoreCallback = true;
if (_workingRequest)
_workingRequest->finish();
_remoteFileStream = nullptr;
//TODO: add some way to reopen DumpFile, so DownloadRequest could be restarted
_ignoreCallback = false;
_workingRequest = _storage->streamFileById(
_remoteFileId,
new Common::Callback<DownloadRequest, Networking::NetworkReadStreamResponse>(this, &DownloadRequest::streamCallback),
new Common::Callback<DownloadRequest, Networking::ErrorResponse>(this, &DownloadRequest::streamErrorCallback)
);
}
void DownloadRequest::streamCallback(Networking::NetworkReadStreamResponse response) {
_workingRequest = nullptr;
if (_ignoreCallback)
return;
_remoteFileStream = (Networking::NetworkReadStream *)response.value;
}
void DownloadRequest::streamErrorCallback(Networking::ErrorResponse error) {
_workingRequest = nullptr;
if (_ignoreCallback)
return;
finishError(error);
}
void DownloadRequest::handle() {
if (!_localFile) {
warning("DownloadRequest: no file to write");
finishError(Networking::ErrorResponse(this, false, true, "", -1));
return;
}
if (!_localFile->isOpen()) {
warning("DownloadRequest: failed to open file to write");
finishError(Networking::ErrorResponse(this, false, true, "", -1));
return;
}
if (!_remoteFileStream) {
//waiting for callback
return;
}
uint32 readBytes = _remoteFileStream->read(_buffer, DOWNLOAD_REQUEST_BUFFER_SIZE);
if (readBytes != 0)
if (_localFile->write(_buffer, readBytes) != readBytes) {
warning("DownloadRequest: unable to write all received bytes into output file");
finishError(Networking::ErrorResponse(this, false, true, "", -1));
return;
}
if (_remoteFileStream->eos()) {
if (_remoteFileStream->httpResponseCode() != 200) {
warning("DownloadRequest: HTTP response code is not 200 OK (it's %ld)", _remoteFileStream->httpResponseCode());
//TODO: do something about it actually
// the problem is file's already downloaded, stream is over
// so we can't return error message anymore
}
finishDownload(_remoteFileStream->httpResponseCode() == 200);
_localFile->close(); //yes, I know it's closed automatically in ~DumpFile()
}
}
void DownloadRequest::restart() {
warning("DownloadRequest: can't restart as there are no means to reopen DumpFile");
finishError(Networking::ErrorResponse(this, false, true, "", -1));
//start();
}
void DownloadRequest::finishDownload(bool success) {
Request::finishSuccess();
if (_boolCallback)
(*_boolCallback)(Storage::BoolResponse(this, success));
}
void DownloadRequest::finishError(Networking::ErrorResponse error) {
if (_localFile)
_localFile->close();
Request::finishError(error);
}
double DownloadRequest::getProgress() const {
if (_remoteFileStream)
return _remoteFileStream->getProgress();
return 0;
}
} // End of namespace Cloud
|
