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CLOUD: Add CurlRequest

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CurlRequest uses own multi_handle, in which it creates an easy_handle to
make a request.

Every time `handle()` is called it checks whether request is complete
and, if it is, stops.
This commit is contained in:
Alexander Tkachev 2016-05-15 00:31:02 +06:00
parent 6ad983bb72
commit 8b585d631b
6 changed files with 118 additions and 26 deletions
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82
backends/cloud/dropbox/curlrequest.cpp Normal file
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/* 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.
*
*/
#define FORBIDDEN_SYMBOL_ALLOW_ALL
#include "backends/cloud/dropbox/curlrequest.h"
#include "common/debug.h"
#include <curl/curl.h>
namespace Cloud {
namespace Dropbox {
static size_t curlDataCallback(char *d, size_t n, size_t l, void *p) {
debug("%p got %d more bytes", p, n * l);
return n * l;
}
CurlRequest::CurlRequest(Callback cb, char *url) : Request(cb), _firstTime(true) {
_curlm = curl_multi_init();
_url = url;
}
CurlRequest::~CurlRequest() {
curl_multi_cleanup(_curlm);
}
bool CurlRequest::handle() {
if (_firstTime) {
CURL *eh = curl_easy_init();
curl_easy_setopt(eh, CURLOPT_WRITEFUNCTION, curlDataCallback);
curl_easy_setopt(eh, CURLOPT_WRITEDATA, this);
curl_easy_setopt(eh, CURLOPT_HEADER, 0L);
curl_easy_setopt(eh, CURLOPT_URL, _url);
curl_easy_setopt(eh, CURLOPT_VERBOSE, 0L);
curl_multi_add_handle(_curlm, eh);
_firstTime = false;
}
int U;
curl_multi_perform(_curlm, &U);
int Q;
CURLMsg *_curlMsg;
while ((_curlMsg = curl_multi_info_read(_curlm, &Q))) {
if (_curlMsg->msg == CURLMSG_DONE) {
CURL *e = _curlMsg->easy_handle;
debug("R: %d - %s\n", _curlMsg->data.result, curl_easy_strerror(_curlMsg->data.result));
curl_multi_remove_handle(_curlm, e);
curl_easy_cleanup(e);
_callback(0);
return true;
} else {
debug("E: CURLMsg (%d)\n", _curlMsg->msg);
}
}
return false;
}
} //end of namespace Dropbox
} //end of namespace Cloud