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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/curl/networkreadstream.h"
#include "common/debug.h"
#include <curl/curl.h>
namespace Cloud {
static size_t curlDataCallback(char *d, size_t n, size_t l, void *p) {
NetworkReadStream *stream = (NetworkReadStream *)p;
if (stream) return stream->dataCallback(d, n, l);
return 0;
}
NetworkReadStream::NetworkReadStream(const char *url): _easy(0), _eos(false), _requestComplete(false) {
_easy = curl_easy_init();
curl_easy_setopt(_easy, CURLOPT_WRITEFUNCTION, curlDataCallback);
curl_easy_setopt(_easy, CURLOPT_WRITEDATA, this); //so callback can call us
curl_easy_setopt(_easy, CURLOPT_PRIVATE, this); //so ConnectionManager can call us when request is complete
curl_easy_setopt(_easy, CURLOPT_HEADER, 0L);
curl_easy_setopt(_easy, CURLOPT_URL, url);
curl_easy_setopt(_easy, CURLOPT_VERBOSE, 0L);
}
NetworkReadStream::~NetworkReadStream() {
curl_easy_cleanup(_easy);
}
bool NetworkReadStream::eos() const {
return _eos;
}
uint32 NetworkReadStream::read(void *dataPtr, uint32 dataSize) {
uint32 available = _bytes.size();
if (available == 0) {
if (_requestComplete) _eos = true;
return 0;
}
char *data = (char *)dataPtr;
uint32 actuallyRead = (dataSize < available ? dataSize : available);
for (uint32 i = 0; i < actuallyRead; ++i) data[i] = _bytes[i];
data[actuallyRead] = 0;
_bytes.erase(0, actuallyRead);
return actuallyRead;
}
void NetworkReadStream::done() {
_requestComplete = true;
}
size_t NetworkReadStream::dataCallback(char *d, size_t n, size_t l) {
//TODO: return CURL_WRITEFUNC_PAUSE if _bytes is too long
//TODO: remember https://curl.haxx.se/libcurl/c/curl_easy_pause.html (Memory Use / compressed data case)
//TODO: if using pause, don't forget to unpause it somehow from read() up there
_bytes += Common::String(d, n*l);
return n*l;
}
} //end of namespace Cloud
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