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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 <curl/curl.h>
#include "backends/networking/curl/connectionmanager.h"
#include "backends/networking/curl/networkreadstream.h"
#include "common/debug.h"
#include "common/fs.h"
#include "common/system.h"
#include "common/timer.h"
namespace Common {
DECLARE_SINGLETON(Networking::ConnectionManager);
}
namespace Networking {
ConnectionManager::ConnectionManager(): _multi(0), _timerStarted(false), _frame(0) {
curl_global_init(CURL_GLOBAL_ALL);
_multi = curl_multi_init();
}
ConnectionManager::~ConnectionManager() {
stopTimer();
//terminate all requests
_handleMutex.lock();
for (Common::Array<RequestWithCallback>::iterator i = _requests.begin(); i != _requests.end(); ++i) {
Request *request = i->request;
RequestCallback callback = i->onDeleteCallback;
if (request)
request->finish();
delete request;
if (callback)
(*callback)(request);
}
_requests.clear();
//cleanup
curl_multi_cleanup(_multi);
curl_global_cleanup();
_multi = nullptr;
_handleMutex.unlock();
}
void ConnectionManager::registerEasyHandle(CURL *easy) const {
curl_multi_add_handle(_multi, easy);
}
Request *ConnectionManager::addRequest(Request *request, RequestCallback callback) {
_addedRequestsMutex.lock();
_addedRequests.push_back(RequestWithCallback(request, callback));
if (!_timerStarted)
startTimer();
_addedRequestsMutex.unlock();
return request;
}
Common::String ConnectionManager::urlEncode(Common::String s) const {
if (!_multi)
return "";
#if LIBCURL_VERSION_NUM >= 0x070F04
char *output = curl_easy_escape(_multi, s.c_str(), s.size());
#else
char *output = curl_escape(s.c_str(), s.size());
#endif
if (output) {
Common::String result = output;
curl_free(output);
return result;
}
return "";
}
uint32 ConnectionManager::getCloudRequestsPeriodInMicroseconds() {
return TIMER_INTERVAL * CLOUD_PERIOD;
}
const char *ConnectionManager::getCaCertPath() {
#if defined(DATA_PATH)
static enum {
kNotInitialized,
kFileNotFound,
kFileExists
} state = kNotInitialized;
if (state == kNotInitialized) {
Common::FSNode node(DATA_PATH"/cacert.pem");
state = node.exists() ? kFileExists : kFileNotFound;
}
if (state == kFileExists) {
return DATA_PATH"/cacert.pem";
} else {
return nullptr;
}
#else
return nullptr;
#endif
}
//private goes here:
void connectionsThread(void *ignored) {
ConnMan.handle();
}
void ConnectionManager::startTimer(int interval) {
Common::TimerManager *manager = g_system->getTimerManager();
if (manager->installTimerProc(connectionsThread, interval, 0, "Networking::ConnectionManager's Timer")) {
_timerStarted = true;
} else {
warning("Failed to install Networking::ConnectionManager's timer");
}
}
void ConnectionManager::stopTimer() {
debug(9, "timer stopped");
Common::TimerManager *manager = g_system->getTimerManager();
manager->removeTimerProc(connectionsThread);
_timerStarted = false;
}
bool ConnectionManager::hasAddedRequests() {
_addedRequestsMutex.lock();
bool hasNewRequests = !_addedRequests.empty();
_addedRequestsMutex.unlock();
return hasNewRequests;
}
void ConnectionManager::handle() {
//lock mutex here (in case another handle() would be called before this one ends)
_handleMutex.lock();
++_frame;
if (_frame % CLOUD_PERIOD == 0)
interateRequests();
if (_frame % CURL_PERIOD == 0)
processTransfers();
if (_requests.empty() && !hasAddedRequests())
stopTimer();
_handleMutex.unlock();
}
void ConnectionManager::interateRequests() {
//add new requests
_addedRequestsMutex.lock();
for (Common::Array<RequestWithCallback>::iterator i = _addedRequests.begin(); i != _addedRequests.end(); ++i) {
_requests.push_back(*i);
}
_addedRequests.clear();
_addedRequestsMutex.unlock();
//call handle() of all running requests (so they can do their work)
if (_frame % DEBUG_PRINT_PERIOD == 0)
debug(9, "handling %d request(s)", _requests.size());
for (Common::Array<RequestWithCallback>::iterator i = _requests.begin(); i != _requests.end();) {
Request *request = i->request;
if (request) {
if (request->state() == PROCESSING)
request->handle();
else if (request->state() == RETRY)
request->handleRetry();
}
if (!request || request->state() == FINISHED) {
delete (i->request);
if (i->onDeleteCallback)
(*i->onDeleteCallback)(i->request); //that's not a mistake (we're passing an address and that method knows there is no object anymore)
_requests.erase(i);
continue;
}
++i;
}
}
void ConnectionManager::processTransfers() {
if (!_multi) return;
//check libcurl's transfers and notify requests of messages from queue (transfer completion or failure)
int transfersRunning;
curl_multi_perform(_multi, &transfersRunning);
int messagesInQueue;
CURLMsg *curlMsg;
while ((curlMsg = curl_multi_info_read(_multi, &messagesInQueue))) {
if (curlMsg->msg == CURLMSG_DONE) {
CURL *easyHandle = curlMsg->easy_handle;
NetworkReadStream *stream = nullptr;
curl_easy_getinfo(easyHandle, CURLINFO_PRIVATE, &stream);
if (stream)
stream->finished(curlMsg->data.result);
curl_multi_remove_handle(_multi, easyHandle);
} else {
warning("Unknown libcurl message type %d", curlMsg->msg);
}
}
}
} // End of namespace Cloud
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