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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/networking/sdl_net/localwebserver.h"
#include "backends/networking/sdl_net/getclienthandler.h"
#include "common/memstream.h"
#include "common/str.h"
#include "common/system.h"
#include "common/timer.h"
#include "common/textconsole.h"
#include <SDL/SDL_net.h>
namespace Common {
class MemoryReadWriteStream;
DECLARE_SINGLETON(Networking::LocalWebserver);
}
namespace Networking {
LocalWebserver::LocalWebserver(): _set(nullptr), _serverSocket(nullptr), _timerStarted(false), _clients(0) {}
LocalWebserver::~LocalWebserver() {
stop();
}
void localWebserverTimer(void *ignored) {
LocalServer.handle();
}
void LocalWebserver::startTimer(int interval) {
Common::TimerManager *manager = g_system->getTimerManager();
if (manager->installTimerProc(localWebserverTimer, interval, 0, "Networking::LocalWebserver's Timer")) {
_timerStarted = true;
} else {
warning("Failed to install Networking::LocalWebserver's timer");
}
}
void LocalWebserver::stopTimer() {
Common::TimerManager *manager = g_system->getTimerManager();
manager->removeTimerProc(localWebserverTimer);
_timerStarted = false;
}
void LocalWebserver::start() {
if (_timerStarted) return;
startTimer();
// Create a listening TCP socket
IPaddress ip;
if (SDLNet_ResolveHost(&ip, NULL, SERVER_PORT) == -1) {
error("SDLNet_ResolveHost: %s\n", SDLNet_GetError());
}
_serverSocket = SDLNet_TCP_Open(&ip);
if (!_serverSocket) {
error("SDLNet_TCP_Open: %s\n", SDLNet_GetError());
}
// Create a socket set
_set = SDLNet_AllocSocketSet(MAX_CONNECTIONS + 1); //one more for our server socket
if (!_set) {
error("SDLNet_AllocSocketSet: %s\n", SDLNet_GetError());
}
int numused = SDLNet_TCP_AddSocket(_set, _serverSocket);
if (numused == -1) {
error("SDLNet_AddSocket: %s\n", SDLNet_GetError());
}
}
void LocalWebserver::stop() {
if (_timerStarted) stopTimer();
if (_serverSocket) {
SDLNet_TCP_Close(_serverSocket);
_serverSocket = nullptr;
}
for (uint32 i = 0; i < MAX_CONNECTIONS; ++i)
_client[i].close();
_clients = 0;
if (_set) {
SDLNet_FreeSocketSet(_set);
_set = nullptr;
}
}
void LocalWebserver::addPathHandler(Common::String path, ClientHandler handler) {
if (_pathHandlers.contains(path)) warning("LocalWebserver::addPathHandler: path already had a handler");
_pathHandlers[path] = handler;
}
void LocalWebserver::handle() {
int numready = SDLNet_CheckSockets(_set, 0);
if (numready == -1) {
error("SDLNet_CheckSockets: %s\n", SDLNet_GetError());
} else if (numready) acceptClient();
for (uint32 i = 0; i < MAX_CONNECTIONS; ++i)
handleClient(i);
}
void LocalWebserver::handleClient(uint32 i) {
switch (_client[i].state()) {
case INVALID: return;
case READING_HEADERS: _client[i].readHeaders(); break;
case READ_HEADERS: //decide what to do next with that client
//if GET, check whether we know a handler for such URL
//if PUT, check whether we know a handler for that URL
if (_pathHandlers.contains(_client[i].path()))
(*_pathHandlers[_client[i].path()])(_client[i]);
if (_client[i].state() == BEING_HANDLED || _client[i].state() == INVALID) break;
//if no handler, answer with default BAD REQUEST
//fallthrough
case BAD_REQUEST:
setClientGetHandler(_client[i], "<html><head><title>ScummVM - Bad Request</title></head><body>BAD REQUEST</body></html>", 400);
break;
case BEING_HANDLED:
_client[i].handle();
break;
}
}
void LocalWebserver::acceptClient() {
if (!SDLNet_SocketReady(_serverSocket)) return;
TCPsocket client = SDLNet_TCP_Accept(_serverSocket);
if (!client) return;
if (_clients == MAX_CONNECTIONS) { //drop the connection
SDLNet_TCP_Close(client);
return;
}
_client[_clients++].open(_set, client);
}
void LocalWebserver::setClientGetHandler(Client &client, Common::String response, long code) {
byte *data = new byte[response.size()];
memcpy(data, response.c_str(), response.size());
Common::MemoryReadStream *stream = new Common::MemoryReadStream(data, response.size(), DisposeAfterUse::YES);
GetClientHandler *handler = new GetClientHandler(stream);
handler->setResponseCode(code);
client.setHandler(handler);
}
} // End of namespace Networking
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