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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
|
/* 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/translation.h"
#include <SDL/SDL_net.h>
#include <common/config-manager.h>
#ifdef POSIX
#include <sys/types.h>
#include <ifaddrs.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#endif
namespace Common {
class MemoryReadWriteStream;
DECLARE_SINGLETON(Networking::LocalWebserver);
}
namespace Networking {
LocalWebserver::LocalWebserver(): _set(nullptr), _serverSocket(nullptr), _timerStarted(false),
_stopOnIdle(false), _minimalMode(false), _clients(0), _idlingFrames(0), _serverPort(DEFAULT_SERVER_PORT) {
addPathHandler("/", &_indexPageHandler);
addPathHandler("/files", &_filesPageHandler);
addPathHandler("/create", &_createDirectoryHandler);
addPathHandler("/download", &_downloadFileHandler);
addPathHandler("/upload", &_uploadFileHandler);
addPathHandler("/list", &_listAjaxHandler);
addPathHandler("/filesAJAX", &_filesAjaxPageHandler);
_defaultHandler = &_resourceHandler;
}
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(bool useMinimalMode) {
_handleMutex.lock();
_serverPort = getPort();
_stopOnIdle = false;
if (_timerStarted) {
_handleMutex.unlock();
return;
}
_minimalMode = useMinimalMode;
startTimer();
// Create a listening TCP socket
IPaddress ip;
if (SDLNet_ResolveHost(&ip, NULL, _serverPort) == -1) {
error("LocalWebserver: SDLNet_ResolveHost: %s\n", SDLNet_GetError());
}
resolveAddress(&ip);
_serverSocket = SDLNet_TCP_Open(&ip);
if (!_serverSocket) {
warning("LocalWebserver: SDLNet_TCP_Open: %s", SDLNet_GetError());
stopTimer();
g_system->displayMessageOnOSD(_("Failed to start local webserver.\nCheck whether selected port is not used by another application and try again."));
_handleMutex.unlock();
return;
}
// Create a socket set
_set = SDLNet_AllocSocketSet(MAX_CONNECTIONS + 1); //one more for our server socket
if (!_set) {
error("LocalWebserver: SDLNet_AllocSocketSet: %s\n", SDLNet_GetError());
}
int numused = SDLNet_TCP_AddSocket(_set, _serverSocket);
if (numused == -1) {
error("LocalWebserver: SDLNet_AddSocket: %s\n", SDLNet_GetError());
}
_handleMutex.unlock();
}
void LocalWebserver::stop() {
_handleMutex.lock();
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;
}
_handleMutex.unlock();
}
void LocalWebserver::stopOnIdle() { _stopOnIdle = true; }
void LocalWebserver::addPathHandler(Common::String path, BaseHandler *handler) {
if (_pathHandlers.contains(path))
warning("LocalWebserver::addPathHandler: path already had a handler");
_pathHandlers[path] = handler;
}
Common::String LocalWebserver::getAddress() { return _address; }
IndexPageHandler &LocalWebserver::indexPageHandler() { return _indexPageHandler; }
bool LocalWebserver::isRunning() {
bool result = false;
_handleMutex.lock();
result = _timerStarted;
_handleMutex.unlock();
return result;
}
uint32 LocalWebserver::getPort() {
#ifdef NETWORKING_LOCALWEBSERVER_ENABLE_PORT_OVERRIDE
if (ConfMan.hasKey("local_server_port"))
return ConfMan.getInt("local_server_port");
#endif
return DEFAULT_SERVER_PORT;
}
void LocalWebserver::handle() {
_handleMutex.lock();
int numready = SDLNet_CheckSockets(_set, 0);
if (numready == -1) {
error("LocalWebserver: SDLNet_CheckSockets: %s\n", SDLNet_GetError());
} else if (numready) {
acceptClient();
}
for (uint32 i = 0; i < MAX_CONNECTIONS; ++i)
handleClient(i);
_clients = 0;
for (uint32 i = 0; i < MAX_CONNECTIONS; ++i)
if (_client[i].state() != INVALID)
++_clients;
if (_clients == 0)
++_idlingFrames;
else
_idlingFrames = 0;
if (_idlingFrames > FRAMES_PER_SECOND && _stopOnIdle) {
_handleMutex.unlock();
stop();
return;
}
_handleMutex.unlock();
}
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
// check whether we know a handler for such URL
BaseHandler *handler = nullptr;
if (_pathHandlers.contains(_client[i].path())) {
handler = _pathHandlers[_client[i].path()];
} else {
// try default handler
handler = _defaultHandler;
}
// if server's in "minimal mode", only handlers which support it are used
if (handler && (!_minimalMode || handler->minimalModeSupported()))
handler->handle(_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;
}
++_clients;
for (uint32 i = 0; i < MAX_CONNECTIONS; ++i)
if (_client[i].state() == INVALID) {
_client[i].open(_set, client);
break;
}
}
void LocalWebserver::resolveAddress(void *ipAddress) {
IPaddress *ip = (IPaddress *)ipAddress;
// not resolved
_address = Common::String::format("http://127.0.0.1:%u/ (unresolved)", _serverPort);
// default way (might work everywhere, surely works on Windows)
const char *name = SDLNet_ResolveIP(ip);
if (name == NULL) {
warning("LocalWebserver: SDLNet_ResolveHost: %s\n", SDLNet_GetError());
} else {
IPaddress localIp;
if (SDLNet_ResolveHost(&localIp, name, _serverPort) == -1) {
warning("LocalWebserver: SDLNet_ResolveHost: %s\n", SDLNet_GetError());
} else {
_address = Common::String::format(
"http://%u.%u.%u.%u:%u/",
localIp.host & 0xFF, (localIp.host >> 8) & 0xFF, (localIp.host >> 16) & 0xFF, (localIp.host >> 24) & 0xFF,
_serverPort
);
}
}
// check that our trick worked
if (_address.contains("/127.0.0.1:") || _address.contains("localhost") || _address.contains("/0.0.0.0:"))
warning("LocalWebserver: Failed to resolve IP with the default way");
else
return;
// if not - try platform-specific
#ifdef POSIX
struct ifaddrs *ifAddrStruct = NULL;
void *tmpAddrPtr = NULL;
getifaddrs(&ifAddrStruct);
for (struct ifaddrs *i = ifAddrStruct; i != NULL; i = i->ifa_next) {
if (!i->ifa_addr) {
continue;
}
Common::String addr;
// IPv4
if (i->ifa_addr->sa_family == AF_INET) {
tmpAddrPtr = &((struct sockaddr_in *)i->ifa_addr)->sin_addr;
char addressBuffer[INET_ADDRSTRLEN];
inet_ntop(AF_INET, tmpAddrPtr, addressBuffer, INET_ADDRSTRLEN);
debug(9, "%s IP Address %s", i->ifa_name, addressBuffer);
addr = addressBuffer;
}
// IPv6
/*
if (i->ifa_addr->sa_family == AF_INET6) {
tmpAddrPtr = &((struct sockaddr_in6 *)i->ifa_addr)->sin6_addr;
char addressBuffer[INET6_ADDRSTRLEN];
inet_ntop(AF_INET6, tmpAddrPtr, addressBuffer, INET6_ADDRSTRLEN);
debug(9, "%s IP Address %s", i->ifa_name, addressBuffer);
addr = addressBuffer;
}
*/
if (addr.empty())
continue;
// ignored IPv4 addresses
if (addr.equals("127.0.0.1") || addr.equals("0.0.0.0") || addr.equals("localhost"))
continue;
// ignored IPv6 addresses
/*
if (addr.equals("::1"))
continue;
*/
// use the address found
_address = "http://" + addr + Common::String::format(":%u/", _serverPort);
}
if (ifAddrStruct != NULL) freeifaddrs(ifAddrStruct);
#endif
}
void LocalWebserver::setClientGetHandler(Client &client, Common::String response, long code, const char *mimeType) {
byte *data = new byte[response.size()];
memcpy(data, response.c_str(), response.size());
Common::MemoryReadStream *stream = new Common::MemoryReadStream(data, response.size(), DisposeAfterUse::YES);
setClientGetHandler(client, stream, code, mimeType);
}
void LocalWebserver::setClientGetHandler(Client &client, Common::SeekableReadStream *responseStream, long code, const char *mimeType) {
GetClientHandler *handler = new GetClientHandler(responseStream);
handler->setResponseCode(code);
if (mimeType)
handler->setHeader("Content-Type", mimeType);
client.setHandler(handler);
}
void LocalWebserver::setClientRedirectHandler(Client &client, Common::String response, Common::String location, const char *mimeType) {
byte *data = new byte[response.size()];
memcpy(data, response.c_str(), response.size());
Common::MemoryReadStream *stream = new Common::MemoryReadStream(data, response.size(), DisposeAfterUse::YES);
setClientRedirectHandler(client, stream, location, mimeType);
}
void LocalWebserver::setClientRedirectHandler(Client &client, Common::SeekableReadStream *responseStream, Common::String location, const char *mimeType) {
GetClientHandler *handler = new GetClientHandler(responseStream);
handler->setResponseCode(302); //redirect
handler->setHeader("Location", location);
if (mimeType)
handler->setHeader("Content-Type", mimeType);
client.setHandler(handler);
}
namespace {
int hexDigit(char c) {
if ('0' <= c && c <= '9') return c - '0';
if ('A' <= c && c <= 'F') return c - 'A' + 10;
if ('a' <= c && c <= 'f') return c - 'a' + 10;
return -1;
}
}
Common::String LocalWebserver::urlDecode(Common::String value) {
Common::String result = "";
uint32 size = value.size();
for (uint32 i = 0; i < size; ++i) {
if (value[i] == '+') {
result += ' ';
continue;
}
if (value[i] == '%' && i + 2 < size) {
int d1 = hexDigit(value[i + 1]);
int d2 = hexDigit(value[i + 2]);
if (0 <= d1 && d1 < 16 && 0 <= d2 && d2 < 16) {
result += (char)(d1 * 16 + d2);
i = i + 2;
continue;
}
}
result += value[i];
}
return result;
}
namespace {
bool isQueryUnreserved(char c) {
return (
('0' <= c && c <= '9') ||
('A' <= c && c <= 'Z') ||
('a' <= c && c <= 'z') ||
c == '-' || c == '_' || c == '.' || c == '!' ||
c == '~' || c == '*' || c == '\'' || c == '(' || c == ')'
);
}
}
Common::String LocalWebserver::urlEncodeQueryParameterValue(Common::String value) {
//OK chars = alphanum | "-" | "_" | "." | "!" | "~" | "*" | "'" | "(" | ")"
//reserved for query are ";", "/", "?", ":", "@", "&", "=", "+", ","
//that means these must be encoded too or otherwise they could malform the query
Common::String result = "";
char hexChar[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
for (uint32 i = 0; i < value.size(); ++i) {
char c = value[i];
if (isQueryUnreserved(c))
result += c;
else {
result += '%';
result += hexChar[(c >> 4) & 0xF];
result += hexChar[c & 0xF];
}
}
return result;
}
} // End of namespace Networking
|