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
|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2009 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include "httpd.h"
/* $ModDesc: Provides HTTP serving facilities to modules */
/* $ModDep: httpd.h */
class ModuleHttpServer;
static ModuleHttpServer* HttpModule;
static bool claimed;
/** HTTP socket states
*/
enum HttpState
{
HTTP_SERVE_WAIT_REQUEST = 0, /* Waiting for a full request */
HTTP_SERVE_RECV_POSTDATA = 1, /* Waiting to finish recieving POST data */
HTTP_SERVE_SEND_DATA = 2 /* Sending response */
};
/** A socket used for HTTP transport
*/
class HttpServerSocket : public BufferedSocket
{
FileReader* index;
HttpState InternalState;
HTTPHeaders headers;
std::string reqbuffer;
std::string postdata;
unsigned int postsize;
std::string request_type;
std::string uri;
std::string http_version;
public:
HttpServerSocket(InspIRCd* SI, int newfd, char* ip, FileReader* ind) : BufferedSocket(SI, newfd, ip), index(ind), postsize(0)
{
InternalState = HTTP_SERVE_WAIT_REQUEST;
}
FileReader* GetIndex()
{
return index;
}
~HttpServerSocket()
{
}
virtual void OnClose()
{
}
std::string Response(int response)
{
switch (response)
{
case 100:
return "CONTINUE";
case 101:
return "SWITCHING PROTOCOLS";
case 200:
return "OK";
case 201:
return "CREATED";
case 202:
return "ACCEPTED";
case 203:
return "NON-AUTHORITATIVE INFORMATION";
case 204:
return "NO CONTENT";
case 205:
return "RESET CONTENT";
case 206:
return "PARTIAL CONTENT";
case 300:
return "MULTIPLE CHOICES";
case 301:
return "MOVED PERMENANTLY";
case 302:
return "FOUND";
case 303:
return "SEE OTHER";
case 304:
return "NOT MODIFIED";
case 305:
return "USE PROXY";
case 307:
return "TEMPORARY REDIRECT";
case 400:
return "BAD REQUEST";
case 401:
return "UNAUTHORIZED";
case 402:
return "PAYMENT REQUIRED";
case 403:
return "FORBIDDEN";
case 404:
return "NOT FOUND";
case 405:
return "METHOD NOT ALLOWED";
case 406:
return "NOT ACCEPTABLE";
case 407:
return "PROXY AUTHENTICATION REQUIRED";
case 408:
return "REQUEST TIMEOUT";
case 409:
return "CONFLICT";
case 410:
return "GONE";
case 411:
return "LENGTH REQUIRED";
case 412:
return "PRECONDITION FAILED";
case 413:
return "REQUEST ENTITY TOO LARGE";
case 414:
return "REQUEST-URI TOO LONG";
case 415:
return "UNSUPPORTED MEDIA TYPE";
case 416:
return "REQUESTED RANGE NOT SATISFIABLE";
case 417:
return "EXPECTATION FAILED";
case 500:
return "INTERNAL SERVER ERROR";
case 501:
return "NOT IMPLEMENTED";
case 502:
return "BAD GATEWAY";
case 503:
return "SERVICE UNAVAILABLE";
case 504:
return "GATEWAY TIMEOUT";
case 505:
return "HTTP VERSION NOT SUPPORTED";
default:
return "WTF";
break;
}
}
void SendHTTPError(int response)
{
HTTPHeaders empty;
std::string data = "<html><head></head><body>Server error "+ConvToStr(response)+": "+Response(response)+"<br>"+
"<small>Powered by <a href='http://www.inspircd.org'>InspIRCd</a></small></body></html>";
SendHeaders(data.length(), response, empty);
this->Write(data);
}
void SendHeaders(unsigned long size, int response, HTTPHeaders &rheaders)
{
this->Write(http_version + " "+ConvToStr(response)+" "+Response(response)+"\r\n");
time_t local = this->ServerInstance->Time();
struct tm *timeinfo = gmtime(&local);
char *date = asctime(timeinfo);
date[strlen(date) - 1] = '\0';
rheaders.CreateHeader("Date", date);
rheaders.CreateHeader("Server", "InspIRCd/m_httpd.so/1.2");
rheaders.SetHeader("Content-Length", ConvToStr(size));
if (size)
rheaders.CreateHeader("Content-Type", "text/html");
else
rheaders.RemoveHeader("Content-Type");
/* Supporting Connection: keep-alive causes a whole world of hurt syncronizing timeouts,
* so remove it, its not essential for what we need.
*/
rheaders.SetHeader("Connection", "Close");
this->Write(rheaders.GetFormattedHeaders());
this->Write("\r\n");
}
virtual bool OnDataReady()
{
const char* data = this->Read();
/* Check that the data read is a valid pointer and it has some content */
if (!data || !*data)
return false;
if (InternalState == HTTP_SERVE_RECV_POSTDATA)
{
postdata.append(data);
if (postdata.length() >= postsize)
ServeData();
}
else
{
reqbuffer.append(data);
if (reqbuffer.length() >= 8192)
{
ServerInstance->Logs->Log("m_httpd",DEBUG, "m_httpd dropped connection due to an oversized request buffer");
reqbuffer.clear();
return false;
}
if (InternalState == HTTP_SERVE_WAIT_REQUEST)
CheckRequestBuffer();
}
return true;
}
void CheckRequestBuffer()
{
std::string::size_type reqend = reqbuffer.find("\r\n\r\n");
if (reqend == std::string::npos)
return;
// We have the headers; parse them all
std::string::size_type hbegin = 0, hend;
while ((hend = reqbuffer.find("\r\n", hbegin)) != std::string::npos)
{
if (hbegin == hend)
break;
if (request_type.empty())
{
std::istringstream cheader(std::string(reqbuffer, hbegin, hend - hbegin));
cheader >> request_type;
cheader >> uri;
cheader >> http_version;
if (request_type.empty() || uri.empty() || http_version.empty())
{
SendHTTPError(400);
return;
}
hbegin = hend + 2;
continue;
}
std::string cheader = reqbuffer.substr(hbegin, hend - hbegin);
std::string::size_type fieldsep = cheader.find(':');
if ((fieldsep == std::string::npos) || (fieldsep == 0) || (fieldsep == cheader.length() - 1))
{
SendHTTPError(400);
return;
}
headers.SetHeader(cheader.substr(0, fieldsep), cheader.substr(fieldsep + 2));
hbegin = hend + 2;
}
reqbuffer.erase(0, reqend + 4);
std::transform(request_type.begin(), request_type.end(), request_type.begin(), ::toupper);
std::transform(http_version.begin(), http_version.end(), http_version.begin(), ::toupper);
if ((http_version != "HTTP/1.1") && (http_version != "HTTP/1.0"))
{
SendHTTPError(505);
return;
}
if (headers.IsSet("Content-Length") && (postsize = atoi(headers.GetHeader("Content-Length").c_str())) != 0)
{
InternalState = HTTP_SERVE_RECV_POSTDATA;
if (reqbuffer.length() >= postsize)
{
postdata = reqbuffer.substr(0, postsize);
reqbuffer.erase(0, postsize);
}
else if (!reqbuffer.empty())
{
postdata = reqbuffer;
reqbuffer.clear();
}
if (postdata.length() >= postsize)
ServeData();
return;
}
ServeData();
}
void ServeData()
{
InternalState = HTTP_SERVE_SEND_DATA;
if ((request_type == "GET") && (uri == "/"))
{
HTTPHeaders empty;
SendHeaders(index->ContentSize(), 200, empty);
this->Write(index->Contents());
}
else
{
claimed = false;
HTTPRequest httpr(request_type,uri,&headers,this,this->GetIP(),postdata);
Event acl((char*)&httpr, (Module*)HttpModule, "httpd_acl");
acl.Send(this->ServerInstance);
if (!claimed)
{
Event e((char*)&httpr, (Module*)HttpModule, "httpd_url");
e.Send(this->ServerInstance);
if (!claimed)
{
SendHTTPError(404);
}
}
}
}
void Page(std::stringstream* n, int response, HTTPHeaders *hheaders)
{
SendHeaders(n->str().length(), response, *hheaders);
this->Write(n->str());
}
};
/** Spawn HTTP sockets from a listener
*/
class HttpListener : public ListenSocketBase
{
FileReader* index;
public:
HttpListener(InspIRCd* Instance, FileReader *idx, int port, const std::string &addr) : ListenSocketBase(Instance, port, addr)
{
this->index = idx;
}
virtual void OnAcceptReady(const std::string &ipconnectedto, int nfd, const std::string &incomingip)
{
new HttpServerSocket(ServerInstance, nfd, (char *)incomingip.c_str(), index); // ugly cast courtesy of bufferedsocket
}
};
class ModuleHttpServer : public Module
{
std::vector<HttpServerSocket *> httpsocks;
std::vector<HttpListener *> httplisteners;
public:
void ReadConfig()
{
int port;
std::string host;
std::string bindip;
std::string indexfile;
FileReader* index;
HttpListener *http;
ConfigReader c(ServerInstance);
httpsocks.clear(); // XXX this will BREAK if this module is made rehashable
httplisteners.clear();
for (int i = 0; i < c.Enumerate("http"); i++)
{
host = c.ReadValue("http", "host", i);
bindip = c.ReadValue("http", "ip", i);
port = c.ReadInteger("http", "port", i, true);
indexfile = c.ReadValue("http", "index", i);
index = new FileReader(ServerInstance, indexfile);
if (!index->Exists())
throw ModuleException("Can't read index file: "+indexfile);
http = new HttpListener(ServerInstance, index, port, (char *)bindip.c_str()); // XXX this cast SUCKS.
httplisteners.push_back(http);
}
}
ModuleHttpServer(InspIRCd* Me) : Module(Me)
{
ReadConfig();
HttpModule = this;
Implementation eventlist[] = { I_OnRequest };
ServerInstance->Modules->Attach(eventlist, this, 1);
}
virtual const char* OnRequest(Request* request)
{
claimed = true;
HTTPDocument* doc = (HTTPDocument*)request->GetData();
HttpServerSocket* sock = (HttpServerSocket*)doc->sock;
sock->Page(doc->GetDocument(), doc->GetResponseCode(), &doc->headers);
return NULL;
}
virtual ~ModuleHttpServer()
{
for (size_t i = 0; i < httplisteners.size(); i++)
{
delete httplisteners[i];
}
for (size_t i = 0; i < httpsocks.size(); i++)
{
ServerInstance->SE->DelFd(httpsocks[i]);
httpsocks[i]->Close();
delete httpsocks[i]->GetIndex();
}
ServerInstance->BufferedSocketCull();
}
virtual Version GetVersion()
{
return Version("$Id$", VF_VENDOR | VF_SERVICEPROVIDER, API_VERSION);
}
};
MODULE_INIT(ModuleHttpServer)
|
