src/modules/m_httpd.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                     E-mail:
   7  *              <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *          the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 using namespace std;
  18
  19 #include <stdio.h>
  20 #include "users.h"
  21 #include "channels.h"
  22 #include "modules.h"
  23 #include "inspsocket.h"
  24 #include "inspircd.h"
  25 #include "httpd.h"
  26
  27 /* $ModDesc: Provides HTTP serving facilities to modules */
  28
  29 class ModuleHttp;
  30
  31 static ModuleHttp* HttpModule;
  32 static bool claimed;
  33
  34 /** HTTP socket states
  35  */
  36 enum HttpState
  37 {
  38         HTTP_LISTEN = 0,
  39         HTTP_SERVE_WAIT_REQUEST = 1,
  40         HTTP_SERVE_RECV_POSTDATA = 2,
  41         HTTP_SERVE_SEND_DATA = 3
  42 };
  43
  44 class HttpSocket;
  45
  46 class HTTPTimeout : public InspTimer
  47 {
  48  private:
  49         HttpSocket* s;
  50         SocketEngine* SE;
  51  public:
  52         HTTPTimeout(HttpSocket* sock, SocketEngine* engine);
  53         void Tick(time_t TIME);
  54 };
  55
  56 /** A socket used for HTTP transport
  57  */
  58 class HttpSocket : public InspSocket
  59 {
  60         FileReader* index;
  61         HttpState InternalState;
  62         std::stringstream headers;
  63         std::string postdata;
  64         std::string request_type;
  65         std::string uri;
  66         std::string http_version;
  67         unsigned int postsize;
  68         unsigned int amount;
  69         HTTPTimeout* Timeout;
  70
  71  public:
  72
  73         HttpSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, FileReader* index_page) : InspSocket(SI, host, port, listening, maxtime), index(index_page), postsize(0)
  74         {
  75                 SI->Log(DEBUG,"HttpSocket constructor");
  76                 InternalState = HTTP_LISTEN;
  77                 Timeout = NULL;
  78         }
  79
  80         HttpSocket(InspIRCd* SI, int newfd, char* ip, FileReader* ind) : InspSocket(SI, newfd, ip), index(ind), postsize(0)
  81         {
  82                 InternalState = HTTP_SERVE_WAIT_REQUEST;
  83                 Timeout = new HTTPTimeout(this, Instance->SE);
  84                 Instance->Timers->AddTimer(Timeout);
  85         }
  86
  87         ~HttpSocket()
  88         {
  89                 if (Instance->Time() < Timeout->GetTimer())
  90                 {
  91                         if (Timeout)
  92                                 Instance->Timers->DelTimer(Timeout);
  93                         Timeout = NULL;
  94                 }
  95         }
  96
  97         virtual int OnIncomingConnection(int newsock, char* ip)
  98         {
  99                 if (InternalState == HTTP_LISTEN)
 100                 {
 101                         HttpSocket* s = new HttpSocket(this->Instance, newsock, ip, index);
 102                         s = s; /* Stop GCC whining */
 103                 }
 104                 return true;
 105         }
 106
 107         virtual void OnClose()
 108         {
 109         }
 110
 111         std::string Response(int response)
 112         {
 113                 switch (response)
 114                 {
 115                         case 100:
 116                                 return "CONTINUE";
 117                         case 101:
 118                                 return "SWITCHING PROTOCOLS";
 119                         case 200:
 120                                 return "OK";
 121                         case 201:
 122                                 return "CREATED";
 123                         case 202:
 124                                 return "ACCEPTED";
 125                         case 203:
 126                                 return "NON-AUTHORITATIVE INFORMATION";
 127                         case 204:
 128                                 return "NO CONTENT";
 129                         case 205:
 130                                 return "RESET CONTENT";
 131                         case 206:
 132                                 return "PARTIAL CONTENT";
 133                         case 300:
 134                                 return "MULTIPLE CHOICES";
 135                         case 301:
 136                                 return "MOVED PERMENANTLY";
 137                         case 302:
 138                                 return "FOUND";
 139                         case 303:
 140                                 return "SEE OTHER";
 141                         case 304:
 142                                 return "NOT MODIFIED";
 143                         case 305:
 144                                 return "USE PROXY";
 145                         case 307:
 146                                 return "TEMPORARY REDIRECT";
 147                         case 400:
 148                                 return "BAD REQUEST";
 149                         case 401:
 150                                 return "UNAUTHORIZED";
 151                         case 402:
 152                                 return "PAYMENT REQUIRED";
 153                         case 403:
 154                                 return "FORBIDDEN";
 155                         case 404:
 156                                 return "NOT FOUND";
 157                         case 405:
 158                                 return "METHOD NOT ALLOWED";
 159                         case 406:
 160                                 return "NOT ACCEPTABLE";
 161                         case 407:
 162                                 return "PROXY AUTHENTICATION REQUIRED";
 163                         case 408:
 164                                 return "REQUEST TIMEOUT";
 165                         case 409:
 166                                 return "CONFLICT";
 167                         case 410:
 168                                 return "GONE";
 169                         case 411:
 170                                 return "LENGTH REQUIRED";
 171                         case 412:
 172                                 return "PRECONDITION FAILED";
 173                         case 413:
 174                                 return "REQUEST ENTITY TOO LARGE";
 175                         case 414:
 176                                 return "REQUEST-URI TOO LONG";
 177                         case 415:
 178                                 return "UNSUPPORTED MEDIA TYPE";
 179                         case 416:
 180                                 return "REQUESTED RANGE NOT SATISFIABLE";
 181                         case 417:
 182                                 return "EXPECTATION FAILED";
 183                         case 500:
 184                                 return "INTERNAL SERVER ERROR";
 185                         case 501:
 186                                 return "NOT IMPLEMENTED";
 187                         case 502:
 188                                 return "BAD GATEWAY";
 189                         case 503:
 190                                 return "SERVICE UNAVAILABLE";
 191                         case 504:
 192                                 return "GATEWAY TIMEOUT";
 193                         case 505:
 194                                 return "HTTP VERSION NOT SUPPORTED";
 195                         default:
 196                                 return "WTF";
 197                         break;
 198
 199                 }
 200         }
 201
 202         void SendHeaders(unsigned long size, int response, const std::string &extraheaders)
 203         {
 204                 time_t local = this->Instance->Time();
 205                 struct tm *timeinfo = gmtime(&local);
 206                 this->Write("HTTP/1.1 "+ConvToStr(response)+" "+Response(response)+"\r\nDate: ");
 207                 this->Write(asctime(timeinfo));
 208                 if (extraheaders.empty())
 209                 {
 210                         this->Write("Content-Type: text/html\r\n");
 211                 }
 212                 else
 213                 {
 214                         this->Write(extraheaders);
 215                 }
 216                 this->Write("Server: InspIRCd/m_httpd.so/1.1\r\nContent-Length: "+ConvToStr(size)+
 217                                 "\r\nConnection: close\r\n\r\n");
 218         }
 219
 220         virtual bool OnDataReady()
 221         {
 222                 char* data = this->Read();
 223
 224                 /* Check that the data read is a valid pointer and it has some content */
 225                 if (data && *data)
 226                 {
 227                         headers << data;
 228
 229                         if (headers.str().find("\r\n\r\n") != std::string::npos)
 230                         {
 231                                 if (request_type == "")
 232                                 {
 233                                         headers >> request_type;
 234                                         headers >> uri;
 235                                         headers >> http_version;
 236                                 }
 237
 238                                 if ((InternalState == HTTP_SERVE_WAIT_REQUEST) && (request_type == "POST"))
 239                                 {
 240                                         /* Do we need to fetch postdata? */
 241                                         postdata = "";
 242                                         amount = 0;
 243                                         InternalState = HTTP_SERVE_RECV_POSTDATA;
 244                                         std::string header_item;
 245                                         while (headers >> header_item)
 246                                         {
 247                                                 if (header_item == "Content-Length:")
 248                                                 {
 249                                                         headers >> header_item;
 250                                                         postsize = atoi(header_item.c_str());
 251                                                 }
 252                                         }
 253                                         if (!postsize)
 254                                         {
 255                                                 InternalState = HTTP_SERVE_SEND_DATA;
 256                                                 SendHeaders(0, 400, "");
 257                                                 Timeout = new HTTPTimeout(this, Instance->SE);
 258                                                 Instance->Timers->AddTimer(Timeout);
 259                                         }
 260                                         else
 261                                         {
 262                                                 Instance->Log(DEBUG,"%d bytes to read for POST",postsize);
 263                                                 std::string::size_type x = headers.str().find("\r\n\r\n");
 264                                                 postdata = headers.str().substr(x+4, headers.str().length());
 265                                                 /* Get content length and store */
 266                                                 Instance->Log(DEBUG,"Initial postdata: '%s'", postdata.c_str());
 267                                                 if (postdata.length() >= postsize)
 268                                                         ServeData();
 269                                         }
 270                                 }
 271                                 else if (InternalState == HTTP_SERVE_RECV_POSTDATA)
 272                                 {
 273                                         /* Add postdata, once we have it all, send the event */
 274                                         amount += strlen(data);
 275                                         postdata.append(data);
 276                                         if (amount >= postsize)
 277                                                 ServeData();
 278                                 }
 279                                 else
 280                                 {
 281                                         ServeData();
 282                                 }
 283                                 return true;
 284                         }
 285                         return true;
 286                 }
 287                 else
 288                 {
 289                         return false;
 290                 }
 291         }
 292
 293         void ServeData()
 294         {
 295                 /* Headers are complete */
 296                 InternalState = HTTP_SERVE_SEND_DATA;
 297
 298                 Instance->Timers->DelTimer(Timeout);
 299                 Timeout = NULL;
 300
 301                 if ((http_version != "HTTP/1.1") && (http_version != "HTTP/1.0"))
 302                 {
 303                         SendHeaders(0, 505, "");
 304                 }
 305                 else
 306                 {
 307                         if ((request_type == "GET") && (uri == "/"))
 308                         {
 309                                 SendHeaders(index->ContentSize(), 200, "");
 310                                 this->Write(index->Contents());
 311                         }
 312                         else
 313                         {
 314                                 claimed = false;
 315                                 HTTPRequest httpr(request_type,uri,&headers,this,this->GetIP(),postdata);
 316                                 Event e((char*)&httpr, (Module*)HttpModule, "httpd_url");
 317                                 e.Send(this->Instance);
 318                                 if (!claimed)
 319                                 {
 320                                         SendHeaders(0, 404, "");
 321                                         Instance->Log(DEBUG,"Page not claimed, 404");
 322                                 }
 323                         }
 324                 }
 325                 Timeout = new HTTPTimeout(this, Instance->SE);
 326                 Instance->Timers->AddTimer(Timeout);
 327         }
 328
 329         void Page(std::stringstream* n, int response, std::string& extraheaders)
 330         {
 331                 Instance->Log(DEBUG,"Sending page");
 332                 SendHeaders(n->str().length(), response, extraheaders);
 333                 this->Write(n->str());
 334         }
 335 };
 336
 337 HTTPTimeout::HTTPTimeout(HttpSocket* sock, SocketEngine* engine) : InspTimer(60, time(NULL)), s(sock), SE(engine)
 338 {
 339 }
 340
 341 void HTTPTimeout::Tick(time_t TIME)
 342 {
 343         SE->DelFd(s);
 344         s->Close();
 345         delete s;
 346 }
 347
 348 class ModuleHttp : public Module
 349 {
 350         int port;
 351         std::string host;
 352         std::string bindip;
 353         std::string indexfile;
 354
 355         FileReader* index;
 356
 357         HttpSocket* http;
 358
 359  public:
 360
 361         void ReadConfig()
 362         {
 363                 ConfigReader c(ServerInstance);
 364                 this->host = c.ReadValue("http", "host", 0);
 365                 this->bindip = c.ReadValue("http", "ip", 0);
 366                 this->port = c.ReadInteger("http", "port", 0, true);
 367                 this->indexfile = c.ReadValue("http", "index", 0);
 368
 369                 if (index)
 370                 {
 371                         delete index;
 372                         index = NULL;
 373                 }
 374                 index = new FileReader(ServerInstance, this->indexfile);
 375         }
 376
 377         void CreateListener()
 378         {
 379                 http = new HttpSocket(ServerInstance, this->bindip, this->port, true, 0, index);
 380         }
 381
 382         ModuleHttp(InspIRCd* Me) : Module::Module(Me)
 383         {
 384                 index = NULL;
 385                 ReadConfig();
 386                 CreateListener();
 387         }
 388
 389         void OnEvent(Event* event)
 390         {
 391         }
 392
 393         char* OnRequest(Request* request)
 394         {
 395                 ServerInstance->Log(DEBUG,"Got HTTPDocument object");
 396                 claimed = true;
 397                 HTTPDocument* doc = (HTTPDocument*)request->GetData();
 398                 HttpSocket* sock = (HttpSocket*)doc->sock;
 399                 sock->Page(doc->GetDocument(), doc->GetResponseCode(), doc->GetExtraHeaders());
 400                 return NULL;
 401         }
 402
 403         void Implements(char* List)
 404         {
 405                 List[I_OnEvent] = List[I_OnRequest] = 1;
 406         }
 407
 408         virtual ~ModuleHttp()
 409         {
 410                 ServerInstance->SE->DelFd(http);
 411         }
 412
 413         virtual Version GetVersion()
 414         {
 415                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR|VF_SERVICEPROVIDER);
 416         }
 417 };
 418
 419
 420 class ModuleHttpFactory : public ModuleFactory
 421 {
 422  public:
 423         ModuleHttpFactory()
 424         {
 425         }
 426
 427         ~ModuleHttpFactory()
 428         {
 429         }
 430
 431         virtual Module * CreateModule(InspIRCd* Me)
 432         {
 433                 HttpModule = new ModuleHttp(Me);
 434                 return HttpModule;
 435         }
 436 };
 437
 438
 439 extern "C" void * init_module( void )
 440 {
 441         return new ModuleHttpFactory;
 442 }