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 <algorithm>
  20 #include "modules.h"
  21 #include "inspircd.h"
  22 #include "httpd.h"
  23
  24 /* $ModDesc: Provides HTTP serving facilities to modules */
  25
  26 class ModuleHttp;
  27
  28 static ModuleHttp* HttpModule;
  29 static bool claimed;
  30
  31 /** HTTP socket states
  32  */
  33 enum HttpState
  34 {
  35         HTTP_LISTEN = 0,
  36         HTTP_SERVE_WAIT_REQUEST = 1,
  37         HTTP_SERVE_RECV_POSTDATA = 2,
  38         HTTP_SERVE_SEND_DATA = 3
  39 };
  40
  41 class HttpSocket;
  42
  43 /** This class is used to handle HTTP socket timeouts
  44  */
  45 class HTTPTimeout : public InspTimer
  46 {
  47  private:
  48         /** HttpSocket we are attached to
  49          */
  50         HttpSocket* s;
  51         /** Socketengine the file descriptor is in
  52          */
  53         SocketEngine* SE;
  54  public:
  55         /** Attach timeout to HttpSocket
  56          */
  57         HTTPTimeout(HttpSocket* sock, SocketEngine* engine);
  58         /** Handle timer tick
  59          */
  60         void Tick(time_t TIME);
  61 };
  62
  63 /** A socket used for HTTP transport
  64  */
  65 class HttpSocket : public InspSocket
  66 {
  67         FileReader* index;
  68         HttpState InternalState;
  69         std::stringstream headers;
  70         std::string postdata;
  71         std::string request_type;
  72         std::string uri;
  73         std::string http_version;
  74         unsigned int postsize;
  75         unsigned int amount;
  76         HTTPTimeout* Timeout;
  77
  78  public:
  79
  80         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)
  81         {
  82                 SI->Log(DEBUG,"HttpSocket constructor");
  83                 InternalState = HTTP_LISTEN;
  84                 Timeout = NULL;
  85         }
  86
  87         HttpSocket(InspIRCd* SI, int newfd, char* ip, FileReader* ind) : InspSocket(SI, newfd, ip), index(ind), postsize(0)
  88         {
  89                 InternalState = HTTP_SERVE_WAIT_REQUEST;
  90                 Timeout = new HTTPTimeout(this, Instance->SE);
  91                 Instance->Timers->AddTimer(Timeout);
  92         }
  93
  94         ~HttpSocket()
  95         {
  96                 if (Instance->Time() < Timeout->GetTimer())
  97                 {
  98                         if (Timeout)
  99                                 Instance->Timers->DelTimer(Timeout);
 100                         Timeout = NULL;
 101                 }
 102         }
 103
 104         virtual int OnIncomingConnection(int newsock, char* ip)
 105         {
 106                 if (InternalState == HTTP_LISTEN)
 107                 {
 108                         HttpSocket* s = new HttpSocket(this->Instance, newsock, ip, index);
 109                         s = s; /* Stop GCC whining */
 110                 }
 111                 return true;
 112         }
 113
 114         virtual void OnClose()
 115         {
 116         }
 117
 118         std::string Response(int response)
 119         {
 120                 switch (response)
 121                 {
 122                         case 100:
 123                                 return "CONTINUE";
 124                         case 101:
 125                                 return "SWITCHING PROTOCOLS";
 126                         case 200:
 127                                 return "OK";
 128                         case 201:
 129                                 return "CREATED";
 130                         case 202:
 131                                 return "ACCEPTED";
 132                         case 203:
 133                                 return "NON-AUTHORITATIVE INFORMATION";
 134                         case 204:
 135                                 return "NO CONTENT";
 136                         case 205:
 137                                 return "RESET CONTENT";
 138                         case 206:
 139                                 return "PARTIAL CONTENT";
 140                         case 300:
 141                                 return "MULTIPLE CHOICES";
 142                         case 301:
 143                                 return "MOVED PERMENANTLY";
 144                         case 302:
 145                                 return "FOUND";
 146                         case 303:
 147                                 return "SEE OTHER";
 148                         case 304:
 149                                 return "NOT MODIFIED";
 150                         case 305:
 151                                 return "USE PROXY";
 152                         case 307:
 153                                 return "TEMPORARY REDIRECT";
 154                         case 400:
 155                                 return "BAD REQUEST";
 156                         case 401:
 157                                 return "UNAUTHORIZED";
 158                         case 402:
 159                                 return "PAYMENT REQUIRED";
 160                         case 403:
 161                                 return "FORBIDDEN";
 162                         case 404:
 163                                 return "NOT FOUND";
 164                         case 405:
 165                                 return "METHOD NOT ALLOWED";
 166                         case 406:
 167                                 return "NOT ACCEPTABLE";
 168                         case 407:
 169                                 return "PROXY AUTHENTICATION REQUIRED";
 170                         case 408:
 171                                 return "REQUEST TIMEOUT";
 172                         case 409:
 173                                 return "CONFLICT";
 174                         case 410:
 175                                 return "GONE";
 176                         case 411:
 177                                 return "LENGTH REQUIRED";
 178                         case 412:
 179                                 return "PRECONDITION FAILED";
 180                         case 413:
 181                                 return "REQUEST ENTITY TOO LARGE";
 182                         case 414:
 183                                 return "REQUEST-URI TOO LONG";
 184                         case 415:
 185                                 return "UNSUPPORTED MEDIA TYPE";
 186                         case 416:
 187                                 return "REQUESTED RANGE NOT SATISFIABLE";
 188                         case 417:
 189                                 return "EXPECTATION FAILED";
 190                         case 500:
 191                                 return "INTERNAL SERVER ERROR";
 192                         case 501:
 193                                 return "NOT IMPLEMENTED";
 194                         case 502:
 195                                 return "BAD GATEWAY";
 196                         case 503:
 197                                 return "SERVICE UNAVAILABLE";
 198                         case 504:
 199                                 return "GATEWAY TIMEOUT";
 200                         case 505:
 201                                 return "HTTP VERSION NOT SUPPORTED";
 202                         default:
 203                                 return "WTF";
 204                         break;
 205
 206                 }
 207         }
 208
 209         void SendHeaders(unsigned long size, int response, const std::string &extraheaders)
 210         {
 211                 time_t local = this->Instance->Time();
 212                 struct tm *timeinfo = gmtime(&local);
 213                 this->Write("HTTP/1.1 "+ConvToStr(response)+" "+Response(response)+"\r\nDate: ");
 214                 this->Write(asctime(timeinfo));
 215                 if (extraheaders.empty())
 216                 {
 217                         this->Write("Content-Type: text/html\r\n");
 218                 }
 219                 else
 220                 {
 221                         this->Write(extraheaders);
 222                 }
 223                 this->Write("Server: InspIRCd/m_httpd.so/1.1\r\nContent-Length: "+ConvToStr(size)+
 224                                 "\r\nConnection: close\r\n\r\n");
 225         }
 226
 227         virtual bool OnDataReady()
 228         {
 229                 char* data = this->Read();
 230
 231                 /* Check that the data read is a valid pointer and it has some content */
 232                 if (data && *data)
 233                 {
 234                         headers << data;
 235
 236                         if (headers.str().find("\r\n\r\n") != std::string::npos)
 237                         {
 238                                 if (request_type == "")
 239                                 {
 240                                         headers >> request_type;
 241                                         headers >> uri;
 242                                         headers >> http_version;
 243
 244                                         std::transform(request_type.begin(), request_type.end(), request_type.begin(), ::toupper);
 245                                         std::transform(http_version.begin(), http_version.end(), http_version.begin(), ::toupper);
 246                                 }
 247
 248                                 if ((InternalState == HTTP_SERVE_WAIT_REQUEST) && (request_type == "POST"))
 249                                 {
 250                                         /* Do we need to fetch postdata? */
 251                                         postdata = "";
 252                                         amount = 0;
 253                                         InternalState = HTTP_SERVE_RECV_POSTDATA;
 254                                         std::string header_item;
 255                                         while (headers >> header_item)
 256                                         {
 257                                                 if (header_item == "Content-Length:")
 258                                                 {
 259                                                         headers >> header_item;
 260                                                         postsize = atoi(header_item.c_str());
 261                                                 }
 262                                         }
 263                                         if (!postsize)
 264                                         {
 265                                                 InternalState = HTTP_SERVE_SEND_DATA;
 266                                                 SendHeaders(0, 400, "");
 267                                                 Timeout = new HTTPTimeout(this, Instance->SE);
 268                                                 Instance->Timers->AddTimer(Timeout);
 269                                         }
 270                                         else
 271                                         {
 272                                                 Instance->Log(DEBUG,"%d bytes to read for POST",postsize);
 273                                                 std::string::size_type x = headers.str().find("\r\n\r\n");
 274                                                 postdata = headers.str().substr(x+4, headers.str().length());
 275                                                 /* Get content length and store */
 276                                                 Instance->Log(DEBUG,"Initial postdata: '%s'", postdata.c_str());
 277                                                 if (postdata.length() >= postsize)
 278                                                         ServeData();
 279                                         }
 280                                 }
 281                                 else if (InternalState == HTTP_SERVE_RECV_POSTDATA)
 282                                 {
 283                                         /* Add postdata, once we have it all, send the event */
 284                                         amount += strlen(data);
 285                                         postdata.append(data);
 286                                         if (amount >= postsize)
 287                                                 ServeData();
 288                                 }
 289                                 else
 290                                 {
 291                                         ServeData();
 292                                 }
 293                                 return true;
 294                         }
 295                         return true;
 296                 }
 297                 else
 298                 {
 299                         return false;
 300                 }
 301         }
 302
 303         void ServeData()
 304         {
 305                 /* Headers are complete */
 306                 InternalState = HTTP_SERVE_SEND_DATA;
 307
 308                 Instance->Timers->DelTimer(Timeout);
 309                 Timeout = NULL;
 310
 311                 if ((http_version != "HTTP/1.1") && (http_version != "HTTP/1.0"))
 312                 {
 313                         SendHeaders(0, 505, "");
 314                 }
 315                 else
 316                 {
 317                         if ((request_type == "GET") && (uri == "/"))
 318                         {
 319                                 SendHeaders(index->ContentSize(), 200, "");
 320                                 this->Write(index->Contents());
 321                         }
 322                         else
 323                         {
 324                                 claimed = false;
 325                                 HTTPRequest httpr(request_type,uri,&headers,this,this->GetIP(),postdata);
 326                                 Event e((char*)&httpr, (Module*)HttpModule, "httpd_url");
 327                                 e.Send(this->Instance);
 328                                 if (!claimed)
 329                                 {
 330                                         SendHeaders(0, 404, "");
 331                                         Instance->Log(DEBUG,"Page not claimed, 404");
 332                                 }
 333                         }
 334                 }
 335                 Timeout = new HTTPTimeout(this, Instance->SE);
 336                 Instance->Timers->AddTimer(Timeout);
 337         }
 338
 339         void Page(std::stringstream* n, int response, std::string& extraheaders)
 340         {
 341                 Instance->Log(DEBUG,"Sending page");
 342                 SendHeaders(n->str().length(), response, extraheaders);
 343                 this->Write(n->str());
 344         }
 345 };
 346
 347 HTTPTimeout::HTTPTimeout(HttpSocket* sock, SocketEngine* engine) : InspTimer(60, time(NULL)), s(sock), SE(engine)
 348 {
 349 }
 350
 351 void HTTPTimeout::Tick(time_t TIME)
 352 {
 353         SE->DelFd(s);
 354         s->Close();
 355         delete s;
 356 }
 357
 358 class ModuleHttp : public Module
 359 {
 360         int port;
 361         std::string host;
 362         std::string bindip;
 363         std::string indexfile;
 364
 365         FileReader* index;
 366
 367         HttpSocket* http;
 368
 369  public:
 370
 371         void ReadConfig()
 372         {
 373                 ConfigReader c(ServerInstance);
 374                 this->host = c.ReadValue("http", "host", 0);
 375                 this->bindip = c.ReadValue("http", "ip", 0);
 376                 this->port = c.ReadInteger("http", "port", 0, true);
 377                 this->indexfile = c.ReadValue("http", "index", 0);
 378
 379                 if (index)
 380                 {
 381                         delete index;
 382                         index = NULL;
 383                 }
 384                 index = new FileReader(ServerInstance, this->indexfile);
 385         }
 386
 387         void CreateListener()
 388         {
 389                 http = new HttpSocket(ServerInstance, this->bindip, this->port, true, 0, index);
 390         }
 391
 392         ModuleHttp(InspIRCd* Me) : Module::Module(Me)
 393         {
 394                 index = NULL;
 395                 ReadConfig();
 396                 CreateListener();
 397         }
 398
 399         void OnEvent(Event* event)
 400         {
 401         }
 402
 403         char* OnRequest(Request* request)
 404         {
 405                 ServerInstance->Log(DEBUG,"Got HTTPDocument object");
 406                 claimed = true;
 407                 HTTPDocument* doc = (HTTPDocument*)request->GetData();
 408                 HttpSocket* sock = (HttpSocket*)doc->sock;
 409                 sock->Page(doc->GetDocument(), doc->GetResponseCode(), doc->GetExtraHeaders());
 410                 return NULL;
 411         }
 412
 413         void Implements(char* List)
 414         {
 415                 List[I_OnEvent] = List[I_OnRequest] = 1;
 416         }
 417
 418         virtual ~ModuleHttp()
 419         {
 420                 ServerInstance->SE->DelFd(http);
 421         }
 422
 423         virtual Version GetVersion()
 424         {
 425                 return Version(1,0,0,0,VF_VENDOR|VF_SERVICEPROVIDER);
 426         }
 427 };
 428
 429
 430 class ModuleHttpFactory : public ModuleFactory
 431 {
 432  public:
 433         ModuleHttpFactory()
 434         {
 435         }
 436
 437         ~ModuleHttpFactory()
 438         {
 439         }
 440
 441         virtual Module * CreateModule(InspIRCd* Me)
 442         {
 443                 HttpModule = new ModuleHttp(Me);
 444                 return HttpModule;
 445         }
 446 };
 447
 448
 449 extern "C" void * init_module( void )
 450 {
 451         return new ModuleHttpFactory;
 452 }