src/modules/m_httpd.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include <algorithm>
  16 #include "modules.h"
  17 #include "httpd.h"
  18
  19 /* $ModDesc: Provides HTTP serving facilities to modules */
  20
  21 class ModuleHttpServer;
  22
  23 static ModuleHttpServer* HttpModule;
  24 static bool claimed;
  25
  26 /** HTTP socket states
  27  */
  28 enum HttpState
  29 {
  30         HTTP_LISTEN = 0,
  31         HTTP_SERVE_WAIT_REQUEST = 1,
  32         HTTP_SERVE_RECV_POSTDATA = 2,
  33         HTTP_SERVE_SEND_DATA = 3
  34 };
  35
  36 class HttpServerSocket;
  37
  38 /** This class is used to handle HTTP socket timeouts
  39  */
  40 class HttpServerTimeout : public InspTimer
  41 {
  42  private:
  43         /** HttpServerSocket we are attached to
  44          */
  45         HttpServerSocket* s;
  46         /** Socketengine the file descriptor is in
  47          */
  48         SocketEngine* SE;
  49  public:
  50         /** Attach timeout to HttpServerSocket
  51          */
  52         HttpServerTimeout(HttpServerSocket* sock, SocketEngine* engine);
  53         /** Handle timer tick
  54          */
  55         void Tick(time_t TIME);
  56 };
  57
  58 /** A socket used for HTTP transport
  59  */
  60 class HttpServerSocket : public InspSocket
  61 {
  62         FileReader* index;
  63         HttpState InternalState;
  64         std::stringstream headers;
  65         std::string postdata;
  66         std::string request_type;
  67         std::string uri;
  68         std::string http_version;
  69         unsigned int postsize;
  70         HttpServerTimeout* Timeout;
  71
  72  public:
  73
  74         HttpServerSocket(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)
  75         {
  76                 InternalState = HTTP_LISTEN;
  77                 Timeout = NULL;
  78         }
  79
  80         HttpServerSocket(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 HttpServerTimeout(this, Instance->SE);
  84                 Instance->Timers->AddTimer(Timeout);
  85         }
  86
  87         FileReader* GetIndex()
  88         {
  89                 return index;
  90         }
  91
  92         ~HttpServerSocket()
  93         {
  94                 if (Timeout)
  95                 {
  96                         if (Instance->Time() < Timeout->GetTimer())
  97                                 Instance->Timers->DelTimer(Timeout);
  98                         Timeout = NULL;
  99                 }
 100         }
 101
 102         virtual int OnIncomingConnection(int newsock, char* ip)
 103         {
 104                 if (InternalState == HTTP_LISTEN)
 105                 {
 106                         HttpServerSocket* s = new HttpServerSocket(this->Instance, newsock, ip, index);
 107                         s = s; /* Stop GCC whining */
 108                 }
 109                 return true;
 110         }
 111
 112         virtual void OnClose()
 113         {
 114         }
 115
 116         std::string Response(int response)
 117         {
 118                 switch (response)
 119                 {
 120                         case 100:
 121                                 return "CONTINUE";
 122                         case 101:
 123                                 return "SWITCHING PROTOCOLS";
 124                         case 200:
 125                                 return "OK";
 126                         case 201:
 127                                 return "CREATED";
 128                         case 202:
 129                                 return "ACCEPTED";
 130                         case 203:
 131                                 return "NON-AUTHORITATIVE INFORMATION";
 132                         case 204:
 133                                 return "NO CONTENT";
 134                         case 205:
 135                                 return "RESET CONTENT";
 136                         case 206:
 137                                 return "PARTIAL CONTENT";
 138                         case 300:
 139                                 return "MULTIPLE CHOICES";
 140                         case 301:
 141                                 return "MOVED PERMENANTLY";
 142                         case 302:
 143                                 return "FOUND";
 144                         case 303:
 145                                 return "SEE OTHER";
 146                         case 304:
 147                                 return "NOT MODIFIED";
 148                         case 305:
 149                                 return "USE PROXY";
 150                         case 307:
 151                                 return "TEMPORARY REDIRECT";
 152                         case 400:
 153                                 return "BAD REQUEST";
 154                         case 401:
 155                                 return "UNAUTHORIZED";
 156                         case 402:
 157                                 return "PAYMENT REQUIRED";
 158                         case 403:
 159                                 return "FORBIDDEN";
 160                         case 404:
 161                                 return "NOT FOUND";
 162                         case 405:
 163                                 return "METHOD NOT ALLOWED";
 164                         case 406:
 165                                 return "NOT ACCEPTABLE";
 166                         case 407:
 167                                 return "PROXY AUTHENTICATION REQUIRED";
 168                         case 408:
 169                                 return "REQUEST TIMEOUT";
 170                         case 409:
 171                                 return "CONFLICT";
 172                         case 410:
 173                                 return "GONE";
 174                         case 411:
 175                                 return "LENGTH REQUIRED";
 176                         case 412:
 177                                 return "PRECONDITION FAILED";
 178                         case 413:
 179                                 return "REQUEST ENTITY TOO LARGE";
 180                         case 414:
 181                                 return "REQUEST-URI TOO LONG";
 182                         case 415:
 183                                 return "UNSUPPORTED MEDIA TYPE";
 184                         case 416:
 185                                 return "REQUESTED RANGE NOT SATISFIABLE";
 186                         case 417:
 187                                 return "EXPECTATION FAILED";
 188                         case 500:
 189                                 return "INTERNAL SERVER ERROR";
 190                         case 501:
 191                                 return "NOT IMPLEMENTED";
 192                         case 502:
 193                                 return "BAD GATEWAY";
 194                         case 503:
 195                                 return "SERVICE UNAVAILABLE";
 196                         case 504:
 197                                 return "GATEWAY TIMEOUT";
 198                         case 505:
 199                                 return "HTTP VERSION NOT SUPPORTED";
 200                         default:
 201                                 return "WTF";
 202                         break;
 203
 204                 }
 205         }
 206
 207         void SendHeaders(unsigned long size, int response, const std::string &extraheaders)
 208         {
 209                 time_t local = this->Instance->Time();
 210                 struct tm *timeinfo = gmtime(&local);
 211                 this->Write("HTTP/1.1 "+ConvToStr(response)+" "+Response(response)+"\r\nDate: ");
 212                 this->Write(asctime(timeinfo));
 213                 if (extraheaders.empty())
 214                 {
 215                         this->Write("Content-Type: text/html\r\n");
 216                 }
 217                 else
 218                 {
 219                         this->Write(extraheaders);
 220                 }
 221                 this->Write("Server: InspIRCd/m_httpd.so/1.1\r\nContent-Length: "+ConvToStr(size)+
 222                                 "\r\nConnection: close\r\n\r\n");
 223         }
 224
 225         virtual bool OnDataReady()
 226         {
 227                 char* data = this->Read();
 228
 229                 /* Check that the data read is a valid pointer and it has some content */
 230                 if (data && *data)
 231                 {
 232                         headers << data;
 233
 234                         if (headers.str().find("\r\n\r\n") != std::string::npos)
 235                         {
 236                                 if (request_type.empty())
 237                                 {
 238                                         headers >> request_type;
 239                                         headers >> uri;
 240                                         headers >> http_version;
 241
 242                                         std::transform(request_type.begin(), request_type.end(), request_type.begin(), ::toupper);
 243                                         std::transform(http_version.begin(), http_version.end(), http_version.begin(), ::toupper);
 244                                 }
 245
 246                                 if ((InternalState == HTTP_SERVE_WAIT_REQUEST) && (request_type == "POST"))
 247                                 {
 248                                         /* Do we need to fetch postdata? */
 249                                         postdata.clear();
 250                                         InternalState = HTTP_SERVE_RECV_POSTDATA;
 251                                         std::string header_item;
 252                                         while (headers >> header_item)
 253                                         {
 254                                                 if (header_item == "Content-Length:")
 255                                                 {
 256                                                         headers >> header_item;
 257                                                         postsize = atoi(header_item.c_str());
 258                                                 }
 259                                         }
 260                                         if (!postsize)
 261                                         {
 262                                                 InternalState = HTTP_SERVE_SEND_DATA;
 263                                                 SendHeaders(0, 400, "");
 264                                                 Timeout = new HttpServerTimeout(this, Instance->SE);
 265                                                 Instance->Timers->AddTimer(Timeout);
 266                                         }
 267                                         else
 268                                         {
 269                                                 std::string::size_type x = headers.str().find("\r\n\r\n");
 270                                                 postdata = headers.str().substr(x+4, headers.str().length());
 271                                                 /* Get content length and store */
 272                                                 if (postdata.length() >= postsize)
 273                                                         ServeData();
 274                                         }
 275                                 }
 276                                 else if (InternalState == HTTP_SERVE_RECV_POSTDATA)
 277                                 {
 278                                         /* Add postdata, once we have it all, send the event */
 279                                         postdata.append(data);
 280                                         if (postdata.length() >= postsize)
 281                                                 ServeData();
 282                                 }
 283                                 else
 284                                 {
 285                                         ServeData();
 286                                 }
 287                                 return true;
 288                         }
 289                         return true;
 290                 }
 291                 else
 292                 {
 293                         return false;
 294                 }
 295         }
 296
 297         void ServeData()
 298         {
 299                 /* Headers are complete */
 300                 InternalState = HTTP_SERVE_SEND_DATA;
 301
 302                 Instance->Timers->DelTimer(Timeout);
 303                 Timeout = NULL;
 304
 305                 if ((http_version != "HTTP/1.1") && (http_version != "HTTP/1.0"))
 306                 {
 307                         SendHeaders(0, 505, "");
 308                 }
 309                 else
 310                 {
 311                         if ((request_type == "GET") && (uri == "/"))
 312                         {
 313                                 SendHeaders(index->ContentSize(), 200, "");
 314                                 this->Write(index->Contents());
 315                         }
 316                         else
 317                         {
 318                                 claimed = false;
 319                                 HTTPRequest httpr(request_type,uri,&headers,this,this->GetIP(),postdata);
 320                                 Event e((char*)&httpr, (Module*)HttpModule, "httpd_url");
 321                                 e.Send(this->Instance);
 322                                 if (!claimed)
 323                                 {
 324                                         SendHeaders(0, 404, "");
 325                                 }
 326                         }
 327                 }
 328                 Timeout = new HttpServerTimeout(this, Instance->SE);
 329                 Instance->Timers->AddTimer(Timeout);
 330         }
 331
 332         void Page(std::stringstream* n, int response, std::string& extraheaders)
 333         {
 334                 SendHeaders(n->str().length(), response, extraheaders);
 335                 this->Write(n->str());
 336         }
 337 };
 338
 339 HttpServerTimeout::HttpServerTimeout(HttpServerSocket* sock, SocketEngine* engine) : InspTimer(60, time(NULL)), s(sock), SE(engine)
 340 {
 341 }
 342
 343 void HttpServerTimeout::Tick(time_t TIME)
 344 {
 345         SE->DelFd(s);
 346         s->Close();
 347 }
 348
 349 class ModuleHttpServer : public Module
 350 {
 351         std::vector<HttpServerSocket*> httpsocks;
 352  public:
 353
 354         void ReadConfig()
 355         {
 356                 int port;
 357                 std::string host;
 358                 std::string bindip;
 359                 std::string indexfile;
 360                 FileReader* index;
 361                 HttpServerSocket* http;
 362                 ConfigReader c(ServerInstance);
 363
 364                 httpsocks.clear();
 365
 366                 for (int i = 0; i < c.Enumerate("http"); i++)
 367                 {
 368                         host = c.ReadValue("http", "host", i);
 369                         bindip = c.ReadValue("http", "ip", i);
 370                         port = c.ReadInteger("http", "port", i, true);
 371                         indexfile = c.ReadValue("http", "index", i);
 372                         index = new FileReader(ServerInstance, indexfile);
 373                         if (!index->Exists())
 374                                 throw ModuleException("Can't read index file: "+indexfile);
 375                         http = new HttpServerSocket(ServerInstance, bindip, port, true, 0, index);
 376                         httpsocks.push_back(http);
 377                 }
 378         }
 379
 380         ModuleHttpServer(InspIRCd* Me) : Module(Me)
 381         {
 382                 ReadConfig();
 383         }
 384
 385         void OnEvent(Event* event)
 386         {
 387         }
 388
 389         char* OnRequest(Request* request)
 390         {
 391                 claimed = true;
 392                 HTTPDocument* doc = (HTTPDocument*)request->GetData();
 393                 HttpServerSocket* sock = (HttpServerSocket*)doc->sock;
 394                 sock->Page(doc->GetDocument(), doc->GetResponseCode(), doc->GetExtraHeaders());
 395                 return NULL;
 396         }
 397
 398         void Implements(char* List)
 399         {
 400                 List[I_OnEvent] = List[I_OnRequest] = 1;
 401         }
 402
 403         virtual ~ModuleHttpServer()
 404         {
 405                 for (size_t i = 0; i < httpsocks.size(); i++)
 406                 {
 407                         ServerInstance->SE->DelFd(httpsocks[i]);
 408                         httpsocks[i]->Close();
 409                         delete httpsocks[i]->GetIndex();
 410                 }
 411                 ServerInstance->InspSocketCull();
 412         }
 413
 414         virtual Version GetVersion()
 415         {
 416                 return Version(1,1,0,0,VF_VENDOR|VF_SERVICEPROVIDER,API_VERSION);
 417         }
 418 };
 419
 420 MODULE_INIT(ModuleHttpServer)