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