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