webcit/context_loop.c

   1 /*
   2  * $Id$
   3  *
   4  * This is the other half of the webserver.  It handles the task of hooking
   5  * up HTTP requests with the sessions they belong to, using HTTP cookies to
   6  * keep track of things.  If the HTTP request doesn't belong to any currently
   7  * active session, a new session is started.
   8  *
   9  */
  10
  11 #include "webcit.h"
  12 #include "webserver.h"
  13 #include "modules_init.h"
  14
  15 /* Only one thread may manipulate SessionList at a time... */
  16 pthread_mutex_t SessionListMutex;
  17
  18 wcsession *SessionList = NULL; /**< our sessions ????*/
  19
  20 pthread_key_t MyConKey;         /**< TSD key for MySession() */
  21 HashList *HttpReqTypes = NULL;
  22 HashList *HttpHeaderHandler = NULL;
  23 extern HashList *HandlerHash;
  24
  25 void DestroyHttpHeaderHandler(void *V)
  26 {
  27         OneHttpHeader *pHdr;
  28         pHdr = (OneHttpHeader*) V;
  29         FreeStrBuf(&pHdr->Val);
  30         free(pHdr);
  31 }
  32
  33 void shutdown_sessions(void)
  34 {
  35         wcsession *sptr;
  36
  37         for (sptr = SessionList; sptr != NULL; sptr = sptr->next) {
  38                         sptr->killthis = 1;
  39         }
  40 }
  41
  42 void do_housekeeping(void)
  43 {
  44         wcsession *sptr, *ss;
  45         wcsession *sessions_to_kill = NULL;
  46         int num_sessions = 0;
  47         static int num_threads = MIN_WORKER_THREADS;
  48
  49         /**
  50          * Lock the session list, moving any candidates for euthanasia into
  51          * a separate list.
  52          */
  53         pthread_mutex_lock(&SessionListMutex);
  54         num_sessions = 0;
  55         for (sptr = SessionList; sptr != NULL; sptr = sptr->next) {
  56                 ++num_sessions;
  57
  58                 /** Kill idle sessions */
  59                 if ((time(NULL) - (sptr->lastreq)) >
  60                    (time_t) WEBCIT_TIMEOUT) {
  61                         sptr->killthis = 1;
  62                 }
  63
  64                 /** Remove sessions flagged for kill */
  65                 if (sptr->killthis) {
  66
  67                         /** remove session from linked list */
  68                         if (sptr == SessionList) {
  69                                 SessionList = SessionList->next;
  70                         }
  71                         else for (ss=SessionList;ss!=NULL;ss=ss->next) {
  72                                 if (ss->next == sptr) {
  73                                         ss->next = ss->next->next;
  74                                 }
  75                         }
  76
  77                         sptr->next = sessions_to_kill;
  78                         sessions_to_kill = sptr;
  79                 }
  80         }
  81         pthread_mutex_unlock(&SessionListMutex);
  82
  83         /**
  84          * Now free up and destroy the culled sessions.
  85          */
  86         while (sessions_to_kill != NULL) {
  87                 lprintf(3, "Destroying session %d\n", sessions_to_kill->wc_session);
  88                 pthread_mutex_lock(&sessions_to_kill->SessionMutex);
  89                 pthread_mutex_unlock(&sessions_to_kill->SessionMutex);
  90                 sptr = sessions_to_kill->next;
  91
  92                 session_destroy_modules(&sessions_to_kill);
  93                 sessions_to_kill = sptr;
  94                 --num_sessions;
  95         }
  96
  97         /**
  98          * If there are more sessions than threads, then we should spawn
  99          * more threads ... up to a predefined maximum.
 100          */
 101         while ( (num_sessions > num_threads)
 102               && (num_threads <= MAX_WORKER_THREADS) ) {
 103                 spawn_another_worker_thread();
 104                 ++num_threads;
 105                 lprintf(3, "There are %d sessions and %d threads active.\n",
 106                         num_sessions, num_threads);
 107         }
 108 }
 109
 110
 111 /*
 112  * Wake up occasionally and clean house
 113  */
 114 void housekeeping_loop(void)
 115 {
 116         while (1) {
 117                 sleeeeeeeeeep(HOUSEKEEPING);
 118                 do_housekeeping();
 119         }
 120 }
 121
 122
 123 /*
 124  * Create a Session id
 125  * Generate a unique WebCit session ID (which is not the same thing as the
 126  * Citadel session ID).
 127  */
 128 int GenerateSessionID(void)
 129 {
 130         static int seq = (-1);
 131
 132         if (seq < 0) {
 133                 seq = (int) time(NULL);
 134         }
 135
 136         return ++seq;
 137 }
 138
 139
 140 /*
 141  * lingering_close() a`la Apache. see
 142  * http://www.apache.org/docs/misc/fin_wait_2.html for rationale
 143  */
 144 int lingering_close(int fd)
 145 {
 146         char buf[SIZ];
 147         int i;
 148         fd_set set;
 149         struct timeval tv, start;
 150
 151         gettimeofday(&start, NULL);
 152         shutdown(fd, 1);
 153         do {
 154                 do {
 155                         gettimeofday(&tv, NULL);
 156                         tv.tv_sec = SLEEPING - (tv.tv_sec - start.tv_sec);
 157                         tv.tv_usec = start.tv_usec - tv.tv_usec;
 158                         if (tv.tv_usec < 0) {
 159                                 tv.tv_sec--;
 160                                 tv.tv_usec += 1000000;
 161                         }
 162                         FD_ZERO(&set);
 163                         FD_SET(fd, &set);
 164                         i = select(fd + 1, &set, NULL, NULL, &tv);
 165                 } while (i == -1 && errno == EINTR);
 166
 167                 if (i <= 0)
 168                         break;
 169
 170                 i = read(fd, buf, sizeof buf);
 171         } while (i != 0 && (i != -1 || errno == EINTR));
 172
 173         return close(fd);
 174 }
 175
 176
 177
 178
 179 /**
 180  * \brief Detects a 'mobile' user agent
 181  */
 182 int is_mobile_ua(char *user_agent) {
 183       if (strstr(user_agent,"iPhone OS") != NULL) {
 184         return 1;
 185       } else if (strstr(user_agent,"Windows CE") != NULL) {
 186         return 1;
 187       } else if (strstr(user_agent,"SymbianOS") != NULL) {
 188         return 1;
 189       } else if (strstr(user_agent, "Opera Mobi") != NULL) {
 190         return 1;
 191       } else if (strstr(user_agent, "Firefox/2.0.0 Opera 9.51 Beta") != NULL) {
 192               /*  For some reason a new install of Opera 9.51beta decided to spoof. */
 193           return 1;
 194           }
 195       return 0;
 196 }
 197
 198
 199
 200 /*
 201  * Look for commonly-found probes of malware such as worms, viruses, trojans, and Microsoft Office.
 202  * Short-circuit these requests so we don't have to send them through the full processing loop.
 203  */
 204 int is_bogus(StrBuf *http_cmd) {////TODO!
 205         const char *url;
 206         int i, max;
 207         const char *bogus_prefixes[] = {
 208                 "/scripts/root.exe",    /* Worms and trojans and viruses, oh my! */
 209                 "/c/winnt",
 210                 "/MSADC/",
 211                 "/_vti",                /* Broken Microsoft DAV implementation */
 212                 "/MSOffice",            /* Stoopid MSOffice thinks everyone is IIS */
 213                 "/nonexistenshit"       /* Exploit found in the wild January 2009 */
 214         };
 215
 216         url = ChrPtr(http_cmd);
 217         if (IsEmptyStr(url)) return(1);
 218         ++url;
 219
 220         max = sizeof(bogus_prefixes) / sizeof(char *);
 221
 222         for (i=0; i<max; ++i) {
 223                 if (!strncasecmp(url, bogus_prefixes[i], strlen(bogus_prefixes[i]))) {
 224                         return(2);
 225                 }
 226         }
 227
 228         return(0);      /* probably ok */
 229 }
 230
 231
 232 int ReadHttpSubject(ParsedHttpHdrs *Hdr, StrBuf *Line, StrBuf *Buf)
 233 {
 234         const char *Args;
 235         void *vLine, *vHandler;
 236         const char *Pos = NULL;
 237
 238
 239         Hdr->ReqLine = Line;
 240         /* The requesttype... GET, POST... */
 241         StrBufExtract_token(Buf, Hdr->ReqLine, 0, ' ');
 242         if (GetHash(HttpReqTypes, SKEY(Buf), &vLine) &&
 243             (vLine != NULL))
 244         {
 245                 Hdr->eReqType = *(long*)vLine;
 246         }
 247         else {
 248                 Hdr->eReqType = eGET;
 249                 return 1;
 250         }
 251         StrBufCutLeft(Hdr->ReqLine, StrLength(Buf) + 1);
 252
 253         /* the HTTP Version... */
 254         StrBufExtract_token(Buf, Hdr->ReqLine, 1, ' ');
 255         StrBufCutRight(Hdr->ReqLine, StrLength(Buf) + 1);
 256         if ((StrLength(Buf) == 0) ||
 257             is_bogus(Hdr->ReqLine)) {
 258                 Hdr->eReqType = eGET;
 259                 return 1;
 260         }
 261
 262         Hdr->this_page = NewStrBufDup(Hdr->ReqLine);
 263         /* chop Filename / query arguments */
 264         Args = strchr(ChrPtr(Hdr->ReqLine), '?');
 265         if (Args == NULL) /* whe're not that picky about params... TODO: this will spoil '&' in filenames.*/
 266                 Args = strchr(ChrPtr(Hdr->ReqLine), '&');
 267         if (Args != NULL) {
 268                 Args ++; /* skip the ? */
 269                 Hdr->PlainArgs = NewStrBufPlain(
 270                         Args,
 271                         StrLength(Hdr->ReqLine) -
 272                         (Args - ChrPtr(Hdr->ReqLine)));
 273                 StrBufCutAt(Hdr->ReqLine, 0, Args - 1);
 274         } /* don't parse them yet, maybe we don't even care... */
 275
 276         /* now lookup what we are going to do with this... */
 277         /* skip first slash */
 278         StrBufExtract_NextToken(Buf, Hdr->ReqLine, &Pos, '/');
 279         do {
 280                 StrBufExtract_NextToken(Buf, Hdr->ReqLine, &Pos, '/');
 281
 282                 GetHash(HandlerHash, SKEY(Buf), &vHandler),
 283                 Hdr->Handler = (WebcitHandler*) vHandler;
 284                 if (Hdr->Handler == NULL)
 285                         break;
 286                 /*
 287                  * If the request is prefixed by "/webcit" then chop that off.  This
 288                  * allows a front end web server to forward all /webcit requests to us
 289                  * while still using the same web server port for other things.
 290                  */
 291                 if ((Hdr->Handler->Flags & URLNAMESPACE) == 0)
 292                         break;
 293         } while (1);
 294         /* remove the handlername from the URL */
 295         if (Pos != NULL) {
 296                 StrBufCutLeft(Hdr->ReqLine,
 297                               Pos - ChrPtr(Hdr->ReqLine));
 298         }
 299 /*
 300         if (Hdr->Handler == NULL)
 301                 return 1;
 302 */
 303         Hdr->HTTPHeaders = NewHash(1, NULL);
 304
 305         return 0;
 306 }
 307
 308 int AnalyseHeaders(ParsedHttpHdrs *Hdr)
 309 {
 310         OneHttpHeader *pHdr;
 311         void *vHdr;
 312         long HKLen;
 313         const char *HashKey;
 314         HashPos *at = GetNewHashPos(Hdr->HTTPHeaders, 0);
 315
 316         while (GetNextHashPos(Hdr->HTTPHeaders, at, &HKLen, &HashKey, &vHdr) &&
 317                (vHdr != NULL)) {
 318                 pHdr = (OneHttpHeader *)vHdr;
 319                 if (pHdr->HaveEvaluator)
 320                         pHdr->H(pHdr->Val, Hdr);
 321
 322         }
 323         DeleteHashPos(&at);
 324         return 0;
 325 }
 326
 327 /*const char *nix(void *vptr) {return ChrPtr( (StrBuf*)vptr);}*/
 328
 329 /*
 330  * Read in the request
 331  */
 332 int ReadHTTPRequset (ParsedHttpHdrs *Hdr)
 333 {
 334         const char *pch, *pchs, *pche;
 335         OneHttpHeader *pHdr;
 336         StrBuf *Line, *LastLine, *HeaderName;
 337         int nLine = 0;
 338         void *vF;
 339         int isbogus = 0;
 340
 341         HeaderName = NewStrBuf();
 342         Hdr->ReadBuf = NewStrBuf();
 343         LastLine = NULL;
 344         do {
 345                 nLine ++;
 346                 Line = NewStrBuf();
 347
 348                 if (ClientGetLine(&Hdr->http_sock, Line, Hdr->ReadBuf, &Hdr->Pos) < 0) return 1;
 349
 350                 if (StrLength(Line) == 0) {
 351                         FreeStrBuf(&Line);
 352                         continue;
 353                 }
 354                 if (nLine == 1) {
 355                         isbogus = ReadHttpSubject(Hdr, Line, HeaderName);
 356                         if (isbogus) break;
 357                         continue;
 358                 }
 359
 360                 /* Do we need to Unfold? */
 361                 if ((LastLine != NULL) &&
 362                     (isspace(*ChrPtr(Line)))) {
 363                         pch = pchs = ChrPtr(Line);
 364                         pche = pchs + StrLength(Line);
 365                         while (isspace(*pch) && (pch < pche))
 366                                 pch ++;
 367                         StrBufCutLeft(Line, pch - pchs);
 368                         StrBufAppendBuf(LastLine, Line, 0);
 369
 370                         FreeStrBuf(&Line);
 371                         continue;
 372                 }
 373
 374                 StrBufSanitizeAscii(Line, '§');
 375                 StrBufExtract_token(HeaderName, Line, 0, ':');
 376
 377                 pchs = ChrPtr(Line);
 378                 pch = pchs + StrLength(HeaderName) + 1;
 379                 pche = pchs + StrLength(Line);
 380                 while (isspace(*pch) && (pch < pche))
 381                         pch ++;
 382                 StrBufCutLeft(Line, pch - pchs);
 383
 384                 StrBufUpCase(HeaderName);
 385
 386                 pHdr = (OneHttpHeader*) malloc(sizeof(OneHttpHeader));
 387                 memset(pHdr, 0, sizeof(OneHttpHeader));
 388                 pHdr->Val = Line;
 389
 390                 if (GetHash(HttpHeaderHandler, SKEY(HeaderName), &vF) &&
 391                     (vF != NULL))
 392                 {
 393                         OneHttpHeader *FHdr = (OneHttpHeader*) vF;
 394                         pHdr->H = FHdr->H;
 395                         pHdr->HaveEvaluator = 1;
 396                 }
 397                 Put(Hdr->HTTPHeaders, SKEY(HeaderName), pHdr, DestroyHttpHeaderHandler);
 398                 LastLine = Line;
 399         } while (Line != NULL);
 400
 401         FreeStrBuf(&HeaderName);
 402
 403         return isbogus;
 404 }
 405
 406
 407
 408 /*
 409  * handle one request
 410  *
 411  * This loop gets called once for every HTTP connection made to WebCit.  At
 412  * this entry point we have an HTTP socket with a browser allegedly on the
 413  * other end, but we have not yet bound to a WebCit session.
 414  *
 415  * The job of this function is to locate the correct session and bind to it,
 416  * or create a session if necessary and bind to it, then run the WebCit
 417  * transaction loop.  Afterwards, we unbind from the session.  When this
 418  * function returns, the worker thread is then free to handle another
 419  * transaction.
 420  */
 421 void context_loop(int *sock)
 422 {
 423         ParsedHttpHdrs Hdr;
 424         int isbogus = 0;
 425         wcsession *TheSession, *sptr;
 426         struct timeval tx_start;
 427         struct timeval tx_finish;
 428
 429         gettimeofday(&tx_start, NULL);          /* start a stopwatch for performance timing */
 430
 431         memset(&Hdr, 0, sizeof(ParsedHttpHdrs));
 432         Hdr.eReqType = eGET;
 433         Hdr.http_sock = *sock;
 434         /*
 435          * Find out what it is that the web browser is asking for
 436          */
 437         isbogus = ReadHTTPRequset(&Hdr);
 438
 439         if (!isbogus)
 440                 isbogus = AnalyseHeaders(&Hdr);
 441 /*
 442         if (isbogus)
 443                 StrBufPlain(ReqLine, HKEY("/404"));
 444 TODO    HKEY("/static/nocookies.html?force_close_session=yes"));
 445 */
 446
 447 /*      dbg_PrintHash(HTTPHeaders, nix, NULL);  */
 448
 449
 450         /* Begin parsing the request. * /
 451 #ifdef TECH_PREVIEW
 452         if ((strncmp(ChrPtr(ReqLine), "/sslg", 5) != 0) &&
 453             (strncmp(ChrPtr(ReqLine), "/static/", 8) != 0) &&
 454             (strncmp(ChrPtr(ReqLine), "/tiny_mce/", 10) != 0) &&
 455             (strncmp(ChrPtr(ReqLine), "/wholist_section", 16) != 0) &&
 456             (strstr(ChrPtr(ReqLine), "wholist_section") == NULL)) {
 457 #endif
 458                 lprintf(5, "HTTP: %s %s\n", ReqStrs[Hdr.eReqType], ChrPtr(ReqLine));
 459 #ifdef TECH_PREVIEW
 460         }
 461 #endif
 462
 463 */
 464
 465         /**
 466          * See if there's an existing session open with the desired ID or user/pass
 467          */
 468         TheSession = NULL;
 469
 470         if (TheSession == NULL) {
 471                 pthread_mutex_lock(&SessionListMutex);
 472                 for (sptr = SessionList;
 473                      ((sptr != NULL) && (TheSession == NULL));
 474                       sptr = sptr->next) {
 475
 476                         /** If HTTP-AUTH, look for a session with matching credentials * /
 477                         if ( (////TODO check auth type here...
 478                              &&(!strcasecmp(ChrPtr(sptr->httpauth_user), httpauth_user))
 479                              &&(!strcasecmp(ChrPtr(sptr->httpauth_pass), httpauth_pass)) ) {
 480                                 TheSession = sptr;
 481                         }
 482
 483                         /** If cookie-session, look for a session with matching session ID */
 484                         if ( (Hdr.desired_session != 0) && (sptr->wc_session == Hdr.desired_session)) {
 485                                 TheSession = sptr;
 486                         }
 487
 488                 }
 489                 pthread_mutex_unlock(&SessionListMutex);
 490         }
 491
 492         /**
 493          * Create a new session if we have to
 494          */
 495         if (TheSession == NULL) {
 496                 lprintf(3, "Creating a new session\n");
 497                 TheSession = (wcsession *)
 498                         malloc(sizeof(wcsession));
 499                 memset(TheSession, 0, sizeof(wcsession));
 500                 TheSession->Hdr = &Hdr;
 501                 TheSession->serv_sock = (-1);
 502                 TheSession->chat_sock = (-1);
 503
 504                 /* If we're recreating a session that expired, it's best to give it the same
 505                  * session number that it had before.  The client browser ought to pick up
 506                  * the new session number and start using it, but in some rare situations it
 507                  * doesn't, and that's a Bad Thing because it causes lots of spurious sessions
 508                  * to get created.
 509                  */
 510                 if (Hdr.desired_session == 0) {
 511                         TheSession->wc_session = GenerateSessionID();
 512                 }
 513                 else {
 514                         TheSession->wc_session = Hdr.desired_session;
 515                 }
 516 /*
 517                 TheSession->httpauth_user = NewStrBufPlain(httpauth_user, -1);
 518                         TheSession->httpauth_pass = NewStrBufPlain(httpauth_user, -1);
 519 */
 520                 pthread_setspecific(MyConKey, (void *)TheSession);
 521                 session_new_modules(TheSession);
 522
 523                 pthread_mutex_init(&TheSession->SessionMutex, NULL);
 524                 pthread_mutex_lock(&SessionListMutex);
 525                 TheSession->nonce = rand();
 526                 TheSession->next = SessionList;
 527                 TheSession->is_mobile = -1;
 528                 SessionList = TheSession;
 529                 pthread_mutex_unlock(&SessionListMutex);
 530         }
 531
 532         /*
 533          * A future improvement might be to check the session integrity
 534          * at this point before continuing.
 535          */
 536
 537         /*
 538          * Bind to the session and perform the transaction
 539          */
 540         pthread_mutex_lock(&TheSession->SessionMutex);          /* bind */
 541         pthread_setspecific(MyConKey, (void *)TheSession);
 542
 543         TheSession->lastreq = time(NULL);                       /* log */
 544         TheSession->Hdr = &Hdr;
 545
 546         session_attach_modules(TheSession);
 547         session_loop();                         /* do transaction */
 548
 549
 550         /* How long did this transaction take? */
 551         gettimeofday(&tx_finish, NULL);
 552
 553         lprintf(9, "Transaction [%s] completed in %ld.%06ld seconds.\n",
 554                 ChrPtr(Hdr.this_page),
 555                 ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) / 1000000,
 556                 ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) % 1000000
 557         );
 558
 559         session_detach_modules(TheSession);
 560
 561         TheSession->Hdr = NULL;
 562         pthread_mutex_unlock(&TheSession->SessionMutex);        /* unbind */
 563
 564         http_destroy_modules(&Hdr);
 565 }
 566
 567 void tmplput_nonce(StrBuf *Target, WCTemplputParams *TP)
 568 {
 569         wcsession *WCC = WC;
 570         StrBufAppendPrintf(Target, "%ld",
 571                            (WCC != NULL)? WCC->nonce:0);
 572 }
 573
 574 void tmplput_current_user(StrBuf *Target, WCTemplputParams *TP)
 575 {
 576         StrBufAppendTemplate(Target, TP, WC->wc_fullname, 0);
 577 }
 578
 579 void tmplput_current_room(StrBuf *Target, WCTemplputParams *TP)
 580 {
 581         StrBufAppendTemplate(Target, TP, WC->wc_roomname, 0);
 582 }
 583
 584 void Header_HandleContentLength(StrBuf *Line, ParsedHttpHdrs *hdr)
 585 {
 586         hdr->ContentLength = StrToi(Line);
 587 }
 588
 589 void Header_HandleContentType(StrBuf *Line, ParsedHttpHdrs *hdr)
 590 {
 591         hdr->ContentType = Line;
 592 }
 593
 594 void Header_HandleUserAgent(StrBuf *Line, ParsedHttpHdrs *hdr)
 595 {
 596         hdr->user_agent = Line;
 597 #ifdef TECH_PREVIEW
 598 /* TODO: do this later on session creating
 599         if ((WCC->is_mobile < 0) && is_mobile_ua(&buf[12])) {
 600                 WCC->is_mobile = 1;
 601         }
 602         else {
 603                 WCC->is_mobile = 0;
 604         }
 605 */
 606 #endif
 607 }
 608
 609
 610 void Header_HandleHost(StrBuf *Line, ParsedHttpHdrs *hdr)
 611 {
 612         if ((follow_xff) && (hdr->http_host != NULL))
 613                 return;
 614         else
 615                 hdr->http_host = Line;
 616 }
 617
 618 void Header_HandleXFFHost(StrBuf *Line, ParsedHttpHdrs *hdr)
 619 {
 620         if (follow_xff)
 621                 hdr->http_host = Line;
 622 }
 623
 624
 625 void Header_HandleXFF(StrBuf *Line, ParsedHttpHdrs *hdr)
 626 {
 627         hdr->browser_host = Line;
 628
 629         while (StrBufNum_tokens(hdr->browser_host, ',') > 1) {
 630                 StrBufRemove_token(hdr->browser_host, 0, ',');
 631         }
 632         StrBufTrim(hdr->browser_host);
 633 }
 634
 635 void Header_HandleIfModSince(StrBuf *Line, ParsedHttpHdrs *hdr)
 636 {
 637         hdr->if_modified_since = httpdate_to_timestamp(Line);
 638 }
 639
 640 void Header_HandleAcceptEncoding(StrBuf *Line, ParsedHttpHdrs *hdr)
 641 {
 642         /*
 643          * Can we compress?
 644          */
 645         if (strstr(&ChrPtr(Line)[16], "gzip")) {
 646                 hdr->gzip_ok = 1;
 647         }
 648 }
 649 const char *ReqStrs[eNONE] = {
 650         "GET",
 651         "POST",
 652         "OPTIONS",
 653         "PROPFIND",
 654         "PUT",
 655         "DELETE",
 656         "HEAD",
 657         "MOVE",
 658         "COPY"
 659 };
 660
 661 void
 662 ServerStartModule_CONTEXT
 663 (void)
 664 {
 665         long *v;
 666         HttpReqTypes = NewHash(1, NULL);
 667         HttpHeaderHandler = NewHash(1, NULL);
 668
 669         v = malloc(sizeof(long));
 670         *v = eGET;
 671         Put(HttpReqTypes, HKEY("GET"), v, NULL);
 672
 673         v = malloc(sizeof(long));
 674         *v = ePOST;
 675         Put(HttpReqTypes, HKEY("POST"), v, NULL);
 676
 677         v = malloc(sizeof(long));
 678         *v = eOPTIONS;
 679         Put(HttpReqTypes, HKEY("OPTIONS"), v, NULL);
 680
 681         v = malloc(sizeof(long));
 682         *v = ePROPFIND;
 683         Put(HttpReqTypes, HKEY("PROPFIND"), v, NULL);
 684
 685         v = malloc(sizeof(long));
 686         *v = ePUT;
 687         Put(HttpReqTypes, HKEY("PUT"), v, NULL);
 688
 689         v = malloc(sizeof(long));
 690         *v = eDELETE;
 691         Put(HttpReqTypes, HKEY("DELETE"), v, NULL);
 692
 693         v = malloc(sizeof(long));
 694         *v = eHEAD;
 695         Put(HttpReqTypes, HKEY("HEAD"), v, NULL);
 696
 697         v = malloc(sizeof(long));
 698         *v = eMOVE;
 699         Put(HttpReqTypes, HKEY("MOVE"), v, NULL);
 700
 701         v = malloc(sizeof(long));
 702         *v = eCOPY;
 703         Put(HttpReqTypes, HKEY("COPY"), v, NULL);
 704 }
 705
 706 void
 707 ServerShutdownModule_CONTEXT
 708 (void)
 709 {
 710         DeleteHash(&HttpReqTypes);
 711         DeleteHash(&HttpHeaderHandler);
 712 }
 713
 714 void RegisterHeaderHandler(const char *Name, long Len, Header_Evaluator F)
 715 {
 716         OneHttpHeader *pHdr;
 717         pHdr = (OneHttpHeader*) malloc(sizeof(OneHttpHeader));
 718         memset(pHdr, 0, sizeof(OneHttpHeader));
 719         pHdr->H = F;
 720         Put(HttpHeaderHandler, Name, Len, pHdr, DestroyHttpHeaderHandler);
 721 }
 722 extern void blank_page(void); ///TODO: remove me
 723 void
 724 InitModule_CONTEXT
 725 (void)
 726 {
 727         RegisterHeaderHandler(HKEY("CONTENT-LENGTH"), Header_HandleContentLength);
 728         RegisterHeaderHandler(HKEY("CONTENT-TYPE"), Header_HandleContentType);
 729         RegisterHeaderHandler(HKEY("USER-AGENT"), Header_HandleUserAgent);
 730         RegisterHeaderHandler(HKEY("X-FORWARDED-HOST"), Header_HandleXFFHost);
 731         RegisterHeaderHandler(HKEY("HOST"), Header_HandleHost);
 732         RegisterHeaderHandler(HKEY("X-FORWARDED-FOR"), Header_HandleXFF);
 733         RegisterHeaderHandler(HKEY("ACCEPT-ENCODING"), Header_HandleAcceptEncoding);
 734         RegisterHeaderHandler(HKEY("IF-MODIFIED-SINCE"), Header_HandleIfModSince);
 735
 736         RegisterNamespace("CURRENT_USER", 0, 1, tmplput_current_user, CTX_NONE);
 737         RegisterNamespace("CURRENT_ROOM", 0, 1, tmplput_current_room, CTX_NONE);
 738         RegisterNamespace("NONCE", 0, 0, tmplput_nonce, 0);
 739
 740
 741
 742         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS|BOGUS);
 743
 744         WebcitAddUrlHandler(HKEY("webcit"), blank_page, URLNAMESPACE);
 745 }
 746
 747
 748
 749 void
 750 HttpDestroyModule_CONTEXT
 751 (ParsedHttpHdrs *httpreq)
 752 {
 753         FreeStrBuf(&httpreq->ReqLine);
 754         FreeStrBuf(&httpreq->ReadBuf);
 755         FreeStrBuf(&httpreq->PlainArgs);
 756         FreeStrBuf(&httpreq->this_page);
 757         DeleteHash(&httpreq->HTTPHeaders);
 758
 759 }