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                 Hdr->PlainArgs = NewStrBufPlain(
 269                         Args,
 270                         StrLength(Hdr->ReqLine) -
 271                         (Args - ChrPtr(Hdr->ReqLine)));
 272                 StrBufCutAt(Hdr->ReqLine, 0, Args);
 273         } /* don't parse them yet, maybe we don't even care... */
 274
 275         /* now lookup what we are going to do with this... */
 276         /* skip first slash */
 277         StrBufExtract_NextToken(Buf, Hdr->ReqLine, &Pos, '/');
 278         do {
 279                 StrBufExtract_NextToken(Buf, Hdr->ReqLine, &Pos, '/');
 280
 281                 GetHash(HandlerHash, SKEY(Buf), &vHandler),
 282                 Hdr->Handler = (WebcitHandler*) vHandler;
 283                 if (Hdr->Handler == NULL)
 284                         break;
 285                 /* are we about to ignore some prefix like webcit/ ? */
 286                 if ((Hdr->Handler->Flags & URLNAMESPACE) == 0)
 287                         break;
 288         } while (1);
 289         /* remove the handlername from the URL */
 290         if (Pos != NULL) {
 291                 StrBufCutLeft(Hdr->ReqLine,
 292                               Pos - ChrPtr(Hdr->ReqLine));
 293         }
 294 /*
 295         if (Hdr->Handler == NULL)
 296                 return 1;
 297 */
 298         Hdr->HTTPHeaders = NewHash(1, NULL);
 299
 300         return 0;
 301 }
 302
 303 int AnalyseHeaders(ParsedHttpHdrs *Hdr)
 304 {
 305         OneHttpHeader *pHdr;
 306         void *vHdr;
 307         long HKLen;
 308         const char *HashKey;
 309         HashPos *at = GetNewHashPos(Hdr->HTTPHeaders, 0);
 310
 311         while (GetNextHashPos(Hdr->HTTPHeaders, at, &HKLen, &HashKey, &vHdr) &&
 312                (vHdr != NULL)) {
 313                 pHdr = (OneHttpHeader *)vHdr;
 314                 if (pHdr->HaveEvaluator)
 315                         pHdr->H(pHdr->Val, Hdr);
 316
 317         }
 318         DeleteHashPos(&at);
 319         return 0;
 320 }
 321
 322 /*const char *nix(void *vptr) {return ChrPtr( (StrBuf*)vptr);}*/
 323
 324 /*
 325  * Read in the request
 326  */
 327 int ReadHTTPRequset (ParsedHttpHdrs *Hdr)
 328 {
 329         const char *pch, *pchs, *pche;
 330         OneHttpHeader *pHdr;
 331         StrBuf *Line, *LastLine, *HeaderName;
 332         int nLine = 0;
 333         void *vF;
 334         int isbogus = 0;
 335
 336         HeaderName = NewStrBuf();
 337         Hdr->ReadBuf = NewStrBuf();
 338         LastLine = NULL;
 339         do {
 340                 nLine ++;
 341                 Line = NewStrBuf();
 342
 343                 if (ClientGetLine(&Hdr->http_sock, Line, Hdr->ReadBuf, &Hdr->Pos) < 0) return 1;
 344
 345                 if (StrLength(Line) == 0) {
 346                         FreeStrBuf(&Line);
 347                         continue;
 348                 }
 349                 if (nLine == 1) {
 350                         isbogus = ReadHttpSubject(Hdr, Line, HeaderName);
 351                         if (isbogus) break;
 352                         continue;
 353                 }
 354
 355                 /* Do we need to Unfold? */
 356                 if ((LastLine != NULL) &&
 357                     (isspace(*ChrPtr(Line)))) {
 358                         pch = pchs = ChrPtr(Line);
 359                         pche = pchs + StrLength(Line);
 360                         while (isspace(*pch) && (pch < pche))
 361                                 pch ++;
 362                         StrBufCutLeft(Line, pch - pchs);
 363                         StrBufAppendBuf(LastLine, Line, 0);
 364                         FreeStrBuf(&Line);
 365                         continue;
 366                 }
 367
 368                 StrBufSanitizeAscii(Line, '§');
 369                 StrBufExtract_token(HeaderName, Line, 0, ':');
 370
 371                 pchs = ChrPtr(Line);
 372                 pch = pchs + StrLength(HeaderName) + 1;
 373                 pche = pchs + StrLength(Line);
 374                 while (isspace(*pch) && (pch < pche))
 375                         pch ++;
 376                 StrBufCutLeft(Line, pch - pchs);
 377
 378                 StrBufUpCase(HeaderName);
 379
 380                 pHdr = (OneHttpHeader*) malloc(sizeof(OneHttpHeader));
 381                 memset(pHdr, 0, sizeof(OneHttpHeader));
 382                 pHdr->Val = Line;
 383
 384                 if (GetHash(HttpHeaderHandler, SKEY(HeaderName), &vF) &&
 385                     (vF != NULL))
 386                 {
 387                         OneHttpHeader *FHdr = (OneHttpHeader*) vF;
 388                         pHdr->H = FHdr->H;
 389                         pHdr->HaveEvaluator = 1;
 390                 }
 391                 Put(Hdr->HTTPHeaders, SKEY(HeaderName), pHdr, DestroyHttpHeaderHandler);
 392                 LastLine = Line;
 393         } while (Line != NULL);
 394
 395         FreeStrBuf(&HeaderName);
 396
 397         return isbogus;
 398 }
 399
 400
 401
 402 /*
 403  * handle one request
 404  *
 405  * This loop gets called once for every HTTP connection made to WebCit.  At
 406  * this entry point we have an HTTP socket with a browser allegedly on the
 407  * other end, but we have not yet bound to a WebCit session.
 408  *
 409  * The job of this function is to locate the correct session and bind to it,
 410  * or create a session if necessary and bind to it, then run the WebCit
 411  * transaction loop.  Afterwards, we unbind from the session.  When this
 412  * function returns, the worker thread is then free to handle another
 413  * transaction.
 414  */
 415 void context_loop(int *sock)
 416 {
 417         ParsedHttpHdrs Hdr;
 418         int isbogus = 0;
 419         wcsession *TheSession, *sptr;
 420         struct timeval tx_start;
 421         struct timeval tx_finish;
 422
 423         gettimeofday(&tx_start, NULL);          /* start a stopwatch for performance timing */
 424
 425         memset(&Hdr, 0, sizeof(ParsedHttpHdrs));
 426         Hdr.eReqType = eGET;
 427         Hdr.http_sock = *sock;
 428         /*
 429          * Find out what it is that the web browser is asking for
 430          */
 431         isbogus = ReadHTTPRequset(&Hdr);
 432
 433         if (!isbogus)
 434                 isbogus = AnalyseHeaders(&Hdr);
 435 /*
 436         if (isbogus)
 437                 StrBufPlain(ReqLine, HKEY("/404"));
 438 */
 439
 440 /*      dbg_PrintHash(HTTPHeaders, nix, NULL);  */
 441
 442
 443 ///HttpHeaderHandler
 444
 445
 446
 447
 448
 449         /*
 450          * If the request is prefixed by "/webcit" then chop that off.  This
 451          * allows a front end web server to forward all /webcit requests to us
 452          * while still using the same web server port for other things.
 453          * /
 454         if (!isbogus &&
 455             (StrLength(ReqLine) >= 8) &&
 456             (strstr(ChrPtr(ReqLine), "/webcit/")) ) {
 457                 StrBufCutLeft(ReqLine, 7);
 458         }
 459
 460         /* Begin parsing the request. * /
 461 #ifdef TECH_PREVIEW
 462         if ((strncmp(ChrPtr(ReqLine), "/sslg", 5) != 0) &&
 463             (strncmp(ChrPtr(ReqLine), "/static/", 8) != 0) &&
 464             (strncmp(ChrPtr(ReqLine), "/tiny_mce/", 10) != 0) &&
 465             (strncmp(ChrPtr(ReqLine), "/wholist_section", 16) != 0) &&
 466             (strstr(ChrPtr(ReqLine), "wholist_section") == NULL)) {
 467 #endif
 468                 lprintf(5, "HTTP: %s %s\n", ReqStrs[Hdr.eReqType], ChrPtr(ReqLine));
 469 #ifdef TECH_PREVIEW
 470         }
 471 #endif
 472
 473 */
 474
 475         /**
 476          * See if there's an existing session open with the desired ID or user/pass
 477          */
 478         TheSession = NULL;
 479
 480         if (TheSession == NULL) {
 481                 pthread_mutex_lock(&SessionListMutex);
 482                 for (sptr = SessionList;
 483                      ((sptr != NULL) && (TheSession == NULL));
 484                       sptr = sptr->next) {
 485
 486                         /** If HTTP-AUTH, look for a session with matching credentials * /
 487                         if ( (////TODO check auth type here...
 488                              &&(!strcasecmp(ChrPtr(sptr->httpauth_user), httpauth_user))
 489                              &&(!strcasecmp(ChrPtr(sptr->httpauth_pass), httpauth_pass)) ) {
 490                                 TheSession = sptr;
 491                         }
 492
 493                         /** If cookie-session, look for a session with matching session ID */
 494                         if ( (Hdr.desired_session != 0) && (sptr->wc_session == Hdr.desired_session)) {
 495                                 TheSession = sptr;
 496                         }
 497
 498                 }
 499                 pthread_mutex_unlock(&SessionListMutex);
 500         }
 501
 502         /**
 503          * Create a new session if we have to
 504          */
 505         if (TheSession == NULL) {
 506                 lprintf(3, "Creating a new session\n");
 507                 TheSession = (wcsession *)
 508                         malloc(sizeof(wcsession));
 509                 memset(TheSession, 0, sizeof(wcsession));
 510                 TheSession->Hdr = &Hdr;
 511                 TheSession->serv_sock = (-1);
 512                 TheSession->chat_sock = (-1);
 513
 514                 /* If we're recreating a session that expired, it's best to give it the same
 515                  * session number that it had before.  The client browser ought to pick up
 516                  * the new session number and start using it, but in some rare situations it
 517                  * doesn't, and that's a Bad Thing because it causes lots of spurious sessions
 518                  * to get created.
 519                  */
 520                 if (Hdr.desired_session == 0) {
 521                         TheSession->wc_session = GenerateSessionID();
 522                 }
 523                 else {
 524                         TheSession->wc_session = Hdr.desired_session;
 525                 }
 526 /*
 527                 TheSession->httpauth_user = NewStrBufPlain(httpauth_user, -1);
 528                         TheSession->httpauth_pass = NewStrBufPlain(httpauth_user, -1);
 529 */
 530                 pthread_setspecific(MyConKey, (void *)TheSession);
 531                 session_new_modules(TheSession);
 532
 533                 pthread_mutex_init(&TheSession->SessionMutex, NULL);
 534                 pthread_mutex_lock(&SessionListMutex);
 535                 TheSession->nonce = rand();
 536                 TheSession->next = SessionList;
 537                 TheSession->is_mobile = -1;
 538                 SessionList = TheSession;
 539                 pthread_mutex_unlock(&SessionListMutex);
 540         }
 541
 542         /*
 543          * A future improvement might be to check the session integrity
 544          * at this point before continuing.
 545          */
 546
 547         /*
 548          * Bind to the session and perform the transaction
 549          */
 550         pthread_mutex_lock(&TheSession->SessionMutex);          /* bind */
 551         pthread_setspecific(MyConKey, (void *)TheSession);
 552
 553         TheSession->lastreq = time(NULL);                       /* log */
 554         TheSession->Hdr = &Hdr;
 555
 556         session_attach_modules(TheSession);
 557         session_loop();                         /* do transaction */
 558         session_detach_modules(TheSession);
 559
 560         TheSession->Hdr = NULL;
 561         pthread_mutex_unlock(&TheSession->SessionMutex);        /* unbind */
 562 /* TODO
 563
 564         FreeStrBuf(&c_username);
 565         FreeStrBuf(&c_password);
 566         FreeStrBuf(&c_roomname);
 567         FreeStrBuf(&c_httpauth_user);
 568         FreeStrBuf(&c_httpauth_pass);
 569 */
 570         /* Free the request buffer */
 571         ///DeleteHash(&HTTPHeaders);
 572         ///FreeStrBuf(&ReqLine);
 573
 574         /* How long did this transaction take? */
 575         gettimeofday(&tx_finish, NULL);
 576
 577         lprintf(9, "Transaction completed in %ld.%06ld seconds.\n",
 578                 ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) / 1000000,
 579                 ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) % 1000000
 580         );
 581 }
 582
 583 void tmplput_nonce(StrBuf *Target, WCTemplputParams *TP)
 584 {
 585         wcsession *WCC = WC;
 586         StrBufAppendPrintf(Target, "%ld",
 587                            (WCC != NULL)? WCC->nonce:0);
 588 }
 589
 590 void tmplput_current_user(StrBuf *Target, WCTemplputParams *TP)
 591 {
 592         StrBufAppendTemplate(Target, TP, WC->wc_fullname, 0);
 593 }
 594
 595 void tmplput_current_room(StrBuf *Target, WCTemplputParams *TP)
 596 {
 597         StrBufAppendTemplate(Target, TP, WC->wc_roomname, 0);
 598 }
 599
 600
 601 void Header_HandleCookie(StrBuf *Line, ParsedHttpHdrs *hdr)
 602 {
 603         hdr->RawCookie = Line;
 604         if (hdr->DontNeedAuth)
 605                 return;
 606 /*
 607         c_username = NewStrBuf();
 608         c_password = NewStrBuf();
 609         c_roomname = NewStrBuf();
 610         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
 611         c_httpauth_user = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_USER));
 612         c_httpauth_pass = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_PASS));
 613 */
 614         cookie_to_stuff(Line, &hdr->desired_session,
 615                         hdr->c_username,
 616                         hdr->c_password,
 617                         hdr->c_roomname);
 618         hdr->got_cookie = 1;
 619 }
 620
 621
 622         /*
 623          * Browser-based sessions use cookies for session authentication
 624          * /
 625         if (!isbogus &&
 626             GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
 627             (vLine != NULL)) {
 628                 cookie_to_stuff(vLine, &desired_session,
 629                                 NULL, NULL, NULL);
 630                 got_cookie = 1;
 631         }
 632         */
 633         /*
 634          * GroupDAV-based sessions use HTTP authentication
 635          */
 636 /*
 637         if (!isbogus &&
 638             GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
 639             (vLine != NULL)) {
 640                 Line = (StrBuf*)vLine;
 641                 if (strncasecmp(ChrPtr(Line), "Basic", 5) == 0) {
 642                         StrBufCutLeft(Line, 6);
 643                         CtdlDecodeBase64(httpauth_string, ChrPtr(Line), StrLength(Line));
 644                         extract_token(httpauth_user, httpauth_string, 0, ':', sizeof httpauth_user);
 645                         extract_token(httpauth_pass, httpauth_string, 1, ':', sizeof httpauth_pass);
 646                 }
 647                 else
 648                         lprintf(1, "Authentication scheme not supported! [%s]\n", ChrPtr(Line));
 649         }
 650
 651 */
 652 void Header_HandleAuth(StrBuf *Line, ParsedHttpHdrs *hdr)
 653 {
 654         const char *Pos = NULL;
 655         StrBufDecodeBase64(Line);
 656         StrBufExtract_NextToken(hdr->c_username, Line, &Pos, ':');
 657         StrBufExtract_NextToken(hdr->c_password, Line, &Pos, ':');
 658 }
 659
 660 void Header_HandleContentLength(StrBuf *Line, ParsedHttpHdrs *hdr)
 661 {
 662         hdr->ContentLength = StrToi(Line);
 663 }
 664
 665 void Header_HandleContentType(StrBuf *Line, ParsedHttpHdrs *hdr)
 666 {
 667         hdr->ContentType = Line;
 668 }
 669
 670 void Header_HandleUserAgent(StrBuf *Line, ParsedHttpHdrs *hdr)
 671 {
 672         hdr->user_agent = Line;
 673 #ifdef TECH_PREVIEW
 674 /* TODO: do this later on session creating
 675         if ((WCC->is_mobile < 0) && is_mobile_ua(&buf[12])) {
 676                 WCC->is_mobile = 1;
 677         }
 678         else {
 679                 WCC->is_mobile = 0;
 680         }
 681 */
 682 #endif
 683 }
 684
 685
 686 void Header_HandleHost(StrBuf *Line, ParsedHttpHdrs *hdr)
 687 {
 688         if ((follow_xff) && (hdr->http_host != NULL))
 689                 return;
 690         else
 691                 hdr->http_host = Line;
 692 }
 693
 694 void Header_HandleXFFHost(StrBuf *Line, ParsedHttpHdrs *hdr)
 695 {
 696         if (follow_xff)
 697                 hdr->http_host = Line;
 698 }
 699
 700
 701 void Header_HandleXFF(StrBuf *Line, ParsedHttpHdrs *hdr)
 702 {
 703         hdr->browser_host = Line;
 704
 705         while (StrBufNum_tokens(hdr->browser_host, ',') > 1) {
 706                 StrBufRemove_token(hdr->browser_host, 0, ',');
 707         }
 708         StrBufTrim(hdr->browser_host);
 709 }
 710
 711 void Header_HandleIfModSince(StrBuf *Line, ParsedHttpHdrs *hdr)
 712 {
 713         hdr->if_modified_since = httpdate_to_timestamp(Line);
 714 }
 715
 716 void Header_HandleAcceptEncoding(StrBuf *Line, ParsedHttpHdrs *hdr)
 717 {
 718         /*
 719          * Can we compress?
 720          */
 721         if (strstr(&ChrPtr(Line)[16], "gzip")) {
 722                 hdr->gzip_ok = 1;
 723         }
 724 }
 725
 726 /*
 727 {
 728         c_username = NewStrBuf();
 729         c_password = NewStrBuf();
 730         c_roomname = NewStrBuf();
 731         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
 732         c_httpauth_user = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_USER));
 733         c_httpauth_pass = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_PASS));
 734 }
 735 */
 736         /* *
 737          * These are the URL's which may be executed without a
 738          * session cookie already set.  If it's not one of these,
 739          * force the session to close because cookies are
 740          * probably disabled on the client browser.
 741          * /
 742         else if ( (StrLength(ReqLine) > 1 )
 743                 && (strncasecmp(ChrPtr(ReqLine), "/404", 4))
 744                 && (Hdr.got_cookie == 0)) {
 745                 StrBufPlain(ReqLine,
 746                             HKEY("/static/nocookies.html"
 747                                  "?force_close_session=yes"));
 748         }
 749 */
 750 const char *ReqStrs[eNONE] = {
 751         "GET",
 752         "POST",
 753         "OPTIONS",
 754         "PROPFIND",
 755         "PUT",
 756         "DELETE",
 757         "HEAD",
 758         "MOVE",
 759         "COPY"
 760 };
 761
 762 void
 763 ServerStartModule_CONTEXT
 764 (void)
 765 {
 766         long *v;
 767         HttpReqTypes = NewHash(1, NULL);
 768         HttpHeaderHandler = NewHash(1, NULL);
 769
 770         v = malloc(sizeof(long));
 771         *v = eGET;
 772         Put(HttpReqTypes, HKEY("GET"), v, NULL);
 773
 774         v = malloc(sizeof(long));
 775         *v = ePOST;
 776         Put(HttpReqTypes, HKEY("POST"), v, NULL);
 777
 778         v = malloc(sizeof(long));
 779         *v = eOPTIONS;
 780         Put(HttpReqTypes, HKEY("OPTIONS"), v, NULL);
 781
 782         v = malloc(sizeof(long));
 783         *v = ePROPFIND;
 784         Put(HttpReqTypes, HKEY("PROPFIND"), v, NULL);
 785
 786         v = malloc(sizeof(long));
 787         *v = ePUT;
 788         Put(HttpReqTypes, HKEY("PUT"), v, NULL);
 789
 790         v = malloc(sizeof(long));
 791         *v = eDELETE;
 792         Put(HttpReqTypes, HKEY("DELETE"), v, NULL);
 793
 794         v = malloc(sizeof(long));
 795         *v = eHEAD;
 796         Put(HttpReqTypes, HKEY("HEAD"), v, NULL);
 797
 798         v = malloc(sizeof(long));
 799         *v = eMOVE;
 800         Put(HttpReqTypes, HKEY("MOVE"), v, NULL);
 801
 802         v = malloc(sizeof(long));
 803         *v = eCOPY;
 804         Put(HttpReqTypes, HKEY("COPY"), v, NULL);
 805 }
 806
 807 void
 808 ServerShutdownModule_CONTEXT
 809 (void)
 810 {
 811         DeleteHash(&HttpReqTypes);
 812         DeleteHash(&HttpHeaderHandler);
 813 }
 814
 815 void RegisterHeaderHandler(const char *Name, long Len, Header_Evaluator F)
 816 {
 817         OneHttpHeader *pHdr;
 818         pHdr = (OneHttpHeader*) malloc(sizeof(OneHttpHeader));
 819         memset(pHdr, 0, sizeof(OneHttpHeader));
 820         pHdr->H = F;
 821         Put(HttpHeaderHandler, Name, Len, pHdr, DestroyHttpHeaderHandler);
 822 }
 823 extern void blank_page(void); ///TODO: remove me
 824 void
 825 InitModule_CONTEXT
 826 (void)
 827 {
 828         RegisterHeaderHandler(HKEY("COOKIE"), Header_HandleCookie);
 829         RegisterHeaderHandler(HKEY("AUTHORIZATION"), Header_HandleAuth);
 830         RegisterHeaderHandler(HKEY("CONTENT-LENGTH"), Header_HandleContentLength);
 831         RegisterHeaderHandler(HKEY("CONTENT-TYPE"), Header_HandleContentType);
 832         RegisterHeaderHandler(HKEY("USER-AGENT"), Header_HandleUserAgent);
 833         RegisterHeaderHandler(HKEY("X-FORWARDED-HOST"), Header_HandleXFFHost);
 834         RegisterHeaderHandler(HKEY("HOST"), Header_HandleHost);
 835         RegisterHeaderHandler(HKEY("X-FORWARDED-FOR"), Header_HandleXFF);
 836         RegisterHeaderHandler(HKEY("ACCEPT-ENCODING"), Header_HandleAcceptEncoding);
 837         RegisterHeaderHandler(HKEY("IF-MODIFIED-SINCE"), Header_HandleIfModSince);
 838
 839         RegisterNamespace("CURRENT_USER", 0, 1, tmplput_current_user, CTX_NONE);
 840         RegisterNamespace("CURRENT_ROOM", 0, 1, tmplput_current_room, CTX_NONE);
 841         RegisterNamespace("NONCE", 0, 0, tmplput_nonce, 0);
 842
 843
 844
 845         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS|BOGUS);
 846
 847         WebcitAddUrlHandler(HKEY("blank"), blank_page, URLNAMESPACE);
 848 }
 849 //FreeStrBuf(&WCC->this_page);
 850