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                 /* are we about to ignore some prefix like webcit/ ? */
 287                 if ((Hdr->Handler->Flags & URLNAMESPACE) == 0)
 288                         break;
 289         } while (1);
 290         /* remove the handlername from the URL */
 291         if (Pos != NULL) {
 292                 StrBufCutLeft(Hdr->ReqLine,
 293                               Pos - ChrPtr(Hdr->ReqLine));
 294         }
 295 /*
 296         if (Hdr->Handler == NULL)
 297                 return 1;
 298 */
 299         Hdr->HTTPHeaders = NewHash(1, NULL);
 300
 301         return 0;
 302 }
 303
 304 int AnalyseHeaders(ParsedHttpHdrs *Hdr)
 305 {
 306         OneHttpHeader *pHdr;
 307         void *vHdr;
 308         long HKLen;
 309         const char *HashKey;
 310         HashPos *at = GetNewHashPos(Hdr->HTTPHeaders, 0);
 311
 312         while (GetNextHashPos(Hdr->HTTPHeaders, at, &HKLen, &HashKey, &vHdr) &&
 313                (vHdr != NULL)) {
 314                 pHdr = (OneHttpHeader *)vHdr;
 315                 if (pHdr->HaveEvaluator)
 316                         pHdr->H(pHdr->Val, Hdr);
 317
 318         }
 319         DeleteHashPos(&at);
 320         return 0;
 321 }
 322
 323 /*const char *nix(void *vptr) {return ChrPtr( (StrBuf*)vptr);}*/
 324
 325 /*
 326  * Read in the request
 327  */
 328 int ReadHTTPRequset (ParsedHttpHdrs *Hdr)
 329 {
 330         const char *pch, *pchs, *pche;
 331         OneHttpHeader *pHdr;
 332         StrBuf *Line, *LastLine, *HeaderName;
 333         int nLine = 0;
 334         void *vF;
 335         int isbogus = 0;
 336
 337         HeaderName = NewStrBuf();
 338         Hdr->ReadBuf = NewStrBuf();
 339         LastLine = NULL;
 340         do {
 341                 nLine ++;
 342                 Line = NewStrBuf();
 343
 344                 if (ClientGetLine(&Hdr->http_sock, Line, Hdr->ReadBuf, &Hdr->Pos) < 0) return 1;
 345
 346                 if (StrLength(Line) == 0) {
 347                         FreeStrBuf(&Line);
 348                         continue;
 349                 }
 350                 if (nLine == 1) {
 351                         isbogus = ReadHttpSubject(Hdr, Line, HeaderName);
 352                         if (isbogus) break;
 353                         continue;
 354                 }
 355
 356                 /* Do we need to Unfold? */
 357                 if ((LastLine != NULL) &&
 358                     (isspace(*ChrPtr(Line)))) {
 359                         pch = pchs = ChrPtr(Line);
 360                         pche = pchs + StrLength(Line);
 361                         while (isspace(*pch) && (pch < pche))
 362                                 pch ++;
 363                         StrBufCutLeft(Line, pch - pchs);
 364                         StrBufAppendBuf(LastLine, Line, 0);
 365
 366                         FreeStrBuf(&Line);
 367                         continue;
 368                 }
 369
 370                 StrBufSanitizeAscii(Line, '§');
 371                 StrBufExtract_token(HeaderName, Line, 0, ':');
 372
 373                 pchs = ChrPtr(Line);
 374                 pch = pchs + StrLength(HeaderName) + 1;
 375                 pche = pchs + StrLength(Line);
 376                 while (isspace(*pch) && (pch < pche))
 377                         pch ++;
 378                 StrBufCutLeft(Line, pch - pchs);
 379
 380                 StrBufUpCase(HeaderName);
 381
 382                 pHdr = (OneHttpHeader*) malloc(sizeof(OneHttpHeader));
 383                 memset(pHdr, 0, sizeof(OneHttpHeader));
 384                 pHdr->Val = Line;
 385
 386                 if (GetHash(HttpHeaderHandler, SKEY(HeaderName), &vF) &&
 387                     (vF != NULL))
 388                 {
 389                         OneHttpHeader *FHdr = (OneHttpHeader*) vF;
 390                         pHdr->H = FHdr->H;
 391                         pHdr->HaveEvaluator = 1;
 392                 }
 393                 Put(Hdr->HTTPHeaders, SKEY(HeaderName), pHdr, DestroyHttpHeaderHandler);
 394                 LastLine = Line;
 395         } while (Line != NULL);
 396
 397         FreeStrBuf(&HeaderName);
 398
 399         return isbogus;
 400 }
 401
 402
 403
 404 /*
 405  * handle one request
 406  *
 407  * This loop gets called once for every HTTP connection made to WebCit.  At
 408  * this entry point we have an HTTP socket with a browser allegedly on the
 409  * other end, but we have not yet bound to a WebCit session.
 410  *
 411  * The job of this function is to locate the correct session and bind to it,
 412  * or create a session if necessary and bind to it, then run the WebCit
 413  * transaction loop.  Afterwards, we unbind from the session.  When this
 414  * function returns, the worker thread is then free to handle another
 415  * transaction.
 416  */
 417 void context_loop(int *sock)
 418 {
 419         ParsedHttpHdrs Hdr;
 420         int isbogus = 0;
 421         wcsession *TheSession, *sptr;
 422         struct timeval tx_start;
 423         struct timeval tx_finish;
 424
 425         gettimeofday(&tx_start, NULL);          /* start a stopwatch for performance timing */
 426
 427         memset(&Hdr, 0, sizeof(ParsedHttpHdrs));
 428         Hdr.eReqType = eGET;
 429         Hdr.http_sock = *sock;
 430         /*
 431          * Find out what it is that the web browser is asking for
 432          */
 433         isbogus = ReadHTTPRequset(&Hdr);
 434
 435         if (!isbogus)
 436                 isbogus = AnalyseHeaders(&Hdr);
 437 /*
 438         if (isbogus)
 439                 StrBufPlain(ReqLine, HKEY("/404"));
 440 */
 441
 442 /*      dbg_PrintHash(HTTPHeaders, nix, NULL);  */
 443
 444         /*
 445          * If the request is prefixed by "/webcit" then chop that off.  This
 446          * allows a front end web server to forward all /webcit requests to us
 447          * while still using the same web server port for other things.
 448          * /
 449         if (!isbogus &&
 450             (StrLength(ReqLine) >= 8) &&
 451             (strstr(ChrPtr(ReqLine), "/webcit/")) ) {
 452                 StrBufCutLeft(ReqLine, 7);
 453         }
 454
 455         /* Begin parsing the request. * /
 456 #ifdef TECH_PREVIEW
 457         if ((strncmp(ChrPtr(ReqLine), "/sslg", 5) != 0) &&
 458             (strncmp(ChrPtr(ReqLine), "/static/", 8) != 0) &&
 459             (strncmp(ChrPtr(ReqLine), "/tiny_mce/", 10) != 0) &&
 460             (strncmp(ChrPtr(ReqLine), "/wholist_section", 16) != 0) &&
 461             (strstr(ChrPtr(ReqLine), "wholist_section") == NULL)) {
 462 #endif
 463                 lprintf(5, "HTTP: %s %s\n", ReqStrs[Hdr.eReqType], ChrPtr(ReqLine));
 464 #ifdef TECH_PREVIEW
 465         }
 466 #endif
 467
 468 */
 469
 470         /**
 471          * See if there's an existing session open with the desired ID or user/pass
 472          */
 473         TheSession = NULL;
 474
 475         if (TheSession == NULL) {
 476                 pthread_mutex_lock(&SessionListMutex);
 477                 for (sptr = SessionList;
 478                      ((sptr != NULL) && (TheSession == NULL));
 479                       sptr = sptr->next) {
 480
 481                         /** If HTTP-AUTH, look for a session with matching credentials * /
 482                         if ( (////TODO check auth type here...
 483                              &&(!strcasecmp(ChrPtr(sptr->httpauth_user), httpauth_user))
 484                              &&(!strcasecmp(ChrPtr(sptr->httpauth_pass), httpauth_pass)) ) {
 485                                 TheSession = sptr;
 486                         }
 487
 488                         /** If cookie-session, look for a session with matching session ID */
 489                         if ( (Hdr.desired_session != 0) && (sptr->wc_session == Hdr.desired_session)) {
 490                                 TheSession = sptr;
 491                         }
 492
 493                 }
 494                 pthread_mutex_unlock(&SessionListMutex);
 495         }
 496
 497         /**
 498          * Create a new session if we have to
 499          */
 500         if (TheSession == NULL) {
 501                 lprintf(3, "Creating a new session\n");
 502                 TheSession = (wcsession *)
 503                         malloc(sizeof(wcsession));
 504                 memset(TheSession, 0, sizeof(wcsession));
 505                 TheSession->Hdr = &Hdr;
 506                 TheSession->serv_sock = (-1);
 507                 TheSession->chat_sock = (-1);
 508
 509                 /* If we're recreating a session that expired, it's best to give it the same
 510                  * session number that it had before.  The client browser ought to pick up
 511                  * the new session number and start using it, but in some rare situations it
 512                  * doesn't, and that's a Bad Thing because it causes lots of spurious sessions
 513                  * to get created.
 514                  */
 515                 if (Hdr.desired_session == 0) {
 516                         TheSession->wc_session = GenerateSessionID();
 517                 }
 518                 else {
 519                         TheSession->wc_session = Hdr.desired_session;
 520                 }
 521 /*
 522                 TheSession->httpauth_user = NewStrBufPlain(httpauth_user, -1);
 523                         TheSession->httpauth_pass = NewStrBufPlain(httpauth_user, -1);
 524 */
 525                 pthread_setspecific(MyConKey, (void *)TheSession);
 526                 session_new_modules(TheSession);
 527
 528                 pthread_mutex_init(&TheSession->SessionMutex, NULL);
 529                 pthread_mutex_lock(&SessionListMutex);
 530                 TheSession->nonce = rand();
 531                 TheSession->next = SessionList;
 532                 TheSession->is_mobile = -1;
 533                 SessionList = TheSession;
 534                 pthread_mutex_unlock(&SessionListMutex);
 535         }
 536
 537         /*
 538          * A future improvement might be to check the session integrity
 539          * at this point before continuing.
 540          */
 541
 542         /*
 543          * Bind to the session and perform the transaction
 544          */
 545         pthread_mutex_lock(&TheSession->SessionMutex);          /* bind */
 546         pthread_setspecific(MyConKey, (void *)TheSession);
 547
 548         TheSession->lastreq = time(NULL);                       /* log */
 549         TheSession->Hdr = &Hdr;
 550
 551         session_attach_modules(TheSession);
 552         session_loop();                         /* do transaction */
 553
 554
 555         /* How long did this transaction take? */
 556         gettimeofday(&tx_finish, NULL);
 557
 558         lprintf(9, "Transaction [%s] completed in %ld.%06ld seconds.\n",
 559                 ChrPtr(Hdr.this_page),
 560                 ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) / 1000000,
 561                 ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) % 1000000
 562         );
 563
 564         session_detach_modules(TheSession);
 565
 566         TheSession->Hdr = NULL;
 567         pthread_mutex_unlock(&TheSession->SessionMutex);        /* unbind */
 568
 569
 570         http_destroy_modules(&Hdr);
 571 /* TODO
 572
 573         FreeStrBuf(&c_username);
 574         FreeStrBuf(&c_password);
 575         FreeStrBuf(&c_roomname);
 576         FreeStrBuf(&c_httpauth_user);
 577         FreeStrBuf(&c_httpauth_pass);
 578 */
 579         /* Free the request buffer */
 580         ///FreeStrBuf(&ReqLine);
 581
 582 }
 583
 584 void tmplput_nonce(StrBuf *Target, WCTemplputParams *TP)
 585 {
 586         wcsession *WCC = WC;
 587         StrBufAppendPrintf(Target, "%ld",
 588                            (WCC != NULL)? WCC->nonce:0);
 589 }
 590
 591 void tmplput_current_user(StrBuf *Target, WCTemplputParams *TP)
 592 {
 593         StrBufAppendTemplate(Target, TP, WC->wc_fullname, 0);
 594 }
 595
 596 void tmplput_current_room(StrBuf *Target, WCTemplputParams *TP)
 597 {
 598         StrBufAppendTemplate(Target, TP, WC->wc_roomname, 0);
 599 }
 600
 601
 602 void Header_HandleCookie(StrBuf *Line, ParsedHttpHdrs *hdr)
 603 {
 604         hdr->RawCookie = Line;
 605         if (hdr->DontNeedAuth)
 606                 return;
 607 /*
 608         c_username = NewStrBuf();
 609         c_password = NewStrBuf();
 610         c_roomname = NewStrBuf();
 611         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
 612         c_httpauth_user = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_USER));
 613         c_httpauth_pass = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_PASS));
 614 */
 615         cookie_to_stuff(Line, &hdr->desired_session,
 616                         hdr->c_username,
 617                         hdr->c_password,
 618                         hdr->c_roomname);
 619         hdr->got_cookie = 1;
 620 }
 621
 622
 623         /*
 624          * Browser-based sessions use cookies for session authentication
 625          * /
 626         if (!isbogus &&
 627             GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
 628             (vLine != NULL)) {
 629                 cookie_to_stuff(vLine, &desired_session,
 630                                 NULL, NULL, NULL);
 631                 got_cookie = 1;
 632         }
 633         */
 634         /*
 635          * GroupDAV-based sessions use HTTP authentication
 636          */
 637 /*
 638         if (!isbogus &&
 639             GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
 640             (vLine != NULL)) {
 641                 Line = (StrBuf*)vLine;
 642                 if (strncasecmp(ChrPtr(Line), "Basic", 5) == 0) {
 643                         StrBufCutLeft(Line, 6);
 644                         CtdlDecodeBase64(httpauth_string, ChrPtr(Line), StrLength(Line));
 645                         extract_token(httpauth_user, httpauth_string, 0, ':', sizeof httpauth_user);
 646                         extract_token(httpauth_pass, httpauth_string, 1, ':', sizeof httpauth_pass);
 647                 }
 648                 else
 649                         lprintf(1, "Authentication scheme not supported! [%s]\n", ChrPtr(Line));
 650         }
 651
 652 */
 653 void Header_HandleAuth(StrBuf *Line, ParsedHttpHdrs *hdr)
 654 {
 655         const char *Pos = NULL;
 656         StrBufDecodeBase64(Line);
 657         StrBufExtract_NextToken(hdr->c_username, Line, &Pos, ':');
 658         StrBufExtract_NextToken(hdr->c_password, Line, &Pos, ':');
 659 }
 660
 661 void Header_HandleContentLength(StrBuf *Line, ParsedHttpHdrs *hdr)
 662 {
 663         hdr->ContentLength = StrToi(Line);
 664 }
 665
 666 void Header_HandleContentType(StrBuf *Line, ParsedHttpHdrs *hdr)
 667 {
 668         hdr->ContentType = Line;
 669 }
 670
 671 void Header_HandleUserAgent(StrBuf *Line, ParsedHttpHdrs *hdr)
 672 {
 673         hdr->user_agent = Line;
 674 #ifdef TECH_PREVIEW
 675 /* TODO: do this later on session creating
 676         if ((WCC->is_mobile < 0) && is_mobile_ua(&buf[12])) {
 677                 WCC->is_mobile = 1;
 678         }
 679         else {
 680                 WCC->is_mobile = 0;
 681         }
 682 */
 683 #endif
 684 }
 685
 686
 687 void Header_HandleHost(StrBuf *Line, ParsedHttpHdrs *hdr)
 688 {
 689         if ((follow_xff) && (hdr->http_host != NULL))
 690                 return;
 691         else
 692                 hdr->http_host = Line;
 693 }
 694
 695 void Header_HandleXFFHost(StrBuf *Line, ParsedHttpHdrs *hdr)
 696 {
 697         if (follow_xff)
 698                 hdr->http_host = Line;
 699 }
 700
 701
 702 void Header_HandleXFF(StrBuf *Line, ParsedHttpHdrs *hdr)
 703 {
 704         hdr->browser_host = Line;
 705
 706         while (StrBufNum_tokens(hdr->browser_host, ',') > 1) {
 707                 StrBufRemove_token(hdr->browser_host, 0, ',');
 708         }
 709         StrBufTrim(hdr->browser_host);
 710 }
 711
 712 void Header_HandleIfModSince(StrBuf *Line, ParsedHttpHdrs *hdr)
 713 {
 714         hdr->if_modified_since = httpdate_to_timestamp(Line);
 715 }
 716
 717 void Header_HandleAcceptEncoding(StrBuf *Line, ParsedHttpHdrs *hdr)
 718 {
 719         /*
 720          * Can we compress?
 721          */
 722         if (strstr(&ChrPtr(Line)[16], "gzip")) {
 723                 hdr->gzip_ok = 1;
 724         }
 725 }
 726
 727 /*
 728 {
 729         c_username = NewStrBuf();
 730         c_password = NewStrBuf();
 731         c_roomname = NewStrBuf();
 732         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
 733         c_httpauth_user = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_USER));
 734         c_httpauth_pass = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_PASS));
 735 }
 736 */
 737         /* *
 738          * These are the URL's which may be executed without a
 739          * session cookie already set.  If it's not one of these,
 740          * force the session to close because cookies are
 741          * probably disabled on the client browser.
 742          * /
 743         else if ( (StrLength(ReqLine) > 1 )
 744                 && (strncasecmp(ChrPtr(ReqLine), "/404", 4))
 745                 && (Hdr.got_cookie == 0)) {
 746                 StrBufPlain(ReqLine,
 747                             HKEY("/static/nocookies.html"
 748                                  "?force_close_session=yes"));
 749         }
 750 */
 751 const char *ReqStrs[eNONE] = {
 752         "GET",
 753         "POST",
 754         "OPTIONS",
 755         "PROPFIND",
 756         "PUT",
 757         "DELETE",
 758         "HEAD",
 759         "MOVE",
 760         "COPY"
 761 };
 762
 763 void
 764 ServerStartModule_CONTEXT
 765 (void)
 766 {
 767         long *v;
 768         HttpReqTypes = NewHash(1, NULL);
 769         HttpHeaderHandler = NewHash(1, NULL);
 770
 771         v = malloc(sizeof(long));
 772         *v = eGET;
 773         Put(HttpReqTypes, HKEY("GET"), v, NULL);
 774
 775         v = malloc(sizeof(long));
 776         *v = ePOST;
 777         Put(HttpReqTypes, HKEY("POST"), v, NULL);
 778
 779         v = malloc(sizeof(long));
 780         *v = eOPTIONS;
 781         Put(HttpReqTypes, HKEY("OPTIONS"), v, NULL);
 782
 783         v = malloc(sizeof(long));
 784         *v = ePROPFIND;
 785         Put(HttpReqTypes, HKEY("PROPFIND"), v, NULL);
 786
 787         v = malloc(sizeof(long));
 788         *v = ePUT;
 789         Put(HttpReqTypes, HKEY("PUT"), v, NULL);
 790
 791         v = malloc(sizeof(long));
 792         *v = eDELETE;
 793         Put(HttpReqTypes, HKEY("DELETE"), v, NULL);
 794
 795         v = malloc(sizeof(long));
 796         *v = eHEAD;
 797         Put(HttpReqTypes, HKEY("HEAD"), v, NULL);
 798
 799         v = malloc(sizeof(long));
 800         *v = eMOVE;
 801         Put(HttpReqTypes, HKEY("MOVE"), v, NULL);
 802
 803         v = malloc(sizeof(long));
 804         *v = eCOPY;
 805         Put(HttpReqTypes, HKEY("COPY"), v, NULL);
 806 }
 807
 808 void
 809 ServerShutdownModule_CONTEXT
 810 (void)
 811 {
 812         DeleteHash(&HttpReqTypes);
 813         DeleteHash(&HttpHeaderHandler);
 814 }
 815
 816 void RegisterHeaderHandler(const char *Name, long Len, Header_Evaluator F)
 817 {
 818         OneHttpHeader *pHdr;
 819         pHdr = (OneHttpHeader*) malloc(sizeof(OneHttpHeader));
 820         memset(pHdr, 0, sizeof(OneHttpHeader));
 821         pHdr->H = F;
 822         Put(HttpHeaderHandler, Name, Len, pHdr, DestroyHttpHeaderHandler);
 823 }
 824 extern void blank_page(void); ///TODO: remove me
 825 void
 826 InitModule_CONTEXT
 827 (void)
 828 {
 829         RegisterHeaderHandler(HKEY("COOKIE"), Header_HandleCookie);
 830         RegisterHeaderHandler(HKEY("AUTHORIZATION"), Header_HandleAuth);
 831         RegisterHeaderHandler(HKEY("CONTENT-LENGTH"), Header_HandleContentLength);
 832         RegisterHeaderHandler(HKEY("CONTENT-TYPE"), Header_HandleContentType);
 833         RegisterHeaderHandler(HKEY("USER-AGENT"), Header_HandleUserAgent);
 834         RegisterHeaderHandler(HKEY("X-FORWARDED-HOST"), Header_HandleXFFHost);
 835         RegisterHeaderHandler(HKEY("HOST"), Header_HandleHost);
 836         RegisterHeaderHandler(HKEY("X-FORWARDED-FOR"), Header_HandleXFF);
 837         RegisterHeaderHandler(HKEY("ACCEPT-ENCODING"), Header_HandleAcceptEncoding);
 838         RegisterHeaderHandler(HKEY("IF-MODIFIED-SINCE"), Header_HandleIfModSince);
 839
 840         RegisterNamespace("CURRENT_USER", 0, 1, tmplput_current_user, CTX_NONE);
 841         RegisterNamespace("CURRENT_ROOM", 0, 1, tmplput_current_room, CTX_NONE);
 842         RegisterNamespace("NONCE", 0, 0, tmplput_nonce, 0);
 843
 844
 845
 846         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS|BOGUS);
 847
 848         WebcitAddUrlHandler(HKEY("webcit"), blank_page, URLNAMESPACE);
 849 }
 850
 851
 852
 853 void
 854 HttpDestroyModule_CONTEXT
 855 (ParsedHttpHdrs *httpreq)
 856 {
 857         FreeStrBuf(&httpreq->ReqLine);
 858         FreeStrBuf(&httpreq->ReadBuf);
 859         FreeStrBuf(&httpreq->PlainArgs);
 860         FreeStrBuf(&httpreq->this_page);
 861         DeleteHash(&httpreq->HTTPHeaders);
 862
 863 }