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);
 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 ///HttpHeaderHandler
 446
 447
 448
 449
 450
 451         /*
 452          * If the request is prefixed by "/webcit" then chop that off.  This
 453          * allows a front end web server to forward all /webcit requests to us
 454          * while still using the same web server port for other things.
 455          * /
 456         if (!isbogus &&
 457             (StrLength(ReqLine) >= 8) &&
 458             (strstr(ChrPtr(ReqLine), "/webcit/")) ) {
 459                 StrBufCutLeft(ReqLine, 7);
 460         }
 461
 462         /* Begin parsing the request. * /
 463 #ifdef TECH_PREVIEW
 464         if ((strncmp(ChrPtr(ReqLine), "/sslg", 5) != 0) &&
 465             (strncmp(ChrPtr(ReqLine), "/static/", 8) != 0) &&
 466             (strncmp(ChrPtr(ReqLine), "/tiny_mce/", 10) != 0) &&
 467             (strncmp(ChrPtr(ReqLine), "/wholist_section", 16) != 0) &&
 468             (strstr(ChrPtr(ReqLine), "wholist_section") == NULL)) {
 469 #endif
 470                 lprintf(5, "HTTP: %s %s\n", ReqStrs[Hdr.eReqType], ChrPtr(ReqLine));
 471 #ifdef TECH_PREVIEW
 472         }
 473 #endif
 474
 475 */
 476
 477         /**
 478          * See if there's an existing session open with the desired ID or user/pass
 479          */
 480         TheSession = NULL;
 481
 482         if (TheSession == NULL) {
 483                 pthread_mutex_lock(&SessionListMutex);
 484                 for (sptr = SessionList;
 485                      ((sptr != NULL) && (TheSession == NULL));
 486                       sptr = sptr->next) {
 487
 488                         /** If HTTP-AUTH, look for a session with matching credentials * /
 489                         if ( (////TODO check auth type here...
 490                              &&(!strcasecmp(ChrPtr(sptr->httpauth_user), httpauth_user))
 491                              &&(!strcasecmp(ChrPtr(sptr->httpauth_pass), httpauth_pass)) ) {
 492                                 TheSession = sptr;
 493                         }
 494
 495                         /** If cookie-session, look for a session with matching session ID */
 496                         if ( (Hdr.desired_session != 0) && (sptr->wc_session == Hdr.desired_session)) {
 497                                 TheSession = sptr;
 498                         }
 499
 500                 }
 501                 pthread_mutex_unlock(&SessionListMutex);
 502         }
 503
 504         /**
 505          * Create a new session if we have to
 506          */
 507         if (TheSession == NULL) {
 508                 lprintf(3, "Creating a new session\n");
 509                 TheSession = (wcsession *)
 510                         malloc(sizeof(wcsession));
 511                 memset(TheSession, 0, sizeof(wcsession));
 512                 TheSession->Hdr = &Hdr;
 513                 TheSession->serv_sock = (-1);
 514                 TheSession->chat_sock = (-1);
 515
 516                 /* If we're recreating a session that expired, it's best to give it the same
 517                  * session number that it had before.  The client browser ought to pick up
 518                  * the new session number and start using it, but in some rare situations it
 519                  * doesn't, and that's a Bad Thing because it causes lots of spurious sessions
 520                  * to get created.
 521                  */
 522                 if (Hdr.desired_session == 0) {
 523                         TheSession->wc_session = GenerateSessionID();
 524                 }
 525                 else {
 526                         TheSession->wc_session = Hdr.desired_session;
 527                 }
 528 /*
 529                 TheSession->httpauth_user = NewStrBufPlain(httpauth_user, -1);
 530                         TheSession->httpauth_pass = NewStrBufPlain(httpauth_user, -1);
 531 */
 532                 pthread_setspecific(MyConKey, (void *)TheSession);
 533                 session_new_modules(TheSession);
 534
 535                 pthread_mutex_init(&TheSession->SessionMutex, NULL);
 536                 pthread_mutex_lock(&SessionListMutex);
 537                 TheSession->nonce = rand();
 538                 TheSession->next = SessionList;
 539                 TheSession->is_mobile = -1;
 540                 SessionList = TheSession;
 541                 pthread_mutex_unlock(&SessionListMutex);
 542         }
 543
 544         /*
 545          * A future improvement might be to check the session integrity
 546          * at this point before continuing.
 547          */
 548
 549         /*
 550          * Bind to the session and perform the transaction
 551          */
 552         pthread_mutex_lock(&TheSession->SessionMutex);          /* bind */
 553         pthread_setspecific(MyConKey, (void *)TheSession);
 554
 555         TheSession->lastreq = time(NULL);                       /* log */
 556         TheSession->Hdr = &Hdr;
 557
 558         session_attach_modules(TheSession);
 559         session_loop();                         /* do transaction */
 560
 561
 562         /* How long did this transaction take? */
 563         gettimeofday(&tx_finish, NULL);
 564
 565         lprintf(9, "Transaction [%s] completed in %ld.%06ld seconds.\n",
 566                 ChrPtr(Hdr.this_page),
 567                 ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) / 1000000,
 568                 ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) % 1000000
 569         );
 570
 571         session_detach_modules(TheSession);
 572
 573         TheSession->Hdr = NULL;
 574         pthread_mutex_unlock(&TheSession->SessionMutex);        /* unbind */
 575
 576
 577         http_destroy_modules(&Hdr);
 578 /* TODO
 579
 580         FreeStrBuf(&c_username);
 581         FreeStrBuf(&c_password);
 582         FreeStrBuf(&c_roomname);
 583         FreeStrBuf(&c_httpauth_user);
 584         FreeStrBuf(&c_httpauth_pass);
 585 */
 586         /* Free the request buffer */
 587         ///FreeStrBuf(&ReqLine);
 588
 589 }
 590
 591 void tmplput_nonce(StrBuf *Target, WCTemplputParams *TP)
 592 {
 593         wcsession *WCC = WC;
 594         StrBufAppendPrintf(Target, "%ld",
 595                            (WCC != NULL)? WCC->nonce:0);
 596 }
 597
 598 void tmplput_current_user(StrBuf *Target, WCTemplputParams *TP)
 599 {
 600         StrBufAppendTemplate(Target, TP, WC->wc_fullname, 0);
 601 }
 602
 603 void tmplput_current_room(StrBuf *Target, WCTemplputParams *TP)
 604 {
 605         StrBufAppendTemplate(Target, TP, WC->wc_roomname, 0);
 606 }
 607
 608
 609 void Header_HandleCookie(StrBuf *Line, ParsedHttpHdrs *hdr)
 610 {
 611         hdr->RawCookie = Line;
 612         if (hdr->DontNeedAuth)
 613                 return;
 614 /*
 615         c_username = NewStrBuf();
 616         c_password = NewStrBuf();
 617         c_roomname = NewStrBuf();
 618         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
 619         c_httpauth_user = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_USER));
 620         c_httpauth_pass = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_PASS));
 621 */
 622         cookie_to_stuff(Line, &hdr->desired_session,
 623                         hdr->c_username,
 624                         hdr->c_password,
 625                         hdr->c_roomname);
 626         hdr->got_cookie = 1;
 627 }
 628
 629
 630         /*
 631          * Browser-based sessions use cookies for session authentication
 632          * /
 633         if (!isbogus &&
 634             GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
 635             (vLine != NULL)) {
 636                 cookie_to_stuff(vLine, &desired_session,
 637                                 NULL, NULL, NULL);
 638                 got_cookie = 1;
 639         }
 640         */
 641         /*
 642          * GroupDAV-based sessions use HTTP authentication
 643          */
 644 /*
 645         if (!isbogus &&
 646             GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
 647             (vLine != NULL)) {
 648                 Line = (StrBuf*)vLine;
 649                 if (strncasecmp(ChrPtr(Line), "Basic", 5) == 0) {
 650                         StrBufCutLeft(Line, 6);
 651                         CtdlDecodeBase64(httpauth_string, ChrPtr(Line), StrLength(Line));
 652                         extract_token(httpauth_user, httpauth_string, 0, ':', sizeof httpauth_user);
 653                         extract_token(httpauth_pass, httpauth_string, 1, ':', sizeof httpauth_pass);
 654                 }
 655                 else
 656                         lprintf(1, "Authentication scheme not supported! [%s]\n", ChrPtr(Line));
 657         }
 658
 659 */
 660 void Header_HandleAuth(StrBuf *Line, ParsedHttpHdrs *hdr)
 661 {
 662         const char *Pos = NULL;
 663         StrBufDecodeBase64(Line);
 664         StrBufExtract_NextToken(hdr->c_username, Line, &Pos, ':');
 665         StrBufExtract_NextToken(hdr->c_password, Line, &Pos, ':');
 666 }
 667
 668 void Header_HandleContentLength(StrBuf *Line, ParsedHttpHdrs *hdr)
 669 {
 670         hdr->ContentLength = StrToi(Line);
 671 }
 672
 673 void Header_HandleContentType(StrBuf *Line, ParsedHttpHdrs *hdr)
 674 {
 675         hdr->ContentType = Line;
 676 }
 677
 678 void Header_HandleUserAgent(StrBuf *Line, ParsedHttpHdrs *hdr)
 679 {
 680         hdr->user_agent = Line;
 681 #ifdef TECH_PREVIEW
 682 /* TODO: do this later on session creating
 683         if ((WCC->is_mobile < 0) && is_mobile_ua(&buf[12])) {
 684                 WCC->is_mobile = 1;
 685         }
 686         else {
 687                 WCC->is_mobile = 0;
 688         }
 689 */
 690 #endif
 691 }
 692
 693
 694 void Header_HandleHost(StrBuf *Line, ParsedHttpHdrs *hdr)
 695 {
 696         if ((follow_xff) && (hdr->http_host != NULL))
 697                 return;
 698         else
 699                 hdr->http_host = Line;
 700 }
 701
 702 void Header_HandleXFFHost(StrBuf *Line, ParsedHttpHdrs *hdr)
 703 {
 704         if (follow_xff)
 705                 hdr->http_host = Line;
 706 }
 707
 708
 709 void Header_HandleXFF(StrBuf *Line, ParsedHttpHdrs *hdr)
 710 {
 711         hdr->browser_host = Line;
 712
 713         while (StrBufNum_tokens(hdr->browser_host, ',') > 1) {
 714                 StrBufRemove_token(hdr->browser_host, 0, ',');
 715         }
 716         StrBufTrim(hdr->browser_host);
 717 }
 718
 719 void Header_HandleIfModSince(StrBuf *Line, ParsedHttpHdrs *hdr)
 720 {
 721         hdr->if_modified_since = httpdate_to_timestamp(Line);
 722 }
 723
 724 void Header_HandleAcceptEncoding(StrBuf *Line, ParsedHttpHdrs *hdr)
 725 {
 726         /*
 727          * Can we compress?
 728          */
 729         if (strstr(&ChrPtr(Line)[16], "gzip")) {
 730                 hdr->gzip_ok = 1;
 731         }
 732 }
 733
 734 /*
 735 {
 736         c_username = NewStrBuf();
 737         c_password = NewStrBuf();
 738         c_roomname = NewStrBuf();
 739         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
 740         c_httpauth_user = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_USER));
 741         c_httpauth_pass = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_PASS));
 742 }
 743 */
 744         /* *
 745          * These are the URL's which may be executed without a
 746          * session cookie already set.  If it's not one of these,
 747          * force the session to close because cookies are
 748          * probably disabled on the client browser.
 749          * /
 750         else if ( (StrLength(ReqLine) > 1 )
 751                 && (strncasecmp(ChrPtr(ReqLine), "/404", 4))
 752                 && (Hdr.got_cookie == 0)) {
 753                 StrBufPlain(ReqLine,
 754                             HKEY("/static/nocookies.html"
 755                                  "?force_close_session=yes"));
 756         }
 757 */
 758 const char *ReqStrs[eNONE] = {
 759         "GET",
 760         "POST",
 761         "OPTIONS",
 762         "PROPFIND",
 763         "PUT",
 764         "DELETE",
 765         "HEAD",
 766         "MOVE",
 767         "COPY"
 768 };
 769
 770 void
 771 ServerStartModule_CONTEXT
 772 (void)
 773 {
 774         long *v;
 775         HttpReqTypes = NewHash(1, NULL);
 776         HttpHeaderHandler = NewHash(1, NULL);
 777
 778         v = malloc(sizeof(long));
 779         *v = eGET;
 780         Put(HttpReqTypes, HKEY("GET"), v, NULL);
 781
 782         v = malloc(sizeof(long));
 783         *v = ePOST;
 784         Put(HttpReqTypes, HKEY("POST"), v, NULL);
 785
 786         v = malloc(sizeof(long));
 787         *v = eOPTIONS;
 788         Put(HttpReqTypes, HKEY("OPTIONS"), v, NULL);
 789
 790         v = malloc(sizeof(long));
 791         *v = ePROPFIND;
 792         Put(HttpReqTypes, HKEY("PROPFIND"), v, NULL);
 793
 794         v = malloc(sizeof(long));
 795         *v = ePUT;
 796         Put(HttpReqTypes, HKEY("PUT"), v, NULL);
 797
 798         v = malloc(sizeof(long));
 799         *v = eDELETE;
 800         Put(HttpReqTypes, HKEY("DELETE"), v, NULL);
 801
 802         v = malloc(sizeof(long));
 803         *v = eHEAD;
 804         Put(HttpReqTypes, HKEY("HEAD"), v, NULL);
 805
 806         v = malloc(sizeof(long));
 807         *v = eMOVE;
 808         Put(HttpReqTypes, HKEY("MOVE"), v, NULL);
 809
 810         v = malloc(sizeof(long));
 811         *v = eCOPY;
 812         Put(HttpReqTypes, HKEY("COPY"), v, NULL);
 813 }
 814
 815 void
 816 ServerShutdownModule_CONTEXT
 817 (void)
 818 {
 819         DeleteHash(&HttpReqTypes);
 820         DeleteHash(&HttpHeaderHandler);
 821 }
 822
 823 void RegisterHeaderHandler(const char *Name, long Len, Header_Evaluator F)
 824 {
 825         OneHttpHeader *pHdr;
 826         pHdr = (OneHttpHeader*) malloc(sizeof(OneHttpHeader));
 827         memset(pHdr, 0, sizeof(OneHttpHeader));
 828         pHdr->H = F;
 829         Put(HttpHeaderHandler, Name, Len, pHdr, DestroyHttpHeaderHandler);
 830 }
 831 extern void blank_page(void); ///TODO: remove me
 832 void
 833 InitModule_CONTEXT
 834 (void)
 835 {
 836         RegisterHeaderHandler(HKEY("COOKIE"), Header_HandleCookie);
 837         RegisterHeaderHandler(HKEY("AUTHORIZATION"), Header_HandleAuth);
 838         RegisterHeaderHandler(HKEY("CONTENT-LENGTH"), Header_HandleContentLength);
 839         RegisterHeaderHandler(HKEY("CONTENT-TYPE"), Header_HandleContentType);
 840         RegisterHeaderHandler(HKEY("USER-AGENT"), Header_HandleUserAgent);
 841         RegisterHeaderHandler(HKEY("X-FORWARDED-HOST"), Header_HandleXFFHost);
 842         RegisterHeaderHandler(HKEY("HOST"), Header_HandleHost);
 843         RegisterHeaderHandler(HKEY("X-FORWARDED-FOR"), Header_HandleXFF);
 844         RegisterHeaderHandler(HKEY("ACCEPT-ENCODING"), Header_HandleAcceptEncoding);
 845         RegisterHeaderHandler(HKEY("IF-MODIFIED-SINCE"), Header_HandleIfModSince);
 846
 847         RegisterNamespace("CURRENT_USER", 0, 1, tmplput_current_user, CTX_NONE);
 848         RegisterNamespace("CURRENT_ROOM", 0, 1, tmplput_current_room, CTX_NONE);
 849         RegisterNamespace("NONCE", 0, 0, tmplput_nonce, 0);
 850
 851
 852
 853         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS|BOGUS);
 854
 855         WebcitAddUrlHandler(HKEY("webcit"), blank_page, URLNAMESPACE);
 856 }
 857
 858
 859
 860 void
 861 HttpDestroyModule_CONTEXT
 862 (ParsedHttpHdrs *httpreq)
 863 {
 864         FreeStrBuf(&httpreq->ReqLine);
 865         FreeStrBuf(&httpreq->ReadBuf);
 866         FreeStrBuf(&httpreq->PlainArgs);
 867         FreeStrBuf(&httpreq->this_page);
 868         DeleteHash(&httpreq->HTTPHeaders);
 869
 870 }