webcit/webcit.c

   1 /*
   2  * $Id$
   3  *
   4  * This is the main transaction loop of the web service.  It maintains a
   5  * persistent session to the Citadel server, handling HTTP WebCit requests as
   6  * they arrive and presenting a user interface.
   7  */
   8 #define SHOW_ME_VAPPEND_PRINTF
   9 #include <stdio.h>
  10 #include <stdarg.h>
  11 #include "webcit.h"
  12 #include "groupdav.h"
  13 #include "webserver.h"
  14
  15
  16 /*
  17  * String to unset the cookie.
  18  * Any date "in the past" will work, so I chose my birthday, right down to
  19  * the exact minute.  :)
  20  */
  21 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  22 StrBuf *csslocal = NULL;
  23 HashList *HandlerHash = NULL;
  24
  25
  26 void DeleteWebcitHandler(void *vHandler)
  27 {
  28         WebcitHandler *Handler = (WebcitHandler*) vHandler;
  29         FreeStrBuf(&Handler->Name);
  30         free (Handler);
  31
  32 }
  33
  34 void WebcitAddUrlHandler(const char * UrlString, long UrlSLen,
  35                          const char *DisplayName, long dslen,
  36                          WebcitHandlerFunc F,
  37                          long Flags)
  38 {
  39         WebcitHandler *NewHandler;
  40         NewHandler = (WebcitHandler*) malloc(sizeof(WebcitHandler));
  41         NewHandler->F = F;
  42         NewHandler->Flags = Flags;
  43         NewHandler->Name = NewStrBufPlain(UrlString, UrlSLen);
  44         StrBufShrinkToFit(NewHandler->Name, 1);
  45         NewHandler->DisplayName = NewStrBufPlain(DisplayName, dslen);
  46         StrBufShrinkToFit(NewHandler->DisplayName, 1);
  47         Put(HandlerHash, UrlString, UrlSLen, NewHandler, DeleteWebcitHandler);
  48 }
  49
  50
  51 /*
  52  * web-printing funcion. uses our vsnprintf wrapper
  53  */
  54 void wc_printf(const char *format,...)
  55 {
  56         wcsession *WCC = WC;
  57         va_list arg_ptr;
  58
  59         if (WCC->WBuf == NULL)
  60                 WCC->WBuf = NewStrBuf();
  61
  62         va_start(arg_ptr, format);
  63         StrBufVAppendPrintf(WCC->WBuf, format, arg_ptr);
  64         va_end(arg_ptr);
  65 }
  66
  67 /*
  68  * http-header-printing funcion. uses our vsnprintf wrapper
  69  */
  70 void hprintf(const char *format,...)
  71 {
  72         wcsession *WCC = WC;
  73         va_list arg_ptr;
  74
  75         va_start(arg_ptr, format);
  76         StrBufVAppendPrintf(WCC->HBuf, format, arg_ptr);
  77         va_end(arg_ptr);
  78 }
  79
  80
  81
  82 /*
  83  * wrap up an HTTP session, closes tags, etc.
  84  *
  85  * print_standard_html_footer should be set to:
  86  * 0            - to transmit only,
  87  * nonzero      - to append the closing tags
  88  */
  89 void wDumpContent(int print_standard_html_footer)
  90 {
  91         if (print_standard_html_footer) {
  92                 wc_printf("</div> <!-- end of 'content' div -->\n");
  93                 do_template("trailing", NULL);
  94         }
  95
  96         /* If we've been saving it all up for one big output burst,
  97          * go ahead and do that now.
  98          */
  99         end_burst();
 100 }
 101
 102
 103
 104
 105 /*
 106  * Output HTTP headers and leading HTML for a page
 107  */
 108 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 109                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 110
 111                         int do_room_banner,     /* 0=no, 1=yes,
 112                                                  * 2 = I'm going to embed my own, so don't open the
 113                                                  *     <div id="content"> either.
 114                                                  */
 115
 116                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 117                         int suppress_check,     /* 1 = suppress check for instant messages          */
 118                         int cache               /* 1 = allow browser to cache this page             */
 119 ) {
 120         wcsession *WCC = WC;
 121         char cookie[1024];
 122         char httpnow[128];
 123
 124         hprintf("HTTP/1.1 200 OK\n");
 125         http_datestring(httpnow, sizeof httpnow, time(NULL));
 126
 127         if (do_httpheaders) {
 128                 if (WCC->serv_info != NULL)
 129                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 130                                 "Server: %s / %s\n"
 131                                 "Connection: close\r\n",
 132                                 PACKAGE_STRING,
 133                                 ChrPtr(WCC->serv_info->serv_software));
 134                 else
 135                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 136                                 "Server: %s / [n/a]\n"
 137                                 "Connection: close\r\n",
 138                                 PACKAGE_STRING);
 139         }
 140
 141         if (cache > 0) {
 142                 char httpTomorow[128];
 143
 144                 http_datestring(httpTomorow, sizeof httpTomorow,
 145                                 time(NULL) + 60 * 60 * 24 * 2);
 146
 147                 hprintf("Pragma: public\r\n"
 148                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 149                         "Last-modified: %s\r\n"
 150                         "Expires: %s\r\n",
 151                         httpnow,
 152                         httpTomorow
 153                 );
 154         }
 155         else {
 156                 hprintf("Pragma: no-cache\r\n"
 157                         "Cache-Control: no-store\r\n"
 158                         "Expires: -1\r\n"
 159                 );
 160         }
 161
 162         if (cache < 2) {
 163
 164                 stuff_to_cookie(cookie, 1024,
 165                                 WCC->wc_session,
 166                                 WCC->wc_username,
 167                                 WCC->wc_password,
 168                                 WCC->wc_roomname,
 169                                 get_selected_language()
 170                         );
 171
 172                 if (unset_cookies) {
 173                         hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 174                 } else {
 175                         hprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 176                         if (server_cookie != NULL) {
 177                                 hprintf("%s\n", server_cookie);
 178                         }
 179                 }
 180         }
 181
 182         if (do_htmlhead) {
 183                 begin_burst();
 184                 do_template("head", NULL);
 185
 186                 /* check for ImportantMessages (these display in a div overlaying the main screen) */
 187                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 188                         wc_printf("<div id=\"important_message\">\n"
 189                                 "<span class=\"imsg\">");
 190                         StrEscAppend(WCC->WBuf, NULL, WCC->ImportantMessage, 0, 0);
 191                         wc_printf("</span><br />\n"
 192                                 "</div>\n"
 193                         );
 194                         StrBufAppendBufPlain(WCC->trailing_javascript,
 195                                              HKEY("setTimeout('hide_imsg_popup()', 5000);       \n"),
 196                                              0
 197                         );
 198                         WCC->ImportantMessage[0] = 0;
 199                 }
 200                 else if (StrLength(WCC->ImportantMsg) > 0) {
 201                         wc_printf("<div id=\"important_message\">\n"
 202                                 "<span class=\"imsg\">");
 203                         StrEscAppend(WCC->WBuf, WCC->ImportantMsg, NULL, 0, 0);
 204                         wc_printf("</span><br />\n"
 205                                 "</div>\n"
 206                         );
 207                         StrBufAppendBufPlain(WCC->trailing_javascript,
 208                                              HKEY("setTimeout('hide_imsg_popup()', 5000);       \n"),
 209                                              0
 210                         );
 211                         FlushStrBuf(WCC->ImportantMsg);
 212                 }
 213                 if ( (WCC->logged_in) && (!unset_cookies) ) {
 214                         DoTemplate(HKEY("paging"), NULL, &NoCtx);
 215                 }
 216
 217                 if (do_room_banner == 1) {
 218                         wc_printf("<div id=\"banner\">\n");
 219                         embed_room_banner(NULL, navbar_default);
 220                         wc_printf("</div>\n");
 221                 }
 222         }
 223
 224         if (do_room_banner == 1) {
 225                 wc_printf("<div id=\"content\">\n");
 226         }
 227 }
 228
 229 void output_custom_content_header(const char *ctype) {
 230   hprintf("HTTP/1.1 200 OK\r\n");
 231   hprintf("Content-type: %s; charset=utf-8\r\n",ctype);
 232   hprintf("Server: %s / %s\r\n", PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software));
 233   hprintf("Connection: close\r\n");
 234 }
 235
 236
 237 /*
 238  * Generic function to do an HTTP redirect.  Easy and fun.
 239  */
 240 void http_redirect(const char *whichpage) {
 241         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 242         hprintf("Location: %s\r\n", whichpage);
 243         hprintf("URI: %s\r\n", whichpage);
 244         hprintf("Content-type: text/html; charset=utf-8\r\n");
 245         begin_burst();
 246         wc_printf("<html><body>");
 247         wc_printf("Go <a href=\"%s\">here</A>.", whichpage);
 248         wc_printf("</body></html>\n");
 249         end_burst();
 250 }
 251
 252
 253
 254 /*
 255  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 256  */
 257 void http_transmit_thing(const char *content_type,
 258                          int is_static) {
 259
 260 #ifndef TECH_PREVIEW
 261         lprintf(9, "http_transmit_thing(%s)%s\n",
 262                 content_type,
 263                 ((is_static > 0) ? " (static)" : "")
 264         );
 265 #endif
 266         output_headers(0, 0, 0, 0, 0, is_static);
 267
 268         hprintf("Content-type: %s\r\n"
 269                 "Server: %s\r\n"
 270                 "Connection: close\r\n",
 271                 content_type,
 272                 PACKAGE_STRING);
 273
 274         end_burst();
 275 }
 276
 277
 278 /*
 279  * Convenience functions to display a page containing only a string
 280  *
 281  * titlebarcolor        color of the titlebar of the frame
 282  * titlebarmsg          text to display in the title bar
 283  * messagetext          body of the box
 284  */
 285 void convenience_page(const char *titlebarcolor, const char *titlebarmsg, const char *messagetext)
 286 {
 287         hprintf("HTTP/1.1 200 OK\n");
 288         output_headers(1, 1, 2, 0, 0, 0);
 289         wc_printf("<div id=\"banner\">\n");
 290         wc_printf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 291         wc_printf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 292         wc_printf("</td></tr></table>\n");
 293         wc_printf("</div>\n<div id=\"content\">\n");
 294         escputs(messagetext);
 295
 296         wc_printf("<hr />\n");
 297         wDumpContent(1);
 298 }
 299
 300
 301 /*
 302  * Display a blank page.
 303  */
 304 void blank_page(void) {
 305         output_headers(1, 1, 0, 0, 0, 0);
 306         wDumpContent(2);
 307 }
 308
 309
 310 /*
 311  * A template has been requested
 312  */
 313 void url_do_template(void) {
 314         const StrBuf *MimeType;
 315         const StrBuf *Tmpl = sbstr("template");
 316         begin_burst();
 317         MimeType = DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 318         http_transmit_thing(ChrPtr(MimeType), 0);
 319 }
 320
 321
 322
 323 /*
 324  * convenience function to indicate success
 325  */
 326 void display_success(char *successmessage)
 327 {
 328         convenience_page("007700", "OK", successmessage);
 329 }
 330
 331
 332 /*
 333  * Authorization required page
 334  * This is probably temporary and should be revisited
 335  */
 336 void authorization_required(void)
 337 {
 338         wcsession *WCC = WC;
 339         const char *message = "";
 340
 341         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 342         hprintf(
 343                 "Server: %s / %s\r\n"
 344                 "Connection: close\r\n",
 345                 PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software)
 346         );
 347         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(WC->serv_info->serv_humannode));
 348         hprintf("Content-Type: text/html\r\n");
 349         begin_burst();
 350         wc_printf("<h1>");
 351         wc_printf(_("Authorization Required"));
 352         wc_printf("</h1>\r\n");
 353
 354
 355         if (WCC->ImportantMsg != NULL)
 356                 message = ChrPtr(WCC->ImportantMsg);
 357         else if (WCC->ImportantMessage != NULL)
 358                 message = WCC->ImportantMessage;
 359
 360         wc_printf(_("The resource you requested requires a valid username and password. "
 361                 "You could not be logged in: %s\n"), message);
 362         wDumpContent(0);
 363         end_webcit_session();
 364 }
 365
 366 /*
 367  * Convenience functions to wrap around asynchronous ajax responses
 368  */
 369 void begin_ajax_response(void) {
 370         wcsession *WCC = WC;
 371
 372         FlushStrBuf(WCC->HBuf);
 373         output_headers(0, 0, 0, 0, 0, 0);
 374
 375         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 376                 "Server: %s\r\n"
 377                 "Connection: close\r\n"
 378                 ,
 379                 PACKAGE_STRING);
 380         begin_burst();
 381 }
 382
 383 /*
 384  * print ajax response footer
 385  */
 386 void end_ajax_response(void) {
 387         wDumpContent(0);
 388 }
 389
 390
 391
 392 /*
 393  * Wraps a Citadel server command in an AJAX transaction.
 394  */
 395 void ajax_servcmd(void)
 396 {
 397         wcsession *WCC = WC;
 398         int Done = 0;
 399         StrBuf *Buf;
 400         char *junk;
 401         size_t len;
 402
 403         begin_ajax_response();
 404         Buf = NewStrBuf();
 405         serv_puts(bstr("g_cmd"));
 406         StrBuf_ServGetln(Buf);
 407         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 408         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 409
 410         switch (GetServerStatus(Buf, NULL)) {
 411         case 8:
 412                 serv_puts("\n\n000");
 413                 if ( (StrLength(Buf)==3) &&
 414                      !strcmp(ChrPtr(Buf), "000")) {
 415                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\000"), 0);
 416                         break;
 417                 }
 418         case 1:
 419                 while (!Done) {
 420                         StrBuf_ServGetln(Buf);
 421                         if ( (StrLength(Buf)==3) &&
 422                              !strcmp(ChrPtr(Buf), "000")) {
 423                                 Done = 1;
 424                         }
 425                         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 426                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 427                 }
 428                 break;
 429         case 4:
 430                 text_to_server(bstr("g_input"));
 431                 serv_puts("000");
 432                 break;
 433         case 6:
 434                 len = atol(&ChrPtr(Buf)[4]);
 435                 StrBuf_ServGetBLOBBuffered(Buf, len);
 436                 break;
 437         case 7:
 438                 len = atol(&ChrPtr(Buf)[4]);
 439                 junk = malloc(len);
 440                 memset(junk, 0, len);
 441                 serv_write(junk, len);
 442                 free(junk);
 443         }
 444
 445         end_ajax_response();
 446
 447         /*
 448          * This is kind of an ugly hack, but this is the only place it can go.
 449          * If the command was GEXP, then the instant messenger window must be
 450          * running, so reset the "last_pager_check" watchdog timer so
 451          * that page_popup() doesn't try to open it a second time.
 452          */
 453         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 454                 WCC->last_pager_check = time(NULL);
 455         }
 456         FreeStrBuf(&Buf);
 457 }
 458
 459
 460 /*
 461  * Helper function for the asynchronous check to see if we need
 462  * to open the instant messenger window.
 463  */
 464 void seconds_since_last_gexp(void)
 465 {
 466         char buf[256];
 467
 468         if ( (time(NULL) - WC->last_pager_check) < 30) {
 469                 wc_printf("NO\n");
 470         }
 471         else {
 472                 memset(buf, 0, 5);
 473                 serv_puts("NOOP");
 474                 serv_getln(buf, sizeof buf);
 475                 if (buf[3] == '*') {
 476                         wc_printf("YES");
 477                 }
 478                 else {
 479                         wc_printf("NO");
 480                 }
 481         }
 482 }
 483
 484
 485
 486 void ReadPostData(void)
 487 {
 488         int body_start = 0;
 489         wcsession *WCC = WC;
 490         StrBuf *content = NULL;
 491
 492         content = NewStrBufPlain(NULL, WCC->Hdr->HR.ContentLength + 256);
 493
 494         StrBufPrintf(content,
 495                      "Content-type: %s\n"
 496                      "Content-length: %ld\n\n",
 497                      ChrPtr(WCC->Hdr->HR.ContentType),
 498                              WCC->Hdr->HR.ContentLength);
 499 /*
 500   hprintf("Content-type: %s\n"
 501   "Content-length: %d\n\n",
 502   ContentType, ContentLength);
 503 */
 504         body_start = StrLength(content);
 505
 506         /** Read the entire input data at once. */
 507         client_read_to(WCC->Hdr, content,
 508                        WCC->Hdr->HR.ContentLength,
 509                        SLEEPING);
 510
 511         if (!strncasecmp(ChrPtr(WCC->Hdr->HR.ContentType), "application/x-www-form-urlencoded", 33)) {
 512                 StrBufCutLeft(content, body_start);
 513                 ParseURLParams(content);
 514         } else if (!strncasecmp(ChrPtr(WCC->Hdr->HR.ContentType), "multipart", 9)) {
 515                 char *Buf;
 516                 char *BufEnd;
 517                 long len;
 518
 519                 len = StrLength(content);
 520                 Buf = SmashStrBuf(&content);
 521                 BufEnd = Buf + len;
 522                 mime_parser(Buf, BufEnd, *upload_handler, NULL, NULL, NULL, 0);
 523                 free(Buf);
 524         } else if (WCC->Hdr->HR.ContentLength > 0) {
 525                 WCC->upload = content;
 526                 WCC->upload_length = StrLength(WCC->upload);
 527                 content = NULL;
 528         }
 529         FreeStrBuf(&content);
 530 }
 531
 532
 533 void ParseREST_URL(void)
 534 {
 535         StrBuf *Buf;
 536         StrBuf *pFloor = NULL;
 537         wcsession *WCC = WC;
 538         long i = 0;
 539         const char *pCh = NULL;
 540         HashList *Floors;
 541         void *vFloor;
 542
 543         WCC->Directory = NewHash(1, Flathash);
 544
 545         Buf = NewStrBuf();
 546         while (StrBufExtract_NextToken(WCC->Hdr->HR.ReqLine,
 547                                        Buf, &pCh,  '/') >= 0)
 548         {
 549                 Put(WCC->Directory, IKEY(i), Buf, HFreeStrBuf);
 550                 if (i==0)
 551                         pFloor = Buf;
 552                 i++;
 553                 Buf = NewStrBuf();
 554         }
 555         if (i == 0)
 556                 FreeStrBuf(&Buf);
 557         else if (pFloor != NULL)
 558         {
 559                 Floors = GetFloorListHash(NULL, NULL);
 560
 561                 if (Floors != NULL)
 562                 {
 563                         if (GetHash(Floors, SKEY(pFloor), &vFloor))
 564                                 WCC->CurrentFloor = (floor*) vFloor;
 565                 }
 566         }
 567 }
 568
 569
 570
 571
 572 /*
 573  * Entry point for WebCit transaction
 574  */
 575 void session_loop(void)
 576 {
 577         int Flags = 0;
 578         int xhttp;
 579         StrBuf *Buf;
 580
 581         /*
 582          * We stuff these with the values coming from the client cookies,
 583          * so we can use them to reconnect a timed out session if we have to.
 584          */
 585         wcsession *WCC;
 586
 587
 588         Buf = NewStrBuf();
 589
 590         WCC= WC;
 591
 592         WCC->upload_length = 0;
 593         WCC->upload = NULL;
 594         WCC->is_mobile = 0;
 595         WCC->trailing_javascript = NewStrBuf();
 596         WCC->Hdr->nWildfireHeaders = 0;
 597         if (WCC->Hdr->HR.Handler != NULL)
 598                 Flags = WCC->Hdr->HR.Handler->Flags; /* so we can temporarily add our own... */
 599
 600         if (WCC->Hdr->HR.ContentLength > 0) {
 601                 ReadPostData();
 602         }
 603
 604         /* If there are variables in the URL, we must grab them now */
 605         if (WCC->Hdr->PlainArgs != NULL)
 606                 ParseURLParams(WCC->Hdr->PlainArgs);
 607
 608         /* If the client sent a nonce that is incorrect, kill the request. */
 609         if (havebstr("nonce")) {
 610                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 611                         bstr("nonce"), WCC->nonce);
 612                 if (ibstr("nonce") != WCC->nonce) {
 613                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 614                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 615                         hprintf("Content-Type: text/plain\r\n");
 616                         begin_burst();
 617                         wc_printf("Security check failed.\r\n");
 618                         end_burst();
 619                         goto SKIP_ALL_THIS_CRAP;
 620                 }
 621         }
 622
 623         /*
 624          * If we're not connected to a Citadel server, try to hook up the
 625          * connection now.
 626          */
 627         if (!WCC->connected) {
 628                 if (GetConnected ())
 629                         goto SKIP_ALL_THIS_CRAP;
 630         }
 631
 632
 633         /*
 634          * If we're not logged in, but we have authentication data (either from
 635          * a cookie or from http-auth), try logging in to Citadel using that.
 636          */
 637         if ((!WCC->logged_in)
 638             && (StrLength(WCC->Hdr->c_username) > 0)
 639             && (StrLength(WCC->Hdr->c_password) > 0))
 640         {
 641                 FlushStrBuf(Buf);
 642                 serv_printf("USER %s", ChrPtr(WCC->Hdr->c_username));
 643                 StrBuf_ServGetln(Buf);
 644                 if (GetServerStatus(Buf, NULL) == 3) {
 645                         serv_printf("PASS %s", ChrPtr(WCC->Hdr->c_password));
 646                         StrBuf_ServGetln(Buf);
 647                         if (GetServerStatus(Buf, NULL) == 2) {
 648                                 become_logged_in(WCC->Hdr->c_username,
 649                                                  WCC->Hdr->c_password, Buf);
 650                         } else {
 651                                 /* Should only display when password is wrong */
 652                                 WCC->ImportantMsg = NewStrBufPlain(ChrPtr(Buf) + 4, StrLength(Buf) - 4);
 653                                 authorization_required();
 654                                 FreeStrBuf(&Buf);
 655                                 goto SKIP_ALL_THIS_CRAP;
 656                         }
 657                 }
 658         }
 659
 660         xhttp = (WCC->Hdr->HR.eReqType != eGET) &&
 661                 (WCC->Hdr->HR.eReqType != ePOST) &&
 662                 (WCC->Hdr->HR.eReqType != eHEAD);
 663
 664         /*
 665          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 666          * prior to doing anything else.
 667          */
 668         if (havebstr("gotofirst")) {
 669                 int ret;
 670                 ret = gotoroom(sbstr("gotofirst"));     /* do quietly to avoid session output! */
 671                 if ((ret/100) != 2) {
 672                         lprintf(1, "GOTOFIRST: Unable to change to [%s]; Reason: %d\n",
 673                                 bstr("gotofirst"), ret);
 674                 }
 675         }
 676
 677         /*
 678          * If we aren't in any room yet, but we have cookie data telling us where we're
 679          * supposed to be, and 'gotofirst' was not specified, then go there.
 680          */
 681         else if ( (StrLength(WCC->wc_roomname) == 0) && ( (StrLength(WCC->Hdr->c_roomname) > 0) )) {
 682                 int ret;
 683
 684                 lprintf(9, "We are in '%s' but cookie indicates '%s', going there...\n",
 685                         ChrPtr(WCC->wc_roomname),
 686                         ChrPtr(WCC->Hdr->c_roomname)
 687                 );
 688                 ret = gotoroom(WCC->Hdr->c_roomname);   /* do quietly to avoid session output! */
 689                 if ((ret/100) != 2) {
 690                         lprintf(1, "COOKIEGOTO: Unable to change to [%s]; Reason: %d\n",
 691                                 ChrPtr(WCC->Hdr->c_roomname), ret);
 692                 }
 693         }
 694
 695         if (WCC->Hdr->HR.Handler != NULL) {
 696                 if (!WCC->logged_in && ((WCC->Hdr->HR.Handler->Flags & ANONYMOUS) == 0)) {
 697                         display_login(NULL);
 698                 }
 699                 else {
 700 /*
 701                         if ((WCC->Hdr->HR.Handler->Flags & PARSE_REST_URL) != 0)
 702                                 ParseREST_URL();
 703 */
 704                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 705                                 begin_ajax_response();
 706                         WCC->Hdr->HR.Handler->F();
 707                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 708                                 end_ajax_response();
 709                 }
 710         }
 711         /* When all else fais, display the main menu. */
 712         else {
 713                 /*
 714                  * ordinary browser users get a nice login screen, DAV etc. requsets
 715                  * are given a 401 so they can handle it appropriate.
 716                  */
 717                 if (!WCC->logged_in)  {
 718                         if (xhttp)
 719                                 authorization_required();
 720                         else
 721                                 display_login(NULL);
 722                 }
 723                 /*
 724                  * Toplevel dav requests? or just a flat browser request?
 725                  */
 726                 else {
 727                         if (xhttp)
 728                                 groupdav_main();
 729                         else
 730                                 display_main_menu();
 731                 }
 732         }
 733
 734 SKIP_ALL_THIS_CRAP:
 735         FreeStrBuf(&Buf);
 736         fflush(stdout);
 737 }
 738
 739
 740 /*
 741  * Replacement for sleep() that uses select() in order to avoid SIGALRM
 742  */
 743 void sleeeeeeeeeep(int seconds)
 744 {
 745         struct timeval tv;
 746
 747         tv.tv_sec = seconds;
 748         tv.tv_usec = 0;
 749         select(0, NULL, NULL, NULL, &tv);
 750 }
 751
 752
 753 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
 754 {
 755         wcsession *WCC = WC;
 756         if (WCC != NULL)
 757                 return ((!IsEmptyStr(WCC->ImportantMessage)) ||
 758                         (StrLength(WCC->ImportantMsg) > 0));
 759         else
 760                 return 0;
 761 }
 762
 763 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
 764 {
 765         wcsession *WCC = WC;
 766
 767         if (WCC != NULL) {
 768                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 769                         StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
 770                         WCC->ImportantMessage[0] = '\0';
 771                 }
 772                 else if (StrLength(WCC->ImportantMsg) > 0) {
 773                         StrEscAppend(Target, WCC->ImportantMsg, NULL, 0, 0);
 774                         FlushStrBuf(WCC->ImportantMsg);
 775                 }
 776         }
 777 }
 778
 779 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
 780 {
 781         wcsession *WCC = WC;
 782
 783         if (WCC != NULL)
 784                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
 785 }
 786
 787 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
 788 {
 789         StrBufAppendBuf(Target,
 790                         csslocal, 0);
 791 }
 792
 793 extern char static_local_dir[PATH_MAX];
 794
 795
 796 void
 797 InitModule_WEBCIT
 798 (void)
 799 {
 800         char dir[SIZ];
 801         WebcitAddUrlHandler(HKEY("blank"), "", 0, blank_page, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 802         WebcitAddUrlHandler(HKEY("do_template"), "", 0, url_do_template, ANONYMOUS);
 803         WebcitAddUrlHandler(HKEY("sslg"), "", 0, seconds_since_last_gexp, AJAX|LOGCHATTY);
 804         WebcitAddUrlHandler(HKEY("ajax_servcmd"), "", 0, ajax_servcmd, 0);
 805         WebcitAddUrlHandler(HKEY("webcit"), "", 0, blank_page, URLNAMESPACE);
 806
 807         WebcitAddUrlHandler(HKEY("401"), "", 0, authorization_required, ANONYMOUS|COOKIEUNNEEDED);
 808         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
 809         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, NULL, CTX_NONE);
 810         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, NULL, CTX_NONE);
 811         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, NULL, CTX_NONE);
 812
 813         snprintf(dir, SIZ, "%s/webcit.css", static_local_dir);
 814         if (!access(dir, R_OK)) {
 815                 lprintf(9, "Using local Stylesheet [%s]\n", dir);
 816                 csslocal = NewStrBufPlain(HKEY("<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\" />"));
 817         }
 818         else
 819                 lprintf(9, "No Site-local Stylesheet [%s] installed. \n", dir);
 820
 821 }
 822
 823 void
 824 ServerStartModule_WEBCIT
 825 (void)
 826 {
 827         HandlerHash = NewHash(1, NULL);
 828 }
 829
 830
 831 void
 832 ServerShutdownModule_WEBCIT
 833 (void)
 834 {
 835         FreeStrBuf(&csslocal);
 836         DeleteHash(&HandlerHash);
 837 }
 838
 839
 840
 841 void
 842 SessionNewModule_WEBCIT
 843 (wcsession *sess)
 844 {
 845         sess->ImportantMsg = NewStrBuf();
 846         sess->WBuf = NewStrBufPlain(NULL, SIZ * 4);
 847         sess->HBuf = NewStrBufPlain(NULL, SIZ / 4);
 848 }
 849
 850 void
 851 SessionDetachModule_WEBCIT
 852 (wcsession *sess)
 853 {
 854         DeleteHash(&sess->Directory);
 855
 856         FreeStrBuf(&sess->upload);
 857         sess->upload_length = 0;
 858
 859         FreeStrBuf(&sess->trailing_javascript);
 860
 861         if (StrLength(sess->WBuf) > SIZ * 30) /* Bigger than 120K? release. */
 862         {
 863                 FreeStrBuf(&sess->WBuf);
 864                 sess->WBuf = NewStrBuf();
 865         }
 866         else
 867                 FlushStrBuf(sess->WBuf);
 868         FlushStrBuf(sess->HBuf);
 869 }
 870
 871 void
 872 SessionDestroyModule_WEBCIT
 873 (wcsession *sess)
 874 {
 875         FreeStrBuf(&sess->WBuf);
 876         FreeStrBuf(&sess->HBuf);
 877         FreeStrBuf(&sess->ImportantMsg);
 878 }
 879