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 StrBuf *csslocal = NULL;
  17 HashList *HandlerHash = NULL;
  18
  19
  20 void DeleteWebcitHandler(void *vHandler)
  21 {
  22         WebcitHandler *Handler = (WebcitHandler*) vHandler;
  23         FreeStrBuf(&Handler->Name);
  24         FreeStrBuf(&Handler->DisplayName);
  25         free (Handler);
  26 }
  27
  28 void WebcitAddUrlHandler(const char * UrlString, long UrlSLen,
  29                          const char *DisplayName, long dslen,
  30                          WebcitHandlerFunc F,
  31                          long Flags)
  32 {
  33         WebcitHandler *NewHandler;
  34         NewHandler = (WebcitHandler*) malloc(sizeof(WebcitHandler));
  35         NewHandler->F = F;
  36         NewHandler->Flags = Flags;
  37         NewHandler->Name = NewStrBufPlain(UrlString, UrlSLen);
  38         StrBufShrinkToFit(NewHandler->Name, 1);
  39         NewHandler->DisplayName = NewStrBufPlain(DisplayName, dslen);
  40         StrBufShrinkToFit(NewHandler->DisplayName, 1);
  41         Put(HandlerHash, UrlString, UrlSLen, NewHandler, DeleteWebcitHandler);
  42 }
  43
  44 void tmplput_HANDLER_DISPLAYNAME(StrBuf *Target, WCTemplputParams *TP)
  45 {
  46         wcsession *WCC = WC;
  47         if (WCC->Hdr->HR.Handler != NULL)
  48                 StrBufAppendTemplate(Target, TP, WCC->Hdr->HR.Handler->DisplayName, 0);
  49 }
  50
  51 void tmplput_HOST_DISPLAYNAME(StrBuf *Target, WCTemplputParams *TP)
  52 {
  53         wcsession *WCC = WC;
  54         StrBufAppendTemplate(Target, TP, WCC->Hdr->HR.http_host, 0);
  55 }
  56
  57 /*
  58  * web-printing funcion. uses our vsnprintf wrapper
  59  */
  60 #ifdef UBER_VERBOSE_DEBUGGING
  61 void wcc_printf(const char *FILE, const char *FUNCTION, long LINE, const char *format,...)
  62 #else
  63 void wc_printf(const char *format,...)
  64 #endif
  65 {
  66         wcsession *WCC = WC;
  67         va_list arg_ptr;
  68
  69         if (WCC->WBuf == NULL)
  70                 WCC->WBuf = NewStrBuf();
  71 #ifdef UBER_VERBOSE_DEBUGGING
  72         StrBufAppendPrintf(WCC->WBuf, "\n%s:%s:%d[", FILE, FUNCTION, LINE);
  73 #endif
  74
  75         va_start(arg_ptr, format);
  76         StrBufVAppendPrintf(WCC->WBuf, format, arg_ptr);
  77         va_end(arg_ptr);
  78 #ifdef UBER_VERBOSE_DEBUGGING
  79         StrBufAppendPrintf(WCC->WBuf, "]\n");
  80 #endif
  81 }
  82
  83 /*
  84  * http-header-printing funcion. uses our vsnprintf wrapper
  85  */
  86 void hprintf(const char *format,...)
  87 {
  88         wcsession *WCC = WC;
  89         va_list arg_ptr;
  90
  91         va_start(arg_ptr, format);
  92         StrBufVAppendPrintf(WCC->HBuf, format, arg_ptr);
  93         va_end(arg_ptr);
  94 }
  95
  96
  97
  98 /*
  99  * wrap up an HTTP session, closes tags, etc.
 100  *
 101  * print_standard_html_footer should be set to:
 102  * 0            - to transmit only,
 103  * nonzero      - to append the closing tags
 104  */
 105 void wDumpContent(int print_standard_html_footer)
 106 {
 107         if (print_standard_html_footer) {
 108                 wc_printf("</div> <!-- end of 'content' div -->\n");
 109                 do_template("trailing", NULL);
 110         }
 111
 112         /* If we've been saving it all up for one big output burst,
 113          * go ahead and do that now.
 114          */
 115         end_burst();
 116 }
 117
 118
 119
 120
 121 /*
 122  * Output HTTP headers and leading HTML for a page
 123  */
 124 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 125                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 126
 127                         int do_room_banner,     /* 0=no, 1=yes,
 128                                                  * 2 = I'm going to embed my own, so don't open the
 129                                                  *     <div id="content"> either.
 130                                                  */
 131
 132                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 133                         int suppress_check,     /* 1 = suppress check for instant messages          */
 134                         int cache               /* 1 = allow browser to cache this page             */
 135 ) {
 136         wcsession *WCC = WC;
 137         char httpnow[128];
 138
 139         hprintf("HTTP/1.1 200 OK\n");
 140         http_datestring(httpnow, sizeof httpnow, time(NULL));
 141
 142         if (do_httpheaders) {
 143                 if (WCC->serv_info != NULL)
 144                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 145                                 "Server: %s / %s\n"
 146                                 "Connection: close\r\n",
 147                                 PACKAGE_STRING,
 148                                 ChrPtr(WCC->serv_info->serv_software));
 149                 else
 150                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 151                                 "Server: %s / [n/a]\n"
 152                                 "Connection: close\r\n",
 153                                 PACKAGE_STRING);
 154         }
 155
 156         if (cache > 0) {
 157                 char httpTomorow[128];
 158
 159                 http_datestring(httpTomorow, sizeof httpTomorow,
 160                                 time(NULL) + 60 * 60 * 24 * 2);
 161
 162                 hprintf("Pragma: public\r\n"
 163                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 164                         "Last-modified: %s\r\n"
 165                         "Expires: %s\r\n",
 166                         httpnow,
 167                         httpTomorow
 168                 );
 169         }
 170         else {
 171                 hprintf("Pragma: no-cache\r\n"
 172                         "Cache-Control: no-store\r\n"
 173                         "Expires: -1\r\n"
 174                 );
 175         }
 176
 177         if (cache < 2) stuff_to_cookie(unset_cookies);
 178
 179         if (do_htmlhead) {
 180                 begin_burst();
 181                 do_template("head", NULL);
 182
 183                 /* check for ImportantMessages (these display in a div overlaying the main screen) */
 184                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 185                         wc_printf("<div id=\"important_message\">\n"
 186                                 "<span class=\"imsg\">");
 187                         StrEscAppend(WCC->WBuf, NULL, WCC->ImportantMessage, 0, 0);
 188                         wc_printf("</span><br />\n"
 189                                 "</div>\n"
 190                         );
 191                         StrBufAppendBufPlain(WCC->trailing_javascript,
 192                                              HKEY("setTimeout('hide_imsg_popup()', 5000);       \n"),
 193                                              0
 194                         );
 195                         WCC->ImportantMessage[0] = 0;
 196                 }
 197                 else if (StrLength(WCC->ImportantMsg) > 0) {
 198                         wc_printf("<div id=\"important_message\">\n"
 199                                 "<span class=\"imsg\">");
 200                         StrEscAppend(WCC->WBuf, WCC->ImportantMsg, NULL, 0, 0);
 201                         wc_printf("</span><br />\n"
 202                                 "</div>\n"
 203                         );
 204                         StrBufAppendBufPlain(WCC->trailing_javascript,
 205                                              HKEY("setTimeout('hide_imsg_popup()', 5000);       \n"),
 206                                              0
 207                         );
 208                         FlushStrBuf(WCC->ImportantMsg);
 209                 }
 210                 if ( (WCC->logged_in) && (!unset_cookies) ) {
 211                         DoTemplate(HKEY("paging"), NULL, &NoCtx);
 212                 }
 213
 214                 if (do_room_banner == 1) {
 215                         tmplput_roombanner(NULL, NULL);
 216                 }
 217         }
 218
 219         if (do_room_banner == 1) {
 220                 wc_printf("<div id=\"content\">\n");
 221         }
 222 }
 223
 224 void output_custom_content_header(const char *ctype) {
 225   hprintf("HTTP/1.1 200 OK\r\n");
 226   hprintf("Content-type: %s; charset=utf-8\r\n",ctype);
 227   hprintf("Server: %s / %s\r\n", PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software));
 228   hprintf("Connection: close\r\n");
 229 }
 230
 231
 232 /*
 233  * Generic function to do an HTTP redirect.  Easy and fun.
 234  */
 235 void http_redirect(const char *whichpage) {
 236         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 237         hprintf("Location: %s\r\n", whichpage);
 238         hprintf("URI: %s\r\n", whichpage);
 239         hprintf("Content-type: text/html; charset=utf-8\r\n");
 240         begin_burst();
 241         wc_printf("<html><body>");
 242         wc_printf("Go <a href=\"%s\">here</A>.", whichpage);
 243         wc_printf("</body></html>\n");
 244         end_burst();
 245 }
 246
 247
 248
 249 /*
 250  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 251  */
 252 void http_transmit_thing(const char *content_type,
 253                          int is_static) {
 254
 255 #ifndef TECH_PREVIEW
 256         lprintf(9, "http_transmit_thing(%s)%s\n",
 257                 content_type,
 258                 ((is_static > 0) ? " (static)" : "")
 259         );
 260 #endif
 261         output_headers(0, 0, 0, 0, 0, is_static);
 262
 263         hprintf("Content-type: %s\r\n"
 264                 "Server: %s\r\n"
 265                 "Connection: close\r\n",
 266                 content_type,
 267                 PACKAGE_STRING);
 268
 269         end_burst();
 270 }
 271
 272
 273 /*
 274  * Convenience functions to display a page containing only a string
 275  *
 276  * titlebarcolor        color of the titlebar of the frame
 277  * titlebarmsg          text to display in the title bar
 278  * messagetext          body of the box
 279  */
 280 void convenience_page(const char *titlebarcolor, const char *titlebarmsg, const char *messagetext)
 281 {
 282         hprintf("HTTP/1.1 200 OK\n");
 283         output_headers(1, 1, 2, 0, 0, 0);
 284         wc_printf("<div id=\"banner\">\n");
 285         wc_printf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 286         wc_printf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 287         wc_printf("</td></tr></table>\n");
 288         wc_printf("</div>\n<div id=\"content\">\n");
 289         escputs(messagetext);
 290
 291         wc_printf("<hr />\n");
 292         wDumpContent(1);
 293 }
 294
 295
 296 /*
 297  * Display a blank page.
 298  */
 299 void blank_page(void) {
 300         output_headers(1, 1, 0, 0, 0, 0);
 301         wDumpContent(2);
 302 }
 303
 304
 305 /*
 306  * A template has been requested
 307  */
 308 void url_do_template(void) {
 309         const StrBuf *MimeType;
 310         const StrBuf *Tmpl = sbstr("template");
 311         begin_burst();
 312         MimeType = DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 313         http_transmit_thing(ChrPtr(MimeType), 0);
 314 }
 315
 316
 317
 318 /*
 319  * convenience function to indicate success
 320  */
 321 void display_success(char *successmessage)
 322 {
 323         convenience_page("007700", "OK", successmessage);
 324 }
 325
 326
 327 /*
 328  * Authorization required page
 329  * This is probably temporary and should be revisited
 330  */
 331 void authorization_required(void)
 332 {
 333         wcsession *WCC = WC;
 334         const char *message = "";
 335
 336         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 337         hprintf(
 338                 "Server: %s / %s\r\n"
 339                 "Connection: close\r\n",
 340                 PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software)
 341         );
 342         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(WC->serv_info->serv_humannode));
 343         hprintf("Content-Type: text/html\r\n");
 344         begin_burst();
 345         wc_printf("<h1>");
 346         wc_printf(_("Authorization Required"));
 347         wc_printf("</h1>\r\n");
 348
 349
 350         if (WCC->ImportantMsg != NULL)
 351                 message = ChrPtr(WCC->ImportantMsg);
 352         else if (WCC->ImportantMessage != NULL)
 353                 message = WCC->ImportantMessage;
 354
 355         wc_printf(_("The resource you requested requires a valid username and password. "
 356                 "You could not be logged in: %s\n"), message);
 357         wDumpContent(0);
 358         end_webcit_session();
 359 }
 360
 361 /*
 362  * Convenience functions to wrap around asynchronous ajax responses
 363  */
 364 void begin_ajax_response(void) {
 365         wcsession *WCC = WC;
 366
 367         FlushStrBuf(WCC->HBuf);
 368         output_headers(0, 0, 0, 0, 0, 0);
 369
 370         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 371                 "Server: %s\r\n"
 372                 "Connection: close\r\n"
 373                 ,
 374                 PACKAGE_STRING);
 375         begin_burst();
 376 }
 377
 378 /*
 379  * print ajax response footer
 380  */
 381 void end_ajax_response(void) {
 382         wDumpContent(0);
 383 }
 384
 385
 386
 387 /*
 388  * Wraps a Citadel server command in an AJAX transaction.
 389  */
 390 void ajax_servcmd(void)
 391 {
 392         wcsession *WCC = WC;
 393         int Done = 0;
 394         StrBuf *Buf;
 395         char *junk;
 396         size_t len;
 397
 398         begin_ajax_response();
 399         Buf = NewStrBuf();
 400         serv_puts(bstr("g_cmd"));
 401         StrBuf_ServGetln(Buf);
 402         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 403         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 404
 405         switch (GetServerStatus(Buf, NULL)) {
 406         case 8:
 407                 serv_puts("\n\n000");
 408                 if ( (StrLength(Buf)==3) &&
 409                      !strcmp(ChrPtr(Buf), "000")) {
 410                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\000"), 0);
 411                         break;
 412                 }
 413         case 1:
 414                 while (!Done) {
 415                         StrBuf_ServGetln(Buf);
 416                         if ( (StrLength(Buf)==3) &&
 417                              !strcmp(ChrPtr(Buf), "000")) {
 418                                 Done = 1;
 419                         }
 420                         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 421                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 422                 }
 423                 break;
 424         case 4:
 425                 text_to_server(bstr("g_input"));
 426                 serv_puts("000");
 427                 break;
 428         case 6:
 429                 len = atol(&ChrPtr(Buf)[4]);
 430                 StrBuf_ServGetBLOBBuffered(Buf, len);
 431                 break;
 432         case 7:
 433                 len = atol(&ChrPtr(Buf)[4]);
 434                 junk = malloc(len);
 435                 memset(junk, 0, len);
 436                 serv_write(junk, len);
 437                 free(junk);
 438         }
 439
 440         end_ajax_response();
 441
 442         /*
 443          * This is kind of an ugly hack, but this is the only place it can go.
 444          * If the command was GEXP, then the instant messenger window must be
 445          * running, so reset the "last_pager_check" watchdog timer so
 446          * that page_popup() doesn't try to open it a second time.
 447          */
 448         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 449                 WCC->last_pager_check = time(NULL);
 450         }
 451         FreeStrBuf(&Buf);
 452 }
 453
 454
 455 /*
 456  * Helper function for the asynchronous check to see if we need
 457  * to open the instant messenger window.
 458  */
 459 void seconds_since_last_gexp(void)
 460 {
 461         char buf[256];
 462
 463         if ( (time(NULL) - WC->last_pager_check) < 30) {
 464                 wc_printf("NO\n");
 465         }
 466         else {
 467                 memset(buf, 0, 5);
 468                 serv_puts("NOOP");
 469                 serv_getln(buf, sizeof buf);
 470                 if (buf[3] == '*') {
 471                         wc_printf("YES");
 472                 }
 473                 else {
 474                         wc_printf("NO");
 475                 }
 476         }
 477 }
 478
 479
 480
 481 int ReadPostData(void)
 482 {
 483         int rc;
 484         int body_start = 0;
 485         wcsession *WCC = WC;
 486         StrBuf *content = NULL;
 487
 488         content = NewStrBufPlain(NULL, WCC->Hdr->HR.ContentLength + 256);
 489
 490         StrBufPrintf(content,
 491                      "Content-type: %s\n"
 492                      "Content-length: %ld\n\n",
 493                      ChrPtr(WCC->Hdr->HR.ContentType),
 494                              WCC->Hdr->HR.ContentLength);
 495 /*
 496   hprintf("Content-type: %s\n"
 497   "Content-length: %d\n\n",
 498   ContentType, ContentLength);
 499 */
 500         body_start = StrLength(content);
 501
 502         /** Read the entire input data at once. */
 503         rc = client_read_to(WCC->Hdr, content,
 504                             WCC->Hdr->HR.ContentLength,
 505                             SLEEPING);
 506         if (rc < 0)
 507                 return rc;
 508
 509
 510         if (!strncasecmp(ChrPtr(WCC->Hdr->HR.ContentType), "application/x-www-form-urlencoded", 33)) {
 511                 StrBufCutLeft(content, body_start);
 512                 ParseURLParams(content);
 513         } else if (!strncasecmp(ChrPtr(WCC->Hdr->HR.ContentType), "multipart", 9)) {
 514                 char *Buf;
 515                 char *BufEnd;
 516                 long len;
 517
 518                 len = StrLength(content);
 519                 Buf = SmashStrBuf(&content);
 520                 BufEnd = Buf + len;
 521                 mime_parser(Buf, BufEnd, *upload_handler, NULL, NULL, NULL, 0);
 522                 free(Buf);
 523         } else if (WCC->Hdr->HR.ContentLength > 0) {
 524                 WCC->upload = content;
 525                 WCC->upload_length = StrLength(WCC->upload);
 526                 content = NULL;
 527         }
 528         FreeStrBuf(&content);
 529         return 1;
 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         lprintf(1, "parsing rest URL: %s\n", ChrPtr(WCC->Hdr->HR.ReqLine));
 544
 545         WCC->Directory = NewHash(1, Flathash);
 546         WCC->CurrentFloor = NULL;
 547
 548         Buf = NewStrBuf();
 549         while (StrBufExtract_NextToken(Buf, WCC->Hdr->HR.ReqLine, &pCh,  '/') >= 0)
 550         {
 551                 if (StrLength(Buf) != 0) {
 552                         /* ignore empty path segments */
 553                         StrBufUnescape(Buf, 1);
 554                         Put(WCC->Directory, IKEY(i), Buf, HFreeStrBuf);
 555                         if (i==0)
 556                                 pFloor = Buf;
 557                         Buf = NewStrBuf();
 558                 }
 559                 i++;
 560         }
 561
 562         FreeStrBuf(&Buf);
 563         if (pFloor != NULL)
 564         {
 565                 Floors = GetFloorListHash(NULL, NULL);
 566
 567                 if (Floors != NULL)
 568                 {
 569                         if (GetHash(WCC->FloorsByName, SKEY(pFloor), &vFloor))
 570                                 WCC->CurrentFloor = (Floor*) vFloor;
 571                 }
 572         }
 573 }
 574
 575 int Conditional_REST_DEPTH(StrBuf *Target, WCTemplputParams *TP)
 576 {
 577         long Depth, IsDepth;
 578         long offset = 0;
 579         wcsession *WCC = WC;
 580
 581         if (WCC->Hdr->HR.Handler != NULL)
 582                 offset ++;
 583         Depth = GetTemplateTokenNumber(Target, TP, 2, 0);
 584         IsDepth = GetCount(WCC->Directory) + offset;
 585
 586 //      LogTemplateError(Target, "bla", 1, TP, "REST_DEPTH: %ld : %ld\n", Depth, IsDepth);
 587         if (Depth < 0) {
 588                 Depth = -Depth;
 589                 return IsDepth > Depth;
 590         }
 591         else
 592                 return Depth == IsDepth;
 593 }
 594
 595
 596
 597 /*
 598  * Entry point for WebCit transaction
 599  */
 600 void session_loop(void)
 601 {
 602         int Flags = 0;
 603         int xhttp;
 604         StrBuf *Buf;
 605
 606         /*
 607          * We stuff these with the values coming from the client cookies,
 608          * so we can use them to reconnect a timed out session if we have to.
 609          */
 610         wcsession *WCC;
 611
 612         WCC= WC;
 613         WCC->upload_length = 0;
 614         WCC->upload = NULL;
 615         WCC->is_mobile = 0;
 616         WCC->Hdr->nWildfireHeaders = 0;
 617         if (WCC->Hdr->HR.Handler != NULL)
 618                 Flags = WCC->Hdr->HR.Handler->Flags; /* so we can temporarily add our own... */
 619
 620         if (WCC->Hdr->HR.ContentLength > 0) {
 621                 if (ReadPostData() < 0) {
 622                         return;
 623                 }
 624         }
 625
 626         Buf = NewStrBuf();
 627         WCC->trailing_javascript = NewStrBuf();
 628
 629         /* If there are variables in the URL, we must grab them now */
 630         if (WCC->Hdr->PlainArgs != NULL)
 631                 ParseURLParams(WCC->Hdr->PlainArgs);
 632
 633         /* If the client sent a nonce that is incorrect, kill the request. */
 634         if (havebstr("nonce")) {
 635                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 636                         bstr("nonce"), WCC->nonce);
 637                 if (ibstr("nonce") != WCC->nonce) {
 638                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 639                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 640                         hprintf("Content-Type: text/plain\r\n");
 641                         begin_burst();
 642                         wc_printf("Security check failed.\r\n");
 643                         end_burst();
 644                         goto SKIP_ALL_THIS_CRAP;
 645                 }
 646         }
 647
 648         /*
 649          * If we're not connected to a Citadel server, try to hook up the
 650          * connection now.
 651          */
 652         if (!WCC->connected) {
 653                 if (GetConnected ())
 654                         goto SKIP_ALL_THIS_CRAP;
 655         }
 656
 657
 658         /*
 659          * If we're not logged in, but we have authentication data (either from
 660          * a cookie or from http-auth), try logging in to Citadel using that.
 661          */
 662         if ((!WCC->logged_in)
 663             && (StrLength(WCC->Hdr->c_username) > 0)
 664             && (StrLength(WCC->Hdr->c_password) > 0))
 665         {
 666                 long Status;
 667
 668                 FlushStrBuf(Buf);
 669                 serv_printf("USER %s", ChrPtr(WCC->Hdr->c_username));
 670                 StrBuf_ServGetln(Buf);
 671                 if (GetServerStatus(Buf, &Status) == 3) {
 672                         serv_printf("PASS %s", ChrPtr(WCC->Hdr->c_password));
 673                         StrBuf_ServGetln(Buf);
 674                         if (GetServerStatus(Buf, NULL) == 2) {
 675                                 become_logged_in(WCC->Hdr->c_username,
 676                                                  WCC->Hdr->c_password, Buf);
 677                         } else {
 678                                 /* Should only display when password is wrong */
 679                                 WCC->ImportantMsg = NewStrBufPlain(ChrPtr(Buf) + 4, StrLength(Buf) - 4);
 680                                 authorization_required();
 681                                 FreeStrBuf(&Buf);
 682                                 goto SKIP_ALL_THIS_CRAP;
 683                         }
 684                 }
 685                 else if (Status == 541) {
 686                         WCC->logged_in = 1;
 687                 }
 688         }
 689
 690         xhttp = (WCC->Hdr->HR.eReqType != eGET) &&
 691                 (WCC->Hdr->HR.eReqType != ePOST) &&
 692                 (WCC->Hdr->HR.eReqType != eHEAD);
 693
 694         /*
 695          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 696          * prior to doing anything else.
 697          */
 698         if (havebstr("gotofirst")) {
 699                 int ret;
 700                 ret = gotoroom(sbstr("gotofirst"));     /* do quietly to avoid session output! */
 701                 if ((ret/100) != 2) {
 702                         lprintf(1, "GOTOFIRST: Unable to change to [%s]; Reason: %d\n",
 703                                 bstr("gotofirst"), ret);
 704                 }
 705         }
 706
 707         /*
 708          * If we aren't in any room yet, but we have cookie data telling us where we're
 709          * supposed to be, and 'gotofirst' was not specified, then go there.
 710          */
 711         else if ( (StrLength(WCC->CurRoom.name) == 0) && ( (StrLength(WCC->Hdr->c_roomname) > 0) )) {
 712                 int ret;
 713
 714                 lprintf(9, "We are in '%s' but cookie indicates '%s', going there...\n",
 715                         ChrPtr(WCC->CurRoom.name),
 716                         ChrPtr(WCC->Hdr->c_roomname)
 717                 );
 718                 ret = gotoroom(WCC->Hdr->c_roomname);   /* do quietly to avoid session output! */
 719                 if ((ret/100) != 2) {
 720                         lprintf(1, "COOKIEGOTO: Unable to change to [%s]; Reason: %d\n",
 721                                 ChrPtr(WCC->Hdr->c_roomname), ret);
 722                 }
 723         }
 724
 725         if (WCC->Hdr->HR.Handler != NULL) {
 726                 if (!WCC->logged_in && ((WCC->Hdr->HR.Handler->Flags & ANONYMOUS) == 0)) {
 727                         display_login();
 728                 }
 729                 else {
 730 /*
 731                         if ((WCC->Hdr->HR.Handler->Flags & PARSE_REST_URL) != 0)
 732                                 ParseREST_URL();
 733 */
 734                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 735                                 begin_ajax_response();
 736                         WCC->Hdr->HR.Handler->F();
 737                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 738                                 end_ajax_response();
 739                 }
 740         }
 741         /* When all else fais, display the main menu. */
 742         else {
 743                 /*
 744                  * ordinary browser users get a nice login screen, DAV etc. requsets
 745                  * are given a 401 so they can handle it appropriate.
 746                  */
 747                 if (!WCC->logged_in)  {
 748                         if (xhttp)
 749                                 authorization_required();
 750                         else
 751                                 display_login();
 752                 }
 753                 /*
 754                  * Toplevel dav requests? or just a flat browser request?
 755                  */
 756                 else {
 757                         if (xhttp)
 758                                 groupdav_main();
 759                         else
 760                                 display_main_menu();
 761                 }
 762         }
 763
 764 SKIP_ALL_THIS_CRAP:
 765         FreeStrBuf(&Buf);
 766         fflush(stdout);
 767 }
 768
 769
 770 /*
 771  * Replacement for sleep() that uses select() in order to avoid SIGALRM
 772  */
 773 void sleeeeeeeeeep(int seconds)
 774 {
 775         struct timeval tv;
 776
 777         tv.tv_sec = seconds;
 778         tv.tv_usec = 0;
 779         select(0, NULL, NULL, NULL, &tv);
 780 }
 781
 782 int Conditional_IS_HTTPS(StrBuf *Target, WCTemplputParams *TP)
 783 {
 784         return is_https != 0;
 785 }
 786
 787 void AppendImportantMessage(const char *pch, long len)
 788 {
 789         wcsession *WCC = WC;
 790
 791         if (StrLength(WCC->ImportantMsg) > 0) {
 792                 StrBufAppendBufPlain(WCC->ImportantMsg, HKEY("\n"), 0);
 793         }
 794
 795         StrBufAppendBufPlain(WCC->ImportantMsg, pch, len, 0);
 796 }
 797
 798 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
 799 {
 800         wcsession *WCC = WC;
 801         if (WCC != NULL)
 802                 return ((!IsEmptyStr(WCC->ImportantMessage)) ||
 803                         (StrLength(WCC->ImportantMsg) > 0));
 804         else
 805                 return 0;
 806 }
 807
 808 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
 809 {
 810         wcsession *WCC = WC;
 811
 812         if (WCC != NULL) {
 813                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 814                         StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
 815                         WCC->ImportantMessage[0] = '\0';
 816                 }
 817                 else if (StrLength(WCC->ImportantMsg) > 0) {
 818                         StrEscAppend(Target, WCC->ImportantMsg, NULL, 0, 0);
 819                         FlushStrBuf(WCC->ImportantMsg);
 820                 }
 821         }
 822 }
 823
 824 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
 825 {
 826         wcsession *WCC = WC;
 827
 828         if (WCC != NULL)
 829                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
 830 }
 831
 832 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
 833 {
 834         StrBufAppendBuf(Target,
 835                         csslocal, 0);
 836 }
 837
 838 extern char static_local_dir[PATH_MAX];
 839
 840
 841 void
 842 InitModule_WEBCIT
 843 (void)
 844 {
 845         char dir[SIZ];
 846         WebcitAddUrlHandler(HKEY("blank"), "", 0, blank_page, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 847         WebcitAddUrlHandler(HKEY("do_template"), "", 0, url_do_template, ANONYMOUS);
 848         WebcitAddUrlHandler(HKEY("sslg"), "", 0, seconds_since_last_gexp, AJAX|LOGCHATTY);
 849         WebcitAddUrlHandler(HKEY("ajax_servcmd"), "", 0, ajax_servcmd, 0);
 850         WebcitAddUrlHandler(HKEY("webcit"), "", 0, blank_page, URLNAMESPACE);
 851
 852         WebcitAddUrlHandler(HKEY("401"), "", 0, authorization_required, ANONYMOUS|COOKIEUNNEEDED);
 853         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
 854         RegisterConditional(HKEY("COND:REST:DEPTH"), 0, Conditional_REST_DEPTH, CTX_NONE);
 855         RegisterConditional(HKEY("COND:IS_HTTPS"), 0, Conditional_IS_HTTPS, CTX_NONE);
 856
 857         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, NULL, CTX_NONE);
 858         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, NULL, CTX_NONE);
 859         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, NULL, CTX_NONE);
 860         RegisterNamespace("URL:DISPLAYNAME", 0, 1, tmplput_HANDLER_DISPLAYNAME, NULL, CTX_NONE);
 861         RegisterNamespace("URL:HOSTNAME", 0, 1, tmplput_HOST_DISPLAYNAME, NULL, CTX_NONE);
 862
 863
 864         snprintf(dir, SIZ, "%s/webcit.css", static_local_dir);
 865         if (!access(dir, R_OK)) {
 866                 lprintf(9, "Using local Stylesheet [%s]\n", dir);
 867                 csslocal = NewStrBufPlain(HKEY("<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\" />"));
 868         }
 869         else
 870                 lprintf(9, "No Site-local Stylesheet [%s] installed. \n", dir);
 871
 872 }
 873
 874 void
 875 ServerStartModule_WEBCIT
 876 (void)
 877 {
 878         HandlerHash = NewHash(1, NULL);
 879 }
 880
 881
 882 void
 883 ServerShutdownModule_WEBCIT
 884 (void)
 885 {
 886         FreeStrBuf(&csslocal);
 887         DeleteHash(&HandlerHash);
 888 }
 889
 890
 891
 892 void
 893 SessionNewModule_WEBCIT
 894 (wcsession *sess)
 895 {
 896         sess->ImportantMsg = NewStrBuf();
 897         sess->WBuf = NewStrBufPlain(NULL, SIZ * 4);
 898         sess->HBuf = NewStrBufPlain(NULL, SIZ / 4);
 899 }
 900
 901 void
 902 SessionDetachModule_WEBCIT
 903 (wcsession *sess)
 904 {
 905         DeleteHash(&sess->Directory);
 906
 907         FreeStrBuf(&sess->upload);
 908         sess->upload_length = 0;
 909
 910         FreeStrBuf(&sess->trailing_javascript);
 911
 912         if (StrLength(sess->WBuf) > SIZ * 30) /* Bigger than 120K? release. */
 913         {
 914                 FreeStrBuf(&sess->WBuf);
 915                 sess->WBuf = NewStrBuf();
 916         }
 917         else
 918                 FlushStrBuf(sess->WBuf);
 919         FlushStrBuf(sess->HBuf);
 920 }
 921
 922 void
 923 SessionDestroyModule_WEBCIT
 924 (wcsession *sess)
 925 {
 926         FreeStrBuf(&sess->WBuf);
 927         FreeStrBuf(&sess->HBuf);
 928         FreeStrBuf(&sess->ImportantMsg);
 929 }
 930