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