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         wprintf("<html><body>");
 245         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 246         wprintf("</body></html>\n");
 247         end_burst();
 248 }
 249
 250
 251
 252 /*
 253  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 254  */
 255 void http_transmit_thing(const char *content_type,
 256                          int is_static) {
 257
 258 #ifndef TECH_PREVIEW
 259         lprintf(9, "http_transmit_thing(%s)%s\n",
 260                 content_type,
 261                 ((is_static > 0) ? " (static)" : "")
 262         );
 263 #endif
 264         output_headers(0, 0, 0, 0, 0, is_static);
 265
 266         hprintf("Content-type: %s\r\n"
 267                 "Server: %s\r\n"
 268                 "Connection: close\r\n",
 269                 content_type,
 270                 PACKAGE_STRING);
 271
 272         end_burst();
 273 }
 274
 275 /*
 276  * print menu box like used in the floor view or admin interface.
 277  * This function takes pair of strings as va_args,
 278  * Title        Title string of the box
 279  * Class        CSS Class for the box
 280  * nLines       How many string pairs should we print? (URL, UrlText)
 281  * ...          Pairs of URL Strings and their Names
 282  */
 283 void print_menu_box(char* Title, char *Class, int nLines, ...)
 284 {
 285         va_list arg_list;
 286         long i;
 287
 288         svput("BOXTITLE", WCS_STRING, Title);
 289         do_template("beginboxx", NULL);
 290
 291         wprintf("<ul class=\"%s\">", Class);
 292
 293         va_start(arg_list, nLines);
 294         for (i = 0; i < nLines; ++i)
 295         {
 296                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 297                 wprintf((char *) va_arg(arg_list, char *));
 298                 wprintf("</a></li>\n");
 299         }
 300         va_end (arg_list);
 301
 302         wprintf("</a></li>\n");
 303
 304         wprintf("</ul>");
 305
 306         do_template("endbox", NULL);
 307 }
 308
 309
 310
 311 /*
 312  * Convenience functions to display a page containing only a string
 313  *
 314  * titlebarcolor        color of the titlebar of the frame
 315  * titlebarmsg          text to display in the title bar
 316  * messagetext          body of the box
 317  */
 318 void convenience_page(const char *titlebarcolor, const char *titlebarmsg, const char *messagetext)
 319 {
 320         hprintf("HTTP/1.1 200 OK\n");
 321         output_headers(1, 1, 2, 0, 0, 0);
 322         wprintf("<div id=\"banner\">\n");
 323         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 324         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 325         wprintf("</td></tr></table>\n");
 326         wprintf("</div>\n<div id=\"content\">\n");
 327         escputs(messagetext);
 328
 329         wprintf("<hr />\n");
 330         wDumpContent(1);
 331 }
 332
 333
 334 /*
 335  * Display a blank page.
 336  */
 337 void blank_page(void) {
 338         output_headers(1, 1, 0, 0, 0, 0);
 339         wDumpContent(2);
 340 }
 341
 342
 343 /*
 344  * A template has been requested
 345  */
 346 void url_do_template(void) {
 347         const StrBuf *MimeType;
 348         const StrBuf *Tmpl = sbstr("template");
 349         begin_burst();
 350         MimeType = DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 351         http_transmit_thing(ChrPtr(MimeType), 0);
 352 }
 353
 354
 355
 356 /*
 357  * convenience function to indicate success
 358  */
 359 void display_success(char *successmessage)
 360 {
 361         convenience_page("007700", "OK", successmessage);
 362 }
 363
 364
 365 /*
 366  * Authorization required page
 367  * This is probably temporary and should be revisited
 368  */
 369 void authorization_required(void)
 370 {
 371         wcsession *WCC = WC;
 372         const char *message = "";
 373
 374         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 375         hprintf(
 376                 "Server: %s / %s\r\n"
 377                 "Connection: close\r\n",
 378                 PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software)
 379         );
 380         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(WC->serv_info->serv_humannode));
 381         hprintf("Content-Type: text/html\r\n");
 382         wprintf("<h1>");
 383         wprintf(_("Authorization Required"));
 384         wprintf("</h1>\r\n");
 385
 386
 387         if (WCC->ImportantMsg != NULL)
 388                 message = ChrPtr(WCC->ImportantMsg);
 389         else if (WCC->ImportantMessage != NULL)
 390                 message = WCC->ImportantMessage;
 391
 392         wprintf(_("The resource you requested requires a valid username and password. "
 393                 "You could not be logged in: %s\n"), message);
 394         wDumpContent(0);
 395
 396 }
 397
 398 /*
 399  * Convenience functions to wrap around asynchronous ajax responses
 400  */
 401 void begin_ajax_response(void) {
 402         wcsession *WCC = WC;
 403
 404         FlushStrBuf(WCC->HBuf);
 405         output_headers(0, 0, 0, 0, 0, 0);
 406
 407         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 408                 "Server: %s\r\n"
 409                 "Connection: close\r\n"
 410                 ,
 411                 PACKAGE_STRING);
 412         begin_burst();
 413 }
 414
 415 /*
 416  * print ajax response footer
 417  */
 418 void end_ajax_response(void) {
 419         wDumpContent(0);
 420 }
 421
 422
 423
 424 /*
 425  * Wraps a Citadel server command in an AJAX transaction.
 426  */
 427 void ajax_servcmd(void)
 428 {
 429         wcsession *WCC = WC;
 430         int Done = 0;
 431         StrBuf *Buf;
 432         char *junk;
 433         size_t len;
 434
 435         begin_ajax_response();
 436         Buf = NewStrBuf();
 437         serv_puts(bstr("g_cmd"));
 438         StrBuf_ServGetln(Buf);
 439         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 440         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 441
 442         switch (GetServerStatus(Buf, NULL)) {
 443         case 8:
 444                 serv_puts("\n\n000");
 445                 if ( (StrLength(Buf)==3) &&
 446                      !strcmp(ChrPtr(Buf), "000")) {
 447                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\000"), 0);
 448                         break;
 449                 }
 450         case 1:
 451                 while (!Done) {
 452                         StrBuf_ServGetln(Buf);
 453                         if ( (StrLength(Buf)==3) &&
 454                              !strcmp(ChrPtr(Buf), "000")) {
 455                                 Done = 1;
 456                         }
 457                         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 458                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 459                 }
 460                 break;
 461         case 4:
 462                 text_to_server(bstr("g_input"));
 463                 serv_puts("000");
 464                 break;
 465         case 6:
 466                 len = atol(&ChrPtr(Buf)[4]);
 467                 StrBuf_ServGetBLOBBuffered(Buf, len);
 468                 break;
 469         case 7:
 470                 len = atol(&ChrPtr(Buf)[4]);
 471                 junk = malloc(len);
 472                 memset(junk, 0, len);
 473                 serv_write(junk, len);
 474                 free(junk);
 475         }
 476
 477         end_ajax_response();
 478
 479         /*
 480          * This is kind of an ugly hack, but this is the only place it can go.
 481          * If the command was GEXP, then the instant messenger window must be
 482          * running, so reset the "last_pager_check" watchdog timer so
 483          * that page_popup() doesn't try to open it a second time.
 484          */
 485         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 486                 WCC->last_pager_check = time(NULL);
 487         }
 488         FreeStrBuf(&Buf);
 489 }
 490
 491
 492 /*
 493  * Helper function for the asynchronous check to see if we need
 494  * to open the instant messenger window.
 495  */
 496 void seconds_since_last_gexp(void)
 497 {
 498         char buf[256];
 499
 500         if ( (time(NULL) - WC->last_pager_check) < 30) {
 501                 wprintf("NO\n");
 502         }
 503         else {
 504                 memset(buf, 0, 5);
 505                 serv_puts("NOOP");
 506                 serv_getln(buf, sizeof buf);
 507                 if (buf[3] == '*') {
 508                         wprintf("YES");
 509                 }
 510                 else {
 511                         wprintf("NO");
 512                 }
 513         }
 514 }
 515
 516
 517
 518 void ReadPostData(void)
 519 {
 520         const char *content_end = NULL;
 521         int body_start = 0;
 522         wcsession *WCC = WC;
 523         StrBuf *content = NULL;
 524
 525         content = NewStrBufPlain(NULL, WCC->Hdr->HR.ContentLength + 256);
 526
 527         StrBufPrintf(content,
 528                      "Content-type: %s\n"
 529                      "Content-length: %ld\n\n",
 530                      ChrPtr(WCC->Hdr->HR.ContentType),
 531                              WCC->Hdr->HR.ContentLength);
 532 /*
 533   hprintf("Content-type: %s\n"
 534   "Content-length: %d\n\n",
 535   ContentType, ContentLength);
 536 */
 537         body_start = StrLength(content);
 538
 539         /** Read the entire input data at once. */
 540         client_read_to(WCC->Hdr, content,
 541                        WCC->Hdr->HR.ContentLength,
 542                        SLEEPING);
 543
 544         if (!strncasecmp(ChrPtr(WCC->Hdr->HR.ContentType), "application/x-www-form-urlencoded", 33)) {
 545                 StrBufCutLeft(content, body_start);
 546                 ParseURLParams(content);
 547         } else if (!strncasecmp(ChrPtr(WCC->Hdr->HR.ContentType), "multipart", 9)) {
 548                 content_end = ChrPtr(content) +
 549                         WCC->Hdr->HR.ContentLength +
 550                         body_start;
 551                 mime_parser(ChrPtr(content), content_end, *upload_handler, NULL, NULL, NULL, 0);
 552         } else if (WCC->Hdr->HR.ContentLength > 0) {
 553                 WCC->upload = content;
 554                 content = NULL;
 555         }
 556         FreeStrBuf(&content);
 557 }
 558
 559
 560 /*
 561  * Entry point for WebCit transaction
 562  */
 563 void session_loop(void)
 564 {
 565         int Flags = 0;
 566         int xhttp;
 567         StrBuf *Buf;
 568
 569         /*
 570          * We stuff these with the values coming from the client cookies,
 571          * so we can use them to reconnect a timed out session if we have to.
 572          */
 573         wcsession *WCC;
 574
 575
 576         Buf = NewStrBuf();
 577
 578         WCC= WC;
 579
 580         WCC->upload_length = 0;
 581         WCC->upload = NULL;
 582         WCC->is_mobile = 0;
 583         WCC->trailing_javascript = NewStrBuf();
 584         WCC->Hdr->nWildfireHeaders = 0;
 585         if (WCC->Hdr->HR.Handler != NULL)
 586                 Flags = WCC->Hdr->HR.Handler->Flags; /* so we can temporarily add our own... */
 587
 588         if (WCC->Hdr->HR.ContentLength > 0) {
 589                 ReadPostData();
 590         }
 591
 592         /* If there are variables in the URL, we must grab them now */
 593         if (WCC->Hdr->PlainArgs != NULL)
 594                 ParseURLParams(WCC->Hdr->PlainArgs);
 595
 596         /* If the client sent a nonce that is incorrect, kill the request. */
 597         if (havebstr("nonce")) {
 598                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 599                         bstr("nonce"), WCC->nonce);
 600                 if (ibstr("nonce") != WCC->nonce) {
 601                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 602                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 603                         hprintf("Content-Type: text/plain\r\n\r\n");
 604                         wprintf("Security check failed.\r\n");
 605                         end_burst();
 606                         goto SKIP_ALL_THIS_CRAP;
 607                 }
 608         }
 609
 610         /*
 611          * If we're not connected to a Citadel server, try to hook up the
 612          * connection now.
 613          */
 614         if (!WCC->connected) {
 615                 if (GetConnected ())
 616                         goto SKIP_ALL_THIS_CRAP;
 617         }
 618
 619
 620         /*
 621          * If we're not logged in, but we have authentication data (either from
 622          * a cookie or from http-auth), try logging in to Citadel using that.
 623          */
 624         if ((!WCC->logged_in)
 625             && (StrLength(WCC->Hdr->c_username) > 0)
 626             && (StrLength(WCC->Hdr->c_password) > 0))
 627         {
 628                 FlushStrBuf(Buf);
 629                 serv_printf("USER %s", ChrPtr(WCC->Hdr->c_username));
 630                 StrBuf_ServGetln(Buf);
 631                 if (GetServerStatus(Buf, NULL) == 3) {
 632                         serv_printf("PASS %s", ChrPtr(WCC->Hdr->c_password));
 633                         StrBuf_ServGetln(Buf);
 634                         if (GetServerStatus(Buf, NULL) == 2) {
 635                                 become_logged_in(WCC->Hdr->c_username,
 636                                                  WCC->Hdr->c_password, Buf);
 637                         } else {
 638                                 /* Should only display when password is wrong */
 639                                 WCC->ImportantMsg = NewStrBufPlain(ChrPtr(Buf) + 4, StrLength(Buf) - 4);
 640                                 authorization_required();
 641                                 FreeStrBuf(&Buf);
 642                                 goto SKIP_ALL_THIS_CRAP;
 643                         }
 644                 }
 645         }
 646
 647         xhttp = (WCC->Hdr->HR.eReqType != eGET) &&
 648                 (WCC->Hdr->HR.eReqType != ePOST) &&
 649                 (WCC->Hdr->HR.eReqType != eHEAD);
 650
 651         /*
 652          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 653          * prior to doing anything else.
 654          */
 655         if (havebstr("gotofirst")) {
 656                 int ret;
 657                 ret = gotoroom(sbstr("gotofirst"));     /* do quietly to avoid session output! */
 658                 if ((ret/100) != 2) {
 659                         lprintf(1, "GOTOFIRST: Unable to change to [%s]; Reason: %d\n",
 660                                 bstr("gotofirst"), ret);
 661                 }
 662         }
 663
 664         /*
 665          * If we aren't in any room yet, but we have cookie data telling us where we're
 666          * supposed to be, and 'gotofirst' was not specified, then go there.
 667          */
 668         else if ( (StrLength(WCC->wc_roomname) == 0) && ( (StrLength(WCC->Hdr->c_roomname) > 0) )) {
 669                 int ret;
 670
 671                 lprintf(9, "We are in '%s' but cookie indicates '%s', going there...\n",
 672                         ChrPtr(WCC->wc_roomname),
 673                         ChrPtr(WCC->Hdr->c_roomname)
 674                 );
 675                 ret = gotoroom(WCC->Hdr->c_roomname);   /* do quietly to avoid session output! */
 676                 if ((ret/100) != 2) {
 677                         lprintf(1, "COOKIEGOTO: Unable to change to [%s]; Reason: %d\n",
 678                                 ChrPtr(WCC->Hdr->c_roomname), ret);
 679                 }
 680         }
 681
 682         if (WCC->Hdr->HR.Handler != NULL) {
 683                 if (!WCC->logged_in && ((WCC->Hdr->HR.Handler->Flags & ANONYMOUS) == 0)) {
 684                         display_login(NULL);
 685                 }
 686                 else {
 687                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 688                                 begin_ajax_response();
 689                         WCC->Hdr->HR.Handler->F();
 690                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 691                                 end_ajax_response();
 692                 }
 693         }
 694         /* When all else fais, display the main menu. */
 695         else {
 696                 /*
 697                  * ordinary browser users get a nice login screen, DAV etc. requsets
 698                  * are given a 401 so they can handle it appropriate.
 699                  */
 700                 if (!WCC->logged_in)  {
 701                         if (xhttp)
 702                                 authorization_required();
 703                         else
 704                                 display_login(NULL);
 705                 }
 706                 /*
 707                  * Toplevel dav requests? or just a flat browser request?
 708                  */
 709                 else {
 710                         if (xhttp)
 711                                 groupdav_main();
 712                         else
 713                                 display_main_menu();
 714                 }
 715         }
 716
 717 SKIP_ALL_THIS_CRAP:
 718         FreeStrBuf(&Buf);
 719         fflush(stdout);
 720 }
 721
 722
 723 /*
 724  * Replacement for sleep() that uses select() in order to avoid SIGALRM
 725  */
 726 void sleeeeeeeeeep(int seconds)
 727 {
 728         struct timeval tv;
 729
 730         tv.tv_sec = seconds;
 731         tv.tv_usec = 0;
 732         select(0, NULL, NULL, NULL, &tv);
 733 }
 734
 735
 736 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
 737 {
 738         wcsession *WCC = WC;
 739         if (WCC != NULL)
 740                 return ((!IsEmptyStr(WCC->ImportantMessage)) ||
 741                         (StrLength(WCC->ImportantMsg) > 0));
 742         else
 743                 return 0;
 744 }
 745
 746 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
 747 {
 748         wcsession *WCC = WC;
 749
 750         if (WCC != NULL) {
 751                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 752                         StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
 753                         WCC->ImportantMessage[0] = '\0';
 754                 }
 755                 else if (StrLength(WCC->ImportantMsg) > 0) {
 756                         StrEscAppend(Target, WCC->ImportantMsg, NULL, 0, 0);
 757                         FlushStrBuf(WCC->ImportantMsg);
 758                 }
 759         }
 760 }
 761
 762 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
 763 {
 764         wcsession *WCC = WC;
 765
 766         if (WCC != NULL)
 767                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
 768 }
 769
 770 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
 771 {
 772         StrBufAppendBuf(Target,
 773                         csslocal, 0);
 774 }
 775
 776 extern char static_local_dir[PATH_MAX];
 777
 778
 779 void
 780 InitModule_WEBCIT
 781 (void)
 782 {
 783         char dir[SIZ];
 784         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 785         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
 786         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX|LOGCHATTY);
 787         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
 788         WebcitAddUrlHandler(HKEY("webcit"), blank_page, URLNAMESPACE);
 789
 790         WebcitAddUrlHandler(HKEY("401"), authorization_required, ANONYMOUS|COOKIEUNNEEDED);
 791         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
 792         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, CTX_NONE);
 793         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
 794         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, CTX_NONE);
 795
 796         snprintf(dir, SIZ, "%s/static.local/webcit.css", static_local_dir);
 797         if (!access(dir, R_OK)) {
 798                 lprintf(9, "Using local Stylesheet [%s]\n", dir);
 799                 csslocal = NewStrBufPlain(HKEY("<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\">"));
 800         }
 801         else
 802                 lprintf(9, "Didn't find site local Stylesheet [%s]\n", dir);
 803
 804 }
 805
 806 void
 807 ServerStartModule_WEBCIT
 808 (void)
 809 {
 810         HandlerHash = NewHash(1, NULL);
 811 }
 812
 813
 814 void
 815 ServerShutdownModule_WEBCIT
 816 (void)
 817 {
 818         FreeStrBuf(&csslocal);
 819         DeleteHash(&HandlerHash);
 820 }
 821
 822
 823
 824 void
 825 SessionNewModule_WEBCIT
 826 (wcsession *sess)
 827 {
 828         sess->ImportantMsg = NewStrBuf();
 829         sess->WBuf = NewStrBufPlain(NULL, SIZ * 4);
 830         sess->HBuf = NewStrBufPlain(NULL, SIZ / 4);
 831 }
 832
 833 void
 834 SessionDetachModule_WEBCIT
 835 (wcsession *sess)
 836 {
 837         DeleteHash(&sess->Hdr->urlstrings);// TODO?
 838         if (sess->upload_length > 0) {
 839                 FreeStrBuf(&sess->upload);
 840                 sess->upload_length = 0;
 841         }
 842         FreeStrBuf(&sess->trailing_javascript);
 843
 844         if (StrLength(sess->WBuf) > SIZ * 30) /* Bigger than 120K? release. */
 845         {
 846                 FreeStrBuf(&sess->WBuf);
 847                 sess->WBuf = NewStrBuf();
 848         }
 849         else
 850                 FlushStrBuf(sess->WBuf);
 851         FlushStrBuf(sess->HBuf);
 852 }
 853
 854 void
 855 SessionDestroyModule_WEBCIT
 856 (wcsession *sess)
 857 {
 858         FreeStrBuf(&sess->WBuf);
 859         FreeStrBuf(&sess->HBuf);
 860         FreeStrBuf(&sess->ImportantMsg);
 861 }
 862