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