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("paging"), NULL, &NoCtx);
 213                 }
 214
 215                 if (do_room_banner == 1) {
 216                         wprintf("<div id=\"banner\">\n");
 217                         embed_room_banner(NULL, navbar_default);
 218                         wprintf("</div>\n");
 219                 }
 220         }
 221
 222         if (do_room_banner == 1) {
 223                 wprintf("<div id=\"content\">\n");
 224         }
 225 }
 226
 227 void output_custom_content_header(const char *ctype) {
 228   hprintf("HTTP/1.1 200 OK\r\n");
 229   hprintf("Content-type: %s; charset=utf-8\r\n",ctype);
 230   hprintf("Server: %s / %s\r\n", PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software));
 231   hprintf("Connection: close\r\n");
 232 }
 233
 234
 235 /*
 236  * Generic function to do an HTTP redirect.  Easy and fun.
 237  */
 238 void http_redirect(const char *whichpage) {
 239         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 240         hprintf("Location: %s\r\n", whichpage);
 241         hprintf("URI: %s\r\n", whichpage);
 242         hprintf("Content-type: text/html; charset=utf-8\r\n");
 243         begin_burst();
 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 /*
 277  * Convenience functions to display a page containing only a string
 278  *
 279  * titlebarcolor        color of the titlebar of the frame
 280  * titlebarmsg          text to display in the title bar
 281  * messagetext          body of the box
 282  */
 283 void convenience_page(const char *titlebarcolor, const char *titlebarmsg, const char *messagetext)
 284 {
 285         hprintf("HTTP/1.1 200 OK\n");
 286         output_headers(1, 1, 2, 0, 0, 0);
 287         wprintf("<div id=\"banner\">\n");
 288         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 289         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 290         wprintf("</td></tr></table>\n");
 291         wprintf("</div>\n<div id=\"content\">\n");
 292         escputs(messagetext);
 293
 294         wprintf("<hr />\n");
 295         wDumpContent(1);
 296 }
 297
 298
 299 /*
 300  * Display a blank page.
 301  */
 302 void blank_page(void) {
 303         output_headers(1, 1, 0, 0, 0, 0);
 304         wDumpContent(2);
 305 }
 306
 307
 308 /*
 309  * A template has been requested
 310  */
 311 void url_do_template(void) {
 312         const StrBuf *MimeType;
 313         const StrBuf *Tmpl = sbstr("template");
 314         begin_burst();
 315         MimeType = DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 316         http_transmit_thing(ChrPtr(MimeType), 0);
 317 }
 318
 319
 320
 321 /*
 322  * convenience function to indicate success
 323  */
 324 void display_success(char *successmessage)
 325 {
 326         convenience_page("007700", "OK", successmessage);
 327 }
 328
 329
 330 /*
 331  * Authorization required page
 332  * This is probably temporary and should be revisited
 333  */
 334 void authorization_required(void)
 335 {
 336         wcsession *WCC = WC;
 337         const char *message = "";
 338
 339         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 340         hprintf(
 341                 "Server: %s / %s\r\n"
 342                 "Connection: close\r\n",
 343                 PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software)
 344         );
 345         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(WC->serv_info->serv_humannode));
 346         hprintf("Content-Type: text/html\r\n");
 347         begin_burst();
 348         wprintf("<h1>");
 349         wprintf(_("Authorization Required"));
 350         wprintf("</h1>\r\n");
 351
 352
 353         if (WCC->ImportantMsg != NULL)
 354                 message = ChrPtr(WCC->ImportantMsg);
 355         else if (WCC->ImportantMessage != NULL)
 356                 message = WCC->ImportantMessage;
 357
 358         wprintf(_("The resource you requested requires a valid username and password. "
 359                 "You could not be logged in: %s\n"), message);
 360         wDumpContent(0);
 361         end_webcit_session();
 362 }
 363
 364 /*
 365  * Convenience functions to wrap around asynchronous ajax responses
 366  */
 367 void begin_ajax_response(void) {
 368         wcsession *WCC = WC;
 369
 370         FlushStrBuf(WCC->HBuf);
 371         output_headers(0, 0, 0, 0, 0, 0);
 372
 373         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 374                 "Server: %s\r\n"
 375                 "Connection: close\r\n"
 376                 ,
 377                 PACKAGE_STRING);
 378         begin_burst();
 379 }
 380
 381 /*
 382  * print ajax response footer
 383  */
 384 void end_ajax_response(void) {
 385         wDumpContent(0);
 386 }
 387
 388
 389
 390 /*
 391  * Wraps a Citadel server command in an AJAX transaction.
 392  */
 393 void ajax_servcmd(void)
 394 {
 395         wcsession *WCC = WC;
 396         int Done = 0;
 397         StrBuf *Buf;
 398         char *junk;
 399         size_t len;
 400
 401         begin_ajax_response();
 402         Buf = NewStrBuf();
 403         serv_puts(bstr("g_cmd"));
 404         StrBuf_ServGetln(Buf);
 405         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 406         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 407
 408         switch (GetServerStatus(Buf, NULL)) {
 409         case 8:
 410                 serv_puts("\n\n000");
 411                 if ( (StrLength(Buf)==3) &&
 412                      !strcmp(ChrPtr(Buf), "000")) {
 413                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\000"), 0);
 414                         break;
 415                 }
 416         case 1:
 417                 while (!Done) {
 418                         StrBuf_ServGetln(Buf);
 419                         if ( (StrLength(Buf)==3) &&
 420                              !strcmp(ChrPtr(Buf), "000")) {
 421                                 Done = 1;
 422                         }
 423                         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 424                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 425                 }
 426                 break;
 427         case 4:
 428                 text_to_server(bstr("g_input"));
 429                 serv_puts("000");
 430                 break;
 431         case 6:
 432                 len = atol(&ChrPtr(Buf)[4]);
 433                 StrBuf_ServGetBLOBBuffered(Buf, len);
 434                 break;
 435         case 7:
 436                 len = atol(&ChrPtr(Buf)[4]);
 437                 junk = malloc(len);
 438                 memset(junk, 0, len);
 439                 serv_write(junk, len);
 440                 free(junk);
 441         }
 442
 443         end_ajax_response();
 444
 445         /*
 446          * This is kind of an ugly hack, but this is the only place it can go.
 447          * If the command was GEXP, then the instant messenger window must be
 448          * running, so reset the "last_pager_check" watchdog timer so
 449          * that page_popup() doesn't try to open it a second time.
 450          */
 451         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 452                 WCC->last_pager_check = time(NULL);
 453         }
 454         FreeStrBuf(&Buf);
 455 }
 456
 457
 458 /*
 459  * Helper function for the asynchronous check to see if we need
 460  * to open the instant messenger window.
 461  */
 462 void seconds_since_last_gexp(void)
 463 {
 464         char buf[256];
 465
 466         if ( (time(NULL) - WC->last_pager_check) < 30) {
 467                 wprintf("NO\n");
 468         }
 469         else {
 470                 memset(buf, 0, 5);
 471                 serv_puts("NOOP");
 472                 serv_getln(buf, sizeof buf);
 473                 if (buf[3] == '*') {
 474                         wprintf("YES");
 475                 }
 476                 else {
 477                         wprintf("NO");
 478                 }
 479         }
 480 }
 481
 482
 483
 484 void ReadPostData(void)
 485 {
 486         int body_start = 0;
 487         wcsession *WCC = WC;
 488         StrBuf *content = NULL;
 489
 490         content = NewStrBufPlain(NULL, WCC->Hdr->HR.ContentLength + 256);
 491
 492         StrBufPrintf(content,
 493                      "Content-type: %s\n"
 494                      "Content-length: %ld\n\n",
 495                      ChrPtr(WCC->Hdr->HR.ContentType),
 496                              WCC->Hdr->HR.ContentLength);
 497 /*
 498   hprintf("Content-type: %s\n"
 499   "Content-length: %d\n\n",
 500   ContentType, ContentLength);
 501 */
 502         body_start = StrLength(content);
 503
 504         /** Read the entire input data at once. */
 505         client_read_to(WCC->Hdr, content,
 506                        WCC->Hdr->HR.ContentLength,
 507                        SLEEPING);
 508
 509         if (!strncasecmp(ChrPtr(WCC->Hdr->HR.ContentType), "application/x-www-form-urlencoded", 33)) {
 510                 StrBufCutLeft(content, body_start);
 511                 ParseURLParams(content);
 512         } else if (!strncasecmp(ChrPtr(WCC->Hdr->HR.ContentType), "multipart", 9)) {
 513                 char *Buf;
 514                 char *BufEnd;
 515                 long len;
 516
 517                 len = StrLength(content);
 518                 Buf = SmashStrBuf(&content);
 519                 BufEnd = Buf + len;
 520                 mime_parser(Buf, BufEnd, *upload_handler, NULL, NULL, NULL, 0);
 521                 free(Buf);
 522         } else if (WCC->Hdr->HR.ContentLength > 0) {
 523                 WCC->upload = content;
 524                 content = NULL;
 525         }
 526         FreeStrBuf(&content);
 527 }
 528
 529
 530 void ParseREST_URL(void)
 531 {
 532         StrBuf *Buf;
 533         wcsession *WCC = WC;
 534         long i = 0;
 535         const char *pCh = NULL;
 536
 537         WCC->Directory = NewHash(1, Flathash);
 538
 539         Buf = NewStrBuf();
 540         while (StrBufExtract_NextToken(WCC->Hdr->HR.ReqLine,
 541                                        Buf, &pCh,  '/') >= 0)
 542         {
 543                 Put(WCC->Directory, IKEY(i), Buf, HFreeStrBuf);
 544                 i++;
 545                 Buf = NewStrBuf();
 546         }
 547         if (i == 0)
 548                 FreeStrBuf(&Buf);
 549 }
 550
 551
 552
 553
 554 /*
 555  * Entry point for WebCit transaction
 556  */
 557 void session_loop(void)
 558 {
 559         int Flags = 0;
 560         int xhttp;
 561         StrBuf *Buf;
 562
 563         /*
 564          * We stuff these with the values coming from the client cookies,
 565          * so we can use them to reconnect a timed out session if we have to.
 566          */
 567         wcsession *WCC;
 568
 569
 570         Buf = NewStrBuf();
 571
 572         WCC= WC;
 573
 574         WCC->upload_length = 0;
 575         WCC->upload = NULL;
 576         WCC->is_mobile = 0;
 577         WCC->trailing_javascript = NewStrBuf();
 578         WCC->Hdr->nWildfireHeaders = 0;
 579         if (WCC->Hdr->HR.Handler != NULL)
 580                 Flags = WCC->Hdr->HR.Handler->Flags; /* so we can temporarily add our own... */
 581
 582         if (WCC->Hdr->HR.ContentLength > 0) {
 583                 ReadPostData();
 584         }
 585
 586         /* If there are variables in the URL, we must grab them now */
 587         if (WCC->Hdr->PlainArgs != NULL)
 588                 ParseURLParams(WCC->Hdr->PlainArgs);
 589
 590         /* If the client sent a nonce that is incorrect, kill the request. */
 591         if (havebstr("nonce")) {
 592                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 593                         bstr("nonce"), WCC->nonce);
 594                 if (ibstr("nonce") != WCC->nonce) {
 595                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 596                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 597                         hprintf("Content-Type: text/plain\r\n\r\n");
 598                         begin_burst();
 599                         wprintf("Security check failed.\r\n");
 600                         end_burst();
 601                         goto SKIP_ALL_THIS_CRAP;
 602                 }
 603         }
 604
 605         /*
 606          * If we're not connected to a Citadel server, try to hook up the
 607          * connection now.
 608          */
 609         if (!WCC->connected) {
 610                 if (GetConnected ())
 611                         goto SKIP_ALL_THIS_CRAP;
 612         }
 613
 614
 615         /*
 616          * If we're not logged in, but we have authentication data (either from
 617          * a cookie or from http-auth), try logging in to Citadel using that.
 618          */
 619         if ((!WCC->logged_in)
 620             && (StrLength(WCC->Hdr->c_username) > 0)
 621             && (StrLength(WCC->Hdr->c_password) > 0))
 622         {
 623                 FlushStrBuf(Buf);
 624                 serv_printf("USER %s", ChrPtr(WCC->Hdr->c_username));
 625                 StrBuf_ServGetln(Buf);
 626                 if (GetServerStatus(Buf, NULL) == 3) {
 627                         serv_printf("PASS %s", ChrPtr(WCC->Hdr->c_password));
 628                         StrBuf_ServGetln(Buf);
 629                         if (GetServerStatus(Buf, NULL) == 2) {
 630                                 become_logged_in(WCC->Hdr->c_username,
 631                                                  WCC->Hdr->c_password, Buf);
 632                         } else {
 633                                 /* Should only display when password is wrong */
 634                                 WCC->ImportantMsg = NewStrBufPlain(ChrPtr(Buf) + 4, StrLength(Buf) - 4);
 635                                 authorization_required();
 636                                 FreeStrBuf(&Buf);
 637                                 goto SKIP_ALL_THIS_CRAP;
 638                         }
 639                 }
 640         }
 641
 642         xhttp = (WCC->Hdr->HR.eReqType != eGET) &&
 643                 (WCC->Hdr->HR.eReqType != ePOST) &&
 644                 (WCC->Hdr->HR.eReqType != eHEAD);
 645
 646         /*
 647          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 648          * prior to doing anything else.
 649          */
 650         if (havebstr("gotofirst")) {
 651                 int ret;
 652                 ret = gotoroom(sbstr("gotofirst"));     /* do quietly to avoid session output! */
 653                 if ((ret/100) != 2) {
 654                         lprintf(1, "GOTOFIRST: Unable to change to [%s]; Reason: %d\n",
 655                                 bstr("gotofirst"), ret);
 656                 }
 657         }
 658
 659         /*
 660          * If we aren't in any room yet, but we have cookie data telling us where we're
 661          * supposed to be, and 'gotofirst' was not specified, then go there.
 662          */
 663         else if ( (StrLength(WCC->wc_roomname) == 0) && ( (StrLength(WCC->Hdr->c_roomname) > 0) )) {
 664                 int ret;
 665
 666                 lprintf(9, "We are in '%s' but cookie indicates '%s', going there...\n",
 667                         ChrPtr(WCC->wc_roomname),
 668                         ChrPtr(WCC->Hdr->c_roomname)
 669                 );
 670                 ret = gotoroom(WCC->Hdr->c_roomname);   /* do quietly to avoid session output! */
 671                 if ((ret/100) != 2) {
 672                         lprintf(1, "COOKIEGOTO: Unable to change to [%s]; Reason: %d\n",
 673                                 ChrPtr(WCC->Hdr->c_roomname), ret);
 674                 }
 675         }
 676
 677         if (WCC->Hdr->HR.Handler != NULL) {
 678                 if (!WCC->logged_in && ((WCC->Hdr->HR.Handler->Flags & ANONYMOUS) == 0)) {
 679                         display_login(NULL);
 680                 }
 681                 else {
 682 /*
 683                         if ((WCC->Hdr->HR.Handler->Flags & PARSE_REST_URL) != 0)
 684                                 ParseREST_URL();
 685 */
 686                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 687                                 begin_ajax_response();
 688                         WCC->Hdr->HR.Handler->F();
 689                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 690                                 end_ajax_response();
 691                 }
 692         }
 693         /* When all else fais, display the main menu. */
 694         else {
 695                 /*
 696                  * ordinary browser users get a nice login screen, DAV etc. requsets
 697                  * are given a 401 so they can handle it appropriate.
 698                  */
 699                 if (!WCC->logged_in)  {
 700                         if (xhttp)
 701                                 authorization_required();
 702                         else
 703                                 display_login(NULL);
 704                 }
 705                 /*
 706                  * Toplevel dav requests? or just a flat browser request?
 707                  */
 708                 else {
 709                         if (xhttp)
 710                                 groupdav_main();
 711                         else
 712                                 display_main_menu();
 713                 }
 714         }
 715
 716 SKIP_ALL_THIS_CRAP:
 717         FreeStrBuf(&Buf);
 718         fflush(stdout);
 719 }
 720
 721
 722 /*
 723  * Replacement for sleep() that uses select() in order to avoid SIGALRM
 724  */
 725 void sleeeeeeeeeep(int seconds)
 726 {
 727         struct timeval tv;
 728
 729         tv.tv_sec = seconds;
 730         tv.tv_usec = 0;
 731         select(0, NULL, NULL, NULL, &tv);
 732 }
 733
 734
 735 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
 736 {
 737         wcsession *WCC = WC;
 738         if (WCC != NULL)
 739                 return ((!IsEmptyStr(WCC->ImportantMessage)) ||
 740                         (StrLength(WCC->ImportantMsg) > 0));
 741         else
 742                 return 0;
 743 }
 744
 745 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
 746 {
 747         wcsession *WCC = WC;
 748
 749         if (WCC != NULL) {
 750                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 751                         StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
 752                         WCC->ImportantMessage[0] = '\0';
 753                 }
 754                 else if (StrLength(WCC->ImportantMsg) > 0) {
 755                         StrEscAppend(Target, WCC->ImportantMsg, NULL, 0, 0);
 756                         FlushStrBuf(WCC->ImportantMsg);
 757                 }
 758         }
 759 }
 760
 761 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
 762 {
 763         wcsession *WCC = WC;
 764
 765         if (WCC != NULL)
 766                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
 767 }
 768
 769 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
 770 {
 771         StrBufAppendBuf(Target,
 772                         csslocal, 0);
 773 }
 774
 775 extern char static_local_dir[PATH_MAX];
 776
 777
 778 void
 779 InitModule_WEBCIT
 780 (void)
 781 {
 782         char dir[SIZ];
 783         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 784         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
 785         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX|LOGCHATTY);
 786         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
 787         WebcitAddUrlHandler(HKEY("webcit"), blank_page, URLNAMESPACE);
 788
 789         WebcitAddUrlHandler(HKEY("401"), authorization_required, ANONYMOUS|COOKIEUNNEEDED);
 790         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
 791         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, CTX_NONE);
 792         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
 793         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, CTX_NONE);
 794
 795         snprintf(dir, SIZ, "%s/webcit.css", static_local_dir);
 796         if (!access(dir, R_OK)) {
 797                 lprintf(9, "Using local Stylesheet [%s]\n", dir);
 798                 csslocal = NewStrBufPlain(HKEY("<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\">"));
 799         }
 800         else
 801                 lprintf(9, "No Site-local Stylesheet [%s] installed. \n", dir);
 802
 803 }
 804
 805 void
 806 ServerStartModule_WEBCIT
 807 (void)
 808 {
 809         HandlerHash = NewHash(1, NULL);
 810 }
 811
 812
 813 void
 814 ServerShutdownModule_WEBCIT
 815 (void)
 816 {
 817         FreeStrBuf(&csslocal);
 818         DeleteHash(&HandlerHash);
 819 }
 820
 821
 822
 823 void
 824 SessionNewModule_WEBCIT
 825 (wcsession *sess)
 826 {
 827         sess->ImportantMsg = NewStrBuf();
 828         sess->WBuf = NewStrBufPlain(NULL, SIZ * 4);
 829         sess->HBuf = NewStrBufPlain(NULL, SIZ / 4);
 830 }
 831
 832 void
 833 SessionDetachModule_WEBCIT
 834 (wcsession *sess)
 835 {
 836         DeleteHash(&sess->Hdr->urlstrings);// TODO?
 837         if (sess->upload_length > 0) {
 838                 FreeStrBuf(&sess->upload);
 839                 sess->upload_length = 0;
 840         }
 841         FreeStrBuf(&sess->trailing_javascript);
 842
 843         if (StrLength(sess->WBuf) > SIZ * 30) /* Bigger than 120K? release. */
 844         {
 845                 FreeStrBuf(&sess->WBuf);
 846                 sess->WBuf = NewStrBuf();
 847         }
 848         else
 849                 FlushStrBuf(sess->WBuf);
 850         FlushStrBuf(sess->HBuf);
 851 }
 852
 853 void
 854 SessionDestroyModule_WEBCIT
 855 (wcsession *sess)
 856 {
 857         FreeStrBuf(&sess->WBuf);
 858         FreeStrBuf(&sess->HBuf);
 859         FreeStrBuf(&sess->ImportantMsg);
 860 }
 861