webcit/webcit.c

   1 /*
   2  * $Id$
   3  *
   4  * This is the main transaction loop of the web service.  It maintains a
   5  * persistent session to the Citadel server, handling HTTP WebCit requests as
   6  * they arrive and presenting a user interface.
   7  */
   8 #define SHOW_ME_VAPPEND_PRINTF
   9 #include <stdio.h>
  10 #include <stdarg.h>
  11 #include "webcit.h"
  12 #include "groupdav.h"
  13 #include "webserver.h"
  14
  15
  16 StrBuf *csslocal = NULL;
  17 HashList *HandlerHash = NULL;
  18
  19
  20 void DeleteWebcitHandler(void *vHandler)
  21 {
  22         WebcitHandler *Handler = (WebcitHandler*) vHandler;
  23         FreeStrBuf(&Handler->Name);
  24         FreeStrBuf(&Handler->DisplayName);
  25         free (Handler);
  26 }
  27
  28 void WebcitAddUrlHandler(const char * UrlString, long UrlSLen,
  29                          const char *DisplayName, long dslen,
  30                          WebcitHandlerFunc F,
  31                          long Flags)
  32 {
  33         WebcitHandler *NewHandler;
  34         NewHandler = (WebcitHandler*) malloc(sizeof(WebcitHandler));
  35         NewHandler->F = F;
  36         NewHandler->Flags = Flags;
  37         NewHandler->Name = NewStrBufPlain(UrlString, UrlSLen);
  38         StrBufShrinkToFit(NewHandler->Name, 1);
  39         NewHandler->DisplayName = NewStrBufPlain(DisplayName, dslen);
  40         StrBufShrinkToFit(NewHandler->DisplayName, 1);
  41         Put(HandlerHash, UrlString, UrlSLen, NewHandler, DeleteWebcitHandler);
  42 }
  43
  44 void tmplput_HANDLER_DISPLAYNAME(StrBuf *Target, WCTemplputParams *TP)
  45 {
  46         wcsession *WCC = WC;
  47         if (WCC->Hdr->HR.Handler != NULL)
  48                 StrBufAppendTemplate(Target, TP, WCC->Hdr->HR.Handler->DisplayName, 0);
  49 }
  50
  51 void tmplput_HOST_DISPLAYNAME(StrBuf *Target, WCTemplputParams *TP)
  52 {
  53         wcsession *WCC = WC;
  54         StrBufAppendTemplate(Target, TP, WCC->Hdr->HR.http_host, 0);
  55 }
  56
  57 /*
  58  * web-printing funcion. uses our vsnprintf wrapper
  59  */
  60 #ifdef UBER_VERBOSE_DEBUGGING
  61 void wcc_printf(const char *FILE, const char *FUNCTION, long LINE, const char *format,...)
  62 #else
  63 void wc_printf(const char *format,...)
  64 #endif
  65 {
  66         wcsession *WCC = WC;
  67         va_list arg_ptr;
  68
  69         if (WCC->WBuf == NULL)
  70                 WCC->WBuf = NewStrBuf();
  71 #ifdef UBER_VERBOSE_DEBUGGING
  72         StrBufAppendPrintf(WCC->WBuf, "\n%s:%s:%d[", FILE, FUNCTION, LINE);
  73 #endif
  74
  75         va_start(arg_ptr, format);
  76         StrBufVAppendPrintf(WCC->WBuf, format, arg_ptr);
  77         va_end(arg_ptr);
  78 #ifdef UBER_VERBOSE_DEBUGGING
  79         StrBufAppendPrintf(WCC->WBuf, "]\n");
  80 #endif
  81 }
  82
  83 /*
  84  * http-header-printing funcion. uses our vsnprintf wrapper
  85  */
  86 void hprintf(const char *format,...)
  87 {
  88         wcsession *WCC = WC;
  89         va_list arg_ptr;
  90
  91         va_start(arg_ptr, format);
  92         StrBufVAppendPrintf(WCC->HBuf, format, arg_ptr);
  93         va_end(arg_ptr);
  94 }
  95
  96
  97
  98 /*
  99  * wrap up an HTTP session, closes tags, etc.
 100  *
 101  * print_standard_html_footer should be set to:
 102  * 0            - to transmit only,
 103  * nonzero      - to append the closing tags
 104  */
 105 void wDumpContent(int print_standard_html_footer)
 106 {
 107         if (print_standard_html_footer) {
 108                 wc_printf("</div> <!-- end of 'content' div -->\n");
 109                 do_template("trailing", NULL);
 110         }
 111
 112         /* If we've been saving it all up for one big output burst,
 113          * go ahead and do that now.
 114          */
 115         end_burst();
 116 }
 117
 118
 119
 120
 121 /*
 122  * Output HTTP headers and leading HTML for a page
 123  */
 124 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 125                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 126
 127                         int do_room_banner,     /* 0=no, 1=yes,
 128                                                  * 2 = I'm going to embed my own, so don't open the
 129                                                  *     <div id="content"> either.
 130                                                  */
 131
 132                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 133                         int suppress_check,     /* 1 = suppress check for instant messages          */
 134                         int cache               /* 1 = allow browser to cache this page             */
 135 ) {
 136         wcsession *WCC = WC;
 137         char httpnow[128];
 138
 139         hprintf("HTTP/1.1 200 OK\n");
 140         http_datestring(httpnow, sizeof httpnow, time(NULL));
 141
 142         if (do_httpheaders) {
 143                 if (WCC->serv_info != NULL)
 144                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 145                                 "Server: %s / %s\n"
 146                                 "Connection: close\r\n",
 147                                 PACKAGE_STRING,
 148                                 ChrPtr(WCC->serv_info->serv_software));
 149                 else
 150                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 151                                 "Server: %s / [n/a]\n"
 152                                 "Connection: close\r\n",
 153                                 PACKAGE_STRING);
 154         }
 155
 156         if (cache > 0) {
 157                 char httpTomorow[128];
 158
 159                 http_datestring(httpTomorow, sizeof httpTomorow,
 160                                 time(NULL) + 60 * 60 * 24 * 2);
 161
 162                 hprintf("Pragma: public\r\n"
 163                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 164                         "Last-modified: %s\r\n"
 165                         "Expires: %s\r\n",
 166                         httpnow,
 167                         httpTomorow
 168                 );
 169         }
 170         else {
 171                 hprintf("Pragma: no-cache\r\n"
 172                         "Cache-Control: no-store\r\n"
 173                         "Expires: -1\r\n"
 174                 );
 175         }
 176
 177         if (cache < 2) stuff_to_cookie(unset_cookies);
 178
 179         if (do_htmlhead) {
 180                 begin_burst();
 181                 do_template("head", NULL);
 182
 183                 /* check for ImportantMessages (these display in a div overlaying the main screen) */
 184                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 185                         wc_printf("<div id=\"important_message\">\n"
 186                                 "<span class=\"imsg\">");
 187                         StrEscAppend(WCC->WBuf, NULL, WCC->ImportantMessage, 0, 0);
 188                         wc_printf("</span><br />\n"
 189                                 "</div>\n"
 190                         );
 191                         StrBufAppendBufPlain(WCC->trailing_javascript,
 192                                              HKEY("setTimeout('hide_imsg_popup()', 5000);       \n"),
 193                                              0
 194                         );
 195                         WCC->ImportantMessage[0] = 0;
 196                 }
 197                 else if (StrLength(WCC->ImportantMsg) > 0) {
 198                         wc_printf("<div id=\"important_message\">\n"
 199                                 "<span class=\"imsg\">");
 200                         StrEscAppend(WCC->WBuf, WCC->ImportantMsg, NULL, 0, 0);
 201                         wc_printf("</span><br />\n"
 202                                 "</div>\n"
 203                         );
 204                         StrBufAppendBufPlain(WCC->trailing_javascript,
 205                                              HKEY("setTimeout('hide_imsg_popup()', 5000);       \n"),
 206                                              0
 207                         );
 208                         FlushStrBuf(WCC->ImportantMsg);
 209                 }
 210                 if ( (WCC->logged_in) && (!unset_cookies) ) {
 211                         DoTemplate(HKEY("paging"), NULL, &NoCtx);
 212                 }
 213
 214                 if (do_room_banner == 1) {
 215                         wc_printf("<div id=\"banner\">\n");
 216                         embed_room_banner();
 217                         wc_printf("</div>\n");
 218                 }
 219         }
 220
 221         if (do_room_banner == 1) {
 222                 wc_printf("<div id=\"content\">\n");
 223         }
 224 }
 225
 226 void output_custom_content_header(const char *ctype) {
 227   hprintf("HTTP/1.1 200 OK\r\n");
 228   hprintf("Content-type: %s; charset=utf-8\r\n",ctype);
 229   hprintf("Server: %s / %s\r\n", PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software));
 230   hprintf("Connection: close\r\n");
 231 }
 232
 233
 234 /*
 235  * Generic function to do an HTTP redirect.  Easy and fun.
 236  */
 237 void http_redirect(const char *whichpage) {
 238         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 239         hprintf("Location: %s\r\n", whichpage);
 240         hprintf("URI: %s\r\n", whichpage);
 241         hprintf("Content-type: text/html; charset=utf-8\r\n");
 242         begin_burst();
 243         wc_printf("<html><body>");
 244         wc_printf("Go <a href=\"%s\">here</A>.", whichpage);
 245         wc_printf("</body></html>\n");
 246         end_burst();
 247 }
 248
 249
 250
 251 /*
 252  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 253  */
 254 void http_transmit_thing(const char *content_type,
 255                          int is_static) {
 256
 257 #ifndef TECH_PREVIEW
 258         lprintf(9, "http_transmit_thing(%s)%s\n",
 259                 content_type,
 260                 ((is_static > 0) ? " (static)" : "")
 261         );
 262 #endif
 263         output_headers(0, 0, 0, 0, 0, is_static);
 264
 265         hprintf("Content-type: %s\r\n"
 266                 "Server: %s\r\n"
 267                 "Connection: close\r\n",
 268                 content_type,
 269                 PACKAGE_STRING);
 270
 271         end_burst();
 272 }
 273
 274
 275 /*
 276  * Convenience functions to display a page containing only a string
 277  *
 278  * titlebarcolor        color of the titlebar of the frame
 279  * titlebarmsg          text to display in the title bar
 280  * messagetext          body of the box
 281  */
 282 void convenience_page(const char *titlebarcolor, const char *titlebarmsg, const char *messagetext)
 283 {
 284         hprintf("HTTP/1.1 200 OK\n");
 285         output_headers(1, 1, 2, 0, 0, 0);
 286         wc_printf("<div id=\"banner\">\n");
 287         wc_printf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 288         wc_printf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 289         wc_printf("</td></tr></table>\n");
 290         wc_printf("</div>\n<div id=\"content\">\n");
 291         escputs(messagetext);
 292
 293         wc_printf("<hr />\n");
 294         wDumpContent(1);
 295 }
 296
 297
 298 /*
 299  * Display a blank page.
 300  */
 301 void blank_page(void) {
 302         output_headers(1, 1, 0, 0, 0, 0);
 303         wDumpContent(2);
 304 }
 305
 306
 307 /*
 308  * A template has been requested
 309  */
 310 void url_do_template(void) {
 311         const StrBuf *MimeType;
 312         const StrBuf *Tmpl = sbstr("template");
 313         begin_burst();
 314         MimeType = DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 315         http_transmit_thing(ChrPtr(MimeType), 0);
 316 }
 317
 318
 319
 320 /*
 321  * convenience function to indicate success
 322  */
 323 void display_success(char *successmessage)
 324 {
 325         convenience_page("007700", "OK", successmessage);
 326 }
 327
 328
 329 /*
 330  * Authorization required page
 331  * This is probably temporary and should be revisited
 332  */
 333 void authorization_required(void)
 334 {
 335         wcsession *WCC = WC;
 336         const char *message = "";
 337
 338         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 339         hprintf(
 340                 "Server: %s / %s\r\n"
 341                 "Connection: close\r\n",
 342                 PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software)
 343         );
 344         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(WC->serv_info->serv_humannode));
 345         hprintf("Content-Type: text/html\r\n");
 346         begin_burst();
 347         wc_printf("<h1>");
 348         wc_printf(_("Authorization Required"));
 349         wc_printf("</h1>\r\n");
 350
 351
 352         if (WCC->ImportantMsg != NULL)
 353                 message = ChrPtr(WCC->ImportantMsg);
 354         else if (WCC->ImportantMessage != NULL)
 355                 message = WCC->ImportantMessage;
 356
 357         wc_printf(_("The resource you requested requires a valid username and password. "
 358                 "You could not be logged in: %s\n"), message);
 359         wDumpContent(0);
 360         end_webcit_session();
 361 }
 362
 363 /*
 364  * Convenience functions to wrap around asynchronous ajax responses
 365  */
 366 void begin_ajax_response(void) {
 367         wcsession *WCC = WC;
 368
 369         FlushStrBuf(WCC->HBuf);
 370         output_headers(0, 0, 0, 0, 0, 0);
 371
 372         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 373                 "Server: %s\r\n"
 374                 "Connection: close\r\n"
 375                 ,
 376                 PACKAGE_STRING);
 377         begin_burst();
 378 }
 379
 380 /*
 381  * print ajax response footer
 382  */
 383 void end_ajax_response(void) {
 384         wDumpContent(0);
 385 }
 386
 387
 388
 389 /*
 390  * Wraps a Citadel server command in an AJAX transaction.
 391  */
 392 void ajax_servcmd(void)
 393 {
 394         wcsession *WCC = WC;
 395         int Done = 0;
 396         StrBuf *Buf;
 397         char *junk;
 398         size_t len;
 399
 400         begin_ajax_response();
 401         Buf = NewStrBuf();
 402         serv_puts(bstr("g_cmd"));
 403         StrBuf_ServGetln(Buf);
 404         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 405         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 406
 407         switch (GetServerStatus(Buf, NULL)) {
 408         case 8:
 409                 serv_puts("\n\n000");
 410                 if ( (StrLength(Buf)==3) &&
 411                      !strcmp(ChrPtr(Buf), "000")) {
 412                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\000"), 0);
 413                         break;
 414                 }
 415         case 1:
 416                 while (!Done) {
 417                         StrBuf_ServGetln(Buf);
 418                         if ( (StrLength(Buf)==3) &&
 419                              !strcmp(ChrPtr(Buf), "000")) {
 420                                 Done = 1;
 421                         }
 422                         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 423                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 424                 }
 425                 break;
 426         case 4:
 427                 text_to_server(bstr("g_input"));
 428                 serv_puts("000");
 429                 break;
 430         case 6:
 431                 len = atol(&ChrPtr(Buf)[4]);
 432                 StrBuf_ServGetBLOBBuffered(Buf, len);
 433                 break;
 434         case 7:
 435                 len = atol(&ChrPtr(Buf)[4]);
 436                 junk = malloc(len);
 437                 memset(junk, 0, len);
 438                 serv_write(junk, len);
 439                 free(junk);
 440         }
 441
 442         end_ajax_response();
 443
 444         /*
 445          * This is kind of an ugly hack, but this is the only place it can go.
 446          * If the command was GEXP, then the instant messenger window must be
 447          * running, so reset the "last_pager_check" watchdog timer so
 448          * that page_popup() doesn't try to open it a second time.
 449          */
 450         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 451                 WCC->last_pager_check = time(NULL);
 452         }
 453         FreeStrBuf(&Buf);
 454 }
 455
 456
 457 /*
 458  * Helper function for the asynchronous check to see if we need
 459  * to open the instant messenger window.
 460  */
 461 void seconds_since_last_gexp(void)
 462 {
 463         char buf[256];
 464
 465         if ( (time(NULL) - WC->last_pager_check) < 30) {
 466                 wc_printf("NO\n");
 467         }
 468         else {
 469                 memset(buf, 0, 5);
 470                 serv_puts("NOOP");
 471                 serv_getln(buf, sizeof buf);
 472                 if (buf[3] == '*') {
 473                         wc_printf("YES");
 474                 }
 475                 else {
 476                         wc_printf("NO");
 477                 }
 478         }
 479 }
 480
 481
 482
 483 int ReadPostData(void)
 484 {
 485         int rc;
 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         rc = client_read_to(WCC->Hdr, content,
 506                             WCC->Hdr->HR.ContentLength,
 507                             SLEEPING);
 508         if (rc < 0)
 509                 return rc;
 510
 511
 512         if (!strncasecmp(ChrPtr(WCC->Hdr->HR.ContentType), "application/x-www-form-urlencoded", 33)) {
 513                 StrBufCutLeft(content, body_start);
 514                 ParseURLParams(content);
 515         } else if (!strncasecmp(ChrPtr(WCC->Hdr->HR.ContentType), "multipart", 9)) {
 516                 char *Buf;
 517                 char *BufEnd;
 518                 long len;
 519
 520                 len = StrLength(content);
 521                 Buf = SmashStrBuf(&content);
 522                 BufEnd = Buf + len;
 523                 mime_parser(Buf, BufEnd, *upload_handler, NULL, NULL, NULL, 0);
 524                 free(Buf);
 525         } else if (WCC->Hdr->HR.ContentLength > 0) {
 526                 WCC->upload = content;
 527                 WCC->upload_length = StrLength(WCC->upload);
 528                 content = NULL;
 529         }
 530         FreeStrBuf(&content);
 531         return 1;
 532 }
 533
 534
 535 void ParseREST_URL(void)
 536 {
 537         StrBuf *Buf;
 538         StrBuf *pFloor = NULL;
 539         wcsession *WCC = WC;
 540         long i = 0;
 541         const char *pCh = NULL;
 542         HashList *Floors;
 543         void *vFloor;
 544
 545         lprintf(1, "parsing rest URL: %s\n", ChrPtr(WCC->Hdr->HR.ReqLine));
 546
 547         WCC->Directory = NewHash(1, Flathash);
 548         WCC->CurrentFloor = NULL;
 549
 550         Buf = NewStrBuf();
 551         while (StrBufExtract_NextToken(Buf, WCC->Hdr->HR.ReqLine, &pCh,  '/') >= 0)
 552         {
 553                 if (StrLength(Buf) != 0) {
 554                         /* ignore empty path segments */
 555                         StrBufUnescape(Buf, 1);
 556                         Put(WCC->Directory, IKEY(i), Buf, HFreeStrBuf);
 557                         if (i==0)
 558                                 pFloor = Buf;
 559                         Buf = NewStrBuf();
 560                 }
 561                 i++;
 562         }
 563
 564         FreeStrBuf(&Buf);
 565         if (pFloor != NULL)
 566         {
 567                 Floors = GetFloorListHash(NULL, NULL);
 568
 569                 if (Floors != NULL)
 570                 {
 571                         if (GetHash(WCC->FloorsByName, SKEY(pFloor), &vFloor))
 572                                 WCC->CurrentFloor = (Floor*) vFloor;
 573                 }
 574         }
 575 }
 576
 577 int Conditional_REST_DEPTH(StrBuf *Target, WCTemplputParams *TP)
 578 {
 579         long Depth, IsDepth;
 580         long offset = 0;
 581         wcsession *WCC = WC;
 582
 583         if (WCC->Hdr->HR.Handler != NULL)
 584                 offset ++;
 585         Depth = GetTemplateTokenNumber(Target, TP, 2, 0);
 586         IsDepth = GetCount(WCC->Directory) + offset;
 587
 588 //      LogTemplateError(Target, "bla", 1, TP, "REST_DEPTH: %ld : %ld\n", Depth, IsDepth);
 589         if (Depth < 0) {
 590                 Depth = -Depth;
 591                 return IsDepth > Depth;
 592         }
 593         else
 594                 return Depth == IsDepth;
 595 }
 596
 597
 598
 599 /*
 600  * Entry point for WebCit transaction
 601  */
 602 void session_loop(void)
 603 {
 604         int Flags = 0;
 605         int xhttp;
 606         StrBuf *Buf;
 607
 608         /*
 609          * We stuff these with the values coming from the client cookies,
 610          * so we can use them to reconnect a timed out session if we have to.
 611          */
 612         wcsession *WCC;
 613
 614         WCC= WC;
 615         WCC->upload_length = 0;
 616         WCC->upload = NULL;
 617         WCC->is_mobile = 0;
 618         WCC->Hdr->nWildfireHeaders = 0;
 619         if (WCC->Hdr->HR.Handler != NULL)
 620                 Flags = WCC->Hdr->HR.Handler->Flags; /* so we can temporarily add our own... */
 621
 622         if (WCC->Hdr->HR.ContentLength > 0) {
 623                 if (ReadPostData() < 0) {
 624                         return;
 625                 }
 626         }
 627
 628         Buf = NewStrBuf();
 629         WCC->trailing_javascript = NewStrBuf();
 630
 631         /* If there are variables in the URL, we must grab them now */
 632         if (WCC->Hdr->PlainArgs != NULL)
 633                 ParseURLParams(WCC->Hdr->PlainArgs);
 634
 635         /* If the client sent a nonce that is incorrect, kill the request. */
 636         if (havebstr("nonce")) {
 637                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 638                         bstr("nonce"), WCC->nonce);
 639                 if (ibstr("nonce") != WCC->nonce) {
 640                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 641                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 642                         hprintf("Content-Type: text/plain\r\n");
 643                         begin_burst();
 644                         wc_printf("Security check failed.\r\n");
 645                         end_burst();
 646                         goto SKIP_ALL_THIS_CRAP;
 647                 }
 648         }
 649
 650         /*
 651          * If we're not connected to a Citadel server, try to hook up the
 652          * connection now.
 653          */
 654         if (!WCC->connected) {
 655                 if (GetConnected ())
 656                         goto SKIP_ALL_THIS_CRAP;
 657         }
 658
 659
 660         /*
 661          * If we're not logged in, but we have authentication data (either from
 662          * a cookie or from http-auth), try logging in to Citadel using that.
 663          */
 664         if ((!WCC->logged_in)
 665             && (StrLength(WCC->Hdr->c_username) > 0)
 666             && (StrLength(WCC->Hdr->c_password) > 0))
 667         {
 668                 long Status;
 669
 670                 FlushStrBuf(Buf);
 671                 serv_printf("USER %s", ChrPtr(WCC->Hdr->c_username));
 672                 StrBuf_ServGetln(Buf);
 673                 if (GetServerStatus(Buf, &Status) == 3) {
 674                         serv_printf("PASS %s", ChrPtr(WCC->Hdr->c_password));
 675                         StrBuf_ServGetln(Buf);
 676                         if (GetServerStatus(Buf, NULL) == 2) {
 677                                 become_logged_in(WCC->Hdr->c_username,
 678                                                  WCC->Hdr->c_password, Buf);
 679                         } else {
 680                                 /* Should only display when password is wrong */
 681                                 WCC->ImportantMsg = NewStrBufPlain(ChrPtr(Buf) + 4, StrLength(Buf) - 4);
 682                                 authorization_required();
 683                                 FreeStrBuf(&Buf);
 684                                 goto SKIP_ALL_THIS_CRAP;
 685                         }
 686                 }
 687                 else if (Status == 541) {
 688                         WCC->logged_in = 1;
 689                 }
 690         }
 691
 692         xhttp = (WCC->Hdr->HR.eReqType != eGET) &&
 693                 (WCC->Hdr->HR.eReqType != ePOST) &&
 694                 (WCC->Hdr->HR.eReqType != eHEAD);
 695
 696         /*
 697          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 698          * prior to doing anything else.
 699          */
 700         if (havebstr("gotofirst")) {
 701                 int ret;
 702                 ret = gotoroom(sbstr("gotofirst"));     /* do quietly to avoid session output! */
 703                 if ((ret/100) != 2) {
 704                         lprintf(1, "GOTOFIRST: Unable to change to [%s]; Reason: %d\n",
 705                                 bstr("gotofirst"), ret);
 706                 }
 707         }
 708
 709         /*
 710          * If we aren't in any room yet, but we have cookie data telling us where we're
 711          * supposed to be, and 'gotofirst' was not specified, then go there.
 712          */
 713         else if ( (StrLength(WCC->CurRoom.name) == 0) && ( (StrLength(WCC->Hdr->c_roomname) > 0) )) {
 714                 int ret;
 715
 716                 lprintf(9, "We are in '%s' but cookie indicates '%s', going there...\n",
 717                         ChrPtr(WCC->CurRoom.name),
 718                         ChrPtr(WCC->Hdr->c_roomname)
 719                 );
 720                 ret = gotoroom(WCC->Hdr->c_roomname);   /* do quietly to avoid session output! */
 721                 if ((ret/100) != 2) {
 722                         lprintf(1, "COOKIEGOTO: Unable to change to [%s]; Reason: %d\n",
 723                                 ChrPtr(WCC->Hdr->c_roomname), ret);
 724                 }
 725         }
 726
 727         if (WCC->Hdr->HR.Handler != NULL) {
 728                 if (!WCC->logged_in && ((WCC->Hdr->HR.Handler->Flags & ANONYMOUS) == 0)) {
 729                         display_login();
 730                 }
 731                 else {
 732 /*
 733                         if ((WCC->Hdr->HR.Handler->Flags & PARSE_REST_URL) != 0)
 734                                 ParseREST_URL();
 735 */
 736                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 737                                 begin_ajax_response();
 738                         WCC->Hdr->HR.Handler->F();
 739                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 740                                 end_ajax_response();
 741                 }
 742         }
 743         /* When all else fais, display the main menu. */
 744         else {
 745                 /*
 746                  * ordinary browser users get a nice login screen, DAV etc. requsets
 747                  * are given a 401 so they can handle it appropriate.
 748                  */
 749                 if (!WCC->logged_in)  {
 750                         if (xhttp)
 751                                 authorization_required();
 752                         else
 753                                 display_login();
 754                 }
 755                 /*
 756                  * Toplevel dav requests? or just a flat browser request?
 757                  */
 758                 else {
 759                         if (xhttp)
 760                                 groupdav_main();
 761                         else
 762                                 display_main_menu();
 763                 }
 764         }
 765
 766 SKIP_ALL_THIS_CRAP:
 767         FreeStrBuf(&Buf);
 768         fflush(stdout);
 769 }
 770
 771
 772 /*
 773  * Replacement for sleep() that uses select() in order to avoid SIGALRM
 774  */
 775 void sleeeeeeeeeep(int seconds)
 776 {
 777         struct timeval tv;
 778
 779         tv.tv_sec = seconds;
 780         tv.tv_usec = 0;
 781         select(0, NULL, NULL, NULL, &tv);
 782 }
 783
 784 int Conditional_IS_HTTPS(StrBuf *Target, WCTemplputParams *TP)
 785 {
 786         return is_https != 0;
 787 }
 788
 789 void AppendImportantMessage(const char *pch, long len)
 790 {
 791         wcsession *WCC = WC;
 792
 793         if (StrLength(WCC->ImportantMsg) > 0) {
 794                 StrBufAppendBufPlain(WCC->ImportantMsg, HKEY("\n"), 0);
 795         }
 796
 797         StrBufAppendBufPlain(WCC->ImportantMsg, pch, len, 0);
 798 }
 799
 800 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
 801 {
 802         wcsession *WCC = WC;
 803         if (WCC != NULL)
 804                 return ((!IsEmptyStr(WCC->ImportantMessage)) ||
 805                         (StrLength(WCC->ImportantMsg) > 0));
 806         else
 807                 return 0;
 808 }
 809
 810 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
 811 {
 812         wcsession *WCC = WC;
 813
 814         if (WCC != NULL) {
 815                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 816                         StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
 817                         WCC->ImportantMessage[0] = '\0';
 818                 }
 819                 else if (StrLength(WCC->ImportantMsg) > 0) {
 820                         StrEscAppend(Target, WCC->ImportantMsg, NULL, 0, 0);
 821                         FlushStrBuf(WCC->ImportantMsg);
 822                 }
 823         }
 824 }
 825
 826 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
 827 {
 828         wcsession *WCC = WC;
 829
 830         if (WCC != NULL)
 831                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
 832 }
 833
 834 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
 835 {
 836         StrBufAppendBuf(Target,
 837                         csslocal, 0);
 838 }
 839
 840 extern char static_local_dir[PATH_MAX];
 841
 842
 843 void
 844 InitModule_WEBCIT
 845 (void)
 846 {
 847         char dir[SIZ];
 848         WebcitAddUrlHandler(HKEY("blank"), "", 0, blank_page, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 849         WebcitAddUrlHandler(HKEY("do_template"), "", 0, url_do_template, ANONYMOUS);
 850         WebcitAddUrlHandler(HKEY("sslg"), "", 0, seconds_since_last_gexp, AJAX|LOGCHATTY);
 851         WebcitAddUrlHandler(HKEY("ajax_servcmd"), "", 0, ajax_servcmd, 0);
 852         WebcitAddUrlHandler(HKEY("webcit"), "", 0, blank_page, URLNAMESPACE);
 853
 854         WebcitAddUrlHandler(HKEY("401"), "", 0, authorization_required, ANONYMOUS|COOKIEUNNEEDED);
 855         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
 856         RegisterConditional(HKEY("COND:REST:DEPTH"), 0, Conditional_REST_DEPTH, CTX_NONE);
 857         RegisterConditional(HKEY("COND:IS_HTTPS"), 0, Conditional_IS_HTTPS, CTX_NONE);
 858
 859         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, NULL, CTX_NONE);
 860         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, NULL, CTX_NONE);
 861         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, NULL, CTX_NONE);
 862         RegisterNamespace("URL:DISPLAYNAME", 0, 1, tmplput_HANDLER_DISPLAYNAME, NULL, CTX_NONE);
 863         RegisterNamespace("URL:HOSTNAME", 0, 1, tmplput_HOST_DISPLAYNAME, NULL, CTX_NONE);
 864
 865
 866         snprintf(dir, SIZ, "%s/webcit.css", static_local_dir);
 867         if (!access(dir, R_OK)) {
 868                 lprintf(9, "Using local Stylesheet [%s]\n", dir);
 869                 csslocal = NewStrBufPlain(HKEY("<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\" />"));
 870         }
 871         else
 872                 lprintf(9, "No Site-local Stylesheet [%s] installed. \n", dir);
 873
 874 }
 875
 876 void
 877 ServerStartModule_WEBCIT
 878 (void)
 879 {
 880         HandlerHash = NewHash(1, NULL);
 881 }
 882
 883
 884 void
 885 ServerShutdownModule_WEBCIT
 886 (void)
 887 {
 888         FreeStrBuf(&csslocal);
 889         DeleteHash(&HandlerHash);
 890 }
 891
 892
 893
 894 void
 895 SessionNewModule_WEBCIT
 896 (wcsession *sess)
 897 {
 898         sess->ImportantMsg = NewStrBuf();
 899         sess->WBuf = NewStrBufPlain(NULL, SIZ * 4);
 900         sess->HBuf = NewStrBufPlain(NULL, SIZ / 4);
 901 }
 902
 903 void
 904 SessionDetachModule_WEBCIT
 905 (wcsession *sess)
 906 {
 907         DeleteHash(&sess->Directory);
 908
 909         FreeStrBuf(&sess->upload);
 910         sess->upload_length = 0;
 911
 912         FreeStrBuf(&sess->trailing_javascript);
 913
 914         if (StrLength(sess->WBuf) > SIZ * 30) /* Bigger than 120K? release. */
 915         {
 916                 FreeStrBuf(&sess->WBuf);
 917                 sess->WBuf = NewStrBuf();
 918         }
 919         else
 920                 FlushStrBuf(sess->WBuf);
 921         FlushStrBuf(sess->HBuf);
 922 }
 923
 924 void
 925 SessionDestroyModule_WEBCIT
 926 (wcsession *sess)
 927 {
 928         FreeStrBuf(&sess->WBuf);
 929         FreeStrBuf(&sess->HBuf);
 930         FreeStrBuf(&sess->ImportantMsg);
 931 }
 932