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         Put(HandlerHash, UrlString, UrlSLen, NewHandler, DeleteWebcitHandler);
  45 }
  46
  47
  48 /*
  49  * web-printing funcion. uses our vsnprintf wrapper
  50  */
  51 void wprintf(const char *format,...)
  52 {
  53         wcsession *WCC = WC;
  54         va_list arg_ptr;
  55
  56         if (WCC->WBuf == NULL)
  57                 WCC->WBuf = NewStrBuf();
  58
  59         va_start(arg_ptr, format);
  60         StrBufVAppendPrintf(WCC->WBuf, format, arg_ptr);
  61         va_end(arg_ptr);
  62 }
  63
  64 /*
  65  * http-header-printing funcion. uses our vsnprintf wrapper
  66  */
  67 void hprintf(const char *format,...)
  68 {
  69         wcsession *WCC = WC;
  70         va_list arg_ptr;
  71
  72         va_start(arg_ptr, format);
  73         StrBufVAppendPrintf(WCC->HBuf, format, arg_ptr);
  74         va_end(arg_ptr);
  75 }
  76
  77
  78
  79 /*
  80  * wrap up an HTTP session, closes tags, etc.
  81  *
  82  * print_standard_html_footer should be set to:
  83  * 0            - to transmit only,
  84  * nonzero      - to append the closing tags
  85  */
  86 void wDumpContent(int print_standard_html_footer)
  87 {
  88         if (print_standard_html_footer) {
  89                 wprintf("</div> <!-- end of 'content' div -->\n");
  90                 do_template("trailing", NULL);
  91         }
  92
  93         /* If we've been saving it all up for one big output burst,
  94          * go ahead and do that now.
  95          */
  96         end_burst();
  97 }
  98
  99
 100
 101
 102 /*
 103  * Output HTTP headers and leading HTML for a page
 104  */
 105 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 106                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 107
 108                         int do_room_banner,     /* 0=no, 1=yes,
 109                                                  * 2 = I'm going to embed my own, so don't open the
 110                                                  *     <div id="content"> either.
 111                                                  */
 112
 113                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 114                         int suppress_check,     /* 1 = suppress check for instant messages          */
 115                         int cache               /* 1 = allow browser to cache this page             */
 116 ) {
 117         wcsession *WCC = WC;
 118         char cookie[1024];
 119         char httpnow[128];
 120
 121         hprintf("HTTP/1.1 200 OK\n");
 122         http_datestring(httpnow, sizeof httpnow, time(NULL));
 123
 124         if (do_httpheaders) {
 125                 if (WCC->serv_info != NULL)
 126                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 127                                 "Server: %s / %s\n"
 128                                 "Connection: close\r\n",
 129                                 PACKAGE_STRING,
 130                                 ChrPtr(WCC->serv_info->serv_software));
 131                 else
 132                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 133                                 "Server: %s / [n/a]\n"
 134                                 "Connection: close\r\n",
 135                                 PACKAGE_STRING);
 136         }
 137
 138         if (cache) {
 139                 char httpTomorow[128];
 140
 141                 http_datestring(httpTomorow, sizeof httpTomorow,
 142                                 time(NULL) + 60 * 60 * 24 * 2);
 143
 144                 hprintf("Pragma: public\r\n"
 145                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 146                         "Last-modified: %s\r\n"
 147                         "Expires: %s\r\n",
 148                         httpnow,
 149                         httpTomorow
 150                 );
 151         }
 152         else {
 153                 hprintf("Pragma: no-cache\r\n"
 154                         "Cache-Control: no-store\r\n"
 155                         "Expires: -1\r\n"
 156                 );
 157         }
 158
 159         stuff_to_cookie(cookie, 1024,
 160                         WCC->wc_session,
 161                         WCC->wc_username,
 162                         WCC->wc_password,
 163                         WCC->wc_roomname,
 164                         get_selected_language()
 165         );
 166
 167         if (unset_cookies) {
 168                 hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 169         } else {
 170                 hprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 171                 if (server_cookie != NULL) {
 172                         hprintf("%s\n", server_cookie);
 173                 }
 174         }
 175
 176         if (do_htmlhead) {
 177                 begin_burst();
 178                 do_template("head", NULL);
 179
 180                 /* check for ImportantMessages (these display in a div overlaying the main screen) */
 181                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 182                         wprintf("<div id=\"important_message\">\n"
 183                                 "<span class=\"imsg\">");
 184                         StrEscAppend(WCC->WBuf, NULL, WCC->ImportantMessage, 0, 0);
 185                         wprintf("</span><br />\n"
 186                                 "</div>\n"
 187                         );
 188                         StrBufAppendBufPlain(WCC->trailing_javascript,
 189                                              HKEY("setTimeout('hide_imsg_popup()', 5000);       \n"),
 190                                              0
 191                         );
 192                         WCC->ImportantMessage[0] = 0;
 193                 }
 194                 else if (StrLength(WCC->ImportantMsg) > 0) {
 195                         wprintf("<div id=\"important_message\">\n"
 196                                 "<span class=\"imsg\">");
 197                         StrEscAppend(WCC->WBuf, WCC->ImportantMsg, NULL, 0, 0);
 198                         wprintf("</span><br />\n"
 199                                 "</div>\n"
 200                         );
 201                         StrBufAppendBufPlain(WCC->trailing_javascript,
 202                                              HKEY("setTimeout('hide_imsg_popup()', 5000);       \n"),
 203                                              0
 204                         );
 205                         FlushStrBuf(WCC->ImportantMsg);
 206                 }
 207                 if ( (WCC->logged_in) && (!unset_cookies) ) {
 208                         /*DoTemplate(HKEY("iconbar"), NULL, &NoCtx);*/
 209                         page_popup();
 210                 }
 211
 212                 if (do_room_banner == 1) {
 213                         wprintf("<div id=\"banner\">\n");
 214                         embed_room_banner(NULL, navbar_default);
 215                         wprintf("</div>\n");
 216                 }
 217         }
 218
 219         if (do_room_banner == 1) {
 220                 wprintf("<div id=\"content\">\n");
 221         }
 222 }
 223
 224 void output_custom_content_header(const char *ctype) {
 225   hprintf("HTTP/1.1 200 OK\r\n");
 226   hprintf("Content-type: %s; charset=utf-8\r\n",ctype);
 227   hprintf("Server: %s / %s\r\n", PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software));
 228   hprintf("Connection: close\r\n");
 229 }
 230
 231
 232 /*
 233  * Generic function to do an HTTP redirect.  Easy and fun.
 234  */
 235 void http_redirect(const char *whichpage) {
 236         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 237         hprintf("Location: %s\r\n", whichpage);
 238         hprintf("URI: %s\r\n", whichpage);
 239         hprintf("Content-type: text/html; charset=utf-8\r\n");
 240         wprintf("<html><body>");
 241         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 242         wprintf("</body></html>\n");
 243         end_burst();
 244 }
 245
 246
 247
 248 /*
 249  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 250  */
 251 void http_transmit_thing(const char *content_type,
 252                          int is_static) {
 253
 254 #ifndef TECH_PREVIEW
 255         lprintf(9, "http_transmit_thing(%s)%s\n",
 256                 content_type,
 257                 (is_static ? " (static)" : "")
 258         );
 259 #endif
 260         output_headers(0, 0, 0, 0, 0, is_static);
 261
 262         hprintf("Content-type: %s\r\n"
 263                 "Server: %s\r\n"
 264                 "Connection: close\r\n",
 265                 content_type,
 266                 PACKAGE_STRING);
 267
 268         end_burst();
 269 }
 270
 271 /*
 272  * print menu box like used in the floor view or admin interface.
 273  * This function takes pair of strings as va_args,
 274  * Title        Title string of the box
 275  * Class        CSS Class for the box
 276  * nLines       How many string pairs should we print? (URL, UrlText)
 277  * ...          Pairs of URL Strings and their Names
 278  */
 279 void print_menu_box(char* Title, char *Class, int nLines, ...)
 280 {
 281         va_list arg_list;
 282         long i;
 283
 284         svput("BOXTITLE", WCS_STRING, Title);
 285         do_template("beginboxx", NULL);
 286
 287         wprintf("<ul class=\"%s\">", Class);
 288
 289         va_start(arg_list, nLines);
 290         for (i = 0; i < nLines; ++i)
 291         {
 292                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 293                 wprintf((char *) va_arg(arg_list, char *));
 294                 wprintf("</a></li>\n");
 295         }
 296         va_end (arg_list);
 297
 298         wprintf("</a></li>\n");
 299
 300         wprintf("</ul>");
 301
 302         do_template("endbox", NULL);
 303 }
 304
 305
 306
 307 /*
 308  * Convenience functions to display a page containing only a string
 309  *
 310  * titlebarcolor        color of the titlebar of the frame
 311  * titlebarmsg          text to display in the title bar
 312  * messagetext          body of the box
 313  */
 314 void convenience_page(const char *titlebarcolor, const char *titlebarmsg, const char *messagetext)
 315 {
 316         hprintf("HTTP/1.1 200 OK\n");
 317         output_headers(1, 1, 2, 0, 0, 0);
 318         wprintf("<div id=\"banner\">\n");
 319         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 320         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 321         wprintf("</td></tr></table>\n");
 322         wprintf("</div>\n<div id=\"content\">\n");
 323         escputs(messagetext);
 324
 325         wprintf("<hr />\n");
 326         wDumpContent(1);
 327 }
 328
 329
 330 /*
 331  * Display a blank page.
 332  */
 333 void blank_page(void) {
 334         output_headers(1, 1, 0, 0, 0, 0);
 335         wDumpContent(2);
 336 }
 337
 338
 339 /*
 340  * A template has been requested
 341  */
 342 void url_do_template(void) {
 343         const StrBuf *MimeType;
 344         const StrBuf *Tmpl = sbstr("template");
 345         begin_burst();
 346         MimeType = DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 347         http_transmit_thing(ChrPtr(MimeType), 0);
 348 }
 349
 350
 351
 352 /*
 353  * convenience function to indicate success
 354  */
 355 void display_success(char *successmessage)
 356 {
 357         convenience_page("007700", "OK", successmessage);
 358 }
 359
 360
 361 /*
 362  * Authorization required page
 363  * This is probably temporary and should be revisited
 364  */
 365 void authorization_required(const char *message)
 366 {
 367         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 368         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(WC->serv_info->serv_humannode));
 369         hprintf("Content-Type: text/html\r\n");
 370         wprintf("<h1>");
 371         wprintf(_("Authorization Required"));
 372         wprintf("</h1>\r\n");
 373         wprintf(_("The resource you requested requires a valid username and password. "
 374                 "You could not be logged in: %s\n"), message);
 375         wDumpContent(0);
 376
 377 }
 378
 379 /*
 380  * Convenience functions to wrap around asynchronous ajax responses
 381  */
 382 void begin_ajax_response(void) {
 383         wcsession *WCC = WC;
 384
 385         FlushStrBuf(WCC->HBuf);
 386         output_headers(0, 0, 0, 0, 0, 0);
 387
 388         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 389                 "Server: %s\r\n"
 390                 "Connection: close\r\n"
 391                 ,
 392                 PACKAGE_STRING);
 393         begin_burst();
 394 }
 395
 396 /*
 397  * print ajax response footer
 398  */
 399 void end_ajax_response(void) {
 400         wDumpContent(0);
 401 }
 402
 403         /* If it's a "force 404" situation then display the error and bail. */
 404 void do_404(void)
 405 {
 406         hprintf("HTTP/1.1 404 Not found\r\n");
 407         hprintf("Content-Type: text/plain\r\n");
 408         wprintf("Not found\r\n");
 409         end_burst();
 410 }
 411
 412
 413 /*
 414  * Wraps a Citadel server command in an AJAX transaction.
 415  */
 416 void ajax_servcmd(void)
 417 {
 418         wcsession *WCC = WC;
 419         int Done = 0;
 420         StrBuf *Buf;
 421         char *junk;
 422         size_t len;
 423
 424         begin_ajax_response();
 425         Buf = NewStrBuf();
 426         serv_puts(bstr("g_cmd"));
 427         StrBuf_ServGetln(Buf);
 428         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 429         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 430
 431         switch (GetServerStatus(Buf, NULL)) {
 432         case 8:
 433                 serv_puts("\n\n000");
 434                 if ( (StrLength(Buf)==3) &&
 435                      !strcmp(ChrPtr(Buf), "000")) {
 436                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\000"), 0);
 437                         break;
 438                 }
 439         case 1:
 440                 while (!Done) {
 441                         StrBuf_ServGetln(Buf);
 442                         if ( (StrLength(Buf)==3) &&
 443                              !strcmp(ChrPtr(Buf), "000")) {
 444                                 Done = 1;
 445                         }
 446                         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 447                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 448                 }
 449                 break;
 450         case 4:
 451                 text_to_server(bstr("g_input"));
 452                 serv_puts("000");
 453                 break;
 454         case 6:
 455                 len = atol(&ChrPtr(Buf)[4]);
 456                 StrBuf_ServGetBLOBBuffered(Buf, len);
 457                 break;
 458         case 7:
 459                 len = atol(&ChrPtr(Buf)[4]);
 460                 junk = malloc(len);
 461                 memset(junk, 0, len);
 462                 serv_write(junk, len);
 463                 free(junk);
 464         }
 465
 466         end_ajax_response();
 467
 468         /*
 469          * This is kind of an ugly hack, but this is the only place it can go.
 470          * If the command was GEXP, then the instant messenger window must be
 471          * running, so reset the "last_pager_check" watchdog timer so
 472          * that page_popup() doesn't try to open it a second time.
 473          */
 474         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 475                 WCC->last_pager_check = time(NULL);
 476         }
 477         FreeStrBuf(&Buf);
 478 }
 479
 480
 481 /*
 482  * Helper function for the asynchronous check to see if we need
 483  * to open the instant messenger window.
 484  */
 485 void seconds_since_last_gexp(void)
 486 {
 487         char buf[256];
 488
 489         if ( (time(NULL) - WC->last_pager_check) < 30) {
 490                 wprintf("NO\n");
 491         }
 492         else {
 493                 memset(buf, 0, 5);
 494                 serv_puts("NOOP");
 495                 serv_getln(buf, sizeof buf);
 496                 if (buf[3] == '*') {
 497                         wprintf("YES");
 498                 }
 499                 else {
 500                         wprintf("NO");
 501                 }
 502         }
 503 }
 504
 505
 506
 507 void ReadPostData(void)
 508 {
 509         const char *content_end = NULL;
 510         int body_start = 0;
 511         wcsession *WCC = WC;
 512         StrBuf *content = NULL;
 513
 514         content = NewStrBuf();
 515
 516         StrBufPrintf(content,
 517                      "Content-type: %s\n"
 518                      "Content-length: %ld\n\n",
 519                      ChrPtr(WCC->Hdr->ContentType),
 520                              WCC->Hdr->ContentLength);
 521 /*
 522   hprintf("Content-type: %s\n"
 523   "Content-length: %d\n\n",
 524   ContentType, ContentLength);
 525 */
 526         body_start = StrLength(content);
 527
 528         /** Read the entire input data at once. */
 529         client_read_to(&WCC->Hdr->http_sock,
 530                        content,
 531                        WCC->Hdr->ReadBuf, &WCC->Hdr->Pos,
 532                        WCC->Hdr->ContentLength,
 533                        SLEEPING);
 534
 535         if (!strncasecmp(ChrPtr(WCC->Hdr->ContentType), "application/x-www-form-urlencoded", 33)) {
 536                 StrBufCutLeft(content, body_start);
 537                 ParseURLParams(content);
 538         } else if (!strncasecmp(ChrPtr(WCC->Hdr->ContentType), "multipart", 9)) {
 539                 content_end = ChrPtr(content) +
 540                         WCC->Hdr->ContentLength +
 541                         body_start;
 542                 mime_parser(ChrPtr(content), content_end, *upload_handler, NULL, NULL, NULL, 0);
 543         }
 544         FreeStrBuf(&content);
 545 }
 546
 547
 548 /*
 549  * Entry point for WebCit transaction
 550  */
 551 void session_loop(void)
 552 {
 553         int Flags = 0;
 554         int xhttp;
 555         StrBuf *Buf;
 556
 557         char buf[SIZ];
 558
 559         /*
 560          * We stuff these with the values coming from the client cookies,
 561          * so we can use them to reconnect a timed out session if we have to.
 562          */
 563         wcsession *WCC;
 564
 565
 566         Buf = NewStrBuf();
 567
 568         WCC= WC;
 569
 570         WCC->upload_length = 0;
 571         WCC->upload = NULL;
 572         WCC->is_mobile = 0;
 573         WCC->trailing_javascript = NewStrBuf();
 574         WCC->Hdr->nWildfireHeaders = 0;
 575         if (WCC->Hdr->Handler != NULL)
 576                 Flags = WCC->Hdr->Handler->Flags; /* so we can temporarily add our own... */
 577
 578         if (WCC->Hdr->ContentLength > 0) {
 579                 ReadPostData();
 580         }
 581
 582         /* If there are variables in the URL, we must grab them now */
 583         if (WCC->Hdr->PlainArgs != NULL)
 584                 ParseURLParams(WCC->Hdr->PlainArgs);
 585
 586         /* If the client sent a nonce that is incorrect, kill the request. */
 587         if (havebstr("nonce")) {
 588                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 589                         bstr("nonce"), WCC->nonce);
 590                 if (ibstr("nonce") != WCC->nonce) {
 591                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 592                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 593                         hprintf("Content-Type: text/plain\r\n\r\n");
 594                         wprintf("Security check failed.\r\n");
 595                         end_burst();
 596                         goto SKIP_ALL_THIS_CRAP;
 597                 }
 598         }
 599
 600         /*
 601          * If we're not connected to a Citadel server, try to hook up the
 602          * connection now.
 603          */
 604         if (!WCC->connected) {
 605                 if (GetConnected ())
 606                         goto SKIP_ALL_THIS_CRAP;
 607         }
 608
 609
 610         /*
 611          * If we're not logged in, but we have authentication data (either from
 612          * a cookie or from http-auth), try logging in to Citadel using that.
 613          */
 614         if ((!WCC->logged_in)
 615             && (StrLength(WCC->Hdr->c_username) > 0)
 616             && (StrLength(WCC->Hdr->c_password) > 0))
 617         {
 618                 FlushStrBuf(Buf);
 619                 serv_printf("USER %s", ChrPtr(WCC->Hdr->c_username));
 620                 StrBuf_ServGetln(Buf);
 621                 if (GetServerStatus(Buf, NULL) == 3) {
 622                         serv_printf("PASS %s", ChrPtr(WCC->Hdr->c_password));
 623                         StrBuf_ServGetln(Buf);
 624                         if (GetServerStatus(Buf, NULL) == 2) {
 625                                 become_logged_in(WCC->Hdr->c_username,
 626                                                  WCC->Hdr->c_password, Buf);
 627                         } else {
 628                                 /* Should only display when password is wrong */
 629                                 authorization_required(&buf[4]);
 630                                 FreeStrBuf(&Buf);
 631                                 goto SKIP_ALL_THIS_CRAP;
 632                         }
 633                 }
 634         }
 635
 636         xhttp = (WCC->Hdr->eReqType != eGET) &&
 637                 (WCC->Hdr->eReqType != ePOST) &&
 638                 (WCC->Hdr->eReqType != eHEAD);
 639
 640         /*
 641          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 642          * prior to doing anything else.
 643          */
 644         if (havebstr("gotofirst")) {
 645                 int ret;
 646                 ret = gotoroom(sbstr("gotofirst"));     /* do quietly to avoid session output! */
 647                 if ((ret/100) != 2) {
 648                         lprintf(1, "GOTOFIRST: Unable to change to [%s]; Reason: %d\n",
 649                                 bstr("gotofirst"), ret);
 650                 }
 651         }
 652
 653         /*
 654          * If we aren't in any room yet, but we have cookie data telling us where we're
 655          * supposed to be, and 'gotofirst' was not specified, then go there.
 656          */
 657         else if ( (StrLength(WCC->wc_roomname) == 0) && ( (StrLength(WCC->Hdr->c_roomname) > 0) )) {
 658                 lprintf(9, "We are in '%s' but cookie indicates '%s', going there...\n",
 659                         ChrPtr(WCC->wc_roomname),
 660                         ChrPtr(WCC->Hdr->c_roomname)
 661                 );
 662                 int ret;
 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->Handler != NULL) {
 671                 if (!WCC->logged_in && ((WCC->Hdr->Handler->Flags & ANONYMOUS) == 0)) {
 672                         display_login(NULL);
 673                 }
 674                 else {
 675                         if ((WCC->Hdr->Handler->Flags & AJAX) != 0)
 676                                 begin_ajax_response();
 677                         WCC->Hdr->Handler->F();
 678                         if ((WCC->Hdr->Handler->Flags & AJAX) != 0)
 679                                 end_ajax_response();
 680                 }
 681         }
 682         /* When all else fais, display the main menu. */
 683         else {
 684                 if (!WCC->logged_in)
 685                         display_login(NULL);
 686                 else
 687                         display_main_menu();
 688         }
 689
 690 SKIP_ALL_THIS_CRAP:
 691         FreeStrBuf(&Buf);
 692         fflush(stdout);
 693         WCC->Hdr->http_host = NULL;
 694 }
 695
 696
 697 /*
 698  * Replacement for sleep() that uses select() in order to avoid SIGALRM
 699  */
 700 void sleeeeeeeeeep(int seconds)
 701 {
 702         struct timeval tv;
 703
 704         tv.tv_sec = seconds;
 705         tv.tv_usec = 0;
 706         select(0, NULL, NULL, NULL, &tv);
 707 }
 708
 709
 710 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
 711 {
 712         wcsession *WCC = WC;
 713         if (WCC != NULL)
 714                 return ((!IsEmptyStr(WCC->ImportantMessage)) ||
 715                         (StrLength(WCC->ImportantMsg) > 0));
 716         else
 717                 return 0;
 718 }
 719
 720 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
 721 {
 722         wcsession *WCC = WC;
 723
 724         if (WCC != NULL) {
 725                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 726                         StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
 727                         WCC->ImportantMessage[0] = '\0';
 728                 }
 729                 else if (StrLength(WCC->ImportantMsg) > 0) {
 730                         StrEscAppend(Target, WCC->ImportantMsg, NULL, 0, 0);
 731                         FlushStrBuf(WCC->ImportantMsg);
 732                 }
 733         }
 734 }
 735
 736 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
 737 {
 738         wcsession *WCC = WC;
 739
 740         if (WCC != NULL)
 741                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
 742 }
 743
 744 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
 745 {
 746         StrBufAppendBuf(Target,
 747                         csslocal, 0);
 748 }
 749
 750 extern char static_local_dir[PATH_MAX];
 751
 752
 753 void
 754 InitModule_WEBCIT
 755 (void)
 756 {
 757         char dir[SIZ];
 758         WebcitAddUrlHandler(HKEY("404"), do_404, ANONYMOUS|COOKIEUNNEEDED);
 759         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 760
 761
 762         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS);
 763         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
 764         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX|LOGCHATTY);
 765         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
 766
 767         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
 768         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, CTX_NONE);
 769         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
 770         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, CTX_NONE);
 771
 772         snprintf(dir, SIZ, "%s/static.local/webcit.css", static_local_dir);
 773         if (!access(dir, R_OK)) {
 774                 lprintf(9, "Using local Stylesheet [%s]\n", dir);
 775                 csslocal = NewStrBufPlain(HKEY("<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\">"));
 776         }
 777         else
 778                 lprintf(9, "Didn't find site local Stylesheet [%s]\n", dir);
 779
 780 }
 781
 782 void
 783 ServerStartModule_WEBCIT
 784 (void)
 785 {
 786         HandlerHash = NewHash(1, NULL);
 787 }
 788
 789
 790 void
 791 ServerShutdownModule_WEBCIT
 792 (void)
 793 {
 794         FreeStrBuf(&csslocal);
 795         DeleteHash(&HandlerHash);
 796 }
 797
 798
 799
 800 void
 801 SessionNewModule_WEBCIT
 802 (wcsession *sess)
 803 {
 804         sess->ImportantMsg = NewStrBuf();
 805         sess->WBuf = NewStrBuf();
 806         sess->HBuf = NewStrBuf();
 807 }
 808
 809 void
 810 SessionDetachModule_WEBCIT
 811 (wcsession *sess)
 812 {
 813         DeleteHash(&sess->Hdr->urlstrings);// TODO?
 814         if (sess->upload_length > 0) {
 815                 free(sess->upload);
 816                 sess->upload_length = 0;
 817         }
 818         FreeStrBuf(&sess->trailing_javascript);
 819
 820         if (StrLength(sess->WBuf) > SIZ * 30) /* Bigger than 120K? release. */
 821         {
 822                 FreeStrBuf(&sess->WBuf);
 823                 sess->WBuf = NewStrBuf();
 824         }
 825         else
 826                 FlushStrBuf(sess->WBuf);
 827         FlushStrBuf(sess->HBuf);
 828 }
 829
 830 void
 831 SessionDestroyModule_WEBCIT
 832 (wcsession *sess)
 833 {
 834         FreeStrBuf(&sess->WBuf);
 835         FreeStrBuf(&sess->HBuf);
 836         FreeStrBuf(&sess->ImportantMsg);
 837 }
 838