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 > 0) {
 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         if (cache < 2) {
 160
 161                 stuff_to_cookie(cookie, 1024,
 162                                 WCC->wc_session,
 163                                 WCC->wc_username,
 164                                 WCC->wc_password,
 165                                 WCC->wc_roomname,
 166                                 get_selected_language()
 167                         );
 168
 169                 if (unset_cookies) {
 170                         hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 171                 } else {
 172                         hprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 173                         if (server_cookie != NULL) {
 174                                 hprintf("%s\n", server_cookie);
 175                         }
 176                 }
 177         }
 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                         wprintf("<div id=\"important_message\">\n"
 186                                 "<span class=\"imsg\">");
 187                         StrEscAppend(WCC->WBuf, NULL, WCC->ImportantMessage, 0, 0);
 188                         wprintf("</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                         wprintf("<div id=\"important_message\">\n"
 199                                 "<span class=\"imsg\">");
 200                         StrEscAppend(WCC->WBuf, WCC->ImportantMsg, NULL, 0, 0);
 201                         wprintf("</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("iconbar"), NULL, &NoCtx);*/
 212                         page_popup();
 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         wprintf("<html><body>");
 244         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 245         wprintf("</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  * print menu box like used in the floor view or admin interface.
 276  * This function takes pair of strings as va_args,
 277  * Title        Title string of the box
 278  * Class        CSS Class for the box
 279  * nLines       How many string pairs should we print? (URL, UrlText)
 280  * ...          Pairs of URL Strings and their Names
 281  */
 282 void print_menu_box(char* Title, char *Class, int nLines, ...)
 283 {
 284         va_list arg_list;
 285         long i;
 286
 287         svput("BOXTITLE", WCS_STRING, Title);
 288         do_template("beginboxx", NULL);
 289
 290         wprintf("<ul class=\"%s\">", Class);
 291
 292         va_start(arg_list, nLines);
 293         for (i = 0; i < nLines; ++i)
 294         {
 295                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 296                 wprintf((char *) va_arg(arg_list, char *));
 297                 wprintf("</a></li>\n");
 298         }
 299         va_end (arg_list);
 300
 301         wprintf("</a></li>\n");
 302
 303         wprintf("</ul>");
 304
 305         do_template("endbox", NULL);
 306 }
 307
 308
 309
 310 /*
 311  * Convenience functions to display a page containing only a string
 312  *
 313  * titlebarcolor        color of the titlebar of the frame
 314  * titlebarmsg          text to display in the title bar
 315  * messagetext          body of the box
 316  */
 317 void convenience_page(const char *titlebarcolor, const char *titlebarmsg, const char *messagetext)
 318 {
 319         hprintf("HTTP/1.1 200 OK\n");
 320         output_headers(1, 1, 2, 0, 0, 0);
 321         wprintf("<div id=\"banner\">\n");
 322         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 323         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 324         wprintf("</td></tr></table>\n");
 325         wprintf("</div>\n<div id=\"content\">\n");
 326         escputs(messagetext);
 327
 328         wprintf("<hr />\n");
 329         wDumpContent(1);
 330 }
 331
 332
 333 /*
 334  * Display a blank page.
 335  */
 336 void blank_page(void) {
 337         output_headers(1, 1, 0, 0, 0, 0);
 338         wDumpContent(2);
 339 }
 340
 341
 342 /*
 343  * A template has been requested
 344  */
 345 void url_do_template(void) {
 346         const StrBuf *MimeType;
 347         const StrBuf *Tmpl = sbstr("template");
 348         begin_burst();
 349         MimeType = DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 350         http_transmit_thing(ChrPtr(MimeType), 0);
 351 }
 352
 353
 354
 355 /*
 356  * convenience function to indicate success
 357  */
 358 void display_success(char *successmessage)
 359 {
 360         convenience_page("007700", "OK", successmessage);
 361 }
 362
 363
 364 /*
 365  * Authorization required page
 366  * This is probably temporary and should be revisited
 367  */
 368 void authorization_required(const char *message)
 369 {
 370         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 371         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(WC->serv_info->serv_humannode));
 372         hprintf("Content-Type: text/html\r\n");
 373         wprintf("<h1>");
 374         wprintf(_("Authorization Required"));
 375         wprintf("</h1>\r\n");
 376         wprintf(_("The resource you requested requires a valid username and password. "
 377                 "You could not be logged in: %s\n"), message);
 378         wDumpContent(0);
 379
 380 }
 381
 382 /*
 383  * Convenience functions to wrap around asynchronous ajax responses
 384  */
 385 void begin_ajax_response(void) {
 386         wcsession *WCC = WC;
 387
 388         FlushStrBuf(WCC->HBuf);
 389         output_headers(0, 0, 0, 0, 0, 0);
 390
 391         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 392                 "Server: %s\r\n"
 393                 "Connection: close\r\n"
 394                 ,
 395                 PACKAGE_STRING);
 396         begin_burst();
 397 }
 398
 399 /*
 400  * print ajax response footer
 401  */
 402 void end_ajax_response(void) {
 403         wDumpContent(0);
 404 }
 405
 406
 407
 408 /*
 409  * Wraps a Citadel server command in an AJAX transaction.
 410  */
 411 void ajax_servcmd(void)
 412 {
 413         wcsession *WCC = WC;
 414         int Done = 0;
 415         StrBuf *Buf;
 416         char *junk;
 417         size_t len;
 418
 419         begin_ajax_response();
 420         Buf = NewStrBuf();
 421         serv_puts(bstr("g_cmd"));
 422         StrBuf_ServGetln(Buf);
 423         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 424         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 425
 426         switch (GetServerStatus(Buf, NULL)) {
 427         case 8:
 428                 serv_puts("\n\n000");
 429                 if ( (StrLength(Buf)==3) &&
 430                      !strcmp(ChrPtr(Buf), "000")) {
 431                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\000"), 0);
 432                         break;
 433                 }
 434         case 1:
 435                 while (!Done) {
 436                         StrBuf_ServGetln(Buf);
 437                         if ( (StrLength(Buf)==3) &&
 438                              !strcmp(ChrPtr(Buf), "000")) {
 439                                 Done = 1;
 440                         }
 441                         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 442                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 443                 }
 444                 break;
 445         case 4:
 446                 text_to_server(bstr("g_input"));
 447                 serv_puts("000");
 448                 break;
 449         case 6:
 450                 len = atol(&ChrPtr(Buf)[4]);
 451                 StrBuf_ServGetBLOBBuffered(Buf, len);
 452                 break;
 453         case 7:
 454                 len = atol(&ChrPtr(Buf)[4]);
 455                 junk = malloc(len);
 456                 memset(junk, 0, len);
 457                 serv_write(junk, len);
 458                 free(junk);
 459         }
 460
 461         end_ajax_response();
 462
 463         /*
 464          * This is kind of an ugly hack, but this is the only place it can go.
 465          * If the command was GEXP, then the instant messenger window must be
 466          * running, so reset the "last_pager_check" watchdog timer so
 467          * that page_popup() doesn't try to open it a second time.
 468          */
 469         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 470                 WCC->last_pager_check = time(NULL);
 471         }
 472         FreeStrBuf(&Buf);
 473 }
 474
 475
 476 /*
 477  * Helper function for the asynchronous check to see if we need
 478  * to open the instant messenger window.
 479  */
 480 void seconds_since_last_gexp(void)
 481 {
 482         char buf[256];
 483
 484         if ( (time(NULL) - WC->last_pager_check) < 30) {
 485                 wprintf("NO\n");
 486         }
 487         else {
 488                 memset(buf, 0, 5);
 489                 serv_puts("NOOP");
 490                 serv_getln(buf, sizeof buf);
 491                 if (buf[3] == '*') {
 492                         wprintf("YES");
 493                 }
 494                 else {
 495                         wprintf("NO");
 496                 }
 497         }
 498 }
 499
 500
 501
 502 void ReadPostData(void)
 503 {
 504         const char *content_end = NULL;
 505         int body_start = 0;
 506         wcsession *WCC = WC;
 507         StrBuf *content = NULL;
 508
 509         content = NewStrBuf();
 510
 511         StrBufPrintf(content,
 512                      "Content-type: %s\n"
 513                      "Content-length: %ld\n\n",
 514                      ChrPtr(WCC->Hdr->HR.ContentType),
 515                              WCC->Hdr->HR.ContentLength);
 516 /*
 517   hprintf("Content-type: %s\n"
 518   "Content-length: %d\n\n",
 519   ContentType, ContentLength);
 520 */
 521         body_start = StrLength(content);
 522
 523         /** Read the entire input data at once. */
 524         client_read_to(WCC->Hdr, content,
 525                        WCC->Hdr->HR.ContentLength,
 526                        SLEEPING);
 527
 528         if (!strncasecmp(ChrPtr(WCC->Hdr->HR.ContentType), "application/x-www-form-urlencoded", 33)) {
 529                 StrBufCutLeft(content, body_start);
 530                 ParseURLParams(content);
 531         } else if (!strncasecmp(ChrPtr(WCC->Hdr->HR.ContentType), "multipart", 9)) {
 532                 content_end = ChrPtr(content) +
 533                         WCC->Hdr->HR.ContentLength +
 534                         body_start;
 535                 mime_parser(ChrPtr(content), content_end, *upload_handler, NULL, NULL, NULL, 0);
 536         }
 537         FreeStrBuf(&content);
 538 }
 539
 540
 541 /*
 542  * Entry point for WebCit transaction
 543  */
 544 void session_loop(void)
 545 {
 546         int Flags = 0;
 547         int xhttp;
 548         StrBuf *Buf;
 549
 550         char buf[SIZ];
 551
 552         /*
 553          * We stuff these with the values coming from the client cookies,
 554          * so we can use them to reconnect a timed out session if we have to.
 555          */
 556         wcsession *WCC;
 557
 558
 559         Buf = NewStrBuf();
 560
 561         WCC= WC;
 562
 563         WCC->upload_length = 0;
 564         WCC->upload = NULL;
 565         WCC->is_mobile = 0;
 566         WCC->trailing_javascript = NewStrBuf();
 567         WCC->Hdr->nWildfireHeaders = 0;
 568         if (WCC->Hdr->HR.Handler != NULL)
 569                 Flags = WCC->Hdr->HR.Handler->Flags; /* so we can temporarily add our own... */
 570
 571         if (WCC->Hdr->HR.ContentLength > 0) {
 572                 ReadPostData();
 573         }
 574
 575         /* If there are variables in the URL, we must grab them now */
 576         if (WCC->Hdr->PlainArgs != NULL)
 577                 ParseURLParams(WCC->Hdr->PlainArgs);
 578
 579         /* If the client sent a nonce that is incorrect, kill the request. */
 580         if (havebstr("nonce")) {
 581                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 582                         bstr("nonce"), WCC->nonce);
 583                 if (ibstr("nonce") != WCC->nonce) {
 584                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 585                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 586                         hprintf("Content-Type: text/plain\r\n\r\n");
 587                         wprintf("Security check failed.\r\n");
 588                         end_burst();
 589                         goto SKIP_ALL_THIS_CRAP;
 590                 }
 591         }
 592
 593         /*
 594          * If we're not connected to a Citadel server, try to hook up the
 595          * connection now.
 596          */
 597         if (!WCC->connected) {
 598                 if (GetConnected ())
 599                         goto SKIP_ALL_THIS_CRAP;
 600         }
 601
 602
 603         /*
 604          * If we're not logged in, but we have authentication data (either from
 605          * a cookie or from http-auth), try logging in to Citadel using that.
 606          */
 607         if ((!WCC->logged_in)
 608             && (StrLength(WCC->Hdr->c_username) > 0)
 609             && (StrLength(WCC->Hdr->c_password) > 0))
 610         {
 611                 FlushStrBuf(Buf);
 612                 serv_printf("USER %s", ChrPtr(WCC->Hdr->c_username));
 613                 StrBuf_ServGetln(Buf);
 614                 if (GetServerStatus(Buf, NULL) == 3) {
 615                         serv_printf("PASS %s", ChrPtr(WCC->Hdr->c_password));
 616                         StrBuf_ServGetln(Buf);
 617                         if (GetServerStatus(Buf, NULL) == 2) {
 618                                 become_logged_in(WCC->Hdr->c_username,
 619                                                  WCC->Hdr->c_password, Buf);
 620                         } else {
 621                                 /* Should only display when password is wrong */
 622                                 authorization_required(&buf[4]);
 623                                 FreeStrBuf(&Buf);
 624                                 goto SKIP_ALL_THIS_CRAP;
 625                         }
 626                 }
 627         }
 628
 629         xhttp = (WCC->Hdr->HR.eReqType != eGET) &&
 630                 (WCC->Hdr->HR.eReqType != ePOST) &&
 631                 (WCC->Hdr->HR.eReqType != eHEAD);
 632
 633         /*
 634          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 635          * prior to doing anything else.
 636          */
 637         if (havebstr("gotofirst")) {
 638                 int ret;
 639                 ret = gotoroom(sbstr("gotofirst"));     /* do quietly to avoid session output! */
 640                 if ((ret/100) != 2) {
 641                         lprintf(1, "GOTOFIRST: Unable to change to [%s]; Reason: %d\n",
 642                                 bstr("gotofirst"), ret);
 643                 }
 644         }
 645
 646         /*
 647          * If we aren't in any room yet, but we have cookie data telling us where we're
 648          * supposed to be, and 'gotofirst' was not specified, then go there.
 649          */
 650         else if ( (StrLength(WCC->wc_roomname) == 0) && ( (StrLength(WCC->Hdr->c_roomname) > 0) )) {
 651                 int ret;
 652
 653                 lprintf(9, "We are in '%s' but cookie indicates '%s', going there...\n",
 654                         ChrPtr(WCC->wc_roomname),
 655                         ChrPtr(WCC->Hdr->c_roomname)
 656                 );
 657                 ret = gotoroom(WCC->Hdr->c_roomname);   /* do quietly to avoid session output! */
 658                 if ((ret/100) != 2) {
 659                         lprintf(1, "COOKIEGOTO: Unable to change to [%s]; Reason: %d\n",
 660                                 ChrPtr(WCC->Hdr->c_roomname), ret);
 661                 }
 662         }
 663
 664         if (WCC->Hdr->HR.Handler != NULL) {
 665                 if (!WCC->logged_in && ((WCC->Hdr->HR.Handler->Flags & ANONYMOUS) == 0)) {
 666                         display_login(NULL);
 667                 }
 668                 else {
 669                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 670                                 begin_ajax_response();
 671                         WCC->Hdr->HR.Handler->F();
 672                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 673                                 end_ajax_response();
 674                 }
 675         }
 676         /* When all else fais, display the main menu. */
 677         else {
 678                 if (!WCC->logged_in)
 679                         display_login(NULL);
 680                 else
 681                         display_main_menu();
 682         }
 683
 684 SKIP_ALL_THIS_CRAP:
 685         FreeStrBuf(&Buf);
 686         fflush(stdout);
 687 }
 688
 689
 690 /*
 691  * Replacement for sleep() that uses select() in order to avoid SIGALRM
 692  */
 693 void sleeeeeeeeeep(int seconds)
 694 {
 695         struct timeval tv;
 696
 697         tv.tv_sec = seconds;
 698         tv.tv_usec = 0;
 699         select(0, NULL, NULL, NULL, &tv);
 700 }
 701
 702
 703 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
 704 {
 705         wcsession *WCC = WC;
 706         if (WCC != NULL)
 707                 return ((!IsEmptyStr(WCC->ImportantMessage)) ||
 708                         (StrLength(WCC->ImportantMsg) > 0));
 709         else
 710                 return 0;
 711 }
 712
 713 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
 714 {
 715         wcsession *WCC = WC;
 716
 717         if (WCC != NULL) {
 718                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 719                         StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
 720                         WCC->ImportantMessage[0] = '\0';
 721                 }
 722                 else if (StrLength(WCC->ImportantMsg) > 0) {
 723                         StrEscAppend(Target, WCC->ImportantMsg, NULL, 0, 0);
 724                         FlushStrBuf(WCC->ImportantMsg);
 725                 }
 726         }
 727 }
 728
 729 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
 730 {
 731         wcsession *WCC = WC;
 732
 733         if (WCC != NULL)
 734                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
 735 }
 736
 737 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
 738 {
 739         StrBufAppendBuf(Target,
 740                         csslocal, 0);
 741 }
 742
 743 extern char static_local_dir[PATH_MAX];
 744
 745
 746 void
 747 InitModule_WEBCIT
 748 (void)
 749 {
 750         char dir[SIZ];
 751         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 752         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
 753         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX|LOGCHATTY);
 754         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
 755         WebcitAddUrlHandler(HKEY("webcit"), blank_page, URLNAMESPACE);
 756
 757         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
 758         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, CTX_NONE);
 759         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
 760         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, CTX_NONE);
 761
 762         snprintf(dir, SIZ, "%s/static.local/webcit.css", static_local_dir);
 763         if (!access(dir, R_OK)) {
 764                 lprintf(9, "Using local Stylesheet [%s]\n", dir);
 765                 csslocal = NewStrBufPlain(HKEY("<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\">"));
 766         }
 767         else
 768                 lprintf(9, "Didn't find site local Stylesheet [%s]\n", dir);
 769
 770 }
 771
 772 void
 773 ServerStartModule_WEBCIT
 774 (void)
 775 {
 776         HandlerHash = NewHash(1, NULL);
 777 }
 778
 779
 780 void
 781 ServerShutdownModule_WEBCIT
 782 (void)
 783 {
 784         FreeStrBuf(&csslocal);
 785         DeleteHash(&HandlerHash);
 786 }
 787
 788
 789
 790 void
 791 SessionNewModule_WEBCIT
 792 (wcsession *sess)
 793 {
 794         sess->ImportantMsg = NewStrBuf();
 795         sess->WBuf = NewStrBuf();
 796         sess->HBuf = NewStrBuf();
 797 }
 798
 799 void
 800 SessionDetachModule_WEBCIT
 801 (wcsession *sess)
 802 {
 803         DeleteHash(&sess->Hdr->urlstrings);// TODO?
 804         if (sess->upload_length > 0) {
 805                 free(sess->upload);
 806                 sess->upload_length = 0;
 807         }
 808         FreeStrBuf(&sess->trailing_javascript);
 809
 810         if (StrLength(sess->WBuf) > SIZ * 30) /* Bigger than 120K? release. */
 811         {
 812                 FreeStrBuf(&sess->WBuf);
 813                 sess->WBuf = NewStrBuf();
 814         }
 815         else
 816                 FlushStrBuf(sess->WBuf);
 817         FlushStrBuf(sess->HBuf);
 818 }
 819
 820 void
 821 SessionDestroyModule_WEBCIT
 822 (wcsession *sess)
 823 {
 824         FreeStrBuf(&sess->WBuf);
 825         FreeStrBuf(&sess->HBuf);
 826         FreeStrBuf(&sess->ImportantMsg);
 827 }
 828