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 void WebcitAddUrlHandler(const char * UrlString,
  26                          long UrlSLen,
  27                          WebcitHandlerFunc F,
  28                          long Flags)
  29 {
  30         WebcitHandler *NewHandler;
  31         NewHandler = (WebcitHandler*) malloc(sizeof(WebcitHandler));
  32         NewHandler->F = F;
  33         NewHandler->Flags = Flags;
  34         Put(HandlerHash, UrlString, UrlSLen, NewHandler, NULL);
  35 }
  36
  37
  38 /*
  39  * web-printing funcion. uses our vsnprintf wrapper
  40  */
  41 void wprintf(const char *format,...)
  42 {
  43         wcsession *WCC = WC;
  44         va_list arg_ptr;
  45
  46         if (WCC->WBuf == NULL)
  47                 WCC->WBuf = NewStrBuf();
  48
  49         va_start(arg_ptr, format);
  50         StrBufVAppendPrintf(WCC->WBuf, format, arg_ptr);
  51         va_end(arg_ptr);
  52 }
  53
  54 /*
  55  * http-header-printing funcion. uses our vsnprintf wrapper
  56  */
  57 void hprintf(const char *format,...)
  58 {
  59         wcsession *WCC = WC;
  60         va_list arg_ptr;
  61
  62         va_start(arg_ptr, format);
  63         StrBufVAppendPrintf(WCC->HBuf, format, arg_ptr);
  64         va_end(arg_ptr);
  65 }
  66
  67
  68
  69 /*
  70  * wrap up an HTTP session, closes tags, etc.
  71  *
  72  * print_standard_html_footer should be set to:
  73  * 0            - to transmit only,
  74  * nonzero      - to append the closing tags
  75  */
  76 void wDumpContent(int print_standard_html_footer)
  77 {
  78         if (print_standard_html_footer) {
  79                 wprintf("</div> <!-- end of 'content' div -->\n");
  80                 do_template("trailing", NULL);
  81         }
  82
  83         /* If we've been saving it all up for one big output burst,
  84          * go ahead and do that now.
  85          */
  86         end_burst();
  87 }
  88
  89
  90
  91
  92 /*
  93  * Output HTTP headers and leading HTML for a page
  94  */
  95 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
  96                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
  97
  98                         int do_room_banner,     /* 0=no, 1=yes,
  99                                                  * 2 = I'm going to embed my own, so don't open the
 100                                                  *     <div id="content"> either.
 101                                                  */
 102
 103                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 104                         int suppress_check,     /* 1 = suppress check for instant messages          */
 105                         int cache               /* 1 = allow browser to cache this page             */
 106 ) {
 107         wcsession *WCC = WC;
 108         char cookie[1024];
 109         char httpnow[128];
 110
 111         hprintf("HTTP/1.1 200 OK\n");
 112         http_datestring(httpnow, sizeof httpnow, time(NULL));
 113
 114         if (do_httpheaders) {
 115                 if (WCC->serv_info != NULL)
 116                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 117                                 "Server: %s / %s\n"
 118                                 "Connection: close\r\n",
 119                                 PACKAGE_STRING,
 120                                 ChrPtr(WCC->serv_info->serv_software));
 121                 else
 122                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 123                                 "Server: %s / [n/a]\n"
 124                                 "Connection: close\r\n",
 125                                 PACKAGE_STRING);
 126         }
 127
 128         if (cache) {
 129                 char httpTomorow[128];
 130
 131                 http_datestring(httpTomorow, sizeof httpTomorow,
 132                                 time(NULL) + 60 * 60 * 24 * 2);
 133
 134                 hprintf("Pragma: public\r\n"
 135                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 136                         "Last-modified: %s\r\n"
 137                         "Expires: %s\r\n",
 138                         httpnow,
 139                         httpTomorow
 140                 );
 141         }
 142         else {
 143                 hprintf("Pragma: no-cache\r\n"
 144                         "Cache-Control: no-store\r\n"
 145                         "Expires: -1\r\n"
 146                 );
 147         }
 148
 149         stuff_to_cookie(cookie, 1024,
 150                         WCC->wc_session, WCC->wc_username,
 151                         WCC->wc_password, WCC->wc_roomname);
 152
 153         if (unset_cookies) {
 154                 hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 155         } else {
 156                 hprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 157                 if (server_cookie != NULL) {
 158                         hprintf("%s\n", server_cookie);
 159                 }
 160         }
 161
 162         if (do_htmlhead) {
 163                 begin_burst();
 164                 do_template("head", NULL);
 165
 166                 /* check for ImportantMessages (these display in a div overlaying the main screen) */
 167                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 168                         wprintf("<div id=\"important_message\">\n"
 169                                 "<span class=\"imsg\">");
 170                         StrEscAppend(WCC->WBuf, NULL, WCC->ImportantMessage, 0, 0);
 171                         wprintf("</span><br />\n"
 172                                 "</div>\n"
 173                         );
 174                         StrBufAppendBufPlain(WCC->trailing_javascript,
 175                                              HKEY("setTimeout('hide_imsg_popup()', 5000);       \n"),
 176                                              0
 177                         );
 178                         WCC->ImportantMessage[0] = 0;
 179                 }
 180                 else if (StrLength(WCC->ImportantMsg) > 0) {
 181                         wprintf("<div id=\"important_message\">\n"
 182                                 "<span class=\"imsg\">");
 183                         StrEscAppend(WCC->WBuf, WCC->ImportantMsg, NULL, 0, 0);
 184                         wprintf("</span><br />\n"
 185                                 "</div>\n"
 186                         );
 187                         StrBufAppendBufPlain(WCC->trailing_javascript,
 188                                              HKEY("setTimeout('hide_imsg_popup()', 5000);       \n"),
 189                                              0
 190                         );
 191                         FlushStrBuf(WCC->ImportantMsg);
 192                 }
 193                 if ( (WCC->logged_in) && (!unset_cookies) ) {
 194                         /*DoTemplate(HKEY("iconbar"), NULL, &NoCtx);*/
 195                         page_popup();
 196                 }
 197
 198                 if (do_room_banner == 1) {
 199                         wprintf("<div id=\"banner\">\n");
 200                         embed_room_banner(NULL, navbar_default);
 201                         wprintf("</div>\n");
 202                 }
 203         }
 204
 205         if (do_room_banner == 1) {
 206                 wprintf("<div id=\"content\">\n");
 207         }
 208 }
 209
 210 void output_custom_content_header(const char *ctype) {
 211   hprintf("HTTP/1.1 200 OK\r\n");
 212   hprintf("Content-type: %s; charset=utf-8\r\n",ctype);
 213   hprintf("Server: %s / %s\r\n", PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software));
 214   hprintf("Connection: close\r\n");
 215 }
 216
 217
 218 /*
 219  * Generic function to do an HTTP redirect.  Easy and fun.
 220  */
 221 void http_redirect(const char *whichpage) {
 222         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 223         hprintf("Location: %s\r\n", whichpage);
 224         hprintf("URI: %s\r\n", whichpage);
 225         hprintf("Content-type: text/html; charset=utf-8\r\n");
 226         wprintf("<html><body>");
 227         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 228         wprintf("</body></html>\n");
 229         end_burst();
 230 }
 231
 232
 233
 234 /*
 235  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 236  */
 237 void http_transmit_thing(const char *content_type,
 238                          int is_static) {
 239
 240 #ifndef TECH_PREVIEW
 241         lprintf(9, "http_transmit_thing(%s)%s\n",
 242                 content_type,
 243                 (is_static ? " (static)" : "")
 244         );
 245 #endif
 246         output_headers(0, 0, 0, 0, 0, is_static);
 247
 248         hprintf("Content-type: %s\r\n"
 249                 "Server: %s\r\n"
 250                 "Connection: close\r\n",
 251                 content_type,
 252                 PACKAGE_STRING);
 253
 254         end_burst();
 255 }
 256
 257 /*
 258  * print menu box like used in the floor view or admin interface.
 259  * This function takes pair of strings as va_args,
 260  * Title        Title string of the box
 261  * Class        CSS Class for the box
 262  * nLines       How many string pairs should we print? (URL, UrlText)
 263  * ...          Pairs of URL Strings and their Names
 264  */
 265 void print_menu_box(char* Title, char *Class, int nLines, ...)
 266 {
 267         va_list arg_list;
 268         long i;
 269
 270         svput("BOXTITLE", WCS_STRING, Title);
 271         do_template("beginboxx", NULL);
 272
 273         wprintf("<ul class=\"%s\">", Class);
 274
 275         va_start(arg_list, nLines);
 276         for (i = 0; i < nLines; ++i)
 277         {
 278                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 279                 wprintf((char *) va_arg(arg_list, char *));
 280                 wprintf("</a></li>\n");
 281         }
 282         va_end (arg_list);
 283
 284         wprintf("</a></li>\n");
 285
 286         wprintf("</ul>");
 287
 288         do_template("endbox", NULL);
 289 }
 290
 291
 292
 293 /*
 294  * Convenience functions to display a page containing only a string
 295  *
 296  * titlebarcolor        color of the titlebar of the frame
 297  * titlebarmsg          text to display in the title bar
 298  * messagetext          body of the box
 299  */
 300 void convenience_page(const char *titlebarcolor, const char *titlebarmsg, const char *messagetext)
 301 {
 302         hprintf("HTTP/1.1 200 OK\n");
 303         output_headers(1, 1, 2, 0, 0, 0);
 304         wprintf("<div id=\"banner\">\n");
 305         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 306         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 307         wprintf("</td></tr></table>\n");
 308         wprintf("</div>\n<div id=\"content\">\n");
 309         escputs(messagetext);
 310
 311         wprintf("<hr />\n");
 312         wDumpContent(1);
 313 }
 314
 315
 316 /*
 317  * Display a blank page.
 318  */
 319 void blank_page(void) {
 320         output_headers(1, 1, 0, 0, 0, 0);
 321         wDumpContent(2);
 322 }
 323
 324
 325 /*
 326  * A template has been requested
 327  */
 328 void url_do_template(void) {
 329         const StrBuf *MimeType;
 330         const StrBuf *Tmpl = sbstr("template");
 331         begin_burst();
 332         MimeType = DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 333         http_transmit_thing(ChrPtr(MimeType), 0);
 334 }
 335
 336
 337
 338 /*
 339  * convenience function to indicate success
 340  */
 341 void display_success(char *successmessage)
 342 {
 343         convenience_page("007700", "OK", successmessage);
 344 }
 345
 346
 347 /*
 348  * Authorization required page
 349  * This is probably temporary and should be revisited
 350  */
 351 void authorization_required(const char *message)
 352 {
 353         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 354         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(WC->serv_info->serv_humannode));
 355         hprintf("Content-Type: text/html\r\n");
 356         wprintf("<h1>");
 357         wprintf(_("Authorization Required"));
 358         wprintf("</h1>\r\n");
 359         wprintf(_("The resource you requested requires a valid username and password. "
 360                 "You could not be logged in: %s\n"), message);
 361         wDumpContent(0);
 362
 363 }
 364
 365 /*
 366  * Convenience functions to wrap around asynchronous ajax responses
 367  */
 368 void begin_ajax_response(void) {
 369         wcsession *WCC = WC;
 370
 371         FlushStrBuf(WCC->HBuf);
 372         output_headers(0, 0, 0, 0, 0, 0);
 373
 374         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 375                 "Server: %s\r\n"
 376                 "Connection: close\r\n"
 377                 ,
 378                 PACKAGE_STRING);
 379         begin_burst();
 380 }
 381
 382 /*
 383  * print ajax response footer
 384  */
 385 void end_ajax_response(void) {
 386         wDumpContent(0);
 387 }
 388
 389         /* If it's a "force 404" situation then display the error and bail. */
 390 void do_404(void)
 391 {
 392         hprintf("HTTP/1.1 404 Not found\r\n");
 393         hprintf("Content-Type: text/plain\r\n");
 394         wprintf("Not found\r\n");
 395         end_burst();
 396 }
 397
 398
 399 /*
 400  * Wraps a Citadel server command in an AJAX transaction.
 401  */
 402 void ajax_servcmd(void)
 403 {
 404         wcsession *WCC = WC;
 405         int Done = 0;
 406         StrBuf *Buf;
 407         char *junk;
 408         size_t len;
 409
 410         begin_ajax_response();
 411         Buf = NewStrBuf();
 412         serv_puts(bstr("g_cmd"));
 413         StrBuf_ServGetln(Buf);
 414         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 415         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 416
 417         switch (GetServerStatus(Buf, NULL)) {
 418         case 8:
 419                 serv_puts("\n\n000");
 420                 if ( (StrLength(Buf)==3) &&
 421                      !strcmp(ChrPtr(Buf), "000")) {
 422                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\000"), 0);
 423                         break;
 424                 }
 425         case 1:
 426                 while (!Done) {
 427                         StrBuf_ServGetln(Buf);
 428                         if ( (StrLength(Buf)==3) &&
 429                              !strcmp(ChrPtr(Buf), "000")) {
 430                                 Done = 1;
 431                         }
 432                         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 433                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 434                 }
 435                 break;
 436         case 4:
 437                 text_to_server(bstr("g_input"));
 438                 serv_puts("000");
 439                 break;
 440         case 6:
 441                 len = atol(&ChrPtr(Buf)[4]);
 442                 StrBuf_ServGetBLOBBuffered(Buf, len);
 443                 break;
 444         case 7:
 445                 len = atol(&ChrPtr(Buf)[4]);
 446                 junk = malloc(len);
 447                 memset(junk, 0, len);
 448                 serv_write(junk, len);
 449                 free(junk);
 450         }
 451
 452         end_ajax_response();
 453
 454         /*
 455          * This is kind of an ugly hack, but this is the only place it can go.
 456          * If the command was GEXP, then the instant messenger window must be
 457          * running, so reset the "last_pager_check" watchdog timer so
 458          * that page_popup() doesn't try to open it a second time.
 459          */
 460         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 461                 WCC->last_pager_check = time(NULL);
 462         }
 463         FreeStrBuf(&Buf);
 464 }
 465
 466
 467 /*
 468  * Helper function for the asynchronous check to see if we need
 469  * to open the instant messenger window.
 470  */
 471 void seconds_since_last_gexp(void)
 472 {
 473         char buf[256];
 474
 475         if ( (time(NULL) - WC->last_pager_check) < 30) {
 476                 wprintf("NO\n");
 477         }
 478         else {
 479                 memset(buf, 0, 5);
 480                 serv_puts("NOOP");
 481                 serv_getln(buf, sizeof buf);
 482                 if (buf[3] == '*') {
 483                         wprintf("YES");
 484                 }
 485                 else {
 486                         wprintf("NO");
 487                 }
 488         }
 489 }
 490
 491
 492
 493 void ReadPostData(void)
 494 {
 495         const char *content_end = NULL;
 496         int body_start = 0;
 497         wcsession *WCC = WC;
 498         StrBuf *content = NULL;
 499
 500         content = NewStrBuf();
 501
 502         StrBufPrintf(content,
 503                      "Content-type: %s\n"
 504                      "Content-length: %ld\n\n",
 505                      ChrPtr(WCC->Hdr->ContentType),
 506                              WCC->Hdr->ContentLength);
 507 /*
 508   hprintf("Content-type: %s\n"
 509   "Content-length: %d\n\n",
 510   ContentType, ContentLength);
 511 */
 512         body_start = StrLength(content);
 513
 514         /** Read the entire input data at once. */
 515         client_read_to(&WCC->Hdr->http_sock,
 516                        content,
 517                        WCC->Hdr->ReadBuf, &WCC->Hdr->Pos,
 518                        WCC->Hdr->ContentLength,
 519                        SLEEPING);
 520
 521         if (!strncasecmp(ChrPtr(WCC->Hdr->ContentType), "application/x-www-form-urlencoded", 33)) {
 522                 StrBufCutLeft(content, body_start);
 523                 ParseURLParams(content);
 524         } else if (!strncasecmp(ChrPtr(WCC->Hdr->ContentType), "multipart", 9)) {
 525                 content_end = ChrPtr(content) +
 526                         WCC->Hdr->ContentLength +
 527                         body_start;
 528                 mime_parser(ChrPtr(content), content_end, *upload_handler, NULL, NULL, NULL, 0);
 529         }
 530         FreeStrBuf(&content);
 531 }
 532
 533
 534 /*
 535  * Entry point for WebCit transaction
 536  */
 537 void session_loop(void)
 538 {
 539         int Flags = 0;
 540         int xhttp;
 541         StrBuf *Buf;
 542
 543         char buf[SIZ];
 544
 545         /*
 546          * We stuff these with the values coming from the client cookies,
 547          * so we can use them to reconnect a timed out session if we have to.
 548          */
 549         wcsession *WCC;
 550
 551
 552         Buf = NewStrBuf();
 553
 554         WCC= WC;
 555
 556         WCC->upload_length = 0;
 557         WCC->upload = NULL;
 558         WCC->is_mobile = 0;
 559         WCC->trailing_javascript = NewStrBuf();
 560         WCC->Hdr->nWildfireHeaders = 0;
 561         if (WCC->Hdr->Handler != NULL)
 562                 Flags = WCC->Hdr->Handler->Flags; /* so we can temporarily add our own... */
 563
 564         if (WCC->Hdr->ContentLength > 0) {
 565                 ReadPostData();
 566         }
 567
 568         /* If there are variables in the URL, we must grab them now */
 569         if (WCC->Hdr->PlainArgs != NULL)
 570                 ParseURLParams(WCC->Hdr->PlainArgs);
 571
 572         /* If the client sent a nonce that is incorrect, kill the request. */
 573         if (havebstr("nonce")) {
 574                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 575                         bstr("nonce"), WCC->nonce);
 576                 if (ibstr("nonce") != WCC->nonce) {
 577                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 578                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 579                         hprintf("Content-Type: text/plain\r\n\r\n");
 580                         wprintf("Security check failed.\r\n");
 581                         end_burst();
 582                         goto SKIP_ALL_THIS_CRAP;
 583                 }
 584         }
 585
 586         /*
 587          * If we're not connected to a Citadel server, try to hook up the
 588          * connection now.
 589          */
 590         if (!WCC->connected) {
 591                 if (GetConnected ())
 592                         goto SKIP_ALL_THIS_CRAP;
 593         }
 594
 595
 596         /*
 597          * If we're not logged in, but we have HTTP Authentication data,
 598          * try logging in to Citadel using that.
 599          */
 600         if ((!WCC->logged_in)
 601             && (StrLength(WCC->Hdr->c_username) > 0)
 602             && (StrLength(WCC->Hdr->c_password) > 0))
 603         {
 604                 FlushStrBuf(Buf);
 605                 serv_printf("USER %s", ChrPtr(WCC->Hdr->c_username));
 606                 StrBuf_ServGetln(Buf);
 607                 if (GetServerStatus(Buf, NULL) == 3) {
 608                         serv_printf("PASS %s", ChrPtr(WCC->Hdr->c_password));
 609                         StrBuf_ServGetln(Buf);
 610                         if (GetServerStatus(Buf, NULL) == 2) {
 611                                 become_logged_in(WCC->Hdr->c_username,
 612                                                  WCC->Hdr->c_password, Buf);
 613                         } else {
 614                                 /* Should only display when password is wrong */
 615                                 authorization_required(&buf[4]);
 616                                 FreeStrBuf(&Buf);
 617                                 goto SKIP_ALL_THIS_CRAP;
 618                         }
 619                 }
 620         }
 621
 622         xhttp = (WCC->Hdr->eReqType != eGET) &&
 623                 (WCC->Hdr->eReqType != ePOST) &&
 624                 (WCC->Hdr->eReqType != eHEAD);
 625
 626         /*
 627          * If we're not logged in, but we have username and password cookies
 628          * supplied by the browser, try using them to log in.
 629          */
 630         if ((!WCC->logged_in)
 631            && (StrLength(WCC->Hdr->c_username)>0)
 632            && (StrLength(WCC->Hdr->c_password)>0)) {
 633                 ReEstablish_Session();
 634         }
 635
 636         /*
 637          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 638          * prior to doing anything else.
 639          */
 640         if (havebstr("gotofirst")) {
 641                 int ret;
 642                 ret = gotoroom(sbstr("gotofirst"));     /* do this quietly to avoid session output! */
 643                 if (ret != 0)
 644                         lprintf(1, "GOTOFIRST: Unable to change to [%s]; Reason: %d\n", bstr("gotofirst"), ret);
 645         }
 646
 647         if (WCC->Hdr->Handler != NULL) {
 648                 if (!WCC->logged_in && ((WCC->Hdr->Handler->Flags & ANONYMOUS) == 0)) {
 649                         display_login(NULL);
 650                 }
 651                 else {
 652                         if ((WCC->Hdr->Handler->Flags & AJAX) != 0)
 653                                 begin_ajax_response();
 654                         WCC->Hdr->Handler->F();
 655                         if ((WCC->Hdr->Handler->Flags & AJAX) != 0)
 656                                 end_ajax_response();
 657                 }
 658         }
 659         /* When all else fais, display the main menu. */
 660         else {
 661                 if (!WCC->logged_in)
 662                         display_login(NULL);
 663                 else
 664                         display_main_menu();
 665         }
 666
 667 SKIP_ALL_THIS_CRAP:
 668         if (WCC->SavePrefsToServer) {
 669                 save_preferences();
 670                 WCC->SavePrefsToServer = 0;
 671         }
 672         FreeStrBuf(&Buf);
 673         fflush(stdout);
 674         WCC->Hdr->http_host = NULL;
 675 }
 676
 677
 678 /*
 679  * Replacement for sleep() that uses select() in order to avoid SIGALRM
 680  */
 681 void sleeeeeeeeeep(int seconds)
 682 {
 683         struct timeval tv;
 684
 685         tv.tv_sec = seconds;
 686         tv.tv_usec = 0;
 687         select(0, NULL, NULL, NULL, &tv);
 688 }
 689
 690
 691 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
 692 {
 693         wcsession *WCC = WC;
 694         if (WCC != NULL)
 695                 return ((!IsEmptyStr(WCC->ImportantMessage)) ||
 696                         (StrLength(WCC->ImportantMsg) > 0));
 697         else
 698                 return 0;
 699 }
 700
 701 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
 702 {
 703         wcsession *WCC = WC;
 704
 705         if (WCC != NULL) {
 706                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 707                         StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
 708                         WCC->ImportantMessage[0] = '\0';
 709                 }
 710                 else if (StrLength(WCC->ImportantMsg) > 0) {
 711                         StrEscAppend(Target, WCC->ImportantMsg, NULL, 0, 0);
 712                         FlushStrBuf(WCC->ImportantMsg);
 713                 }
 714         }
 715 }
 716
 717 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
 718 {
 719         wcsession *WCC = WC;
 720
 721         if (WCC != NULL)
 722                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
 723 }
 724
 725 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
 726 {
 727         StrBufAppendBuf(Target,
 728                         csslocal, 0);
 729 }
 730
 731 extern char static_local_dir[PATH_MAX];
 732
 733
 734 void
 735 InitModule_WEBCIT
 736 (void)
 737 {
 738         char dir[SIZ];
 739         WebcitAddUrlHandler(HKEY("404"), do_404, ANONYMOUS|COOKIEUNNEEDED);
 740         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 741
 742
 743         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS);
 744         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
 745         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX|LOGCHATTY);
 746         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
 747
 748         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
 749         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, CTX_NONE);
 750         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
 751         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, CTX_NONE);
 752
 753         snprintf(dir, SIZ, "%s/static.local/webcit.css", static_local_dir);
 754         if (!access(dir, R_OK)) {
 755                 lprintf(9, "Using local Stylesheet [%s]\n", dir);
 756                 csslocal = NewStrBufPlain(HKEY("<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\">"));
 757         }
 758         else
 759                 lprintf(9, "Didn't find site local Stylesheet [%s]\n", dir);
 760
 761 }
 762
 763 void
 764 ServerStartModule_WEBCIT
 765 (void)
 766 {
 767         HandlerHash = NewHash(1, NULL);
 768 }
 769
 770
 771 void
 772 ServerShutdownModule_WEBCIT
 773 (void)
 774 {
 775         FreeStrBuf(&csslocal);
 776         DeleteHash(&HandlerHash);
 777 }
 778
 779
 780
 781 void
 782 SessionNewModule_WEBCIT
 783 (wcsession *sess)
 784 {
 785         sess->ImportantMsg = NewStrBuf();
 786         sess->WBuf = NewStrBuf();
 787         sess->HBuf = NewStrBuf();
 788 }
 789
 790 void
 791 SessionDetachModule_WEBCIT
 792 (wcsession *sess)
 793 {
 794         DeleteHash(&sess->Hdr->urlstrings);// TODO?
 795         if (sess->upload_length > 0) {
 796                 free(sess->upload);
 797                 sess->upload_length = 0;
 798         }
 799         FreeStrBuf(&sess->trailing_javascript);
 800
 801         if (StrLength(sess->WBuf) > SIZ * 30) /* Bigger than 120K? release. */
 802         {
 803                 FreeStrBuf(&sess->WBuf);
 804                 sess->WBuf = NewStrBuf();
 805         }
 806         else
 807                 FlushStrBuf(sess->WBuf);
 808         FlushStrBuf(sess->HBuf);
 809 }
 810
 811 void
 812 SessionDestroyModule_WEBCIT
 813 (wcsession *sess)
 814 {
 815         FreeStrBuf(&sess->WBuf);
 816         FreeStrBuf(&sess->HBuf);
 817         FreeStrBuf(&sess->ImportantMsg);
 818 }
 819