webcit/webcit.c

   1 /*
   2  * This is the main transaction loop of the web service.  It maintains a
   3  * persistent session to the Citadel server, handling HTTP WebCit requests as
   4  * they arrive and presenting a user interface.
   5  *
   6  * Copyright (c) 1996-2010 by the citadel.org team
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #define SHOW_ME_VAPPEND_PRINTF
  24 #include <stdio.h>
  25 #include <stdarg.h>
  26 #include "webcit.h"
  27 #include "groupdav.h"
  28 #include "webserver.h"
  29
  30
  31 StrBuf *csslocal = NULL;
  32 HashList *HandlerHash = NULL;
  33
  34
  35 void DeleteWebcitHandler(void *vHandler)
  36 {
  37         WebcitHandler *Handler = (WebcitHandler*) vHandler;
  38         FreeStrBuf(&Handler->Name);
  39         FreeStrBuf(&Handler->DisplayName);
  40         free (Handler);
  41 }
  42
  43 void WebcitAddUrlHandler(const char * UrlString, long UrlSLen,
  44                          const char *DisplayName, long dslen,
  45                          WebcitHandlerFunc F,
  46                          long Flags)
  47 {
  48         WebcitHandler *NewHandler;
  49         NewHandler = (WebcitHandler*) malloc(sizeof(WebcitHandler));
  50         NewHandler->F = F;
  51         NewHandler->Flags = Flags;
  52         NewHandler->Name = NewStrBufPlain(UrlString, UrlSLen);
  53         StrBufShrinkToFit(NewHandler->Name, 1);
  54         NewHandler->DisplayName = NewStrBufPlain(DisplayName, dslen);
  55         StrBufShrinkToFit(NewHandler->DisplayName, 1);
  56         Put(HandlerHash, UrlString, UrlSLen, NewHandler, DeleteWebcitHandler);
  57 }
  58
  59 void tmplput_HANDLER_DISPLAYNAME(StrBuf *Target, WCTemplputParams *TP)
  60 {
  61         wcsession *WCC = WC;
  62         if (WCC->Hdr->HR.Handler != NULL)
  63                 StrBufAppendTemplate(Target, TP, WCC->Hdr->HR.Handler->DisplayName, 0);
  64 }
  65
  66
  67 /*
  68  * web-printing funcion. uses our vsnprintf wrapper
  69  */
  70 #ifdef UBER_VERBOSE_DEBUGGING
  71 void wcc_printf(const char *FILE, const char *FUNCTION, long LINE, const char *format,...)
  72 #else
  73 void wc_printf(const char *format,...)
  74 #endif
  75 {
  76         wcsession *WCC = WC;
  77         va_list arg_ptr;
  78
  79         if (WCC->WBuf == NULL)
  80                 WCC->WBuf = NewStrBuf();
  81 #ifdef UBER_VERBOSE_DEBUGGING
  82         StrBufAppendPrintf(WCC->WBuf, "\n%s:%s:%d[", FILE, FUNCTION, LINE);
  83 #endif
  84
  85         va_start(arg_ptr, format);
  86         StrBufVAppendPrintf(WCC->WBuf, format, arg_ptr);
  87         va_end(arg_ptr);
  88 #ifdef UBER_VERBOSE_DEBUGGING
  89         StrBufAppendPrintf(WCC->WBuf, "]\n");
  90 #endif
  91 }
  92
  93 /*
  94  * http-header-printing funcion. uses our vsnprintf wrapper
  95  */
  96 void hprintf(const char *format,...)
  97 {
  98         wcsession *WCC = WC;
  99         va_list arg_ptr;
 100
 101         va_start(arg_ptr, format);
 102         StrBufVAppendPrintf(WCC->HBuf, format, arg_ptr);
 103         va_end(arg_ptr);
 104 }
 105
 106
 107
 108 /*
 109  * wrap up an HTTP session, closes tags, etc.
 110  *
 111  * print_standard_html_footer should be set to:
 112  * 0            - to transmit only,
 113  * nonzero      - to append the closing tags
 114  */
 115 void wDumpContent(int print_standard_html_footer)
 116 {
 117         if (print_standard_html_footer) {
 118                 wc_printf("</div> <!-- end of 'content' div -->\n");
 119                 do_template("trailing", NULL);
 120         }
 121
 122         /* If we've been saving it all up for one big output burst,
 123          * go ahead and do that now.
 124          */
 125         end_burst();
 126 }
 127
 128
 129
 130
 131 /*
 132  * Output HTTP headers and leading HTML for a page
 133  */
 134 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                        */
 135                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 136
 137                         int do_room_banner,     /* 0=no, 1=yes,
 138                                                  * 2 = I'm going to embed my own, so don't open the
 139                                                  *     <div id="content"> either.
 140                                                  */
 141
 142                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 143                         int suppress_check,     /* 1 = suppress check for instant messages        */
 144                         int cache               /* 1 = allow browser to cache this page      */
 145 ) {
 146         wcsession *WCC = WC;
 147         char httpnow[128];
 148
 149         hprintf("HTTP/1.1 200 OK\n");
 150         http_datestring(httpnow, sizeof httpnow, time(NULL));
 151
 152         if (do_httpheaders) {
 153                 if (WCC->serv_info != NULL)
 154                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 155                                 "Server: %s / %s\n"
 156                                 "Connection: close\r\n",
 157                                 PACKAGE_STRING,
 158                                 ChrPtr(WCC->serv_info->serv_software));
 159                 else
 160                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 161                                 "Server: %s / [n/a]\n"
 162                                 "Connection: close\r\n",
 163                                 PACKAGE_STRING);
 164         }
 165
 166         if (cache > 0) {
 167                 char httpTomorow[128];
 168
 169                 http_datestring(httpTomorow, sizeof httpTomorow,
 170                                 time(NULL) + 60 * 60 * 24 * 2);
 171
 172                 hprintf("Pragma: public\r\n"
 173                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 174                         "Last-modified: %s\r\n"
 175                         "Expires: %s\r\n",
 176                         httpnow,
 177                         httpTomorow
 178                 );
 179         }
 180         else {
 181                 hprintf("Pragma: no-cache\r\n"
 182                         "Cache-Control: no-store\r\n"
 183                         "Expires: -1\r\n"
 184                 );
 185         }
 186
 187         if (cache < 2) stuff_to_cookie(unset_cookies);
 188
 189         if (do_htmlhead) {
 190                 begin_burst();
 191                 do_template("head", NULL);
 192
 193                 /* check for ImportantMessages (these display in a div overlaying the main screen) */
 194                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 195                         wc_printf("<div id=\"important_message\">\n"
 196                                 "<span class=\"imsg\">");
 197                         StrEscAppend(WCC->WBuf, NULL, WCC->ImportantMessage, 0, 0);
 198                         wc_printf("</span><br />\n"
 199                                 "</div>\n"
 200                         );
 201                         StrBufAppendBufPlain(WCC->trailing_javascript,
 202                                              HKEY("setTimeout('hide_imsg_popup()', 5000);       \n"),
 203                                              0
 204                         );
 205                         WCC->ImportantMessage[0] = 0;
 206                 }
 207                 else if (StrLength(WCC->ImportantMsg) > 0) {
 208                         wc_printf("<div id=\"important_message\">\n"
 209                                 "<span class=\"imsg\">");
 210                         StrEscAppend(WCC->WBuf, WCC->ImportantMsg, NULL, 0, 0);
 211                         wc_printf("</span><br />\n"
 212                                 "</div>\n"
 213                         );
 214                         StrBufAppendBufPlain(WCC->trailing_javascript,
 215                                              HKEY("setTimeout('hide_imsg_popup()', 5000);       \n"),
 216                                              0
 217                         );
 218                         FlushStrBuf(WCC->ImportantMsg);
 219                 }
 220                 if ( (WCC->logged_in) && (!unset_cookies) ) {
 221                         DoTemplate(HKEY("paging"), NULL, &NoCtx);
 222                 }
 223
 224                 if (do_room_banner == 1) {
 225                         tmplput_roombanner(NULL, NULL);
 226                 }
 227         }
 228
 229         if (do_room_banner == 1) {
 230                 wc_printf("<div id=\"content\">\n");
 231         }
 232 }
 233
 234 void output_custom_content_header(const char *ctype) {
 235   hprintf("HTTP/1.1 200 OK\r\n");
 236   hprintf("Content-type: %s; charset=utf-8\r\n",ctype);
 237   hprintf("Server: %s / %s\r\n", PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software));
 238   hprintf("Connection: close\r\n");
 239 }
 240
 241
 242 /*
 243  * Generic function to do an HTTP redirect.  Easy and fun.
 244  */
 245 void http_redirect(const char *whichpage) {
 246         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 247         hprintf("Location: %s\r\n", whichpage);
 248         hprintf("URI: %s\r\n", whichpage);
 249         hprintf("Content-type: text/html; charset=utf-8\r\n");
 250         begin_burst();
 251         wc_printf("<html><body>");
 252         wc_printf("Go <a href=\"%s\">here</A>.", whichpage);
 253         wc_printf("</body></html>\n");
 254         end_burst();
 255 }
 256
 257
 258
 259 /*
 260  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 261  */
 262 void http_transmit_thing(const char *content_type,
 263                          int is_static) {
 264
 265 #ifndef TECH_PREVIEW
 266         lprintf(9, "http_transmit_thing(%s)%s\n",
 267                 content_type,
 268                 ((is_static > 0) ? " (static)" : "")
 269         );
 270 #endif
 271         output_headers(0, 0, 0, 0, 0, is_static);
 272
 273         hprintf("Content-type: %s\r\n"
 274                 "Server: %s\r\n"
 275                 "Connection: close\r\n",
 276                 content_type,
 277                 PACKAGE_STRING);
 278
 279         end_burst();
 280 }
 281
 282
 283 /*
 284  * Convenience functions to display a page containing only a string
 285  *
 286  * titlebarcolor        color of the titlebar of the frame
 287  * titlebarmsg          text to display in the title bar
 288  * messagetext          body of the box
 289  */
 290 void convenience_page(const char *titlebarcolor, const char *titlebarmsg, const char *messagetext)
 291 {
 292         hprintf("HTTP/1.1 200 OK\n");
 293         output_headers(1, 1, 2, 0, 0, 0);
 294         wc_printf("<div id=\"banner\">\n");
 295         wc_printf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 296         wc_printf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 297         wc_printf("</td></tr></table>\n");
 298         wc_printf("</div>\n<div id=\"content\">\n");
 299         escputs(messagetext);
 300
 301         wc_printf("<hr />\n");
 302         wDumpContent(1);
 303 }
 304
 305
 306 /*
 307  * Display a blank page.
 308  */
 309 void blank_page(void) {
 310         output_headers(1, 1, 0, 0, 0, 0);
 311         wDumpContent(2);
 312 }
 313
 314
 315 /*
 316  * A template has been requested
 317  */
 318 void url_do_template(void) {
 319         const StrBuf *MimeType;
 320         const StrBuf *Tmpl = sbstr("template");
 321         begin_burst();
 322         MimeType = DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 323         http_transmit_thing(ChrPtr(MimeType), 0);
 324 }
 325
 326
 327
 328 /*
 329  * convenience function to indicate success
 330  */
 331 void display_success(char *successmessage)
 332 {
 333         convenience_page("007700", "OK", successmessage);
 334 }
 335
 336
 337 /*
 338  * Authorization required page
 339  * This is probably temporary and should be revisited
 340  */
 341 void authorization_required(void)
 342 {
 343         wcsession *WCC = WC;
 344         const char *message = "";
 345
 346         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 347         hprintf(
 348                 "Server: %s / %s\r\n"
 349                 "Connection: close\r\n",
 350                 PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software)
 351         );
 352         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(WC->serv_info->serv_humannode));
 353         hprintf("Content-Type: text/html\r\n");
 354         begin_burst();
 355         wc_printf("<h1>");
 356         wc_printf(_("Authorization Required"));
 357         wc_printf("</h1>\r\n");
 358
 359
 360         if (WCC->ImportantMsg != NULL)
 361                 message = ChrPtr(WCC->ImportantMsg);
 362         else if (WCC->ImportantMessage != NULL)
 363                 message = WCC->ImportantMessage;
 364
 365         wc_printf(_("The resource you requested requires a valid username and password. "
 366                 "You could not be logged in: %s\n"), message);
 367         wDumpContent(0);
 368         end_webcit_session();
 369 }
 370
 371 /*
 372  * Convenience functions to wrap around asynchronous ajax responses
 373  */
 374 void begin_ajax_response(void) {
 375         wcsession *WCC = WC;
 376
 377         FlushStrBuf(WCC->HBuf);
 378         output_headers(0, 0, 0, 0, 0, 0);
 379
 380         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 381                 "Server: %s\r\n"
 382                 "Connection: close\r\n"
 383                 ,
 384                 PACKAGE_STRING);
 385         begin_burst();
 386 }
 387
 388 /*
 389  * print ajax response footer
 390  */
 391 void end_ajax_response(void) {
 392         wDumpContent(0);
 393 }
 394
 395
 396
 397 /*
 398  * Wraps a Citadel server command in an AJAX transaction.
 399  */
 400 void ajax_servcmd(void)
 401 {
 402         wcsession *WCC = WC;
 403         int Done = 0;
 404         StrBuf *Buf;
 405         char *junk;
 406         size_t len;
 407
 408         begin_ajax_response();
 409         Buf = NewStrBuf();
 410         serv_puts(bstr("g_cmd"));
 411         StrBuf_ServGetln(Buf);
 412         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 413         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 414
 415         switch (GetServerStatus(Buf, NULL)) {
 416         case 8:
 417                 serv_puts("\n\n000");
 418                 if ( (StrLength(Buf)==3) &&
 419                      !strcmp(ChrPtr(Buf), "000")) {
 420                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\000"), 0);
 421                         break;
 422                 }
 423         case 1:
 424                 while (!Done) {
 425                         StrBuf_ServGetln(Buf);
 426                         if ( (StrLength(Buf)==3) &&
 427                              !strcmp(ChrPtr(Buf), "000")) {
 428                                 Done = 1;
 429                         }
 430                         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 431                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 432                 }
 433                 break;
 434         case 4:
 435                 text_to_server(bstr("g_input"));
 436                 serv_puts("000");
 437                 break;
 438         case 6:
 439                 len = atol(&ChrPtr(Buf)[4]);
 440                 StrBuf_ServGetBLOBBuffered(Buf, len);
 441                 break;
 442         case 7:
 443                 len = atol(&ChrPtr(Buf)[4]);
 444                 junk = malloc(len);
 445                 memset(junk, 0, len);
 446                 serv_write(junk, len);
 447                 free(junk);
 448         }
 449
 450         end_ajax_response();
 451
 452         /*
 453          * This is kind of an ugly hack, but this is the only place it can go.
 454          * If the command was GEXP, then the instant messenger window must be
 455          * running, so reset the "last_pager_check" watchdog timer so
 456          * that page_popup() doesn't try to open it a second time.
 457          */
 458         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 459                 WCC->last_pager_check = time(NULL);
 460         }
 461         FreeStrBuf(&Buf);
 462 }
 463
 464
 465 /*
 466  * Helper function for the asynchronous check to see if we need
 467  * to open the instant messenger window.
 468  */
 469 void seconds_since_last_gexp(void)
 470 {
 471         char buf[256];
 472
 473         if ( (time(NULL) - WC->last_pager_check) < 30) {
 474                 wc_printf("NO\n");
 475         }
 476         else {
 477                 memset(buf, 0, 5);
 478                 serv_puts("NOOP");
 479                 serv_getln(buf, sizeof buf);
 480                 if (buf[3] == '*') {
 481                         wc_printf("YES");
 482                 }
 483                 else {
 484                         wc_printf("NO");
 485                 }
 486         }
 487 }
 488
 489
 490
 491 int ReadPostData(void)
 492 {
 493         int rc;
 494         int body_start = 0;
 495         wcsession *WCC = WC;
 496         StrBuf *content = NULL;
 497
 498         content = NewStrBufPlain(NULL, WCC->Hdr->HR.ContentLength + 256);
 499
 500         StrBufPrintf(content,
 501                      "Content-type: %s\n"
 502                      "Content-length: %ld\n\n",
 503                      ChrPtr(WCC->Hdr->HR.ContentType),
 504                              WCC->Hdr->HR.ContentLength);
 505 /*
 506   hprintf("Content-type: %s\n"
 507   "Content-length: %d\n\n",
 508   ContentType, ContentLength);
 509 */
 510         body_start = StrLength(content);
 511
 512         /** Read the entire input data at once. */
 513         rc = client_read_to(WCC->Hdr, content,
 514                             WCC->Hdr->HR.ContentLength,
 515                             SLEEPING);
 516         if (rc < 0)
 517                 return rc;
 518
 519
 520         if (!strncasecmp(ChrPtr(WCC->Hdr->HR.ContentType), "application/x-www-form-urlencoded", 33)) {
 521                 StrBufCutLeft(content, body_start);
 522                 ParseURLParams(content);
 523         } else if (!strncasecmp(ChrPtr(WCC->Hdr->HR.ContentType), "multipart", 9)) {
 524                 char *Buf;
 525                 char *BufEnd;
 526                 long len;
 527
 528                 len = StrLength(content);
 529                 Buf = SmashStrBuf(&content);
 530                 BufEnd = Buf + len;
 531                 mime_parser(Buf, BufEnd, *upload_handler, NULL, NULL, NULL, 0);
 532                 free(Buf);
 533         } else if (WCC->Hdr->HR.ContentLength > 0) {
 534                 WCC->upload = content;
 535                 WCC->upload_length = StrLength(WCC->upload);
 536                 content = NULL;
 537         }
 538         FreeStrBuf(&content);
 539         return 1;
 540 }
 541
 542
 543 void ParseREST_URL(void)
 544 {
 545         StrBuf *Buf;
 546         StrBuf *pFloor = NULL;
 547         wcsession *WCC = WC;
 548         long i = 0;
 549         const char *pCh = NULL;
 550         HashList *Floors;
 551         void *vFloor;
 552
 553         lprintf(1, "parsing rest URL: %s\n", ChrPtr(WCC->Hdr->HR.ReqLine));
 554
 555         WCC->Directory = NewHash(1, Flathash);
 556         WCC->CurrentFloor = NULL;
 557
 558         Buf = NewStrBuf();
 559         while (StrBufExtract_NextToken(Buf, WCC->Hdr->HR.ReqLine, &pCh,  '/') >= 0)
 560         {
 561                 if (StrLength(Buf) != 0) {
 562                         /* ignore empty path segments */
 563                         StrBufUnescape(Buf, 1);
 564                         Put(WCC->Directory, IKEY(i), Buf, HFreeStrBuf);
 565                         if (i==0)
 566                                 pFloor = Buf;
 567                         Buf = NewStrBuf();
 568                 }
 569                 i++;
 570         }
 571
 572         FreeStrBuf(&Buf);
 573         if (pFloor != NULL)
 574         {
 575                 Floors = GetFloorListHash(NULL, NULL);
 576
 577                 if (Floors != NULL)
 578                 {
 579                         if (GetHash(WCC->FloorsByName, SKEY(pFloor), &vFloor))
 580                                 WCC->CurrentFloor = (Floor*) vFloor;
 581                 }
 582         }
 583 }
 584
 585 int Conditional_REST_DEPTH(StrBuf *Target, WCTemplputParams *TP)
 586 {
 587         long Depth, IsDepth;
 588         long offset = 0;
 589         wcsession *WCC = WC;
 590
 591         if (WCC->Hdr->HR.Handler != NULL)
 592                 offset ++;
 593         Depth = GetTemplateTokenNumber(Target, TP, 2, 0);
 594         IsDepth = GetCount(WCC->Directory) + offset;
 595
 596 //      LogTemplateError(Target, "bla", 1, TP, "REST_DEPTH: %ld : %ld\n", Depth, IsDepth);
 597         if (Depth < 0) {
 598                 Depth = -Depth;
 599                 return IsDepth > Depth;
 600         }
 601         else
 602                 return Depth == IsDepth;
 603 }
 604
 605
 606
 607 /*
 608  * Entry point for WebCit transaction
 609  */
 610 void session_loop(void)
 611 {
 612         int Flags = 0;
 613         int xhttp;
 614         StrBuf *Buf;
 615
 616         /*
 617          * We stuff these with the values coming from the client cookies,
 618          * so we can use them to reconnect a timed out session if we have to.
 619          */
 620         wcsession *WCC;
 621
 622         WCC= WC;
 623         WCC->upload_length = 0;
 624         WCC->upload = NULL;
 625         WCC->is_mobile = 0;
 626         WCC->Hdr->nWildfireHeaders = 0;
 627         if (WCC->Hdr->HR.Handler != NULL)
 628                 Flags = WCC->Hdr->HR.Handler->Flags; /* so we can temporarily add our own... */
 629
 630         if (WCC->Hdr->HR.ContentLength > 0) {
 631                 if (ReadPostData() < 0) {
 632                         return;
 633                 }
 634         }
 635
 636         Buf = NewStrBuf();
 637         WCC->trailing_javascript = NewStrBuf();
 638
 639         /* Convert base64-encoded URL's back to plain text */
 640         if (!strncmp(ChrPtr(WCC->Hdr->this_page), "/B64", 4)) {
 641                 StrBufCutLeft(WCC->Hdr->this_page, 4);
 642                 StrBufDecodeBase64(WCC->Hdr->this_page);
 643                 http_redirect(ChrPtr(WCC->Hdr->this_page));
 644                 goto SKIP_ALL_THIS_CRAP;
 645         }
 646
 647         /* If there are variables in the URL, we must grab them now */
 648         if (WCC->Hdr->PlainArgs != NULL)
 649                 ParseURLParams(WCC->Hdr->PlainArgs);
 650
 651         /* If the client sent a nonce that is incorrect, kill the request. */
 652         if (havebstr("nonce")) {
 653                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 654                         bstr("nonce"), WCC->nonce);
 655                 if (ibstr("nonce") != WCC->nonce) {
 656                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 657                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 658                         hprintf("Content-Type: text/plain\r\n");
 659                         begin_burst();
 660                         wc_printf("Security check failed.\r\n");
 661                         end_burst();
 662                         goto SKIP_ALL_THIS_CRAP;
 663                 }
 664         }
 665
 666         /*
 667          * If we're not connected to a Citadel server, try to hook up the
 668          * connection now.
 669          */
 670         if (!WCC->connected) {
 671                 if (GetConnected ())
 672                         goto SKIP_ALL_THIS_CRAP;
 673         }
 674
 675
 676         /*
 677          * If we're not logged in, but we have authentication data (either from
 678          * a cookie or from http-auth), try logging in to Citadel using that.
 679          */
 680         if ((!WCC->logged_in)
 681             && (StrLength(WCC->Hdr->c_username) > 0)
 682             && (StrLength(WCC->Hdr->c_password) > 0))
 683         {
 684                 long Status;
 685
 686                 FlushStrBuf(Buf);
 687                 serv_printf("USER %s", ChrPtr(WCC->Hdr->c_username));
 688                 StrBuf_ServGetln(Buf);
 689                 if (GetServerStatus(Buf, &Status) == 3) {
 690                         serv_printf("PASS %s", ChrPtr(WCC->Hdr->c_password));
 691                         StrBuf_ServGetln(Buf);
 692                         if (GetServerStatus(Buf, NULL) == 2) {
 693                                 become_logged_in(WCC->Hdr->c_username,
 694                                                  WCC->Hdr->c_password, Buf);
 695                         } else {
 696                                 /* Should only display when password is wrong */
 697                                 WCC->ImportantMsg = NewStrBufPlain(ChrPtr(Buf) + 4, StrLength(Buf) - 4);
 698                                 authorization_required();
 699                                 FreeStrBuf(&Buf);
 700                                 goto SKIP_ALL_THIS_CRAP;
 701                         }
 702                 }
 703                 else if (Status == 541) {
 704                         WCC->logged_in = 1;
 705                 }
 706         }
 707
 708         xhttp = (WCC->Hdr->HR.eReqType != eGET) &&
 709                 (WCC->Hdr->HR.eReqType != ePOST) &&
 710                 (WCC->Hdr->HR.eReqType != eHEAD);
 711
 712         /*
 713          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 714          * prior to doing anything else.
 715          */
 716         if (havebstr("gotofirst")) {
 717                 int ret;
 718                 ret = gotoroom(sbstr("gotofirst"));     /* do quietly to avoid session output! */
 719                 if ((ret/100) != 2) {
 720                         lprintf(1, "GOTOFIRST: Unable to change to [%s]; Reason: %d\n",
 721                                 bstr("gotofirst"), ret);
 722                 }
 723         }
 724
 725         /*
 726          * If we aren't in any room yet, but we have cookie data telling us where we're
 727          * supposed to be, and 'gotofirst' was not specified, then go there.
 728          */
 729         else if ( (StrLength(WCC->CurRoom.name) == 0) && ( (StrLength(WCC->Hdr->c_roomname) > 0) )) {
 730                 int ret;
 731
 732                 lprintf(9, "We are in '%s' but cookie indicates '%s', going there...\n",
 733                         ChrPtr(WCC->CurRoom.name),
 734                         ChrPtr(WCC->Hdr->c_roomname)
 735                 );
 736                 ret = gotoroom(WCC->Hdr->c_roomname);   /* do quietly to avoid session output! */
 737                 if ((ret/100) != 2) {
 738                         lprintf(1, "COOKIEGOTO: Unable to change to [%s]; Reason: %d\n",
 739                                 ChrPtr(WCC->Hdr->c_roomname), ret);
 740                 }
 741         }
 742
 743         if (WCC->Hdr->HR.Handler != NULL) {
 744                 if (!WCC->logged_in && ((WCC->Hdr->HR.Handler->Flags & ANONYMOUS) == 0)) {
 745                         display_login();
 746                 }
 747                 else {
 748 /*
 749                         if ((WCC->Hdr->HR.Handler->Flags & PARSE_REST_URL) != 0)
 750                                 ParseREST_URL();
 751 */
 752                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 753                                 begin_ajax_response();
 754                         WCC->Hdr->HR.Handler->F();
 755                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 756                                 end_ajax_response();
 757                 }
 758         }
 759         /* When all else fais, display the main menu. */
 760         else {
 761                 /*
 762                  * ordinary browser users get a nice login screen, DAV etc. requsets
 763                  * are given a 401 so they can handle it appropriate.
 764                  */
 765                 if (!WCC->logged_in)  {
 766                         if (xhttp)
 767                                 authorization_required();
 768                         else
 769                                 display_login();
 770                 }
 771                 /*
 772                  * Toplevel dav requests? or just a flat browser request?
 773                  */
 774                 else {
 775                         if (xhttp)
 776                                 groupdav_main();
 777                         else
 778                                 display_main_menu();
 779                 }
 780         }
 781
 782 SKIP_ALL_THIS_CRAP:
 783         FreeStrBuf(&Buf);
 784         fflush(stdout);
 785 }
 786
 787
 788 /*
 789  * Replacement for sleep() that uses select() in order to avoid SIGALRM
 790  */
 791 void sleeeeeeeeeep(int seconds)
 792 {
 793         struct timeval tv;
 794
 795         tv.tv_sec = seconds;
 796         tv.tv_usec = 0;
 797         select(0, NULL, NULL, NULL, &tv);
 798 }
 799
 800 int Conditional_IS_HTTPS(StrBuf *Target, WCTemplputParams *TP)
 801 {
 802         return is_https != 0;
 803 }
 804
 805 void AppendImportantMessage(const char *pch, long len)
 806 {
 807         wcsession *WCC = WC;
 808
 809         if (StrLength(WCC->ImportantMsg) > 0) {
 810                 StrBufAppendBufPlain(WCC->ImportantMsg, HKEY("\n"), 0);
 811         }
 812
 813         StrBufAppendBufPlain(WCC->ImportantMsg, pch, len, 0);
 814 }
 815
 816 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
 817 {
 818         wcsession *WCC = WC;
 819         if (WCC != NULL)
 820                 return ((!IsEmptyStr(WCC->ImportantMessage)) ||
 821                         (StrLength(WCC->ImportantMsg) > 0));
 822         else
 823                 return 0;
 824 }
 825
 826 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
 827 {
 828         wcsession *WCC = WC;
 829
 830         if (WCC != NULL) {
 831                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 832                         StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
 833                         WCC->ImportantMessage[0] = '\0';
 834                 }
 835                 else if (StrLength(WCC->ImportantMsg) > 0) {
 836                         StrEscAppend(Target, WCC->ImportantMsg, NULL, 0, 0);
 837                         FlushStrBuf(WCC->ImportantMsg);
 838                 }
 839         }
 840 }
 841
 842 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
 843 {
 844         wcsession *WCC = WC;
 845
 846         if (WCC != NULL)
 847                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
 848 }
 849
 850 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
 851 {
 852         StrBufAppendBuf(Target,
 853                         csslocal, 0);
 854 }
 855
 856 extern char static_local_dir[PATH_MAX];
 857
 858
 859 void
 860 InitModule_WEBCIT
 861 (void)
 862 {
 863         char dir[SIZ];
 864         WebcitAddUrlHandler(HKEY("blank"), "", 0, blank_page, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 865         WebcitAddUrlHandler(HKEY("do_template"), "", 0, url_do_template, ANONYMOUS);
 866         WebcitAddUrlHandler(HKEY("sslg"), "", 0, seconds_since_last_gexp, AJAX|LOGCHATTY);
 867         WebcitAddUrlHandler(HKEY("ajax_servcmd"), "", 0, ajax_servcmd, 0);
 868         WebcitAddUrlHandler(HKEY("webcit"), "", 0, blank_page, URLNAMESPACE);
 869
 870         WebcitAddUrlHandler(HKEY("401"), "", 0, authorization_required, ANONYMOUS|COOKIEUNNEEDED);
 871         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
 872         RegisterConditional(HKEY("COND:REST:DEPTH"), 0, Conditional_REST_DEPTH, CTX_NONE);
 873         RegisterConditional(HKEY("COND:IS_HTTPS"), 0, Conditional_IS_HTTPS, CTX_NONE);
 874
 875         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, NULL, CTX_NONE);
 876         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, NULL, CTX_NONE);
 877         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, NULL, CTX_NONE);
 878         RegisterNamespace("URL:DISPLAYNAME", 0, 1, tmplput_HANDLER_DISPLAYNAME, NULL, CTX_NONE);
 879
 880
 881         snprintf(dir, SIZ, "%s/webcit.css", static_local_dir);
 882         if (!access(dir, R_OK)) {
 883                 lprintf(9, "Using local Stylesheet [%s]\n", dir);
 884                 csslocal = NewStrBufPlain(HKEY("<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\" />"));
 885         }
 886         else
 887                 lprintf(9, "No Site-local Stylesheet [%s] installed. \n", dir);
 888
 889 }
 890
 891 void
 892 ServerStartModule_WEBCIT
 893 (void)
 894 {
 895         HandlerHash = NewHash(1, NULL);
 896 }
 897
 898
 899 void
 900 ServerShutdownModule_WEBCIT
 901 (void)
 902 {
 903         FreeStrBuf(&csslocal);
 904         DeleteHash(&HandlerHash);
 905 }
 906
 907
 908
 909 void
 910 SessionNewModule_WEBCIT
 911 (wcsession *sess)
 912 {
 913         sess->ImportantMsg = NewStrBuf();
 914         sess->WBuf = NewStrBufPlain(NULL, SIZ * 4);
 915         sess->HBuf = NewStrBufPlain(NULL, SIZ / 4);
 916 }
 917
 918 void
 919 SessionDetachModule_WEBCIT
 920 (wcsession *sess)
 921 {
 922         DeleteHash(&sess->Directory);
 923
 924         FreeStrBuf(&sess->upload);
 925         sess->upload_length = 0;
 926
 927         FreeStrBuf(&sess->trailing_javascript);
 928
 929         if (StrLength(sess->WBuf) > SIZ * 30) /* Bigger than 120K? release. */
 930         {
 931                 FreeStrBuf(&sess->WBuf);
 932                 sess->WBuf = NewStrBuf();
 933         }
 934         else
 935                 FlushStrBuf(sess->WBuf);
 936         FlushStrBuf(sess->HBuf);
 937 }
 938
 939 void
 940 SessionDestroyModule_WEBCIT
 941 (wcsession *sess)
 942 {
 943         FreeStrBuf(&sess->WBuf);
 944         FreeStrBuf(&sess->HBuf);
 945         FreeStrBuf(&sess->ImportantMsg);
 946 }
 947