webcit/webcit.c

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