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