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