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, int is_static)
 254 {
 255
 256         lprintf(9, "http_transmit_thing(%s)%s\n", content_type, ((is_static > 0) ? " (static)" : ""));
 257         output_headers(0, 0, 0, 0, 0, is_static);
 258
 259         hprintf("Content-type: %s\r\n"
 260                 "Server: %s\r\n"
 261                 "Connection: close\r\n",
 262                 content_type,
 263                 PACKAGE_STRING);
 264
 265         end_burst();
 266 }
 267
 268
 269 /*
 270  * Convenience functions to display a page containing only a string
 271  *
 272  * titlebarcolor        color of the titlebar of the frame
 273  * titlebarmsg          text to display in the title bar
 274  * messagetext          body of the box
 275  */
 276 void convenience_page(const char *titlebarcolor, const char *titlebarmsg, const char *messagetext)
 277 {
 278         hprintf("HTTP/1.1 200 OK\n");
 279         output_headers(1, 1, 2, 0, 0, 0);
 280         wc_printf("<div id=\"banner\">\n");
 281         wc_printf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 282         wc_printf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 283         wc_printf("</td></tr></table>\n");
 284         wc_printf("</div>\n<div id=\"content\">\n");
 285         escputs(messagetext);
 286
 287         wc_printf("<hr />\n");
 288         wDumpContent(1);
 289 }
 290
 291
 292 /*
 293  * Display a blank page.
 294  */
 295 void blank_page(void) {
 296         output_headers(1, 1, 0, 0, 0, 0);
 297         wDumpContent(2);
 298 }
 299
 300
 301 /*
 302  * A template has been requested
 303  */
 304 void url_do_template(void) {
 305         const StrBuf *MimeType;
 306         const StrBuf *Tmpl = sbstr("template");
 307         begin_burst();
 308         MimeType = DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 309         http_transmit_thing(ChrPtr(MimeType), 0);
 310 }
 311
 312
 313
 314 /*
 315  * convenience function to indicate success
 316  */
 317 void display_success(char *successmessage)
 318 {
 319         convenience_page("007700", "OK", successmessage);
 320 }
 321
 322
 323 /*
 324  * Authorization required page (sends a 401, causing the browser to request login credentials)
 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 int ReadPostData(void)
 477 {
 478         int rc;
 479         int urlencoded_post = 0;
 480         wcsession *WCC = WC;
 481         StrBuf *content = NULL;
 482
 483         urlencoded_post = (strncasecmp(ChrPtr(WCC->Hdr->HR.ContentType), "application/x-www-form-urlencoded", 33) == 0) ;
 484
 485         content = NewStrBufPlain(NULL, WCC->Hdr->HR.ContentLength + 256);
 486
 487         if (!urlencoded_post)
 488         {
 489                 StrBufPrintf(content,
 490                      "Content-type: %s\n"
 491                              "Content-length: %ld\n\n",
 492                              ChrPtr(WCC->Hdr->HR.ContentType),
 493                              WCC->Hdr->HR.ContentLength);
 494         }
 495
 496         /** Read the entire input data at once. */
 497         rc = client_read_to(WCC->Hdr, content,
 498                             WCC->Hdr->HR.ContentLength,
 499                             SLEEPING);
 500         if (rc < 0)
 501                 return rc;
 502
 503
 504         if (urlencoded_post) {
 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                         hprintf("HTTP/1.1 503 Service Unavailable\r\n");
 656                         hprintf("Content-Type: text/html\r\n");
 657                         begin_burst();
 658                         wc_printf("<html><head><title>503 Service Unavailable</title></head><body>\n");
 659                         wc_printf(_("This program was unable to connect or stay "
 660                                 "connected to the Citadel server.  Please report "
 661                                 "this problem to your system administrator.")
 662                         );
 663                         wc_printf("</body></html>\n");
 664                         end_burst();
 665                         goto SKIP_ALL_THIS_CRAP;
 666                 }
 667         }
 668
 669
 670         /*
 671          * If we're not logged in, but we have authentication data (either from
 672          * a cookie or from http-auth), try logging in to Citadel using that.
 673          */
 674         if ((!WCC->logged_in)
 675             && (StrLength(WCC->Hdr->c_username) > 0)
 676             && (StrLength(WCC->Hdr->c_password) > 0))
 677         {
 678                 long Status;
 679
 680                 FlushStrBuf(Buf);
 681                 serv_printf("USER %s", ChrPtr(WCC->Hdr->c_username));
 682                 StrBuf_ServGetln(Buf);
 683                 if (GetServerStatus(Buf, &Status) == 3) {
 684                         serv_printf("PASS %s", ChrPtr(WCC->Hdr->c_password));
 685                         StrBuf_ServGetln(Buf);
 686                         if (GetServerStatus(Buf, NULL) == 2) {
 687                                 become_logged_in(WCC->Hdr->c_username,
 688                                                  WCC->Hdr->c_password, Buf);
 689                         } else {
 690                                 /* Should only display when password is wrong */
 691                                 WCC->ImportantMsg = NewStrBufPlain(ChrPtr(Buf) + 4, StrLength(Buf) - 4);
 692                                 authorization_required();
 693                                 FreeStrBuf(&Buf);
 694                                 goto SKIP_ALL_THIS_CRAP;
 695                         }
 696                 }
 697                 else if (Status == 541) {
 698                         WCC->logged_in = 1;
 699                 }
 700         }
 701
 702         xhttp = (WCC->Hdr->HR.eReqType != eGET) &&
 703                 (WCC->Hdr->HR.eReqType != ePOST) &&
 704                 (WCC->Hdr->HR.eReqType != eHEAD);
 705
 706         /*
 707          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 708          * prior to doing anything else.
 709          */
 710         if (havebstr("gotofirst")) {
 711                 int ret;
 712                 ret = gotoroom(sbstr("gotofirst"));     /* do quietly to avoid session output! */
 713                 if ((ret/100) != 2) {
 714                         lprintf(1, "GOTOFIRST: Unable to change to [%s]; Reason: %d\n",
 715                                 bstr("gotofirst"), ret);
 716                 }
 717         }
 718
 719         /*
 720          * If we aren't in any room yet, but we have cookie data telling us where we're
 721          * supposed to be, and 'gotofirst' was not specified, then go there.
 722          */
 723         else if ( (StrLength(WCC->CurRoom.name) == 0) && ( (StrLength(WCC->Hdr->c_roomname) > 0) )) {
 724                 int ret;
 725
 726                 lprintf(9, "We are in '%s' but cookie indicates '%s', going there...\n",
 727                         ChrPtr(WCC->CurRoom.name),
 728                         ChrPtr(WCC->Hdr->c_roomname)
 729                 );
 730                 ret = gotoroom(WCC->Hdr->c_roomname);   /* do quietly to avoid session output! */
 731                 if ((ret/100) != 2) {
 732                         lprintf(1, "COOKIEGOTO: Unable to change to [%s]; Reason: %d\n",
 733                                 ChrPtr(WCC->Hdr->c_roomname), ret);
 734                 }
 735         }
 736
 737         if (WCC->Hdr->HR.Handler != NULL) {
 738                 if (    (!WCC->logged_in)
 739                         && ((WCC->Hdr->HR.Handler->Flags & ANONYMOUS) == 0)
 740                         && (WCC->serv_info->serv_supports_guest == 0)
 741                 ) {
 742                         display_login();
 743                 }
 744                 else {
 745 /*
 746                         if ((WCC->Hdr->HR.Handler->Flags & PARSE_REST_URL) != 0)
 747                                 ParseREST_URL();
 748 */
 749                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 750                                 begin_ajax_response();
 751                         WCC->Hdr->HR.Handler->F();
 752                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 753                                 end_ajax_response();
 754                 }
 755         }
 756         /* When all else fails, display the default landing page or a main menu. */
 757         else {
 758                 /*
 759                  * ordinary browser users get a nice login screen, DAV etc. requsets
 760                  * are given a 401 so they can handle it appropriate.
 761                  */
 762                 if (!WCC->logged_in)  {
 763                         if (xhttp) {
 764                                 authorization_required();
 765                         }
 766                         else {
 767                                 display_default_landing_page();
 768                         }
 769                 }
 770                 /*
 771                  * Toplevel dav requests? or just a flat browser request?
 772                  */
 773                 else {
 774                         if (xhttp)
 775                                 groupdav_main();
 776                         else
 777                                 display_main_menu();
 778                 }
 779         }
 780
 781 SKIP_ALL_THIS_CRAP:
 782         FreeStrBuf(&Buf);
 783         fflush(stdout);
 784 }
 785
 786
 787
 788 /*
 789  * Display the appropriate landing page for this site.
 790  */
 791 void display_default_landing_page(void) {
 792         if (WC->serv_info->serv_supports_guest) {
 793                 /* default action.  probably revisit this. */
 794                 StrBuf *teh_lobby = NewStrBufPlain(HKEY("_BASEROOM_"));
 795                 smart_goto(teh_lobby);
 796                 FreeStrBuf(&teh_lobby);
 797         }
 798         else {
 799                 display_login();
 800         }
 801 }
 802
 803
 804 /*
 805  * Replacement for sleep() that uses select() in order to avoid SIGALRM
 806  */
 807 void sleeeeeeeeeep(int seconds)
 808 {
 809         struct timeval tv;
 810
 811         tv.tv_sec = seconds;
 812         tv.tv_usec = 0;
 813         select(0, NULL, NULL, NULL, &tv);
 814 }
 815
 816 int Conditional_IS_HTTPS(StrBuf *Target, WCTemplputParams *TP)
 817 {
 818         return is_https != 0;
 819 }
 820
 821 void AppendImportantMessage(const char *pch, long len)
 822 {
 823         wcsession *WCC = WC;
 824
 825         if (StrLength(WCC->ImportantMsg) > 0) {
 826                 StrBufAppendBufPlain(WCC->ImportantMsg, HKEY("\n"), 0);
 827         }
 828
 829         StrBufAppendBufPlain(WCC->ImportantMsg, pch, len, 0);
 830 }
 831
 832 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
 833 {
 834         wcsession *WCC = WC;
 835         if (WCC != NULL)
 836                 return ((!IsEmptyStr(WCC->ImportantMessage)) ||
 837                         (StrLength(WCC->ImportantMsg) > 0));
 838         else
 839                 return 0;
 840 }
 841
 842 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
 843 {
 844         wcsession *WCC = WC;
 845
 846         if (WCC != NULL) {
 847                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 848                         StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
 849                         WCC->ImportantMessage[0] = '\0';
 850                 }
 851                 else if (StrLength(WCC->ImportantMsg) > 0) {
 852                         StrEscAppend(Target, WCC->ImportantMsg, NULL, 0, 0);
 853                         FlushStrBuf(WCC->ImportantMsg);
 854                 }
 855         }
 856 }
 857
 858 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
 859 {
 860         wcsession *WCC = WC;
 861
 862         if (WCC != NULL)
 863                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
 864 }
 865
 866 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
 867 {
 868         StrBufAppendBuf(Target,
 869                         csslocal, 0);
 870 }
 871
 872 extern char static_local_dir[PATH_MAX];
 873
 874
 875 void
 876 InitModule_WEBCIT
 877 (void)
 878 {
 879         char dir[SIZ];
 880         WebcitAddUrlHandler(HKEY("blank"), "", 0, blank_page, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 881         WebcitAddUrlHandler(HKEY("do_template"), "", 0, url_do_template, ANONYMOUS);
 882         WebcitAddUrlHandler(HKEY("sslg"), "", 0, seconds_since_last_gexp, AJAX|LOGCHATTY);
 883         WebcitAddUrlHandler(HKEY("ajax_servcmd"), "", 0, ajax_servcmd, 0);
 884         WebcitAddUrlHandler(HKEY("webcit"), "", 0, blank_page, URLNAMESPACE);
 885
 886         WebcitAddUrlHandler(HKEY("401"), "", 0, authorization_required, ANONYMOUS|COOKIEUNNEEDED);
 887         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
 888         RegisterConditional(HKEY("COND:REST:DEPTH"), 0, Conditional_REST_DEPTH, CTX_NONE);
 889         RegisterConditional(HKEY("COND:IS_HTTPS"), 0, Conditional_IS_HTTPS, CTX_NONE);
 890
 891         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, NULL, CTX_NONE);
 892         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, NULL, CTX_NONE);
 893         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, NULL, CTX_NONE);
 894         RegisterNamespace("URL:DISPLAYNAME", 0, 1, tmplput_HANDLER_DISPLAYNAME, NULL, CTX_NONE);
 895
 896
 897         snprintf(dir, SIZ, "%s/webcit.css", static_local_dir);
 898         if (!access(dir, R_OK)) {
 899                 lprintf(9, "Using local Stylesheet [%s]\n", dir);
 900                 csslocal = NewStrBufPlain(HKEY("<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\" />"));
 901         }
 902         else
 903                 lprintf(9, "No Site-local Stylesheet [%s] installed. \n", dir);
 904
 905 }
 906
 907 void
 908 ServerStartModule_WEBCIT
 909 (void)
 910 {
 911         HandlerHash = NewHash(1, NULL);
 912 }
 913
 914
 915 void
 916 ServerShutdownModule_WEBCIT
 917 (void)
 918 {
 919         FreeStrBuf(&csslocal);
 920         DeleteHash(&HandlerHash);
 921 }
 922
 923
 924
 925 void
 926 SessionNewModule_WEBCIT
 927 (wcsession *sess)
 928 {
 929         sess->ImportantMsg = NewStrBuf();
 930         sess->WBuf = NewStrBufPlain(NULL, SIZ * 4);
 931         sess->HBuf = NewStrBufPlain(NULL, SIZ / 4);
 932 }
 933
 934 void
 935 SessionDetachModule_WEBCIT
 936 (wcsession *sess)
 937 {
 938         DeleteHash(&sess->Directory);
 939
 940         FreeStrBuf(&sess->upload);
 941         sess->upload_length = 0;
 942
 943         FreeStrBuf(&sess->trailing_javascript);
 944
 945         if (StrLength(sess->WBuf) > SIZ * 30) /* Bigger than 120K? release. */
 946         {
 947                 FreeStrBuf(&sess->WBuf);
 948                 sess->WBuf = NewStrBuf();
 949         }
 950         else
 951                 FlushStrBuf(sess->WBuf);
 952         FlushStrBuf(sess->HBuf);
 953 }
 954
 955 void
 956 SessionDestroyModule_WEBCIT
 957 (wcsession *sess)
 958 {
 959         FreeStrBuf(&sess->WBuf);
 960         FreeStrBuf(&sess->HBuf);
 961         FreeStrBuf(&sess->ImportantMsg);
 962 }
 963