webcit/webcit.c

   1 /*
   2  * $Id$
   3  *
   4  * This is the main transaction loop of the web service.  It maintains a
   5  * persistent session to the Citadel server, handling HTTP WebCit requests as
   6  * they arrive and presenting a user interface.
   7  */
   8 #define SHOW_ME_VAPPEND_PRINTF
   9 #include <stdio.h>
  10 #include <stdarg.h>
  11 #include "webcit.h"
  12 #include "groupdav.h"
  13 #include "webserver.h"
  14
  15
  16 /*
  17  * String to unset the cookie.
  18  * Any date "in the past" will work, so I chose my birthday, right down to
  19  * the exact minute.  :)
  20  */
  21 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  22 StrBuf *csslocal = NULL;
  23 HashList *HandlerHash = NULL;
  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
  51 /*
  52  * web-printing funcion. uses our vsnprintf wrapper
  53  */
  54 void wc_printf(const char *format,...)
  55 {
  56         wcsession *WCC = WC;
  57         va_list arg_ptr;
  58
  59         if (WCC->WBuf == NULL)
  60                 WCC->WBuf = NewStrBuf();
  61
  62         va_start(arg_ptr, format);
  63         StrBufVAppendPrintf(WCC->WBuf, format, arg_ptr);
  64         va_end(arg_ptr);
  65 }
  66
  67 /*
  68  * http-header-printing funcion. uses our vsnprintf wrapper
  69  */
  70 void hprintf(const char *format,...)
  71 {
  72         wcsession *WCC = WC;
  73         va_list arg_ptr;
  74
  75         va_start(arg_ptr, format);
  76         StrBufVAppendPrintf(WCC->HBuf, format, arg_ptr);
  77         va_end(arg_ptr);
  78 }
  79
  80
  81
  82 /*
  83  * wrap up an HTTP session, closes tags, etc.
  84  *
  85  * print_standard_html_footer should be set to:
  86  * 0            - to transmit only,
  87  * nonzero      - to append the closing tags
  88  */
  89 void wDumpContent(int print_standard_html_footer)
  90 {
  91         if (print_standard_html_footer) {
  92                 wc_printf("</div> <!-- end of 'content' div -->\n");
  93                 do_template("trailing", NULL);
  94         }
  95
  96         /* If we've been saving it all up for one big output burst,
  97          * go ahead and do that now.
  98          */
  99         end_burst();
 100 }
 101
 102
 103
 104
 105 /*
 106  * Output HTTP headers and leading HTML for a page
 107  */
 108 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 109                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 110
 111                         int do_room_banner,     /* 0=no, 1=yes,
 112                                                  * 2 = I'm going to embed my own, so don't open the
 113                                                  *     <div id="content"> either.
 114                                                  */
 115
 116                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 117                         int suppress_check,     /* 1 = suppress check for instant messages          */
 118                         int cache               /* 1 = allow browser to cache this page             */
 119 ) {
 120         wcsession *WCC = WC;
 121         char cookie[1024];
 122         char httpnow[128];
 123
 124         hprintf("HTTP/1.1 200 OK\n");
 125         http_datestring(httpnow, sizeof httpnow, time(NULL));
 126
 127         if (do_httpheaders) {
 128                 if (WCC->serv_info != NULL)
 129                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 130                                 "Server: %s / %s\n"
 131                                 "Connection: close\r\n",
 132                                 PACKAGE_STRING,
 133                                 ChrPtr(WCC->serv_info->serv_software));
 134                 else
 135                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 136                                 "Server: %s / [n/a]\n"
 137                                 "Connection: close\r\n",
 138                                 PACKAGE_STRING);
 139         }
 140
 141         if (cache > 0) {
 142                 char httpTomorow[128];
 143
 144                 http_datestring(httpTomorow, sizeof httpTomorow,
 145                                 time(NULL) + 60 * 60 * 24 * 2);
 146
 147                 hprintf("Pragma: public\r\n"
 148                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 149                         "Last-modified: %s\r\n"
 150                         "Expires: %s\r\n",
 151                         httpnow,
 152                         httpTomorow
 153                 );
 154         }
 155         else {
 156                 hprintf("Pragma: no-cache\r\n"
 157                         "Cache-Control: no-store\r\n"
 158                         "Expires: -1\r\n"
 159                 );
 160         }
 161
 162         if (cache < 2) {
 163
 164                 stuff_to_cookie(cookie, 1024,
 165                                 WCC->wc_session,
 166                                 WCC->wc_username,
 167                                 WCC->wc_password,
 168                                 WCC->wc_roomname,
 169                                 get_selected_language()
 170                         );
 171
 172                 if (unset_cookies) {
 173                         hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 174                 } else {
 175                         if (server_cookie != NULL) {
 176                                 hprintf("Set-cookie: webcit=%s; path=/ %s\r\n",
 177                                         cookie, server_cookie);
 178                         }
 179                         else {
 180                                 hprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 181                         }
 182                 }
 183         }
 184
 185         if (do_htmlhead) {
 186                 begin_burst();
 187                 do_template("head", NULL);
 188
 189                 /* check for ImportantMessages (these display in a div overlaying the main screen) */
 190                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 191                         wc_printf("<div id=\"important_message\">\n"
 192                                 "<span class=\"imsg\">");
 193                         StrEscAppend(WCC->WBuf, NULL, WCC->ImportantMessage, 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                         WCC->ImportantMessage[0] = 0;
 202                 }
 203                 else if (StrLength(WCC->ImportantMsg) > 0) {
 204                         wc_printf("<div id=\"important_message\">\n"
 205                                 "<span class=\"imsg\">");
 206                         StrEscAppend(WCC->WBuf, WCC->ImportantMsg, NULL, 0, 0);
 207                         wc_printf("</span><br />\n"
 208                                 "</div>\n"
 209                         );
 210                         StrBufAppendBufPlain(WCC->trailing_javascript,
 211                                              HKEY("setTimeout('hide_imsg_popup()', 5000);       \n"),
 212                                              0
 213                         );
 214                         FlushStrBuf(WCC->ImportantMsg);
 215                 }
 216                 if ( (WCC->logged_in) && (!unset_cookies) ) {
 217                         DoTemplate(HKEY("paging"), NULL, &NoCtx);
 218                 }
 219
 220                 if (do_room_banner == 1) {
 221                         wc_printf("<div id=\"banner\">\n");
 222                         embed_room_banner(NULL, navbar_default);
 223                         wc_printf("</div>\n");
 224                 }
 225         }
 226
 227         if (do_room_banner == 1) {
 228                 wc_printf("<div id=\"content\">\n");
 229         }
 230 }
 231
 232 void output_custom_content_header(const char *ctype) {
 233   hprintf("HTTP/1.1 200 OK\r\n");
 234   hprintf("Content-type: %s; charset=utf-8\r\n",ctype);
 235   hprintf("Server: %s / %s\r\n", PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software));
 236   hprintf("Connection: close\r\n");
 237 }
 238
 239
 240 /*
 241  * Generic function to do an HTTP redirect.  Easy and fun.
 242  */
 243 void http_redirect(const char *whichpage) {
 244         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 245         hprintf("Location: %s\r\n", whichpage);
 246         hprintf("URI: %s\r\n", whichpage);
 247         hprintf("Content-type: text/html; charset=utf-8\r\n");
 248         begin_burst();
 249         wc_printf("<html><body>");
 250         wc_printf("Go <a href=\"%s\">here</A>.", whichpage);
 251         wc_printf("</body></html>\n");
 252         end_burst();
 253 }
 254
 255
 256
 257 /*
 258  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 259  */
 260 void http_transmit_thing(const char *content_type,
 261                          int is_static) {
 262
 263 #ifndef TECH_PREVIEW
 264         lprintf(9, "http_transmit_thing(%s)%s\n",
 265                 content_type,
 266                 ((is_static > 0) ? " (static)" : "")
 267         );
 268 #endif
 269         output_headers(0, 0, 0, 0, 0, is_static);
 270
 271         hprintf("Content-type: %s\r\n"
 272                 "Server: %s\r\n"
 273                 "Connection: close\r\n",
 274                 content_type,
 275                 PACKAGE_STRING);
 276
 277         end_burst();
 278 }
 279
 280
 281 /*
 282  * Convenience functions to display a page containing only a string
 283  *
 284  * titlebarcolor        color of the titlebar of the frame
 285  * titlebarmsg          text to display in the title bar
 286  * messagetext          body of the box
 287  */
 288 void convenience_page(const char *titlebarcolor, const char *titlebarmsg, const char *messagetext)
 289 {
 290         hprintf("HTTP/1.1 200 OK\n");
 291         output_headers(1, 1, 2, 0, 0, 0);
 292         wc_printf("<div id=\"banner\">\n");
 293         wc_printf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 294         wc_printf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 295         wc_printf("</td></tr></table>\n");
 296         wc_printf("</div>\n<div id=\"content\">\n");
 297         escputs(messagetext);
 298
 299         wc_printf("<hr />\n");
 300         wDumpContent(1);
 301 }
 302
 303
 304 /*
 305  * Display a blank page.
 306  */
 307 void blank_page(void) {
 308         output_headers(1, 1, 0, 0, 0, 0);
 309         wDumpContent(2);
 310 }
 311
 312
 313 /*
 314  * A template has been requested
 315  */
 316 void url_do_template(void) {
 317         const StrBuf *MimeType;
 318         const StrBuf *Tmpl = sbstr("template");
 319         begin_burst();
 320         MimeType = DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 321         http_transmit_thing(ChrPtr(MimeType), 0);
 322 }
 323
 324
 325
 326 /*
 327  * convenience function to indicate success
 328  */
 329 void display_success(char *successmessage)
 330 {
 331         convenience_page("007700", "OK", successmessage);
 332 }
 333
 334
 335 /*
 336  * Authorization required page
 337  * This is probably temporary and should be revisited
 338  */
 339 void authorization_required(void)
 340 {
 341         wcsession *WCC = WC;
 342         const char *message = "";
 343
 344         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 345         hprintf(
 346                 "Server: %s / %s\r\n"
 347                 "Connection: close\r\n",
 348                 PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software)
 349         );
 350         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(WC->serv_info->serv_humannode));
 351         hprintf("Content-Type: text/html\r\n");
 352         begin_burst();
 353         wc_printf("<h1>");
 354         wc_printf(_("Authorization Required"));
 355         wc_printf("</h1>\r\n");
 356
 357
 358         if (WCC->ImportantMsg != NULL)
 359                 message = ChrPtr(WCC->ImportantMsg);
 360         else if (WCC->ImportantMessage != NULL)
 361                 message = WCC->ImportantMessage;
 362
 363         wc_printf(_("The resource you requested requires a valid username and password. "
 364                 "You could not be logged in: %s\n"), message);
 365         wDumpContent(0);
 366         end_webcit_session();
 367 }
 368
 369 /*
 370  * Convenience functions to wrap around asynchronous ajax responses
 371  */
 372 void begin_ajax_response(void) {
 373         wcsession *WCC = WC;
 374
 375         FlushStrBuf(WCC->HBuf);
 376         output_headers(0, 0, 0, 0, 0, 0);
 377
 378         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 379                 "Server: %s\r\n"
 380                 "Connection: close\r\n"
 381                 ,
 382                 PACKAGE_STRING);
 383         begin_burst();
 384 }
 385
 386 /*
 387  * print ajax response footer
 388  */
 389 void end_ajax_response(void) {
 390         wDumpContent(0);
 391 }
 392
 393
 394
 395 /*
 396  * Wraps a Citadel server command in an AJAX transaction.
 397  */
 398 void ajax_servcmd(void)
 399 {
 400         wcsession *WCC = WC;
 401         int Done = 0;
 402         StrBuf *Buf;
 403         char *junk;
 404         size_t len;
 405
 406         begin_ajax_response();
 407         Buf = NewStrBuf();
 408         serv_puts(bstr("g_cmd"));
 409         StrBuf_ServGetln(Buf);
 410         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 411         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 412
 413         switch (GetServerStatus(Buf, NULL)) {
 414         case 8:
 415                 serv_puts("\n\n000");
 416                 if ( (StrLength(Buf)==3) &&
 417                      !strcmp(ChrPtr(Buf), "000")) {
 418                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\000"), 0);
 419                         break;
 420                 }
 421         case 1:
 422                 while (!Done) {
 423                         StrBuf_ServGetln(Buf);
 424                         if ( (StrLength(Buf)==3) &&
 425                              !strcmp(ChrPtr(Buf), "000")) {
 426                                 Done = 1;
 427                         }
 428                         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 429                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 430                 }
 431                 break;
 432         case 4:
 433                 text_to_server(bstr("g_input"));
 434                 serv_puts("000");
 435                 break;
 436         case 6:
 437                 len = atol(&ChrPtr(Buf)[4]);
 438                 StrBuf_ServGetBLOBBuffered(Buf, len);
 439                 break;
 440         case 7:
 441                 len = atol(&ChrPtr(Buf)[4]);
 442                 junk = malloc(len);
 443                 memset(junk, 0, len);
 444                 serv_write(junk, len);
 445                 free(junk);
 446         }
 447
 448         end_ajax_response();
 449
 450         /*
 451          * This is kind of an ugly hack, but this is the only place it can go.
 452          * If the command was GEXP, then the instant messenger window must be
 453          * running, so reset the "last_pager_check" watchdog timer so
 454          * that page_popup() doesn't try to open it a second time.
 455          */
 456         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 457                 WCC->last_pager_check = time(NULL);
 458         }
 459         FreeStrBuf(&Buf);
 460 }
 461
 462
 463 /*
 464  * Helper function for the asynchronous check to see if we need
 465  * to open the instant messenger window.
 466  */
 467 void seconds_since_last_gexp(void)
 468 {
 469         char buf[256];
 470
 471         if ( (time(NULL) - WC->last_pager_check) < 30) {
 472                 wc_printf("NO\n");
 473         }
 474         else {
 475                 memset(buf, 0, 5);
 476                 serv_puts("NOOP");
 477                 serv_getln(buf, sizeof buf);
 478                 if (buf[3] == '*') {
 479                         wc_printf("YES");
 480                 }
 481                 else {
 482                         wc_printf("NO");
 483                 }
 484         }
 485 }
 486
 487
 488
 489 void ReadPostData(void)
 490 {
 491         int body_start = 0;
 492         wcsession *WCC = WC;
 493         StrBuf *content = NULL;
 494
 495         content = NewStrBufPlain(NULL, WCC->Hdr->HR.ContentLength + 256);
 496
 497         StrBufPrintf(content,
 498                      "Content-type: %s\n"
 499                      "Content-length: %ld\n\n",
 500                      ChrPtr(WCC->Hdr->HR.ContentType),
 501                              WCC->Hdr->HR.ContentLength);
 502 /*
 503   hprintf("Content-type: %s\n"
 504   "Content-length: %d\n\n",
 505   ContentType, ContentLength);
 506 */
 507         body_start = StrLength(content);
 508
 509         /** Read the entire input data at once. */
 510         client_read_to(WCC->Hdr, content,
 511                        WCC->Hdr->HR.ContentLength,
 512                        SLEEPING);
 513
 514         if (!strncasecmp(ChrPtr(WCC->Hdr->HR.ContentType), "application/x-www-form-urlencoded", 33)) {
 515                 StrBufCutLeft(content, body_start);
 516                 ParseURLParams(content);
 517         } else if (!strncasecmp(ChrPtr(WCC->Hdr->HR.ContentType), "multipart", 9)) {
 518                 char *Buf;
 519                 char *BufEnd;
 520                 long len;
 521
 522                 len = StrLength(content);
 523                 Buf = SmashStrBuf(&content);
 524                 BufEnd = Buf + len;
 525                 mime_parser(Buf, BufEnd, *upload_handler, NULL, NULL, NULL, 0);
 526                 free(Buf);
 527         } else if (WCC->Hdr->HR.ContentLength > 0) {
 528                 WCC->upload = content;
 529                 WCC->upload_length = StrLength(WCC->upload);
 530                 content = NULL;
 531         }
 532         FreeStrBuf(&content);
 533 }
 534
 535
 536 void ParseREST_URL(void)
 537 {
 538         StrBuf *Buf;
 539         StrBuf *pFloor = NULL;
 540         wcsession *WCC = WC;
 541         long i = 0;
 542         const char *pCh = NULL;
 543         HashList *Floors;
 544         void *vFloor;
 545
 546         WCC->Directory = NewHash(1, Flathash);
 547
 548         Buf = NewStrBuf();
 549         while (StrBufExtract_NextToken(WCC->Hdr->HR.ReqLine,
 550                                        Buf, &pCh,  '/') >= 0)
 551         {
 552                 Put(WCC->Directory, IKEY(i), Buf, HFreeStrBuf);
 553                 if (i==0)
 554                         pFloor = Buf;
 555                 i++;
 556                 Buf = NewStrBuf();
 557         }
 558         if (i == 0)
 559                 FreeStrBuf(&Buf);
 560         else if (pFloor != NULL)
 561         {
 562                 Floors = GetFloorListHash(NULL, NULL);
 563
 564                 if (Floors != NULL)
 565                 {
 566                         if (GetHash(Floors, SKEY(pFloor), &vFloor))
 567                                 WCC->CurrentFloor = (floor*) vFloor;
 568                 }
 569         }
 570 }
 571
 572
 573
 574
 575 /*
 576  * Entry point for WebCit transaction
 577  */
 578 void session_loop(void)
 579 {
 580         int Flags = 0;
 581         int xhttp;
 582         StrBuf *Buf;
 583
 584         /*
 585          * We stuff these with the values coming from the client cookies,
 586          * so we can use them to reconnect a timed out session if we have to.
 587          */
 588         wcsession *WCC;
 589
 590
 591         Buf = NewStrBuf();
 592
 593         WCC= WC;
 594
 595         WCC->upload_length = 0;
 596         WCC->upload = NULL;
 597         WCC->is_mobile = 0;
 598         WCC->trailing_javascript = NewStrBuf();
 599         WCC->Hdr->nWildfireHeaders = 0;
 600         if (WCC->Hdr->HR.Handler != NULL)
 601                 Flags = WCC->Hdr->HR.Handler->Flags; /* so we can temporarily add our own... */
 602
 603         if (WCC->Hdr->HR.ContentLength > 0) {
 604                 ReadPostData();
 605         }
 606
 607         /* If there are variables in the URL, we must grab them now */
 608         if (WCC->Hdr->PlainArgs != NULL)
 609                 ParseURLParams(WCC->Hdr->PlainArgs);
 610
 611         /* If the client sent a nonce that is incorrect, kill the request. */
 612         if (havebstr("nonce")) {
 613                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 614                         bstr("nonce"), WCC->nonce);
 615                 if (ibstr("nonce") != WCC->nonce) {
 616                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 617                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 618                         hprintf("Content-Type: text/plain\r\n");
 619                         begin_burst();
 620                         wc_printf("Security check failed.\r\n");
 621                         end_burst();
 622                         goto SKIP_ALL_THIS_CRAP;
 623                 }
 624         }
 625
 626         /*
 627          * If we're not connected to a Citadel server, try to hook up the
 628          * connection now.
 629          */
 630         if (!WCC->connected) {
 631                 if (GetConnected ())
 632                         goto SKIP_ALL_THIS_CRAP;
 633         }
 634
 635
 636         /*
 637          * If we're not logged in, but we have authentication data (either from
 638          * a cookie or from http-auth), try logging in to Citadel using that.
 639          */
 640         if ((!WCC->logged_in)
 641             && (StrLength(WCC->Hdr->c_username) > 0)
 642             && (StrLength(WCC->Hdr->c_password) > 0))
 643         {
 644                 FlushStrBuf(Buf);
 645                 serv_printf("USER %s", ChrPtr(WCC->Hdr->c_username));
 646                 StrBuf_ServGetln(Buf);
 647                 if (GetServerStatus(Buf, NULL) == 3) {
 648                         serv_printf("PASS %s", ChrPtr(WCC->Hdr->c_password));
 649                         StrBuf_ServGetln(Buf);
 650                         if (GetServerStatus(Buf, NULL) == 2) {
 651                                 become_logged_in(WCC->Hdr->c_username,
 652                                                  WCC->Hdr->c_password, Buf);
 653                         } else {
 654                                 /* Should only display when password is wrong */
 655                                 WCC->ImportantMsg = NewStrBufPlain(ChrPtr(Buf) + 4, StrLength(Buf) - 4);
 656                                 authorization_required();
 657                                 FreeStrBuf(&Buf);
 658                                 goto SKIP_ALL_THIS_CRAP;
 659                         }
 660                 }
 661         }
 662
 663         xhttp = (WCC->Hdr->HR.eReqType != eGET) &&
 664                 (WCC->Hdr->HR.eReqType != ePOST) &&
 665                 (WCC->Hdr->HR.eReqType != eHEAD);
 666
 667         /*
 668          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 669          * prior to doing anything else.
 670          */
 671         if (havebstr("gotofirst")) {
 672                 int ret;
 673                 ret = gotoroom(sbstr("gotofirst"));     /* do quietly to avoid session output! */
 674                 if ((ret/100) != 2) {
 675                         lprintf(1, "GOTOFIRST: Unable to change to [%s]; Reason: %d\n",
 676                                 bstr("gotofirst"), ret);
 677                 }
 678         }
 679
 680         /*
 681          * If we aren't in any room yet, but we have cookie data telling us where we're
 682          * supposed to be, and 'gotofirst' was not specified, then go there.
 683          */
 684         else if ( (StrLength(WCC->wc_roomname) == 0) && ( (StrLength(WCC->Hdr->c_roomname) > 0) )) {
 685                 int ret;
 686
 687                 lprintf(9, "We are in '%s' but cookie indicates '%s', going there...\n",
 688                         ChrPtr(WCC->wc_roomname),
 689                         ChrPtr(WCC->Hdr->c_roomname)
 690                 );
 691                 ret = gotoroom(WCC->Hdr->c_roomname);   /* do quietly to avoid session output! */
 692                 if ((ret/100) != 2) {
 693                         lprintf(1, "COOKIEGOTO: Unable to change to [%s]; Reason: %d\n",
 694                                 ChrPtr(WCC->Hdr->c_roomname), ret);
 695                 }
 696         }
 697
 698         if (WCC->Hdr->HR.Handler != NULL) {
 699                 if (!WCC->logged_in && ((WCC->Hdr->HR.Handler->Flags & ANONYMOUS) == 0)) {
 700                         display_login(NULL);
 701                 }
 702                 else {
 703 /*
 704                         if ((WCC->Hdr->HR.Handler->Flags & PARSE_REST_URL) != 0)
 705                                 ParseREST_URL();
 706 */
 707                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 708                                 begin_ajax_response();
 709                         WCC->Hdr->HR.Handler->F();
 710                         if ((WCC->Hdr->HR.Handler->Flags & AJAX) != 0)
 711                                 end_ajax_response();
 712                 }
 713         }
 714         /* When all else fais, display the main menu. */
 715         else {
 716                 /*
 717                  * ordinary browser users get a nice login screen, DAV etc. requsets
 718                  * are given a 401 so they can handle it appropriate.
 719                  */
 720                 if (!WCC->logged_in)  {
 721                         if (xhttp)
 722                                 authorization_required();
 723                         else
 724                                 display_login(NULL);
 725                 }
 726                 /*
 727                  * Toplevel dav requests? or just a flat browser request?
 728                  */
 729                 else {
 730                         if (xhttp)
 731                                 groupdav_main();
 732                         else
 733                                 display_main_menu();
 734                 }
 735         }
 736
 737 SKIP_ALL_THIS_CRAP:
 738         FreeStrBuf(&Buf);
 739         fflush(stdout);
 740 }
 741
 742
 743 /*
 744  * Replacement for sleep() that uses select() in order to avoid SIGALRM
 745  */
 746 void sleeeeeeeeeep(int seconds)
 747 {
 748         struct timeval tv;
 749
 750         tv.tv_sec = seconds;
 751         tv.tv_usec = 0;
 752         select(0, NULL, NULL, NULL, &tv);
 753 }
 754
 755
 756 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
 757 {
 758         wcsession *WCC = WC;
 759         if (WCC != NULL)
 760                 return ((!IsEmptyStr(WCC->ImportantMessage)) ||
 761                         (StrLength(WCC->ImportantMsg) > 0));
 762         else
 763                 return 0;
 764 }
 765
 766 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
 767 {
 768         wcsession *WCC = WC;
 769
 770         if (WCC != NULL) {
 771                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 772                         StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
 773                         WCC->ImportantMessage[0] = '\0';
 774                 }
 775                 else if (StrLength(WCC->ImportantMsg) > 0) {
 776                         StrEscAppend(Target, WCC->ImportantMsg, NULL, 0, 0);
 777                         FlushStrBuf(WCC->ImportantMsg);
 778                 }
 779         }
 780 }
 781
 782 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
 783 {
 784         wcsession *WCC = WC;
 785
 786         if (WCC != NULL)
 787                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
 788 }
 789
 790 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
 791 {
 792         StrBufAppendBuf(Target,
 793                         csslocal, 0);
 794 }
 795
 796 extern char static_local_dir[PATH_MAX];
 797
 798
 799 void
 800 InitModule_WEBCIT
 801 (void)
 802 {
 803         char dir[SIZ];
 804         WebcitAddUrlHandler(HKEY("blank"), "", 0, blank_page, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 805         WebcitAddUrlHandler(HKEY("do_template"), "", 0, url_do_template, ANONYMOUS);
 806         WebcitAddUrlHandler(HKEY("sslg"), "", 0, seconds_since_last_gexp, AJAX|LOGCHATTY);
 807         WebcitAddUrlHandler(HKEY("ajax_servcmd"), "", 0, ajax_servcmd, 0);
 808         WebcitAddUrlHandler(HKEY("webcit"), "", 0, blank_page, URLNAMESPACE);
 809
 810         WebcitAddUrlHandler(HKEY("401"), "", 0, authorization_required, ANONYMOUS|COOKIEUNNEEDED);
 811         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
 812         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, NULL, CTX_NONE);
 813         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, NULL, CTX_NONE);
 814         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, NULL, CTX_NONE);
 815
 816         snprintf(dir, SIZ, "%s/webcit.css", static_local_dir);
 817         if (!access(dir, R_OK)) {
 818                 lprintf(9, "Using local Stylesheet [%s]\n", dir);
 819                 csslocal = NewStrBufPlain(HKEY("<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\" />"));
 820         }
 821         else
 822                 lprintf(9, "No Site-local Stylesheet [%s] installed. \n", dir);
 823
 824 }
 825
 826 void
 827 ServerStartModule_WEBCIT
 828 (void)
 829 {
 830         HandlerHash = NewHash(1, NULL);
 831 }
 832
 833
 834 void
 835 ServerShutdownModule_WEBCIT
 836 (void)
 837 {
 838         FreeStrBuf(&csslocal);
 839         DeleteHash(&HandlerHash);
 840 }
 841
 842
 843
 844 void
 845 SessionNewModule_WEBCIT
 846 (wcsession *sess)
 847 {
 848         sess->ImportantMsg = NewStrBuf();
 849         sess->WBuf = NewStrBufPlain(NULL, SIZ * 4);
 850         sess->HBuf = NewStrBufPlain(NULL, SIZ / 4);
 851 }
 852
 853 void
 854 SessionDetachModule_WEBCIT
 855 (wcsession *sess)
 856 {
 857         DeleteHash(&sess->Directory);
 858
 859         FreeStrBuf(&sess->upload);
 860         sess->upload_length = 0;
 861
 862         FreeStrBuf(&sess->trailing_javascript);
 863
 864         if (StrLength(sess->WBuf) > SIZ * 30) /* Bigger than 120K? release. */
 865         {
 866                 FreeStrBuf(&sess->WBuf);
 867                 sess->WBuf = NewStrBuf();
 868         }
 869         else
 870                 FlushStrBuf(sess->WBuf);
 871         FlushStrBuf(sess->HBuf);
 872 }
 873
 874 void
 875 SessionDestroyModule_WEBCIT
 876 (wcsession *sess)
 877 {
 878         FreeStrBuf(&sess->WBuf);
 879         FreeStrBuf(&sess->HBuf);
 880         FreeStrBuf(&sess->ImportantMsg);
 881 }
 882