webcit/webcit.c

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