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 void WebcitAddUrlHandler(const char * UrlString,
  26                          long UrlSLen,
  27                          WebcitHandlerFunc F,
  28                          long Flags)
  29 {
  30         WebcitHandler *NewHandler;
  31         NewHandler = (WebcitHandler*) malloc(sizeof(WebcitHandler));
  32         NewHandler->F = F;
  33         NewHandler->Flags = Flags;
  34         Put(HandlerHash, UrlString, UrlSLen, NewHandler, NULL);
  35 }
  36
  37
  38 /*
  39  * web-printing funcion. uses our vsnprintf wrapper
  40  */
  41 void wprintf(const char *format,...)
  42 {
  43         wcsession *WCC = WC;
  44         va_list arg_ptr;
  45
  46         if (WCC->WBuf == NULL)
  47                 WCC->WBuf = NewStrBuf();
  48
  49         va_start(arg_ptr, format);
  50         StrBufVAppendPrintf(WCC->WBuf, format, arg_ptr);
  51         va_end(arg_ptr);
  52 }
  53
  54 /*
  55  * http-header-printing funcion. uses our vsnprintf wrapper
  56  */
  57 void hprintf(const char *format,...)
  58 {
  59         wcsession *WCC = WC;
  60         va_list arg_ptr;
  61
  62         va_start(arg_ptr, format);
  63         StrBufVAppendPrintf(WCC->HBuf, format, arg_ptr);
  64         va_end(arg_ptr);
  65 }
  66
  67
  68
  69 /*
  70  * wrap up an HTTP session, closes tags, etc.
  71  *
  72  * print_standard_html_footer should be set to:
  73  * 0            - to transmit only,
  74  * nonzero      - to append the closing tags
  75  */
  76 void wDumpContent(int print_standard_html_footer)
  77 {
  78         if (print_standard_html_footer) {
  79                 wprintf("</div> <!-- end of 'content' div -->\n");
  80                 do_template("trailing", NULL);
  81         }
  82
  83         /* If we've been saving it all up for one big output burst,
  84          * go ahead and do that now.
  85          */
  86         end_burst();
  87 }
  88
  89
  90
  91
  92 /*
  93  * Output HTTP headers and leading HTML for a page
  94  */
  95 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
  96                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
  97
  98                         int do_room_banner,     /* 0=no, 1=yes,
  99                                                  * 2 = I'm going to embed my own, so don't open the
 100                                                  *     <div id="content"> either.
 101                                                  */
 102
 103                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 104                         int suppress_check,     /* 1 = suppress check for instant messages          */
 105                         int cache               /* 1 = allow browser to cache this page             */
 106 ) {
 107         wcsession *WCC = WC;
 108         char cookie[1024];
 109         char httpnow[128];
 110
 111         hprintf("HTTP/1.1 200 OK\n");
 112         http_datestring(httpnow, sizeof httpnow, time(NULL));
 113
 114         if (do_httpheaders) {
 115                 if (WCC->serv_info != NULL)
 116                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 117                                 "Server: %s / %s\n"
 118                                 "Connection: close\r\n",
 119                                 PACKAGE_STRING,
 120                                 ChrPtr(WCC->serv_info->serv_software));
 121                 else
 122                         hprintf("Content-type: text/html; charset=utf-8\r\n"
 123                                 "Server: %s / [n/a]\n"
 124                                 "Connection: close\r\n",
 125                                 PACKAGE_STRING);
 126         }
 127
 128         if (cache) {
 129                 char httpTomorow[128];
 130
 131                 http_datestring(httpTomorow, sizeof httpTomorow,
 132                                 time(NULL) + 60 * 60 * 24 * 2);
 133
 134                 hprintf("Pragma: public\r\n"
 135                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 136                         "Last-modified: %s\r\n"
 137                         "Expires: %s\r\n",
 138                         httpnow,
 139                         httpTomorow
 140                 );
 141         }
 142         else {
 143                 hprintf("Pragma: no-cache\r\n"
 144                         "Cache-Control: no-store\r\n"
 145                         "Expires: -1\r\n"
 146                 );
 147         }
 148
 149         stuff_to_cookie(cookie, 1024,
 150                         WCC->wc_session, WCC->wc_username,
 151                         WCC->wc_password, WCC->wc_roomname);
 152
 153         if (unset_cookies) {
 154                 hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 155         } else {
 156                 hprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 157                 if (server_cookie != NULL) {
 158                         hprintf("%s\n", server_cookie);
 159                 }
 160         }
 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                         wprintf("<div id=\"important_message\">\n"
 169                                 "<span class=\"imsg\">");
 170                         StrEscAppend(WCC->WBuf, NULL, WCC->ImportantMessage, 0, 0);
 171                         wprintf("</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                         wprintf("<div id=\"important_message\">\n"
 182                                 "<span class=\"imsg\">");
 183                         StrEscAppend(WCC->WBuf, WCC->ImportantMsg, NULL, 0, 0);
 184                         wprintf("</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("iconbar"), NULL, &NoCtx);*/
 195                         page_popup();
 196                 }
 197
 198                 if (do_room_banner == 1) {
 199                         wprintf("<div id=\"banner\">\n");
 200                         embed_room_banner(NULL, navbar_default);
 201                         wprintf("</div>\n");
 202                 }
 203         }
 204
 205         if (do_room_banner == 1) {
 206                 wprintf("<div id=\"content\">\n");
 207         }
 208 }
 209
 210 void output_custom_content_header(const char *ctype) {
 211   hprintf("HTTP/1.1 200 OK\r\n");
 212   hprintf("Content-type: %s; charset=utf-8\r\n",ctype);
 213   hprintf("Server: %s / %s\r\n", PACKAGE_STRING, ChrPtr(WC->serv_info->serv_software));
 214   hprintf("Connection: close\r\n");
 215 }
 216
 217
 218 /*
 219  * Generic function to do an HTTP redirect.  Easy and fun.
 220  */
 221 void http_redirect(const char *whichpage) {
 222         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 223         hprintf("Location: %s\r\n", whichpage);
 224         hprintf("URI: %s\r\n", whichpage);
 225         hprintf("Content-type: text/html; charset=utf-8\r\n");
 226         wprintf("<html><body>");
 227         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 228         wprintf("</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 ? " (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  * print menu box like used in the floor view or admin interface.
 259  * This function takes pair of strings as va_args,
 260  * Title        Title string of the box
 261  * Class        CSS Class for the box
 262  * nLines       How many string pairs should we print? (URL, UrlText)
 263  * ...          Pairs of URL Strings and their Names
 264  */
 265 void print_menu_box(char* Title, char *Class, int nLines, ...)
 266 {
 267         va_list arg_list;
 268         long i;
 269
 270         svput("BOXTITLE", WCS_STRING, Title);
 271         do_template("beginboxx", NULL);
 272
 273         wprintf("<ul class=\"%s\">", Class);
 274
 275         va_start(arg_list, nLines);
 276         for (i = 0; i < nLines; ++i)
 277         {
 278                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 279                 wprintf((char *) va_arg(arg_list, char *));
 280                 wprintf("</a></li>\n");
 281         }
 282         va_end (arg_list);
 283
 284         wprintf("</a></li>\n");
 285
 286         wprintf("</ul>");
 287
 288         do_template("endbox", NULL);
 289 }
 290
 291
 292 /*
 293  * dump out static pages from disk
 294  */
 295 void output_static(void)
 296 {
 297         int fd;
 298         struct stat statbuf;
 299         off_t bytes;
 300         off_t count = 0;
 301         const char *content_type;
 302         int len;
 303         const char *Err;
 304         char what[] = "TODO";
 305         fd = open(what, O_RDONLY);
 306         if (fd <= 0) {
 307                 lprintf(9, "output_static('%s')  -- NOT FOUND --\n", what);
 308                 hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 309                 hprintf("Content-Type: text/plain\r\n");
 310                 wprintf("Cannot open %s: %s\r\n", what, strerror(errno));
 311                 end_burst();
 312         } else {
 313                 len = strlen (what);
 314                 content_type = GuessMimeByFilename(what, len);
 315
 316                 if (fstat(fd, &statbuf) == -1) {
 317                         lprintf(9, "output_static('%s')  -- FSTAT FAILED --\n", what);
 318                         hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 319                         hprintf("Content-Type: text/plain\r\n");
 320                         wprintf("Cannot fstat %s: %s\n", what, strerror(errno));
 321                         end_burst();
 322                         return;
 323                 }
 324
 325                 count = 0;
 326                 bytes = statbuf.st_size;
 327
 328                 if (StrBufReadBLOB(WC->WBuf, &fd, 1, bytes, &Err) < 0)
 329                 {
 330                         if (fd > 0) close(fd);
 331                         lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) --\n", what, strerror(errno));
 332                                 hprintf("HTTP/1.1 500 internal server error \r\n");
 333                                 hprintf("Content-Type: text/plain\r\n");
 334                                 end_burst();
 335                                 return;
 336                 }
 337
 338
 339                 close(fd);
 340 #ifndef TECH_PREVIEW
 341                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
 342 #endif
 343                 http_transmit_thing(content_type, 1);
 344         }
 345         if (yesbstr("force_close_session")) {
 346                 end_webcit_session();
 347         }
 348 }
 349
 350
 351 /*
 352  * Convenience functions to display a page containing only a string
 353  *
 354  * titlebarcolor        color of the titlebar of the frame
 355  * titlebarmsg          text to display in the title bar
 356  * messagetext          body of the box
 357  */
 358 void convenience_page(const char *titlebarcolor, const char *titlebarmsg, const char *messagetext)
 359 {
 360         hprintf("HTTP/1.1 200 OK\n");
 361         output_headers(1, 1, 2, 0, 0, 0);
 362         wprintf("<div id=\"banner\">\n");
 363         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 364         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 365         wprintf("</td></tr></table>\n");
 366         wprintf("</div>\n<div id=\"content\">\n");
 367         escputs(messagetext);
 368
 369         wprintf("<hr />\n");
 370         wDumpContent(1);
 371 }
 372
 373
 374 /*
 375  * Display a blank page.
 376  */
 377 void blank_page(void) {
 378         output_headers(1, 1, 0, 0, 0, 0);
 379         wDumpContent(2);
 380 }
 381
 382
 383 /*
 384  * A template has been requested
 385  */
 386 void url_do_template(void) {
 387         const StrBuf *MimeType;
 388         const StrBuf *Tmpl = sbstr("template");
 389         begin_burst();
 390         MimeType = DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 391         http_transmit_thing(ChrPtr(MimeType), 0);
 392 }
 393
 394
 395
 396 /*
 397  * convenience function to indicate success
 398  */
 399 void display_success(char *successmessage)
 400 {
 401         convenience_page("007700", "OK", successmessage);
 402 }
 403
 404
 405 /*
 406  * Authorization required page
 407  * This is probably temporary and should be revisited
 408  */
 409 void authorization_required(const char *message)
 410 {
 411         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 412         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(WC->serv_info->serv_humannode));
 413         hprintf("Content-Type: text/html\r\n");
 414         wprintf("<h1>");
 415         wprintf(_("Authorization Required"));
 416         wprintf("</h1>\r\n");
 417         wprintf(_("The resource you requested requires a valid username and password. "
 418                 "You could not be logged in: %s\n"), message);
 419         wDumpContent(0);
 420
 421 }
 422
 423 /*
 424  * Convenience functions to wrap around asynchronous ajax responses
 425  */
 426 void begin_ajax_response(void) {
 427         wcsession *WCC = WC;
 428
 429         FlushStrBuf(WCC->HBuf);
 430         output_headers(0, 0, 0, 0, 0, 0);
 431
 432         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 433                 "Server: %s\r\n"
 434                 "Connection: close\r\n"
 435                 ,
 436                 PACKAGE_STRING);
 437         begin_burst();
 438 }
 439
 440 /*
 441  * print ajax response footer
 442  */
 443 void end_ajax_response(void) {
 444         wDumpContent(0);
 445 }
 446
 447         /* If it's a "force 404" situation then display the error and bail. */
 448 void do_404(void)
 449 {
 450         hprintf("HTTP/1.1 404 Not found\r\n");
 451         hprintf("Content-Type: text/plain\r\n");
 452         wprintf("Not found\r\n");
 453         end_burst();
 454 }
 455 /* TODO: staticdata
 456 {
 457         /* Static content can be sent without connecting to Citadel. * /
 458         is_static = 0;
 459         for (a=0; a<ndirs && ! is_static; ++a) {
 460                 if (!strcasecmp(action, (char*)static_content_dirs[a])) { /* map web to disk location * /
 461                         is_static = 1;
 462                         n_static = a;
 463                 }
 464         }
 465         if (is_static) {
 466                 if (nBackDots < 2)
 467                 {
 468                         snprintf(buf, sizeof buf, "%s/%s/%s/%s/%s/%s/%s/%s",
 469                                  static_dirs[n_static],
 470                                  index[1], index[2], index[3], index[4], index[5], index[6], index[7]);
 471                         for (a=0; a<8; ++a) {
 472                                 if (buf[strlen(buf)-1] == '/') {
 473                                         buf[strlen(buf)-1] = 0;
 474                                 }
 475                         }
 476                         for (a = 0; a < strlen(buf); ++a) {
 477                                 if (isspace(buf[a])) {
 478                                         buf[a] = 0;
 479                                 }
 480                         }
 481                         output_static(buf);
 482                 }
 483                 else
 484                 {
 485                         lprintf(9, "Suspicious request. Ignoring.");
 486                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 487                         hprintf("Content-Type: text/plain\r\n\r\n");
 488                         wprintf("You have sent a malformed or invalid request.\r\n");
 489                         end_burst();
 490                 }
 491                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect * /
 492         }
 493         }*/
 494
 495
 496 /*
 497  * Wraps a Citadel server command in an AJAX transaction.
 498  */
 499 void ajax_servcmd(void)
 500 {
 501         wcsession *WCC = WC;
 502         int Done = 0;
 503         StrBuf *Buf;
 504         char *junk;
 505         size_t len;
 506
 507         begin_ajax_response();
 508         Buf = NewStrBuf();
 509         serv_puts(bstr("g_cmd"));
 510         StrBuf_ServGetln(Buf);
 511         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 512         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 513
 514         switch (GetServerStatus(Buf, NULL)) {
 515         case 8:
 516                 serv_puts("\n\n000");
 517                 if ( (StrLength(Buf)==3) &&
 518                      !strcmp(ChrPtr(Buf), "000")) {
 519                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\000"), 0);
 520                         break;
 521                 }
 522         case 1:
 523                 while (!Done) {
 524                         StrBuf_ServGetln(Buf);
 525                         if ( (StrLength(Buf)==3) &&
 526                              !strcmp(ChrPtr(Buf), "000")) {
 527                                 Done = 1;
 528                         }
 529                         StrBufAppendBuf(WCC->WBuf, Buf, 0);
 530                         StrBufAppendBufPlain(WCC->WBuf, HKEY("\n"), 0);
 531                 }
 532                 break;
 533         case 4:
 534                 text_to_server(bstr("g_input"));
 535                 serv_puts("000");
 536                 break;
 537         case 6:
 538                 len = atol(&ChrPtr(Buf)[4]);
 539                 StrBuf_ServGetBLOBBuffered(Buf, len);
 540                 break;
 541         case 7:
 542                 len = atol(&ChrPtr(Buf)[4]);
 543                 junk = malloc(len);
 544                 memset(junk, 0, len);
 545                 serv_write(junk, len);
 546                 free(junk);
 547         }
 548
 549         end_ajax_response();
 550
 551         /*
 552          * This is kind of an ugly hack, but this is the only place it can go.
 553          * If the command was GEXP, then the instant messenger window must be
 554          * running, so reset the "last_pager_check" watchdog timer so
 555          * that page_popup() doesn't try to open it a second time.
 556          */
 557         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 558                 WCC->last_pager_check = time(NULL);
 559         }
 560         FreeStrBuf(&Buf);
 561 }
 562
 563
 564 /*
 565  * Helper function for the asynchronous check to see if we need
 566  * to open the instant messenger window.
 567  */
 568 void seconds_since_last_gexp(void)
 569 {
 570         char buf[256];
 571
 572         if ( (time(NULL) - WC->last_pager_check) < 30) {
 573                 wprintf("NO\n");
 574         }
 575         else {
 576                 memset(buf, 0, 5);
 577                 serv_puts("NOOP");
 578                 serv_getln(buf, sizeof buf);
 579                 if (buf[3] == '*') {
 580                         wprintf("YES");
 581                 }
 582                 else {
 583                         wprintf("NO");
 584                 }
 585         }
 586 }
 587
 588
 589
 590 void ReadPostData(void)
 591 {
 592         const char *content_end = NULL;
 593         int body_start = 0;
 594         wcsession *WCC = WC;
 595         StrBuf *content = NULL;
 596
 597         content = NewStrBuf();
 598
 599         StrBufPrintf(content,
 600                      "Content-type: %s\n"
 601                      "Content-length: %ld\n\n",
 602                      ChrPtr(WCC->Hdr->ContentType),
 603                              WCC->Hdr->ContentLength);
 604 /*
 605   hprintf("Content-type: %s\n"
 606   "Content-length: %d\n\n",
 607   ContentType, ContentLength);
 608 */
 609         body_start = StrLength(content);
 610
 611         /** Read the entire input data at once. */
 612         client_read_to(&WCC->Hdr->http_sock,
 613                        content,
 614                        WCC->Hdr->ReadBuf, &WCC->Hdr->Pos,
 615                        WCC->Hdr->ContentLength,
 616                        SLEEPING);
 617
 618         if (!strncasecmp(ChrPtr(WCC->Hdr->ContentType), "application/x-www-form-urlencoded", 33)) {
 619                 StrBufCutLeft(content, body_start);
 620                 ParseURLParams(content);
 621         } else if (!strncasecmp(ChrPtr(WCC->Hdr->ContentType), "multipart", 9)) {
 622                 content_end = ChrPtr(content) +
 623                         WCC->Hdr->ContentLength +
 624                         body_start;
 625                 mime_parser(ChrPtr(content), content_end, *upload_handler, NULL, NULL, NULL, 0);
 626         }
 627         FreeStrBuf(&content);
 628 }
 629
 630
 631 /*
 632  * Entry point for WebCit transaction
 633  */
 634 void session_loop(void)
 635 {
 636         int Flags = 0;
 637         int xhttp;
 638         StrBuf *Buf;
 639
 640         char buf[SIZ];
 641
 642         /*
 643          * We stuff these with the values coming from the client cookies,
 644          * so we can use them to reconnect a timed out session if we have to.
 645          */
 646         wcsession *WCC;
 647
 648
 649         Buf = NewStrBuf();
 650
 651         WCC= WC;
 652
 653         WCC->upload_length = 0;
 654         WCC->upload = NULL;
 655         WCC->is_mobile = 0;
 656         WCC->trailing_javascript = NewStrBuf();
 657         WCC->Hdr->nWildfireHeaders = 0;
 658         if (WCC->Hdr->Handler != NULL)
 659                 Flags = WCC->Hdr->Handler->Flags; /* so we can temporarily add our own... */
 660         /** Figure out the action * /
 661         index[0] = action;
 662         sizes[0] = sizeof action;
 663         for (a=1; a<9; a++)
 664         {
 665                 index[a] = arg[a-1];
 666                 sizes[a] = sizeof arg[a-1];
 667         }
 668         nBackDots = 0;
 669         nEmpty = 0;
 670 /*
 671   for ( a = 0; a < 9; ++a)
 672   {
 673   extract_token(index[a], ChrPtr(ReqLine), a + 1, '/', sizes[a]);
 674   if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
 675   if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
 676   if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
 677   if ((index[a][0] == '.') && (index[a][1] == '.'))
 678   nBackDots++;
 679   if (index[a][0] == '\0')
 680   nEmpty++;
 681   }
 682 */
 683         if (WCC->Hdr->ContentLength > 0) {
 684                 ReadPostData();
 685         }
 686
 687         /* If there are variables in the URL, we must grab them now */
 688         if (WCC->Hdr->PlainArgs != NULL)
 689                 ParseURLParams(WCC->Hdr->PlainArgs);
 690
 691         /* If the client sent a nonce that is incorrect, kill the request. */
 692         if (havebstr("nonce")) {
 693                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 694                         bstr("nonce"), WCC->nonce);
 695                 if (ibstr("nonce") != WCC->nonce) {
 696                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 697                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 698                         hprintf("Content-Type: text/plain\r\n\r\n");
 699                         wprintf("Security check failed.\r\n");
 700                         end_burst();
 701                         goto SKIP_ALL_THIS_CRAP;
 702                 }
 703         }
 704
 705         /*
 706          * If we're not connected to a Citadel server, try to hook up the
 707          * connection now.
 708          */
 709         if (!WCC->connected) {
 710                 if (GetConnected ())
 711                         goto SKIP_ALL_THIS_CRAP;
 712         }
 713
 714
 715         /*
 716          * If we're not logged in, but we have HTTP Authentication data,
 717          * try logging in to Citadel using that.
 718          */
 719         if ((!WCC->logged_in)
 720             && (StrLength(WCC->Hdr->c_username) > 0)
 721             && (StrLength(WCC->Hdr->c_password) > 0))
 722         {
 723                 FlushStrBuf(Buf);
 724                 serv_printf("USER %s", ChrPtr(WCC->Hdr->c_username));
 725                 StrBuf_ServGetln(Buf);
 726                 if (GetServerStatus(Buf, NULL) == 3) {
 727                         serv_printf("PASS %s", ChrPtr(WCC->Hdr->c_password));
 728                         StrBuf_ServGetln(Buf);
 729                         if (GetServerStatus(Buf, NULL) == 2) {
 730                                 become_logged_in(WCC->Hdr->c_username,
 731                                                  WCC->Hdr->c_password, Buf);
 732                         } else {
 733                                 /* Should only display when password is wrong */
 734                                 authorization_required(&buf[4]);
 735                                 FreeStrBuf(&Buf);
 736                                 goto SKIP_ALL_THIS_CRAP;
 737                         }
 738                 }
 739         }
 740
 741         xhttp = (WCC->Hdr->eReqType != eGET) &&
 742                 (WCC->Hdr->eReqType != ePOST) &&
 743                 (WCC->Hdr->eReqType != eHEAD);
 744
 745         /*
 746          * If we're not logged in, but we have username and password cookies
 747          * supplied by the browser, try using them to log in.
 748          */
 749         if ((!WCC->logged_in)
 750            && (StrLength(WCC->Hdr->c_username)>0)
 751            && (StrLength(WCC->Hdr->c_password)>0)) {
 752                 ReEstablish_Session();
 753         }
 754
 755         /*
 756          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 757          * prior to doing anything else.
 758          */
 759         if (havebstr("gotofirst")) {
 760                 int ret;
 761                 ret = gotoroom(sbstr("gotofirst"));     /* do this quietly to avoid session output! */
 762                 if (ret != 0)
 763                         lprintf(1, "GOTOFIRST: Unable to change to [%s]; Reason: %d\n", bstr("gotofirst"), ret);
 764         }
 765
 766         if (WCC->Hdr->Handler != NULL) {
 767                 if (!WCC->logged_in && ((WCC->Hdr->Handler->Flags & ANONYMOUS) == 0)) {
 768                         display_login(NULL);
 769                 }
 770                 else {
 771 /*
 772                         if((WCC->Hdr->Handler->Flags & NEED_URL)) {
 773                                 if (WCC->UrlFragment1 == NULL)
 774                                         WCC->UrlFragment1 = NewStrBuf();
 775                                 if (WCC->UrlFragment2 == NULL)
 776                                         WCC->UrlFragment2 = NewStrBuf();
 777                                 if (WCC->UrlFragment3 == NULL)
 778                                         WCC->UrlFragment3 = NewStrBuf();
 779                                 if (WCC->UrlFragment4 == NULL)
 780                                         WCC->UrlFragment4 = NewStrBuf();
 781                                 StrBufPlain(WCC->UrlFragment1, index[0], -1);
 782                                 StrBufPlain(WCC->UrlFragment2, index[1], -1);
 783                                 StrBufPlain(WCC->UrlFragment3, index[2], -1);
 784                                 StrBufPlain(WCC->UrlFragment4, index[3], -1);
 785                         }
 786 */
 787                         if ((WCC->Hdr->Handler->Flags & AJAX) != 0)
 788                                 begin_ajax_response();
 789                         WCC->Hdr->Handler->F();
 790                         if ((WCC->Hdr->Handler->Flags & AJAX) != 0)
 791                                 end_ajax_response();
 792                 }
 793         }
 794         /* When all else fais, display the main menu. */
 795         else {
 796                 if (!WCC->logged_in)
 797                         display_login(NULL);
 798                 else
 799                         display_main_menu();
 800         }
 801
 802 SKIP_ALL_THIS_CRAP:
 803         if (WCC->SavePrefsToServer) {
 804                 save_preferences();
 805                 WCC->SavePrefsToServer = 0;
 806         }
 807         FreeStrBuf(&Buf);
 808         fflush(stdout);
 809         WCC->Hdr->http_host = NULL;
 810 }
 811
 812
 813 /*
 814  * Replacement for sleep() that uses select() in order to avoid SIGALRM
 815  */
 816 void sleeeeeeeeeep(int seconds)
 817 {
 818         struct timeval tv;
 819
 820         tv.tv_sec = seconds;
 821         tv.tv_usec = 0;
 822         select(0, NULL, NULL, NULL, &tv);
 823 }
 824
 825
 826 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
 827 {
 828         wcsession *WCC = WC;
 829         if (WCC != NULL)
 830                 return ((!IsEmptyStr(WCC->ImportantMessage)) ||
 831                         (StrLength(WCC->ImportantMsg) > 0));
 832         else
 833                 return 0;
 834 }
 835
 836 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
 837 {
 838         wcsession *WCC = WC;
 839
 840         if (WCC != NULL) {
 841                 if (!IsEmptyStr(WCC->ImportantMessage)) {
 842                         StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
 843                         WCC->ImportantMessage[0] = '\0';
 844                 }
 845                 else if (StrLength(WCC->ImportantMsg) > 0) {
 846                         StrEscAppend(Target, WCC->ImportantMsg, NULL, 0, 0);
 847                         FlushStrBuf(WCC->ImportantMsg);
 848                 }
 849         }
 850 }
 851
 852 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
 853 {
 854         wcsession *WCC = WC;
 855
 856         if (WCC != NULL)
 857                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
 858 }
 859
 860 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
 861 {
 862         StrBufAppendBuf(Target,
 863                         csslocal, 0);
 864 }
 865
 866 extern char static_local_dir[PATH_MAX];
 867
 868
 869         /* TODO: integrate this into the static startup logic
 870
 871          * While we're at it, gracefully handle requests for the
 872          * robots.txt and favicon.ico files.
 873          * /
 874         if ((StrLength(ReqLine) >= 11) &&
 875             !strncasecmp(ChrPtr(ReqLine), "/robots.txt", 11)) {
 876                 StrBufPlain(ReqLine,
 877                             HKEY("/static/robots.txt"
 878                                  "?force_close_session=yes HTTP/1.1"));
 879                 Hdr.eReqType = eGET;
 880         }
 881         else if ((StrLength(ReqLine) >= 11) &&
 882                  !strncasecmp(ChrPtr(ReqLine), "/favicon.ico", 12)) {
 883                 StrBufPlain(ReqLine, HKEY("/static/favicon.ico"));
 884                 Hdr.eReqType = eGET;
 885         }
 886
 887 */
 888 void
 889 InitModule_WEBCIT
 890 (void)
 891 {
 892         char dir[SIZ];
 893         WebcitAddUrlHandler(HKEY("404"), do_404, ANONYMOUS|COOKIEUNNEEDED);
 894         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 895
 896         WebcitAddUrlHandler(HKEY("robots.txt"), output_static, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 897         WebcitAddUrlHandler(HKEY("favicon.ico"), output_static, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 898         WebcitAddUrlHandler(HKEY("static"), output_static, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 899         WebcitAddUrlHandler(HKEY("static.local"), output_static, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 900         WebcitAddUrlHandler(HKEY("tinymce"), output_static, ANONYMOUS|COOKIEUNNEEDED|ISSTATIC);
 901
 902         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS);
 903         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
 904         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX|LOGCHATTY);
 905         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
 906
 907         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
 908         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, CTX_NONE);
 909         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
 910         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, CTX_NONE);
 911
 912         snprintf(dir, SIZ, "%s/static.local/webcit.css", static_local_dir);
 913         if (!access(dir, R_OK)) {
 914                 lprintf(9, "Using local Stylesheet [%s]\n", dir);
 915                 csslocal = NewStrBufPlain(HKEY("<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\">"));
 916         }
 917         else
 918                 lprintf(9, "Didn't find site local Stylesheet [%s]\n", dir);
 919
 920 }
 921
 922 void
 923 ServerStartModule_WEBCIT
 924 (void)
 925 {
 926         HandlerHash = NewHash(1, NULL);
 927 }
 928
 929
 930 void
 931 ServerShutdownModule_WEBCIT
 932 (void)
 933 {
 934         FreeStrBuf(&csslocal);
 935         DeleteHash(&HandlerHash);
 936 }
 937
 938
 939
 940 void
 941 SessionNewModule_WEBCIT
 942 (wcsession *sess)
 943 {
 944         sess->ImportantMsg = NewStrBuf();
 945         sess->WBuf = NewStrBuf();
 946         sess->HBuf = NewStrBuf();
 947 }
 948
 949 void
 950 SessionDetachModule_WEBCIT
 951 (wcsession *sess)
 952 {
 953         DeleteHash(&sess->Hdr->urlstrings);// TODO?
 954         if (sess->upload_length > 0) {
 955                 free(sess->upload);
 956                 sess->upload_length = 0;
 957         }
 958         FreeStrBuf(&sess->trailing_javascript);
 959
 960         if (StrLength(sess->WBuf) > SIZ * 30) /* Bigger than 120K? release. */
 961         {
 962                 FreeStrBuf(&sess->WBuf);
 963                 sess->WBuf = NewStrBuf();
 964         }
 965         else
 966                 FlushStrBuf(sess->WBuf);
 967         FlushStrBuf(sess->HBuf);
 968 }
 969
 970 void
 971 SessionDestroyModule_WEBCIT
 972 (wcsession *sess)
 973 {
 974         FreeStrBuf(&sess->WBuf);
 975         FreeStrBuf(&sess->HBuf);
 976         /*
 977         FreeStrBuf(&sess->UrlFragment1);
 978         FreeStrBuf(&sess->UrlFragment2);
 979         FreeStrBuf(&sess->UrlFragment3);
 980         FreeStrBuf(&sess->UrlFragment4);
 981         */
 982         FreeStrBuf(&sess->ImportantMsg);
 983 }
 984