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 #include <stdarg.h>
   9 #define SHOW_ME_VAPPEND_PRINTF
  10 #include "webcit.h"
  11 #include "groupdav.h"
  12 #include "webserver.h"
  13
  14 #include <stdio.h>
  15 #include <stdarg.h>
  16
  17 /*
  18  * String to unset the cookie.
  19  * Any date "in the past" will work, so I chose my birthday, right down to
  20  * the exact minute.  :)
  21  */
  22 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  23
  24 HashList *HandlerHash = NULL;
  25
  26 void WebcitAddUrlHandler(const char * UrlString,
  27                          long UrlSLen,
  28                          WebcitHandlerFunc F,
  29                          long Flags)
  30 {
  31         WebcitHandler *NewHandler;
  32
  33         if (HandlerHash == NULL)
  34                 HandlerHash = NewHash(1, NULL);
  35
  36         NewHandler = (WebcitHandler*) malloc(sizeof(WebcitHandler));
  37         NewHandler->F = F;
  38         NewHandler->Flags = Flags;
  39         Put(HandlerHash, UrlString, UrlSLen, NewHandler, NULL);
  40 }
  41
  42 /*
  43  * remove escaped strings from i.e. the url string (like %20 for blanks)
  44  */
  45 long unescape_input(char *buf)
  46 {
  47         int a, b;
  48         char hex[3];
  49         long buflen;
  50         long len;
  51
  52         buflen = strlen(buf);
  53
  54         while ((buflen > 0) && (isspace(buf[buflen - 1]))){
  55                 buf[buflen - 1] = 0;
  56                 buflen --;
  57         }
  58
  59         a = 0;
  60         while (a < buflen) {
  61                 if (buf[a] == '+')
  62                         buf[a] = ' ';
  63                 if (buf[a] == '%') {
  64                         /* don't let % chars through, rather truncate the input. */
  65                         if (a + 2 > buflen) {
  66                                 buf[a] = '\0';
  67                                 buflen = a;
  68                         }
  69                         else {
  70                                 hex[0] = buf[a + 1];
  71                                 hex[1] = buf[a + 2];
  72                                 hex[2] = 0;
  73                                 b = 0;
  74                                 sscanf(hex, "%02x", &b);
  75                                 buf[a] = (char) b;
  76                                 len = buflen - a - 2;
  77                                 if (len > 0)
  78                                         memmove(&buf[a + 1], &buf[a + 3], len);
  79
  80                                 buflen -=2;
  81                         }
  82                 }
  83                 a++;
  84         }
  85         return a;
  86 }
  87
  88 void free_url(void *U)
  89 {
  90         urlcontent *u = (urlcontent*) U;
  91         FreeStrBuf(&u->url_data);
  92         free(u);
  93 }
  94
  95 /*
  96  * Extract variables from the URL.
  97  */
  98 void addurls(StrBuf *url)
  99 {
 100         const char *aptr, *bptr, *eptr, *up;
 101 ///     char *buf;
 102         int len, keylen;
 103         urlcontent *u;
 104         struct wcsession *WCC = WC;
 105
 106         if (WCC->urlstrings == NULL)
 107                 WCC->urlstrings = NewHash(1, NULL);
 108 //      buf = (char*) malloc (ulen + 1);
 109 //      memcpy(buf, url, ulen);
 110 ///     buf[ulen] = '\0';
 111         eptr = ChrPtr(url) + StrLength(url);
 112         up = ChrPtr(url);
 113         while ((up < eptr) && (!IsEmptyStr(up))) {
 114                 aptr = up;
 115                 while ((aptr < eptr) && (*aptr != '\0') && (*aptr != '='))
 116                         aptr++;
 117                 if (*aptr != '=') {
 118                         ///free(buf);
 119                         return;
 120                 }
 121                 ///*aptr = '\0';
 122                 aptr++;
 123                 bptr = aptr;
 124                 while ((bptr < eptr) && (*bptr != '\0')
 125                       && (*bptr != '&') && (*bptr != '?') && (*bptr != ' ')) {
 126                         bptr++;
 127                 }
 128                 //*bptr = '\0';
 129                 keylen = aptr - up - 1; /* -1 -> '=' */
 130                 if(keylen > sizeof(u->url_key)) {
 131                         lprintf(1, "URLkey to long! [%s]", up);
 132                         continue;
 133                 }
 134
 135                 u = (urlcontent *) malloc(sizeof(urlcontent));
 136                 memcpy(u->url_key, up, keylen);
 137                 u->url_key[keylen] = '\0';
 138                 if (keylen < 0) {
 139                         lprintf(1, "URLkey to long! [%s]", up);
 140                         free(u);
 141                         continue;
 142                 }
 143
 144                 Put(WCC->urlstrings, u->url_key, keylen, u, free_url);
 145                 len = bptr - aptr;
 146                 u->url_data = NewStrBufPlain(aptr, len);
 147                 StrBufUnescape(u->url_data, 1);
 148
 149                 up = bptr;
 150                 ++up;
 151 #ifdef DEBUG_URLSTRINGS
 152                 lprintf(9, "%s = [%ld]  %s\n", u->url_key, u->url_data_size, ChrPtr(u->url_data));
 153 #endif
 154         }
 155         //free(buf);
 156 }
 157
 158 /*
 159  * free urlstring memory
 160  */
 161 void free_urls(void)
 162 {
 163         DeleteHash(&WC->urlstrings);
 164 }
 165
 166 /*
 167  * Diagnostic function to display the contents of all variables
 168  */
 169
 170 void dump_vars(void)
 171 {
 172         struct wcsession *WCC = WC;
 173         urlcontent *u;
 174         void *U;
 175         long HKLen;
 176         const char *HKey;
 177         HashPos *Cursor;
 178
 179         Cursor = GetNewHashPos ();
 180         while (GetNextHashPos(WCC->urlstrings, Cursor, &HKLen, &HKey, &U)) {
 181                 u = (urlcontent*) U;
 182                 wprintf("%38s = %s\n", u->url_key, ChrPtr(u->url_data));
 183         }
 184 }
 185
 186 /*
 187  * Return the value of a variable supplied to the current web page (from the url or a form)
 188  */
 189
 190 const char *XBstr(char *key, size_t keylen, size_t *len)
 191 {
 192         void *U;
 193
 194         if ((WC->urlstrings != NULL) &&
 195             GetHash(WC->urlstrings, key, keylen, &U)) {
 196                 *len = StrLength(((urlcontent *)U)->url_data);
 197                 return ChrPtr(((urlcontent *)U)->url_data);
 198         }
 199         else {
 200                 *len = 0;
 201                 return ("");
 202         }
 203 }
 204
 205 const char *XBSTR(char *key, size_t *len)
 206 {
 207         void *U;
 208
 209         if ((WC->urlstrings != NULL) &&
 210             GetHash(WC->urlstrings, key, strlen (key), &U)){
 211                 *len = StrLength(((urlcontent *)U)->url_data);
 212                 return ChrPtr(((urlcontent *)U)->url_data);
 213         }
 214         else {
 215                 *len = 0;
 216                 return ("");
 217         }
 218 }
 219
 220
 221 const char *BSTR(char *key)
 222 {
 223         void *U;
 224
 225         if ((WC->urlstrings != NULL) &&
 226             GetHash(WC->urlstrings, key, strlen (key), &U))
 227                 return ChrPtr(((urlcontent *)U)->url_data);
 228         else
 229                 return ("");
 230 }
 231
 232 const char *Bstr(char *key, size_t keylen)
 233 {
 234         void *U;
 235
 236         if ((WC->urlstrings != NULL) &&
 237             GetHash(WC->urlstrings, key, keylen, &U))
 238                 return ChrPtr(((urlcontent *)U)->url_data);
 239         else
 240                 return ("");
 241 }
 242
 243 const StrBuf *SBSTR(const char *key)
 244 {
 245         void *U;
 246
 247         if ((WC->urlstrings != NULL) &&
 248             GetHash(WC->urlstrings, key, strlen (key), &U))
 249                 return ((urlcontent *)U)->url_data;
 250         else
 251                 return NULL;
 252 }
 253
 254 const StrBuf *SBstr(const char *key, size_t keylen)
 255 {
 256         void *U;
 257
 258         if ((WC->urlstrings != NULL) &&
 259             GetHash(WC->urlstrings, key, keylen, &U))
 260                 return ((urlcontent *)U)->url_data;
 261         else
 262                 return NULL;
 263 }
 264
 265 long LBstr(char *key, size_t keylen)
 266 {
 267         void *U;
 268
 269         if ((WC->urlstrings != NULL) &&
 270             GetHash(WC->urlstrings, key, keylen, &U))
 271                 return StrTol(((urlcontent *)U)->url_data);
 272         else
 273                 return (0);
 274 }
 275
 276 long LBSTR(char *key)
 277 {
 278         void *U;
 279
 280         if ((WC->urlstrings != NULL) &&
 281             GetHash(WC->urlstrings, key, strlen(key), &U))
 282                 return StrTol(((urlcontent *)U)->url_data);
 283         else
 284                 return (0);
 285 }
 286
 287 int IBstr(char *key, size_t keylen)
 288 {
 289         void *U;
 290
 291         if ((WC->urlstrings != NULL) &&
 292             GetHash(WC->urlstrings, key, keylen, &U))
 293                 return StrTol(((urlcontent *)U)->url_data);
 294         else
 295                 return (0);
 296 }
 297
 298 int IBSTR(char *key)
 299 {
 300         void *U;
 301
 302         if ((WC->urlstrings != NULL) &&
 303             GetHash(WC->urlstrings, key, strlen(key), &U))
 304                 return StrToi(((urlcontent *)U)->url_data);
 305         else
 306                 return (0);
 307 }
 308
 309 int HaveBstr(char *key, size_t keylen)
 310 {
 311         void *U;
 312
 313         if ((WC->urlstrings != NULL) &&
 314             GetHash(WC->urlstrings, key, keylen, &U))
 315                 return (StrLength(((urlcontent *)U)->url_data) != 0);
 316         else
 317                 return (0);
 318 }
 319
 320 int HAVEBSTR(char *key)
 321 {
 322         void *U;
 323
 324         if ((WC->urlstrings != NULL) &&
 325             GetHash(WC->urlstrings, key, strlen(key), &U))
 326                 return (StrLength(((urlcontent *)U)->url_data) != 0);
 327         else
 328                 return (0);
 329 }
 330
 331
 332 int YesBstr(char *key, size_t keylen)
 333 {
 334         void *U;
 335
 336         if ((WC->urlstrings != NULL) &&
 337             GetHash(WC->urlstrings, key, keylen, &U))
 338                 return strcmp( ChrPtr(((urlcontent *)U)->url_data), "yes") == 0;
 339         else
 340                 return (0);
 341 }
 342
 343 int YESBSTR(char *key)
 344 {
 345         void *U;
 346
 347         if ((WC->urlstrings != NULL) &&
 348             GetHash(WC->urlstrings, key, strlen(key), &U))
 349                 return strcmp( ChrPtr(((urlcontent *)U)->url_data), "yes") == 0;
 350         else
 351                 return (0);
 352 }
 353
 354 /*
 355  * web-printing funcion. uses our vsnprintf wrapper
 356  */
 357 void wprintf(const char *format,...)
 358 {
 359         struct wcsession *WCC = WC;
 360         va_list arg_ptr;
 361
 362         if (WCC->WBuf == NULL)
 363                 WCC->WBuf = NewStrBuf();
 364
 365         va_start(arg_ptr, format);
 366         StrBufVAppendPrintf(WCC->WBuf, format, arg_ptr);
 367         va_end(arg_ptr);
 368
 369 ///     if (StrLength(WCC-WBuf) > 2048)
 370                 ///client_write(wbuf, strlen(wbuf));
 371 }
 372
 373 /*
 374  * http-header-printing funcion. uses our vsnprintf wrapper
 375  */
 376 void hprintf(const char *format,...)
 377 {
 378         struct wcsession *WCC = WC;
 379         va_list arg_ptr;
 380
 381         va_start(arg_ptr, format);
 382         StrBufVAppendPrintf(WCC->HBuf, format, arg_ptr);
 383         va_end(arg_ptr);
 384
 385 ///     if (StrLength(WCC-WBuf) > 2048)
 386                 ///client_write(wbuf, strlen(wbuf));
 387 }
 388
 389
 390 /*
 391  * wrap up an HTTP session, closes tags, etc.
 392  *
 393  * print_standard_html_footer should be set to:
 394  * 0 to transmit only,
 395  * 1 to append the main menu and closing tags,
 396  * 2 to append the closing tags only.
 397  */
 398 void wDumpContent(int print_standard_html_footer)
 399 {
 400         if (print_standard_html_footer) {
 401                 wprintf("</div>\n");    /* end of "text" div */
 402                 do_template("trailing", NULL);
 403         }
 404
 405         /* If we've been saving it all up for one big output burst,
 406          * go ahead and do that now.
 407          */
 408         end_burst();
 409 }
 410
 411
 412
 413 /*
 414  * Copy a string, escaping characters which have meaning in HTML.
 415  *
 416  * target              target buffer
 417  * strbuf              source buffer
 418  * nbsp                        If nonzero, spaces are converted to non-breaking spaces.
 419  * nolinebreaks                if set, linebreaks are removed from the string.
 420  */
 421 long stresc(char *target, long tSize, char *strbuf, int nbsp, int nolinebreaks)
 422 {
 423         char *aptr, *bptr, *eptr;
 424
 425         *target = '\0';
 426         aptr = strbuf;
 427         bptr = target;
 428         eptr = target + tSize - 6; // our biggest unit to put in...
 429
 430
 431         while ((bptr < eptr) && !IsEmptyStr(aptr) ){
 432                 if (*aptr == '<') {
 433                         memcpy(bptr, "&lt;", 4);
 434                         bptr += 4;
 435                 }
 436                 else if (*aptr == '>') {
 437                         memcpy(bptr, "&gt;", 4);
 438                         bptr += 4;
 439                 }
 440                 else if (*aptr == '&') {
 441                         memcpy(bptr, "&amp;", 5);
 442                         bptr += 5;
 443                 }
 444                 else if (*aptr == '\"') {
 445                         memcpy(bptr, "&quot;", 6);
 446                         bptr += 6;
 447                 }
 448                 else if (*aptr == '\'') {
 449                         memcpy(bptr, "&#39;", 5);
 450                         bptr += 5;
 451                 }
 452                 else if (*aptr == LB) {
 453                         *bptr = '<';
 454                         bptr ++;
 455                 }
 456                 else if (*aptr == RB) {
 457                         *bptr = '>';
 458                         bptr ++;
 459                 }
 460                 else if (*aptr == QU) {
 461                         *bptr ='"';
 462                         bptr ++;
 463                 }
 464                 else if ((*aptr == 32) && (nbsp == 1)) {
 465                         memcpy(bptr, "&nbsp;", 6);
 466                         bptr += 6;
 467                 }
 468                 else if ((*aptr == '\n') && (nolinebreaks)) {
 469                         *bptr='\0';     /* nothing */
 470                 }
 471                 else if ((*aptr == '\r') && (nolinebreaks)) {
 472                         *bptr='\0';     /* nothing */
 473                 }
 474                 else{
 475                         *bptr = *aptr;
 476                         bptr++;
 477                 }
 478                 aptr ++;
 479         }
 480         *bptr = '\0';
 481         if ((bptr = eptr - 1 ) && !IsEmptyStr(aptr) )
 482                 return -1;
 483         return (bptr - target);
 484 }
 485
 486
 487 void escputs1(char *strbuf, int nbsp, int nolinebreaks)
 488 {
 489         StrEscAppend(WC->WBuf, NULL, strbuf, nbsp, nolinebreaks);
 490 }
 491
 492 void StrEscputs1(const StrBuf *strbuf, int nbsp, int nolinebreaks)
 493 {
 494         StrEscAppend(WC->WBuf, strbuf, NULL, nbsp, nolinebreaks);
 495 }
 496
 497 /*
 498  * static wrapper for ecsputs1
 499  */
 500 void escputs(char *strbuf)
 501 {
 502         escputs1(strbuf, 0, 0);
 503 }
 504
 505
 506 /*
 507  * static wrapper for ecsputs1
 508  */
 509 void StrEscPuts(const StrBuf *strbuf)
 510 {
 511         StrEscputs1(strbuf, 0, 0);
 512 }
 513
 514
 515 /*
 516  * urlescape buffer and print it to the client
 517  */
 518 void urlescputs(const char *strbuf)
 519 {
 520         StrBufUrlescAppend(WC->WBuf, NULL, strbuf);
 521 }
 522
 523 /*
 524  * urlescape buffer and print it to the client
 525  */
 526 void UrlescPutStrBuf(const StrBuf *strbuf)
 527 {
 528         StrBufUrlescAppend(WC->WBuf, strbuf, NULL);
 529 }
 530
 531 /**
 532  * urlescape buffer and print it as header
 533  */
 534 void hurlescputs(const char *strbuf)
 535 {
 536         StrBufUrlescAppend(WC->HBuf, NULL, strbuf);
 537 }
 538
 539
 540 /*
 541  * Copy a string, escaping characters for JavaScript strings.
 542  */
 543 void jsesc(char *target, size_t tlen, char *strbuf)
 544 {
 545         int len;
 546         char *tend;
 547         char *send;
 548         char *tptr;
 549         char *sptr;
 550
 551         target[0]='\0';
 552         len = strlen (strbuf);
 553         send = strbuf + len;
 554         tend = target + tlen;
 555         sptr = strbuf;
 556         tptr = target;
 557
 558         while (!IsEmptyStr(sptr) &&
 559                (sptr < send) &&
 560                (tptr < tend)) {
 561
 562                 if (*sptr == '<')
 563                         *tptr = '[';
 564                 else if (*sptr == '>')
 565                         *tptr = ']';
 566                 else if (*sptr == '\'') {
 567                         if (tend - tptr < 3)
 568                                 return;
 569                         *(tptr++) = '\\';
 570                         *tptr = '\'';
 571                 }
 572                 else if (*sptr == '"') {
 573                         if (tend - tptr < 8)
 574                                 return;
 575                         *(tptr++) = '&';
 576                         *(tptr++) = 'q';
 577                         *(tptr++) = 'u';
 578                         *(tptr++) = 'o';
 579                         *(tptr++) = 't';
 580                         *tptr = ';';
 581                 }
 582                 else if (*sptr == '&') {
 583                         if (tend - tptr < 7)
 584                                 return;
 585                         *(tptr++) = '&';
 586                         *(tptr++) = 'a';
 587                         *(tptr++) = 'm';
 588                         *(tptr++) = 'p';
 589                         *tptr = ';';
 590                 } else {
 591                         *tptr = *sptr;
 592                 }
 593                 tptr++; sptr++;
 594         }
 595         *tptr = '\0';
 596 }
 597
 598 /*
 599  * escape and print javascript
 600  */
 601 void jsescputs(char *strbuf)
 602 {
 603         char outbuf[SIZ];
 604
 605         jsesc(outbuf, SIZ, strbuf);
 606         wprintf("%s", outbuf);
 607 }
 608
 609 /*
 610  * print a string to the client after cleaning it with msgesc() and stresc()
 611  */
 612 void msgescputs1( char *strbuf)
 613 {
 614         StrBuf *OutBuf = NewStrBuf();
 615
 616         if ((strbuf == NULL) || IsEmptyStr(strbuf))
 617                 return;
 618         StrMsgEscAppend(OutBuf, NULL, strbuf);
 619         StrEscAppend(WC->WBuf, OutBuf, NULL, 0, 0);
 620         FreeStrBuf(&OutBuf);
 621 }
 622
 623 /*
 624  * print a string to the client after cleaning it with msgesc()
 625  */
 626 void msgescputs(char *strbuf) {
 627         if ((strbuf != NULL) && !IsEmptyStr(strbuf))
 628                 StrMsgEscAppend(WC->WBuf, NULL, strbuf);
 629 }
 630
 631
 632
 633
 634 /*
 635  * Output HTTP headers and leading HTML for a page
 636  */
 637 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 638                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 639
 640                         int do_room_banner,     /* 0=no, 1=yes,
 641                                                  * 2 = I'm going to embed my own, so don't open the
 642                                                  *     <div id="content"> either.
 643                                                  */
 644
 645                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 646                         int suppress_check,     /* 1 = suppress check for instant messages          */
 647                         int cache               /* 1 = allow browser to cache this page             */
 648 ) {
 649         char cookie[1024];
 650         char httpnow[128];
 651
 652         hprintf("HTTP/1.1 200 OK\n");
 653         http_datestring(httpnow, sizeof httpnow, time(NULL));
 654
 655         if (do_httpheaders) {
 656                 hprintf("Content-type: text/html; charset=utf-8\r\n"
 657                         "Server: %s / %s\n"
 658                         "Connection: close\r\n",
 659                         PACKAGE_STRING, serv_info.serv_software
 660                 );
 661         }
 662
 663         if (cache) {
 664                 char httpTomorow[128];
 665
 666                 http_datestring(httpTomorow, sizeof httpTomorow,
 667                                 time(NULL) + 60 * 60 * 24 * 2);
 668
 669                 hprintf("Pragma: public\r\n"
 670                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 671                         "Last-modified: %s\r\n"
 672                         "Expires: %s\r\n",
 673                         httpnow,
 674                         httpTomorow
 675                 );
 676         }
 677         else {
 678                 hprintf("Pragma: no-cache\r\n"
 679                         "Cache-Control: no-store\r\n"
 680                         "Expires: -1\r\n"
 681                 );
 682         }
 683
 684         stuff_to_cookie(cookie, 1024, WC->wc_session, WC->wc_username,
 685                         WC->wc_password, WC->wc_roomname);
 686
 687         if (unset_cookies) {
 688                 hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 689         } else {
 690                 hprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 691                 if (server_cookie != NULL) {
 692                         hprintf("%s\n", server_cookie);
 693                 }
 694         }
 695
 696         if (do_htmlhead) {
 697                 begin_burst();
 698                 if (!access("static.local/webcit.css", R_OK)) {
 699                         svprintf(HKEY("CSSLOCAL"), WCS_STRING,
 700                            "<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\">"
 701                         );
 702                 }
 703                 do_template("head", NULL);
 704         }
 705
 706         /* ICONBAR */
 707         if (do_htmlhead) {
 708                 begin_burst();
 709
 710                 /* check for ImportantMessages (these display in a div overlaying the main screen) */
 711                 if (!IsEmptyStr(WC->ImportantMessage)) {
 712                         wprintf("<div id=\"important_message\">\n"
 713                                 "<span class=\"imsg\">");
 714                         escputs(WC->ImportantMessage);
 715                         wprintf("</span><br />\n"
 716                                 "</div>\n"
 717                                 "<script type=\"text/javascript\">\n"
 718                                 "        setTimeout('hide_imsg_popup()', 5000); \n"
 719                                 "</script>\n");
 720                         WC->ImportantMessage[0] = 0;
 721                 }
 722
 723                 if ( (WC->logged_in) && (!unset_cookies) ) {
 724                         wprintf("<div id=\"iconbar\">");
 725                         do_selected_iconbar();
 726                         /** check for instant messages (these display in a new window) */
 727                         page_popup();
 728                         wprintf("</div>");
 729                 }
 730
 731                 if (do_room_banner == 1) {
 732                         wprintf("<div id=\"banner\">\n");
 733                         embed_room_banner(NULL, navbar_default);
 734                         wprintf("</div>\n");
 735                 }
 736         }
 737
 738         if (do_room_banner == 1) {
 739                 wprintf("<div id=\"content\">\n");
 740         }
 741 }
 742
 743
 744 /*
 745  * Generic function to do an HTTP redirect.  Easy and fun.
 746  */
 747 void http_redirect(const char *whichpage) {
 748         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 749         hprintf("Location: %s\r\n", whichpage);
 750         hprintf("URI: %s\r\n", whichpage);
 751         hprintf("Content-type: text/html; charset=utf-8\r\n");
 752         wprintf("<html><body>");
 753         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 754         wprintf("</body></html>\n");
 755         end_burst();
 756 }
 757
 758
 759
 760 /*
 761  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 762  */
 763 void http_transmit_thing(const char *content_type,
 764                          int is_static) {
 765
 766         output_headers(0, 0, 0, 0, 0, is_static);
 767
 768         hprintf("Content-type: %s\r\n"
 769                 "Server: %s\r\n"
 770                 "Connection: close\r\n",
 771                 content_type,
 772                 PACKAGE_STRING);
 773
 774         end_burst();
 775 }
 776
 777 /*
 778  * print menu box like used in the floor view or admin interface.
 779  * This function takes pair of strings as va_args,
 780  * Title        Title string of the box
 781  * Class        CSS Class for the box
 782  * nLines       How many string pairs should we print? (URL, UrlText)
 783  * ...          Pairs of URL Strings and their Names
 784  */
 785 void print_menu_box(char* Title, char *Class, int nLines, ...)
 786 {
 787         va_list arg_list;
 788         long i;
 789
 790         svput("BOXTITLE", WCS_STRING, Title);
 791         do_template("beginbox", NULL);
 792
 793         wprintf("<ul class=\"%s\">", Class);
 794
 795         va_start(arg_list, nLines);
 796         for (i = 0; i < nLines; ++i)
 797         {
 798                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 799                 wprintf((char *) va_arg(arg_list, char *));
 800                 wprintf("</a></li>\n");
 801         }
 802         va_end (arg_list);
 803
 804         wprintf("</a></li>\n");
 805
 806         wprintf("</ul>");
 807
 808         do_template("endbox", NULL);
 809 }
 810
 811
 812 /*
 813  * dump out static pages from disk
 814  */
 815 void output_static(char *what)
 816 {
 817         int fd;
 818         struct stat statbuf;
 819         off_t bytes;
 820         off_t count = 0;
 821         const char *content_type;
 822         int len;
 823         const char *Err;
 824
 825         fd = open(what, O_RDONLY);
 826         if (fd <= 0) {
 827                 lprintf(9, "output_static('%s')  -- NOT FOUND --\n", what);
 828                 hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 829                 hprintf("Content-Type: text/plain\r\n");
 830                 wprintf("Cannot open %s: %s\r\n", what, strerror(errno));
 831                 end_burst();
 832         } else {
 833                 len = strlen (what);
 834                 content_type = GuessMimeByFilename(what, len);
 835
 836                 if (fstat(fd, &statbuf) == -1) {
 837                         lprintf(9, "output_static('%s')  -- FSTAT FAILED --\n", what);
 838                         hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 839                         hprintf("Content-Type: text/plain\r\n");
 840                         wprintf("Cannot fstat %s: %s\n", what, strerror(errno));
 841                         end_burst();
 842                         return;
 843                 }
 844
 845                 count = 0;
 846                 bytes = statbuf.st_size;
 847
 848                 if (StrBufReadBLOB(WC->WBuf, &fd, 1, bytes, &Err) < 0)
 849                 {
 850                         if (fd > 0) close(fd);
 851                         lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) --\n", what, strerror(errno));
 852                                 hprintf("HTTP/1.1 500 internal server error \r\n");
 853                                 hprintf("Content-Type: text/plain\r\n");
 854                                 end_burst();
 855                                 return;
 856                 }
 857
 858
 859                 close(fd);
 860                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
 861                 http_transmit_thing(content_type, 1);
 862         }
 863         if (yesbstr("force_close_session")) {
 864                 end_webcit_session();
 865         }
 866 }
 867
 868 /*
 869  * When the browser requests an image file from the Citadel server,
 870  * this function is called to transmit it.
 871  */
 872 void output_image()
 873 {
 874         struct wcsession *WCC = WC;
 875         char buf[SIZ];
 876         off_t bytes;
 877         const char *MimeType;
 878
 879         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 880         serv_getln(buf, sizeof buf);
 881         if (buf[0] == '2') {
 882                 bytes = extract_long(&buf[4], 0);
 883
 884                 /** Read it from the server */
 885
 886                 if (read_server_binary(WCC->WBuf, bytes) > 0) {
 887                         serv_puts("CLOS");
 888                         serv_getln(buf, sizeof buf);
 889
 890                         MimeType = GuessMimeType (ChrPtr(WCC->WBuf), StrLength(WCC->WBuf));
 891                         /** Write it to the browser */
 892                         if (!IsEmptyStr(MimeType))
 893                         {
 894                                 http_transmit_thing(MimeType, 0);
 895                                 return;
 896                         }
 897                 }
 898                 /* hm... unknown mimetype? fallback to blank gif */
 899         }
 900
 901
 902         /*
 903          * Instead of an ugly 404, send a 1x1 transparent GIF
 904          * when there's no such image on the server.
 905          */
 906         char blank_gif[SIZ];
 907         snprintf (blank_gif, SIZ, "%s%s", static_dirs[0], "/blank.gif");
 908         output_static(blank_gif);
 909 }
 910
 911 /*
 912  * Extract an embedded photo from a vCard for display on the client
 913  */
 914 void display_vcard_photo_img(void)
 915 {
 916         long msgnum = 0L;
 917         char *vcard;
 918         struct vCard *v;
 919         char *photosrc;
 920         const char *contentType;
 921         struct wcsession *WCC = WC;
 922
 923         msgnum = StrTol(WCC->UrlFragment1);
 924
 925         vcard = load_mimepart(msgnum,"1");
 926         v = vcard_load(vcard);
 927
 928         photosrc = vcard_get_prop(v, "PHOTO", 1,0,0);
 929         FlushStrBuf(WCC->WBuf);
 930         StrBufAppendBufPlain(WCC->WBuf, photosrc, -1, 0);
 931         if (StrBufDecodeBase64(WCC->WBuf) <= 0) {
 932                 FlushStrBuf(WCC->WBuf);
 933
 934                 hprintf("HTTP/1.1 500 %s\n","Unable to get photo");
 935                 output_headers(0, 0, 0, 0, 0, 0);
 936                 hprintf("Content-Type: text/plain\r\n");
 937                 wprintf(_("Could Not decode vcard photo\n"));
 938                 end_burst();
 939                 return;
 940         }
 941         contentType = GuessMimeType(ChrPtr(WCC->WBuf), StrLength(WCC->WBuf));
 942         http_transmit_thing(contentType, 0);
 943         free(v);
 944         free(photosrc);
 945 }
 946
 947 /*
 948  * Generic function to output an arbitrary MIME part from an arbitrary
 949  * message number on the server.
 950  *
 951  * msgnum               Number of the item on the citadel server
 952  * partnum              The MIME part to be output
 953  * force_download       Nonzero to force set the Content-Type: header to "application/octet-stream"
 954  */
 955 void mimepart(const char *msgnum, const char *partnum, int force_download)
 956 {
 957         char buf[256];
 958         off_t bytes;
 959         char content_type[256];
 960
 961         serv_printf("OPNA %s|%s", msgnum, partnum);
 962         serv_getln(buf, sizeof buf);
 963         if (buf[0] == '2') {
 964                 bytes = extract_long(&buf[4], 0);
 965                 if (force_download) {
 966                         strcpy(content_type, "application/octet-stream");
 967                 }
 968                 else {
 969                         extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
 970                 }
 971                 output_headers(0, 0, 0, 0, 0, 0);
 972
 973                 read_server_binary(WC->WBuf, bytes);
 974                 serv_puts("CLOS");
 975                 serv_getln(buf, sizeof buf);
 976                 http_transmit_thing(content_type, 0);
 977         } else {
 978                 hprintf("HTTP/1.1 404 %s\n", &buf[4]);
 979                 output_headers(0, 0, 0, 0, 0, 0);
 980                 hprintf("Content-Type: text/plain\r\n");
 981                 wprintf(_("An error occurred while retrieving this part: %s\n"), &buf[4]);
 982                 end_burst();
 983         }
 984 }
 985
 986
 987 /*
 988  * Read any MIME part of a message, from the server, into memory.
 989  */
 990 char *load_mimepart(long msgnum, char *partnum)
 991 {
 992         char buf[SIZ];
 993         off_t bytes;
 994         char content_type[SIZ];
 995         char *content;
 996
 997         serv_printf("DLAT %ld|%s", msgnum, partnum);
 998         serv_getln(buf, sizeof buf);
 999         if (buf[0] == '6') {
1000                 bytes = extract_long(&buf[4], 0);
1001                 extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
1002
1003                 content = malloc(bytes + 2);
1004                 serv_read(content, bytes);
1005
1006                 content[bytes] = 0;     /* null terminate for good measure */
1007                 return(content);
1008         }
1009         else {
1010                 return(NULL);
1011         }
1012 }
1013
1014
1015 /*
1016  * Convenience functions to display a page containing only a string
1017  *
1018  * titlebarcolor        color of the titlebar of the frame
1019  * titlebarmsg          text to display in the title bar
1020  * messagetext          body of the box
1021  */
1022 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
1023 {
1024         hprintf("HTTP/1.1 200 OK\n");
1025         output_headers(1, 1, 2, 0, 0, 0);
1026         wprintf("<div id=\"banner\">\n");
1027         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
1028         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
1029         wprintf("</td></tr></table>\n");
1030         wprintf("</div>\n<div id=\"content\">\n");
1031         escputs(messagetext);
1032
1033         wprintf("<hr />\n");
1034         wDumpContent(1);
1035 }
1036
1037
1038 /*
1039  * Display a blank page.
1040  */
1041 void blank_page(void) {
1042         output_headers(1, 1, 0, 0, 0, 0);
1043         wDumpContent(2);
1044 }
1045
1046
1047 /*
1048  * A template has been requested
1049  */
1050 void url_do_template(void) {
1051         const StrBuf *Tmpl = sbstr("template");
1052         begin_burst();
1053         output_headers(1, 0, 0, 0, 1, 0);
1054         DoTemplate(ChrPtr(Tmpl), StrLength(Tmpl), NULL, NULL);
1055         end_burst();
1056 }
1057
1058
1059
1060 /*
1061  * Offer to make any page the user's "start page."
1062  */
1063 void offer_start_page(void) {
1064         wprintf("<a href=\"change_start_page?startpage=");
1065         urlescputs(WC->this_page);
1066         wprintf("\">");
1067         wprintf(_("Make this my start page"));
1068         wprintf("</a>");
1069 #ifdef TECH_PREVIEW
1070         wprintf("<br/><a href=\"rss?room=");
1071         urlescputs(WC->wc_roomname);
1072         wprintf("\" title=\"RSS 2.0 feed for ");
1073         escputs(WC->wc_roomname);
1074         wprintf("\"><img alt=\"RSS\" border=\"0\" src=\"static/xml_button.gif\"/></a>\n");
1075 #endif
1076 }
1077
1078
1079 /*
1080  * Change the user's start page
1081  */
1082 void change_start_page(void) {
1083
1084         if (bstr("startpage") == NULL) {
1085                 safestrncpy(WC->ImportantMessage,
1086                         _("You no longer have a start page selected."),
1087                         sizeof WC->ImportantMessage);
1088                 display_main_menu();
1089                 return;
1090         }
1091
1092         set_preference("startpage", NewStrBufPlain(bstr("startpage"), -1), 1);
1093
1094         output_headers(1, 1, 0, 0, 0, 0);
1095         do_template("newstartpage", NULL);
1096         wDumpContent(1);
1097 }
1098
1099
1100
1101 /*
1102  * convenience function to indicate success
1103  */
1104 void display_success(char *successmessage)
1105 {
1106         convenience_page("007700", "OK", successmessage);
1107 }
1108
1109
1110 /*
1111  * Authorization required page
1112  * This is probably temporary and should be revisited
1113  */
1114 void authorization_required(const char *message)
1115 {
1116         hprintf("HTTP/1.1 401 Authorization Required\r\n");
1117         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", serv_info.serv_humannode);
1118         hprintf("Content-Type: text/html\r\n");
1119         wprintf("<h1>");
1120         wprintf(_("Authorization Required"));
1121         wprintf("</h1>\r\n");
1122         wprintf(_("The resource you requested requires a valid username and password. "
1123                 "You could not be logged in: %s\n"), message);
1124         wDumpContent(0);
1125
1126 }
1127
1128 /*
1129  * This function is called by the MIME parser to handle data uploaded by
1130  * the browser.  Form data, uploaded files, and the data from HTTP PUT
1131  * operations (such as those found in GroupDAV) all arrive this way.
1132  *
1133  * name         Name of the item being uploaded
1134  * filename     Filename of the item being uploaded
1135  * partnum      MIME part identifier (not needed)
1136  * disp         MIME content disposition (not needed)
1137  * content      The actual data
1138  * cbtype       MIME content-type
1139  * cbcharset    Character set
1140  * length       Content length
1141  * encoding     MIME encoding type (not needed)
1142  * userdata     Not used here
1143  */
1144 void upload_handler(char *name, char *filename, char *partnum, char *disp,
1145                         void *content, char *cbtype, char *cbcharset,
1146                         size_t length, char *encoding, void *userdata)
1147 {
1148         urlcontent *u;
1149 #ifdef DEBUG_URLSTRINGS
1150         lprintf(9, "upload_handler() name=%s, type=%s, len=%d\n", name, cbtype, length);
1151 #endif
1152         if (WC->urlstrings == NULL)
1153                 WC->urlstrings = NewHash(1, NULL);
1154
1155         /* Form fields */
1156         if ( (length > 0) && (IsEmptyStr(cbtype)) ) {
1157                 u = (urlcontent *) malloc(sizeof(urlcontent));
1158
1159                 safestrncpy(u->url_key, name, sizeof(u->url_key));
1160                 u->url_data = NewStrBufPlain(content, length);
1161
1162                 Put(WC->urlstrings, u->url_key, strlen(u->url_key), u, free_url);
1163 #ifdef DEBUG_URLSTRINGS
1164                 lprintf(9, "Key: <%s> len: [%ld] Data: <%s>\n", u->url_key, u->url_data_size, u->url_data);
1165 #endif
1166         }
1167
1168         /** Uploaded files */
1169         if ( (length > 0) && (!IsEmptyStr(cbtype)) ) {
1170                 WC->upload = malloc(length);
1171                 if (WC->upload != NULL) {
1172                         WC->upload_length = length;
1173                         safestrncpy(WC->upload_filename, filename,
1174                                         sizeof(WC->upload_filename));
1175                         safestrncpy(WC->upload_content_type, cbtype,
1176                                         sizeof(WC->upload_content_type));
1177                         memcpy(WC->upload, content, length);
1178                 }
1179                 else {
1180                         lprintf(3, "malloc() failed: %s\n", strerror(errno));
1181                 }
1182         }
1183
1184 }
1185
1186 /*
1187  * Convenience functions to wrap around asynchronous ajax responses
1188  */
1189 void begin_ajax_response(void) {
1190         struct wcsession *WCC = WC;
1191
1192         FlushStrBuf(WCC->HBuf);
1193         output_headers(0, 0, 0, 0, 0, 0);
1194
1195         hprintf("Content-type: text/html; charset=UTF-8\r\n"
1196                 "Server: %s\r\n"
1197                 "Connection: close\r\n"
1198                 ,
1199                 PACKAGE_STRING);
1200         begin_burst();
1201 }
1202
1203 /*
1204  * print ajax response footer
1205  */
1206 void end_ajax_response(void) {
1207         ///hprintf("\r\n");///// todo: is this right?
1208         wDumpContent(0);
1209 }
1210
1211 /*
1212  * Wraps a Citadel server command in an AJAX transaction.
1213  */
1214 void ajax_servcmd(void)
1215 {
1216         char buf[1024];
1217         char gcontent[1024];
1218         char *junk;
1219         size_t len;
1220
1221         begin_ajax_response();
1222
1223         serv_printf("%s", bstr("g_cmd"));
1224         serv_getln(buf, sizeof buf);
1225         wprintf("%s\n", buf);
1226
1227         if (buf[0] == '8') {
1228                 serv_printf("\n\n000");
1229         }
1230         if ((buf[0] == '1') || (buf[0] == '8')) {
1231                 while (serv_getln(gcontent, sizeof gcontent), strcmp(gcontent, "000")) {
1232                         wprintf("%s\n", gcontent);
1233                 }
1234                 wprintf("000");
1235         }
1236         if (buf[0] == '4') {
1237                 text_to_server(bstr("g_input"));
1238                 serv_puts("000");
1239         }
1240         if (buf[0] == '6') {
1241                 len = atol(&buf[4]);
1242                 junk = malloc(len);
1243                 serv_read(junk, len);
1244                 free(junk);
1245         }
1246         if (buf[0] == '7') {
1247                 len = atol(&buf[4]);
1248                 junk = malloc(len);
1249                 memset(junk, 0, len);
1250                 serv_write(junk, len);
1251                 free(junk);
1252         }
1253
1254         end_ajax_response();
1255
1256         /*
1257          * This is kind of an ugly hack, but this is the only place it can go.
1258          * If the command was GEXP, then the instant messenger window must be
1259          * running, so reset the "last_pager_check" watchdog timer so
1260          * that page_popup() doesn't try to open it a second time.
1261          */
1262         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
1263                 WC->last_pager_check = time(NULL);
1264         }
1265 }
1266
1267
1268 /*
1269  * Helper function for the asynchronous check to see if we need
1270  * to open the instant messenger window.
1271  */
1272 void seconds_since_last_gexp(void)
1273 {
1274         char buf[256];
1275
1276         if ( (time(NULL) - WC->last_pager_check) < 30) {
1277                 wprintf("NO\n");
1278         }
1279         else {
1280                 serv_puts("NOOP");
1281                 serv_getln(buf, sizeof buf);
1282                 if (buf[3] == '*') {
1283                         wprintf("YES");
1284                 }
1285                 else {
1286                         wprintf("NO");
1287                 }
1288         }
1289 }
1290
1291 /**
1292  * \brief Detects a 'mobile' user agent
1293  */
1294 int is_mobile_ua(char *user_agent) {
1295       if (strstr(user_agent,"iPhone OS") != NULL) {
1296         return 1;
1297       } else if (strstr(user_agent,"Windows CE") != NULL) {
1298         return 1;
1299       } else if (strstr(user_agent,"SymbianOS") != NULL) {
1300         return 1;
1301       } else if (strstr(user_agent, "Opera Mobi") != NULL) {
1302         return 1;
1303       } else if (strstr(user_agent, "Firefox/2.0.0 Opera 9.51 Beta") != NULL) {
1304                  // For some reason a new install of Opera 9.51beta decided to spoof.
1305           return 1;
1306           }
1307       return 0;
1308 }
1309
1310
1311 /*
1312  * Entry point for WebCit transaction
1313  */
1314 void session_loop(struct httprequest *req)
1315 {
1316         char cmd[1024];
1317         char action[1024];
1318         char arg[8][128];
1319         size_t sizes[10];
1320         char *index[10];
1321         char buf[SIZ];
1322         char request_method[128];
1323         char pathname[1024];
1324         int a, b, nBackDots, nEmpty;
1325         int ContentLength = 0;
1326         char ContentType[512];
1327         char *content = NULL;
1328         char *content_end = NULL;
1329         struct httprequest *hptr;
1330         char browser_host[256];
1331         char user_agent[256];
1332         int body_start = 0;
1333         int is_static = 0;
1334         int n_static = 0;
1335         int len = 0;
1336         /*
1337          * We stuff these with the values coming from the client cookies,
1338          * so we can use them to reconnect a timed out session if we have to.
1339          */
1340         char c_username[SIZ];
1341         char c_password[SIZ];
1342         char c_roomname[SIZ];
1343         char c_httpauth_string[SIZ];
1344         char c_httpauth_user[SIZ];
1345         char c_httpauth_pass[SIZ];
1346         char cookie[SIZ];
1347         struct wcsession *WCC;
1348
1349         safestrncpy(c_username, "", sizeof c_username);
1350         safestrncpy(c_password, "", sizeof c_password);
1351         safestrncpy(c_roomname, "", sizeof c_roomname);
1352         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
1353         safestrncpy(c_httpauth_user, DEFAULT_HTTPAUTH_USER, sizeof c_httpauth_user);
1354         safestrncpy(c_httpauth_pass, DEFAULT_HTTPAUTH_PASS, sizeof c_httpauth_pass);
1355         strcpy(browser_host, "");
1356
1357         WCC= WC;
1358         if (WCC->WBuf == NULL)
1359                 WC->WBuf = NewStrBufPlain(NULL, 32768);
1360         FlushStrBuf(WCC->WBuf);
1361
1362         if (WCC->HBuf == NULL)
1363                 WCC->HBuf = NewStrBuf();
1364         FlushStrBuf(WCC->HBuf);
1365
1366         WCC->upload_length = 0;
1367         WCC->upload = NULL;
1368         WCC->is_mobile = 0;
1369
1370         hptr = req;
1371         if (hptr == NULL) return;
1372
1373         safestrncpy(cmd, hptr->line, sizeof cmd);
1374         hptr = hptr->next;
1375         extract_token(request_method, cmd, 0, ' ', sizeof request_method);
1376         extract_token(pathname, cmd, 1, ' ', sizeof pathname);
1377
1378         /** Figure out the action */
1379         index[0] = action;
1380         sizes[0] = sizeof action;
1381         for (a=1; a<9; a++)
1382         {
1383                 index[a] = arg[a-1];
1384                 sizes[a] = sizeof arg[a-1];
1385         }
1386 ////    index[9] = &foo; todo
1387         nBackDots = 0;
1388         nEmpty = 0;
1389         for ( a = 0; a < 9; ++a)
1390         {
1391                 extract_token(index[a], pathname, a + 1, '/', sizes[a]);
1392                 if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
1393                 if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
1394                 if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
1395                 if ((index[a][0] == '.') && (index[a][1] == '.'))
1396                         nBackDots++;
1397                 if (index[a][0] == '\0')
1398                         nEmpty++;
1399         }
1400
1401         while (hptr != NULL) {
1402                 safestrncpy(buf, hptr->line, sizeof buf);
1403                 /* lprintf(9, "HTTP HEADER: %s\n", buf); */
1404                 hptr = hptr->next;
1405
1406                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
1407                         safestrncpy(cookie, &buf[15], sizeof cookie);
1408                         cookie_to_stuff(cookie, NULL,
1409                                         c_username, sizeof c_username,
1410                                         c_password, sizeof c_password,
1411                                         c_roomname, sizeof c_roomname);
1412                 }
1413                 else if (!strncasecmp(buf, "Authorization: Basic ", 21)) {
1414                         CtdlDecodeBase64(c_httpauth_string, &buf[21], strlen(&buf[21]));
1415                         extract_token(c_httpauth_user, c_httpauth_string, 0, ':', sizeof c_httpauth_user);
1416                         extract_token(c_httpauth_pass, c_httpauth_string, 1, ':', sizeof c_httpauth_pass);
1417                 }
1418                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
1419                         ContentLength = atoi(&buf[16]);
1420                 }
1421                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
1422                         safestrncpy(ContentType, &buf[14], sizeof ContentType);
1423                 }
1424                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
1425                         safestrncpy(user_agent, &buf[12], sizeof user_agent);
1426                         #ifdef TECH_PREVIEW
1427                         if (is_mobile_ua(&buf[12])) {
1428                                 WCC->is_mobile = 1;
1429                         }
1430                         #endif
1431                 }
1432                 else if (!strncasecmp(buf, "X-Forwarded-Host: ", 18)) {
1433                         if (follow_xff) {
1434                                 safestrncpy(WCC->http_host, &buf[18], sizeof WCC->http_host);
1435                         }
1436                 }
1437                 else if (!strncasecmp(buf, "Host: ", 6)) {
1438                         if (IsEmptyStr(WCC->http_host)) {
1439                                 safestrncpy(WCC->http_host, &buf[6], sizeof WCC->http_host);
1440                         }
1441                 }
1442                 else if (!strncasecmp(buf, "X-Forwarded-For: ", 17)) {
1443                         safestrncpy(browser_host, &buf[17], sizeof browser_host);
1444                         while (num_tokens(browser_host, ',') > 1) {
1445                                 remove_token(browser_host, 0, ',');
1446                         }
1447                         striplt(browser_host);
1448                 }
1449         }
1450
1451         if (ContentLength > 0) {
1452                 int BuffSize;
1453
1454                 BuffSize = ContentLength + SIZ;
1455                 content = malloc(BuffSize);
1456                 memset(content, 0, BuffSize);
1457                 snprintf(content,  BuffSize, "Content-type: %s\n"
1458                          "Content-length: %d\n\n",
1459                          ContentType, ContentLength);
1460 /*
1461                 hprintf("Content-type: %s\n"
1462                         "Content-length: %d\n\n",
1463                         ContentType, ContentLength);
1464 */
1465                 body_start = strlen(content);
1466
1467                 /** Read the entire input data at once. */
1468                 client_read(&WCC->http_sock, &content[body_start], ContentLength);
1469
1470                 if (!strncasecmp(ContentType, "application/x-www-form-urlencoded", 33)) {
1471                         StrBuf *Content;
1472
1473                         Content = _NewConstStrBuf(&content[body_start],ContentLength);
1474                         addurls(Content);
1475                         FreeStrBuf(&Content);
1476                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
1477                         content_end = content + ContentLength + body_start;
1478                         mime_parser(content, content_end, *upload_handler, NULL, NULL, NULL, 0);
1479                 }
1480         } else {
1481                 content = NULL;
1482         }
1483
1484         /* make a note of where we are in case the user wants to save it */
1485         safestrncpy(WCC->this_page, cmd, sizeof(WCC->this_page));
1486         remove_token(WCC->this_page, 2, ' ');
1487         remove_token(WCC->this_page, 0, ' ');
1488
1489         /* If there are variables in the URL, we must grab them now */
1490         len = strlen(cmd);
1491         for (a = 0; a < len; ++a) {
1492                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
1493                         StrBuf *Params;
1494                         for (b = a; b < len; ++b) {
1495                                 if (isspace(cmd[b])){
1496                                         cmd[b] = 0;
1497                                         len = b - 1;
1498                                 }
1499                         }
1500                         //cmd[len - a] = '\0';
1501                         Params = _NewConstStrBuf(&cmd[a + 1], len - a);
1502                         addurls(Params);
1503                         FreeStrBuf(&Params);
1504                         cmd[a] = 0;
1505                         len = a - 1;
1506                 }
1507         }
1508
1509         /* If it's a "force 404" situation then display the error and bail. */
1510         if (!strcmp(action, "404")) {
1511                 hprintf("HTTP/1.1 404 Not found\r\n");
1512                 hprintf("Content-Type: text/plain\r\n");
1513                 wprintf("Not found\r\n");
1514                 end_burst();
1515                 goto SKIP_ALL_THIS_CRAP;
1516         }
1517
1518         /* Static content can be sent without connecting to Citadel. */
1519         is_static = 0;
1520         for (a=0; a<ndirs; ++a) {
1521                 if (!strcasecmp(action, (char*)static_content_dirs[a])) { /* map web to disk location */
1522                         is_static = 1;
1523                         n_static = a;
1524                 }
1525         }
1526         if (is_static) {
1527                 if (nBackDots < 2)
1528                 {
1529                         snprintf(buf, sizeof buf, "%s/%s/%s/%s/%s/%s/%s/%s",
1530                                  static_dirs[n_static],
1531                                  index[1], index[2], index[3], index[4], index[5], index[6], index[7]);
1532                         for (a=0; a<8; ++a) {
1533                                 if (buf[strlen(buf)-1] == '/') {
1534                                         buf[strlen(buf)-1] = 0;
1535                                 }
1536                         }
1537                         for (a = 0; a < strlen(buf); ++a) {
1538                                 if (isspace(buf[a])) {
1539                                         buf[a] = 0;
1540                                 }
1541                         }
1542                         output_static(buf);
1543                 }
1544                 else
1545                 {
1546                         lprintf(9, "Suspicious request. Ignoring.");
1547                         hprintf("HTTP/1.1 404 Security check failed\r\n");
1548                         hprintf("Content-Type: text/plain\r\n");
1549                         wprintf("You have sent a malformed or invalid request.\r\n");
1550                         end_burst();
1551                 }
1552                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
1553         }
1554
1555         /* If the client sent a nonce that is incorrect, kill the request. */
1556         if (strlen(bstr("nonce")) > 0) {
1557                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
1558                         bstr("nonce"), WCC->nonce);
1559                 if (ibstr("nonce") != WCC->nonce) {
1560                         lprintf(9, "Ignoring request with mismatched nonce.\n");
1561                         hprintf("HTTP/1.1 404 Security check failed\r\n");
1562                         hprintf("Content-Type: text/plain\r\n");
1563                         wprintf("Security check failed.\r\n");
1564                         end_burst();
1565                         goto SKIP_ALL_THIS_CRAP;
1566                 }
1567         }
1568
1569         /*
1570          * If we're not connected to a Citadel server, try to hook up the
1571          * connection now.
1572          */
1573         if (!WCC->connected) {
1574                 if (!strcasecmp(ctdlhost, "uds")) {
1575                         /* unix domain socket */
1576                         snprintf(buf, SIZ, "%s/citadel.socket", ctdlport);
1577                         WCC->serv_sock = uds_connectsock(buf);
1578                 }
1579                 else {
1580                         /* tcp socket */
1581                         WCC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
1582                 }
1583
1584                 if (WCC->serv_sock < 0) {
1585                         do_logout();
1586                         goto SKIP_ALL_THIS_CRAP;
1587                 }
1588                 else {
1589                         WCC->connected = 1;
1590                         serv_getln(buf, sizeof buf);    /** get the server welcome message */
1591
1592                         /**
1593                          * From what host is our user connecting?  Go with
1594                          * the host at the other end of the HTTP socket,
1595                          * unless we are following X-Forwarded-For: headers
1596                          * and such a header has already turned up something.
1597                          */
1598                         if ( (!follow_xff) || (strlen(browser_host) == 0) ) {
1599                                 locate_host(browser_host, WCC->http_sock);
1600                         }
1601
1602                         get_serv_info(browser_host, user_agent);
1603                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
1604                                 wprintf(_("You are connected to a Citadel "
1605                                         "server running Citadel %d.%02d. \n"
1606                                         "In order to run this version of WebCit "
1607                                         "you must also have Citadel %d.%02d or"
1608                                         " newer.\n\n\n"),
1609                                                 serv_info.serv_rev_level / 100,
1610                                                 serv_info.serv_rev_level % 100,
1611                                                 MINIMUM_CIT_VERSION / 100,
1612                                                 MINIMUM_CIT_VERSION % 100
1613                                         );
1614                                 end_webcit_session();
1615                                 goto SKIP_ALL_THIS_CRAP;
1616                         }
1617                 }
1618         }
1619 ////////todo: restorte language in this case
1620         /*
1621          * Functions which can be performed without logging in
1622          */
1623         if (!strcasecmp(action, "listsub")) {
1624                 do_listsub();
1625                 goto SKIP_ALL_THIS_CRAP;
1626         }
1627         if (!strcasecmp(action, "freebusy")) {
1628                 do_freebusy(cmd);
1629                 goto SKIP_ALL_THIS_CRAP;
1630         }
1631
1632         /*
1633          * If we're not logged in, but we have HTTP Authentication data,
1634          * try logging in to Citadel using that.
1635          */
1636         if ((!WCC->logged_in)
1637            && (strlen(c_httpauth_user) > 0)
1638            && (strlen(c_httpauth_pass) > 0)) {
1639                 serv_printf("USER %s", c_httpauth_user);
1640                 serv_getln(buf, sizeof buf);
1641                 if (buf[0] == '3') {
1642                         serv_printf("PASS %s", c_httpauth_pass);
1643                         serv_getln(buf, sizeof buf);
1644                         if (buf[0] == '2') {
1645                                 become_logged_in(c_httpauth_user,
1646                                                 c_httpauth_pass, buf);
1647                                 safestrncpy(WCC->httpauth_user, c_httpauth_user, sizeof WCC->httpauth_user);
1648                                 safestrncpy(WCC->httpauth_pass, c_httpauth_pass, sizeof WCC->httpauth_pass);
1649                         } else {
1650                                 /* Should only display when password is wrong */
1651                                 authorization_required(&buf[4]);
1652                                 goto SKIP_ALL_THIS_CRAP;
1653                         }
1654                 }
1655         }
1656
1657         /* This needs to run early */
1658 #ifdef TECH_PREVIEW
1659         if (!strcasecmp(action, "rss")) {
1660                 display_rss(bstr("room"), request_method);
1661                 goto SKIP_ALL_THIS_CRAP;
1662         }
1663 #endif
1664
1665         /*
1666          * The GroupDAV stuff relies on HTTP authentication instead of
1667          * our session's authentication.
1668          */
1669         if (!strncasecmp(action, "groupdav", 8)) {
1670                 groupdav_main(req, ContentType, /* do GroupDAV methods */
1671                         ContentLength, content+body_start);
1672                 if (!WCC->logged_in) {
1673                         WCC->killthis = 1;      /* If not logged in, don't */
1674                 }                               /* keep the session active */
1675                 goto SKIP_ALL_THIS_CRAP;
1676         }
1677
1678
1679         /*
1680          * Automatically send requests with any method other than GET or
1681          * POST to the GroupDAV code as well.
1682          */
1683         if ((strcasecmp(request_method, "GET")) && (strcasecmp(request_method, "POST"))) {
1684                 groupdav_main(req, ContentType, /** do GroupDAV methods */
1685                         ContentLength, content+body_start);
1686                 if (!WCC->logged_in) {
1687                         WCC->killthis = 1;      /** If not logged in, don't */
1688                 }                               /** keep the session active */
1689                 goto SKIP_ALL_THIS_CRAP;
1690         }
1691
1692         /*
1693          * If we're not logged in, but we have username and password cookies
1694          * supplied by the browser, try using them to log in.
1695          */
1696         if ((!WCC->logged_in)
1697            && (!IsEmptyStr(c_username))
1698            && (!IsEmptyStr(c_password))) {
1699                 serv_printf("USER %s", c_username);
1700                 serv_getln(buf, sizeof buf);
1701                 if (buf[0] == '3') {
1702                         serv_printf("PASS %s", c_password);
1703                         serv_getln(buf, sizeof buf);
1704                         if (buf[0] == '2') {
1705                                 StrBuf *Lang;
1706                                 become_logged_in(c_username, c_password, buf);
1707                                 if (get_preference("language", &Lang)) {
1708                                         set_selected_language(ChrPtr(Lang));
1709                                         go_selected_language();         /* set locale */
1710                                 }
1711                         }
1712                 }
1713         }
1714         /*
1715          * If we don't have a current room, but a cookie specifying the
1716          * current room is supplied, make an effort to go there.
1717          */
1718         if ((IsEmptyStr(WCC->wc_roomname)) && (!IsEmptyStr(c_roomname))) {
1719                 serv_printf("GOTO %s", c_roomname);
1720                 serv_getln(buf, sizeof buf);
1721                 if (buf[0] == '2') {
1722                         safestrncpy(WCC->wc_roomname, c_roomname, sizeof WCC->wc_roomname);
1723                 }
1724         }
1725
1726         if (!strcasecmp(action, "image")) {
1727                 output_image();
1728         } else if (!strcasecmp(action, "display_mime_icon")) {
1729                 display_mime_icon();
1730         }
1731         else {
1732                 void *vHandler;
1733                 WebcitHandler *Handler;
1734
1735                 GetHash(HandlerHash, action, strlen(action) /* TODO*/, &vHandler),
1736                         Handler = (WebcitHandler*) vHandler;
1737                 if (Handler != NULL) {
1738                         if (!WCC->logged_in && ((Handler->Flags & ANONYMOUS) == 0)) {
1739                                 display_login(NULL);
1740                         }
1741                         else {
1742                                 if((Handler->Flags & NEED_URL)) {
1743                                         if (WCC->UrlFragment1 == NULL)
1744                                                 WCC->UrlFragment1 = NewStrBuf();
1745                                         if (WCC->UrlFragment2 == NULL)
1746                                                 WCC->UrlFragment2 = NewStrBuf();
1747                                         StrBufPrintf(WCC->UrlFragment1, "%s", index[1]);
1748                                         StrBufPrintf(WCC->UrlFragment2, "%s", index[2]);
1749                                 }
1750                                 if ((Handler->Flags & AJAX) != 0)
1751                                         begin_ajax_response();
1752                                 Handler->F();
1753                                 if ((Handler->Flags & AJAX) != 0)
1754                                         end_ajax_response();
1755                         }
1756                 }
1757         /* When all else fais, display the main menu. */
1758         else {
1759                 if (!WCC->logged_in)
1760                         display_login(NULL);
1761                 else
1762                         display_main_menu();
1763         }
1764 }
1765 SKIP_ALL_THIS_CRAP:
1766         fflush(stdout);
1767         if (content != NULL) {
1768                 free(content);
1769                 content = NULL;
1770         }
1771         free_urls();
1772         if (WCC->upload_length > 0) {
1773                 free(WCC->upload);
1774                 WCC->upload_length = 0;
1775         }
1776 }
1777
1778
1779 /*
1780  * Replacement for sleep() that uses select() in order to avoid SIGALRM
1781  */
1782 void sleeeeeeeeeep(int seconds)
1783 {
1784         struct timeval tv;
1785
1786         tv.tv_sec = seconds;
1787         tv.tv_usec = 0;
1788         select(0, NULL, NULL, NULL, &tv);
1789 }
1790
1791 void diagnostics(void)
1792 {
1793         output_headers(1, 1, 1, 0, 0, 0);
1794         wprintf("Session: %d<hr />\n", WC->wc_session);
1795         wprintf("Command: <br /><PRE>\n");
1796         StrEscPuts(WC->UrlFragment1);
1797         wprintf("<br />\n");
1798         StrEscPuts(WC->UrlFragment2);
1799         wprintf("</PRE><hr />\n");
1800         wprintf("Variables: <br /><PRE>\n");
1801         dump_vars();
1802         wprintf("</PRE><hr />\n");
1803         wDumpContent(1);
1804 }
1805
1806 void view_mimepart(void) {
1807         mimepart(ChrPtr(WC->UrlFragment1),
1808                  ChrPtr(WC->UrlFragment2),
1809                  0);
1810 }
1811
1812 void download_mimepart(void) {
1813         mimepart(ChrPtr(WC->UrlFragment1),
1814                  ChrPtr(WC->UrlFragment2),
1815                  1);
1816 }
1817
1818
1819 int ConditionalImportantMesage(WCTemplateToken *Tokens, void *Context)
1820 {
1821         struct wcsession *WCC = WC;
1822         if (WCC != NULL)
1823                 return (!IsEmptyStr(WCC->ImportantMessage));
1824         else
1825                 return 0;
1826 }
1827
1828 void tmplput_importantmessage(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context)
1829 {
1830         struct wcsession *WCC = WC;
1831
1832         if (WCC != NULL) {
1833                 StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
1834                         WCC->ImportantMessage[0] = '\0';
1835         }
1836 }
1837
1838 void tmplput_offer_start_page(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context)
1839 {
1840         offer_start_page();
1841 }
1842
1843 void
1844 InitModule_WEBCIT
1845 (void)
1846 {
1847         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS);
1848         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
1849         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX);
1850         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
1851         WebcitAddUrlHandler(HKEY("change_start_page"), change_start_page, 0);
1852         WebcitAddUrlHandler(HKEY("toggle_self_service"), toggle_self_service, 0);
1853         WebcitAddUrlHandler(HKEY("vcardphoto"), display_vcard_photo_img, NEED_URL);
1854         WebcitAddUrlHandler(HKEY("mimepart"), view_mimepart, NEED_URL);
1855         WebcitAddUrlHandler(HKEY("mimepart_download"), download_mimepart, NEED_URL);
1856         WebcitAddUrlHandler(HKEY("diagnostics"), diagnostics, NEED_URL);
1857         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage);
1858         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage);
1859         RegisterNamespace("OFFERSTARTPAGE", 0, 0, tmplput_offer_start_page);
1860 }