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 ParseURLParams(StrBuf *url)
  99 {
 100         const char *aptr, *bptr, *eptr, *up;
 101         int len, keylen;
 102         urlcontent *u;
 103         struct wcsession *WCC = WC;
 104
 105         if (WCC->urlstrings == NULL)
 106                 WCC->urlstrings = NewHash(1, NULL);
 107         eptr = ChrPtr(url) + StrLength(url);
 108         up = ChrPtr(url);
 109         while ((up < eptr) && (!IsEmptyStr(up))) {
 110                 aptr = up;
 111                 while ((aptr < eptr) && (*aptr != '\0') && (*aptr != '='))
 112                         aptr++;
 113                 if (*aptr != '=') {
 114                         return;
 115                 }
 116                 aptr++;
 117                 bptr = aptr;
 118                 while ((bptr < eptr) && (*bptr != '\0')
 119                       && (*bptr != '&') && (*bptr != '?') && (*bptr != ' ')) {
 120                         bptr++;
 121                 }
 122                 keylen = aptr - up - 1; /* -1 -> '=' */
 123                 if(keylen > sizeof(u->url_key)) {
 124                         lprintf(1, "URLkey to long! [%s]", up);
 125                         continue;
 126                 }
 127
 128                 u = (urlcontent *) malloc(sizeof(urlcontent));
 129                 memcpy(u->url_key, up, keylen);
 130                 u->url_key[keylen] = '\0';
 131                 if (keylen < 0) {
 132                         lprintf(1, "URLkey to long! [%s]", up);
 133                         free(u);
 134                         continue;
 135                 }
 136
 137                 Put(WCC->urlstrings, u->url_key, keylen, u, free_url);
 138                 len = bptr - aptr;
 139                 u->url_data = NewStrBufPlain(aptr, len);
 140                 StrBufUnescape(u->url_data, 1);
 141
 142                 up = bptr;
 143                 ++up;
 144 #ifdef DEBUG_URLSTRINGS
 145                 lprintf(9, "%s = [%ld]  %s\n",
 146                         u->url_key,
 147                         StrLength(u->url_data),
 148                         ChrPtr(u->url_data));
 149 #endif
 150         }
 151 }
 152
 153 /*
 154  * free urlstring memory
 155  */
 156 void free_urls(void)
 157 {
 158         DeleteHash(&WC->urlstrings);
 159 }
 160
 161 /*
 162  * Diagnostic function to display the contents of all variables
 163  */
 164
 165 void dump_vars(void)
 166 {
 167         struct wcsession *WCC = WC;
 168         urlcontent *u;
 169         void *U;
 170         long HKLen;
 171         const char *HKey;
 172         HashPos *Cursor;
 173
 174         Cursor = GetNewHashPos ();
 175         while (GetNextHashPos(WCC->urlstrings, Cursor, &HKLen, &HKey, &U)) {
 176                 u = (urlcontent*) U;
 177                 wprintf("%38s = %s\n", u->url_key, ChrPtr(u->url_data));
 178         }
 179 }
 180
 181 /*
 182  * Return the value of a variable supplied to the current web page (from the url or a form)
 183  */
 184
 185 const char *XBstr(const char *key, size_t keylen, size_t *len)
 186 {
 187         void *U;
 188
 189         if ((WC->urlstrings != NULL) &&
 190             GetHash(WC->urlstrings, key, keylen, &U)) {
 191                 *len = StrLength(((urlcontent *)U)->url_data);
 192                 return ChrPtr(((urlcontent *)U)->url_data);
 193         }
 194         else {
 195                 *len = 0;
 196                 return ("");
 197         }
 198 }
 199
 200 const char *XBSTR(const char *key, size_t *len)
 201 {
 202         void *U;
 203
 204         if ((WC->urlstrings != NULL) &&
 205             GetHash(WC->urlstrings, key, strlen (key), &U)){
 206                 *len = StrLength(((urlcontent *)U)->url_data);
 207                 return ChrPtr(((urlcontent *)U)->url_data);
 208         }
 209         else {
 210                 *len = 0;
 211                 return ("");
 212         }
 213 }
 214
 215
 216 const char *BSTR(const char *key)
 217 {
 218         void *U;
 219
 220         if ((WC->urlstrings != NULL) &&
 221             GetHash(WC->urlstrings, key, strlen (key), &U))
 222                 return ChrPtr(((urlcontent *)U)->url_data);
 223         else
 224                 return ("");
 225 }
 226
 227 const char *Bstr(const char *key, size_t keylen)
 228 {
 229         void *U;
 230
 231         if ((WC->urlstrings != NULL) &&
 232             GetHash(WC->urlstrings, key, keylen, &U))
 233                 return ChrPtr(((urlcontent *)U)->url_data);
 234         else
 235                 return ("");
 236 }
 237
 238 const StrBuf *SBSTR(const char *key)
 239 {
 240         void *U;
 241
 242         if ((WC->urlstrings != NULL) &&
 243             GetHash(WC->urlstrings, key, strlen (key), &U))
 244                 return ((urlcontent *)U)->url_data;
 245         else
 246                 return NULL;
 247 }
 248
 249 const StrBuf *SBstr(const char *key, size_t keylen)
 250 {
 251         void *U;
 252
 253         if ((WC->urlstrings != NULL) &&
 254             GetHash(WC->urlstrings, key, keylen, &U))
 255                 return ((urlcontent *)U)->url_data;
 256         else
 257                 return NULL;
 258 }
 259
 260 long LBstr(const char *key, size_t keylen)
 261 {
 262         void *U;
 263
 264         if ((WC->urlstrings != NULL) &&
 265             GetHash(WC->urlstrings, key, keylen, &U))
 266                 return StrTol(((urlcontent *)U)->url_data);
 267         else
 268                 return (0);
 269 }
 270
 271 long LBSTR(const char *key)
 272 {
 273         void *U;
 274
 275         if ((WC->urlstrings != NULL) &&
 276             GetHash(WC->urlstrings, key, strlen(key), &U))
 277                 return StrTol(((urlcontent *)U)->url_data);
 278         else
 279                 return (0);
 280 }
 281
 282 int IBstr(const char *key, size_t keylen)
 283 {
 284         void *U;
 285
 286         if ((WC->urlstrings != NULL) &&
 287             GetHash(WC->urlstrings, key, keylen, &U))
 288                 return StrTol(((urlcontent *)U)->url_data);
 289         else
 290                 return (0);
 291 }
 292
 293 int IBSTR(const char *key)
 294 {
 295         void *U;
 296
 297         if ((WC->urlstrings != NULL) &&
 298             GetHash(WC->urlstrings, key, strlen(key), &U))
 299                 return StrToi(((urlcontent *)U)->url_data);
 300         else
 301                 return (0);
 302 }
 303
 304 int HaveBstr(const char *key, size_t keylen)
 305 {
 306         void *U;
 307
 308         if ((WC->urlstrings != NULL) &&
 309             GetHash(WC->urlstrings, key, keylen, &U))
 310                 return (StrLength(((urlcontent *)U)->url_data) != 0);
 311         else
 312                 return (0);
 313 }
 314
 315 int HAVEBSTR(const char *key)
 316 {
 317         void *U;
 318
 319         if ((WC->urlstrings != NULL) &&
 320             GetHash(WC->urlstrings, key, strlen(key), &U))
 321                 return (StrLength(((urlcontent *)U)->url_data) != 0);
 322         else
 323                 return (0);
 324 }
 325
 326
 327 int YesBstr(const char *key, size_t keylen)
 328 {
 329         void *U;
 330
 331         if ((WC->urlstrings != NULL) &&
 332             GetHash(WC->urlstrings, key, keylen, &U))
 333                 return strcmp( ChrPtr(((urlcontent *)U)->url_data), "yes") == 0;
 334         else
 335                 return (0);
 336 }
 337
 338 int YESBSTR(const char *key)
 339 {
 340         void *U;
 341
 342         if ((WC->urlstrings != NULL) &&
 343             GetHash(WC->urlstrings, key, strlen(key), &U))
 344                 return strcmp( ChrPtr(((urlcontent *)U)->url_data), "yes") == 0;
 345         else
 346                 return (0);
 347 }
 348
 349 /*
 350  * web-printing funcion. uses our vsnprintf wrapper
 351  */
 352 void wprintf(const char *format,...)
 353 {
 354         struct wcsession *WCC = WC;
 355         va_list arg_ptr;
 356
 357         if (WCC->WBuf == NULL)
 358                 WCC->WBuf = NewStrBuf();
 359
 360         va_start(arg_ptr, format);
 361         StrBufVAppendPrintf(WCC->WBuf, format, arg_ptr);
 362         va_end(arg_ptr);
 363
 364 ///     if (StrLength(WCC-WBuf) > 2048)
 365                 ///client_write(wbuf, strlen(wbuf));
 366 }
 367
 368 /*
 369  * http-header-printing funcion. uses our vsnprintf wrapper
 370  */
 371 void hprintf(const char *format,...)
 372 {
 373         struct wcsession *WCC = WC;
 374         va_list arg_ptr;
 375
 376         va_start(arg_ptr, format);
 377         StrBufVAppendPrintf(WCC->HBuf, format, arg_ptr);
 378         va_end(arg_ptr);
 379
 380 ///     if (StrLength(WCC-WBuf) > 2048)
 381                 ///client_write(wbuf, strlen(wbuf));
 382 }
 383
 384
 385 void tmplput_trailing_javascript(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *vContext, int ContextType)
 386 {
 387         struct wcsession *WCC = WC;
 388         StrBufAppendBuf(WCC->WBuf, WCC->trailing_javascript, 0);
 389 }
 390
 391 /*
 392  * wrap up an HTTP session, closes tags, etc.
 393  *
 394  * print_standard_html_footer should be set to:
 395  * 0            - to transmit only,
 396  * nonzero      - to append the closing tags
 397  */
 398 void wDumpContent(int print_standard_html_footer)
 399 {
 400         if (print_standard_html_footer) {
 401                 wprintf("</div> <!-- end of 'content' div -->\n");
 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;
 615
 616         if ((strbuf == NULL) || IsEmptyStr(strbuf))
 617                 return;
 618         OutBuf = NewStrBuf();
 619         StrMsgEscAppend(OutBuf, NULL, strbuf);
 620         StrEscAppend(WC->WBuf, OutBuf, NULL, 0, 0);
 621         FreeStrBuf(&OutBuf);
 622 }
 623
 624 /*
 625  * print a string to the client after cleaning it with msgesc()
 626  */
 627 void msgescputs(char *strbuf) {
 628         if ((strbuf != NULL) && !IsEmptyStr(strbuf))
 629                 StrMsgEscAppend(WC->WBuf, NULL, strbuf);
 630 }
 631
 632
 633
 634
 635 /*
 636  * Output HTTP headers and leading HTML for a page
 637  */
 638 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 639                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 640
 641                         int do_room_banner,     /* 0=no, 1=yes,
 642                                                  * 2 = I'm going to embed my own, so don't open the
 643                                                  *     <div id="content"> either.
 644                                                  */
 645
 646                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 647                         int suppress_check,     /* 1 = suppress check for instant messages          */
 648                         int cache               /* 1 = allow browser to cache this page             */
 649 ) {
 650         char cookie[1024];
 651         char httpnow[128];
 652
 653         hprintf("HTTP/1.1 200 OK\n");
 654         http_datestring(httpnow, sizeof httpnow, time(NULL));
 655
 656         if (do_httpheaders) {
 657                 hprintf("Content-type: text/html; charset=utf-8\r\n"
 658                         "Server: %s / %s\n"
 659                         "Connection: close\r\n",
 660                         PACKAGE_STRING, serv_info.serv_software
 661                 );
 662         }
 663
 664         if (cache) {
 665                 char httpTomorow[128];
 666
 667                 http_datestring(httpTomorow, sizeof httpTomorow,
 668                                 time(NULL) + 60 * 60 * 24 * 2);
 669
 670                 hprintf("Pragma: public\r\n"
 671                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 672                         "Last-modified: %s\r\n"
 673                         "Expires: %s\r\n",
 674                         httpnow,
 675                         httpTomorow
 676                 );
 677         }
 678         else {
 679                 hprintf("Pragma: no-cache\r\n"
 680                         "Cache-Control: no-store\r\n"
 681                         "Expires: -1\r\n"
 682                 );
 683         }
 684
 685         stuff_to_cookie(cookie, 1024, WC->wc_session, WC->wc_username,
 686                         WC->wc_password, WC->wc_roomname);
 687
 688         if (unset_cookies) {
 689                 hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 690         } else {
 691                 hprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 692                 if (server_cookie != NULL) {
 693                         hprintf("%s\n", server_cookie);
 694                 }
 695         }
 696
 697         if (do_htmlhead) {
 698                 begin_burst();
 699                 do_template("head", NULL);
 700         }
 701
 702         /* ICONBAR */
 703         if (do_htmlhead) {
 704                 begin_burst();
 705
 706                 /* check for ImportantMessages (these display in a div overlaying the main screen) */
 707                 if (!IsEmptyStr(WC->ImportantMessage)) {
 708                         wprintf("<div id=\"important_message\">\n"
 709                                 "<span class=\"imsg\">");
 710                         escputs(WC->ImportantMessage);
 711                         wprintf("</span><br />\n"
 712                                 "</div>\n"
 713                                 "<script type=\"text/javascript\">\n"
 714                                 "        setTimeout('hide_imsg_popup()', 5000); \n"
 715                                 "</script>\n");
 716                         WC->ImportantMessage[0] = 0;
 717                 }
 718
 719                 if ( (WC->logged_in) && (!unset_cookies) ) {
 720                         wprintf("<div id=\"iconbar\">");
 721                         do_selected_iconbar();
 722                         /** check for instant messages (these display in a new window) */
 723                         page_popup();
 724                         wprintf("</div>");
 725                 }
 726
 727                 if (do_room_banner == 1) {
 728                         wprintf("<div id=\"banner\">\n");
 729                         embed_room_banner(NULL, navbar_default);
 730                         wprintf("</div>\n");
 731                 }
 732         }
 733
 734         if (do_room_banner == 1) {
 735                 wprintf("<div id=\"content\">\n");
 736         }
 737 }
 738
 739
 740 /*
 741  * Generic function to do an HTTP redirect.  Easy and fun.
 742  */
 743 void http_redirect(const char *whichpage) {
 744         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 745         hprintf("Location: %s\r\n", whichpage);
 746         hprintf("URI: %s\r\n", whichpage);
 747         hprintf("Content-type: text/html; charset=utf-8\r\n");
 748         wprintf("<html><body>");
 749         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 750         wprintf("</body></html>\n");
 751         end_burst();
 752 }
 753
 754
 755
 756 /*
 757  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 758  */
 759 void http_transmit_thing(const char *content_type,
 760                          int is_static) {
 761
 762 #ifndef TECH_PREVIEW
 763         lprintf(9, "http_transmit_thing(%s)%s\n",
 764                 content_type,
 765                 (is_static ? " (static)" : "")
 766         );
 767 #endif
 768         output_headers(0, 0, 0, 0, 0, is_static);
 769
 770         hprintf("Content-type: %s\r\n"
 771                 "Server: %s\r\n"
 772                 "Connection: close\r\n",
 773                 content_type,
 774                 PACKAGE_STRING);
 775
 776         end_burst();
 777 }
 778
 779 /*
 780  * print menu box like used in the floor view or admin interface.
 781  * This function takes pair of strings as va_args,
 782  * Title        Title string of the box
 783  * Class        CSS Class for the box
 784  * nLines       How many string pairs should we print? (URL, UrlText)
 785  * ...          Pairs of URL Strings and their Names
 786  */
 787 void print_menu_box(char* Title, char *Class, int nLines, ...)
 788 {
 789         va_list arg_list;
 790         long i;
 791
 792         svput("BOXTITLE", WCS_STRING, Title);
 793         do_template("beginbox", NULL);
 794
 795         wprintf("<ul class=\"%s\">", Class);
 796
 797         va_start(arg_list, nLines);
 798         for (i = 0; i < nLines; ++i)
 799         {
 800                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 801                 wprintf((char *) va_arg(arg_list, char *));
 802                 wprintf("</a></li>\n");
 803         }
 804         va_end (arg_list);
 805
 806         wprintf("</a></li>\n");
 807
 808         wprintf("</ul>");
 809
 810         do_template("endbox", NULL);
 811 }
 812
 813
 814 /*
 815  * dump out static pages from disk
 816  */
 817 void output_static(char *what)
 818 {
 819         int fd;
 820         struct stat statbuf;
 821         off_t bytes;
 822         off_t count = 0;
 823         const char *content_type;
 824         int len;
 825         const char *Err;
 826
 827         fd = open(what, O_RDONLY);
 828         if (fd <= 0) {
 829                 lprintf(9, "output_static('%s')  -- NOT FOUND --\n", what);
 830                 hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 831                 hprintf("Content-Type: text/plain\r\n");
 832                 wprintf("Cannot open %s: %s\r\n", what, strerror(errno));
 833                 end_burst();
 834         } else {
 835                 len = strlen (what);
 836                 content_type = GuessMimeByFilename(what, len);
 837
 838                 if (fstat(fd, &statbuf) == -1) {
 839                         lprintf(9, "output_static('%s')  -- FSTAT FAILED --\n", what);
 840                         hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 841                         hprintf("Content-Type: text/plain\r\n");
 842                         wprintf("Cannot fstat %s: %s\n", what, strerror(errno));
 843                         end_burst();
 844                         return;
 845                 }
 846
 847                 count = 0;
 848                 bytes = statbuf.st_size;
 849
 850                 if (StrBufReadBLOB(WC->WBuf, &fd, 1, bytes, &Err) < 0)
 851                 {
 852                         if (fd > 0) close(fd);
 853                         lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) --\n", what, strerror(errno));
 854                                 hprintf("HTTP/1.1 500 internal server error \r\n");
 855                                 hprintf("Content-Type: text/plain\r\n");
 856                                 end_burst();
 857                                 return;
 858                 }
 859
 860
 861                 close(fd);
 862 #ifndef TECH_PREVIEW
 863                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
 864 #endif
 865                 http_transmit_thing(content_type, 1);
 866         }
 867         if (yesbstr("force_close_session")) {
 868                 end_webcit_session();
 869         }
 870 }
 871
 872 /*
 873  * When the browser requests an image file from the Citadel server,
 874  * this function is called to transmit it.
 875  */
 876 void output_image()
 877 {
 878         struct wcsession *WCC = WC;
 879         char buf[SIZ];
 880         off_t bytes;
 881         const char *MimeType;
 882
 883         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 884         serv_getln(buf, sizeof buf);
 885         if (buf[0] == '2') {
 886                 bytes = extract_long(&buf[4], 0);
 887
 888                 /** Read it from the server */
 889
 890                 if (read_server_binary(WCC->WBuf, bytes) > 0) {
 891                         serv_puts("CLOS");
 892                         serv_getln(buf, sizeof buf);
 893
 894                         MimeType = GuessMimeType (ChrPtr(WCC->WBuf), StrLength(WCC->WBuf));
 895                         /** Write it to the browser */
 896                         if (!IsEmptyStr(MimeType))
 897                         {
 898                                 http_transmit_thing(MimeType, 0);
 899                                 return;
 900                         }
 901                 }
 902                 /* hm... unknown mimetype? fallback to blank gif */
 903         }
 904
 905
 906         /*
 907          * Instead of an ugly 404, send a 1x1 transparent GIF
 908          * when there's no such image on the server.
 909          */
 910         char blank_gif[SIZ];
 911         snprintf (blank_gif, SIZ, "%s%s", static_dirs[0], "/blank.gif");
 912         output_static(blank_gif);
 913 }
 914
 915 /*
 916  * Extract an embedded photo from a vCard for display on the client
 917  */
 918 void display_vcard_photo_img(void)
 919 {
 920         long msgnum = 0L;
 921         char *vcard;
 922         struct vCard *v;
 923         char *photosrc;
 924         const char *contentType;
 925         struct wcsession *WCC = WC;
 926
 927         msgnum = StrTol(WCC->UrlFragment1);
 928
 929         vcard = load_mimepart(msgnum,"1");
 930         v = vcard_load(vcard);
 931
 932         photosrc = vcard_get_prop(v, "PHOTO", 1,0,0);
 933         FlushStrBuf(WCC->WBuf);
 934         StrBufAppendBufPlain(WCC->WBuf, photosrc, -1, 0);
 935         if (StrBufDecodeBase64(WCC->WBuf) <= 0) {
 936                 FlushStrBuf(WCC->WBuf);
 937
 938                 hprintf("HTTP/1.1 500 %s\n","Unable to get photo");
 939                 output_headers(0, 0, 0, 0, 0, 0);
 940                 hprintf("Content-Type: text/plain\r\n");
 941                 wprintf(_("Could Not decode vcard photo\n"));
 942                 end_burst();
 943                 return;
 944         }
 945         contentType = GuessMimeType(ChrPtr(WCC->WBuf), StrLength(WCC->WBuf));
 946         http_transmit_thing(contentType, 0);
 947         free(v);
 948         free(photosrc);
 949 }
 950
 951 /*
 952  * Generic function to output an arbitrary MIME attachment from
 953  * message being composed
 954  *
 955  * partnum              The MIME part to be output
 956  * filename             Fake filename to give
 957  * force_download       Nonzero to force set the Content-Type: header to "application/octet-stream"
 958  */
 959 void postpart(StrBuf *partnum, StrBuf *filename, int force_download)
 960 {
 961         void *vPart;
 962         char content_type[256];
 963         wc_attachment *part;
 964
 965         if (GetHash(WC->attachments, SKEY(partnum), &vPart) &&
 966             (vPart != NULL)) {
 967                 part = (wc_attachment*) vPart;
 968                 if (force_download) {
 969                         strcpy(content_type, "application/octet-stream");
 970                 }
 971                 else {
 972                         strncpy(content_type, ChrPtr(part->content_type), sizeof content_type);
 973                 }
 974                 output_headers(0, 0, 0, 0, 0, 0);
 975                 StrBufAppendBufPlain(WC->WBuf, part->data, part->length, 0);
 976                 http_transmit_thing(content_type, 0);
 977         } else {
 978                 hprintf("HTTP/1.1 404 %s\n", ChrPtr(partnum));
 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/%s\n"),
 982                         ChrPtr(partnum), ChrPtr(filename));
 983                 end_burst();
 984         }
 985 }
 986
 987
 988 /*
 989  * Generic function to output an arbitrary MIME part from an arbitrary
 990  * message number on the server.
 991  *
 992  * msgnum               Number of the item on the citadel server
 993  * partnum              The MIME part to be output
 994  * force_download       Nonzero to force set the Content-Type: header to "application/octet-stream"
 995  */
 996 void mimepart(const char *msgnum, const char *partnum, int force_download)
 997 {
 998         char buf[256];
 999         off_t bytes;
1000         char content_type[256];
1001
1002         serv_printf("OPNA %s|%s", msgnum, partnum);
1003         serv_getln(buf, sizeof buf);
1004         if (buf[0] == '2') {
1005                 bytes = extract_long(&buf[4], 0);
1006                 if (force_download) {
1007                         strcpy(content_type, "application/octet-stream");
1008                 }
1009                 else {
1010                         extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
1011                 }
1012                 output_headers(0, 0, 0, 0, 0, 0);
1013
1014                 read_server_binary(WC->WBuf, bytes);
1015                 serv_puts("CLOS");
1016                 serv_getln(buf, sizeof buf);
1017                 http_transmit_thing(content_type, 0);
1018         } else {
1019                 hprintf("HTTP/1.1 404 %s\n", &buf[4]);
1020                 output_headers(0, 0, 0, 0, 0, 0);
1021                 hprintf("Content-Type: text/plain\r\n");
1022                 wprintf(_("An error occurred while retrieving this part: %s\n"), &buf[4]);
1023                 end_burst();
1024         }
1025 }
1026
1027
1028 /*
1029  * Read any MIME part of a message, from the server, into memory.
1030  */
1031 char *load_mimepart(long msgnum, char *partnum)
1032 {
1033         char buf[SIZ];
1034         off_t bytes;
1035         char content_type[SIZ];
1036         char *content;
1037
1038         serv_printf("DLAT %ld|%s", msgnum, partnum);
1039         serv_getln(buf, sizeof buf);
1040         if (buf[0] == '6') {
1041                 bytes = extract_long(&buf[4], 0);
1042                 extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
1043
1044                 content = malloc(bytes + 2);
1045                 serv_read(content, bytes);
1046
1047                 content[bytes] = 0;     /* null terminate for good measure */
1048                 return(content);
1049         }
1050         else {
1051                 return(NULL);
1052         }
1053 }
1054
1055 /*
1056  * Read any MIME part of a message, from the server, into memory.
1057  */
1058 void MimeLoadData(wc_mime_attachment *Mime)
1059 {
1060         char buf[SIZ];
1061         off_t bytes;
1062 //// TODO: is there a chance the contenttype is different  to the one we know?
1063         serv_printf("DLAT %ld|%s", Mime->msgnum, ChrPtr(Mime->PartNum));
1064         serv_getln(buf, sizeof buf);
1065         if (buf[0] == '6') {
1066                 bytes = extract_long(&buf[4], 0);
1067
1068                 if (Mime->Data == NULL)
1069                         Mime->Data = NewStrBufPlain(NULL, bytes);
1070                 StrBuf_ServGetBLOB(Mime->Data, bytes);
1071
1072         }
1073         else {
1074                 FlushStrBuf(Mime->Data);
1075                 /// TODO XImportant message
1076         }
1077 }
1078
1079
1080 /*
1081  * Convenience functions to display a page containing only a string
1082  *
1083  * titlebarcolor        color of the titlebar of the frame
1084  * titlebarmsg          text to display in the title bar
1085  * messagetext          body of the box
1086  */
1087 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
1088 {
1089         hprintf("HTTP/1.1 200 OK\n");
1090         output_headers(1, 1, 2, 0, 0, 0);
1091         wprintf("<div id=\"banner\">\n");
1092         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
1093         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
1094         wprintf("</td></tr></table>\n");
1095         wprintf("</div>\n<div id=\"content\">\n");
1096         escputs(messagetext);
1097
1098         wprintf("<hr />\n");
1099         wDumpContent(1);
1100 }
1101
1102
1103 /*
1104  * Display a blank page.
1105  */
1106 void blank_page(void) {
1107         output_headers(1, 1, 0, 0, 0, 0);
1108         wDumpContent(2);
1109 }
1110
1111
1112 /*
1113  * A template has been requested
1114  */
1115 void url_do_template(void) {
1116         const StrBuf *Tmpl = sbstr("template");
1117         begin_burst();
1118         output_headers(1, 0, 0, 0, 1, 0);
1119         DoTemplate(ChrPtr(Tmpl), StrLength(Tmpl), NULL, NULL, 0);
1120         end_burst();
1121 }
1122
1123
1124
1125 /*
1126  * Offer to make any page the user's "start page."
1127  */
1128 void offer_start_page(StrBuf *Target, int nArgs, WCTemplateToken *Token, void *Context, int ContextType) {
1129         wprintf("<a href=\"change_start_page?startpage=");
1130         urlescputs(WC->this_page);
1131         wprintf("\">");
1132         wprintf(_("Make this my start page"));
1133         wprintf("</a>");
1134 #ifdef TECH_PREVIEW
1135         wprintf("<br/><a href=\"rss?room=");
1136         urlescputs(WC->wc_roomname);
1137         wprintf("\" title=\"RSS 2.0 feed for ");
1138         escputs(WC->wc_roomname);
1139         wprintf("\"><img alt=\"RSS\" border=\"0\" src=\"static/xml_button.gif\"/></a>\n");
1140 #endif
1141 }
1142
1143
1144 /*
1145  * Change the user's start page
1146  */
1147 void change_start_page(void) {
1148
1149         if (bstr("startpage") == NULL) {
1150                 safestrncpy(WC->ImportantMessage,
1151                         _("You no longer have a start page selected."),
1152                         sizeof WC->ImportantMessage);
1153                 display_main_menu();
1154                 return;
1155         }
1156
1157         set_preference("startpage", NewStrBufPlain(bstr("startpage"), -1), 1);
1158
1159         output_headers(1, 1, 0, 0, 0, 0);
1160         do_template("newstartpage", NULL);
1161         wDumpContent(1);
1162 }
1163
1164
1165
1166 /*
1167  * convenience function to indicate success
1168  */
1169 void display_success(char *successmessage)
1170 {
1171         convenience_page("007700", "OK", successmessage);
1172 }
1173
1174
1175 /*
1176  * Authorization required page
1177  * This is probably temporary and should be revisited
1178  */
1179 void authorization_required(const char *message)
1180 {
1181         hprintf("HTTP/1.1 401 Authorization Required\r\n");
1182         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", serv_info.serv_humannode);
1183         hprintf("Content-Type: text/html\r\n");
1184         wprintf("<h1>");
1185         wprintf(_("Authorization Required"));
1186         wprintf("</h1>\r\n");
1187         wprintf(_("The resource you requested requires a valid username and password. "
1188                 "You could not be logged in: %s\n"), message);
1189         wDumpContent(0);
1190
1191 }
1192
1193 /*
1194  * This function is called by the MIME parser to handle data uploaded by
1195  * the browser.  Form data, uploaded files, and the data from HTTP PUT
1196  * operations (such as those found in GroupDAV) all arrive this way.
1197  *
1198  * name         Name of the item being uploaded
1199  * filename     Filename of the item being uploaded
1200  * partnum      MIME part identifier (not needed)
1201  * disp         MIME content disposition (not needed)
1202  * content      The actual data
1203  * cbtype       MIME content-type
1204  * cbcharset    Character set
1205  * length       Content length
1206  * encoding     MIME encoding type (not needed)
1207  * cbid         Content ID (not needed)
1208  * userdata     Not used here
1209  */
1210 void upload_handler(char *name, char *filename, char *partnum, char *disp,
1211                         void *content, char *cbtype, char *cbcharset,
1212                         size_t length, char *encoding, char *cbid, void *userdata)
1213 {
1214         urlcontent *u;
1215 #ifdef DEBUG_URLSTRINGS
1216         lprintf(9, "upload_handler() name=%s, type=%s, len=%d\n", name, cbtype, length);
1217 #endif
1218         if (WC->urlstrings == NULL)
1219                 WC->urlstrings = NewHash(1, NULL);
1220
1221         /* Form fields */
1222         if ( (length > 0) && (IsEmptyStr(cbtype)) ) {
1223                 u = (urlcontent *) malloc(sizeof(urlcontent));
1224
1225                 safestrncpy(u->url_key, name, sizeof(u->url_key));
1226                 u->url_data = NewStrBufPlain(content, length);
1227
1228                 Put(WC->urlstrings, u->url_key, strlen(u->url_key), u, free_url);
1229 #ifdef DEBUG_URLSTRINGS
1230                 lprintf(9, "Key: <%s> len: [%ld] Data: <%s>\n",
1231                         u->url_key,
1232                         StrLength(u->url_data),
1233                         ChrPtr(u->url_data));
1234 #endif
1235         }
1236
1237         /** Uploaded files */
1238         if ( (length > 0) && (!IsEmptyStr(cbtype)) ) {
1239                 WC->upload = malloc(length);
1240                 if (WC->upload != NULL) {
1241                         WC->upload_length = length;
1242                         safestrncpy(WC->upload_filename, filename,
1243                                         sizeof(WC->upload_filename));
1244                         safestrncpy(WC->upload_content_type, cbtype,
1245                                         sizeof(WC->upload_content_type));
1246                         memcpy(WC->upload, content, length);
1247                 }
1248                 else {
1249                         lprintf(3, "malloc() failed: %s\n", strerror(errno));
1250                 }
1251         }
1252
1253 }
1254
1255 /*
1256  * Convenience functions to wrap around asynchronous ajax responses
1257  */
1258 void begin_ajax_response(void) {
1259         struct wcsession *WCC = WC;
1260
1261         FlushStrBuf(WCC->HBuf);
1262         output_headers(0, 0, 0, 0, 0, 0);
1263
1264         hprintf("Content-type: text/html; charset=UTF-8\r\n"
1265                 "Server: %s\r\n"
1266                 "Connection: close\r\n"
1267                 ,
1268                 PACKAGE_STRING);
1269         begin_burst();
1270 }
1271
1272 /*
1273  * print ajax response footer
1274  */
1275 void end_ajax_response(void) {
1276         wDumpContent(0);
1277 }
1278
1279 /*
1280  * Wraps a Citadel server command in an AJAX transaction.
1281  */
1282 void ajax_servcmd(void)
1283 {
1284         char buf[1024];
1285         char gcontent[1024];
1286         char *junk;
1287         size_t len;
1288
1289         begin_ajax_response();
1290
1291         serv_printf("%s", bstr("g_cmd"));
1292         serv_getln(buf, sizeof buf);
1293         wprintf("%s\n", buf);
1294
1295         if (buf[0] == '8') {
1296                 serv_printf("\n\n000");
1297         }
1298         if ((buf[0] == '1') || (buf[0] == '8')) {
1299                 while (serv_getln(gcontent, sizeof gcontent), strcmp(gcontent, "000")) {
1300                         wprintf("%s\n", gcontent);
1301                 }
1302                 wprintf("000");
1303         }
1304         if (buf[0] == '4') {
1305                 text_to_server(bstr("g_input"));
1306                 serv_puts("000");
1307         }
1308         if (buf[0] == '6') {
1309                 len = atol(&buf[4]);
1310                 junk = malloc(len);
1311                 serv_read(junk, len);
1312                 free(junk);
1313         }
1314         if (buf[0] == '7') {
1315                 len = atol(&buf[4]);
1316                 junk = malloc(len);
1317                 memset(junk, 0, len);
1318                 serv_write(junk, len);
1319                 free(junk);
1320         }
1321
1322         end_ajax_response();
1323
1324         /*
1325          * This is kind of an ugly hack, but this is the only place it can go.
1326          * If the command was GEXP, then the instant messenger window must be
1327          * running, so reset the "last_pager_check" watchdog timer so
1328          * that page_popup() doesn't try to open it a second time.
1329          */
1330         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
1331                 WC->last_pager_check = time(NULL);
1332         }
1333 }
1334
1335
1336 /*
1337  * Helper function for the asynchronous check to see if we need
1338  * to open the instant messenger window.
1339  */
1340 void seconds_since_last_gexp(void)
1341 {
1342         char buf[256];
1343
1344         if ( (time(NULL) - WC->last_pager_check) < 30) {
1345                 wprintf("NO\n");
1346         }
1347         else {
1348                 memset(buf, 5, 0);
1349                 serv_puts("NOOP");
1350                 serv_getln(buf, sizeof buf);
1351                 if (buf[3] == '*') {
1352                         wprintf("YES");
1353                 }
1354                 else {
1355                         wprintf("NO");
1356                 }
1357         }
1358 }
1359
1360 /**
1361  * \brief Detects a 'mobile' user agent
1362  */
1363 int is_mobile_ua(char *user_agent) {
1364       if (strstr(user_agent,"iPhone OS") != NULL) {
1365         return 1;
1366       } else if (strstr(user_agent,"Windows CE") != NULL) {
1367         return 1;
1368       } else if (strstr(user_agent,"SymbianOS") != NULL) {
1369         return 1;
1370       } else if (strstr(user_agent, "Opera Mobi") != NULL) {
1371         return 1;
1372       } else if (strstr(user_agent, "Firefox/2.0.0 Opera 9.51 Beta") != NULL) {
1373                  // For some reason a new install of Opera 9.51beta decided to spoof.
1374           return 1;
1375           }
1376       return 0;
1377 }
1378
1379
1380 /*
1381  * Entry point for WebCit transaction
1382  */
1383 void session_loop(HashList *HTTPHeaders, StrBuf *ReqLine, StrBuf *request_method, StrBuf *ReadBuf)
1384 {
1385         const char *pch, *pchs, *pche;
1386         void *vLine;
1387         char action[1024];
1388         char arg[8][128];
1389         size_t sizes[10];
1390         char *index[10];
1391         char buf[SIZ];
1392         int a, nBackDots, nEmpty;
1393         int ContentLength = 0;
1394         StrBuf *ContentType = NULL;
1395         StrBuf *UrlLine = NULL;
1396         StrBuf *content = NULL;
1397         const char *content_end = NULL;
1398         char browser_host[256];
1399         char user_agent[256];
1400         int body_start = 0;
1401         int is_static = 0;
1402         int n_static = 0;
1403         int len = 0;
1404         /*
1405          * We stuff these with the values coming from the client cookies,
1406          * so we can use them to reconnect a timed out session if we have to.
1407          */
1408         char c_username[SIZ];
1409         char c_password[SIZ];
1410         char c_roomname[SIZ];
1411         char c_httpauth_string[SIZ];
1412         char c_httpauth_user[SIZ];
1413         char c_httpauth_pass[SIZ];
1414         struct wcsession *WCC;
1415
1416         safestrncpy(c_username, "", sizeof c_username);
1417         safestrncpy(c_password, "", sizeof c_password);
1418         safestrncpy(c_roomname, "", sizeof c_roomname);
1419         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
1420         safestrncpy(c_httpauth_user, DEFAULT_HTTPAUTH_USER, sizeof c_httpauth_user);
1421         safestrncpy(c_httpauth_pass, DEFAULT_HTTPAUTH_PASS, sizeof c_httpauth_pass);
1422         strcpy(browser_host, "");
1423
1424         WCC= WC;
1425         if (WCC->WBuf == NULL)
1426                 WC->WBuf = NewStrBufPlain(NULL, 32768);
1427         FlushStrBuf(WCC->WBuf);
1428
1429         if (WCC->HBuf == NULL)
1430                 WCC->HBuf = NewStrBuf();
1431         FlushStrBuf(WCC->HBuf);
1432
1433         WCC->upload_length = 0;
1434         WCC->upload = NULL;
1435         WCC->is_mobile = 0;
1436         WCC->trailing_javascript = NewStrBuf();
1437
1438         /** Figure out the action */
1439         index[0] = action;
1440         sizes[0] = sizeof action;
1441         for (a=1; a<9; a++)
1442         {
1443                 index[a] = arg[a-1];
1444                 sizes[a] = sizeof arg[a-1];
1445         }
1446 ////    index[9] = &foo; todo
1447         nBackDots = 0;
1448         nEmpty = 0;
1449         for ( a = 0; a < 9; ++a)
1450         {
1451                 extract_token(index[a], ChrPtr(ReqLine), a + 1, '/', sizes[a]);
1452                 if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
1453                 if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
1454                 if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
1455                 if ((index[a][0] == '.') && (index[a][1] == '.'))
1456                         nBackDots++;
1457                 if (index[a][0] == '\0')
1458                         nEmpty++;
1459         }
1460
1461
1462         if (GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
1463             (vLine != NULL)){
1464                 cookie_to_stuff((StrBuf *)vLine, NULL,
1465                                 c_username, sizeof c_username,
1466                                 c_password, sizeof c_password,
1467                                 c_roomname, sizeof c_roomname);
1468         }
1469         if (GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
1470             (vLine!=NULL)) {
1471                 CtdlDecodeBase64(c_httpauth_string, ChrPtr((StrBuf*)vLine), StrLength((StrBuf*)vLine));
1472                 extract_token(c_httpauth_user, c_httpauth_string, 0, ':', sizeof c_httpauth_user);
1473                 extract_token(c_httpauth_pass, c_httpauth_string, 1, ':', sizeof c_httpauth_pass);
1474         }
1475         if (GetHash(HTTPHeaders, HKEY("CONTENT-LENGTH"), &vLine) &&
1476             (vLine!=NULL)) {
1477                 ContentLength = StrToi((StrBuf*)vLine);
1478         }
1479         if (GetHash(HTTPHeaders, HKEY("CONTENT-TYPE"), &vLine) &&
1480             (vLine!=NULL)) {
1481                 ContentType = (StrBuf*)vLine;
1482         }
1483         if (GetHash(HTTPHeaders, HKEY("USER-AGENT"), &vLine) &&
1484             (vLine!=NULL)) {
1485                 safestrncpy(user_agent, ChrPtr((StrBuf*)vLine), sizeof user_agent);
1486 #ifdef TECH_PREVIEW
1487                 if ((WCC->is_mobile < 0) && is_mobile_ua(&buf[12])) {
1488                         WCC->is_mobile = 1;
1489                 }
1490                 else {
1491                         WCC->is_mobile = 0;
1492                 }
1493 #endif
1494         }
1495         if ((follow_xff) &&
1496             GetHash(HTTPHeaders, HKEY("X-FORWARDED-HOST"), &vLine) &&
1497             (vLine != NULL)) {
1498                 safestrncpy(WCC->http_host,
1499                             ChrPtr((StrBuf*)vLine),
1500                             sizeof WCC->http_host);
1501         }
1502         if (IsEmptyStr(WCC->http_host) &&
1503             GetHash(HTTPHeaders, HKEY("HOST"), &vLine) &&
1504             (vLine!=NULL)) {
1505                 safestrncpy(WCC->http_host,
1506                             ChrPtr((StrBuf*)vLine),
1507                             sizeof WCC->http_host);
1508
1509         }
1510         if (GetHash(HTTPHeaders, HKEY("X-FORWARDED-FOR"), &vLine) &&
1511             (vLine!=NULL)) {
1512                 safestrncpy(browser_host,
1513                             ChrPtr((StrBuf*) vLine),
1514                             sizeof browser_host);
1515                 while (num_tokens(browser_host, ',') > 1) {
1516                         remove_token(browser_host, 0, ',');
1517                 }
1518                 striplt(browser_host);
1519         }
1520
1521         if (ContentLength > 0) {
1522                 content = NewStrBuf();
1523                 StrBufPrintf(content, "Content-type: %s\n"
1524                          "Content-length: %d\n\n",
1525                          ChrPtr(ContentType), ContentLength);
1526 /*
1527                 hprintf("Content-type: %s\n"
1528                         "Content-length: %d\n\n",
1529                         ContentType, ContentLength);
1530 */
1531                 body_start = StrLength(content);
1532
1533                 /** Read the entire input data at once. */
1534                 client_read(&WCC->http_sock, content, ReadBuf, ContentLength + body_start);
1535
1536                 if (!strncasecmp(ChrPtr(ContentType), "application/x-www-form-urlencoded", 33)) {
1537                         StrBufCutLeft(content, body_start);
1538                         ParseURLParams(content);
1539                 } else if (!strncasecmp(ChrPtr(ContentType), "multipart", 9)) {
1540                         content_end = ChrPtr(content) + ContentLength + body_start;
1541                         mime_parser(ChrPtr(content), content_end, *upload_handler, NULL, NULL, NULL, 0);
1542                 }
1543         } else {
1544                 content = NULL;
1545         }
1546
1547         /* make a note of where we are in case the user wants to save it */
1548         safestrncpy(WCC->this_page, ChrPtr(ReqLine), sizeof(WCC->this_page));
1549         remove_token(WCC->this_page, 2, ' ');
1550         remove_token(WCC->this_page, 0, ' ');
1551
1552         /* If there are variables in the URL, we must grab them now */
1553         UrlLine = NewStrBufDup(ReqLine);
1554         len = StrLength(UrlLine);
1555         pch = pchs = ChrPtr(UrlLine);
1556         pche = pchs + len;
1557         while (pch < pche) {
1558                 if ((*pch == '?') || (*pch == '&')) {
1559                         StrBufCutLeft(UrlLine, pch - pchs + 1);
1560                         ParseURLParams(UrlLine);
1561                         break;
1562                 }
1563                 pch ++;
1564         }
1565         FreeStrBuf(&UrlLine);
1566
1567         /* If it's a "force 404" situation then display the error and bail. */
1568         if (!strcmp(action, "404")) {
1569                 hprintf("HTTP/1.1 404 Not found\r\n");
1570                 hprintf("Content-Type: text/plain\r\n");
1571                 wprintf("Not found\r\n");
1572                 end_burst();
1573                 goto SKIP_ALL_THIS_CRAP;
1574         }
1575
1576         /* Static content can be sent without connecting to Citadel. */
1577         is_static = 0;
1578         for (a=0; a<ndirs && ! is_static; ++a) {
1579                 if (!strcasecmp(action, (char*)static_content_dirs[a])) { /* map web to disk location */
1580                         is_static = 1;
1581                         n_static = a;
1582                 }
1583         }
1584         if (is_static) {
1585                 if (nBackDots < 2)
1586                 {
1587                         snprintf(buf, sizeof buf, "%s/%s/%s/%s/%s/%s/%s/%s",
1588                                  static_dirs[n_static],
1589                                  index[1], index[2], index[3], index[4], index[5], index[6], index[7]);
1590                         for (a=0; a<8; ++a) {
1591                                 if (buf[strlen(buf)-1] == '/') {
1592                                         buf[strlen(buf)-1] = 0;
1593                                 }
1594                         }
1595                         for (a = 0; a < strlen(buf); ++a) {
1596                                 if (isspace(buf[a])) {
1597                                         buf[a] = 0;
1598                                 }
1599                         }
1600                         output_static(buf);
1601                 }
1602                 else
1603                 {
1604                         lprintf(9, "Suspicious request. Ignoring.");
1605                         hprintf("HTTP/1.1 404 Security check failed\r\n");
1606                         hprintf("Content-Type: text/plain\r\n");
1607                         wprintf("You have sent a malformed or invalid request.\r\n");
1608                         end_burst();
1609                 }
1610                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
1611         }
1612
1613         /* If the client sent a nonce that is incorrect, kill the request. */
1614         if (strlen(bstr("nonce")) > 0) {
1615                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
1616                         bstr("nonce"), WCC->nonce);
1617                 if (ibstr("nonce") != WCC->nonce) {
1618                         lprintf(9, "Ignoring request with mismatched nonce.\n");
1619                         hprintf("HTTP/1.1 404 Security check failed\r\n");
1620                         hprintf("Content-Type: text/plain\r\n");
1621                         wprintf("Security check failed.\r\n");
1622                         end_burst();
1623                         goto SKIP_ALL_THIS_CRAP;
1624                 }
1625         }
1626
1627         /*
1628          * If we're not connected to a Citadel server, try to hook up the
1629          * connection now.
1630          */
1631         if (!WCC->connected) {
1632                 if (!strcasecmp(ctdlhost, "uds")) {
1633                         /* unix domain socket */
1634                         snprintf(buf, SIZ, "%s/citadel.socket", ctdlport);
1635                         WCC->serv_sock = uds_connectsock(buf);
1636                 }
1637                 else {
1638                         /* tcp socket */
1639                         WCC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
1640                 }
1641
1642                 if (WCC->serv_sock < 0) {
1643                         do_logout();
1644                         goto SKIP_ALL_THIS_CRAP;
1645                 }
1646                 else {
1647                         WCC->connected = 1;
1648                         serv_getln(buf, sizeof buf);    /** get the server welcome message */
1649
1650                         /**
1651                          * From what host is our user connecting?  Go with
1652                          * the host at the other end of the HTTP socket,
1653                          * unless we are following X-Forwarded-For: headers
1654                          * and such a header has already turned up something.
1655                          */
1656                         if ( (!follow_xff) || (strlen(browser_host) == 0) ) {
1657                                 locate_host(browser_host, WCC->http_sock);
1658                         }
1659
1660                         get_serv_info(browser_host, user_agent);
1661                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
1662                                 begin_burst();
1663                                 wprintf(_("You are connected to a Citadel "
1664                                         "server running Citadel %d.%02d. \n"
1665                                         "In order to run this version of WebCit "
1666                                         "you must also have Citadel %d.%02d or"
1667                                         " newer.\n\n\n"),
1668                                                 serv_info.serv_rev_level / 100,
1669                                                 serv_info.serv_rev_level % 100,
1670                                                 MINIMUM_CIT_VERSION / 100,
1671                                                 MINIMUM_CIT_VERSION % 100
1672                                         );
1673                                 end_burst();
1674                                 end_webcit_session();
1675                                 goto SKIP_ALL_THIS_CRAP;
1676                         }
1677                 }
1678         }
1679 ////////todo: restore language in this case
1680         /*
1681          * Functions which can be performed without logging in
1682          */
1683         if (!strcasecmp(action, "listsub")) {
1684                 do_listsub();
1685                 goto SKIP_ALL_THIS_CRAP;
1686         }
1687         if (!strcasecmp(action, "freebusy")) {
1688                 do_freebusy(ChrPtr(ReqLine));
1689                 goto SKIP_ALL_THIS_CRAP;
1690         }
1691
1692         /*
1693          * If we're not logged in, but we have HTTP Authentication data,
1694          * try logging in to Citadel using that.
1695          */
1696         if ((!WCC->logged_in)
1697            && (strlen(c_httpauth_user) > 0)
1698            && (strlen(c_httpauth_pass) > 0)) {
1699                 serv_printf("USER %s", c_httpauth_user);
1700                 serv_getln(buf, sizeof buf);
1701                 if (buf[0] == '3') {
1702                         serv_printf("PASS %s", c_httpauth_pass);
1703                         serv_getln(buf, sizeof buf);
1704                         if (buf[0] == '2') {
1705                                 become_logged_in(c_httpauth_user,
1706                                                 c_httpauth_pass, buf);
1707                                 safestrncpy(WCC->httpauth_user, c_httpauth_user, sizeof WCC->httpauth_user);
1708                                 safestrncpy(WCC->httpauth_pass, c_httpauth_pass, sizeof WCC->httpauth_pass);
1709                         } else {
1710                                 /* Should only display when password is wrong */
1711                                 authorization_required(&buf[4]);
1712                                 goto SKIP_ALL_THIS_CRAP;
1713                         }
1714                 }
1715         }
1716
1717         /* This needs to run early */
1718 #ifdef TECH_PREVIEW
1719         if (!strcasecmp(action, "rss")) {
1720                 display_rss(bstr("room"), request_method);
1721                 goto SKIP_ALL_THIS_CRAP;
1722         }
1723 #endif
1724
1725         /*
1726          * The GroupDAV stuff relies on HTTP authentication instead of
1727          * our session's authentication.
1728          */
1729         if (!strncasecmp(action, "groupdav", 8)) {
1730                 groupdav_main(HTTPHeaders,
1731                               ReqLine, request_method,
1732                               ContentType, /* do GroupDAV methods */
1733                               ContentLength, content, body_start);
1734                 if (!WCC->logged_in) {
1735                         WCC->killthis = 1;      /* If not logged in, don't */
1736                 }                               /* keep the session active */
1737                 goto SKIP_ALL_THIS_CRAP;
1738         }
1739
1740
1741         /*
1742          * Automatically send requests with any method other than GET or
1743          * POST to the GroupDAV code as well.
1744          */
1745         if ((strcasecmp(ChrPtr(request_method), "GET")) && (strcasecmp(ChrPtr(request_method), "POST"))) {
1746                 groupdav_main(HTTPHeaders, ReqLine,
1747                               request_method, ContentType, /** do GroupDAV methods */
1748                               ContentLength, content, body_start);
1749                 if (!WCC->logged_in) {
1750                         WCC->killthis = 1;      /** If not logged in, don't */
1751                 }                               /** keep the session active */
1752                 goto SKIP_ALL_THIS_CRAP;
1753         }
1754
1755         /*
1756          * If we're not logged in, but we have username and password cookies
1757          * supplied by the browser, try using them to log in.
1758          */
1759         if ((!WCC->logged_in)
1760            && (!IsEmptyStr(c_username))
1761            && (!IsEmptyStr(c_password))) {
1762                 serv_printf("USER %s", c_username);
1763                 serv_getln(buf, sizeof buf);
1764                 if (buf[0] == '3') {
1765                         serv_printf("PASS %s", c_password);
1766                         serv_getln(buf, sizeof buf);
1767                         if (buf[0] == '2') {
1768                                 StrBuf *Lang;
1769                                 become_logged_in(c_username, c_password, buf);
1770                                 if (get_preference("language", &Lang)) {
1771                                         set_selected_language(ChrPtr(Lang));
1772                                         go_selected_language();         /* set locale */
1773                                 }
1774                                 get_preference("default_header_charset", &WCC->DefaultCharset);
1775                         }
1776                 }
1777         }
1778         /*
1779          * If we don't have a current room, but a cookie specifying the
1780          * current room is supplied, make an effort to go there.
1781          */
1782         if ((IsEmptyStr(WCC->wc_roomname)) && (!IsEmptyStr(c_roomname))) {
1783                 serv_printf("GOTO %s", c_roomname);
1784                 serv_getln(buf, sizeof buf);
1785                 if (buf[0] == '2') {
1786                         safestrncpy(WCC->wc_roomname, c_roomname, sizeof WCC->wc_roomname);
1787                 }
1788         }
1789
1790         if (!strcasecmp(action, "image")) {
1791                 output_image();
1792         } else if (!strcasecmp(action, "display_mime_icon")) {
1793                 display_mime_icon();
1794         }
1795         else {
1796                 void *vHandler;
1797                 WebcitHandler *Handler;
1798
1799                 GetHash(HandlerHash, action, strlen(action) /* TODO*/, &vHandler),
1800                         Handler = (WebcitHandler*) vHandler;
1801                 if (Handler != NULL) {
1802                         if (!WCC->logged_in && ((Handler->Flags & ANONYMOUS) == 0)) {
1803                                 display_login(NULL);
1804                         }
1805                         else {
1806                                 if((Handler->Flags & NEED_URL)) {
1807                                         if (WCC->UrlFragment1 == NULL)
1808                                                 WCC->UrlFragment1 = NewStrBuf();
1809                                         if (WCC->UrlFragment2 == NULL)
1810                                                 WCC->UrlFragment2 = NewStrBuf();
1811                                         StrBufPrintf(WCC->UrlFragment1, "%s", index[1]);
1812                                         StrBufPrintf(WCC->UrlFragment2, "%s", index[2]);
1813                                 }
1814                                 if ((Handler->Flags & AJAX) != 0)
1815                                         begin_ajax_response();
1816                                 Handler->F();
1817                                 if ((Handler->Flags & AJAX) != 0)
1818                                         end_ajax_response();
1819                         }
1820                 }
1821         /* When all else fais, display the main menu. */
1822         else {
1823                 if (!WCC->logged_in)
1824                         display_login(NULL);
1825                 else
1826                         display_main_menu();
1827         }
1828 }
1829 SKIP_ALL_THIS_CRAP:
1830         fflush(stdout);
1831         if (content != NULL) {
1832                 FreeStrBuf(&content);
1833                 content = NULL;
1834         }
1835         free_urls();
1836         if (WCC->upload_length > 0) {
1837                 free(WCC->upload);
1838                 WCC->upload_length = 0;
1839         }
1840         FreeStrBuf(&WCC->trailing_javascript);
1841 }
1842
1843
1844 /*
1845  * Replacement for sleep() that uses select() in order to avoid SIGALRM
1846  */
1847 void sleeeeeeeeeep(int seconds)
1848 {
1849         struct timeval tv;
1850
1851         tv.tv_sec = seconds;
1852         tv.tv_usec = 0;
1853         select(0, NULL, NULL, NULL, &tv);
1854 }
1855
1856 void diagnostics(void)
1857 {
1858         output_headers(1, 1, 1, 0, 0, 0);
1859         wprintf("Session: %d<hr />\n", WC->wc_session);
1860         wprintf("Command: <br /><PRE>\n");
1861         StrEscPuts(WC->UrlFragment1);
1862         wprintf("<br />\n");
1863         StrEscPuts(WC->UrlFragment2);
1864         wprintf("</PRE><hr />\n");
1865         wprintf("Variables: <br /><PRE>\n");
1866         dump_vars();
1867         wprintf("</PRE><hr />\n");
1868         wDumpContent(1);
1869 }
1870
1871 void view_mimepart(void) {
1872         mimepart(ChrPtr(WC->UrlFragment1),
1873                  ChrPtr(WC->UrlFragment2),
1874                  0);
1875 }
1876
1877 void download_mimepart(void) {
1878         mimepart(ChrPtr(WC->UrlFragment1),
1879                  ChrPtr(WC->UrlFragment2),
1880                  1);
1881 }
1882
1883 void view_postpart(void) {
1884         postpart(WC->UrlFragment1,
1885                  WC->UrlFragment2,
1886                  0);
1887 }
1888
1889 void download_postpart(void) {
1890         postpart(WC->UrlFragment1,
1891                  WC->UrlFragment2,
1892                  1);
1893 }
1894
1895
1896 int ConditionalImportantMesage(WCTemplateToken *Tokens, void *Context, int ContextType)
1897 {
1898         struct wcsession *WCC = WC;
1899         if (WCC != NULL)
1900                 return (!IsEmptyStr(WCC->ImportantMessage));
1901         else
1902                 return 0;
1903 }
1904
1905 void tmplput_importantmessage(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
1906 {
1907         struct wcsession *WCC = WC;
1908
1909         if (WCC != NULL) {
1910                 StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
1911                         WCC->ImportantMessage[0] = '\0';
1912         }
1913 }
1914
1915 int ConditionalBstr(WCTemplateToken *Tokens, void *Context, int ContextType)
1916 {
1917         if(Tokens->nParameters == 3)
1918                 return HaveBstr(Tokens->Params[2]->Start,
1919                                 Tokens->Params[2]->len);
1920         else
1921                 return strcmp(Bstr(Tokens->Params[2]->Start,
1922                                    Tokens->Params[2]->len),
1923                               Tokens->Params[3]->Start) == 0;
1924 }
1925
1926 void tmplput_bstr(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
1927 {
1928         StrBufAppendBuf(Target,
1929                         SBstr(Tokens->Params[0]->Start,
1930                               Tokens->Params[0]->len), 0);
1931 }
1932
1933
1934 void tmplput_csslocal(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
1935 {
1936         extern StrBuf *csslocal;
1937         StrBufAppendBuf(Target,
1938                         csslocal, 0);
1939 }
1940
1941
1942
1943
1944
1945
1946 void
1947 InitModule_WEBCIT
1948 (void)
1949 {
1950         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS);
1951         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
1952         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX);
1953         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
1954         WebcitAddUrlHandler(HKEY("change_start_page"), change_start_page, 0);
1955         WebcitAddUrlHandler(HKEY("toggle_self_service"), toggle_self_service, 0);
1956         WebcitAddUrlHandler(HKEY("vcardphoto"), display_vcard_photo_img, NEED_URL);
1957         WebcitAddUrlHandler(HKEY("mimepart"), view_mimepart, NEED_URL);
1958         WebcitAddUrlHandler(HKEY("mimepart_download"), download_mimepart, NEED_URL);
1959         WebcitAddUrlHandler(HKEY("postpart"), view_postpart, NEED_URL);
1960         WebcitAddUrlHandler(HKEY("postpart_download"), download_postpart, NEED_URL);
1961         WebcitAddUrlHandler(HKEY("diagnostics"), diagnostics, NEED_URL);
1962
1963         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
1964         RegisterConditional(HKEY("COND:BSTR"), 1, ConditionalBstr, CTX_NONE);
1965         RegisterNamespace("BSTR", 1, 2, tmplput_bstr, CTX_NONE);
1966         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, CTX_NONE);
1967         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
1968         RegisterNamespace("OFFERSTARTPAGE", 0, 0, offer_start_page, CTX_NONE);
1969         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, CTX_NONE);
1970 }