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 put_trailing_javascript(void) {
 386         wprintf("%s", ChrPtr(WC->trailing_javascript));
 387 }
 388
 389 /*
 390  * wrap up an HTTP session, closes tags, etc.
 391  *
 392  * print_standard_html_footer should be set to:
 393  * 0            - to transmit only,
 394  * nonzero      - to append the closing tags
 395  */
 396 void wDumpContent(int print_standard_html_footer)
 397 {
 398         if (print_standard_html_footer) {
 399                 wprintf("</div> <!-- end of 'content' div -->\n");
 400                 svcallback("TRAILING_JAVASCRIPT", put_trailing_javascript);
 401                 do_template("trailing", NULL);
 402         }
 403
 404         /* If we've been saving it all up for one big output burst,
 405          * go ahead and do that now.
 406          */
 407         end_burst();
 408 }
 409
 410
 411
 412 /*
 413  * Copy a string, escaping characters which have meaning in HTML.
 414  *
 415  * target              target buffer
 416  * strbuf              source buffer
 417  * nbsp                        If nonzero, spaces are converted to non-breaking spaces.
 418  * nolinebreaks                if set, linebreaks are removed from the string.
 419  */
 420 long stresc(char *target, long tSize, char *strbuf, int nbsp, int nolinebreaks)
 421 {
 422         char *aptr, *bptr, *eptr;
 423
 424         *target = '\0';
 425         aptr = strbuf;
 426         bptr = target;
 427         eptr = target + tSize - 6; // our biggest unit to put in...
 428
 429
 430         while ((bptr < eptr) && !IsEmptyStr(aptr) ){
 431                 if (*aptr == '<') {
 432                         memcpy(bptr, "&lt;", 4);
 433                         bptr += 4;
 434                 }
 435                 else if (*aptr == '>') {
 436                         memcpy(bptr, "&gt;", 4);
 437                         bptr += 4;
 438                 }
 439                 else if (*aptr == '&') {
 440                         memcpy(bptr, "&amp;", 5);
 441                         bptr += 5;
 442                 }
 443                 else if (*aptr == '\"') {
 444                         memcpy(bptr, "&quot;", 6);
 445                         bptr += 6;
 446                 }
 447                 else if (*aptr == '\'') {
 448                         memcpy(bptr, "&#39;", 5);
 449                         bptr += 5;
 450                 }
 451                 else if (*aptr == LB) {
 452                         *bptr = '<';
 453                         bptr ++;
 454                 }
 455                 else if (*aptr == RB) {
 456                         *bptr = '>';
 457                         bptr ++;
 458                 }
 459                 else if (*aptr == QU) {
 460                         *bptr ='"';
 461                         bptr ++;
 462                 }
 463                 else if ((*aptr == 32) && (nbsp == 1)) {
 464                         memcpy(bptr, "&nbsp;", 6);
 465                         bptr += 6;
 466                 }
 467                 else if ((*aptr == '\n') && (nolinebreaks)) {
 468                         *bptr='\0';     /* nothing */
 469                 }
 470                 else if ((*aptr == '\r') && (nolinebreaks)) {
 471                         *bptr='\0';     /* nothing */
 472                 }
 473                 else{
 474                         *bptr = *aptr;
 475                         bptr++;
 476                 }
 477                 aptr ++;
 478         }
 479         *bptr = '\0';
 480         if ((bptr = eptr - 1 ) && !IsEmptyStr(aptr) )
 481                 return -1;
 482         return (bptr - target);
 483 }
 484
 485
 486 void escputs1(char *strbuf, int nbsp, int nolinebreaks)
 487 {
 488         StrEscAppend(WC->WBuf, NULL, strbuf, nbsp, nolinebreaks);
 489 }
 490
 491 void StrEscputs1(const StrBuf *strbuf, int nbsp, int nolinebreaks)
 492 {
 493         StrEscAppend(WC->WBuf, strbuf, NULL, nbsp, nolinebreaks);
 494 }
 495
 496 /*
 497  * static wrapper for ecsputs1
 498  */
 499 void escputs(char *strbuf)
 500 {
 501         escputs1(strbuf, 0, 0);
 502 }
 503
 504
 505 /*
 506  * static wrapper for ecsputs1
 507  */
 508 void StrEscPuts(const StrBuf *strbuf)
 509 {
 510         StrEscputs1(strbuf, 0, 0);
 511 }
 512
 513
 514 /*
 515  * urlescape buffer and print it to the client
 516  */
 517 void urlescputs(const char *strbuf)
 518 {
 519         StrBufUrlescAppend(WC->WBuf, NULL, strbuf);
 520 }
 521
 522 /*
 523  * urlescape buffer and print it to the client
 524  */
 525 void UrlescPutStrBuf(const StrBuf *strbuf)
 526 {
 527         StrBufUrlescAppend(WC->WBuf, strbuf, NULL);
 528 }
 529
 530 /**
 531  * urlescape buffer and print it as header
 532  */
 533 void hurlescputs(const char *strbuf)
 534 {
 535         StrBufUrlescAppend(WC->HBuf, NULL, strbuf);
 536 }
 537
 538
 539 /*
 540  * Copy a string, escaping characters for JavaScript strings.
 541  */
 542 void jsesc(char *target, size_t tlen, char *strbuf)
 543 {
 544         int len;
 545         char *tend;
 546         char *send;
 547         char *tptr;
 548         char *sptr;
 549
 550         target[0]='\0';
 551         len = strlen (strbuf);
 552         send = strbuf + len;
 553         tend = target + tlen;
 554         sptr = strbuf;
 555         tptr = target;
 556
 557         while (!IsEmptyStr(sptr) &&
 558                (sptr < send) &&
 559                (tptr < tend)) {
 560
 561                 if (*sptr == '<')
 562                         *tptr = '[';
 563                 else if (*sptr == '>')
 564                         *tptr = ']';
 565                 else if (*sptr == '\'') {
 566                         if (tend - tptr < 3)
 567                                 return;
 568                         *(tptr++) = '\\';
 569                         *tptr = '\'';
 570                 }
 571                 else if (*sptr == '"') {
 572                         if (tend - tptr < 8)
 573                                 return;
 574                         *(tptr++) = '&';
 575                         *(tptr++) = 'q';
 576                         *(tptr++) = 'u';
 577                         *(tptr++) = 'o';
 578                         *(tptr++) = 't';
 579                         *tptr = ';';
 580                 }
 581                 else if (*sptr == '&') {
 582                         if (tend - tptr < 7)
 583                                 return;
 584                         *(tptr++) = '&';
 585                         *(tptr++) = 'a';
 586                         *(tptr++) = 'm';
 587                         *(tptr++) = 'p';
 588                         *tptr = ';';
 589                 } else {
 590                         *tptr = *sptr;
 591                 }
 592                 tptr++; sptr++;
 593         }
 594         *tptr = '\0';
 595 }
 596
 597 /*
 598  * escape and print javascript
 599  */
 600 void jsescputs(char *strbuf)
 601 {
 602         char outbuf[SIZ];
 603
 604         jsesc(outbuf, SIZ, strbuf);
 605         wprintf("%s", outbuf);
 606 }
 607
 608 /*
 609  * print a string to the client after cleaning it with msgesc() and stresc()
 610  */
 611 void msgescputs1( char *strbuf)
 612 {
 613         StrBuf *OutBuf;
 614
 615         if ((strbuf == NULL) || IsEmptyStr(strbuf))
 616                 return;
 617         OutBuf = NewStrBuf();
 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         lprintf(9, "http_transmit_thing(%s)%s\n",
 767                 content_type,
 768                 (is_static ? " (static)" : "")
 769         );
 770         output_headers(0, 0, 0, 0, 0, is_static);
 771
 772         hprintf("Content-type: %s\r\n"
 773                 "Server: %s\r\n"
 774                 "Connection: close\r\n",
 775                 content_type,
 776                 PACKAGE_STRING);
 777
 778         end_burst();
 779 }
 780
 781 /*
 782  * print menu box like used in the floor view or admin interface.
 783  * This function takes pair of strings as va_args,
 784  * Title        Title string of the box
 785  * Class        CSS Class for the box
 786  * nLines       How many string pairs should we print? (URL, UrlText)
 787  * ...          Pairs of URL Strings and their Names
 788  */
 789 void print_menu_box(char* Title, char *Class, int nLines, ...)
 790 {
 791         va_list arg_list;
 792         long i;
 793
 794         svput("BOXTITLE", WCS_STRING, Title);
 795         do_template("beginbox", NULL);
 796
 797         wprintf("<ul class=\"%s\">", Class);
 798
 799         va_start(arg_list, nLines);
 800         for (i = 0; i < nLines; ++i)
 801         {
 802                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 803                 wprintf((char *) va_arg(arg_list, char *));
 804                 wprintf("</a></li>\n");
 805         }
 806         va_end (arg_list);
 807
 808         wprintf("</a></li>\n");
 809
 810         wprintf("</ul>");
 811
 812         do_template("endbox", NULL);
 813 }
 814
 815
 816 /*
 817  * dump out static pages from disk
 818  */
 819 void output_static(char *what)
 820 {
 821         int fd;
 822         struct stat statbuf;
 823         off_t bytes;
 824         off_t count = 0;
 825         const char *content_type;
 826         int len;
 827         const char *Err;
 828
 829         fd = open(what, O_RDONLY);
 830         if (fd <= 0) {
 831                 lprintf(9, "output_static('%s')  -- NOT FOUND --\n", what);
 832                 hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 833                 hprintf("Content-Type: text/plain\r\n");
 834                 wprintf("Cannot open %s: %s\r\n", what, strerror(errno));
 835                 end_burst();
 836         } else {
 837                 len = strlen (what);
 838                 content_type = GuessMimeByFilename(what, len);
 839
 840                 if (fstat(fd, &statbuf) == -1) {
 841                         lprintf(9, "output_static('%s')  -- FSTAT FAILED --\n", what);
 842                         hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 843                         hprintf("Content-Type: text/plain\r\n");
 844                         wprintf("Cannot fstat %s: %s\n", what, strerror(errno));
 845                         end_burst();
 846                         return;
 847                 }
 848
 849                 count = 0;
 850                 bytes = statbuf.st_size;
 851
 852                 if (StrBufReadBLOB(WC->WBuf, &fd, 1, bytes, &Err) < 0)
 853                 {
 854                         if (fd > 0) close(fd);
 855                         lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) --\n", what, strerror(errno));
 856                                 hprintf("HTTP/1.1 500 internal server error \r\n");
 857                                 hprintf("Content-Type: text/plain\r\n");
 858                                 end_burst();
 859                                 return;
 860                 }
 861
 862
 863                 close(fd);
 864                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
 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(const char *partnum, const char *filename, int force_download)
 960 {
 961         char content_type[256];
 962         int num = atoi(partnum);
 963         struct wc_attachment *part = WC->first_attachment;
 964
 965         while(num && part) {
 966                 num--;
 967                 part=part->next;
 968         }
 969
 970         if (part) {
 971                 if (force_download) {
 972                         strcpy(content_type, "application/octet-stream");
 973                 }
 974                 else {
 975                         strncpy(content_type, part->content_type, sizeof content_type);
 976                 }
 977                 output_headers(0, 0, 0, 0, 0, 0);
 978                 StrBufAppendBufPlain(WC->WBuf, part->data, part->length, 0);
 979                 http_transmit_thing(content_type, 0);
 980         } else {
 981                 hprintf("HTTP/1.1 404 %s\n",partnum);
 982                 output_headers(0, 0, 0, 0, 0, 0);
 983                 hprintf("Content-Type: text/plain\r\n");
 984                 wprintf(_("An error occurred while retrieving this part: %s/%s\n"), partnum, filename);
 985                 end_burst();
 986         }
 987 }
 988
 989
 990 /*
 991  * Generic function to output an arbitrary MIME part from an arbitrary
 992  * message number on the server.
 993  *
 994  * msgnum               Number of the item on the citadel server
 995  * partnum              The MIME part to be output
 996  * force_download       Nonzero to force set the Content-Type: header to "application/octet-stream"
 997  */
 998 void mimepart(const char *msgnum, const char *partnum, int force_download)
 999 {
1000         char buf[256];
1001         off_t bytes;
1002         char content_type[256];
1003
1004         serv_printf("OPNA %s|%s", msgnum, partnum);
1005         serv_getln(buf, sizeof buf);
1006         if (buf[0] == '2') {
1007                 bytes = extract_long(&buf[4], 0);
1008                 if (force_download) {
1009                         strcpy(content_type, "application/octet-stream");
1010                 }
1011                 else {
1012                         extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
1013                 }
1014                 output_headers(0, 0, 0, 0, 0, 0);
1015
1016                 read_server_binary(WC->WBuf, bytes);
1017                 serv_puts("CLOS");
1018                 serv_getln(buf, sizeof buf);
1019                 http_transmit_thing(content_type, 0);
1020         } else {
1021                 hprintf("HTTP/1.1 404 %s\n", &buf[4]);
1022                 output_headers(0, 0, 0, 0, 0, 0);
1023                 hprintf("Content-Type: text/plain\r\n");
1024                 wprintf(_("An error occurred while retrieving this part: %s\n"), &buf[4]);
1025                 end_burst();
1026         }
1027 }
1028
1029
1030 /*
1031  * Read any MIME part of a message, from the server, into memory.
1032  */
1033 char *load_mimepart(long msgnum, char *partnum)
1034 {
1035         char buf[SIZ];
1036         off_t bytes;
1037         char content_type[SIZ];
1038         char *content;
1039
1040         serv_printf("DLAT %ld|%s", msgnum, partnum);
1041         serv_getln(buf, sizeof buf);
1042         if (buf[0] == '6') {
1043                 bytes = extract_long(&buf[4], 0);
1044                 extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
1045
1046                 content = malloc(bytes + 2);
1047                 serv_read(content, bytes);
1048
1049                 content[bytes] = 0;     /* null terminate for good measure */
1050                 return(content);
1051         }
1052         else {
1053                 return(NULL);
1054         }
1055 }
1056
1057
1058 /*
1059  * Convenience functions to display a page containing only a string
1060  *
1061  * titlebarcolor        color of the titlebar of the frame
1062  * titlebarmsg          text to display in the title bar
1063  * messagetext          body of the box
1064  */
1065 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
1066 {
1067         hprintf("HTTP/1.1 200 OK\n");
1068         output_headers(1, 1, 2, 0, 0, 0);
1069         wprintf("<div id=\"banner\">\n");
1070         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
1071         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
1072         wprintf("</td></tr></table>\n");
1073         wprintf("</div>\n<div id=\"content\">\n");
1074         escputs(messagetext);
1075
1076         wprintf("<hr />\n");
1077         wDumpContent(1);
1078 }
1079
1080
1081 /*
1082  * Display a blank page.
1083  */
1084 void blank_page(void) {
1085         output_headers(1, 1, 0, 0, 0, 0);
1086         wDumpContent(2);
1087 }
1088
1089
1090 /*
1091  * A template has been requested
1092  */
1093 void url_do_template(void) {
1094         const StrBuf *Tmpl = sbstr("template");
1095         begin_burst();
1096         output_headers(1, 0, 0, 0, 1, 0);
1097         DoTemplate(ChrPtr(Tmpl), StrLength(Tmpl), NULL, NULL, 0);
1098         end_burst();
1099 }
1100
1101
1102
1103 /*
1104  * Offer to make any page the user's "start page."
1105  */
1106 void offer_start_page(StrBuf *Target, int nArgs, WCTemplateToken *Token, void *Context, int ContextType) {
1107         wprintf("<a href=\"change_start_page?startpage=");
1108         urlescputs(WC->this_page);
1109         wprintf("\">");
1110         wprintf(_("Make this my start page"));
1111         wprintf("</a>");
1112 #ifdef TECH_PREVIEW
1113         wprintf("<br/><a href=\"rss?room=");
1114         urlescputs(WC->wc_roomname);
1115         wprintf("\" title=\"RSS 2.0 feed for ");
1116         escputs(WC->wc_roomname);
1117         wprintf("\"><img alt=\"RSS\" border=\"0\" src=\"static/xml_button.gif\"/></a>\n");
1118 #endif
1119 }
1120
1121
1122 /*
1123  * Change the user's start page
1124  */
1125 void change_start_page(void) {
1126
1127         if (bstr("startpage") == NULL) {
1128                 safestrncpy(WC->ImportantMessage,
1129                         _("You no longer have a start page selected."),
1130                         sizeof WC->ImportantMessage);
1131                 display_main_menu();
1132                 return;
1133         }
1134
1135         set_preference("startpage", NewStrBufPlain(bstr("startpage"), -1), 1);
1136
1137         output_headers(1, 1, 0, 0, 0, 0);
1138         do_template("newstartpage", NULL);
1139         wDumpContent(1);
1140 }
1141
1142
1143
1144 /*
1145  * convenience function to indicate success
1146  */
1147 void display_success(char *successmessage)
1148 {
1149         convenience_page("007700", "OK", successmessage);
1150 }
1151
1152
1153 /*
1154  * Authorization required page
1155  * This is probably temporary and should be revisited
1156  */
1157 void authorization_required(const char *message)
1158 {
1159         hprintf("HTTP/1.1 401 Authorization Required\r\n");
1160         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", serv_info.serv_humannode);
1161         hprintf("Content-Type: text/html\r\n");
1162         wprintf("<h1>");
1163         wprintf(_("Authorization Required"));
1164         wprintf("</h1>\r\n");
1165         wprintf(_("The resource you requested requires a valid username and password. "
1166                 "You could not be logged in: %s\n"), message);
1167         wDumpContent(0);
1168
1169 }
1170
1171 /*
1172  * This function is called by the MIME parser to handle data uploaded by
1173  * the browser.  Form data, uploaded files, and the data from HTTP PUT
1174  * operations (such as those found in GroupDAV) all arrive this way.
1175  *
1176  * name         Name of the item being uploaded
1177  * filename     Filename of the item being uploaded
1178  * partnum      MIME part identifier (not needed)
1179  * disp         MIME content disposition (not needed)
1180  * content      The actual data
1181  * cbtype       MIME content-type
1182  * cbcharset    Character set
1183  * length       Content length
1184  * encoding     MIME encoding type (not needed)
1185  * cbid         Content ID (not needed)
1186  * userdata     Not used here
1187  */
1188 void upload_handler(char *name, char *filename, char *partnum, char *disp,
1189                         void *content, char *cbtype, char *cbcharset,
1190                         size_t length, char *encoding, char *cbid, void *userdata)
1191 {
1192         urlcontent *u;
1193 #ifdef DEBUG_URLSTRINGS
1194         lprintf(9, "upload_handler() name=%s, type=%s, len=%d\n", name, cbtype, length);
1195 #endif
1196         if (WC->urlstrings == NULL)
1197                 WC->urlstrings = NewHash(1, NULL);
1198
1199         /* Form fields */
1200         if ( (length > 0) && (IsEmptyStr(cbtype)) ) {
1201                 u = (urlcontent *) malloc(sizeof(urlcontent));
1202
1203                 safestrncpy(u->url_key, name, sizeof(u->url_key));
1204                 u->url_data = NewStrBufPlain(content, length);
1205
1206                 Put(WC->urlstrings, u->url_key, strlen(u->url_key), u, free_url);
1207 #ifdef DEBUG_URLSTRINGS
1208                 lprintf(9, "Key: <%s> len: [%ld] Data: <%s>\n",
1209                         u->url_key,
1210                         StrLength(u->url_data),
1211                         ChrPtr(u->url_data));
1212 #endif
1213         }
1214
1215         /** Uploaded files */
1216         if ( (length > 0) && (!IsEmptyStr(cbtype)) ) {
1217                 WC->upload = malloc(length);
1218                 if (WC->upload != NULL) {
1219                         WC->upload_length = length;
1220                         safestrncpy(WC->upload_filename, filename,
1221                                         sizeof(WC->upload_filename));
1222                         safestrncpy(WC->upload_content_type, cbtype,
1223                                         sizeof(WC->upload_content_type));
1224                         memcpy(WC->upload, content, length);
1225                 }
1226                 else {
1227                         lprintf(3, "malloc() failed: %s\n", strerror(errno));
1228                 }
1229         }
1230
1231 }
1232
1233 /*
1234  * Convenience functions to wrap around asynchronous ajax responses
1235  */
1236 void begin_ajax_response(void) {
1237         struct wcsession *WCC = WC;
1238
1239         FlushStrBuf(WCC->HBuf);
1240         output_headers(0, 0, 0, 0, 0, 0);
1241
1242         hprintf("Content-type: text/html; charset=UTF-8\r\n"
1243                 "Server: %s\r\n"
1244                 "Connection: close\r\n"
1245                 ,
1246                 PACKAGE_STRING);
1247         begin_burst();
1248 }
1249
1250 /*
1251  * print ajax response footer
1252  */
1253 void end_ajax_response(void) {
1254         wDumpContent(0);
1255 }
1256
1257 /*
1258  * Wraps a Citadel server command in an AJAX transaction.
1259  */
1260 void ajax_servcmd(void)
1261 {
1262         char buf[1024];
1263         char gcontent[1024];
1264         char *junk;
1265         size_t len;
1266
1267         begin_ajax_response();
1268
1269         serv_printf("%s", bstr("g_cmd"));
1270         serv_getln(buf, sizeof buf);
1271         wprintf("%s\n", buf);
1272
1273         if (buf[0] == '8') {
1274                 serv_printf("\n\n000");
1275         }
1276         if ((buf[0] == '1') || (buf[0] == '8')) {
1277                 while (serv_getln(gcontent, sizeof gcontent), strcmp(gcontent, "000")) {
1278                         wprintf("%s\n", gcontent);
1279                 }
1280                 wprintf("000");
1281         }
1282         if (buf[0] == '4') {
1283                 text_to_server(bstr("g_input"));
1284                 serv_puts("000");
1285         }
1286         if (buf[0] == '6') {
1287                 len = atol(&buf[4]);
1288                 junk = malloc(len);
1289                 serv_read(junk, len);
1290                 free(junk);
1291         }
1292         if (buf[0] == '7') {
1293                 len = atol(&buf[4]);
1294                 junk = malloc(len);
1295                 memset(junk, 0, len);
1296                 serv_write(junk, len);
1297                 free(junk);
1298         }
1299
1300         end_ajax_response();
1301
1302         /*
1303          * This is kind of an ugly hack, but this is the only place it can go.
1304          * If the command was GEXP, then the instant messenger window must be
1305          * running, so reset the "last_pager_check" watchdog timer so
1306          * that page_popup() doesn't try to open it a second time.
1307          */
1308         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
1309                 WC->last_pager_check = time(NULL);
1310         }
1311 }
1312
1313
1314 /*
1315  * Helper function for the asynchronous check to see if we need
1316  * to open the instant messenger window.
1317  */
1318 void seconds_since_last_gexp(void)
1319 {
1320         char buf[256];
1321
1322         if ( (time(NULL) - WC->last_pager_check) < 30) {
1323                 wprintf("NO\n");
1324         }
1325         else {
1326                 memset(buf, 5, 0);
1327                 serv_puts("NOOP");
1328                 serv_getln(buf, sizeof buf);
1329                 if (buf[3] == '*') {
1330                         wprintf("YES");
1331                 }
1332                 else {
1333                         wprintf("NO");
1334                 }
1335         }
1336 }
1337
1338 /**
1339  * \brief Detects a 'mobile' user agent
1340  */
1341 int is_mobile_ua(char *user_agent) {
1342       if (strstr(user_agent,"iPhone OS") != NULL) {
1343         return 1;
1344       } else if (strstr(user_agent,"Windows CE") != NULL) {
1345         return 1;
1346       } else if (strstr(user_agent,"SymbianOS") != NULL) {
1347         return 1;
1348       } else if (strstr(user_agent, "Opera Mobi") != NULL) {
1349         return 1;
1350       } else if (strstr(user_agent, "Firefox/2.0.0 Opera 9.51 Beta") != NULL) {
1351                  // For some reason a new install of Opera 9.51beta decided to spoof.
1352           return 1;
1353           }
1354       return 0;
1355 }
1356
1357
1358 /*
1359  * Entry point for WebCit transaction
1360  */
1361 void session_loop(HashList *HTTPHeaders, StrBuf *ReqLine, StrBuf *request_method, StrBuf *ReadBuf)
1362 {
1363         const char *pch, *pchs, *pche;
1364         void *vLine;
1365         char action[1024];
1366         char arg[8][128];
1367         size_t sizes[10];
1368         char *index[10];
1369         char buf[SIZ];
1370         int a, nBackDots, nEmpty;
1371         int ContentLength = 0;
1372         StrBuf *ContentType = NULL;
1373         StrBuf *UrlLine = NULL;
1374         StrBuf *content = NULL;
1375         const char *content_end = NULL;
1376         char browser_host[256];
1377         char user_agent[256];
1378         int body_start = 0;
1379         int is_static = 0;
1380         int n_static = 0;
1381         int len = 0;
1382         /*
1383          * We stuff these with the values coming from the client cookies,
1384          * so we can use them to reconnect a timed out session if we have to.
1385          */
1386         char c_username[SIZ];
1387         char c_password[SIZ];
1388         char c_roomname[SIZ];
1389         char c_httpauth_string[SIZ];
1390         char c_httpauth_user[SIZ];
1391         char c_httpauth_pass[SIZ];
1392         struct wcsession *WCC;
1393
1394         safestrncpy(c_username, "", sizeof c_username);
1395         safestrncpy(c_password, "", sizeof c_password);
1396         safestrncpy(c_roomname, "", sizeof c_roomname);
1397         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
1398         safestrncpy(c_httpauth_user, DEFAULT_HTTPAUTH_USER, sizeof c_httpauth_user);
1399         safestrncpy(c_httpauth_pass, DEFAULT_HTTPAUTH_PASS, sizeof c_httpauth_pass);
1400         strcpy(browser_host, "");
1401
1402         WCC= WC;
1403         if (WCC->WBuf == NULL)
1404                 WC->WBuf = NewStrBufPlain(NULL, 32768);
1405         FlushStrBuf(WCC->WBuf);
1406
1407         if (WCC->HBuf == NULL)
1408                 WCC->HBuf = NewStrBuf();
1409         FlushStrBuf(WCC->HBuf);
1410
1411         WCC->upload_length = 0;
1412         WCC->upload = NULL;
1413         WCC->is_mobile = 0;
1414         WCC->trailing_javascript = NewStrBuf();
1415
1416         /** Figure out the action */
1417         index[0] = action;
1418         sizes[0] = sizeof action;
1419         for (a=1; a<9; a++)
1420         {
1421                 index[a] = arg[a-1];
1422                 sizes[a] = sizeof arg[a-1];
1423         }
1424 ////    index[9] = &foo; todo
1425         nBackDots = 0;
1426         nEmpty = 0;
1427         for ( a = 0; a < 9; ++a)
1428         {
1429                 extract_token(index[a], ChrPtr(ReqLine), a + 1, '/', sizes[a]);
1430                 if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
1431                 if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
1432                 if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
1433                 if ((index[a][0] == '.') && (index[a][1] == '.'))
1434                         nBackDots++;
1435                 if (index[a][0] == '\0')
1436                         nEmpty++;
1437         }
1438
1439
1440         if (GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
1441             (vLine != NULL)){
1442                 cookie_to_stuff((StrBuf *)vLine, NULL,
1443                                 c_username, sizeof c_username,
1444                                 c_password, sizeof c_password,
1445                                 c_roomname, sizeof c_roomname);
1446         }
1447         if (GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
1448             (vLine!=NULL)) {
1449                 CtdlDecodeBase64(c_httpauth_string, ChrPtr((StrBuf*)vLine), StrLength((StrBuf*)vLine));
1450                 extract_token(c_httpauth_user, c_httpauth_string, 0, ':', sizeof c_httpauth_user);
1451                 extract_token(c_httpauth_pass, c_httpauth_string, 1, ':', sizeof c_httpauth_pass);
1452         }
1453         if (GetHash(HTTPHeaders, HKEY("CONTENT-LENGTH"), &vLine) &&
1454             (vLine!=NULL)) {
1455                 ContentLength = StrToi((StrBuf*)vLine);
1456         }
1457         if (GetHash(HTTPHeaders, HKEY("CONTENT-TYPE"), &vLine) &&
1458             (vLine!=NULL)) {
1459                 ContentType = (StrBuf*)vLine;
1460         }
1461         if (GetHash(HTTPHeaders, HKEY("USER-AGENT"), &vLine) &&
1462             (vLine!=NULL)) {
1463                 safestrncpy(user_agent, ChrPtr((StrBuf*)vLine), sizeof user_agent);
1464 #ifdef TECH_PREVIEW
1465                 if ((WCC->is_mobile < 0) && is_mobile_ua(&buf[12])) {
1466                         WCC->is_mobile = 1;
1467                 }
1468                 else {
1469                         WCC->is_mobile = 0;
1470                 }
1471 #endif
1472         }
1473         if ((follow_xff) &&
1474             GetHash(HTTPHeaders, HKEY("X-FORWARDED-HOST"), &vLine) &&
1475             (vLine != NULL)) {
1476                 safestrncpy(WCC->http_host,
1477                             ChrPtr((StrBuf*)vLine),
1478                             sizeof WCC->http_host);
1479         }
1480         if (IsEmptyStr(WCC->http_host) &&
1481             GetHash(HTTPHeaders, HKEY("HOST"), &vLine) &&
1482             (vLine!=NULL)) {
1483                 safestrncpy(WCC->http_host,
1484                             ChrPtr((StrBuf*)vLine),
1485                             sizeof WCC->http_host);
1486
1487         }
1488         if (GetHash(HTTPHeaders, HKEY("X-FORWARDED-FOR"), &vLine) &&
1489             (vLine!=NULL)) {
1490                 safestrncpy(browser_host,
1491                             ChrPtr((StrBuf*) vLine),
1492                             sizeof browser_host);
1493                 while (num_tokens(browser_host, ',') > 1) {
1494                         remove_token(browser_host, 0, ',');
1495                 }
1496                 striplt(browser_host);
1497         }
1498
1499         if (ContentLength > 0) {
1500                 content = NewStrBuf();
1501                 StrBufPrintf(content, "Content-type: %s\n"
1502                          "Content-length: %d\n\n",
1503                          ChrPtr(ContentType), ContentLength);
1504 /*
1505                 hprintf("Content-type: %s\n"
1506                         "Content-length: %d\n\n",
1507                         ContentType, ContentLength);
1508 */
1509                 body_start = StrLength(content);
1510
1511                 /** Read the entire input data at once. */
1512                 client_read(&WCC->http_sock, content, ReadBuf, ContentLength + body_start);
1513
1514                 if (!strncasecmp(ChrPtr(ContentType), "application/x-www-form-urlencoded", 33)) {
1515                         StrBufCutLeft(content, body_start);
1516                         ParseURLParams(content);
1517                 } else if (!strncasecmp(ChrPtr(ContentType), "multipart", 9)) {
1518                         content_end = ChrPtr(content) + ContentLength + body_start;
1519                         mime_parser(ChrPtr(content), content_end, *upload_handler, NULL, NULL, NULL, 0);
1520                 }
1521         } else {
1522                 content = NULL;
1523         }
1524
1525         /* make a note of where we are in case the user wants to save it */
1526         safestrncpy(WCC->this_page, ChrPtr(ReqLine), sizeof(WCC->this_page));
1527         remove_token(WCC->this_page, 2, ' ');
1528         remove_token(WCC->this_page, 0, ' ');
1529
1530         /* If there are variables in the URL, we must grab them now */
1531         UrlLine = NewStrBufDup(ReqLine);
1532         len = StrLength(UrlLine);
1533         pch = pchs = ChrPtr(UrlLine);
1534         pche = pchs + len;
1535         while (pch < pche) {
1536                 if ((*pch == '?') || (*pch == '&')) {
1537                         StrBufCutLeft(UrlLine, pch - pchs + 1);
1538                         ParseURLParams(UrlLine);
1539                         break;
1540                 }
1541                 pch ++;
1542         }
1543         FreeStrBuf(&UrlLine);
1544
1545         /* If it's a "force 404" situation then display the error and bail. */
1546         if (!strcmp(action, "404")) {
1547                 hprintf("HTTP/1.1 404 Not found\r\n");
1548                 hprintf("Content-Type: text/plain\r\n");
1549                 wprintf("Not found\r\n");
1550                 end_burst();
1551                 goto SKIP_ALL_THIS_CRAP;
1552         }
1553
1554         /* Static content can be sent without connecting to Citadel. */
1555         is_static = 0;
1556         for (a=0; a<ndirs && ! is_static; ++a) {
1557                 if (!strcasecmp(action, (char*)static_content_dirs[a])) { /* map web to disk location */
1558                         is_static = 1;
1559                         n_static = a;
1560                 }
1561         }
1562         if (is_static) {
1563                 if (nBackDots < 2)
1564                 {
1565                         snprintf(buf, sizeof buf, "%s/%s/%s/%s/%s/%s/%s/%s",
1566                                  static_dirs[n_static],
1567                                  index[1], index[2], index[3], index[4], index[5], index[6], index[7]);
1568                         for (a=0; a<8; ++a) {
1569                                 if (buf[strlen(buf)-1] == '/') {
1570                                         buf[strlen(buf)-1] = 0;
1571                                 }
1572                         }
1573                         for (a = 0; a < strlen(buf); ++a) {
1574                                 if (isspace(buf[a])) {
1575                                         buf[a] = 0;
1576                                 }
1577                         }
1578                         output_static(buf);
1579                 }
1580                 else
1581                 {
1582                         lprintf(9, "Suspicious request. Ignoring.");
1583                         hprintf("HTTP/1.1 404 Security check failed\r\n");
1584                         hprintf("Content-Type: text/plain\r\n");
1585                         wprintf("You have sent a malformed or invalid request.\r\n");
1586                         end_burst();
1587                 }
1588                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
1589         }
1590
1591         /* If the client sent a nonce that is incorrect, kill the request. */
1592         if (strlen(bstr("nonce")) > 0) {
1593                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
1594                         bstr("nonce"), WCC->nonce);
1595                 if (ibstr("nonce") != WCC->nonce) {
1596                         lprintf(9, "Ignoring request with mismatched nonce.\n");
1597                         hprintf("HTTP/1.1 404 Security check failed\r\n");
1598                         hprintf("Content-Type: text/plain\r\n");
1599                         wprintf("Security check failed.\r\n");
1600                         end_burst();
1601                         goto SKIP_ALL_THIS_CRAP;
1602                 }
1603         }
1604
1605         /*
1606          * If we're not connected to a Citadel server, try to hook up the
1607          * connection now.
1608          */
1609         if (!WCC->connected) {
1610                 if (!strcasecmp(ctdlhost, "uds")) {
1611                         /* unix domain socket */
1612                         snprintf(buf, SIZ, "%s/citadel.socket", ctdlport);
1613                         WCC->serv_sock = uds_connectsock(buf);
1614                 }
1615                 else {
1616                         /* tcp socket */
1617                         WCC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
1618                 }
1619
1620                 if (WCC->serv_sock < 0) {
1621                         do_logout();
1622                         goto SKIP_ALL_THIS_CRAP;
1623                 }
1624                 else {
1625                         WCC->connected = 1;
1626                         serv_getln(buf, sizeof buf);    /** get the server welcome message */
1627
1628                         /**
1629                          * From what host is our user connecting?  Go with
1630                          * the host at the other end of the HTTP socket,
1631                          * unless we are following X-Forwarded-For: headers
1632                          * and such a header has already turned up something.
1633                          */
1634                         if ( (!follow_xff) || (strlen(browser_host) == 0) ) {
1635                                 locate_host(browser_host, WCC->http_sock);
1636                         }
1637
1638                         get_serv_info(browser_host, user_agent);
1639                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
1640                                 wprintf(_("You are connected to a Citadel "
1641                                         "server running Citadel %d.%02d. \n"
1642                                         "In order to run this version of WebCit "
1643                                         "you must also have Citadel %d.%02d or"
1644                                         " newer.\n\n\n"),
1645                                                 serv_info.serv_rev_level / 100,
1646                                                 serv_info.serv_rev_level % 100,
1647                                                 MINIMUM_CIT_VERSION / 100,
1648                                                 MINIMUM_CIT_VERSION % 100
1649                                         );
1650                                 end_webcit_session();
1651                                 goto SKIP_ALL_THIS_CRAP;
1652                         }
1653                 }
1654         }
1655 ////////todo: restore language in this case
1656         /*
1657          * Functions which can be performed without logging in
1658          */
1659         if (!strcasecmp(action, "listsub")) {
1660                 do_listsub();
1661                 goto SKIP_ALL_THIS_CRAP;
1662         }
1663         if (!strcasecmp(action, "freebusy")) {
1664                 do_freebusy(ChrPtr(ReqLine));
1665                 goto SKIP_ALL_THIS_CRAP;
1666         }
1667
1668         /*
1669          * If we're not logged in, but we have HTTP Authentication data,
1670          * try logging in to Citadel using that.
1671          */
1672         if ((!WCC->logged_in)
1673            && (strlen(c_httpauth_user) > 0)
1674            && (strlen(c_httpauth_pass) > 0)) {
1675                 serv_printf("USER %s", c_httpauth_user);
1676                 serv_getln(buf, sizeof buf);
1677                 if (buf[0] == '3') {
1678                         serv_printf("PASS %s", c_httpauth_pass);
1679                         serv_getln(buf, sizeof buf);
1680                         if (buf[0] == '2') {
1681                                 become_logged_in(c_httpauth_user,
1682                                                 c_httpauth_pass, buf);
1683                                 safestrncpy(WCC->httpauth_user, c_httpauth_user, sizeof WCC->httpauth_user);
1684                                 safestrncpy(WCC->httpauth_pass, c_httpauth_pass, sizeof WCC->httpauth_pass);
1685                         } else {
1686                                 /* Should only display when password is wrong */
1687                                 authorization_required(&buf[4]);
1688                                 goto SKIP_ALL_THIS_CRAP;
1689                         }
1690                 }
1691         }
1692
1693         /* This needs to run early */
1694 #ifdef TECH_PREVIEW
1695         if (!strcasecmp(action, "rss")) {
1696                 display_rss(bstr("room"), request_method);
1697                 goto SKIP_ALL_THIS_CRAP;
1698         }
1699 #endif
1700
1701         /*
1702          * The GroupDAV stuff relies on HTTP authentication instead of
1703          * our session's authentication.
1704          */
1705         if (!strncasecmp(action, "groupdav", 8)) {
1706                 groupdav_main(HTTPHeaders,
1707                               ReqLine, request_method,
1708                               ContentType, /* do GroupDAV methods */
1709                               ContentLength, content, body_start);
1710                 if (!WCC->logged_in) {
1711                         WCC->killthis = 1;      /* If not logged in, don't */
1712                 }                               /* keep the session active */
1713                 goto SKIP_ALL_THIS_CRAP;
1714         }
1715
1716
1717         /*
1718          * Automatically send requests with any method other than GET or
1719          * POST to the GroupDAV code as well.
1720          */
1721         if ((strcasecmp(ChrPtr(request_method), "GET")) && (strcasecmp(ChrPtr(request_method), "POST"))) {
1722                 groupdav_main(HTTPHeaders, ReqLine,
1723                               request_method, ContentType, /** do GroupDAV methods */
1724                               ContentLength, content, body_start);
1725                 if (!WCC->logged_in) {
1726                         WCC->killthis = 1;      /** If not logged in, don't */
1727                 }                               /** keep the session active */
1728                 goto SKIP_ALL_THIS_CRAP;
1729         }
1730
1731         /*
1732          * If we're not logged in, but we have username and password cookies
1733          * supplied by the browser, try using them to log in.
1734          */
1735         if ((!WCC->logged_in)
1736            && (!IsEmptyStr(c_username))
1737            && (!IsEmptyStr(c_password))) {
1738                 serv_printf("USER %s", c_username);
1739                 serv_getln(buf, sizeof buf);
1740                 if (buf[0] == '3') {
1741                         serv_printf("PASS %s", c_password);
1742                         serv_getln(buf, sizeof buf);
1743                         if (buf[0] == '2') {
1744                                 StrBuf *Lang;
1745                                 become_logged_in(c_username, c_password, buf);
1746                                 if (get_preference("language", &Lang)) {
1747                                         set_selected_language(ChrPtr(Lang));
1748                                         go_selected_language();         /* set locale */
1749                                 }
1750                         }
1751                 }
1752         }
1753         /*
1754          * If we don't have a current room, but a cookie specifying the
1755          * current room is supplied, make an effort to go there.
1756          */
1757         if ((IsEmptyStr(WCC->wc_roomname)) && (!IsEmptyStr(c_roomname))) {
1758                 serv_printf("GOTO %s", c_roomname);
1759                 serv_getln(buf, sizeof buf);
1760                 if (buf[0] == '2') {
1761                         safestrncpy(WCC->wc_roomname, c_roomname, sizeof WCC->wc_roomname);
1762                 }
1763         }
1764
1765         if (!strcasecmp(action, "image")) {
1766                 output_image();
1767         } else if (!strcasecmp(action, "display_mime_icon")) {
1768                 display_mime_icon();
1769         }
1770         else {
1771                 void *vHandler;
1772                 WebcitHandler *Handler;
1773
1774                 GetHash(HandlerHash, action, strlen(action) /* TODO*/, &vHandler),
1775                         Handler = (WebcitHandler*) vHandler;
1776                 if (Handler != NULL) {
1777                         if (!WCC->logged_in && ((Handler->Flags & ANONYMOUS) == 0)) {
1778                                 display_login(NULL);
1779                         }
1780                         else {
1781                                 if((Handler->Flags & NEED_URL)) {
1782                                         if (WCC->UrlFragment1 == NULL)
1783                                                 WCC->UrlFragment1 = NewStrBuf();
1784                                         if (WCC->UrlFragment2 == NULL)
1785                                                 WCC->UrlFragment2 = NewStrBuf();
1786                                         StrBufPrintf(WCC->UrlFragment1, "%s", index[1]);
1787                                         StrBufPrintf(WCC->UrlFragment2, "%s", index[2]);
1788                                 }
1789                                 if ((Handler->Flags & AJAX) != 0)
1790                                         begin_ajax_response();
1791                                 Handler->F();
1792                                 if ((Handler->Flags & AJAX) != 0)
1793                                         end_ajax_response();
1794                         }
1795                 }
1796         /* When all else fais, display the main menu. */
1797         else {
1798                 if (!WCC->logged_in)
1799                         display_login(NULL);
1800                 else
1801                         display_main_menu();
1802         }
1803 }
1804 SKIP_ALL_THIS_CRAP:
1805         fflush(stdout);
1806         if (content != NULL) {
1807                 FreeStrBuf(&content);
1808                 content = NULL;
1809         }
1810         free_urls();
1811         if (WCC->upload_length > 0) {
1812                 free(WCC->upload);
1813                 WCC->upload_length = 0;
1814         }
1815         FreeStrBuf(&WCC->trailing_javascript);
1816 }
1817
1818
1819 /*
1820  * Replacement for sleep() that uses select() in order to avoid SIGALRM
1821  */
1822 void sleeeeeeeeeep(int seconds)
1823 {
1824         struct timeval tv;
1825
1826         tv.tv_sec = seconds;
1827         tv.tv_usec = 0;
1828         select(0, NULL, NULL, NULL, &tv);
1829 }
1830
1831 void diagnostics(void)
1832 {
1833         output_headers(1, 1, 1, 0, 0, 0);
1834         wprintf("Session: %d<hr />\n", WC->wc_session);
1835         wprintf("Command: <br /><PRE>\n");
1836         StrEscPuts(WC->UrlFragment1);
1837         wprintf("<br />\n");
1838         StrEscPuts(WC->UrlFragment2);
1839         wprintf("</PRE><hr />\n");
1840         wprintf("Variables: <br /><PRE>\n");
1841         dump_vars();
1842         wprintf("</PRE><hr />\n");
1843         wDumpContent(1);
1844 }
1845
1846 void view_mimepart(void) {
1847         mimepart(ChrPtr(WC->UrlFragment1),
1848                  ChrPtr(WC->UrlFragment2),
1849                  0);
1850 }
1851
1852 void download_mimepart(void) {
1853         mimepart(ChrPtr(WC->UrlFragment1),
1854                  ChrPtr(WC->UrlFragment2),
1855                  1);
1856 }
1857
1858 void view_postpart(void) {
1859         postpart(ChrPtr(WC->UrlFragment1),
1860                  ChrPtr(WC->UrlFragment2),
1861                  0);
1862 }
1863
1864 void download_postpart(void) {
1865         postpart(ChrPtr(WC->UrlFragment1),
1866                  ChrPtr(WC->UrlFragment2),
1867                  1);
1868 }
1869
1870
1871 int ConditionalImportantMesage(WCTemplateToken *Tokens, void *Context, int ContextType)
1872 {
1873         struct wcsession *WCC = WC;
1874         if (WCC != NULL)
1875                 return (!IsEmptyStr(WCC->ImportantMessage));
1876         else
1877                 return 0;
1878 }
1879
1880 void tmplput_importantmessage(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
1881 {
1882         struct wcsession *WCC = WC;
1883
1884         if (WCC != NULL) {
1885                 StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
1886                         WCC->ImportantMessage[0] = '\0';
1887         }
1888 }
1889
1890 int ConditionalBstr(WCTemplateToken *Tokens, void *Context, int ContextType)
1891 {
1892         if(Tokens->nParameters == 1)
1893                 return HaveBstr(Tokens->Params[0]->Start,
1894                                 Tokens->Params[0]->len);
1895         else
1896                 return strcmp(Bstr(Tokens->Params[0]->Start,
1897                                    Tokens->Params[0]->len),
1898                               Tokens->Params[1]->Start) == 0;
1899 }
1900
1901 void tmplput_bstr(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
1902 {
1903         StrBufAppendBuf(Target,
1904                         SBstr(Tokens->Params[0]->Start,
1905                               Tokens->Params[0]->len), 0);
1906 }
1907
1908 void
1909 InitModule_WEBCIT
1910 (void)
1911 {
1912         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS);
1913         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
1914         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX);
1915         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
1916         WebcitAddUrlHandler(HKEY("change_start_page"), change_start_page, 0);
1917         WebcitAddUrlHandler(HKEY("toggle_self_service"), toggle_self_service, 0);
1918         WebcitAddUrlHandler(HKEY("vcardphoto"), display_vcard_photo_img, NEED_URL);
1919         WebcitAddUrlHandler(HKEY("mimepart"), view_mimepart, NEED_URL);
1920         WebcitAddUrlHandler(HKEY("mimepart_download"), download_mimepart, NEED_URL);
1921         WebcitAddUrlHandler(HKEY("postpart"), view_postpart, NEED_URL);
1922         WebcitAddUrlHandler(HKEY("postpart_download"), download_postpart, NEED_URL);
1923         WebcitAddUrlHandler(HKEY("diagnostics"), diagnostics, NEED_URL);
1924
1925         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
1926         RegisterConditional(HKEY("COND:BSTR"), 1, ConditionalBstr, CTX_NONE);
1927         RegisterNamespace("BSTR", 1, 2, tmplput_bstr, CTX_NONE);
1928         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
1929         RegisterNamespace("OFFERSTARTPAGE", 0, 0, offer_start_page, CTX_NONE);
1930 }