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 /*
 386  * wrap up an HTTP session, closes tags, etc.
 387  *
 388  * print_standard_html_footer should be set to:
 389  * 0 to transmit only,
 390  * 1 to append the main menu and closing tags,
 391  * 2 to append the closing tags only.
 392  */
 393 void wDumpContent(int print_standard_html_footer)
 394 {
 395         if (print_standard_html_footer) {
 396                 wprintf("</div>\n");    /* end of "text" div */
 397                 do_template("trailing", NULL);
 398         }
 399
 400         /* If we've been saving it all up for one big output burst,
 401          * go ahead and do that now.
 402          */
 403         end_burst();
 404 }
 405
 406
 407
 408 /*
 409  * Copy a string, escaping characters which have meaning in HTML.
 410  *
 411  * target              target buffer
 412  * strbuf              source buffer
 413  * nbsp                        If nonzero, spaces are converted to non-breaking spaces.
 414  * nolinebreaks                if set, linebreaks are removed from the string.
 415  */
 416 long stresc(char *target, long tSize, char *strbuf, int nbsp, int nolinebreaks)
 417 {
 418         char *aptr, *bptr, *eptr;
 419
 420         *target = '\0';
 421         aptr = strbuf;
 422         bptr = target;
 423         eptr = target + tSize - 6; // our biggest unit to put in...
 424
 425
 426         while ((bptr < eptr) && !IsEmptyStr(aptr) ){
 427                 if (*aptr == '<') {
 428                         memcpy(bptr, "&lt;", 4);
 429                         bptr += 4;
 430                 }
 431                 else if (*aptr == '>') {
 432                         memcpy(bptr, "&gt;", 4);
 433                         bptr += 4;
 434                 }
 435                 else if (*aptr == '&') {
 436                         memcpy(bptr, "&amp;", 5);
 437                         bptr += 5;
 438                 }
 439                 else if (*aptr == '\"') {
 440                         memcpy(bptr, "&quot;", 6);
 441                         bptr += 6;
 442                 }
 443                 else if (*aptr == '\'') {
 444                         memcpy(bptr, "&#39;", 5);
 445                         bptr += 5;
 446                 }
 447                 else if (*aptr == LB) {
 448                         *bptr = '<';
 449                         bptr ++;
 450                 }
 451                 else if (*aptr == RB) {
 452                         *bptr = '>';
 453                         bptr ++;
 454                 }
 455                 else if (*aptr == QU) {
 456                         *bptr ='"';
 457                         bptr ++;
 458                 }
 459                 else if ((*aptr == 32) && (nbsp == 1)) {
 460                         memcpy(bptr, "&nbsp;", 6);
 461                         bptr += 6;
 462                 }
 463                 else if ((*aptr == '\n') && (nolinebreaks)) {
 464                         *bptr='\0';     /* nothing */
 465                 }
 466                 else if ((*aptr == '\r') && (nolinebreaks)) {
 467                         *bptr='\0';     /* nothing */
 468                 }
 469                 else{
 470                         *bptr = *aptr;
 471                         bptr++;
 472                 }
 473                 aptr ++;
 474         }
 475         *bptr = '\0';
 476         if ((bptr = eptr - 1 ) && !IsEmptyStr(aptr) )
 477                 return -1;
 478         return (bptr - target);
 479 }
 480
 481
 482 void escputs1(char *strbuf, int nbsp, int nolinebreaks)
 483 {
 484         StrEscAppend(WC->WBuf, NULL, strbuf, nbsp, nolinebreaks);
 485 }
 486
 487 void StrEscputs1(const StrBuf *strbuf, int nbsp, int nolinebreaks)
 488 {
 489         StrEscAppend(WC->WBuf, strbuf, NULL, nbsp, nolinebreaks);
 490 }
 491
 492 /*
 493  * static wrapper for ecsputs1
 494  */
 495 void escputs(char *strbuf)
 496 {
 497         escputs1(strbuf, 0, 0);
 498 }
 499
 500
 501 /*
 502  * static wrapper for ecsputs1
 503  */
 504 void StrEscPuts(const StrBuf *strbuf)
 505 {
 506         StrEscputs1(strbuf, 0, 0);
 507 }
 508
 509
 510 /*
 511  * urlescape buffer and print it to the client
 512  */
 513 void urlescputs(const char *strbuf)
 514 {
 515         StrBufUrlescAppend(WC->WBuf, NULL, strbuf);
 516 }
 517
 518 /*
 519  * urlescape buffer and print it to the client
 520  */
 521 void UrlescPutStrBuf(const StrBuf *strbuf)
 522 {
 523         StrBufUrlescAppend(WC->WBuf, strbuf, NULL);
 524 }
 525
 526 /**
 527  * urlescape buffer and print it as header
 528  */
 529 void hurlescputs(const char *strbuf)
 530 {
 531         StrBufUrlescAppend(WC->HBuf, NULL, strbuf);
 532 }
 533
 534
 535 /*
 536  * Copy a string, escaping characters for JavaScript strings.
 537  */
 538 void jsesc(char *target, size_t tlen, char *strbuf)
 539 {
 540         int len;
 541         char *tend;
 542         char *send;
 543         char *tptr;
 544         char *sptr;
 545
 546         target[0]='\0';
 547         len = strlen (strbuf);
 548         send = strbuf + len;
 549         tend = target + tlen;
 550         sptr = strbuf;
 551         tptr = target;
 552
 553         while (!IsEmptyStr(sptr) &&
 554                (sptr < send) &&
 555                (tptr < tend)) {
 556
 557                 if (*sptr == '<')
 558                         *tptr = '[';
 559                 else if (*sptr == '>')
 560                         *tptr = ']';
 561                 else if (*sptr == '\'') {
 562                         if (tend - tptr < 3)
 563                                 return;
 564                         *(tptr++) = '\\';
 565                         *tptr = '\'';
 566                 }
 567                 else if (*sptr == '"') {
 568                         if (tend - tptr < 8)
 569                                 return;
 570                         *(tptr++) = '&';
 571                         *(tptr++) = 'q';
 572                         *(tptr++) = 'u';
 573                         *(tptr++) = 'o';
 574                         *(tptr++) = 't';
 575                         *tptr = ';';
 576                 }
 577                 else if (*sptr == '&') {
 578                         if (tend - tptr < 7)
 579                                 return;
 580                         *(tptr++) = '&';
 581                         *(tptr++) = 'a';
 582                         *(tptr++) = 'm';
 583                         *(tptr++) = 'p';
 584                         *tptr = ';';
 585                 } else {
 586                         *tptr = *sptr;
 587                 }
 588                 tptr++; sptr++;
 589         }
 590         *tptr = '\0';
 591 }
 592
 593 /*
 594  * escape and print javascript
 595  */
 596 void jsescputs(char *strbuf)
 597 {
 598         char outbuf[SIZ];
 599
 600         jsesc(outbuf, SIZ, strbuf);
 601         wprintf("%s", outbuf);
 602 }
 603
 604 /*
 605  * print a string to the client after cleaning it with msgesc() and stresc()
 606  */
 607 void msgescputs1( char *strbuf)
 608 {
 609         StrBuf *OutBuf;
 610
 611         if ((strbuf == NULL) || IsEmptyStr(strbuf))
 612                 return;
 613         OutBuf = NewStrBuf();
 614         StrMsgEscAppend(OutBuf, NULL, strbuf);
 615         StrEscAppend(WC->WBuf, OutBuf, NULL, 0, 0);
 616         FreeStrBuf(&OutBuf);
 617 }
 618
 619 /*
 620  * print a string to the client after cleaning it with msgesc()
 621  */
 622 void msgescputs(char *strbuf) {
 623         if ((strbuf != NULL) && !IsEmptyStr(strbuf))
 624                 StrMsgEscAppend(WC->WBuf, NULL, strbuf);
 625 }
 626
 627
 628
 629
 630 /*
 631  * Output HTTP headers and leading HTML for a page
 632  */
 633 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 634                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 635
 636                         int do_room_banner,     /* 0=no, 1=yes,
 637                                                  * 2 = I'm going to embed my own, so don't open the
 638                                                  *     <div id="content"> either.
 639                                                  */
 640
 641                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 642                         int suppress_check,     /* 1 = suppress check for instant messages          */
 643                         int cache               /* 1 = allow browser to cache this page             */
 644 ) {
 645         char cookie[1024];
 646         char httpnow[128];
 647
 648         hprintf("HTTP/1.1 200 OK\n");
 649         http_datestring(httpnow, sizeof httpnow, time(NULL));
 650
 651         if (do_httpheaders) {
 652                 hprintf("Content-type: text/html; charset=utf-8\r\n"
 653                         "Server: %s / %s\n"
 654                         "Connection: close\r\n",
 655                         PACKAGE_STRING, serv_info.serv_software
 656                 );
 657         }
 658
 659         if (cache) {
 660                 char httpTomorow[128];
 661
 662                 http_datestring(httpTomorow, sizeof httpTomorow,
 663                                 time(NULL) + 60 * 60 * 24 * 2);
 664
 665                 hprintf("Pragma: public\r\n"
 666                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 667                         "Last-modified: %s\r\n"
 668                         "Expires: %s\r\n",
 669                         httpnow,
 670                         httpTomorow
 671                 );
 672         }
 673         else {
 674                 hprintf("Pragma: no-cache\r\n"
 675                         "Cache-Control: no-store\r\n"
 676                         "Expires: -1\r\n"
 677                 );
 678         }
 679
 680         stuff_to_cookie(cookie, 1024, WC->wc_session, WC->wc_username,
 681                         WC->wc_password, WC->wc_roomname);
 682
 683         if (unset_cookies) {
 684                 hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 685         } else {
 686                 hprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 687                 if (server_cookie != NULL) {
 688                         hprintf("%s\n", server_cookie);
 689                 }
 690         }
 691
 692         if (do_htmlhead) {
 693                 begin_burst();
 694                 if (!access("static.local/webcit.css", R_OK)) {
 695                         svprintf(HKEY("CSSLOCAL"), WCS_STRING,
 696                            "<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\">"
 697                         );
 698                 }
 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         lprintf(9, "http_transmit_thing(%s)%s\n",
 763                 content_type,
 764                 (is_static ? " (static)" : "")
 765         );
 766         output_headers(0, 0, 0, 0, 0, is_static);
 767
 768         hprintf("Content-type: %s\r\n"
 769                 "Server: %s\r\n"
 770                 "Connection: close\r\n",
 771                 content_type,
 772                 PACKAGE_STRING);
 773
 774         end_burst();
 775 }
 776
 777 /*
 778  * print menu box like used in the floor view or admin interface.
 779  * This function takes pair of strings as va_args,
 780  * Title        Title string of the box
 781  * Class        CSS Class for the box
 782  * nLines       How many string pairs should we print? (URL, UrlText)
 783  * ...          Pairs of URL Strings and their Names
 784  */
 785 void print_menu_box(char* Title, char *Class, int nLines, ...)
 786 {
 787         va_list arg_list;
 788         long i;
 789
 790         svput("BOXTITLE", WCS_STRING, Title);
 791         do_template("beginbox", NULL);
 792
 793         wprintf("<ul class=\"%s\">", Class);
 794
 795         va_start(arg_list, nLines);
 796         for (i = 0; i < nLines; ++i)
 797         {
 798                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 799                 wprintf((char *) va_arg(arg_list, char *));
 800                 wprintf("</a></li>\n");
 801         }
 802         va_end (arg_list);
 803
 804         wprintf("</a></li>\n");
 805
 806         wprintf("</ul>");
 807
 808         do_template("endbox", NULL);
 809 }
 810
 811
 812 /*
 813  * dump out static pages from disk
 814  */
 815 void output_static(char *what)
 816 {
 817         int fd;
 818         struct stat statbuf;
 819         off_t bytes;
 820         off_t count = 0;
 821         const char *content_type;
 822         int len;
 823         const char *Err;
 824
 825         fd = open(what, O_RDONLY);
 826         if (fd <= 0) {
 827                 lprintf(9, "output_static('%s')  -- NOT FOUND --\n", what);
 828                 hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 829                 hprintf("Content-Type: text/plain\r\n");
 830                 wprintf("Cannot open %s: %s\r\n", what, strerror(errno));
 831                 end_burst();
 832         } else {
 833                 len = strlen (what);
 834                 content_type = GuessMimeByFilename(what, len);
 835
 836                 if (fstat(fd, &statbuf) == -1) {
 837                         lprintf(9, "output_static('%s')  -- FSTAT FAILED --\n", what);
 838                         hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 839                         hprintf("Content-Type: text/plain\r\n");
 840                         wprintf("Cannot fstat %s: %s\n", what, strerror(errno));
 841                         end_burst();
 842                         return;
 843                 }
 844
 845                 count = 0;
 846                 bytes = statbuf.st_size;
 847
 848                 if (StrBufReadBLOB(WC->WBuf, &fd, 1, bytes, &Err) < 0)
 849                 {
 850                         if (fd > 0) close(fd);
 851                         lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) --\n", what, strerror(errno));
 852                                 hprintf("HTTP/1.1 500 internal server error \r\n");
 853                                 hprintf("Content-Type: text/plain\r\n");
 854                                 end_burst();
 855                                 return;
 856                 }
 857
 858
 859                 close(fd);
 860                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
 861                 http_transmit_thing(content_type, 1);
 862         }
 863         if (yesbstr("force_close_session")) {
 864                 end_webcit_session();
 865         }
 866 }
 867
 868 /*
 869  * When the browser requests an image file from the Citadel server,
 870  * this function is called to transmit it.
 871  */
 872 void output_image()
 873 {
 874         struct wcsession *WCC = WC;
 875         char buf[SIZ];
 876         off_t bytes;
 877         const char *MimeType;
 878
 879         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 880         serv_getln(buf, sizeof buf);
 881         if (buf[0] == '2') {
 882                 bytes = extract_long(&buf[4], 0);
 883
 884                 /** Read it from the server */
 885
 886                 if (read_server_binary(WCC->WBuf, bytes) > 0) {
 887                         serv_puts("CLOS");
 888                         serv_getln(buf, sizeof buf);
 889
 890                         MimeType = GuessMimeType (ChrPtr(WCC->WBuf), StrLength(WCC->WBuf));
 891                         /** Write it to the browser */
 892                         if (!IsEmptyStr(MimeType))
 893                         {
 894                                 http_transmit_thing(MimeType, 0);
 895                                 return;
 896                         }
 897                 }
 898                 /* hm... unknown mimetype? fallback to blank gif */
 899         }
 900
 901
 902         /*
 903          * Instead of an ugly 404, send a 1x1 transparent GIF
 904          * when there's no such image on the server.
 905          */
 906         char blank_gif[SIZ];
 907         snprintf (blank_gif, SIZ, "%s%s", static_dirs[0], "/blank.gif");
 908         output_static(blank_gif);
 909 }
 910
 911 /*
 912  * Extract an embedded photo from a vCard for display on the client
 913  */
 914 void display_vcard_photo_img(void)
 915 {
 916         long msgnum = 0L;
 917         char *vcard;
 918         struct vCard *v;
 919         char *photosrc;
 920         const char *contentType;
 921         struct wcsession *WCC = WC;
 922
 923         msgnum = StrTol(WCC->UrlFragment1);
 924
 925         vcard = load_mimepart(msgnum,"1");
 926         v = vcard_load(vcard);
 927
 928         photosrc = vcard_get_prop(v, "PHOTO", 1,0,0);
 929         FlushStrBuf(WCC->WBuf);
 930         StrBufAppendBufPlain(WCC->WBuf, photosrc, -1, 0);
 931         if (StrBufDecodeBase64(WCC->WBuf) <= 0) {
 932                 FlushStrBuf(WCC->WBuf);
 933
 934                 hprintf("HTTP/1.1 500 %s\n","Unable to get photo");
 935                 output_headers(0, 0, 0, 0, 0, 0);
 936                 hprintf("Content-Type: text/plain\r\n");
 937                 wprintf(_("Could Not decode vcard photo\n"));
 938                 end_burst();
 939                 return;
 940         }
 941         contentType = GuessMimeType(ChrPtr(WCC->WBuf), StrLength(WCC->WBuf));
 942         http_transmit_thing(contentType, 0);
 943         free(v);
 944         free(photosrc);
 945 }
 946
 947 /*
 948  * Generic function to output an arbitrary MIME part from an arbitrary
 949  * message number on the server.
 950  *
 951  * msgnum               Number of the item on the citadel server
 952  * partnum              The MIME part to be output
 953  * force_download       Nonzero to force set the Content-Type: header to "application/octet-stream"
 954  */
 955 void mimepart(const char *msgnum, const char *partnum, int force_download)
 956 {
 957         char buf[256];
 958         off_t bytes;
 959         char content_type[256];
 960
 961         serv_printf("OPNA %s|%s", msgnum, partnum);
 962         serv_getln(buf, sizeof buf);
 963         if (buf[0] == '2') {
 964                 bytes = extract_long(&buf[4], 0);
 965                 if (force_download) {
 966                         strcpy(content_type, "application/octet-stream");
 967                 }
 968                 else {
 969                         extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
 970                 }
 971                 output_headers(0, 0, 0, 0, 0, 0);
 972
 973                 read_server_binary(WC->WBuf, bytes);
 974                 serv_puts("CLOS");
 975                 serv_getln(buf, sizeof buf);
 976                 http_transmit_thing(content_type, 0);
 977         } else {
 978                 hprintf("HTTP/1.1 404 %s\n", &buf[4]);
 979                 output_headers(0, 0, 0, 0, 0, 0);
 980                 hprintf("Content-Type: text/plain\r\n");
 981                 wprintf(_("An error occurred while retrieving this part: %s\n"), &buf[4]);
 982                 end_burst();
 983         }
 984 }
 985
 986
 987 /*
 988  * Read any MIME part of a message, from the server, into memory.
 989  */
 990 char *load_mimepart(long msgnum, char *partnum)
 991 {
 992         char buf[SIZ];
 993         off_t bytes;
 994         char content_type[SIZ];
 995         char *content;
 996
 997         serv_printf("DLAT %ld|%s", msgnum, partnum);
 998         serv_getln(buf, sizeof buf);
 999         if (buf[0] == '6') {
1000                 bytes = extract_long(&buf[4], 0);
1001                 extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
1002
1003                 content = malloc(bytes + 2);
1004                 serv_read(content, bytes);
1005
1006                 content[bytes] = 0;     /* null terminate for good measure */
1007                 return(content);
1008         }
1009         else {
1010                 return(NULL);
1011         }
1012 }
1013
1014
1015 /*
1016  * Convenience functions to display a page containing only a string
1017  *
1018  * titlebarcolor        color of the titlebar of the frame
1019  * titlebarmsg          text to display in the title bar
1020  * messagetext          body of the box
1021  */
1022 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
1023 {
1024         hprintf("HTTP/1.1 200 OK\n");
1025         output_headers(1, 1, 2, 0, 0, 0);
1026         wprintf("<div id=\"banner\">\n");
1027         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
1028         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
1029         wprintf("</td></tr></table>\n");
1030         wprintf("</div>\n<div id=\"content\">\n");
1031         escputs(messagetext);
1032
1033         wprintf("<hr />\n");
1034         wDumpContent(1);
1035 }
1036
1037
1038 /*
1039  * Display a blank page.
1040  */
1041 void blank_page(void) {
1042         output_headers(1, 1, 0, 0, 0, 0);
1043         wDumpContent(2);
1044 }
1045
1046
1047 /*
1048  * A template has been requested
1049  */
1050 void url_do_template(void) {
1051         const StrBuf *Tmpl = sbstr("template");
1052         begin_burst();
1053         output_headers(1, 0, 0, 0, 1, 0);
1054         DoTemplate(ChrPtr(Tmpl), StrLength(Tmpl), NULL, NULL, 0);
1055         end_burst();
1056 }
1057
1058
1059
1060 /*
1061  * Offer to make any page the user's "start page."
1062  */
1063 void offer_start_page(StrBuf *Target, int nArgs, WCTemplateToken *Token, void *Context, int ContextType) {
1064         wprintf("<a href=\"change_start_page?startpage=");
1065         urlescputs(WC->this_page);
1066         wprintf("\">");
1067         wprintf(_("Make this my start page"));
1068         wprintf("</a>");
1069 #ifdef TECH_PREVIEW
1070         wprintf("<br/><a href=\"rss?room=");
1071         urlescputs(WC->wc_roomname);
1072         wprintf("\" title=\"RSS 2.0 feed for ");
1073         escputs(WC->wc_roomname);
1074         wprintf("\"><img alt=\"RSS\" border=\"0\" src=\"static/xml_button.gif\"/></a>\n");
1075 #endif
1076 }
1077
1078
1079 /*
1080  * Change the user's start page
1081  */
1082 void change_start_page(void) {
1083
1084         if (bstr("startpage") == NULL) {
1085                 safestrncpy(WC->ImportantMessage,
1086                         _("You no longer have a start page selected."),
1087                         sizeof WC->ImportantMessage);
1088                 display_main_menu();
1089                 return;
1090         }
1091
1092         set_preference("startpage", NewStrBufPlain(bstr("startpage"), -1), 1);
1093
1094         output_headers(1, 1, 0, 0, 0, 0);
1095         do_template("newstartpage", NULL);
1096         wDumpContent(1);
1097 }
1098
1099
1100
1101 /*
1102  * convenience function to indicate success
1103  */
1104 void display_success(char *successmessage)
1105 {
1106         convenience_page("007700", "OK", successmessage);
1107 }
1108
1109
1110 /*
1111  * Authorization required page
1112  * This is probably temporary and should be revisited
1113  */
1114 void authorization_required(const char *message)
1115 {
1116         hprintf("HTTP/1.1 401 Authorization Required\r\n");
1117         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", serv_info.serv_humannode);
1118         hprintf("Content-Type: text/html\r\n");
1119         wprintf("<h1>");
1120         wprintf(_("Authorization Required"));
1121         wprintf("</h1>\r\n");
1122         wprintf(_("The resource you requested requires a valid username and password. "
1123                 "You could not be logged in: %s\n"), message);
1124         wDumpContent(0);
1125
1126 }
1127
1128 /*
1129  * This function is called by the MIME parser to handle data uploaded by
1130  * the browser.  Form data, uploaded files, and the data from HTTP PUT
1131  * operations (such as those found in GroupDAV) all arrive this way.
1132  *
1133  * name         Name of the item being uploaded
1134  * filename     Filename of the item being uploaded
1135  * partnum      MIME part identifier (not needed)
1136  * disp         MIME content disposition (not needed)
1137  * content      The actual data
1138  * cbtype       MIME content-type
1139  * cbcharset    Character set
1140  * length       Content length
1141  * encoding     MIME encoding type (not needed)
1142  * cbid         Content ID (not needed)
1143  * userdata     Not used here
1144  */
1145 void upload_handler(char *name, char *filename, char *partnum, char *disp,
1146                         void *content, char *cbtype, char *cbcharset,
1147                         size_t length, char *encoding, char *cbid, void *userdata)
1148 {
1149         urlcontent *u;
1150 #ifdef DEBUG_URLSTRINGS
1151         lprintf(9, "upload_handler() name=%s, type=%s, len=%d\n", name, cbtype, length);
1152 #endif
1153         if (WC->urlstrings == NULL)
1154                 WC->urlstrings = NewHash(1, NULL);
1155
1156         /* Form fields */
1157         if ( (length > 0) && (IsEmptyStr(cbtype)) ) {
1158                 u = (urlcontent *) malloc(sizeof(urlcontent));
1159
1160                 safestrncpy(u->url_key, name, sizeof(u->url_key));
1161                 u->url_data = NewStrBufPlain(content, length);
1162
1163                 Put(WC->urlstrings, u->url_key, strlen(u->url_key), u, free_url);
1164 #ifdef DEBUG_URLSTRINGS
1165                 lprintf(9, "Key: <%s> len: [%ld] Data: <%s>\n",
1166                         u->url_key,
1167                         StrLength(u->url_data),
1168                         ChrPtr(u->url_data));
1169 #endif
1170         }
1171
1172         /** Uploaded files */
1173         if ( (length > 0) && (!IsEmptyStr(cbtype)) ) {
1174                 WC->upload = malloc(length);
1175                 if (WC->upload != NULL) {
1176                         WC->upload_length = length;
1177                         safestrncpy(WC->upload_filename, filename,
1178                                         sizeof(WC->upload_filename));
1179                         safestrncpy(WC->upload_content_type, cbtype,
1180                                         sizeof(WC->upload_content_type));
1181                         memcpy(WC->upload, content, length);
1182                 }
1183                 else {
1184                         lprintf(3, "malloc() failed: %s\n", strerror(errno));
1185                 }
1186         }
1187
1188 }
1189
1190 /*
1191  * Convenience functions to wrap around asynchronous ajax responses
1192  */
1193 void begin_ajax_response(void) {
1194         struct wcsession *WCC = WC;
1195
1196         FlushStrBuf(WCC->HBuf);
1197         output_headers(0, 0, 0, 0, 0, 0);
1198
1199         hprintf("Content-type: text/html; charset=UTF-8\r\n"
1200                 "Server: %s\r\n"
1201                 "Connection: close\r\n"
1202                 ,
1203                 PACKAGE_STRING);
1204         begin_burst();
1205 }
1206
1207 /*
1208  * print ajax response footer
1209  */
1210 void end_ajax_response(void) {
1211         wDumpContent(0);
1212 }
1213
1214 /*
1215  * Wraps a Citadel server command in an AJAX transaction.
1216  */
1217 void ajax_servcmd(void)
1218 {
1219         char buf[1024];
1220         char gcontent[1024];
1221         char *junk;
1222         size_t len;
1223
1224         begin_ajax_response();
1225
1226         serv_printf("%s", bstr("g_cmd"));
1227         serv_getln(buf, sizeof buf);
1228         wprintf("%s\n", buf);
1229
1230         if (buf[0] == '8') {
1231                 serv_printf("\n\n000");
1232         }
1233         if ((buf[0] == '1') || (buf[0] == '8')) {
1234                 while (serv_getln(gcontent, sizeof gcontent), strcmp(gcontent, "000")) {
1235                         wprintf("%s\n", gcontent);
1236                 }
1237                 wprintf("000");
1238         }
1239         if (buf[0] == '4') {
1240                 text_to_server(bstr("g_input"));
1241                 serv_puts("000");
1242         }
1243         if (buf[0] == '6') {
1244                 len = atol(&buf[4]);
1245                 junk = malloc(len);
1246                 serv_read(junk, len);
1247                 free(junk);
1248         }
1249         if (buf[0] == '7') {
1250                 len = atol(&buf[4]);
1251                 junk = malloc(len);
1252                 memset(junk, 0, len);
1253                 serv_write(junk, len);
1254                 free(junk);
1255         }
1256
1257         end_ajax_response();
1258
1259         /*
1260          * This is kind of an ugly hack, but this is the only place it can go.
1261          * If the command was GEXP, then the instant messenger window must be
1262          * running, so reset the "last_pager_check" watchdog timer so
1263          * that page_popup() doesn't try to open it a second time.
1264          */
1265         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
1266                 WC->last_pager_check = time(NULL);
1267         }
1268 }
1269
1270
1271 /*
1272  * Helper function for the asynchronous check to see if we need
1273  * to open the instant messenger window.
1274  */
1275 void seconds_since_last_gexp(void)
1276 {
1277         char buf[256];
1278
1279         if ( (time(NULL) - WC->last_pager_check) < 30) {
1280                 wprintf("NO\n");
1281         }
1282         else {
1283                 memset(buf, 5, 0);
1284                 serv_puts("NOOP");
1285                 serv_getln(buf, sizeof buf);
1286                 if (buf[3] == '*') {
1287                         wprintf("YES");
1288                 }
1289                 else {
1290                         wprintf("NO");
1291                 }
1292         }
1293 }
1294
1295 /**
1296  * \brief Detects a 'mobile' user agent
1297  */
1298 int is_mobile_ua(char *user_agent) {
1299       if (strstr(user_agent,"iPhone OS") != NULL) {
1300         return 1;
1301       } else if (strstr(user_agent,"Windows CE") != NULL) {
1302         return 1;
1303       } else if (strstr(user_agent,"SymbianOS") != NULL) {
1304         return 1;
1305       } else if (strstr(user_agent, "Opera Mobi") != NULL) {
1306         return 1;
1307       } else if (strstr(user_agent, "Firefox/2.0.0 Opera 9.51 Beta") != NULL) {
1308                  // For some reason a new install of Opera 9.51beta decided to spoof.
1309           return 1;
1310           }
1311       return 0;
1312 }
1313
1314
1315 /*
1316  * Entry point for WebCit transaction
1317  */
1318 void session_loop(HashList *HTTPHeaders, StrBuf *ReqLine, StrBuf *request_method, StrBuf *ReadBuf)
1319 {
1320         const char *pch, *pchs, *pche;
1321         void *vLine;
1322         char action[1024];
1323         char arg[8][128];
1324         size_t sizes[10];
1325         char *index[10];
1326         char buf[SIZ];
1327         int a, nBackDots, nEmpty;
1328         int ContentLength = 0;
1329         StrBuf *ContentType = NULL;
1330         StrBuf *UrlLine = NULL;
1331         StrBuf *content = NULL;
1332         const char *content_end = NULL;
1333         char browser_host[256];
1334         char user_agent[256];
1335         int body_start = 0;
1336         int is_static = 0;
1337         int n_static = 0;
1338         int len = 0;
1339         /*
1340          * We stuff these with the values coming from the client cookies,
1341          * so we can use them to reconnect a timed out session if we have to.
1342          */
1343         char c_username[SIZ];
1344         char c_password[SIZ];
1345         char c_roomname[SIZ];
1346         char c_httpauth_string[SIZ];
1347         char c_httpauth_user[SIZ];
1348         char c_httpauth_pass[SIZ];
1349         struct wcsession *WCC;
1350
1351         safestrncpy(c_username, "", sizeof c_username);
1352         safestrncpy(c_password, "", sizeof c_password);
1353         safestrncpy(c_roomname, "", sizeof c_roomname);
1354         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
1355         safestrncpy(c_httpauth_user, DEFAULT_HTTPAUTH_USER, sizeof c_httpauth_user);
1356         safestrncpy(c_httpauth_pass, DEFAULT_HTTPAUTH_PASS, sizeof c_httpauth_pass);
1357         strcpy(browser_host, "");
1358
1359         WCC= WC;
1360         if (WCC->WBuf == NULL)
1361                 WC->WBuf = NewStrBufPlain(NULL, 32768);
1362         FlushStrBuf(WCC->WBuf);
1363
1364         if (WCC->HBuf == NULL)
1365                 WCC->HBuf = NewStrBuf();
1366         FlushStrBuf(WCC->HBuf);
1367
1368         WCC->upload_length = 0;
1369         WCC->upload = NULL;
1370         WCC->is_mobile = 0;
1371
1372         /** Figure out the action */
1373         index[0] = action;
1374         sizes[0] = sizeof action;
1375         for (a=1; a<9; a++)
1376         {
1377                 index[a] = arg[a-1];
1378                 sizes[a] = sizeof arg[a-1];
1379         }
1380 ////    index[9] = &foo; todo
1381         nBackDots = 0;
1382         nEmpty = 0;
1383         for ( a = 0; a < 9; ++a)
1384         {
1385                 extract_token(index[a], ChrPtr(ReqLine), a + 1, '/', sizes[a]);
1386                 if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
1387                 if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
1388                 if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
1389                 if ((index[a][0] == '.') && (index[a][1] == '.'))
1390                         nBackDots++;
1391                 if (index[a][0] == '\0')
1392                         nEmpty++;
1393         }
1394
1395
1396         if (GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
1397             (vLine != NULL)){
1398                 cookie_to_stuff((StrBuf *)vLine, NULL,
1399                                 c_username, sizeof c_username,
1400                                 c_password, sizeof c_password,
1401                                 c_roomname, sizeof c_roomname);
1402         }
1403         if (GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
1404             (vLine!=NULL)) {
1405                 CtdlDecodeBase64(c_httpauth_string, ChrPtr((StrBuf*)vLine), StrLength((StrBuf*)vLine));
1406                 extract_token(c_httpauth_user, c_httpauth_string, 0, ':', sizeof c_httpauth_user);
1407                 extract_token(c_httpauth_pass, c_httpauth_string, 1, ':', sizeof c_httpauth_pass);
1408         }
1409         if (GetHash(HTTPHeaders, HKEY("CONTENT-LENGTH"), &vLine) &&
1410             (vLine!=NULL)) {
1411                 ContentLength = StrToi((StrBuf*)vLine);
1412         }
1413         if (GetHash(HTTPHeaders, HKEY("CONTENT-TYPE"), &vLine) &&
1414             (vLine!=NULL)) {
1415                 ContentType = (StrBuf*)vLine;
1416         }
1417         if (GetHash(HTTPHeaders, HKEY("USER-AGENT"), &vLine) &&
1418             (vLine!=NULL)) {
1419                 safestrncpy(user_agent, ChrPtr((StrBuf*)vLine), sizeof user_agent);
1420 #ifdef TECH_PREVIEW
1421                 if ((WCC->is_mobile < 0) && is_mobile_ua(&buf[12])) {
1422                         WCC->is_mobile = 1;
1423                 }
1424                 else {
1425                         WCC->is_mobile = 0;
1426                 }
1427 #endif
1428         }
1429         if ((follow_xff) &&
1430             GetHash(HTTPHeaders, HKEY("X-FORWARDED-HOST"), &vLine) &&
1431             (vLine != NULL)) {
1432                 safestrncpy(WCC->http_host,
1433                             ChrPtr((StrBuf*)vLine),
1434                             sizeof WCC->http_host);
1435         }
1436         if (IsEmptyStr(WCC->http_host) &&
1437             GetHash(HTTPHeaders, HKEY("HOST"), &vLine) &&
1438             (vLine!=NULL)) {
1439                 safestrncpy(WCC->http_host,
1440                             ChrPtr((StrBuf*)vLine),
1441                             sizeof WCC->http_host);
1442
1443         }
1444         if (GetHash(HTTPHeaders, HKEY("X-FORWARDED-FOR"), &vLine) &&
1445             (vLine!=NULL)) {
1446                 safestrncpy(browser_host,
1447                             ChrPtr((StrBuf*) vLine),
1448                             sizeof browser_host);
1449                 while (num_tokens(browser_host, ',') > 1) {
1450                         remove_token(browser_host, 0, ',');
1451                 }
1452                 striplt(browser_host);
1453         }
1454
1455         if (ContentLength > 0) {
1456                 content = NewStrBuf();
1457                 StrBufPrintf(content, "Content-type: %s\n"
1458                          "Content-length: %d\n\n",
1459                          ChrPtr(ContentType), ContentLength);
1460 /*
1461                 hprintf("Content-type: %s\n"
1462                         "Content-length: %d\n\n",
1463                         ContentType, ContentLength);
1464 */
1465                 body_start = StrLength(content);
1466
1467                 /** Read the entire input data at once. */
1468                 client_read(&WCC->http_sock, content, ReadBuf, ContentLength + body_start);
1469
1470                 if (!strncasecmp(ChrPtr(ContentType), "application/x-www-form-urlencoded", 33)) {
1471                         StrBufCutLeft(content, body_start);
1472                         ParseURLParams(content);
1473                 } else if (!strncasecmp(ChrPtr(ContentType), "multipart", 9)) {
1474                         content_end = ChrPtr(content) + ContentLength + body_start;
1475                         mime_parser(ChrPtr(content), content_end, *upload_handler, NULL, NULL, NULL, 0);
1476                 }
1477         } else {
1478                 content = NULL;
1479         }
1480
1481         /* make a note of where we are in case the user wants to save it */
1482         safestrncpy(WCC->this_page, ChrPtr(ReqLine), sizeof(WCC->this_page));
1483         remove_token(WCC->this_page, 2, ' ');
1484         remove_token(WCC->this_page, 0, ' ');
1485
1486         /* If there are variables in the URL, we must grab them now */
1487         UrlLine = NewStrBufDup(ReqLine);
1488         len = StrLength(UrlLine);
1489         pch = pchs = ChrPtr(UrlLine);
1490         pche = pchs + len;
1491         while (pch < pche) {
1492                 if ((*pch == '?') || (*pch == '&')) {
1493                         StrBufCutLeft(UrlLine, pch - pchs + 1);
1494                         ParseURLParams(UrlLine);
1495                         break;
1496                 }
1497                 pch ++;
1498         }
1499         FreeStrBuf(&UrlLine);
1500
1501         /* If it's a "force 404" situation then display the error and bail. */
1502         if (!strcmp(action, "404")) {
1503                 hprintf("HTTP/1.1 404 Not found\r\n");
1504                 hprintf("Content-Type: text/plain\r\n");
1505                 wprintf("Not found\r\n");
1506                 end_burst();
1507                 goto SKIP_ALL_THIS_CRAP;
1508         }
1509
1510         /* Static content can be sent without connecting to Citadel. */
1511         is_static = 0;
1512         for (a=0; a<ndirs && ! is_static; ++a) {
1513                 if (!strcasecmp(action, (char*)static_content_dirs[a])) { /* map web to disk location */
1514                         is_static = 1;
1515                         n_static = a;
1516                 }
1517         }
1518         if (is_static) {
1519                 if (nBackDots < 2)
1520                 {
1521                         snprintf(buf, sizeof buf, "%s/%s/%s/%s/%s/%s/%s/%s",
1522                                  static_dirs[n_static],
1523                                  index[1], index[2], index[3], index[4], index[5], index[6], index[7]);
1524                         for (a=0; a<8; ++a) {
1525                                 if (buf[strlen(buf)-1] == '/') {
1526                                         buf[strlen(buf)-1] = 0;
1527                                 }
1528                         }
1529                         for (a = 0; a < strlen(buf); ++a) {
1530                                 if (isspace(buf[a])) {
1531                                         buf[a] = 0;
1532                                 }
1533                         }
1534                         output_static(buf);
1535                 }
1536                 else
1537                 {
1538                         lprintf(9, "Suspicious request. Ignoring.");
1539                         hprintf("HTTP/1.1 404 Security check failed\r\n");
1540                         hprintf("Content-Type: text/plain\r\n");
1541                         wprintf("You have sent a malformed or invalid request.\r\n");
1542                         end_burst();
1543                 }
1544                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
1545         }
1546
1547         /* If the client sent a nonce that is incorrect, kill the request. */
1548         if (strlen(bstr("nonce")) > 0) {
1549                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
1550                         bstr("nonce"), WCC->nonce);
1551                 if (ibstr("nonce") != WCC->nonce) {
1552                         lprintf(9, "Ignoring request with mismatched nonce.\n");
1553                         hprintf("HTTP/1.1 404 Security check failed\r\n");
1554                         hprintf("Content-Type: text/plain\r\n");
1555                         wprintf("Security check failed.\r\n");
1556                         end_burst();
1557                         goto SKIP_ALL_THIS_CRAP;
1558                 }
1559         }
1560
1561         /*
1562          * If we're not connected to a Citadel server, try to hook up the
1563          * connection now.
1564          */
1565         if (!WCC->connected) {
1566                 if (!strcasecmp(ctdlhost, "uds")) {
1567                         /* unix domain socket */
1568                         snprintf(buf, SIZ, "%s/citadel.socket", ctdlport);
1569                         WCC->serv_sock = uds_connectsock(buf);
1570                 }
1571                 else {
1572                         /* tcp socket */
1573                         WCC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
1574                 }
1575
1576                 if (WCC->serv_sock < 0) {
1577                         do_logout();
1578                         goto SKIP_ALL_THIS_CRAP;
1579                 }
1580                 else {
1581                         WCC->connected = 1;
1582                         serv_getln(buf, sizeof buf);    /** get the server welcome message */
1583
1584                         /**
1585                          * From what host is our user connecting?  Go with
1586                          * the host at the other end of the HTTP socket,
1587                          * unless we are following X-Forwarded-For: headers
1588                          * and such a header has already turned up something.
1589                          */
1590                         if ( (!follow_xff) || (strlen(browser_host) == 0) ) {
1591                                 locate_host(browser_host, WCC->http_sock);
1592                         }
1593
1594                         get_serv_info(browser_host, user_agent);
1595                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
1596                                 wprintf(_("You are connected to a Citadel "
1597                                         "server running Citadel %d.%02d. \n"
1598                                         "In order to run this version of WebCit "
1599                                         "you must also have Citadel %d.%02d or"
1600                                         " newer.\n\n\n"),
1601                                                 serv_info.serv_rev_level / 100,
1602                                                 serv_info.serv_rev_level % 100,
1603                                                 MINIMUM_CIT_VERSION / 100,
1604                                                 MINIMUM_CIT_VERSION % 100
1605                                         );
1606                                 end_webcit_session();
1607                                 goto SKIP_ALL_THIS_CRAP;
1608                         }
1609                 }
1610         }
1611 ////////todo: restore language in this case
1612         /*
1613          * Functions which can be performed without logging in
1614          */
1615         if (!strcasecmp(action, "listsub")) {
1616                 do_listsub();
1617                 goto SKIP_ALL_THIS_CRAP;
1618         }
1619         if (!strcasecmp(action, "freebusy")) {
1620                 do_freebusy(ChrPtr(ReqLine));
1621                 goto SKIP_ALL_THIS_CRAP;
1622         }
1623
1624         /*
1625          * If we're not logged in, but we have HTTP Authentication data,
1626          * try logging in to Citadel using that.
1627          */
1628         if ((!WCC->logged_in)
1629            && (strlen(c_httpauth_user) > 0)
1630            && (strlen(c_httpauth_pass) > 0)) {
1631                 serv_printf("USER %s", c_httpauth_user);
1632                 serv_getln(buf, sizeof buf);
1633                 if (buf[0] == '3') {
1634                         serv_printf("PASS %s", c_httpauth_pass);
1635                         serv_getln(buf, sizeof buf);
1636                         if (buf[0] == '2') {
1637                                 become_logged_in(c_httpauth_user,
1638                                                 c_httpauth_pass, buf);
1639                                 safestrncpy(WCC->httpauth_user, c_httpauth_user, sizeof WCC->httpauth_user);
1640                                 safestrncpy(WCC->httpauth_pass, c_httpauth_pass, sizeof WCC->httpauth_pass);
1641                         } else {
1642                                 /* Should only display when password is wrong */
1643                                 authorization_required(&buf[4]);
1644                                 goto SKIP_ALL_THIS_CRAP;
1645                         }
1646                 }
1647         }
1648
1649         /* This needs to run early */
1650 #ifdef TECH_PREVIEW
1651         if (!strcasecmp(action, "rss")) {
1652                 display_rss(bstr("room"), request_method);
1653                 goto SKIP_ALL_THIS_CRAP;
1654         }
1655 #endif
1656
1657         /*
1658          * The GroupDAV stuff relies on HTTP authentication instead of
1659          * our session's authentication.
1660          */
1661         if (!strncasecmp(action, "groupdav", 8)) {
1662                 groupdav_main(HTTPHeaders,
1663                               ReqLine, request_method,
1664                               ContentType, /* do GroupDAV methods */
1665                               ContentLength, content, body_start);
1666                 if (!WCC->logged_in) {
1667                         WCC->killthis = 1;      /* If not logged in, don't */
1668                 }                               /* keep the session active */
1669                 goto SKIP_ALL_THIS_CRAP;
1670         }
1671
1672
1673         /*
1674          * Automatically send requests with any method other than GET or
1675          * POST to the GroupDAV code as well.
1676          */
1677         if ((strcasecmp(ChrPtr(request_method), "GET")) && (strcasecmp(ChrPtr(request_method), "POST"))) {
1678                 groupdav_main(HTTPHeaders, ReqLine,
1679                               request_method, ContentType, /** do GroupDAV methods */
1680                               ContentLength, content, body_start);
1681                 if (!WCC->logged_in) {
1682                         WCC->killthis = 1;      /** If not logged in, don't */
1683                 }                               /** keep the session active */
1684                 goto SKIP_ALL_THIS_CRAP;
1685         }
1686
1687         /*
1688          * If we're not logged in, but we have username and password cookies
1689          * supplied by the browser, try using them to log in.
1690          */
1691         if ((!WCC->logged_in)
1692            && (!IsEmptyStr(c_username))
1693            && (!IsEmptyStr(c_password))) {
1694                 serv_printf("USER %s", c_username);
1695                 serv_getln(buf, sizeof buf);
1696                 if (buf[0] == '3') {
1697                         serv_printf("PASS %s", c_password);
1698                         serv_getln(buf, sizeof buf);
1699                         if (buf[0] == '2') {
1700                                 StrBuf *Lang;
1701                                 become_logged_in(c_username, c_password, buf);
1702                                 if (get_preference("language", &Lang)) {
1703                                         set_selected_language(ChrPtr(Lang));
1704                                         go_selected_language();         /* set locale */
1705                                 }
1706                         }
1707                 }
1708         }
1709         /*
1710          * If we don't have a current room, but a cookie specifying the
1711          * current room is supplied, make an effort to go there.
1712          */
1713         if ((IsEmptyStr(WCC->wc_roomname)) && (!IsEmptyStr(c_roomname))) {
1714                 serv_printf("GOTO %s", c_roomname);
1715                 serv_getln(buf, sizeof buf);
1716                 if (buf[0] == '2') {
1717                         safestrncpy(WCC->wc_roomname, c_roomname, sizeof WCC->wc_roomname);
1718                 }
1719         }
1720
1721         if (!strcasecmp(action, "image")) {
1722                 output_image();
1723         } else if (!strcasecmp(action, "display_mime_icon")) {
1724                 display_mime_icon();
1725         }
1726         else {
1727                 void *vHandler;
1728                 WebcitHandler *Handler;
1729
1730                 GetHash(HandlerHash, action, strlen(action) /* TODO*/, &vHandler),
1731                         Handler = (WebcitHandler*) vHandler;
1732                 if (Handler != NULL) {
1733                         if (!WCC->logged_in && ((Handler->Flags & ANONYMOUS) == 0)) {
1734                                 display_login(NULL);
1735                         }
1736                         else {
1737                                 if((Handler->Flags & NEED_URL)) {
1738                                         if (WCC->UrlFragment1 == NULL)
1739                                                 WCC->UrlFragment1 = NewStrBuf();
1740                                         if (WCC->UrlFragment2 == NULL)
1741                                                 WCC->UrlFragment2 = NewStrBuf();
1742                                         StrBufPrintf(WCC->UrlFragment1, "%s", index[1]);
1743                                         StrBufPrintf(WCC->UrlFragment2, "%s", index[2]);
1744                                 }
1745                                 if ((Handler->Flags & AJAX) != 0)
1746                                         begin_ajax_response();
1747                                 Handler->F();
1748                                 if ((Handler->Flags & AJAX) != 0)
1749                                         end_ajax_response();
1750                         }
1751                 }
1752         /* When all else fais, display the main menu. */
1753         else {
1754                 if (!WCC->logged_in)
1755                         display_login(NULL);
1756                 else
1757                         display_main_menu();
1758         }
1759 }
1760 SKIP_ALL_THIS_CRAP:
1761         fflush(stdout);
1762         if (content != NULL) {
1763                 FreeStrBuf(&content);
1764                 content = NULL;
1765         }
1766         free_urls();
1767         if (WCC->upload_length > 0) {
1768                 free(WCC->upload);
1769                 WCC->upload_length = 0;
1770         }
1771 }
1772
1773
1774 /*
1775  * Replacement for sleep() that uses select() in order to avoid SIGALRM
1776  */
1777 void sleeeeeeeeeep(int seconds)
1778 {
1779         struct timeval tv;
1780
1781         tv.tv_sec = seconds;
1782         tv.tv_usec = 0;
1783         select(0, NULL, NULL, NULL, &tv);
1784 }
1785
1786 void diagnostics(void)
1787 {
1788         output_headers(1, 1, 1, 0, 0, 0);
1789         wprintf("Session: %d<hr />\n", WC->wc_session);
1790         wprintf("Command: <br /><PRE>\n");
1791         StrEscPuts(WC->UrlFragment1);
1792         wprintf("<br />\n");
1793         StrEscPuts(WC->UrlFragment2);
1794         wprintf("</PRE><hr />\n");
1795         wprintf("Variables: <br /><PRE>\n");
1796         dump_vars();
1797         wprintf("</PRE><hr />\n");
1798         wDumpContent(1);
1799 }
1800
1801 void view_mimepart(void) {
1802         mimepart(ChrPtr(WC->UrlFragment1),
1803                  ChrPtr(WC->UrlFragment2),
1804                  0);
1805 }
1806
1807 void download_mimepart(void) {
1808         mimepart(ChrPtr(WC->UrlFragment1),
1809                  ChrPtr(WC->UrlFragment2),
1810                  1);
1811 }
1812
1813
1814 int ConditionalImportantMesage(WCTemplateToken *Tokens, void *Context, int ContextType)
1815 {
1816         struct wcsession *WCC = WC;
1817         if (WCC != NULL)
1818                 return (!IsEmptyStr(WCC->ImportantMessage));
1819         else
1820                 return 0;
1821 }
1822
1823 void tmplput_importantmessage(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
1824 {
1825         struct wcsession *WCC = WC;
1826
1827         if (WCC != NULL) {
1828                 StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
1829                         WCC->ImportantMessage[0] = '\0';
1830         }
1831 }
1832
1833 int ConditionalBstr(WCTemplateToken *Tokens, void *Context, int ContextType)
1834 {
1835         if(Tokens->nParameters == 1)
1836                 return HaveBstr(Tokens->Params[0]->Start,
1837                                 Tokens->Params[0]->len);
1838         else
1839                 return strcmp(Bstr(Tokens->Params[0]->Start,
1840                                    Tokens->Params[0]->len),
1841                               Tokens->Params[1]->Start) == 0;
1842 }
1843
1844 void tmplput_bstr(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
1845 {
1846         StrBufAppendBuf(Target,
1847                         SBstr(Tokens->Params[0]->Start,
1848                               Tokens->Params[0]->len), 0);
1849 }
1850
1851 void
1852 InitModule_WEBCIT
1853 (void)
1854 {
1855         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS);
1856         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
1857         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX);
1858         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
1859         WebcitAddUrlHandler(HKEY("change_start_page"), change_start_page, 0);
1860         WebcitAddUrlHandler(HKEY("toggle_self_service"), toggle_self_service, 0);
1861         WebcitAddUrlHandler(HKEY("vcardphoto"), display_vcard_photo_img, NEED_URL);
1862         WebcitAddUrlHandler(HKEY("mimepart"), view_mimepart, NEED_URL);
1863         WebcitAddUrlHandler(HKEY("mimepart_download"), download_mimepart, NEED_URL);
1864         WebcitAddUrlHandler(HKEY("diagnostics"), diagnostics, NEED_URL);
1865
1866         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
1867         RegisterConditional(HKEY("COND:BSTR"), 1, ConditionalBstr, CTX_NONE);
1868         RegisterNamespace("BSTR", 1, 2, tmplput_bstr, CTX_NONE);
1869         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
1870         RegisterNamespace("OFFERSTARTPAGE", 0, 0, offer_start_page, CTX_NONE);
1871 }