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 (WCC->urlstrings, 0);
 175         while (GetNextHashPos(WCC->urlstrings, Cursor, &HKLen, &HKey, &U)) {
 176                 u = (urlcontent*) U;
 177                 wprintf("%38s = %s\n", u->url_key, ChrPtr(u->url_data));
 178         }
 179 }
 180
 181 /*
 182  * Return the value of a variable supplied to the current web page (from the url or a form)
 183  */
 184
 185 const char *XBstr(const char *key, size_t keylen, size_t *len)
 186 {
 187         void *U;
 188
 189         if ((WC->urlstrings != NULL) &&
 190             GetHash(WC->urlstrings, key, keylen, &U)) {
 191                 *len = StrLength(((urlcontent *)U)->url_data);
 192                 return ChrPtr(((urlcontent *)U)->url_data);
 193         }
 194         else {
 195                 *len = 0;
 196                 return ("");
 197         }
 198 }
 199
 200 const char *XBSTR(const char *key, size_t *len)
 201 {
 202         void *U;
 203
 204         if ((WC->urlstrings != NULL) &&
 205             GetHash(WC->urlstrings, key, strlen (key), &U)){
 206                 *len = StrLength(((urlcontent *)U)->url_data);
 207                 return ChrPtr(((urlcontent *)U)->url_data);
 208         }
 209         else {
 210                 *len = 0;
 211                 return ("");
 212         }
 213 }
 214
 215
 216 const char *BSTR(const char *key)
 217 {
 218         void *U;
 219
 220         if ((WC->urlstrings != NULL) &&
 221             GetHash(WC->urlstrings, key, strlen (key), &U))
 222                 return ChrPtr(((urlcontent *)U)->url_data);
 223         else
 224                 return ("");
 225 }
 226
 227 const char *Bstr(const char *key, size_t keylen)
 228 {
 229         void *U;
 230
 231         if ((WC->urlstrings != NULL) &&
 232             GetHash(WC->urlstrings, key, keylen, &U))
 233                 return ChrPtr(((urlcontent *)U)->url_data);
 234         else
 235                 return ("");
 236 }
 237
 238 const StrBuf *SBSTR(const char *key)
 239 {
 240         void *U;
 241
 242         if ((WC->urlstrings != NULL) &&
 243             GetHash(WC->urlstrings, key, strlen (key), &U))
 244                 return ((urlcontent *)U)->url_data;
 245         else
 246                 return NULL;
 247 }
 248
 249 const StrBuf *SBstr(const char *key, size_t keylen)
 250 {
 251         void *U;
 252
 253         if ((WC->urlstrings != NULL) &&
 254             GetHash(WC->urlstrings, key, keylen, &U))
 255                 return ((urlcontent *)U)->url_data;
 256         else
 257                 return NULL;
 258 }
 259
 260 long LBstr(const char *key, size_t keylen)
 261 {
 262         void *U;
 263
 264         if ((WC->urlstrings != NULL) &&
 265             GetHash(WC->urlstrings, key, keylen, &U))
 266                 return StrTol(((urlcontent *)U)->url_data);
 267         else
 268                 return (0);
 269 }
 270
 271 long LBSTR(const char *key)
 272 {
 273         void *U;
 274
 275         if ((WC->urlstrings != NULL) &&
 276             GetHash(WC->urlstrings, key, strlen(key), &U))
 277                 return StrTol(((urlcontent *)U)->url_data);
 278         else
 279                 return (0);
 280 }
 281
 282 int IBstr(const char *key, size_t keylen)
 283 {
 284         void *U;
 285
 286         if ((WC->urlstrings != NULL) &&
 287             GetHash(WC->urlstrings, key, keylen, &U))
 288                 return StrTol(((urlcontent *)U)->url_data);
 289         else
 290                 return (0);
 291 }
 292
 293 int IBSTR(const char *key)
 294 {
 295         void *U;
 296
 297         if ((WC->urlstrings != NULL) &&
 298             GetHash(WC->urlstrings, key, strlen(key), &U))
 299                 return StrToi(((urlcontent *)U)->url_data);
 300         else
 301                 return (0);
 302 }
 303
 304 int HaveBstr(const char *key, size_t keylen)
 305 {
 306         void *U;
 307
 308         if ((WC->urlstrings != NULL) &&
 309             GetHash(WC->urlstrings, key, keylen, &U))
 310                 return (StrLength(((urlcontent *)U)->url_data) != 0);
 311         else
 312                 return (0);
 313 }
 314
 315 int HAVEBSTR(const char *key)
 316 {
 317         void *U;
 318
 319         if ((WC->urlstrings != NULL) &&
 320             GetHash(WC->urlstrings, key, strlen(key), &U))
 321                 return (StrLength(((urlcontent *)U)->url_data) != 0);
 322         else
 323                 return (0);
 324 }
 325
 326
 327 int YesBstr(const char *key, size_t keylen)
 328 {
 329         void *U;
 330
 331         if ((WC->urlstrings != NULL) &&
 332             GetHash(WC->urlstrings, key, keylen, &U))
 333                 return strcmp( ChrPtr(((urlcontent *)U)->url_data), "yes") == 0;
 334         else
 335                 return (0);
 336 }
 337
 338 int YESBSTR(const char *key)
 339 {
 340         void *U;
 341
 342         if ((WC->urlstrings != NULL) &&
 343             GetHash(WC->urlstrings, key, strlen(key), &U))
 344                 return strcmp( ChrPtr(((urlcontent *)U)->url_data), "yes") == 0;
 345         else
 346                 return (0);
 347 }
 348
 349 /*
 350  * web-printing funcion. uses our vsnprintf wrapper
 351  */
 352 void wprintf(const char *format,...)
 353 {
 354         struct wcsession *WCC = WC;
 355         va_list arg_ptr;
 356
 357         if (WCC->WBuf == NULL)
 358                 WCC->WBuf = NewStrBuf();
 359
 360         va_start(arg_ptr, format);
 361         StrBufVAppendPrintf(WCC->WBuf, format, arg_ptr);
 362         va_end(arg_ptr);
 363
 364 ///     if (StrLength(WCC-WBuf) > 2048)
 365                 ///client_write(wbuf, strlen(wbuf));
 366 }
 367
 368 /*
 369  * http-header-printing funcion. uses our vsnprintf wrapper
 370  */
 371 void hprintf(const char *format,...)
 372 {
 373         struct wcsession *WCC = WC;
 374         va_list arg_ptr;
 375
 376         va_start(arg_ptr, format);
 377         StrBufVAppendPrintf(WCC->HBuf, format, arg_ptr);
 378         va_end(arg_ptr);
 379
 380 ///     if (StrLength(WCC-WBuf) > 2048)
 381                 ///client_write(wbuf, strlen(wbuf));
 382 }
 383
 384
 385 void tmplput_trailing_javascript(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *vContext, int ContextType)
 386 {
 387         struct wcsession *WCC = WC;
 388
 389         if (WCC != NULL)
 390                 StrBufAppendTemplate(Target, nArgs, Tokens, vContext, ContextType,
 391                                      WCC->trailing_javascript, 0);
 392 }
 393
 394 /*
 395  * wrap up an HTTP session, closes tags, etc.
 396  *
 397  * print_standard_html_footer should be set to:
 398  * 0            - to transmit only,
 399  * nonzero      - to append the closing tags
 400  */
 401 void wDumpContent(int print_standard_html_footer)
 402 {
 403         if (print_standard_html_footer) {
 404                 wprintf("</div> <!-- end of 'content' div -->\n");
 405                 do_template("trailing", NULL);
 406         }
 407
 408         /* If we've been saving it all up for one big output burst,
 409          * go ahead and do that now.
 410          */
 411         end_burst();
 412 }
 413
 414
 415
 416 /*
 417  * Copy a string, escaping characters which have meaning in HTML.
 418  *
 419  * target              target buffer
 420  * strbuf              source buffer
 421  * nbsp                        If nonzero, spaces are converted to non-breaking spaces.
 422  * nolinebreaks                if set, linebreaks are removed from the string.
 423  */
 424 long stresc(char *target, long tSize, char *strbuf, int nbsp, int nolinebreaks)
 425 {
 426         char *aptr, *bptr, *eptr;
 427
 428         *target = '\0';
 429         aptr = strbuf;
 430         bptr = target;
 431         eptr = target + tSize - 6; // our biggest unit to put in...
 432
 433
 434         while ((bptr < eptr) && !IsEmptyStr(aptr) ){
 435                 if (*aptr == '<') {
 436                         memcpy(bptr, "&lt;", 4);
 437                         bptr += 4;
 438                 }
 439                 else if (*aptr == '>') {
 440                         memcpy(bptr, "&gt;", 4);
 441                         bptr += 4;
 442                 }
 443                 else if (*aptr == '&') {
 444                         memcpy(bptr, "&amp;", 5);
 445                         bptr += 5;
 446                 }
 447                 else if (*aptr == '\"') {
 448                         memcpy(bptr, "&quot;", 6);
 449                         bptr += 6;
 450                 }
 451                 else if (*aptr == '\'') {
 452                         memcpy(bptr, "&#39;", 5);
 453                         bptr += 5;
 454                 }
 455                 else if (*aptr == LB) {
 456                         *bptr = '<';
 457                         bptr ++;
 458                 }
 459                 else if (*aptr == RB) {
 460                         *bptr = '>';
 461                         bptr ++;
 462                 }
 463                 else if (*aptr == QU) {
 464                         *bptr ='"';
 465                         bptr ++;
 466                 }
 467                 else if ((*aptr == 32) && (nbsp == 1)) {
 468                         memcpy(bptr, "&nbsp;", 6);
 469                         bptr += 6;
 470                 }
 471                 else if ((*aptr == '\n') && (nolinebreaks)) {
 472                         *bptr='\0';     /* nothing */
 473                 }
 474                 else if ((*aptr == '\r') && (nolinebreaks)) {
 475                         *bptr='\0';     /* nothing */
 476                 }
 477                 else{
 478                         *bptr = *aptr;
 479                         bptr++;
 480                 }
 481                 aptr ++;
 482         }
 483         *bptr = '\0';
 484         if ((bptr = eptr - 1 ) && !IsEmptyStr(aptr) )
 485                 return -1;
 486         return (bptr - target);
 487 }
 488
 489
 490 void escputs1(char *strbuf, int nbsp, int nolinebreaks)
 491 {
 492         StrEscAppend(WC->WBuf, NULL, strbuf, nbsp, nolinebreaks);
 493 }
 494
 495 void StrEscputs1(const StrBuf *strbuf, int nbsp, int nolinebreaks)
 496 {
 497         StrEscAppend(WC->WBuf, strbuf, NULL, nbsp, nolinebreaks);
 498 }
 499
 500 /*
 501  * static wrapper for ecsputs1
 502  */
 503 void escputs(char *strbuf)
 504 {
 505         escputs1(strbuf, 0, 0);
 506 }
 507
 508
 509 /*
 510  * static wrapper for ecsputs1
 511  */
 512 void StrEscPuts(const StrBuf *strbuf)
 513 {
 514         StrEscputs1(strbuf, 0, 0);
 515 }
 516
 517
 518 /*
 519  * urlescape buffer and print it to the client
 520  */
 521 void urlescputs(const char *strbuf)
 522 {
 523         StrBufUrlescAppend(WC->WBuf, NULL, strbuf);
 524 }
 525
 526 /*
 527  * urlescape buffer and print it to the client
 528  */
 529 void UrlescPutStrBuf(const StrBuf *strbuf)
 530 {
 531         StrBufUrlescAppend(WC->WBuf, strbuf, NULL);
 532 }
 533
 534 /**
 535  * urlescape buffer and print it as header
 536  */
 537 void hurlescputs(const char *strbuf)
 538 {
 539         StrBufUrlescAppend(WC->HBuf, NULL, strbuf);
 540 }
 541
 542
 543 /*
 544  * Copy a string, escaping characters for JavaScript strings.
 545  */
 546 void jsesc(char *target, size_t tlen, char *strbuf)
 547 {
 548         int len;
 549         char *tend;
 550         char *send;
 551         char *tptr;
 552         char *sptr;
 553
 554         target[0]='\0';
 555         len = strlen (strbuf);
 556         send = strbuf + len;
 557         tend = target + tlen;
 558         sptr = strbuf;
 559         tptr = target;
 560
 561         while (!IsEmptyStr(sptr) &&
 562                (sptr < send) &&
 563                (tptr < tend)) {
 564
 565                 if (*sptr == '<')
 566                         *tptr = '[';
 567                 else if (*sptr == '>')
 568                         *tptr = ']';
 569                 else if (*sptr == '\'') {
 570                         if (tend - tptr < 3)
 571                                 return;
 572                         *(tptr++) = '\\';
 573                         *tptr = '\'';
 574                 }
 575                 else if (*sptr == '"') {
 576                         if (tend - tptr < 8)
 577                                 return;
 578                         *(tptr++) = '&';
 579                         *(tptr++) = 'q';
 580                         *(tptr++) = 'u';
 581                         *(tptr++) = 'o';
 582                         *(tptr++) = 't';
 583                         *tptr = ';';
 584                 }
 585                 else if (*sptr == '&') {
 586                         if (tend - tptr < 7)
 587                                 return;
 588                         *(tptr++) = '&';
 589                         *(tptr++) = 'a';
 590                         *(tptr++) = 'm';
 591                         *(tptr++) = 'p';
 592                         *tptr = ';';
 593                 } else {
 594                         *tptr = *sptr;
 595                 }
 596                 tptr++; sptr++;
 597         }
 598         *tptr = '\0';
 599 }
 600
 601 /*
 602  * escape and print javascript
 603  */
 604 void jsescputs(char *strbuf)
 605 {
 606         char outbuf[SIZ];
 607
 608         jsesc(outbuf, SIZ, strbuf);
 609         wprintf("%s", outbuf);
 610 }
 611
 612 /*
 613  * print a string to the client after cleaning it with msgesc() and stresc()
 614  */
 615 void msgescputs1( char *strbuf)
 616 {
 617         StrBuf *OutBuf;
 618
 619         if ((strbuf == NULL) || IsEmptyStr(strbuf))
 620                 return;
 621         OutBuf = NewStrBuf();
 622         StrMsgEscAppend(OutBuf, NULL, strbuf);
 623         StrEscAppend(WC->WBuf, OutBuf, NULL, 0, 0);
 624         FreeStrBuf(&OutBuf);
 625 }
 626
 627 /*
 628  * print a string to the client after cleaning it with msgesc()
 629  */
 630 void msgescputs(char *strbuf) {
 631         if ((strbuf != NULL) && !IsEmptyStr(strbuf))
 632                 StrMsgEscAppend(WC->WBuf, NULL, strbuf);
 633 }
 634
 635
 636
 637
 638 /*
 639  * Output HTTP headers and leading HTML for a page
 640  */
 641 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 642                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 643
 644                         int do_room_banner,     /* 0=no, 1=yes,
 645                                                  * 2 = I'm going to embed my own, so don't open the
 646                                                  *     <div id="content"> either.
 647                                                  */
 648
 649                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 650                         int suppress_check,     /* 1 = suppress check for instant messages          */
 651                         int cache               /* 1 = allow browser to cache this page             */
 652 ) {
 653         char cookie[1024];
 654         char httpnow[128];
 655
 656         hprintf("HTTP/1.1 200 OK\n");
 657         http_datestring(httpnow, sizeof httpnow, time(NULL));
 658
 659         if (do_httpheaders) {
 660                 hprintf("Content-type: text/html; charset=utf-8\r\n"
 661                         "Server: %s / %s\n"
 662                         "Connection: close\r\n",
 663                         PACKAGE_STRING, serv_info.serv_software
 664                 );
 665         }
 666
 667         if (cache) {
 668                 char httpTomorow[128];
 669
 670                 http_datestring(httpTomorow, sizeof httpTomorow,
 671                                 time(NULL) + 60 * 60 * 24 * 2);
 672
 673                 hprintf("Pragma: public\r\n"
 674                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 675                         "Last-modified: %s\r\n"
 676                         "Expires: %s\r\n",
 677                         httpnow,
 678                         httpTomorow
 679                 );
 680         }
 681         else {
 682                 hprintf("Pragma: no-cache\r\n"
 683                         "Cache-Control: no-store\r\n"
 684                         "Expires: -1\r\n"
 685                 );
 686         }
 687
 688         stuff_to_cookie(cookie, 1024, WC->wc_session, WC->wc_username,
 689                         WC->wc_password, WC->wc_roomname);
 690
 691         if (unset_cookies) {
 692                 hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 693         } else {
 694                 hprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 695                 if (server_cookie != NULL) {
 696                         hprintf("%s\n", server_cookie);
 697                 }
 698         }
 699
 700         if (do_htmlhead) {
 701                 begin_burst();
 702                 do_template("head", NULL);
 703         }
 704
 705         /* ICONBAR */
 706         if (do_htmlhead) {
 707                 begin_burst();
 708
 709                 /* check for ImportantMessages (these display in a div overlaying the main screen) */
 710                 if (!IsEmptyStr(WC->ImportantMessage)) {
 711                         wprintf("<div id=\"important_message\">\n"
 712                                 "<span class=\"imsg\">");
 713                         escputs(WC->ImportantMessage);
 714                         wprintf("</span><br />\n"
 715                                 "</div>\n"
 716                                 "<script type=\"text/javascript\">\n"
 717                                 "        setTimeout('hide_imsg_popup()', 5000); \n"
 718                                 "</script>\n");
 719                         WC->ImportantMessage[0] = 0;
 720                 }
 721
 722                 if ( (WC->logged_in) && (!unset_cookies) ) {
 723                         wprintf("<div id=\"iconbar\">");
 724                         do_selected_iconbar();
 725                         /** check for instant messages (these display in a new window) */
 726                         page_popup();
 727                         wprintf("</div>");
 728                 }
 729
 730                 if (do_room_banner == 1) {
 731                         wprintf("<div id=\"banner\">\n");
 732                         embed_room_banner(NULL, navbar_default);
 733                         wprintf("</div>\n");
 734                 }
 735         }
 736
 737         if (do_room_banner == 1) {
 738                 wprintf("<div id=\"content\">\n");
 739         }
 740 }
 741
 742
 743 /*
 744  * Generic function to do an HTTP redirect.  Easy and fun.
 745  */
 746 void http_redirect(const char *whichpage) {
 747         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 748         hprintf("Location: %s\r\n", whichpage);
 749         hprintf("URI: %s\r\n", whichpage);
 750         hprintf("Content-type: text/html; charset=utf-8\r\n");
 751         wprintf("<html><body>");
 752         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 753         wprintf("</body></html>\n");
 754         end_burst();
 755 }
 756
 757
 758
 759 /*
 760  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 761  */
 762 void http_transmit_thing(const char *content_type,
 763                          int is_static) {
 764
 765 #ifndef TECH_PREVIEW
 766         lprintf(9, "http_transmit_thing(%s)%s\n",
 767                 content_type,
 768                 (is_static ? " (static)" : "")
 769         );
 770 #endif
 771         output_headers(0, 0, 0, 0, 0, is_static);
 772
 773         hprintf("Content-type: %s\r\n"
 774                 "Server: %s\r\n"
 775                 "Connection: close\r\n",
 776                 content_type,
 777                 PACKAGE_STRING);
 778
 779         end_burst();
 780 }
 781
 782 /*
 783  * print menu box like used in the floor view or admin interface.
 784  * This function takes pair of strings as va_args,
 785  * Title        Title string of the box
 786  * Class        CSS Class for the box
 787  * nLines       How many string pairs should we print? (URL, UrlText)
 788  * ...          Pairs of URL Strings and their Names
 789  */
 790 void print_menu_box(char* Title, char *Class, int nLines, ...)
 791 {
 792         va_list arg_list;
 793         long i;
 794
 795         svput("BOXTITLE", WCS_STRING, Title);
 796         do_template("beginboxx", NULL);
 797
 798         wprintf("<ul class=\"%s\">", Class);
 799
 800         va_start(arg_list, nLines);
 801         for (i = 0; i < nLines; ++i)
 802         {
 803                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 804                 wprintf((char *) va_arg(arg_list, char *));
 805                 wprintf("</a></li>\n");
 806         }
 807         va_end (arg_list);
 808
 809         wprintf("</a></li>\n");
 810
 811         wprintf("</ul>");
 812
 813         do_template("endbox", NULL);
 814 }
 815
 816
 817 /*
 818  * dump out static pages from disk
 819  */
 820 void output_static(char *what)
 821 {
 822         int fd;
 823         struct stat statbuf;
 824         off_t bytes;
 825         off_t count = 0;
 826         const char *content_type;
 827         int len;
 828         const char *Err;
 829
 830         fd = open(what, O_RDONLY);
 831         if (fd <= 0) {
 832                 lprintf(9, "output_static('%s')  -- NOT FOUND --\n", what);
 833                 hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 834                 hprintf("Content-Type: text/plain\r\n");
 835                 wprintf("Cannot open %s: %s\r\n", what, strerror(errno));
 836                 end_burst();
 837         } else {
 838                 len = strlen (what);
 839                 content_type = GuessMimeByFilename(what, len);
 840
 841                 if (fstat(fd, &statbuf) == -1) {
 842                         lprintf(9, "output_static('%s')  -- FSTAT FAILED --\n", what);
 843                         hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 844                         hprintf("Content-Type: text/plain\r\n");
 845                         wprintf("Cannot fstat %s: %s\n", what, strerror(errno));
 846                         end_burst();
 847                         return;
 848                 }
 849
 850                 count = 0;
 851                 bytes = statbuf.st_size;
 852
 853                 if (StrBufReadBLOB(WC->WBuf, &fd, 1, bytes, &Err) < 0)
 854                 {
 855                         if (fd > 0) close(fd);
 856                         lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) --\n", what, strerror(errno));
 857                                 hprintf("HTTP/1.1 500 internal server error \r\n");
 858                                 hprintf("Content-Type: text/plain\r\n");
 859                                 end_burst();
 860                                 return;
 861                 }
 862
 863
 864                 close(fd);
 865 #ifndef TECH_PREVIEW
 866                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
 867 #endif
 868                 http_transmit_thing(content_type, 1);
 869         }
 870         if (yesbstr("force_close_session")) {
 871                 end_webcit_session();
 872         }
 873 }
 874
 875 /*
 876  * When the browser requests an image file from the Citadel server,
 877  * this function is called to transmit it.
 878  */
 879 void output_image()
 880 {
 881         struct wcsession *WCC = WC;
 882         char buf[SIZ];
 883         off_t bytes;
 884         const char *MimeType;
 885
 886         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 887         serv_getln(buf, sizeof buf);
 888         if (buf[0] == '2') {
 889                 bytes = extract_long(&buf[4], 0);
 890
 891                 /** Read it from the server */
 892
 893                 if (read_server_binary(WCC->WBuf, bytes) > 0) {
 894                         serv_puts("CLOS");
 895                         serv_getln(buf, sizeof buf);
 896
 897                         MimeType = GuessMimeType (ChrPtr(WCC->WBuf), StrLength(WCC->WBuf));
 898                         /** Write it to the browser */
 899                         if (!IsEmptyStr(MimeType))
 900                         {
 901                                 http_transmit_thing(MimeType, 0);
 902                                 return;
 903                         }
 904                 }
 905                 /* hm... unknown mimetype? fallback to blank gif */
 906         }
 907
 908
 909         /*
 910          * Instead of an ugly 404, send a 1x1 transparent GIF
 911          * when there's no such image on the server.
 912          */
 913         char blank_gif[SIZ];
 914         snprintf (blank_gif, SIZ, "%s%s", static_dirs[0], "/blank.gif");
 915         output_static(blank_gif);
 916 }
 917
 918 /*
 919  * Extract an embedded photo from a vCard for display on the client
 920  */
 921 void display_vcard_photo_img(void)
 922 {
 923         long msgnum = 0L;
 924         char *vcard;
 925         struct vCard *v;
 926         char *photosrc;
 927         const char *contentType;
 928         struct wcsession *WCC = WC;
 929
 930         msgnum = StrTol(WCC->UrlFragment1);
 931
 932         vcard = load_mimepart(msgnum,"1");
 933         v = vcard_load(vcard);
 934
 935         photosrc = vcard_get_prop(v, "PHOTO", 1,0,0);
 936         FlushStrBuf(WCC->WBuf);
 937         StrBufAppendBufPlain(WCC->WBuf, photosrc, -1, 0);
 938         if (StrBufDecodeBase64(WCC->WBuf) <= 0) {
 939                 FlushStrBuf(WCC->WBuf);
 940
 941                 hprintf("HTTP/1.1 500 %s\n","Unable to get photo");
 942                 output_headers(0, 0, 0, 0, 0, 0);
 943                 hprintf("Content-Type: text/plain\r\n");
 944                 wprintf(_("Could Not decode vcard photo\n"));
 945                 end_burst();
 946                 return;
 947         }
 948         contentType = GuessMimeType(ChrPtr(WCC->WBuf), StrLength(WCC->WBuf));
 949         http_transmit_thing(contentType, 0);
 950         free(v);
 951         free(photosrc);
 952 }
 953
 954 /*
 955  * Generic function to output an arbitrary MIME attachment from
 956  * message being composed
 957  *
 958  * partnum              The MIME part to be output
 959  * filename             Fake filename to give
 960  * force_download       Nonzero to force set the Content-Type: header to "application/octet-stream"
 961  */
 962 void postpart(StrBuf *partnum, StrBuf *filename, int force_download)
 963 {
 964         void *vPart;
 965         char content_type[256];
 966         wc_attachment *part;
 967
 968         if (GetHash(WC->attachments, SKEY(partnum), &vPart) &&
 969             (vPart != NULL)) {
 970                 part = (wc_attachment*) vPart;
 971                 if (force_download) {
 972                         strcpy(content_type, "application/octet-stream");
 973                 }
 974                 else {
 975                         strncpy(content_type, ChrPtr(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", ChrPtr(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"),
 985                         ChrPtr(partnum), ChrPtr(filename));
 986                 end_burst();
 987         }
 988 }
 989
 990
 991 /*
 992  * Generic function to output an arbitrary MIME part from an arbitrary
 993  * message number on the server.
 994  *
 995  * msgnum               Number of the item on the citadel server
 996  * partnum              The MIME part to be output
 997  * force_download       Nonzero to force set the Content-Type: header to "application/octet-stream"
 998  */
 999 void mimepart(const char *msgnum, const char *partnum, int force_download)
1000 {
1001         char buf[256];
1002         off_t bytes;
1003         char content_type[256];
1004
1005         serv_printf("OPNA %s|%s", msgnum, partnum);
1006         serv_getln(buf, sizeof buf);
1007         if (buf[0] == '2') {
1008                 bytes = extract_long(&buf[4], 0);
1009                 if (force_download) {
1010                         strcpy(content_type, "application/octet-stream");
1011                 }
1012                 else {
1013                         extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
1014                 }
1015                 output_headers(0, 0, 0, 0, 0, 0);
1016
1017                 read_server_binary(WC->WBuf, bytes);
1018                 serv_puts("CLOS");
1019                 serv_getln(buf, sizeof buf);
1020                 http_transmit_thing(content_type, 0);
1021         } else {
1022                 hprintf("HTTP/1.1 404 %s\n", &buf[4]);
1023                 output_headers(0, 0, 0, 0, 0, 0);
1024                 hprintf("Content-Type: text/plain\r\n");
1025                 wprintf(_("An error occurred while retrieving this part: %s\n"), &buf[4]);
1026                 end_burst();
1027         }
1028 }
1029
1030
1031 /*
1032  * Read any MIME part of a message, from the server, into memory.
1033  */
1034 char *load_mimepart(long msgnum, char *partnum)
1035 {
1036         char buf[SIZ];
1037         off_t bytes;
1038         char content_type[SIZ];
1039         char *content;
1040
1041         serv_printf("DLAT %ld|%s", msgnum, partnum);
1042         serv_getln(buf, sizeof buf);
1043         if (buf[0] == '6') {
1044                 bytes = extract_long(&buf[4], 0);
1045                 extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
1046
1047                 content = malloc(bytes + 2);
1048                 serv_read(content, bytes);
1049
1050                 content[bytes] = 0;     /* null terminate for good measure */
1051                 return(content);
1052         }
1053         else {
1054                 return(NULL);
1055         }
1056 }
1057
1058 /*
1059  * Read any MIME part of a message, from the server, into memory.
1060  */
1061 void MimeLoadData(wc_mime_attachment *Mime)
1062 {
1063         char buf[SIZ];
1064         off_t bytes;
1065 //// TODO: is there a chance the contenttype is different  to the one we know?
1066         serv_printf("DLAT %ld|%s", Mime->msgnum, ChrPtr(Mime->PartNum));
1067         serv_getln(buf, sizeof buf);
1068         if (buf[0] == '6') {
1069                 bytes = extract_long(&buf[4], 0);
1070
1071                 if (Mime->Data == NULL)
1072                         Mime->Data = NewStrBufPlain(NULL, bytes);
1073                 StrBuf_ServGetBLOB(Mime->Data, bytes);
1074
1075         }
1076         else {
1077                 FlushStrBuf(Mime->Data);
1078                 /// TODO XImportant message
1079         }
1080 }
1081
1082
1083 /*
1084  * Convenience functions to display a page containing only a string
1085  *
1086  * titlebarcolor        color of the titlebar of the frame
1087  * titlebarmsg          text to display in the title bar
1088  * messagetext          body of the box
1089  */
1090 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
1091 {
1092         hprintf("HTTP/1.1 200 OK\n");
1093         output_headers(1, 1, 2, 0, 0, 0);
1094         wprintf("<div id=\"banner\">\n");
1095         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
1096         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
1097         wprintf("</td></tr></table>\n");
1098         wprintf("</div>\n<div id=\"content\">\n");
1099         escputs(messagetext);
1100
1101         wprintf("<hr />\n");
1102         wDumpContent(1);
1103 }
1104
1105
1106 /*
1107  * Display a blank page.
1108  */
1109 void blank_page(void) {
1110         output_headers(1, 1, 0, 0, 0, 0);
1111         wDumpContent(2);
1112 }
1113
1114
1115 /*
1116  * A template has been requested
1117  */
1118 void url_do_template(void) {
1119         const StrBuf *Tmpl = sbstr("template");
1120         begin_burst();
1121         output_headers(1, 0, 0, 0, 1, 0);
1122         DoTemplate(ChrPtr(Tmpl), StrLength(Tmpl), NULL, NULL, 0);
1123         end_burst();
1124 }
1125
1126
1127
1128 /*
1129  * Offer to make any page the user's "start page."
1130  */
1131 void offer_start_page(StrBuf *Target, int nArgs, WCTemplateToken *Token, void *Context, int ContextType) {
1132         wprintf("<a href=\"change_start_page?startpage=");
1133         urlescputs(WC->this_page);
1134         wprintf("\">");
1135         wprintf(_("Make this my start page"));
1136         wprintf("</a>");
1137 #ifdef TECH_PREVIEW
1138         wprintf("<br/><a href=\"rss?room=");
1139         urlescputs(WC->wc_roomname);
1140         wprintf("\" title=\"RSS 2.0 feed for ");
1141         escputs(WC->wc_roomname);
1142         wprintf("\"><img alt=\"RSS\" border=\"0\" src=\"static/xml_button.gif\"/></a>\n");
1143 #endif
1144 }
1145
1146
1147 /*
1148  * Change the user's start page
1149  */
1150 void change_start_page(void) {
1151
1152         if (bstr("startpage") == NULL) {
1153                 safestrncpy(WC->ImportantMessage,
1154                         _("You no longer have a start page selected."),
1155                         sizeof WC->ImportantMessage);
1156                 display_main_menu();
1157                 return;
1158         }
1159
1160         set_preference("startpage", NewStrBufPlain(bstr("startpage"), -1), 1);
1161
1162         output_headers(1, 1, 0, 0, 0, 0);
1163         do_template("newstartpage", NULL);
1164         wDumpContent(1);
1165 }
1166
1167
1168
1169 /*
1170  * convenience function to indicate success
1171  */
1172 void display_success(char *successmessage)
1173 {
1174         convenience_page("007700", "OK", successmessage);
1175 }
1176
1177
1178 /*
1179  * Authorization required page
1180  * This is probably temporary and should be revisited
1181  */
1182 void authorization_required(const char *message)
1183 {
1184         hprintf("HTTP/1.1 401 Authorization Required\r\n");
1185         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", serv_info.serv_humannode);
1186         hprintf("Content-Type: text/html\r\n");
1187         wprintf("<h1>");
1188         wprintf(_("Authorization Required"));
1189         wprintf("</h1>\r\n");
1190         wprintf(_("The resource you requested requires a valid username and password. "
1191                 "You could not be logged in: %s\n"), message);
1192         wDumpContent(0);
1193
1194 }
1195
1196 /*
1197  * This function is called by the MIME parser to handle data uploaded by
1198  * the browser.  Form data, uploaded files, and the data from HTTP PUT
1199  * operations (such as those found in GroupDAV) all arrive this way.
1200  *
1201  * name         Name of the item being uploaded
1202  * filename     Filename of the item being uploaded
1203  * partnum      MIME part identifier (not needed)
1204  * disp         MIME content disposition (not needed)
1205  * content      The actual data
1206  * cbtype       MIME content-type
1207  * cbcharset    Character set
1208  * length       Content length
1209  * encoding     MIME encoding type (not needed)
1210  * cbid         Content ID (not needed)
1211  * userdata     Not used here
1212  */
1213 void upload_handler(char *name, char *filename, char *partnum, char *disp,
1214                         void *content, char *cbtype, char *cbcharset,
1215                         size_t length, char *encoding, char *cbid, void *userdata)
1216 {
1217         urlcontent *u;
1218 #ifdef DEBUG_URLSTRINGS
1219         lprintf(9, "upload_handler() name=%s, type=%s, len=%d\n", name, cbtype, length);
1220 #endif
1221         if (WC->urlstrings == NULL)
1222                 WC->urlstrings = NewHash(1, NULL);
1223
1224         /* Form fields */
1225         if ( (length > 0) && (IsEmptyStr(cbtype)) ) {
1226                 u = (urlcontent *) malloc(sizeof(urlcontent));
1227
1228                 safestrncpy(u->url_key, name, sizeof(u->url_key));
1229                 u->url_data = NewStrBufPlain(content, length);
1230
1231                 Put(WC->urlstrings, u->url_key, strlen(u->url_key), u, free_url);
1232 #ifdef DEBUG_URLSTRINGS
1233                 lprintf(9, "Key: <%s> len: [%ld] Data: <%s>\n",
1234                         u->url_key,
1235                         StrLength(u->url_data),
1236                         ChrPtr(u->url_data));
1237 #endif
1238         }
1239
1240         /** Uploaded files */
1241         if ( (length > 0) && (!IsEmptyStr(cbtype)) ) {
1242                 WC->upload = malloc(length);
1243                 if (WC->upload != NULL) {
1244                         WC->upload_length = length;
1245                         safestrncpy(WC->upload_filename, filename,
1246                                         sizeof(WC->upload_filename));
1247                         safestrncpy(WC->upload_content_type, cbtype,
1248                                         sizeof(WC->upload_content_type));
1249                         memcpy(WC->upload, content, length);
1250                 }
1251                 else {
1252                         lprintf(3, "malloc() failed: %s\n", strerror(errno));
1253                 }
1254         }
1255
1256 }
1257
1258 /*
1259  * Convenience functions to wrap around asynchronous ajax responses
1260  */
1261 void begin_ajax_response(void) {
1262         struct wcsession *WCC = WC;
1263
1264         FlushStrBuf(WCC->HBuf);
1265         output_headers(0, 0, 0, 0, 0, 0);
1266
1267         hprintf("Content-type: text/html; charset=UTF-8\r\n"
1268                 "Server: %s\r\n"
1269                 "Connection: close\r\n"
1270                 ,
1271                 PACKAGE_STRING);
1272         begin_burst();
1273 }
1274
1275 /*
1276  * print ajax response footer
1277  */
1278 void end_ajax_response(void) {
1279         wDumpContent(0);
1280 }
1281
1282 /*
1283  * Wraps a Citadel server command in an AJAX transaction.
1284  */
1285 void ajax_servcmd(void)
1286 {
1287         char buf[1024];
1288         char gcontent[1024];
1289         char *junk;
1290         size_t len;
1291
1292         begin_ajax_response();
1293
1294         serv_printf("%s", bstr("g_cmd"));
1295         serv_getln(buf, sizeof buf);
1296         wprintf("%s\n", buf);
1297
1298         if (buf[0] == '8') {
1299                 serv_printf("\n\n000");
1300         }
1301         if ((buf[0] == '1') || (buf[0] == '8')) {
1302                 while (serv_getln(gcontent, sizeof gcontent), strcmp(gcontent, "000")) {
1303                         wprintf("%s\n", gcontent);
1304                 }
1305                 wprintf("000");
1306         }
1307         if (buf[0] == '4') {
1308                 text_to_server(bstr("g_input"));
1309                 serv_puts("000");
1310         }
1311         if (buf[0] == '6') {
1312                 len = atol(&buf[4]);
1313                 junk = malloc(len);
1314                 serv_read(junk, len);
1315                 free(junk);
1316         }
1317         if (buf[0] == '7') {
1318                 len = atol(&buf[4]);
1319                 junk = malloc(len);
1320                 memset(junk, 0, len);
1321                 serv_write(junk, len);
1322                 free(junk);
1323         }
1324
1325         end_ajax_response();
1326
1327         /*
1328          * This is kind of an ugly hack, but this is the only place it can go.
1329          * If the command was GEXP, then the instant messenger window must be
1330          * running, so reset the "last_pager_check" watchdog timer so
1331          * that page_popup() doesn't try to open it a second time.
1332          */
1333         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
1334                 WC->last_pager_check = time(NULL);
1335         }
1336 }
1337
1338
1339 /*
1340  * Helper function for the asynchronous check to see if we need
1341  * to open the instant messenger window.
1342  */
1343 void seconds_since_last_gexp(void)
1344 {
1345         char buf[256];
1346
1347         if ( (time(NULL) - WC->last_pager_check) < 30) {
1348                 wprintf("NO\n");
1349         }
1350         else {
1351                 memset(buf, 5, 0);
1352                 serv_puts("NOOP");
1353                 serv_getln(buf, sizeof buf);
1354                 if (buf[3] == '*') {
1355                         wprintf("YES");
1356                 }
1357                 else {
1358                         wprintf("NO");
1359                 }
1360         }
1361 }
1362
1363 /**
1364  * \brief Detects a 'mobile' user agent
1365  */
1366 int is_mobile_ua(char *user_agent) {
1367       if (strstr(user_agent,"iPhone OS") != NULL) {
1368         return 1;
1369       } else if (strstr(user_agent,"Windows CE") != NULL) {
1370         return 1;
1371       } else if (strstr(user_agent,"SymbianOS") != NULL) {
1372         return 1;
1373       } else if (strstr(user_agent, "Opera Mobi") != NULL) {
1374         return 1;
1375       } else if (strstr(user_agent, "Firefox/2.0.0 Opera 9.51 Beta") != NULL) {
1376                  // For some reason a new install of Opera 9.51beta decided to spoof.
1377           return 1;
1378           }
1379       return 0;
1380 }
1381
1382
1383 /*
1384  * Entry point for WebCit transaction
1385  */
1386 void session_loop(HashList *HTTPHeaders, StrBuf *ReqLine, StrBuf *request_method, StrBuf *ReadBuf)
1387 {
1388         const char *pch, *pchs, *pche;
1389         void *vLine;
1390         char action[1024];
1391         char arg[8][128];
1392         size_t sizes[10];
1393         char *index[10];
1394         char buf[SIZ];
1395         int a, nBackDots, nEmpty;
1396         int ContentLength = 0;
1397         StrBuf *ContentType = NULL;
1398         StrBuf *UrlLine = NULL;
1399         StrBuf *content = NULL;
1400         const char *content_end = NULL;
1401         char browser_host[256];
1402         char user_agent[256];
1403         int body_start = 0;
1404         int is_static = 0;
1405         int n_static = 0;
1406         int len = 0;
1407         /*
1408          * We stuff these with the values coming from the client cookies,
1409          * so we can use them to reconnect a timed out session if we have to.
1410          */
1411         char c_username[SIZ];
1412         char c_password[SIZ];
1413         char c_roomname[SIZ];
1414         char c_httpauth_string[SIZ];
1415         char c_httpauth_user[SIZ];
1416         char c_httpauth_pass[SIZ];
1417         struct wcsession *WCC;
1418
1419         safestrncpy(c_username, "", sizeof c_username);
1420         safestrncpy(c_password, "", sizeof c_password);
1421         safestrncpy(c_roomname, "", sizeof c_roomname);
1422         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
1423         safestrncpy(c_httpauth_user, DEFAULT_HTTPAUTH_USER, sizeof c_httpauth_user);
1424         safestrncpy(c_httpauth_pass, DEFAULT_HTTPAUTH_PASS, sizeof c_httpauth_pass);
1425         strcpy(browser_host, "");
1426
1427         WCC= WC;
1428         if (WCC->WBuf == NULL)
1429                 WC->WBuf = NewStrBufPlain(NULL, 32768);
1430         FlushStrBuf(WCC->WBuf);
1431
1432         if (WCC->HBuf == NULL)
1433                 WCC->HBuf = NewStrBuf();
1434         FlushStrBuf(WCC->HBuf);
1435
1436         WCC->upload_length = 0;
1437         WCC->upload = NULL;
1438         WCC->is_mobile = 0;
1439         WCC->trailing_javascript = NewStrBuf();
1440
1441         /** Figure out the action */
1442         index[0] = action;
1443         sizes[0] = sizeof action;
1444         for (a=1; a<9; a++)
1445         {
1446                 index[a] = arg[a-1];
1447                 sizes[a] = sizeof arg[a-1];
1448         }
1449 ////    index[9] = &foo; todo
1450         nBackDots = 0;
1451         nEmpty = 0;
1452         for ( a = 0; a < 9; ++a)
1453         {
1454                 extract_token(index[a], ChrPtr(ReqLine), a + 1, '/', sizes[a]);
1455                 if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
1456                 if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
1457                 if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
1458                 if ((index[a][0] == '.') && (index[a][1] == '.'))
1459                         nBackDots++;
1460                 if (index[a][0] == '\0')
1461                         nEmpty++;
1462         }
1463
1464
1465         if (GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
1466             (vLine != NULL)){
1467                 cookie_to_stuff((StrBuf *)vLine, NULL,
1468                                 c_username, sizeof c_username,
1469                                 c_password, sizeof c_password,
1470                                 c_roomname, sizeof c_roomname);
1471         }
1472         if (GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
1473             (vLine!=NULL)) {
1474                 CtdlDecodeBase64(c_httpauth_string, ChrPtr((StrBuf*)vLine), StrLength((StrBuf*)vLine));
1475                 extract_token(c_httpauth_user, c_httpauth_string, 0, ':', sizeof c_httpauth_user);
1476                 extract_token(c_httpauth_pass, c_httpauth_string, 1, ':', sizeof c_httpauth_pass);
1477         }
1478         if (GetHash(HTTPHeaders, HKEY("CONTENT-LENGTH"), &vLine) &&
1479             (vLine!=NULL)) {
1480                 ContentLength = StrToi((StrBuf*)vLine);
1481         }
1482         if (GetHash(HTTPHeaders, HKEY("CONTENT-TYPE"), &vLine) &&
1483             (vLine!=NULL)) {
1484                 ContentType = (StrBuf*)vLine;
1485         }
1486         if (GetHash(HTTPHeaders, HKEY("USER-AGENT"), &vLine) &&
1487             (vLine!=NULL)) {
1488                 safestrncpy(user_agent, ChrPtr((StrBuf*)vLine), sizeof user_agent);
1489 #ifdef TECH_PREVIEW
1490                 if ((WCC->is_mobile < 0) && is_mobile_ua(&buf[12])) {
1491                         WCC->is_mobile = 1;
1492                 }
1493                 else {
1494                         WCC->is_mobile = 0;
1495                 }
1496 #endif
1497         }
1498         if ((follow_xff) &&
1499             GetHash(HTTPHeaders, HKEY("X-FORWARDED-HOST"), &vLine) &&
1500             (vLine != NULL)) {
1501                 safestrncpy(WCC->http_host,
1502                             ChrPtr((StrBuf*)vLine),
1503                             sizeof WCC->http_host);
1504         }
1505         if (IsEmptyStr(WCC->http_host) &&
1506             GetHash(HTTPHeaders, HKEY("HOST"), &vLine) &&
1507             (vLine!=NULL)) {
1508                 safestrncpy(WCC->http_host,
1509                             ChrPtr((StrBuf*)vLine),
1510                             sizeof WCC->http_host);
1511
1512         }
1513         if (GetHash(HTTPHeaders, HKEY("X-FORWARDED-FOR"), &vLine) &&
1514             (vLine!=NULL)) {
1515                 safestrncpy(browser_host,
1516                             ChrPtr((StrBuf*) vLine),
1517                             sizeof browser_host);
1518                 while (num_tokens(browser_host, ',') > 1) {
1519                         remove_token(browser_host, 0, ',');
1520                 }
1521                 striplt(browser_host);
1522         }
1523
1524         if (ContentLength > 0) {
1525                 content = NewStrBuf();
1526                 StrBufPrintf(content, "Content-type: %s\n"
1527                          "Content-length: %d\n\n",
1528                          ChrPtr(ContentType), ContentLength);
1529 /*
1530                 hprintf("Content-type: %s\n"
1531                         "Content-length: %d\n\n",
1532                         ContentType, ContentLength);
1533 */
1534                 body_start = StrLength(content);
1535
1536                 /** Read the entire input data at once. */
1537                 client_read(&WCC->http_sock, content, ReadBuf, ContentLength + body_start);
1538
1539                 if (!strncasecmp(ChrPtr(ContentType), "application/x-www-form-urlencoded", 33)) {
1540                         StrBufCutLeft(content, body_start);
1541                         ParseURLParams(content);
1542                 } else if (!strncasecmp(ChrPtr(ContentType), "multipart", 9)) {
1543                         content_end = ChrPtr(content) + ContentLength + body_start;
1544                         mime_parser(ChrPtr(content), content_end, *upload_handler, NULL, NULL, NULL, 0);
1545                 }
1546         } else {
1547                 content = NULL;
1548         }
1549
1550         /* make a note of where we are in case the user wants to save it */
1551         safestrncpy(WCC->this_page, ChrPtr(ReqLine), sizeof(WCC->this_page));
1552         remove_token(WCC->this_page, 2, ' ');
1553         remove_token(WCC->this_page, 0, ' ');
1554
1555         /* If there are variables in the URL, we must grab them now */
1556         UrlLine = NewStrBufDup(ReqLine);
1557         len = StrLength(UrlLine);
1558         pch = pchs = ChrPtr(UrlLine);
1559         pche = pchs + len;
1560         while (pch < pche) {
1561                 if ((*pch == '?') || (*pch == '&')) {
1562                         StrBufCutLeft(UrlLine, pch - pchs + 1);
1563                         ParseURLParams(UrlLine);
1564                         break;
1565                 }
1566                 pch ++;
1567         }
1568         FreeStrBuf(&UrlLine);
1569
1570         /* If it's a "force 404" situation then display the error and bail. */
1571         if (!strcmp(action, "404")) {
1572                 hprintf("HTTP/1.1 404 Not found\r\n");
1573                 hprintf("Content-Type: text/plain\r\n");
1574                 wprintf("Not found\r\n");
1575                 end_burst();
1576                 goto SKIP_ALL_THIS_CRAP;
1577         }
1578
1579         /* Static content can be sent without connecting to Citadel. */
1580         is_static = 0;
1581         for (a=0; a<ndirs && ! is_static; ++a) {
1582                 if (!strcasecmp(action, (char*)static_content_dirs[a])) { /* map web to disk location */
1583                         is_static = 1;
1584                         n_static = a;
1585                 }
1586         }
1587         if (is_static) {
1588                 if (nBackDots < 2)
1589                 {
1590                         snprintf(buf, sizeof buf, "%s/%s/%s/%s/%s/%s/%s/%s",
1591                                  static_dirs[n_static],
1592                                  index[1], index[2], index[3], index[4], index[5], index[6], index[7]);
1593                         for (a=0; a<8; ++a) {
1594                                 if (buf[strlen(buf)-1] == '/') {
1595                                         buf[strlen(buf)-1] = 0;
1596                                 }
1597                         }
1598                         for (a = 0; a < strlen(buf); ++a) {
1599                                 if (isspace(buf[a])) {
1600                                         buf[a] = 0;
1601                                 }
1602                         }
1603                         output_static(buf);
1604                 }
1605                 else
1606                 {
1607                         lprintf(9, "Suspicious request. Ignoring.");
1608                         hprintf("HTTP/1.1 404 Security check failed\r\n");
1609                         hprintf("Content-Type: text/plain\r\n");
1610                         wprintf("You have sent a malformed or invalid request.\r\n");
1611                         end_burst();
1612                 }
1613                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
1614         }
1615
1616         /* If the client sent a nonce that is incorrect, kill the request. */
1617         if (strlen(bstr("nonce")) > 0) {
1618                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
1619                         bstr("nonce"), WCC->nonce);
1620                 if (ibstr("nonce") != WCC->nonce) {
1621                         lprintf(9, "Ignoring request with mismatched nonce.\n");
1622                         hprintf("HTTP/1.1 404 Security check failed\r\n");
1623                         hprintf("Content-Type: text/plain\r\n");
1624                         wprintf("Security check failed.\r\n");
1625                         end_burst();
1626                         goto SKIP_ALL_THIS_CRAP;
1627                 }
1628         }
1629
1630         /*
1631          * If we're not connected to a Citadel server, try to hook up the
1632          * connection now.
1633          */
1634         if (!WCC->connected) {
1635                 if (!strcasecmp(ctdlhost, "uds")) {
1636                         /* unix domain socket */
1637                         snprintf(buf, SIZ, "%s/citadel.socket", ctdlport);
1638                         WCC->serv_sock = uds_connectsock(buf);
1639                 }
1640                 else {
1641                         /* tcp socket */
1642                         WCC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
1643                 }
1644
1645                 if (WCC->serv_sock < 0) {
1646                         do_logout();
1647                         goto SKIP_ALL_THIS_CRAP;
1648                 }
1649                 else {
1650                         WCC->connected = 1;
1651                         serv_getln(buf, sizeof buf);    /** get the server welcome message */
1652
1653                         /**
1654                          * From what host is our user connecting?  Go with
1655                          * the host at the other end of the HTTP socket,
1656                          * unless we are following X-Forwarded-For: headers
1657                          * and such a header has already turned up something.
1658                          */
1659                         if ( (!follow_xff) || (strlen(browser_host) == 0) ) {
1660                                 locate_host(browser_host, WCC->http_sock);
1661                         }
1662
1663                         get_serv_info(browser_host, user_agent);
1664                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
1665                                 begin_burst();
1666                                 wprintf(_("You are connected to a Citadel "
1667                                         "server running Citadel %d.%02d. \n"
1668                                         "In order to run this version of WebCit "
1669                                         "you must also have Citadel %d.%02d or"
1670                                         " newer.\n\n\n"),
1671                                                 serv_info.serv_rev_level / 100,
1672                                                 serv_info.serv_rev_level % 100,
1673                                                 MINIMUM_CIT_VERSION / 100,
1674                                                 MINIMUM_CIT_VERSION % 100
1675                                         );
1676                                 end_burst();
1677                                 end_webcit_session();
1678                                 goto SKIP_ALL_THIS_CRAP;
1679                         }
1680                 }
1681         }
1682 ////////todo: restore language in this case
1683         /*
1684          * Functions which can be performed without logging in
1685          */
1686         if (!strcasecmp(action, "listsub")) {
1687                 do_listsub();
1688                 goto SKIP_ALL_THIS_CRAP;
1689         }
1690         if (!strcasecmp(action, "freebusy")) {
1691                 do_freebusy(ChrPtr(ReqLine));
1692                 goto SKIP_ALL_THIS_CRAP;
1693         }
1694
1695         /*
1696          * If we're not logged in, but we have HTTP Authentication data,
1697          * try logging in to Citadel using that.
1698          */
1699         if ((!WCC->logged_in)
1700            && (strlen(c_httpauth_user) > 0)
1701            && (strlen(c_httpauth_pass) > 0)) {
1702                 serv_printf("USER %s", c_httpauth_user);
1703                 serv_getln(buf, sizeof buf);
1704                 if (buf[0] == '3') {
1705                         serv_printf("PASS %s", c_httpauth_pass);
1706                         serv_getln(buf, sizeof buf);
1707                         if (buf[0] == '2') {
1708                                 become_logged_in(c_httpauth_user,
1709                                                 c_httpauth_pass, buf);
1710                                 safestrncpy(WCC->httpauth_user, c_httpauth_user, sizeof WCC->httpauth_user);
1711                                 safestrncpy(WCC->httpauth_pass, c_httpauth_pass, sizeof WCC->httpauth_pass);
1712                         } else {
1713                                 /* Should only display when password is wrong */
1714                                 authorization_required(&buf[4]);
1715                                 goto SKIP_ALL_THIS_CRAP;
1716                         }
1717                 }
1718         }
1719
1720         /* This needs to run early */
1721 #ifdef TECH_PREVIEW
1722         if (!strcasecmp(action, "rss")) {
1723                 display_rss(bstr("room"), request_method);
1724                 goto SKIP_ALL_THIS_CRAP;
1725         }
1726 #endif
1727
1728         /*
1729          * The GroupDAV stuff relies on HTTP authentication instead of
1730          * our session's authentication.
1731          */
1732         if (!strncasecmp(action, "groupdav", 8)) {
1733                 groupdav_main(HTTPHeaders,
1734                               ReqLine, request_method,
1735                               ContentType, /* do GroupDAV methods */
1736                               ContentLength, content, body_start);
1737                 if (!WCC->logged_in) {
1738                         WCC->killthis = 1;      /* If not logged in, don't */
1739                 }                               /* keep the session active */
1740                 goto SKIP_ALL_THIS_CRAP;
1741         }
1742
1743
1744         /*
1745          * Automatically send requests with any method other than GET or
1746          * POST to the GroupDAV code as well.
1747          */
1748         if ((strcasecmp(ChrPtr(request_method), "GET")) && (strcasecmp(ChrPtr(request_method), "POST"))) {
1749                 groupdav_main(HTTPHeaders, ReqLine,
1750                               request_method, ContentType, /** do GroupDAV methods */
1751                               ContentLength, content, body_start);
1752                 if (!WCC->logged_in) {
1753                         WCC->killthis = 1;      /** If not logged in, don't */
1754                 }                               /** keep the session active */
1755                 goto SKIP_ALL_THIS_CRAP;
1756         }
1757
1758         /*
1759          * If we're not logged in, but we have username and password cookies
1760          * supplied by the browser, try using them to log in.
1761          */
1762         if ((!WCC->logged_in)
1763            && (!IsEmptyStr(c_username))
1764            && (!IsEmptyStr(c_password))) {
1765                 serv_printf("USER %s", c_username);
1766                 serv_getln(buf, sizeof buf);
1767                 if (buf[0] == '3') {
1768                         serv_printf("PASS %s", c_password);
1769                         serv_getln(buf, sizeof buf);
1770                         if (buf[0] == '2') {
1771                                 StrBuf *Lang;
1772                                 become_logged_in(c_username, c_password, buf);
1773                                 if (get_preference("language", &Lang)) {
1774                                         set_selected_language(ChrPtr(Lang));
1775                                         go_selected_language();         /* set locale */
1776                                 }
1777                                 get_preference("default_header_charset", &WCC->DefaultCharset);
1778                         }
1779                 }
1780         }
1781         /*
1782          * If we don't have a current room, but a cookie specifying the
1783          * current room is supplied, make an effort to go there.
1784          */
1785         if ((IsEmptyStr(WCC->wc_roomname)) && (!IsEmptyStr(c_roomname))) {
1786                 serv_printf("GOTO %s", c_roomname);
1787                 serv_getln(buf, sizeof buf);
1788                 if (buf[0] == '2') {
1789                         safestrncpy(WCC->wc_roomname, c_roomname, sizeof WCC->wc_roomname);
1790                 }
1791         }
1792
1793         if (!strcasecmp(action, "image")) {
1794                 output_image();
1795         } else if (!strcasecmp(action, "display_mime_icon")) {
1796                 display_mime_icon();
1797         }
1798         else {
1799                 void *vHandler;
1800                 WebcitHandler *Handler;
1801
1802                 GetHash(HandlerHash, action, strlen(action) /* TODO*/, &vHandler),
1803                         Handler = (WebcitHandler*) vHandler;
1804                 if (Handler != NULL) {
1805                         if (!WCC->logged_in && ((Handler->Flags & ANONYMOUS) == 0)) {
1806                                 display_login(NULL);
1807                         }
1808                         else {
1809                                 if((Handler->Flags & NEED_URL)) {
1810                                         if (WCC->UrlFragment1 == NULL)
1811                                                 WCC->UrlFragment1 = NewStrBuf();
1812                                         if (WCC->UrlFragment2 == NULL)
1813                                                 WCC->UrlFragment2 = NewStrBuf();
1814                                         StrBufPrintf(WCC->UrlFragment1, "%s", index[0]);
1815                                         StrBufPrintf(WCC->UrlFragment2, "%s", index[1]);
1816                                 }
1817                                 if ((Handler->Flags & AJAX) != 0)
1818                                         begin_ajax_response();
1819                                 Handler->F();
1820                                 if ((Handler->Flags & AJAX) != 0)
1821                                         end_ajax_response();
1822                         }
1823                 }
1824         /* When all else fais, display the main menu. */
1825         else {
1826                 if (!WCC->logged_in)
1827                         display_login(NULL);
1828                 else
1829                         display_main_menu();
1830         }
1831 }
1832 SKIP_ALL_THIS_CRAP:
1833         fflush(stdout);
1834         if (content != NULL) {
1835                 FreeStrBuf(&content);
1836                 content = NULL;
1837         }
1838         free_urls();
1839         if (WCC->upload_length > 0) {
1840                 free(WCC->upload);
1841                 WCC->upload_length = 0;
1842         }
1843         FreeStrBuf(&WCC->trailing_javascript);
1844 }
1845
1846
1847 /*
1848  * Replacement for sleep() that uses select() in order to avoid SIGALRM
1849  */
1850 void sleeeeeeeeeep(int seconds)
1851 {
1852         struct timeval tv;
1853
1854         tv.tv_sec = seconds;
1855         tv.tv_usec = 0;
1856         select(0, NULL, NULL, NULL, &tv);
1857 }
1858
1859 void diagnostics(void)
1860 {
1861         output_headers(1, 1, 1, 0, 0, 0);
1862         wprintf("Session: %d<hr />\n", WC->wc_session);
1863         wprintf("Command: <br /><PRE>\n");
1864         StrEscPuts(WC->UrlFragment1);
1865         wprintf("<br />\n");
1866         StrEscPuts(WC->UrlFragment2);
1867         wprintf("</PRE><hr />\n");
1868         wprintf("Variables: <br /><PRE>\n");
1869         dump_vars();
1870         wprintf("</PRE><hr />\n");
1871         wDumpContent(1);
1872 }
1873
1874 void view_mimepart(void) {
1875         mimepart(ChrPtr(WC->UrlFragment1),
1876                  ChrPtr(WC->UrlFragment2),
1877                  0);
1878 }
1879
1880 void download_mimepart(void) {
1881         mimepart(ChrPtr(WC->UrlFragment1),
1882                  ChrPtr(WC->UrlFragment2),
1883                  1);
1884 }
1885
1886 void view_postpart(void) {
1887         postpart(WC->UrlFragment1,
1888                  WC->UrlFragment2,
1889                  0);
1890 }
1891
1892 void download_postpart(void) {
1893         postpart(WC->UrlFragment1,
1894                  WC->UrlFragment2,
1895                  1);
1896 }
1897
1898
1899 int ConditionalImportantMesage(WCTemplateToken *Tokens, void *Context, int ContextType)
1900 {
1901         struct wcsession *WCC = WC;
1902         if (WCC != NULL)
1903                 return (!IsEmptyStr(WCC->ImportantMessage));
1904         else
1905                 return 0;
1906 }
1907
1908 void tmplput_importantmessage(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
1909 {
1910         struct wcsession *WCC = WC;
1911
1912         if (WCC != NULL) {
1913 /*
1914                 StrBufAppendTemplate(Target, nArgs, Tokens, Context, ContextType,
1915                                      WCC->ImportantMessage, 0);
1916 */
1917                 StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
1918                 WCC->ImportantMessage[0] = '\0';
1919         }
1920 }
1921
1922 int ConditionalBstr(WCTemplateToken *Tokens, void *Context, int ContextType)
1923 {
1924         if(Tokens->nParameters == 3)
1925                 return HaveBstr(Tokens->Params[2]->Start,
1926                                 Tokens->Params[2]->len);
1927         else
1928                 return strcmp(Bstr(Tokens->Params[2]->Start,
1929                                    Tokens->Params[2]->len),
1930                               Tokens->Params[3]->Start) == 0;
1931 }
1932
1933 void tmplput_bstr(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
1934 {
1935         const StrBuf *Buf = SBstr(Tokens->Params[0]->Start,
1936                             Tokens->Params[0]->len);
1937         if (Buf != NULL)
1938                 StrBufAppendTemplate(Target, nArgs, Tokens,
1939                                      Context, ContextType,
1940                                      Buf, 1);
1941 }
1942
1943
1944 void tmplput_csslocal(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
1945 {
1946         extern StrBuf *csslocal;
1947         StrBufAppendBuf(Target,
1948                         csslocal, 0);
1949 }
1950
1951 void tmplput_url_part(StrBuf *Target, int nArgs, WCTemplateToken *Tokens, void *Context, int ContextType)
1952 {
1953         StrBuf *UrlBuf;
1954         struct wcsession *WCC = WC;
1955
1956         if (WCC != NULL) {
1957                 if (Tokens->Params[0]->lvalue == 0)
1958                         UrlBuf = WCC->UrlFragment1;
1959                 else
1960                         UrlBuf = WCC->UrlFragment2;
1961
1962                 StrBufAppendTemplate(Target, nArgs, Tokens, Context, ContextType,
1963                                      UrlBuf, 1);
1964         }
1965 }
1966
1967
1968
1969
1970 void
1971 InitModule_WEBCIT
1972 (void)
1973 {
1974         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS);
1975         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
1976         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX);
1977         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
1978         WebcitAddUrlHandler(HKEY("change_start_page"), change_start_page, 0);
1979         WebcitAddUrlHandler(HKEY("toggle_self_service"), toggle_self_service, 0);
1980         WebcitAddUrlHandler(HKEY("vcardphoto"), display_vcard_photo_img, NEED_URL);
1981         WebcitAddUrlHandler(HKEY("mimepart"), view_mimepart, NEED_URL);
1982         WebcitAddUrlHandler(HKEY("mimepart_download"), download_mimepart, NEED_URL);
1983         WebcitAddUrlHandler(HKEY("postpart"), view_postpart, NEED_URL);
1984         WebcitAddUrlHandler(HKEY("postpart_download"), download_postpart, NEED_URL);
1985         WebcitAddUrlHandler(HKEY("diagnostics"), diagnostics, NEED_URL);
1986
1987         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
1988         RegisterConditional(HKEY("COND:BSTR"), 1, ConditionalBstr, CTX_NONE);
1989         RegisterNamespace("BSTR", 1, 2, tmplput_bstr, CTX_NONE);
1990         RegisterNamespace("URLPART", 1, 2, tmplput_url_part, CTX_NONE);
1991         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, CTX_NONE);
1992         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
1993         RegisterNamespace("OFFERSTARTPAGE", 0, 0, offer_start_page, CTX_NONE);
1994         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, CTX_NONE);
1995 }