webcit/webcit.c

   1 /*
   2  * $Id$
   3  */
   4 /**
   5  * \defgroup MainServer This is the main transaction loop of the web service.  It maintains a
   6  * persistent session to the Citadel server, handling HTTP WebCit requests as
   7  * they arrive and presenting a user interface.
   8  * \ingroup WebcitHttpServer
   9  */
  10 /*@{*/
  11 #include "webcit.h"
  12 #include "groupdav.h"
  13 #include "webserver.h"
  14
  15 #include <stdio.h>
  16 #include <stdarg.h>
  17
  18 /**
  19  * String to unset the cookie.
  20  * Any date "in the past" will work, so I chose my birthday, right down to
  21  * the exact minute.  :)
  22  */
  23 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  24
  25 /**
  26  * \brief remove escaped strings from i.e. the url string (like %20 for blanks)
  27  * \param buf the buffer to examine
  28  */
  29 void unescape_input(char *buf)
  30 {
  31         int a, b;
  32         char hex[3];
  33         long buflen;
  34
  35         buflen = strlen(buf);
  36
  37         while ((buflen > 0) && (isspace(buf[buflen - 1]))){
  38                 buf[buflen - 1] = 0;
  39                 buflen --;
  40         }
  41
  42         a = 0;
  43         while (a < buflen) {
  44                 if (buf[a] == '+')
  45                         buf[a] = ' ';
  46                 if (buf[a] == '%') {
  47                         hex[0] = buf[a + 1];
  48                         hex[1] = buf[a + 2];
  49                         hex[2] = 0;
  50                         b = 0;
  51                         sscanf(hex, "%02x", &b);
  52                         buf[a] = (char) b;
  53                         memmove(&buf[a + 1], &buf[a + 3], buflen - a - 2);
  54
  55                         buflen -=2;
  56                 }
  57                 a++;
  58         }
  59
  60 }
  61
  62 /**
  63  * \brief Extract variables from the URL.
  64  * \param url URL supplied by the HTTP parser
  65  */
  66 void addurls(char *url)
  67 {
  68         char *up, *ptr;
  69         char buf[SIZ];
  70         int a, b, len;
  71         struct urlcontent *u;
  72
  73         up = url;
  74         while (!IsEmptyStr(up)) {
  75
  76                 /** locate the = sign */
  77                 safestrncpy(buf, up, sizeof buf);
  78                 b = (-1);
  79                 for (a = 255; a >= 0; --a)
  80                         if (buf[a] == '=')
  81                                 b = a;
  82                 if (b < 0)
  83                         return;
  84                 buf[b] = 0;
  85
  86                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
  87                 u->next = WC->urlstrings;
  88                 WC->urlstrings = u;
  89                 safestrncpy(u->url_key, buf, sizeof u->url_key);
  90
  91                 /** now chop that part off */
  92                 for (a = 0; a <= b; ++a)
  93                         ++up;
  94
  95                 /** locate "&" and "?" delimiters */
  96                 ptr = up;
  97                 len = b = strlen(up);
  98                 for (a = 0; a < len; ++a) {
  99                         if ( (ptr[0] == '&') || (ptr[0] == '?') ) {
 100                                 b = a;
 101                                 break;
 102                         }
 103                         ++ptr;
 104                 }
 105                 ptr = up + b;
 106                 *ptr = '\0';
 107
 108                 len = b;
 109                 u->url_data = malloc(len + 2);
 110                 safestrncpy(u->url_data, up, b + 1);
 111                 u->url_data[b] = 0;
 112                 unescape_input(u->url_data);
 113                 up = ptr;
 114                 ++up;
 115
 116                 /* lprintf(9, "%s = %s\n", u->url_key, u->url_data); */
 117         }
 118 }
 119
 120 /**
 121  * \brief free urlstring memory
 122  */
 123 void free_urls(void)
 124 {
 125         struct urlcontent *u;
 126
 127         while (WC->urlstrings != NULL) {
 128                 free(WC->urlstrings->url_data);
 129                 u = WC->urlstrings->next;
 130                 free(WC->urlstrings);
 131                 WC->urlstrings = u;
 132         }
 133 }
 134
 135 /**
 136  * \brief Diagnostic function to display the contents of all variables
 137  */
 138 void dump_vars(void)
 139 {
 140         struct urlcontent *u;
 141
 142         for (u = WC->urlstrings; u != NULL; u = u->next) {
 143                 wprintf("%38s = %s\n", u->url_key, u->url_data);
 144         }
 145 }
 146
 147 /**
 148  * \brief Return the value of a variable supplied to the current web page (from the url or a form)
 149  * \param key The name of the variable we want
 150  */
 151 char *bstr(char *key)
 152 {
 153         struct urlcontent *u;
 154
 155         for (u = WC->urlstrings; u != NULL; u = u->next) {
 156                 if (!strcasecmp(u->url_key, key))
 157                         return (u->url_data);
 158         }
 159         return ("");
 160 }
 161
 162 /**
 163  * \brief web-printing funcion. uses our vsnprintf wrapper
 164  * \param format printf format string
 165  * \param ... the varargs to put into formatstring
 166  */
 167 void wprintf(const char *format,...)
 168 {
 169         va_list arg_ptr;
 170         char wbuf[4096];
 171
 172         va_start(arg_ptr, format);
 173         vsnprintf(wbuf, sizeof wbuf, format, arg_ptr);
 174         va_end(arg_ptr);
 175
 176         client_write(wbuf, strlen(wbuf));
 177 }
 178
 179
 180 /**
 181  * \brief wrap up an HTTP session, closes tags, etc.
 182  * \todo multiline params?
 183  * \param print_standard_html_footer should be set to 0 to transmit only, 1 to
 184  * append the main menu and closing tags, or 2 to
 185  * append the closing tags only.
 186  */
 187 void wDumpContent(int print_standard_html_footer)
 188 {
 189         if (print_standard_html_footer) {
 190                 wprintf("</div>\n");    /* end of "text" div */
 191                 do_template("trailing");
 192         }
 193
 194         /* If we've been saving it all up for one big output burst,
 195          * go ahead and do that now.
 196          */
 197         end_burst();
 198 }
 199
 200
 201 /**
 202  * \brief Copy a string, escaping characters which have meaning in HTML.
 203  * \param target target buffer
 204  * \param strbuf source buffer
 205  * \param nbsp If nonzero, spaces are converted to non-breaking spaces.
 206  * \param nolinebreaks if set, linebreaks are removed from the string.
 207  */
 208 long stresc(char *target, long tSize, char *strbuf, int nbsp, int nolinebreaks)
 209 {
 210         char *aptr, *bptr, *eptr;
 211
 212         *target = '\0';
 213         aptr = strbuf;
 214         bptr = target;
 215         eptr = target + tSize - 6; // our biggest unit to put in...
 216
 217         while ((bptr < eptr) && !IsEmptyStr(aptr) ){
 218                 if (*aptr == '<') {
 219                         memcpy(bptr, "&lt;", 4);
 220                         bptr += 4;
 221                 }
 222                 else if (*aptr == '>') {
 223                         memcpy(bptr, "&gt;", 4);
 224                         bptr += 4;
 225                 }
 226                 else if (*aptr == '&') {
 227                         memcpy(bptr, "&amp;", 5);
 228                         bptr += 5;
 229                 }
 230                 else if (*aptr == '\"') {
 231                         memcpy(bptr, "&quot;", 6);
 232                         bptr += 6;
 233                 }
 234                 else if (*aptr == '\'') {
 235                         memcpy(bptr, "&#39;", 5);
 236                         bptr += 5;
 237                 }
 238                 else if (*aptr == LB) {
 239                         *bptr = '<';
 240                         bptr ++;
 241                 }
 242                 else if (*aptr == RB) {
 243                         *bptr = '>';
 244                         bptr ++;
 245                 }
 246                 else if (*aptr == QU) {
 247                         *bptr ='"';
 248                         bptr ++;
 249                 }
 250                 else if ((*aptr == 32) && (nbsp == 1)) {
 251                         memcpy(bptr, "&nbsp;", 6);
 252                         bptr += 6;
 253                 }
 254                 else if ((*aptr == '\n') && (nolinebreaks)) {
 255                         *bptr='\0';     /* nothing */
 256                 }
 257                 else if ((*aptr == '\r') && (nolinebreaks)) {
 258                         *bptr='\0';     /* nothing */
 259                 }
 260                 else{
 261                         *bptr = *aptr;
 262                         bptr++;
 263                 }
 264                 aptr ++;
 265         }
 266         *bptr = '\0';
 267         if ((bptr = eptr - 1 ) && !IsEmptyStr(aptr) )
 268                 return -1;
 269         return (bptr - target);
 270 }
 271
 272 /**
 273  * \brief WHAT???
 274  * \param strbuf what???
 275  * \param nbsp If nonzero, spaces are converted to non-breaking spaces.
 276  * \param nolinebreaks if set, linebreaks are removed from the string.
 277  */
 278 void escputs1(char *strbuf, int nbsp, int nolinebreaks)
 279 {
 280         char *buf;
 281         long Siz;
 282
 283         if (strbuf == NULL) return;
 284         Siz = (3 * strlen(strbuf)) + SIZ ;
 285         buf = malloc(Siz);
 286         stresc(buf, Siz, strbuf, nbsp, nolinebreaks);
 287         wprintf("%s", buf);
 288         free(buf);
 289 }
 290
 291 /**
 292  * \brief static wrapper for ecsputs1
 293  * \param strbuf buffer to print escaped to client
 294  */
 295 void escputs(char *strbuf)
 296 {
 297         escputs1(strbuf, 0, 0);
 298 }
 299
 300
 301 /**
 302  * \brief urlescape buffer and print it to the client
 303  * \param strbuf buffer to urlescape
 304  */
 305 void urlescputs(char *strbuf)
 306 {
 307         char outbuf[SIZ];
 308
 309         urlesc(outbuf, SIZ, strbuf);
 310         wprintf("%s", outbuf);
 311 }
 312
 313
 314 /**
 315  * \brief Copy a string, escaping characters for JavaScript strings.
 316  * \param target output string
 317  * \param strbuf input string
 318  */
 319 void jsesc(char *target, size_t tlen, char *strbuf)
 320 {
 321         int len;
 322         char *tend;
 323         char *send;
 324         char *tptr;
 325         char *sptr;
 326
 327         target[0]='\0';
 328         len = strlen (strbuf);
 329         send = strbuf + len;
 330         tend = target + tlen;
 331         sptr = strbuf;
 332         tptr = target;
 333
 334         while (!IsEmptyStr(sptr) &&
 335                (sptr < send) &&
 336                (tptr < tend)) {
 337
 338                 if (*sptr == '<')
 339                         *tptr = '[';
 340                 else if (*sptr == '>')
 341                         *tptr = ']';
 342                 else if (*sptr == '\'') {
 343                         if (tend - tptr < 3)
 344                                 return;
 345                         *(tptr++) = '\\';
 346                         *tptr = '\'';
 347                 }
 348                 else if (*sptr == '"') {
 349                         if (tend - tptr < 8)
 350                                 return;
 351                         *(tptr++) = '&';
 352                         *(tptr++) = 'q';
 353                         *(tptr++) = 'u';
 354                         *(tptr++) = 'o';
 355                         *(tptr++) = 't';
 356                         *tptr = ';';
 357                 }
 358                 else if (*sptr == '&') {
 359                         if (tend - tptr < 7)
 360                                 return;
 361                         *(tptr++) = '&';
 362                         *(tptr++) = 'a';
 363                         *(tptr++) = 'm';
 364                         *(tptr++) = 'p';
 365                         *tptr = ';';
 366                 } else {
 367                         *tptr = *sptr;
 368                 }
 369                 tptr++; sptr++;
 370         }
 371         *tptr = '\0';
 372 }
 373
 374 /**
 375  * \brief escape and print java script
 376  * \param strbuf the js code
 377  */
 378 void jsescputs(char *strbuf)
 379 {
 380         char outbuf[SIZ];
 381
 382         jsesc(outbuf, SIZ, strbuf);
 383         wprintf("%s", outbuf);
 384 }
 385
 386 /**
 387  * \brief Copy a string, escaping characters for message text hold
 388  * \param target target buffer
 389  * \param strbuf source buffer
 390  */
 391 void msgesc(char *target, size_t tlen, char *strbuf)
 392 {
 393         int len;
 394         char *tend;
 395         char *send;
 396         char *tptr;
 397         char *sptr;
 398
 399         target[0]='\0';
 400         len = strlen (strbuf);
 401         send = strbuf + len;
 402         tend = target + tlen;
 403         sptr = strbuf;
 404         tptr = target;
 405
 406         while (!IsEmptyStr(sptr) &&
 407                (sptr < send) &&
 408                (tptr < tend)) {
 409
 410                 if (*sptr == '\n')
 411                         *tptr = ' ';
 412                 else if (*sptr == '\r')
 413                         *tptr = ' ';
 414                 else if (*sptr == '\'') {
 415                         if (tend - tptr < 8)
 416                                 return;
 417                         *(tptr++) = '&';
 418                         *(tptr++) = '#';
 419                         *(tptr++) = '3';
 420                         *(tptr++) = '9';
 421                         *tptr = ';';
 422                 } else {
 423                         *tptr = *sptr;
 424                 }
 425                 tptr++; sptr++;
 426         }
 427         *tptr = '\0';
 428 }
 429
 430 /**
 431  * \brief print a string to the client after cleaning it with msgesc() and stresc()
 432  * \param strbuf string to be printed
 433  */
 434 void msgescputs1( char *strbuf)
 435 {
 436         char *outbuf;
 437         char *outbuf2;
 438         int buflen;
 439
 440         if (strbuf == NULL) return;
 441         buflen = 3 * strlen(strbuf) + SIZ;
 442         outbuf = malloc( buflen);
 443         outbuf2 = malloc( buflen);
 444         msgesc(outbuf, buflen, strbuf);
 445         stresc(outbuf2, buflen, outbuf, 0, 0);
 446         wprintf("%s", outbuf2);
 447         free(outbuf);
 448         free(outbuf2);
 449 }
 450
 451 /**
 452  * \brief print a string to the client after cleaning it with msgesc()
 453  * \param strbuf string to be printed
 454  */
 455 void msgescputs(char *strbuf) {
 456         char *outbuf;
 457         size_t len;
 458
 459         if (strbuf == NULL) return;
 460         len =  (3 * strlen(strbuf)) + SIZ;
 461         outbuf = malloc(len);
 462         msgesc(outbuf, len, strbuf);
 463         wprintf("%s", outbuf);
 464         free(outbuf);
 465 }
 466
 467
 468
 469
 470 /**
 471  * \brief Output all that important stuff that the browser will want to see
 472  */
 473 void output_headers(    int do_httpheaders,     /**< 1 = output HTTP headers                          */
 474                         int do_htmlhead,        /**< 1 = output HTML <head> section and <body> opener */
 475
 476                         int do_room_banner,     /**< 0=no, 1=yes,
 477                                                                  * 2 = I'm going to embed my own, so don't open the
 478                                                                  *     <div id="content"> either.
 479                                                                  */
 480
 481                         int unset_cookies,      /**< 1 = session is terminating, so unset the cookies */
 482                         int suppress_check,     /**< 1 = suppress check for instant messages          */
 483                         int cache               /**< 1 = allow browser to cache this page             */
 484 ) {
 485         char cookie[1024];
 486         char httpnow[128];
 487
 488         wprintf("HTTP/1.1 200 OK\n");
 489         http_datestring(httpnow, sizeof httpnow, time(NULL));
 490
 491         if (do_httpheaders) {
 492                 wprintf("Content-type: text/html; charset=utf-8\r\n"
 493                         "Server: %s / %s\n"
 494                         "Connection: close\r\n",
 495                         PACKAGE_STRING, serv_info.serv_software
 496                 );
 497         }
 498
 499         if (cache) {
 500                 wprintf("Pragma: public\r\n"
 501                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 502                         "Last-modified: %s\r\n",
 503                         httpnow
 504                 );
 505         }
 506         else {
 507                 wprintf("Pragma: no-cache\r\n"
 508                         "Cache-Control: no-store\r\n"
 509                         "Expires: -1\r\n"
 510                 );
 511         }
 512
 513         stuff_to_cookie(cookie, 1024, WC->wc_session, WC->wc_username,
 514                         WC->wc_password, WC->wc_roomname);
 515
 516         if (unset_cookies) {
 517                 wprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 518         } else {
 519                 wprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 520                 if (server_cookie != NULL) {
 521                         wprintf("%s\n", server_cookie);
 522                 }
 523         }
 524
 525         if (do_htmlhead) {
 526                 begin_burst();
 527                 if (!access("static.local/webcit.css", R_OK)) {
 528                         svprintf("CSSLOCAL", WCS_STRING,
 529                            "<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\">"
 530                         );
 531                 }
 532                 do_template("head");
 533         }
 534
 535         /** ICONBAR */
 536         if (do_htmlhead) {
 537
 538
 539                 /** check for ImportantMessages (these display in a div overlaying the main screen) */
 540                 if (!IsEmptyStr(WC->ImportantMessage)) {
 541                         wprintf("<div id=\"important_message\">\n"
 542                                 "<span class=\"imsg\">");
 543                         escputs(WC->ImportantMessage);
 544                         wprintf("</span><br />\n"
 545                                 "</div>\n"
 546                                 "<script type=\"text/javascript\">\n"
 547                                 "        setTimeout('hide_imsg_popup()', 5000); \n"
 548                                 "</script>\n");
 549                         WC->ImportantMessage[0] = 0;
 550                 }
 551
 552                 if ( (WC->logged_in) && (!unset_cookies) ) {
 553                         wprintf("<div id=\"iconbar\">");
 554                         do_selected_iconbar();
 555                         /** check for instant messages (these display in a new window) */
 556                         page_popup();
 557                         wprintf("</div>");
 558                 }
 559
 560                 if (do_room_banner == 1) {
 561                         wprintf("<div id=\"banner\">\n");
 562                         embed_room_banner(NULL, navbar_default);
 563                         wprintf("</div>\n");
 564                 }
 565         }
 566
 567         if (do_room_banner == 1) {
 568                 wprintf("<div id=\"content\">\n");
 569         }
 570 }
 571
 572
 573 /**
 574  * \brief Generic function to do an HTTP redirect.  Easy and fun.
 575  * \param whichpage target url to 302 to
 576  */
 577 void http_redirect(char *whichpage) {
 578         wprintf("HTTP/1.1 302 Moved Temporarily\n");
 579         wprintf("Location: %s\r\n", whichpage);
 580         wprintf("URI: %s\r\n", whichpage);
 581         wprintf("Content-type: text/html; charset=utf-8\r\n\r\n");
 582         wprintf("<html><body>");
 583         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 584         wprintf("</body></html>\n");
 585 }
 586
 587
 588
 589 /**
 590  * \brief Output a piece of content to the web browser
 591  */
 592 void http_transmit_thing(char *thing, size_t length, const char *content_type,
 593                          int is_static) {
 594
 595         output_headers(0, 0, 0, 0, 0, is_static);
 596
 597         wprintf("Content-type: %s\r\n"
 598                 "Server: %s\r\n"
 599                 "Connection: close\r\n",
 600                 content_type,
 601                 PACKAGE_STRING);
 602
 603 #ifdef HAVE_ZLIB
 604         /** If we can send the data out compressed, please do so. */
 605         if (WC->gzip_ok) {
 606                 char *compressed_data = NULL;
 607                 size_t compressed_len;
 608
 609                 compressed_len =  ((length * 101) / 100) + 100;
 610                 compressed_data = malloc(compressed_len);
 611
 612                 if (compress_gzip((Bytef *) compressed_data,
 613                                   &compressed_len,
 614                                   (Bytef *) thing,
 615                                   (uLongf) length, Z_BEST_SPEED) == Z_OK) {
 616                         wprintf("Content-encoding: gzip\r\n"
 617                                 "Content-length: %ld\r\n"
 618                                 "\r\n",
 619                                 (long) compressed_len
 620                         );
 621                         client_write(compressed_data, (size_t)compressed_len);
 622                         free(compressed_data);
 623                         return;
 624                 }
 625         }
 626 #endif
 627
 628         /** No compression ... just send it out as-is */
 629         wprintf("Content-length: %ld\r\n"
 630                 "\r\n",
 631                 (long) length
 632         );
 633         client_write(thing, (size_t)length);
 634 }
 635
 636 /**
 637  * \brief print menu box like used in the floor view or admin interface.
 638  * This function takes pair of strings as va_args,
 639  * \param Title Title string of the box
 640  * \param Class CSS Class for the box
 641  * \param nLines How many string pairs should we print? (URL, UrlText)
 642  * \param ... Pairs of URL Strings and their Names
 643  */
 644 void print_menu_box(char* Title, char *Class, int nLines, ...)
 645 {
 646         va_list arg_list;
 647         long i;
 648
 649         svprintf("BOXTITLE", WCS_STRING, Title);
 650         do_template("beginbox");
 651
 652         wprintf("<ul class=\"%s\">", Class);
 653
 654         va_start(arg_list, nLines);
 655         for (i = 0; i < nLines; ++i)
 656         {
 657                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 658                 wprintf((char *) va_arg(arg_list, char *));
 659                 wprintf("</a></li>\n");
 660         }
 661         va_end (arg_list);
 662
 663         wprintf("</a></li>\n");
 664
 665         wprintf("</ul>");
 666
 667         do_template("endbox");
 668 }
 669
 670
 671 /**
 672  * \brief dump out static pages from disk
 673  * \param what the file urs to print
 674  */
 675 void output_static(char *what)
 676 {
 677         FILE *fp;
 678         struct stat statbuf;
 679         off_t bytes;
 680         off_t count = 0;
 681         size_t res;
 682         char *bigbuffer;
 683         char content_type[128];
 684         int len;
 685
 686         fp = fopen(what, "rb");
 687         if (fp == NULL) {
 688                 lprintf(9, "output_static('%s')  -- NOT FOUND --\n", what);
 689                 wprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 690                 wprintf("Content-Type: text/plain\r\n");
 691                 wprintf("\r\n");
 692                 wprintf("Cannot open %s: %s\r\n", what, strerror(errno));
 693         } else {
 694                 len = strlen (what);
 695                 if (!strncasecmp(&what[len - 4], ".gif", 4))
 696                         safestrncpy(content_type, "image/gif", sizeof content_type);
 697                 else if (!strncasecmp(&what[len - 4], ".txt", 4))
 698                         safestrncpy(content_type, "text/plain", sizeof content_type);
 699                 else if (!strncasecmp(&what[len - 4], ".css", 4))
 700                         safestrncpy(content_type, "text/css", sizeof content_type);
 701                 else if (!strncasecmp(&what[len - 4], ".jpg", 4))
 702                         safestrncpy(content_type, "image/jpeg", sizeof content_type);
 703                 else if (!strncasecmp(&what[len - 4], ".png", 4))
 704                         safestrncpy(content_type, "image/png", sizeof content_type);
 705                 else if (!strncasecmp(&what[len - 4], ".ico", 4))
 706                         safestrncpy(content_type, "image/x-icon", sizeof content_type);
 707                 else if (!strncasecmp(&what[len - 5], ".html", 5))
 708                         safestrncpy(content_type, "text/html", sizeof content_type);
 709                 else if (!strncasecmp(&what[len - 4], ".htm", 4))
 710                         safestrncpy(content_type, "text/html", sizeof content_type);
 711                 else if (!strncasecmp(&what[len - 4], ".wml", 4))
 712                         safestrncpy(content_type, "text/vnd.wap.wml", sizeof content_type);
 713                 else if (!strncasecmp(&what[len - 5], ".wmls", 5))
 714                         safestrncpy(content_type, "text/vnd.wap.wmlscript", sizeof content_type);
 715                 else if (!strncasecmp(&what[len - 5], ".wmlc", 5))
 716                         safestrncpy(content_type, "application/vnd.wap.wmlc", sizeof content_type);
 717                 else if (!strncasecmp(&what[len - 6], ".wmlsc", 6))
 718                         safestrncpy(content_type, "application/vnd.wap.wmlscriptc", sizeof content_type);
 719                 else if (!strncasecmp(&what[len - 5], ".wbmp", 5))
 720                         safestrncpy(content_type, "image/vnd.wap.wbmp", sizeof content_type);
 721                 else if (!strncasecmp(&what[len - 3], ".js", 3))
 722                         safestrncpy(content_type, "text/javascript", sizeof content_type);
 723                 else
 724                         safestrncpy(content_type, "application/octet-stream", sizeof content_type);
 725
 726                 if (fstat(fileno(fp), &statbuf) == -1) {
 727                         lprintf(9, "output_static('%s')  -- FSTAT FAILED --\n", what);
 728                         wprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 729                         wprintf("Content-Type: text/plain\r\n");
 730                         wprintf("\r\n");
 731                         wprintf("Cannot fstat %s: %s\n", what, strerror(errno));
 732                         return;
 733                 }
 734
 735                 count = 0;
 736                 bytes = statbuf.st_size;
 737                 if ((bigbuffer = malloc(bytes + 2)) == NULL) {
 738                         lprintf(9, "output_static('%s')  -- MALLOC FAILED (%s) --\n", what, strerror(errno));
 739                         wprintf("HTTP/1.1 500 internal server error\r\n");
 740                         wprintf("Content-Type: text/plain\r\n");
 741                         wprintf("\r\n");
 742                         return;
 743                 }
 744                 while (count < bytes) {
 745                         if ((res = fread(bigbuffer + count, 1, bytes - count, fp)) == 0) {
 746                                 lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) %zu bytes of %zu --\n", what, strerror(errno), bytes - count, bytes);
 747                                 wprintf("HTTP/1.1 500 internal server error \r\n");
 748                                 wprintf("Content-Type: text/plain\r\n");
 749                                 wprintf("\r\n");
 750                                 return;
 751                         }
 752                         count += res;
 753                 }
 754
 755                 fclose(fp);
 756
 757                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
 758                 http_transmit_thing(bigbuffer, (size_t)bytes, content_type, 1);
 759                 free(bigbuffer);
 760         }
 761         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 762                 end_webcit_session();
 763         }
 764 }
 765
 766 /**
 767  * \brief When the browser requests an image file from the Citadel server,
 768  * this function is called to transmit it.
 769  */
 770 void output_image()
 771 {
 772         char buf[SIZ];
 773         char *xferbuf = NULL;
 774         off_t bytes;
 775         const char *MimeType;
 776
 777         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 778         serv_getln(buf, sizeof buf);
 779         if (buf[0] == '2') {
 780                 bytes = extract_long(&buf[4], 0);
 781                 xferbuf = malloc(bytes + 2);
 782
 783                 /** Read it from the server */
 784                 read_server_binary(xferbuf, bytes);
 785                 serv_puts("CLOS");
 786                 serv_getln(buf, sizeof buf);
 787
 788                 MimeType = GuessMimeType (xferbuf, bytes);
 789                 /** Write it to the browser */
 790                 if (!IsEmptyStr(MimeType))
 791                 {
 792                         http_transmit_thing(xferbuf,
 793                                             (size_t)bytes,
 794                                             MimeType,
 795                                             0);
 796                         free(xferbuf);
 797                         return;
 798                 }
 799                 /* hm... unknown mimetype? fallback to blank gif */
 800                 free(xferbuf);
 801         }
 802
 803
 804         /**
 805          * Instead of an ugly 404, send a 1x1 transparent GIF
 806          * when there's no such image on the server.
 807          */
 808         char blank_gif[SIZ];
 809         snprintf (blank_gif, SIZ, "%s%s", static_dirs[0], "/blank.gif");
 810         output_static(blank_gif);
 811 }
 812
 813 /**
 814  * \brief Generic function to output an arbitrary MIME part from an arbitrary
 815  *        message number on the server.
 816  *
 817  * \param msgnum                Number of the item on the citadel server
 818  * \param partnum               The MIME part to be output
 819  * \param force_download        Nonzero to force set the Content-Type: header
 820  *                              to "application/octet-stream"
 821  */
 822 void mimepart(char *msgnum, char *partnum, int force_download)
 823 {
 824         char buf[256];
 825         off_t bytes;
 826         char content_type[256];
 827         char *content = NULL;
 828
 829         serv_printf("OPNA %s|%s", msgnum, partnum);
 830         serv_getln(buf, sizeof buf);
 831         if (buf[0] == '2') {
 832                 bytes = extract_long(&buf[4], 0);
 833                 content = malloc(bytes + 2);
 834                 if (force_download) {
 835                         strcpy(content_type, "application/octet-stream");
 836                 }
 837                 else {
 838                         extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
 839                 }
 840                 output_headers(0, 0, 0, 0, 0, 0);
 841                 read_server_binary(content, bytes);
 842                 serv_puts("CLOS");
 843                 serv_getln(buf, sizeof buf);
 844                 http_transmit_thing(content, bytes, content_type, 0);
 845                 free(content);
 846         } else {
 847                 wprintf("HTTP/1.1 404 %s\n", &buf[4]);
 848                 output_headers(0, 0, 0, 0, 0, 0);
 849                 wprintf("Content-Type: text/plain\r\n");
 850                 wprintf("\r\n");
 851                 wprintf(_("An error occurred while retrieving this part: %s\n"), &buf[4]);
 852         }
 853
 854 }
 855
 856
 857 /**
 858  * \brief Read any MIME part of a message, from the server, into memory.
 859  * \param msgnum number of the message on the citadel server
 860  * \param partnum the MIME part to be loaded
 861  */
 862 char *load_mimepart(long msgnum, char *partnum)
 863 {
 864         char buf[SIZ];
 865         off_t bytes;
 866         char content_type[SIZ];
 867         char *content;
 868
 869         serv_printf("DLAT %ld|%s", msgnum, partnum);
 870         serv_getln(buf, sizeof buf);
 871         if (buf[0] == '6') {
 872                 bytes = extract_long(&buf[4], 0);
 873                 extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
 874
 875                 content = malloc(bytes + 2);
 876                 serv_read(content, bytes);
 877
 878                 content[bytes] = 0;     /* null terminate for good measure */
 879                 return(content);
 880         }
 881         else {
 882                 return(NULL);
 883         }
 884
 885 }
 886
 887
 888 /**
 889  * \brief Convenience functions to display a page containing only a string
 890  * \param titlebarcolor color of the titlebar of the frame
 891  * \param titlebarmsg text to display in the title bar
 892  * \param messagetext body of the box
 893  */
 894 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 895 {
 896         wprintf("HTTP/1.1 200 OK\n");
 897         output_headers(1, 1, 2, 0, 0, 0);
 898         wprintf("<div id=\"banner\">\n");
 899         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 900         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 901         wprintf("</td></tr></table>\n");
 902         wprintf("</div>\n<div id=\"content\">\n");
 903         escputs(messagetext);
 904
 905         wprintf("<hr />\n");
 906         wDumpContent(1);
 907 }
 908
 909
 910 /**
 911  * \brief Display a blank page.
 912  */
 913 void blank_page(void) {
 914         output_headers(1, 1, 0, 0, 0, 0);
 915         wDumpContent(2);
 916 }
 917
 918
 919 /**
 920  * \brief A template has been requested
 921  */
 922 void url_do_template(void) {
 923         do_template(bstr("template"));
 924 }
 925
 926
 927
 928 /**
 929  * \brief Offer to make any page the user's "start page."
 930  */
 931 void offer_start_page(void) {
 932         wprintf("<a href=\"change_start_page?startpage=");
 933         urlescputs(WC->this_page);
 934         wprintf("\">");
 935         wprintf(_("Make this my start page"));
 936         wprintf("</a>");
 937 #ifdef TECH_PREVIEW
 938         wprintf("<br/><a href=\"rss?room=");
 939         urlescputs(WC->wc_roomname);
 940         wprintf("\" title=\"RSS 2.0 feed for ");
 941         escputs(WC->wc_roomname);
 942         wprintf("\"><img alt=\"RSS\" border=\"0\" src=\"static/xml_button.gif\"/></a>\n");
 943 #endif
 944 }
 945
 946
 947 /**
 948  * \brief Change the user's start page
 949  */
 950 void change_start_page(void) {
 951
 952         if (bstr("startpage") == NULL) {
 953                 safestrncpy(WC->ImportantMessage,
 954                         _("You no longer have a start page selected."),
 955                         sizeof WC->ImportantMessage);
 956                 display_main_menu();
 957                 return;
 958         }
 959
 960         set_preference("startpage", bstr("startpage"), 1);
 961
 962         output_headers(1, 1, 0, 0, 0, 0);
 963         do_template("newstartpage");
 964         wDumpContent(1);
 965 }
 966
 967
 968
 969 /**
 970  * \brief convenience function to indicate success
 971  * \param successmessage the mesage itself
 972  */
 973 void display_success(char *successmessage)
 974 {
 975         convenience_page("007700", "OK", successmessage);
 976 }
 977
 978
 979 /**
 980  * \brief Authorization required page
 981  * This is probably temporary and should be revisited
 982  * \param message message to put in header
 983 */
 984 void authorization_required(const char *message)
 985 {
 986         wprintf("HTTP/1.1 401 Authorization Required\r\n");
 987         wprintf("WWW-Authenticate: Basic realm=\"\"\r\n", serv_info.serv_humannode);
 988         wprintf("Content-Type: text/html\r\n\r\n");
 989         wprintf("<h1>");
 990         wprintf(_("Authorization Required"));
 991         wprintf("</h1>\r\n");
 992         wprintf(_("The resource you requested requires a valid username and password. "
 993                 "You could not be logged in: %s\n"), message);
 994         wDumpContent(0);
 995 }
 996
 997 /**
 998  * \brief This function is called by the MIME parser to handle data uploaded by
 999  *        the browser.  Form data, uploaded files, and the data from HTTP PUT
1000  *        operations (such as those found in GroupDAV) all arrive this way.
1001  *
1002  * \param name Name of the item being uploaded
1003  * \param filename Filename of the item being uploaded
1004  * \param partnum MIME part identifier (not needed)
1005  * \param disp MIME content disposition (not needed)
1006  * \param content The actual data
1007  * \param cbtype MIME content-type
1008  * \param cbcharset Character set
1009  * \param length Content length
1010  * \param encoding MIME encoding type (not needed)
1011  * \param userdata Not used here
1012  */
1013 void upload_handler(char *name, char *filename, char *partnum, char *disp,
1014                         void *content, char *cbtype, char *cbcharset,
1015                         size_t length, char *encoding, void *userdata)
1016 {
1017         struct urlcontent *u;
1018
1019         lprintf(9, "upload_handler() name=%s, type=%s, len=%d\n", name, cbtype, length);
1020
1021         /* Form fields */
1022         if ( (length > 0) && (IsEmptyStr(cbtype)) ) {
1023                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
1024                 u->next = WC->urlstrings;
1025                 WC->urlstrings = u;
1026                 safestrncpy(u->url_key, name, sizeof(u->url_key));
1027                 u->url_data = malloc(length + 1);
1028                 memcpy(u->url_data, content, length);
1029                 u->url_data[length] = 0;
1030                 /* lprintf(9, "Key: <%s>  Data: <%s>\n", u->url_key, u->url_data); */
1031         }
1032
1033         /** Uploaded files */
1034         if ( (length > 0) && (!IsEmptyStr(cbtype)) ) {
1035                 WC->upload = malloc(length);
1036                 if (WC->upload != NULL) {
1037                         WC->upload_length = length;
1038                         safestrncpy(WC->upload_filename, filename,
1039                                         sizeof(WC->upload_filename));
1040                         safestrncpy(WC->upload_content_type, cbtype,
1041                                         sizeof(WC->upload_content_type));
1042                         memcpy(WC->upload, content, length);
1043                 }
1044                 else {
1045                         lprintf(3, "malloc() failed: %s\n", strerror(errno));
1046                 }
1047         }
1048
1049 }
1050
1051 /**
1052  * \brief Convenience functions to wrap around asynchronous ajax responses
1053  */
1054 void begin_ajax_response(void) {
1055         output_headers(0, 0, 0, 0, 0, 0);
1056
1057         wprintf("Content-type: text/html; charset=UTF-8\r\n"
1058                 "Server: %s\r\n"
1059                 "Connection: close\r\n"
1060                 "Pragma: no-cache\r\n"
1061                 "Cache-Control: no-cache\r\n"
1062                 "Expires: -1\r\n"
1063                 ,
1064                 PACKAGE_STRING);
1065         begin_burst();
1066 }
1067
1068 /**
1069  * \brief print ajax response footer
1070  */
1071 void end_ajax_response(void) {
1072         wprintf("\r\n");
1073         wDumpContent(0);
1074 }
1075
1076 /**
1077  * \brief Wraps a Citadel server command in an AJAX transaction.
1078  */
1079 void ajax_servcmd(void)
1080 {
1081         char buf[1024];
1082         char gcontent[1024];
1083         char *junk;
1084         size_t len;
1085
1086         begin_ajax_response();
1087
1088         serv_printf("%s", bstr("g_cmd"));
1089         serv_getln(buf, sizeof buf);
1090         wprintf("%s\n", buf);
1091
1092         if (buf[0] == '8') {
1093                 serv_printf("\n\n000");
1094         }
1095         if ((buf[0] == '1') || (buf[0] == '8')) {
1096                 while (serv_getln(gcontent, sizeof gcontent), strcmp(gcontent, "000")) {
1097                         wprintf("%s\n", gcontent);
1098                 }
1099                 wprintf("000");
1100         }
1101         if (buf[0] == '4') {
1102                 text_to_server(bstr("g_input"));
1103                 serv_puts("000");
1104         }
1105         if (buf[0] == '6') {
1106                 len = atol(&buf[4]);
1107                 junk = malloc(len);
1108                 serv_read(junk, len);
1109                 free(junk);
1110         }
1111         if (buf[0] == '7') {
1112                 len = atol(&buf[4]);
1113                 junk = malloc(len);
1114                 memset(junk, 0, len);
1115                 serv_write(junk, len);
1116                 free(junk);
1117         }
1118
1119         end_ajax_response();
1120
1121         /**
1122          * This is kind of an ugly hack, but this is the only place it can go.
1123          * If the command was GEXP, then the instant messenger window must be
1124          * running, so reset the "last_pager_check" watchdog timer so
1125          * that page_popup() doesn't try to open it a second time.
1126          */
1127         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
1128                 WC->last_pager_check = time(NULL);
1129         }
1130 }
1131
1132
1133 /**
1134  * \brief Helper function for the asynchronous check to see if we need
1135  * to open the instant messenger window.
1136  */
1137 void seconds_since_last_gexp(void)
1138 {
1139         char buf[256];
1140
1141         begin_ajax_response();
1142         if ( (time(NULL) - WC->last_pager_check) < 30) {
1143                 wprintf("NO\n");
1144         }
1145         else {
1146                 serv_puts("NOOP");
1147                 serv_getln(buf, sizeof buf);
1148                 if (buf[3] == '*') {
1149                         wprintf("YES");
1150                 }
1151                 else {
1152                         wprintf("NO");
1153                 }
1154         }
1155         end_ajax_response();
1156 }
1157
1158
1159
1160
1161 /**
1162  * \brief Entry point for WebCit transaction
1163  */
1164 void session_loop(struct httprequest *req)
1165 {
1166         char cmd[1024];
1167         char action[1024];
1168         char arg[8][128];
1169         size_t sizes[10];
1170         char *index[10];
1171         char buf[SIZ];
1172         char request_method[128];
1173         char pathname[1024];
1174         int a, b, nBackDots, nEmpty;
1175         int ContentLength = 0;
1176         int BytesRead = 0;
1177         char ContentType[512];
1178         char *content = NULL;
1179         char *content_end = NULL;
1180         struct httprequest *hptr;
1181         char browser_host[256];
1182         char user_agent[256];
1183         int body_start = 0;
1184         int is_static = 0;
1185         int n_static = 0;
1186         int len = 0;
1187         /**
1188          * We stuff these with the values coming from the client cookies,
1189          * so we can use them to reconnect a timed out session if we have to.
1190          */
1191         char c_username[SIZ];
1192         char c_password[SIZ];
1193         char c_roomname[SIZ];
1194         char c_httpauth_string[SIZ];
1195         char c_httpauth_user[SIZ];
1196         char c_httpauth_pass[SIZ];
1197         char cookie[SIZ];
1198
1199         safestrncpy(c_username, "", sizeof c_username);
1200         safestrncpy(c_password, "", sizeof c_password);
1201         safestrncpy(c_roomname, "", sizeof c_roomname);
1202         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
1203         safestrncpy(c_httpauth_user, DEFAULT_HTTPAUTH_USER, sizeof c_httpauth_user);
1204         safestrncpy(c_httpauth_pass, DEFAULT_HTTPAUTH_PASS, sizeof c_httpauth_pass);
1205         strcpy(browser_host, "");
1206
1207         WC->upload_length = 0;
1208         WC->upload = NULL;
1209         WC->vars = NULL;
1210         WC->is_wap = 0;
1211
1212         hptr = req;
1213         if (hptr == NULL) return;
1214
1215         safestrncpy(cmd, hptr->line, sizeof cmd);
1216         hptr = hptr->next;
1217         extract_token(request_method, cmd, 0, ' ', sizeof request_method);
1218         extract_token(pathname, cmd, 1, ' ', sizeof pathname);
1219
1220         /** Figure out the action */
1221         index[0] = action;
1222         sizes[0] = sizeof action;
1223         for (a=1; a<9; a++)
1224         {
1225                 index[a] = arg[a-1];
1226                 sizes[a] = sizeof arg[a-1];
1227         }
1228 ////    index[9] = &foo; todo
1229         nBackDots = 0;
1230         nEmpty = 0;
1231         for ( a = 0; a < 9; ++a)
1232         {
1233                 extract_token(index[a], pathname, a + 1, '/', sizes[a]);
1234                 if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
1235                 if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
1236                 if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
1237                 if ((index[a][0] == '.') && (index[a][1] == '.'))
1238                         nBackDots++;
1239                 if (index[a][0] == '\0')
1240                         nEmpty++;
1241         }
1242
1243         while (hptr != NULL) {
1244                 safestrncpy(buf, hptr->line, sizeof buf);
1245                 /* lprintf(9, "HTTP HEADER: %s\n", buf); */
1246                 hptr = hptr->next;
1247
1248                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
1249                         safestrncpy(cookie, &buf[15], sizeof cookie);
1250                         cookie_to_stuff(cookie, NULL,
1251                                         c_username, sizeof c_username,
1252                                         c_password, sizeof c_password,
1253                                         c_roomname, sizeof c_roomname);
1254                 }
1255                 else if (!strncasecmp(buf, "Authorization: Basic ", 21)) {
1256                         CtdlDecodeBase64(c_httpauth_string, &buf[21], strlen(&buf[21]));
1257                         extract_token(c_httpauth_user, c_httpauth_string, 0, ':', sizeof c_httpauth_user);
1258                         extract_token(c_httpauth_pass, c_httpauth_string, 1, ':', sizeof c_httpauth_pass);
1259                 }
1260                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
1261                         ContentLength = atoi(&buf[16]);
1262                 }
1263                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
1264                         safestrncpy(ContentType, &buf[14], sizeof ContentType);
1265                 }
1266                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
1267                         safestrncpy(user_agent, &buf[12], sizeof user_agent);
1268                 }
1269                 else if (!strncasecmp(buf, "X-Forwarded-Host: ", 18)) {
1270                         if (follow_xff) {
1271                                 safestrncpy(WC->http_host, &buf[18], sizeof WC->http_host);
1272                         }
1273                 }
1274                 else if (!strncasecmp(buf, "Host: ", 6)) {
1275                         if (IsEmptyStr(WC->http_host)) {
1276                                 safestrncpy(WC->http_host, &buf[6], sizeof WC->http_host);
1277                         }
1278                 }
1279                 else if (!strncasecmp(buf, "X-Forwarded-For: ", 17)) {
1280                         safestrncpy(browser_host, &buf[17], sizeof browser_host);
1281                         while (num_tokens(browser_host, ',') > 1) {
1282                                 remove_token(browser_host, 0, ',');
1283                         }
1284                         striplt(browser_host);
1285                 }
1286                 /** Only WAP gateways explicitly name this content-type */
1287                 else if (strstr(buf, "text/vnd.wap.wml")) {
1288                         WC->is_wap = 1;
1289                 }
1290         }
1291
1292         if (ContentLength > 0) {
1293                 content = malloc(ContentLength + SIZ);
1294                 memset(content, 0, ContentLength + SIZ);
1295                 snprintf(content,  ContentLength + SIZ, "Content-type: %s\n"
1296                                 "Content-length: %d\n\n",
1297                                 ContentType, ContentLength);
1298                 body_start = strlen(content);
1299
1300                 /** Read the entire input data at once. */
1301                 client_read(WC->http_sock, &content[BytesRead+body_start], ContentLength);
1302
1303                 if (!strncasecmp(ContentType, "application/x-www-form-urlencoded", 33)) {
1304                         addurls(&content[body_start]);
1305                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
1306                         content_end = content + ContentLength + body_start;
1307                         mime_parser(content, content_end, *upload_handler, NULL, NULL, NULL, 0);
1308                 }
1309         } else {
1310                 content = NULL;
1311         }
1312
1313         /** make a note of where we are in case the user wants to save it */
1314         safestrncpy(WC->this_page, cmd, sizeof(WC->this_page));
1315         remove_token(WC->this_page, 2, ' ');
1316         remove_token(WC->this_page, 0, ' ');
1317
1318         /** If there are variables in the URL, we must grab them now */
1319         len = strlen(cmd);
1320         for (a = 0; a < len; ++a) {
1321                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
1322                         for (b = a; b < len; ++b) {
1323                                 if (isspace(cmd[b])){
1324                                         cmd[b] = 0;
1325                                         len = b - 1;
1326                                 }
1327                         }
1328                         addurls(&cmd[a + 1]);
1329                         cmd[a] = 0;
1330                         len = a - 1;
1331                 }
1332         }
1333
1334         /** If it's a "force 404" situation then display the error and bail. */
1335         if (!strcmp(action, "404")) {
1336                 wprintf("HTTP/1.1 404 Not found\r\n");
1337                 wprintf("Content-Type: text/plain\r\n");
1338                 wprintf("\r\n");
1339                 wprintf("Not found\r\n");
1340                 goto SKIP_ALL_THIS_CRAP;
1341         }
1342
1343         /** Static content can be sent without connecting to Citadel. */
1344         is_static = 0;
1345         for (a=0; a<ndirs; ++a) {
1346                 if (!strcasecmp(action, (char*)static_content_dirs[a])) { /* map web to disk location */
1347                         is_static = 1;
1348                         n_static = a;
1349                 }
1350         }
1351         if (is_static) {
1352                 if (nBackDots < 2)
1353                 {
1354                         snprintf(buf, sizeof buf, "%s/%s/%s/%s/%s/%s/%s/%s",
1355                                  static_dirs[n_static],
1356                                  index[1], index[2], index[3], index[4], index[5], index[6], index[7]);
1357                         for (a=0; a<8; ++a) {
1358                                 if (buf[strlen(buf)-1] == '/') {
1359                                         buf[strlen(buf)-1] = 0;
1360                                 }
1361                         }
1362                         for (a = 0; a < strlen(buf); ++a) {
1363                                 if (isspace(buf[a])) {
1364                                         buf[a] = 0;
1365                                 }
1366                         }
1367                         output_static(buf);
1368                 }
1369                 else
1370                 {
1371                         lprintf(9, "Suspicious request. Ignoring.");
1372                         wprintf("HTTP/1.1 404 Security check failed\r\n");
1373                         wprintf("Content-Type: text/plain\r\n");
1374                         wprintf("\r\n");
1375                         wprintf("You have sent a malformed or invalid request.\r\n");
1376                 }
1377                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
1378         }
1379
1380         /* If the client sent a nonce that is incorrect, kill the request. */
1381         if (strlen(bstr("nonce")) > 0) {
1382                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
1383                         bstr("nonce"), WC->nonce);
1384                 if (atoi(bstr("nonce")) != WC->nonce) {
1385                         lprintf(9, "Ignoring request with mismatched nonce.\n");
1386                         wprintf("HTTP/1.1 404 Security check failed\r\n");
1387                         wprintf("Content-Type: text/plain\r\n");
1388                         wprintf("\r\n");
1389                         wprintf("Security check failed.\r\n");
1390                         goto SKIP_ALL_THIS_CRAP;
1391                 }
1392         }
1393
1394         /**
1395          * If we're not connected to a Citadel server, try to hook up the
1396          * connection now.
1397          */
1398         if (!WC->connected) {
1399                 if (!strcasecmp(ctdlhost, "uds")) {
1400                         /* unix domain socket */
1401                         snprintf(buf, SIZ, "%s/citadel.socket", ctdlport);
1402                         WC->serv_sock = uds_connectsock(buf);
1403                 }
1404                 else {
1405                         /* tcp socket */
1406                         WC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
1407                 }
1408
1409                 if (WC->serv_sock < 0) {
1410                         do_logout();
1411                         goto SKIP_ALL_THIS_CRAP;
1412                 }
1413                 else {
1414                         WC->connected = 1;
1415                         serv_getln(buf, sizeof buf);    /** get the server welcome message */
1416
1417                         /**
1418                          * From what host is our user connecting?  Go with
1419                          * the host at the other end of the HTTP socket,
1420                          * unless we are following X-Forwarded-For: headers
1421                          * and such a header has already turned up something.
1422                          */
1423                         if ( (!follow_xff) || (strlen(browser_host) == 0) ) {
1424                                 locate_host(browser_host, WC->http_sock);
1425                         }
1426
1427                         get_serv_info(browser_host, user_agent);
1428                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
1429                                 wprintf(_("You are connected to a Citadel "
1430                                         "server running Citadel %d.%02d. \n"
1431                                         "In order to run this version of WebCit "
1432                                         "you must also have Citadel %d.%02d or"
1433                                         " newer.\n\n\n"),
1434                                                 serv_info.serv_rev_level / 100,
1435                                                 serv_info.serv_rev_level % 100,
1436                                                 MINIMUM_CIT_VERSION / 100,
1437                                                 MINIMUM_CIT_VERSION % 100
1438                                         );
1439                                 end_webcit_session();
1440                                 goto SKIP_ALL_THIS_CRAP;
1441                         }
1442                 }
1443         }
1444
1445         /**
1446          * Functions which can be performed without logging in
1447          */
1448         if (!strcasecmp(action, "listsub")) {
1449                 do_listsub();
1450                 goto SKIP_ALL_THIS_CRAP;
1451         }
1452 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1453         if (!strcasecmp(action, "freebusy")) {
1454                 do_freebusy(cmd);
1455                 goto SKIP_ALL_THIS_CRAP;
1456         }
1457 #endif
1458
1459         /**
1460          * If we're not logged in, but we have HTTP Authentication data,
1461          * try logging in to Citadel using that.
1462          */
1463         if ((!WC->logged_in)
1464            && (strlen(c_httpauth_user) > 0)
1465            && (strlen(c_httpauth_pass) > 0)) {
1466                 serv_printf("USER %s", c_httpauth_user);
1467                 serv_getln(buf, sizeof buf);
1468                 if (buf[0] == '3') {
1469                         serv_printf("PASS %s", c_httpauth_pass);
1470                         serv_getln(buf, sizeof buf);
1471                         if (buf[0] == '2') {
1472                                 become_logged_in(c_httpauth_user,
1473                                                 c_httpauth_pass, buf);
1474                                 safestrncpy(WC->httpauth_user, c_httpauth_user, sizeof WC->httpauth_user);
1475                                 safestrncpy(WC->httpauth_pass, c_httpauth_pass, sizeof WC->httpauth_pass);
1476                         } else {
1477                                 /** Should only display when password is wrong */
1478                                 authorization_required(&buf[4]);
1479                                 goto SKIP_ALL_THIS_CRAP;
1480                         }
1481                 }
1482         }
1483
1484         /** This needs to run early */
1485 #ifdef TECH_PREVIEW
1486         if (!strcasecmp(action, "rss")) {
1487                 display_rss(bstr("room"), request_method);
1488                 goto SKIP_ALL_THIS_CRAP;
1489         }
1490 #endif
1491
1492         /**
1493          * The GroupDAV stuff relies on HTTP authentication instead of
1494          * our session's authentication.
1495          */
1496         if (!strncasecmp(action, "groupdav", 8)) {
1497                 groupdav_main(req, ContentType, /* do GroupDAV methods */
1498                         ContentLength, content+body_start);
1499                 if (!WC->logged_in) {
1500                         WC->killthis = 1;       /* If not logged in, don't */
1501                 }                               /* keep the session active */
1502                 goto SKIP_ALL_THIS_CRAP;
1503         }
1504
1505
1506         /**
1507          * Automatically send requests with any method other than GET or
1508          * POST to the GroupDAV code as well.
1509          */
1510         if ((strcasecmp(request_method, "GET")) && (strcasecmp(request_method, "POST"))) {
1511                 groupdav_main(req, ContentType, /** do GroupDAV methods */
1512                         ContentLength, content+body_start);
1513                 if (!WC->logged_in) {
1514                         WC->killthis = 1;       /** If not logged in, don't */
1515                 }                               /** keep the session active */
1516                 goto SKIP_ALL_THIS_CRAP;
1517         }
1518
1519         /**
1520          * If we're not logged in, but we have username and password cookies
1521          * supplied by the browser, try using them to log in.
1522          */
1523         if ((!WC->logged_in)
1524            && (!IsEmptyStr(c_username))
1525            && (!IsEmptyStr(c_password))) {
1526                 serv_printf("USER %s", c_username);
1527                 serv_getln(buf, sizeof buf);
1528                 if (buf[0] == '3') {
1529                         serv_printf("PASS %s", c_password);
1530                         serv_getln(buf, sizeof buf);
1531                         if (buf[0] == '2') {
1532                                 become_logged_in(c_username, c_password, buf);
1533                         }
1534                 }
1535         }
1536         /**
1537          * If we don't have a current room, but a cookie specifying the
1538          * current room is supplied, make an effort to go there.
1539          */
1540         if ((IsEmptyStr(WC->wc_roomname)) && (!IsEmptyStr(c_roomname))) {
1541                 serv_printf("GOTO %s", c_roomname);
1542                 serv_getln(buf, sizeof buf);
1543                 if (buf[0] == '2') {
1544                         safestrncpy(WC->wc_roomname, c_roomname, sizeof WC->wc_roomname);
1545                 }
1546         }
1547
1548         if (!strcasecmp(action, "image")) {
1549                 output_image();
1550
1551                 /**
1552                  * All functions handled below this point ... make sure we log in
1553                  * before doing anything else!
1554                  */
1555         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
1556                 do_login();
1557         } else if (!WC->logged_in) {
1558                 display_login(NULL);
1559         }
1560
1561         /**
1562          * Various commands...
1563          */
1564
1565         else if (!strcasecmp(action, "do_welcome")) {
1566                 do_welcome();
1567         } else if (!strcasecmp(action, "blank")) {
1568                 blank_page();
1569         } else if (!strcasecmp(action, "do_template")) {
1570                 url_do_template();
1571         } else if (!strcasecmp(action, "display_aide_menu")) {
1572                 display_aide_menu();
1573         } else if (!strcasecmp(action, "server_shutdown")) {
1574                 display_shutdown();
1575         } else if (!strcasecmp(action, "display_main_menu")) {
1576                 display_main_menu();
1577         } else if (!strcasecmp(action, "who")) {
1578                 who();
1579         } else if (!strcasecmp(action, "sslg")) {
1580                 seconds_since_last_gexp();
1581         } else if (!strcasecmp(action, "who_inner_html")) {
1582                 begin_ajax_response();
1583                 who_inner_div();
1584                 end_ajax_response();
1585         } else if (!strcasecmp(action, "wholist_section")) {
1586                 begin_ajax_response();
1587                 wholist_section();
1588                 end_ajax_response();
1589         } else if (!strcasecmp(action, "new_messages_html")) {
1590                 begin_ajax_response();
1591                 new_messages_section();
1592                 end_ajax_response();
1593         } else if (!strcasecmp(action, "tasks_inner_html")) {
1594                 begin_ajax_response();
1595                 tasks_section();
1596                 end_ajax_response();
1597         } else if (!strcasecmp(action, "calendar_inner_html")) {
1598                 begin_ajax_response();
1599                 calendar_section();
1600                 end_ajax_response();
1601         } else if (!strcasecmp(action, "mini_calendar")) {
1602                 begin_ajax_response();
1603                 ajax_mini_calendar();
1604                 end_ajax_response();
1605         } else if (!strcasecmp(action, "iconbar_ajax_menu")) {
1606                 begin_ajax_response();
1607                 do_iconbar();
1608                 end_ajax_response();
1609         } else if (!strcasecmp(action, "iconbar_ajax_rooms")) {
1610                 begin_ajax_response();
1611                 do_iconbar_roomlist();
1612                 end_ajax_response();
1613         } else if (!strcasecmp(action, "knrooms")) {
1614                 knrooms();
1615         } else if (!strcasecmp(action, "gotonext")) {
1616                 slrp_highest();
1617                 gotonext();
1618         } else if (!strcasecmp(action, "skip")) {
1619                 gotonext();
1620         } else if (!strcasecmp(action, "ungoto")) {
1621                 ungoto();
1622         } else if (!strcasecmp(action, "dotgoto")) {
1623                 if (WC->wc_view != VIEW_MAILBOX) {      /* dotgoto acts like dotskip when we're in a mailbox view */
1624                         slrp_highest();
1625                 }
1626                 smart_goto(bstr("room"));
1627         } else if (!strcasecmp(action, "dotskip")) {
1628                 smart_goto(bstr("room"));
1629         } else if (!strcasecmp(action, "termquit")) {
1630                 do_logout();
1631         } else if (!strcasecmp(action, "readnew")) {
1632                 readloop("readnew");
1633         } else if (!strcasecmp(action, "readold")) {
1634                 readloop("readold");
1635         } else if (!strcasecmp(action, "readfwd")) {
1636                 readloop("readfwd");
1637         } else if (!strcasecmp(action, "headers")) {
1638                 readloop("headers");
1639         } else if (!strcasecmp(action, "do_search")) {
1640                 readloop("do_search");
1641         } else if (!strcasecmp(action, "msg")) {
1642                 embed_message(index[1]);
1643         } else if (!strcasecmp(action, "printmsg")) {
1644                 print_message(index[1]);
1645         } else if (!strcasecmp(action, "msgheaders")) {
1646                 display_headers(index[1]);
1647         } else if (!strcasecmp(action, "wiki")) {
1648                 display_wiki_page();
1649         } else if (!strcasecmp(action, "display_enter")) {
1650                 display_enter();
1651         } else if (!strcasecmp(action, "post")) {
1652                 post_message();
1653         } else if (!strcasecmp(action, "move_msg")) {
1654                 move_msg();
1655         } else if (!strcasecmp(action, "delete_msg")) {
1656                 delete_msg();
1657         } else if (!strcasecmp(action, "userlist")) {
1658                 userlist();
1659         } else if (!strcasecmp(action, "showuser")) {
1660                 showuser();
1661         } else if (!strcasecmp(action, "display_page")) {
1662                 display_page();
1663         } else if (!strcasecmp(action, "page_user")) {
1664                 page_user();
1665         } else if (!strcasecmp(action, "chat")) {
1666                 do_chat();
1667         } else if (!strcasecmp(action, "display_private")) {
1668                 display_private("", 0);
1669         } else if (!strcasecmp(action, "goto_private")) {
1670                 goto_private();
1671         } else if (!strcasecmp(action, "zapped_list")) {
1672                 zapped_list();
1673         } else if (!strcasecmp(action, "display_zap")) {
1674                 display_zap();
1675         } else if (!strcasecmp(action, "zap")) {
1676                 zap();
1677         } else if (!strcasecmp(action, "display_entroom")) {
1678                 display_entroom();
1679         } else if (!strcasecmp(action, "entroom")) {
1680                 entroom();
1681         } else if (!strcasecmp(action, "display_whok")) {
1682                 display_whok();
1683         } else if (!strcasecmp(action, "do_invt_kick")) {
1684                 do_invt_kick();
1685         } else if (!strcasecmp(action, "display_editroom")) {
1686                 display_editroom();
1687         } else if (!strcasecmp(action, "netedit")) {
1688                 netedit();
1689         } else if (!strcasecmp(action, "editroom")) {
1690                 editroom();
1691         } else if (!strcasecmp(action, "display_editinfo")) {
1692                 display_edit(_("Room info"), "EINF 0", "RINF", "editinfo", 1);
1693         } else if (!strcasecmp(action, "editinfo")) {
1694                 save_edit(_("Room info"), "EINF 1", 1);
1695         } else if (!strcasecmp(action, "display_editbio")) {
1696                 snprintf(buf, SIZ, "RBIO %s", WC->wc_fullname);
1697                 display_edit(_("Your bio"), "NOOP", buf, "editbio", 3);
1698         } else if (!strcasecmp(action, "editbio")) {
1699                 save_edit(_("Your bio"), "EBIO", 0);
1700         } else if (!strcasecmp(action, "confirm_move_msg")) {
1701                 confirm_move_msg();
1702         } else if (!strcasecmp(action, "delete_room")) {
1703                 delete_room();
1704         } else if (!strcasecmp(action, "validate")) {
1705                 validate();
1706                 /* The users photo display / upload facility */
1707         } else if (!strcasecmp(action, "display_editpic")) {
1708                 display_graphics_upload(_("your photo"),
1709                                         "UIMG 0|_userpic_",
1710                                         "editpic");
1711         } else if (!strcasecmp(action, "editpic")) {
1712                 do_graphics_upload("UIMG 1|_userpic_");
1713                 /* room picture dispay / upload facility */
1714         } else if (!strcasecmp(action, "display_editroompic")) {
1715                 display_graphics_upload(_("the icon for this room"),
1716                                         "UIMG 0|_roompic_",
1717                                         "editroompic");
1718         } else if (!strcasecmp(action, "editroompic")) {
1719                 do_graphics_upload("UIMG 1|_roompic_");
1720                 /* the greetingpage hello pic */
1721         } else if (!strcasecmp(action, "display_edithello")) {
1722                 display_graphics_upload(_("the Greetingpicture for the login prompt"),
1723                                         "UIMG 0|hello.gif",
1724                                         "edithellopic");
1725         } else if (!strcasecmp(action, "edithellopic")) {
1726                 do_graphics_upload("UIMG 1|hello.gif");
1727                 /* the logoff banner */
1728         } else if (!strcasecmp(action, "display_editgoodbyepic")) {
1729                 display_graphics_upload(_("the Logoff banner picture"),
1730                                         "UIMG 0|goodbuye.gif",
1731                                         "editgoodbuyepic");
1732         } else if (!strcasecmp(action, "editgoodbuyepic")) {
1733                 do_graphics_upload("UIMG 1|goodbuye.gif");
1734
1735         } else if (!strcasecmp(action, "delete_floor")) {
1736                 delete_floor();
1737         } else if (!strcasecmp(action, "rename_floor")) {
1738                 rename_floor();
1739         } else if (!strcasecmp(action, "create_floor")) {
1740                 create_floor();
1741         } else if (!strcasecmp(action, "display_editfloorpic")) {
1742                 snprintf(buf, SIZ, "UIMG 0|_floorpic_|%s",
1743                         bstr("which_floor"));
1744                 display_graphics_upload(_("the icon for this floor"),
1745                                         buf,
1746                                         "editfloorpic");
1747         } else if (!strcasecmp(action, "editfloorpic")) {
1748                 snprintf(buf, SIZ, "UIMG 1|_floorpic_|%s",
1749                         bstr("which_floor"));
1750                 do_graphics_upload(buf);
1751         } else if (!strcasecmp(action, "display_reg")) {
1752                 display_reg(0);
1753         } else if (!strcasecmp(action, "display_changepw")) {
1754                 display_changepw();
1755         } else if (!strcasecmp(action, "changepw")) {
1756                 changepw();
1757         } else if (!strcasecmp(action, "display_edit_node")) {
1758                 display_edit_node();
1759         } else if (!strcasecmp(action, "edit_node")) {
1760                 edit_node();
1761         } else if (!strcasecmp(action, "display_netconf")) {
1762                 display_netconf();
1763         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
1764                 display_confirm_delete_node();
1765         } else if (!strcasecmp(action, "delete_node")) {
1766                 delete_node();
1767         } else if (!strcasecmp(action, "display_add_node")) {
1768                 display_add_node();
1769         } else if (!strcasecmp(action, "terminate_session")) {
1770                 slrp_highest();
1771                 terminate_session();
1772         } else if (!strcasecmp(action, "edit_me")) {
1773                 edit_me();
1774         } else if (!strcasecmp(action, "display_siteconfig")) {
1775                 display_siteconfig();
1776         } else if (!strcasecmp(action, "chat_recv")) {
1777                 chat_recv();
1778         } else if (!strcasecmp(action, "chat_send")) {
1779                 chat_send();
1780         } else if (!strcasecmp(action, "siteconfig")) {
1781                 siteconfig();
1782         } else if (!strcasecmp(action, "display_generic")) {
1783                 display_generic();
1784         } else if (!strcasecmp(action, "do_generic")) {
1785                 do_generic();
1786         } else if (!strcasecmp(action, "ajax_servcmd")) {
1787                 ajax_servcmd();
1788         } else if (!strcasecmp(action, "display_menubar")) {
1789                 display_menubar(1);
1790         } else if (!strcasecmp(action, "mimepart")) {
1791                 mimepart(index[1], index[2], 0);
1792         } else if (!strcasecmp(action, "mimepart_download")) {
1793                 mimepart(index[1], index[2], 1);
1794         } else if (!strcasecmp(action, "edit_vcard")) {
1795                 edit_vcard();
1796         } else if (!strcasecmp(action, "submit_vcard")) {
1797                 submit_vcard();
1798         } else if (!strcasecmp(action, "select_user_to_edit")) {
1799                 select_user_to_edit(NULL, NULL);
1800         } else if (!strcasecmp(action, "display_edituser")) {
1801                 display_edituser(NULL, 0);
1802         } else if (!strcasecmp(action, "edituser")) {
1803                 edituser();
1804         } else if (!strcasecmp(action, "create_user")) {
1805                 create_user();
1806         } else if (!strcasecmp(action, "changeview")) {
1807                 change_view();
1808         } else if (!strcasecmp(action, "change_start_page")) {
1809                 change_start_page();
1810         } else if (!strcasecmp(action, "display_floorconfig")) {
1811                 display_floorconfig(NULL);
1812         } else if (!strcasecmp(action, "toggle_self_service")) {
1813                 toggle_self_service();
1814 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1815         } else if (!strcasecmp(action, "display_edit_task")) {
1816                 display_edit_task();
1817         } else if (!strcasecmp(action, "save_task")) {
1818                 save_task();
1819         } else if (!strcasecmp(action, "display_edit_event")) {
1820                 display_edit_event();
1821         } else if (!strcasecmp(action, "save_event")) {
1822                 save_event();
1823         } else if (!strcasecmp(action, "respond_to_request")) {
1824                 respond_to_request();
1825         } else if (!strcasecmp(action, "handle_rsvp")) {
1826                 handle_rsvp();
1827 #endif
1828         } else if (!strcasecmp(action, "summary")) {
1829                 summary();
1830         } else if (!strcasecmp(action, "summary_inner_div")) {
1831                 begin_ajax_response();
1832                 summary_inner_div();
1833                 end_ajax_response();
1834         } else if (!strcasecmp(action, "display_customize_iconbar")) {
1835                 display_customize_iconbar();
1836         } else if (!strcasecmp(action, "commit_iconbar")) {
1837                 commit_iconbar();
1838         } else if (!strcasecmp(action, "set_room_policy")) {
1839                 set_room_policy();
1840         } else if (!strcasecmp(action, "display_inetconf")) {
1841                 display_inetconf();
1842         } else if (!strcasecmp(action, "save_inetconf")) {
1843                 save_inetconf();
1844         } else if (!strcasecmp(action, "display_smtpqueue")) {
1845                 display_smtpqueue();
1846         } else if (!strcasecmp(action, "display_smtpqueue_inner_div")) {
1847                 display_smtpqueue_inner_div();
1848         } else if (!strcasecmp(action, "display_sieve")) {
1849                 display_sieve();
1850         } else if (!strcasecmp(action, "save_sieve")) {
1851                 save_sieve();
1852         } else if (!strcasecmp(action, "display_pushemail")) {
1853                 display_pushemail();
1854         } else if (!strcasecmp(action, "save_pushemail")) {
1855                 save_pushemail();
1856         } else if (!strcasecmp(action, "display_add_remove_scripts")) {
1857                 display_add_remove_scripts(NULL);
1858         } else if (!strcasecmp(action, "create_script")) {
1859                 create_script();
1860         } else if (!strcasecmp(action, "delete_script")) {
1861                 delete_script();
1862         } else if (!strcasecmp(action, "setup_wizard")) {
1863                 do_setup_wizard();
1864         } else if (!strcasecmp(action, "display_preferences")) {
1865                 display_preferences();
1866         } else if (!strcasecmp(action, "set_preferences")) {
1867                 set_preferences();
1868         } else if (!strcasecmp(action, "recp_autocomplete")) {
1869                 recp_autocomplete(bstr("recp"));
1870         } else if (!strcasecmp(action, "cc_autocomplete")) {
1871                 recp_autocomplete(bstr("cc"));
1872         } else if (!strcasecmp(action, "bcc_autocomplete")) {
1873                 recp_autocomplete(bstr("bcc"));
1874         } else if (!strcasecmp(action, "display_address_book_middle_div")) {
1875                 display_address_book_middle_div();
1876         } else if (!strcasecmp(action, "display_address_book_inner_div")) {
1877                 display_address_book_inner_div();
1878         } else if (!strcasecmp(action, "set_floordiv_expanded")) {
1879                 set_floordiv_expanded(index[1]);
1880         } else if (!strcasecmp(action, "diagnostics")) {
1881                 output_headers(1, 1, 1, 0, 0, 0);
1882                 wprintf("Session: %d<hr />\n", WC->wc_session);
1883                 wprintf("Command: <br /><PRE>\n");
1884                 escputs(cmd);
1885                 wprintf("</PRE><hr />\n");
1886                 wprintf("Variables: <br /><PRE>\n");
1887                 dump_vars();
1888                 wprintf("</PRE><hr />\n");
1889                 wDumpContent(1);
1890         } else if (!strcasecmp(action, "updatenote")) {
1891                 updatenote();
1892         } else if (!strcasecmp(action, "display_room_directory")) {
1893                 display_room_directory();
1894         } else if (!strcasecmp(action, "download_file")) {
1895                 download_file(index[1]);
1896         } else if (!strcasecmp(action, "upload_file")) {
1897                 upload_file();
1898         }
1899
1900         /** When all else fais, display the main menu. */
1901         else {
1902                 display_main_menu();
1903         }
1904
1905 SKIP_ALL_THIS_CRAP:
1906         fflush(stdout);
1907         if (content != NULL) {
1908                 free(content);
1909                 content = NULL;
1910         }
1911         free_urls();
1912         if (WC->upload_length > 0) {
1913                 free(WC->upload);
1914                 WC->upload_length = 0;
1915         }
1916 }
1917
1918 /**
1919  * \brief Replacement for sleep() that uses select() in order to avoid SIGALRM
1920  * \param seconds how many seconds should we sleep?
1921  */
1922 void sleeeeeeeeeep(int seconds)
1923 {
1924         struct timeval tv;
1925
1926         tv.tv_sec = seconds;
1927         tv.tv_usec = 0;
1928         select(0, NULL, NULL, NULL, &tv);
1929 }
1930
1931
1932 /*@}*/