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         for (a = 0; a < buflen; ++a) {
  43                 if (buf[a] == '+')
  44                         buf[a] = ' ';
  45                 if (buf[a] == '%') {
  46                         hex[0] = buf[a + 1];
  47                         hex[1] = buf[a + 2];
  48                         hex[2] = 0;
  49                         b = 0;
  50                         sscanf(hex, "%02x", &b);
  51                         buf[a] = (char) b;
  52                         memmove(&buf[a + 1], &buf[a + 3], buflen - a - 2);
  53
  54                         buflen -=2;
  55                 }
  56         }
  57
  58 }
  59
  60 /**
  61  * \brief Extract variables from the URL.
  62  * \param url URL supplied by the HTTP parser
  63  */
  64 void addurls(char *url)
  65 {
  66         char *up, *ptr;
  67         char buf[SIZ];
  68         int a, b, len;
  69         struct urlcontent *u;
  70
  71         up = url;
  72         while (!IsEmptyStr(up)) {
  73
  74                 /** locate the = sign */
  75                 safestrncpy(buf, up, sizeof buf);
  76                 b = (-1);
  77                 for (a = 255; a >= 0; --a)
  78                         if (buf[a] == '=')
  79                                 b = a;
  80                 if (b < 0)
  81                         return;
  82                 buf[b] = 0;
  83
  84                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
  85                 u->next = WC->urlstrings;
  86                 WC->urlstrings = u;
  87                 safestrncpy(u->url_key, buf, sizeof u->url_key);
  88
  89                 /** now chop that part off */
  90                 for (a = 0; a <= b; ++a)
  91                         ++up;
  92
  93                 /** locate "&" and "?" delimiters */
  94                 ptr = up;
  95                 len = b = strlen(up);
  96                 for (a = 0; a < len; ++a) {
  97                         if ( (ptr[0] == '&') || (ptr[0] == '?') ) {
  98                                 b = a;
  99                                 break;
 100                         }
 101                         ++ptr;
 102                 }
 103                 ptr = up + b;
 104                 *ptr = '\0';
 105
 106                 len = b;
 107                 u->url_data = malloc(len + 2);
 108                 safestrncpy(u->url_data, up, b + 1);
 109                 u->url_data[b] = 0;
 110                 unescape_input(u->url_data);
 111                 up = ptr;
 112                 ++up;
 113
 114                 /* lprintf(9, "%s = %s\n", u->url_key, u->url_data); */
 115         }
 116 }
 117
 118 /**
 119  * \brief free urlstring memory
 120  */
 121 void free_urls(void)
 122 {
 123         struct urlcontent *u;
 124
 125         while (WC->urlstrings != NULL) {
 126                 free(WC->urlstrings->url_data);
 127                 u = WC->urlstrings->next;
 128                 free(WC->urlstrings);
 129                 WC->urlstrings = u;
 130         }
 131 }
 132
 133 /**
 134  * \brief Diagnostic function to display the contents of all variables
 135  */
 136 void dump_vars(void)
 137 {
 138         struct urlcontent *u;
 139
 140         for (u = WC->urlstrings; u != NULL; u = u->next) {
 141                 wprintf("%38s = %s\n", u->url_key, u->url_data);
 142         }
 143 }
 144
 145 /**
 146  * \brief Return the value of a variable supplied to the current web page (from the url or a form)
 147  * \param key The name of the variable we want
 148  */
 149 char *bstr(char *key)
 150 {
 151         struct urlcontent *u;
 152
 153         for (u = WC->urlstrings; u != NULL; u = u->next) {
 154                 if (!strcasecmp(u->url_key, key))
 155                         return (u->url_data);
 156         }
 157         return ("");
 158 }
 159
 160 /**
 161  * \brief web-printing funcion. uses our vsnprintf wrapper
 162  * \param format printf format string
 163  * \param ... the varargs to put into formatstring
 164  */
 165 void wprintf(const char *format,...)
 166 {
 167         va_list arg_ptr;
 168         char wbuf[4096];
 169
 170         va_start(arg_ptr, format);
 171         vsnprintf(wbuf, sizeof wbuf, format, arg_ptr);
 172         va_end(arg_ptr);
 173
 174         client_write(wbuf, strlen(wbuf));
 175 }
 176
 177
 178 /**
 179  * \brief wrap up an HTTP session, closes tags, etc.
 180  * \todo multiline params?
 181  * \param print_standard_html_footer should be set to 0 to transmit only, 1 to
 182  * append the main menu and closing tags, or 2 to
 183  * append the closing tags only.
 184  */
 185 void wDumpContent(int print_standard_html_footer)
 186 {
 187         if (print_standard_html_footer) {
 188                 wprintf("</div>\n");    /* end of "text" div */
 189                 do_template("trailing");
 190         }
 191
 192         /* If we've been saving it all up for one big output burst,
 193          * go ahead and do that now.
 194          */
 195         end_burst();
 196 }
 197
 198
 199 /**
 200  * \brief Copy a string, escaping characters which have meaning in HTML.
 201  * \param target target buffer
 202  * \param strbuf source buffer
 203  * \param nbsp If nonzero, spaces are converted to non-breaking spaces.
 204  * \param nolinebreaks if set, linebreaks are removed from the string.
 205  */
 206 long stresc(char *target, long tSize, char *strbuf, int nbsp, int nolinebreaks)
 207 {
 208         char *aptr, *bptr, *eptr;
 209
 210         *target = '\0';
 211         aptr = strbuf;
 212         bptr = target;
 213         eptr = target + tSize - 6; // our biggest unit to put in...
 214
 215         while ((bptr < eptr) && !IsEmptyStr(aptr) ){
 216                 if (*aptr == '<') {
 217                         memcpy(bptr, "&lt;", 4);
 218                         bptr += 4;
 219                 }
 220                 else if (*aptr == '>') {
 221                         memcpy(bptr, "&gt;", 4);
 222                         bptr += 4;
 223                 }
 224                 else if (*aptr == '&') {
 225                         memcpy(bptr, "&amp;", 5);
 226                         bptr += 5;
 227                 }
 228                 else if (*aptr == '\"') {
 229                         memcpy(bptr, "&quot;", 6);
 230                         bptr += 6;
 231                 }
 232                 else if (*aptr == '\'') {
 233                         memcpy(bptr, "&#39;", 5);
 234                         bptr += 5;
 235                 }
 236                 else if (*aptr == LB) {
 237                         *bptr = '<';
 238                         bptr ++;
 239                 }
 240                 else if (*aptr == RB) {
 241                         *bptr = '>';
 242                         bptr ++;
 243                 }
 244                 else if (*aptr == QU) {
 245                         *bptr ='"';
 246                         bptr ++;
 247                 }
 248                 else if ((*aptr == 32) && (nbsp == 1)) {
 249                         memcpy(bptr, "&nbsp;", 6);
 250                         bptr += 6;
 251                 }
 252                 else if ((*aptr == '\n') && (nolinebreaks)) {
 253                         *bptr='\0';     /* nothing */
 254                 }
 255                 else if ((*aptr == '\r') && (nolinebreaks)) {
 256                         *bptr='\0';     /* nothing */
 257                 }
 258                 else{
 259                         *bptr = *aptr;
 260                         bptr++;
 261                 }
 262                 aptr ++;
 263         }
 264         *bptr = '\0';
 265         if ((bptr = eptr - 1 ) && !IsEmptyStr(aptr) )
 266                 return -1;
 267         return (bptr - target);
 268 }
 269
 270 /**
 271  * \brief WHAT???
 272  * \param strbuf what???
 273  * \param nbsp If nonzero, spaces are converted to non-breaking spaces.
 274  * \param nolinebreaks if set, linebreaks are removed from the string.
 275  */
 276 void escputs1(char *strbuf, int nbsp, int nolinebreaks)
 277 {
 278         char *buf;
 279         long Siz;
 280
 281         if (strbuf == NULL) return;
 282         Siz = (3 * strlen(strbuf)) + SIZ ;
 283         buf = malloc(Siz);
 284         stresc(buf, Siz, strbuf, nbsp, nolinebreaks);
 285         wprintf("%s", buf);
 286         free(buf);
 287 }
 288
 289 /**
 290  * \brief static wrapper for ecsputs1
 291  * \param strbuf buffer to print escaped to client
 292  */
 293 void escputs(char *strbuf)
 294 {
 295         escputs1(strbuf, 0, 0);
 296 }
 297
 298 /**
 299  * \brief Escape a string for feeding out as a URL.
 300  * \param outbuf the output buffer
 301  * \param strbuf the input buffer
 302  */
 303 void urlesc(char *outbuf, char *strbuf)
 304 {
 305         int a, b, c, len, eclen, olen;
 306         char *ec = " +#&;`'|*?-~<>^()[]{}/$\"\\";
 307
 308         strcpy(outbuf, "");
 309         len = strlen(strbuf);
 310         eclen = strlen(ec);
 311         olen = 0;
 312         for (a = 0; a < len; ++a) {
 313                 c = 0;
 314                 for (b = 0; b < eclen; ++b) {
 315                         if (strbuf[a] == ec[b])
 316                                 c = 1;
 317                 }
 318                 if (c == 1) {
 319                         sprintf(&outbuf[olen], "%%%02x", strbuf[a]);
 320                         olen += 3;
 321                 }
 322                 else
 323                         outbuf[olen ++] = strbuf[a];
 324         }
 325         outbuf[olen] = '\0';
 326 }
 327
 328 /**
 329  * \brief urlescape buffer and print it to the client
 330  * \param strbuf buffer to urlescape
 331  */
 332 void urlescputs(char *strbuf)
 333 {
 334         char outbuf[SIZ];
 335
 336         urlesc(outbuf, strbuf);
 337         wprintf("%s", outbuf);
 338 }
 339
 340
 341 /**
 342  * \brief Copy a string, escaping characters for JavaScript strings.
 343  * \param target output string
 344  * \param strbuf input string
 345  */
 346 void jsesc(char *target, char *strbuf)
 347 {
 348         int a, len;
 349
 350         target[0]='\0';
 351         len = strlen (strbuf);
 352         for (a = 0; a < len; ++a) {
 353                 if (strbuf[a] == '<')
 354                         strcat(target, "[");
 355                 else if (strbuf[a] == '>')
 356                         strcat(target, "]");
 357                 else if (strbuf[a] == '\"')
 358                         strcat(target, "&quot;");
 359                 else if (strbuf[a] == '&')
 360                         strcat(target, "&amp;;");
 361                 else if (strbuf[a] == '\'')
 362                         strcat(target, "\\'");
 363                 else {
 364                         strncat(target, &strbuf[a], 1);
 365                 }
 366         }
 367 }
 368
 369 /**
 370  * \brief escape and print java script
 371  * \param strbuf the js code
 372  */
 373 void jsescputs(char *strbuf)
 374 {
 375         char outbuf[SIZ];
 376
 377         jsesc(outbuf, strbuf);
 378         wprintf("%s", outbuf);
 379 }
 380
 381 /**
 382  * \brief Copy a string, escaping characters for message text hold
 383  * \param target target buffer
 384  * \param strbuf source buffer
 385  */
 386 void msgesc(char *target, char *strbuf)
 387 {
 388         int a, len;
 389
 390         *target='\0';
 391         len = strlen(strbuf);
 392         for (a = 0; a < len; ++a) {
 393                 if (strbuf[a] == '\n')
 394                         strcat(target, " ");
 395                 else if (strbuf[a] == '\r')
 396                         strcat(target, " ");
 397                 else if (strbuf[a] == '\'')
 398                         strcat(target, "&#39;");
 399                 else {
 400                         strncat(target, &strbuf[a], 1);
 401                 }
 402         }
 403 }
 404
 405 /**
 406  * \brief print a string to the client after cleaning it with msgesc() and stresc()
 407  * \param strbuf string to be printed
 408  */
 409 void msgescputs1( char *strbuf)
 410 {
 411         char *outbuf;
 412         char *outbuf2;
 413         int buflen;
 414
 415         if (strbuf == NULL) return;
 416         buflen = 3 * strlen(strbuf) + SIZ;
 417         outbuf = malloc( buflen);
 418         outbuf2 = malloc( buflen);
 419         msgesc(outbuf, strbuf);
 420         stresc(outbuf2, buflen, outbuf, 0, 0);
 421         wprintf("%s", outbuf2);
 422         free(outbuf);
 423         free(outbuf2);
 424 }
 425
 426 /**
 427  * \brief print a string to the client after cleaning it with msgesc()
 428  * \param strbuf string to be printed
 429  */
 430 void msgescputs(char *strbuf) {
 431         char *outbuf;
 432
 433         if (strbuf == NULL) return;
 434         outbuf = malloc( (3 * strlen(strbuf)) + SIZ);
 435         msgesc(outbuf, strbuf);
 436         wprintf("%s", outbuf);
 437         free(outbuf);
 438 }
 439
 440
 441
 442
 443 /**
 444  * \brief Output all that important stuff that the browser will want to see
 445  */
 446 void output_headers(    int do_httpheaders,     /**< 1 = output HTTP headers                          */
 447                         int do_htmlhead,        /**< 1 = output HTML <head> section and <body> opener */
 448
 449                         int do_room_banner,     /**< 0=no, 1=yes,
 450                                                                  * 2 = I'm going to embed my own, so don't open the
 451                                                                  *     <div id="content"> either.
 452                                                                  */
 453
 454                         int unset_cookies,      /**< 1 = session is terminating, so unset the cookies */
 455                         int suppress_check,     /**< 1 = suppress check for instant messages          */
 456                         int cache               /**< 1 = allow browser to cache this page             */
 457 ) {
 458         char cookie[1024];
 459         char httpnow[128];
 460
 461         wprintf("HTTP/1.1 200 OK\n");
 462         http_datestring(httpnow, sizeof httpnow, time(NULL));
 463
 464         if (do_httpheaders) {
 465                 wprintf("Content-type: text/html; charset=utf-8\r\n"
 466                         "Server: %s / %s\n"
 467                         "Connection: close\r\n",
 468                         PACKAGE_STRING, serv_info.serv_software
 469                 );
 470         }
 471
 472         if (cache) {
 473                 wprintf("Pragma: public\r\n"
 474                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 475                         "Last-modified: %s\r\n",
 476                         httpnow
 477                 );
 478         }
 479         else {
 480                 wprintf("Pragma: no-cache\r\n"
 481                         "Cache-Control: no-store\r\n"
 482                         "Expires: -1\r\n"
 483                 );
 484         }
 485
 486         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 487                         WC->wc_password, WC->wc_roomname);
 488
 489         if (unset_cookies) {
 490                 wprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 491         } else {
 492                 wprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 493                 if (server_cookie != NULL) {
 494                         wprintf("%s\n", server_cookie);
 495                 }
 496         }
 497
 498         if (do_htmlhead) {
 499                 begin_burst();
 500                 if (!access("static.local/webcit.css", R_OK)) {
 501                         svprintf("CSSLOCAL", WCS_STRING,
 502                            "<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\">"
 503                         );
 504                 }
 505                 do_template("head");
 506         }
 507
 508         /** ICONBAR */
 509         if (do_htmlhead) {
 510
 511
 512                 /** check for ImportantMessages (these display in a div overlaying the main screen) */
 513                 if (!IsEmptyStr(WC->ImportantMessage)) {
 514                         wprintf("<div id=\"important_message\">\n");
 515                         wprintf("<span class=\"imsg\">"
 516                                 "%s</span><br />\n", WC->ImportantMessage);
 517                         wprintf("</div>\n");
 518                         wprintf("<script type=\"text/javascript\">\n"
 519                                 "        setTimeout('hide_imsg_popup()', 3000); \n"
 520                                 "</script>\n");
 521                         safestrncpy(WC->ImportantMessage, "", sizeof WC->ImportantMessage);
 522                 }
 523
 524                 if ( (WC->logged_in) && (!unset_cookies) ) {
 525                         wprintf("<div id=\"iconbar\">");
 526                         do_selected_iconbar();
 527                         /** check for instant messages (these display in a new window) */
 528                         page_popup();
 529                         wprintf("</div>");
 530                 }
 531
 532                 if (do_room_banner == 1) {
 533                         wprintf("<div id=\"banner\">\n");
 534                         embed_room_banner(NULL, navbar_default);
 535                         wprintf("</div>\n");
 536                 }
 537         }
 538
 539         if (do_room_banner == 1) {
 540                 wprintf("<div id=\"content\">\n");
 541         }
 542 }
 543
 544
 545 /**
 546  * \brief Generic function to do an HTTP redirect.  Easy and fun.
 547  * \param whichpage target url to 302 to
 548  */
 549 void http_redirect(char *whichpage) {
 550         wprintf("HTTP/1.1 302 Moved Temporarily\n");
 551         wprintf("Location: %s\r\n", whichpage);
 552         wprintf("URI: %s\r\n", whichpage);
 553         wprintf("Content-type: text/html; charset=utf-8\r\n\r\n");
 554         wprintf("<html><body>");
 555         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 556         wprintf("</body></html>\n");
 557 }
 558
 559
 560
 561 /**
 562  * \brief Output a piece of content to the web browser
 563  */
 564 void http_transmit_thing(char *thing, size_t length, char *content_type,
 565                          int is_static) {
 566
 567         output_headers(0, 0, 0, 0, 0, is_static);
 568
 569         wprintf("Content-type: %s\r\n"
 570                 "Server: %s\r\n"
 571                 "Connection: close\r\n",
 572                 content_type,
 573                 PACKAGE_STRING);
 574
 575 #ifdef HAVE_ZLIB
 576         /** If we can send the data out compressed, please do so. */
 577         if (WC->gzip_ok) {
 578                 char *compressed_data = NULL;
 579                 uLongf compressed_len;
 580
 581                 compressed_len = (uLongf) ((length * 101) / 100) + 100;
 582                 compressed_data = malloc(compressed_len);
 583
 584                 if (compress_gzip((Bytef *) compressed_data,
 585                                   &compressed_len,
 586                                   (Bytef *) thing,
 587                                   (uLongf) length, Z_BEST_SPEED) == Z_OK) {
 588                         wprintf("Content-encoding: gzip\r\n"
 589                                 "Content-length: %ld\r\n"
 590                                 "\r\n",
 591                                 (long) compressed_len
 592                         );
 593                         client_write(compressed_data, (size_t)compressed_len);
 594                         free(compressed_data);
 595                         return;
 596                 }
 597         }
 598 #endif
 599
 600         /** No compression ... just send it out as-is */
 601         wprintf("Content-length: %ld\r\n"
 602                 "\r\n",
 603                 (long) length
 604         );
 605         client_write(thing, (size_t)length);
 606 }
 607
 608 /**
 609  * \brief print menu box like used in the floor view or admin interface.
 610  * This function takes pair of strings as va_args,
 611  * \param Title Title string of the box
 612  * \param Class CSS Class for the box
 613  * \param nLines How many string pairs should we print? (URL, UrlText)
 614  * \param ... Pairs of URL Strings and their Names
 615  */
 616 void print_menu_box(char* Title, char *Class, int nLines, ...)
 617 {
 618         va_list arg_list;
 619         long i;
 620
 621         svprintf("BOXTITLE", WCS_STRING, Title);
 622         do_template("beginbox");
 623
 624         wprintf("<ul class=\"%s\">", Class);
 625
 626         va_start(arg_list, nLines);
 627         for (i = 0; i < nLines; ++i)
 628         {
 629                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 630                 wprintf((char *) va_arg(arg_list, char *));
 631                 wprintf("</a></li>\n");
 632         }
 633         va_end (arg_list);
 634
 635         wprintf("</a></li>\n");
 636
 637         wprintf("</ul>");
 638
 639         do_template("endbox");
 640 }
 641
 642
 643 /**
 644  * \brief dump out static pages from disk
 645  * \param what the file urs to print
 646  */
 647 void output_static(char *what)
 648 {
 649         FILE *fp;
 650         struct stat statbuf;
 651         off_t bytes;
 652         char *bigbuffer;
 653         char content_type[128];
 654         int len;
 655
 656         fp = fopen(what, "rb");
 657         if (fp == NULL) {
 658                 lprintf(9, "output_static('%s')  -- NOT FOUND --\n", what);
 659                 wprintf("HTTP/1.1 404 %s\n", strerror(errno));
 660                 wprintf("Content-Type: text/plain\r\n");
 661                 wprintf("\r\n");
 662                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 663         } else {
 664                 len = strlen (what);
 665                 if (!strncasecmp(&what[len - 4], ".gif", 4))
 666                         safestrncpy(content_type, "image/gif", sizeof content_type);
 667                 else if (!strncasecmp(&what[len - 4], ".txt", 4))
 668                         safestrncpy(content_type, "text/plain", sizeof content_type);
 669                 else if (!strncasecmp(&what[len - 4], ".css", 4))
 670                         safestrncpy(content_type, "text/css", sizeof content_type);
 671                 else if (!strncasecmp(&what[len - 4], ".jpg", 4))
 672                         safestrncpy(content_type, "image/jpeg", sizeof content_type);
 673                 else if (!strncasecmp(&what[len - 4], ".png", 4))
 674                         safestrncpy(content_type, "image/png", sizeof content_type);
 675                 else if (!strncasecmp(&what[len - 4], ".ico", 4))
 676                         safestrncpy(content_type, "image/x-icon", sizeof content_type);
 677                 else if (!strncasecmp(&what[len - 5], ".html", 5))
 678                         safestrncpy(content_type, "text/html", sizeof content_type);
 679                 else if (!strncasecmp(&what[len - 4], ".htm", 4))
 680                         safestrncpy(content_type, "text/html", sizeof content_type);
 681                 else if (!strncasecmp(&what[len - 4], ".wml", 4))
 682                         safestrncpy(content_type, "text/vnd.wap.wml", sizeof content_type);
 683                 else if (!strncasecmp(&what[len - 5], ".wmls", 5))
 684                         safestrncpy(content_type, "text/vnd.wap.wmlscript", sizeof content_type);
 685                 else if (!strncasecmp(&what[len - 5], ".wmlc", 5))
 686                         safestrncpy(content_type, "application/vnd.wap.wmlc", sizeof content_type);
 687                 else if (!strncasecmp(&what[len - 6], ".wmlsc", 6))
 688                         safestrncpy(content_type, "application/vnd.wap.wmlscriptc", sizeof content_type);
 689                 else if (!strncasecmp(&what[len - 5], ".wbmp", 5))
 690                         safestrncpy(content_type, "image/vnd.wap.wbmp", sizeof content_type);
 691                 else if (!strncasecmp(&what[len - 3], ".js", 3))
 692                         safestrncpy(content_type, "text/javascript", sizeof content_type);
 693                 else
 694                         safestrncpy(content_type, "application/octet-stream", sizeof content_type);
 695
 696                 fstat(fileno(fp), &statbuf);
 697                 bytes = statbuf.st_size;
 698                 bigbuffer = malloc(bytes + 2);
 699                 fread(bigbuffer, bytes, 1, fp);
 700                 fclose(fp);
 701
 702                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
 703                 http_transmit_thing(bigbuffer, (size_t)bytes, content_type, 1);
 704                 free(bigbuffer);
 705         }
 706         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 707                 end_webcit_session();
 708         }
 709 }
 710
 711
 712 /**
 713  * \brief When the browser requests an image file from the Citadel server,
 714  * this function is called to transmit it.
 715  */
 716 void output_image()
 717 {
 718         char buf[SIZ];
 719         char *xferbuf = NULL;
 720         off_t bytes;
 721
 722         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 723         serv_getln(buf, sizeof buf);
 724         if (buf[0] == '2') {
 725                 bytes = extract_long(&buf[4], 0);
 726                 xferbuf = malloc(bytes + 2);
 727
 728                 /** Read it from the server */
 729                 read_server_binary(xferbuf, bytes);
 730                 serv_puts("CLOS");
 731                 serv_getln(buf, sizeof buf);
 732
 733                 /** Write it to the browser */
 734                 http_transmit_thing(xferbuf, (size_t)bytes, "image/gif", 0);
 735                 free(xferbuf);
 736
 737         } else {
 738                 /**
 739                  * Instead of an ugly 404, send a 1x1 transparent GIF
 740                  * when there's no such image on the server.
 741                  */
 742                 char blank_gif[SIZ];
 743                 snprintf (blank_gif, SIZ, "%s%s", static_dirs[0], "/blank.gif");
 744                 output_static(blank_gif);
 745         }
 746
 747
 748
 749 }
 750
 751 /**
 752  * \brief Generic function to output an arbitrary MIME part from an arbitrary
 753  *        message number on the server.
 754  *
 755  * \param msgnum                Number of the item on the citadel server
 756  * \param partnum               The MIME part to be output
 757  * \param force_download        Nonzero to force set the Content-Type: header
 758  *                              to "application/octet-stream"
 759  */
 760 void mimepart(char *msgnum, char *partnum, int force_download)
 761 {
 762         char buf[256];
 763         off_t bytes;
 764         char content_type[256];
 765         char *content = NULL;
 766
 767         serv_printf("OPNA %s|%s", msgnum, partnum);
 768         serv_getln(buf, sizeof buf);
 769         if (buf[0] == '2') {
 770                 bytes = extract_long(&buf[4], 0);
 771                 content = malloc(bytes + 2);
 772                 if (force_download) {
 773                         strcpy(content_type, "application/octet-stream");
 774                 }
 775                 else {
 776                         extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
 777                 }
 778                 output_headers(0, 0, 0, 0, 0, 0);
 779                 read_server_binary(content, bytes);
 780                 serv_puts("CLOS");
 781                 serv_getln(buf, sizeof buf);
 782                 http_transmit_thing(content, bytes, content_type, 0);
 783                 free(content);
 784         } else {
 785                 wprintf("HTTP/1.1 404 %s\n", &buf[4]);
 786                 output_headers(0, 0, 0, 0, 0, 0);
 787                 wprintf("Content-Type: text/plain\r\n");
 788                 wprintf("\r\n");
 789                 wprintf(_("An error occurred while retrieving this part: %s\n"), &buf[4]);
 790         }
 791
 792 }
 793
 794
 795 /**
 796  * \brief Read any MIME part of a message, from the server, into memory.
 797  * \param msgnum number of the message on the citadel server
 798  * \param partnum the MIME part to be loaded
 799  */
 800 char *load_mimepart(long msgnum, char *partnum)
 801 {
 802         char buf[SIZ];
 803         off_t bytes;
 804         char content_type[SIZ];
 805         char *content;
 806
 807         serv_printf("DLAT %ld|%s", msgnum, partnum);
 808         serv_getln(buf, sizeof buf);
 809         if (buf[0] == '6') {
 810                 bytes = extract_long(&buf[4], 0);
 811                 extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
 812
 813                 content = malloc(bytes + 2);
 814                 serv_read(content, bytes);
 815
 816                 content[bytes] = 0;     /* null terminate for good measure */
 817                 return(content);
 818         }
 819         else {
 820                 return(NULL);
 821         }
 822
 823 }
 824
 825
 826 /**
 827  * \brief Convenience functions to display a page containing only a string
 828  * \param titlebarcolor color of the titlebar of the frame
 829  * \param titlebarmsg text to display in the title bar
 830  * \param messagetext body of the box
 831  */
 832 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 833 {
 834         wprintf("HTTP/1.1 200 OK\n");
 835         output_headers(1, 1, 2, 0, 0, 0);
 836         wprintf("<div id=\"banner\">\n");
 837         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 838         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 839         wprintf("</td></tr></table>\n");
 840         wprintf("</div>\n<div id=\"content\">\n");
 841         escputs(messagetext);
 842
 843         wprintf("<hr />\n");
 844         wDumpContent(1);
 845 }
 846
 847
 848 /**
 849  * \brief Display a blank page.
 850  */
 851 void blank_page(void) {
 852         output_headers(1, 1, 0, 0, 0, 0);
 853         wDumpContent(2);
 854 }
 855
 856
 857 /**
 858  * \brief A template has been requested
 859  */
 860 void url_do_template(void) {
 861         do_template(bstr("template"));
 862 }
 863
 864
 865
 866 /**
 867  * \brief Offer to make any page the user's "start page."
 868  */
 869 void offer_start_page(void) {
 870         wprintf("<a href=\"change_start_page?startpage=");
 871         urlescputs(WC->this_page);
 872         wprintf("\">");
 873         wprintf(_("Make this my start page"));
 874         wprintf("</a>");
 875 /*
 876         wprintf("<br/><a href=\"rss?room=");
 877         urlescputs(WC->wc_roomname);
 878         wprintf("\" title=\"RSS 2.0 feed for ");
 879         escputs(WC->wc_roomname);
 880         wprintf("\"><img alt=\"RSS\" border=\"0\" src=\"static/xml_button.gif\"/></a>\n");
 881 */
 882 }
 883
 884
 885 /**
 886  * \brief Change the user's start page
 887  */
 888 void change_start_page(void) {
 889
 890         if (bstr("startpage") == NULL) {
 891                 safestrncpy(WC->ImportantMessage,
 892                         _("You no longer have a start page selected."),
 893                         sizeof WC->ImportantMessage);
 894                 display_main_menu();
 895                 return;
 896         }
 897
 898         set_preference("startpage", bstr("startpage"), 1);
 899
 900         output_headers(1, 1, 0, 0, 0, 0);
 901         do_template("newstartpage");
 902         wDumpContent(1);
 903 }
 904
 905
 906
 907 /**
 908  * \brief convenience function to indicate success
 909  * \param successmessage the mesage itself
 910  */
 911 void display_success(char *successmessage)
 912 {
 913         convenience_page("007700", "OK", successmessage);
 914 }
 915
 916
 917 /**
 918  * \brief Authorization required page
 919  * This is probably temporary and should be revisited
 920  * \param message message to put in header
 921 */
 922 void authorization_required(const char *message)
 923 {
 924         wprintf("HTTP/1.1 401 Authorization Required\r\n");
 925         wprintf("WWW-Authenticate: Basic realm=\"\"\r\n", serv_info.serv_humannode);
 926         wprintf("Content-Type: text/html\r\n\r\n");
 927         wprintf("<h1>");
 928         wprintf(_("Authorization Required"));
 929         wprintf("</h1>\r\n");
 930         wprintf(_("The resource you requested requires a valid username and password. "
 931                 "You could not be logged in: %s\n"), message);
 932         wDumpContent(0);
 933 }
 934
 935 /**
 936  * \brief This function is called by the MIME parser to handle data uploaded by
 937  *        the browser.  Form data, uploaded files, and the data from HTTP PUT
 938  *        operations (such as those found in GroupDAV) all arrive this way.
 939  *
 940  * \param name Name of the item being uploaded
 941  * \param filename Filename of the item being uploaded
 942  * \param partnum MIME part identifier (not needed)
 943  * \param disp MIME content disposition (not needed)
 944  * \param content The actual data
 945  * \param cbtype MIME content-type
 946  * \param cbcharset Character set
 947  * \param length Content length
 948  * \param encoding MIME encoding type (not needed)
 949  * \param userdata Not used here
 950  */
 951 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 952                         void *content, char *cbtype, char *cbcharset,
 953                         size_t length, char *encoding, void *userdata)
 954 {
 955         struct urlcontent *u;
 956
 957         lprintf(9, "upload_handler() name=%s, type=%s, len=%d\n", name, cbtype, length);
 958
 959         /* Form fields */
 960         if ( (length > 0) && (IsEmptyStr(cbtype)) ) {
 961                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
 962                 u->next = WC->urlstrings;
 963                 WC->urlstrings = u;
 964                 safestrncpy(u->url_key, name, sizeof(u->url_key));
 965                 u->url_data = malloc(length + 1);
 966                 memcpy(u->url_data, content, length);
 967                 u->url_data[length] = 0;
 968                 /* lprintf(9, "Key: <%s>  Data: <%s>\n", u->url_key, u->url_data); */
 969         }
 970
 971         /** Uploaded files */
 972         if ( (length > 0) && (!IsEmptyStr(cbtype)) ) {
 973                 WC->upload = malloc(length);
 974                 if (WC->upload != NULL) {
 975                         WC->upload_length = length;
 976                         safestrncpy(WC->upload_filename, filename,
 977                                         sizeof(WC->upload_filename));
 978                         safestrncpy(WC->upload_content_type, cbtype,
 979                                         sizeof(WC->upload_content_type));
 980                         memcpy(WC->upload, content, length);
 981                 }
 982                 else {
 983                         lprintf(3, "malloc() failed: %s\n", strerror(errno));
 984                 }
 985         }
 986
 987 }
 988
 989 /**
 990  * \brief Convenience functions to wrap around asynchronous ajax responses
 991  */
 992 void begin_ajax_response(void) {
 993         output_headers(0, 0, 0, 0, 0, 0);
 994
 995         wprintf("Content-type: text/html; charset=UTF-8\r\n"
 996                 "Server: %s\r\n"
 997                 "Connection: close\r\n"
 998                 "Pragma: no-cache\r\n"
 999                 "Cache-Control: no-cache\r\n"
1000                 "Expires: -1\r\n"
1001                 ,
1002                 PACKAGE_STRING);
1003         begin_burst();
1004 }
1005
1006 /**
1007  * \brief print ajax response footer
1008  */
1009 void end_ajax_response(void) {
1010         wprintf("\r\n");
1011         wDumpContent(0);
1012 }
1013
1014 /**
1015  * \brief Wraps a Citadel server command in an AJAX transaction.
1016  */
1017 void ajax_servcmd(void)
1018 {
1019         char buf[1024];
1020         char gcontent[1024];
1021         char *junk;
1022         size_t len;
1023
1024         begin_ajax_response();
1025
1026         serv_printf("%s", bstr("g_cmd"));
1027         serv_getln(buf, sizeof buf);
1028         wprintf("%s\n", buf);
1029
1030         if (buf[0] == '8') {
1031                 serv_printf("\n\n000");
1032         }
1033         if ((buf[0] == '1') || (buf[0] == '8')) {
1034                 while (serv_getln(gcontent, sizeof gcontent), strcmp(gcontent, "000")) {
1035                         wprintf("%s\n", gcontent);
1036                 }
1037                 wprintf("000");
1038         }
1039         if (buf[0] == '4') {
1040                 text_to_server(bstr("g_input"));
1041                 serv_puts("000");
1042         }
1043         if (buf[0] == '6') {
1044                 len = atol(&buf[4]);
1045                 junk = malloc(len);
1046                 serv_read(junk, len);
1047                 free(junk);
1048         }
1049         if (buf[0] == '7') {
1050                 len = atol(&buf[4]);
1051                 junk = malloc(len);
1052                 memset(junk, 0, len);
1053                 serv_write(junk, len);
1054                 free(junk);
1055         }
1056
1057         end_ajax_response();
1058
1059         /**
1060          * This is kind of an ugly hack, but this is the only place it can go.
1061          * If the command was GEXP, then the instant messenger window must be
1062          * running, so reset the "last_pager_check" watchdog timer so
1063          * that page_popup() doesn't try to open it a second time.
1064          */
1065         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
1066                 WC->last_pager_check = time(NULL);
1067         }
1068 }
1069
1070
1071 /**
1072  * \brief Helper function for the asynchronous check to see if we need
1073  * to open the instant messenger window.
1074  */
1075 void seconds_since_last_gexp(void)
1076 {
1077         char buf[256];
1078
1079         begin_ajax_response();
1080         if ( (time(NULL) - WC->last_pager_check) < 30) {
1081                 wprintf("NO\n");
1082         }
1083         else {
1084                 serv_puts("NOOP");
1085                 serv_getln(buf, sizeof buf);
1086                 if (buf[3] == '*') {
1087                         wprintf("YES");
1088                 }
1089                 else {
1090                         wprintf("NO");
1091                 }
1092         }
1093         end_ajax_response();
1094 }
1095
1096
1097
1098
1099 /**
1100  * \brief Entry point for WebCit transaction
1101  */
1102 void session_loop(struct httprequest *req)
1103 {
1104         char cmd[1024];
1105         char action[1024];
1106         char arg[8][128];
1107         size_t sizes[10];
1108         char *index[10];
1109         char buf[SIZ];
1110         char request_method[128];
1111         char pathname[1024];
1112         int a, b, nBackDots, nEmpty;
1113         int ContentLength = 0;
1114         int BytesRead = 0;
1115         char ContentType[512];
1116         char *content = NULL;
1117         char *content_end = NULL;
1118         struct httprequest *hptr;
1119         char browser_host[256];
1120         char user_agent[256];
1121         int body_start = 0;
1122         int is_static = 0;
1123         int n_static = 0;
1124         int len = 0;
1125         /**
1126          * We stuff these with the values coming from the client cookies,
1127          * so we can use them to reconnect a timed out session if we have to.
1128          */
1129         char c_username[SIZ];
1130         char c_password[SIZ];
1131         char c_roomname[SIZ];
1132         char c_httpauth_string[SIZ];
1133         char c_httpauth_user[SIZ];
1134         char c_httpauth_pass[SIZ];
1135         char cookie[SIZ];
1136
1137         safestrncpy(c_username, "", sizeof c_username);
1138         safestrncpy(c_password, "", sizeof c_password);
1139         safestrncpy(c_roomname, "", sizeof c_roomname);
1140         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
1141         safestrncpy(c_httpauth_user, DEFAULT_HTTPAUTH_USER, sizeof c_httpauth_user);
1142         safestrncpy(c_httpauth_pass, DEFAULT_HTTPAUTH_PASS, sizeof c_httpauth_pass);
1143         strcpy(browser_host, "");
1144
1145         WC->upload_length = 0;
1146         WC->upload = NULL;
1147         WC->vars = NULL;
1148         WC->is_wap = 0;
1149
1150         hptr = req;
1151         if (hptr == NULL) return;
1152
1153         safestrncpy(cmd, hptr->line, sizeof cmd);
1154         hptr = hptr->next;
1155         extract_token(request_method, cmd, 0, ' ', sizeof request_method);
1156         extract_token(pathname, cmd, 1, ' ', sizeof pathname);
1157
1158         /** Figure out the action */
1159         index[0] = action;
1160         sizes[0] = sizeof action;
1161         for (a=1; a<9; a++)
1162         {
1163                 index[a] = arg[a-1];
1164                 sizes[a] = sizeof arg[a-1];
1165         }
1166 ////    index[9] = &foo; todo
1167         nBackDots = 0;
1168         nEmpty = 0;
1169         for ( a = 0; a < 9; ++a)
1170         {
1171                 extract_token(index[a], pathname, a + 1, '/', sizes[a]);
1172                 if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
1173                 if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
1174                 if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
1175                 if ((index[a][0] == '.') && (index[a][1] == '.'))
1176                         nBackDots++;
1177                 if (index[a][0] == '\0')
1178                         nEmpty++;
1179         }
1180
1181         while (hptr != NULL) {
1182                 safestrncpy(buf, hptr->line, sizeof buf);
1183                 /* lprintf(9, "HTTP HEADER: %s\n", buf); */
1184                 hptr = hptr->next;
1185
1186                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
1187                         safestrncpy(cookie, &buf[15], sizeof cookie);
1188                         cookie_to_stuff(cookie, NULL,
1189                                         c_username, sizeof c_username,
1190                                         c_password, sizeof c_password,
1191                                         c_roomname, sizeof c_roomname);
1192                 }
1193                 else if (!strncasecmp(buf, "Authorization: Basic ", 21)) {
1194                         CtdlDecodeBase64(c_httpauth_string, &buf[21], strlen(&buf[21]));
1195                         extract_token(c_httpauth_user, c_httpauth_string, 0, ':', sizeof c_httpauth_user);
1196                         extract_token(c_httpauth_pass, c_httpauth_string, 1, ':', sizeof c_httpauth_pass);
1197                 }
1198                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
1199                         ContentLength = atoi(&buf[16]);
1200                 }
1201                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
1202                         safestrncpy(ContentType, &buf[14], sizeof ContentType);
1203                 }
1204                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
1205                         safestrncpy(user_agent, &buf[12], sizeof user_agent);
1206                 }
1207                 else if (!strncasecmp(buf, "X-Forwarded-Host: ", 18)) {
1208                         if (follow_xff) {
1209                                 safestrncpy(WC->http_host, &buf[18], sizeof WC->http_host);
1210                         }
1211                 }
1212                 else if (!strncasecmp(buf, "Host: ", 6)) {
1213                         if (IsEmptyStr(WC->http_host)) {
1214                                 safestrncpy(WC->http_host, &buf[6], sizeof WC->http_host);
1215                         }
1216                 }
1217                 else if (!strncasecmp(buf, "X-Forwarded-For: ", 17)) {
1218                         safestrncpy(browser_host, &buf[17], sizeof browser_host);
1219                         while (num_tokens(browser_host, ',') > 1) {
1220                                 remove_token(browser_host, 0, ',');
1221                         }
1222                         striplt(browser_host);
1223                 }
1224                 /** Only WAP gateways explicitly name this content-type */
1225                 else if (strstr(buf, "text/vnd.wap.wml")) {
1226                         WC->is_wap = 1;
1227                 }
1228         }
1229
1230         if (ContentLength > 0) {
1231                 content = malloc(ContentLength + SIZ);
1232                 memset(content, 0, ContentLength + SIZ);
1233                 sprintf(content, "Content-type: %s\n"
1234                                 "Content-length: %d\n\n",
1235                                 ContentType, ContentLength);
1236                 body_start = strlen(content);
1237
1238                 /** Read the entire input data at once. */
1239                 client_read(WC->http_sock, &content[BytesRead+body_start], ContentLength);
1240
1241                 if (!strncasecmp(ContentType, "application/x-www-form-urlencoded", 33)) {
1242                         addurls(&content[body_start]);
1243                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
1244                         content_end = content + ContentLength + body_start;
1245                         mime_parser(content, content_end, *upload_handler, NULL, NULL, NULL, 0);
1246                 }
1247         } else {
1248                 content = NULL;
1249         }
1250
1251         /** make a note of where we are in case the user wants to save it */
1252         safestrncpy(WC->this_page, cmd, sizeof(WC->this_page));
1253         remove_token(WC->this_page, 2, ' ');
1254         remove_token(WC->this_page, 0, ' ');
1255
1256         /** If there are variables in the URL, we must grab them now */
1257         len = strlen(cmd);
1258         for (a = 0; a < len; ++a) {
1259                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
1260                         for (b = a; b < len; ++b) {
1261                                 if (isspace(cmd[b])){
1262                                         cmd[b] = 0;
1263                                         len = b - 1;
1264                                 }
1265                         }
1266                         addurls(&cmd[a + 1]);
1267                         cmd[a] = 0;
1268                         len = a - 1;
1269                 }
1270         }
1271
1272         /** If it's a "force 404" situation then display the error and bail. */
1273         if (!strcmp(action, "404")) {
1274                 wprintf("HTTP/1.1 404 Not found\r\n");
1275                 wprintf("Content-Type: text/plain\r\n");
1276                 wprintf("\r\n");
1277                 wprintf("Not found\r\n");
1278                 goto SKIP_ALL_THIS_CRAP;
1279         }
1280
1281         /** Static content can be sent without connecting to Citadel. */
1282         is_static = 0;
1283         for (a=0; a<ndirs; ++a) {
1284                 if (!strcasecmp(action, (char*)static_content_dirs[a])) { /* map web to disk location */
1285                         is_static = 1;
1286                         n_static = a;
1287                 }
1288         }
1289         if (is_static) {
1290                 if (nBackDots < 2)
1291                 {
1292                         snprintf(buf, sizeof buf, "%s/%s/%s/%s/%s/%s/%s/%s",
1293                                  static_dirs[n_static],
1294                                  index[1], index[2], index[3], index[4], index[5], index[6], index[7]);
1295                         for (a=0; a<8; ++a) {
1296                                 if (buf[strlen(buf)-1] == '/') {
1297                                         buf[strlen(buf)-1] = 0;
1298                                 }
1299                         }
1300                         for (a = 0; a < strlen(buf); ++a) {
1301                                 if (isspace(buf[a])) {
1302                                         buf[a] = 0;
1303                                 }
1304                         }
1305                         output_static(buf);
1306                 }
1307                 else
1308                 {
1309                         lprintf(9, "Suspicious request. Ignoring.");
1310                         wprintf("HTTP/1.1 404 Security check failed\r\n");
1311                         wprintf("Content-Type: text/plain\r\n");
1312                         wprintf("\r\n");
1313                         wprintf("You have sent a malformed or invalid request.\r\n");
1314                 }
1315                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
1316         }
1317
1318         /* If the client sent a nonce that is incorrect, kill the request. */
1319         if (strlen(bstr("nonce")) > 0) {
1320                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
1321                         bstr("nonce"), WC->nonce);
1322                 if (atoi(bstr("nonce")) != WC->nonce) {
1323                         lprintf(9, "Ignoring request with mismatched nonce.\n");
1324                         wprintf("HTTP/1.1 404 Security check failed\r\n");
1325                         wprintf("Content-Type: text/plain\r\n");
1326                         wprintf("\r\n");
1327                         wprintf("Security check failed.\r\n");
1328                         goto SKIP_ALL_THIS_CRAP;
1329                 }
1330         }
1331
1332         /**
1333          * If we're not connected to a Citadel server, try to hook up the
1334          * connection now.
1335          */
1336         if (!WC->connected) {
1337                 if (!strcasecmp(ctdlhost, "uds")) {
1338                         /* unix domain socket */
1339                         sprintf(buf, "%s/citadel.socket", ctdlport);
1340                         WC->serv_sock = uds_connectsock(buf);
1341                 }
1342                 else {
1343                         /* tcp socket */
1344                         WC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
1345                 }
1346
1347                 if (WC->serv_sock < 0) {
1348                         do_logout();
1349                         goto SKIP_ALL_THIS_CRAP;
1350                 }
1351                 else {
1352                         WC->connected = 1;
1353                         serv_getln(buf, sizeof buf);    /** get the server welcome message */
1354
1355                         /**
1356                          * From what host is our user connecting?  Go with
1357                          * the host at the other end of the HTTP socket,
1358                          * unless we are following X-Forwarded-For: headers
1359                          * and such a header has already turned up something.
1360                          */
1361                         if ( (!follow_xff) || (strlen(browser_host) == 0) ) {
1362                                 locate_host(browser_host, WC->http_sock);
1363                         }
1364
1365                         get_serv_info(browser_host, user_agent);
1366                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
1367                                 wprintf(_("You are connected to a Citadel "
1368                                         "server running Citadel %d.%02d. \n"
1369                                         "In order to run this version of WebCit "
1370                                         "you must also have Citadel %d.%02d or"
1371                                         " newer.\n\n\n"),
1372                                                 serv_info.serv_rev_level / 100,
1373                                                 serv_info.serv_rev_level % 100,
1374                                                 MINIMUM_CIT_VERSION / 100,
1375                                                 MINIMUM_CIT_VERSION % 100
1376                                         );
1377                                 end_webcit_session();
1378                                 goto SKIP_ALL_THIS_CRAP;
1379                         }
1380                 }
1381         }
1382
1383         /**
1384          * Functions which can be performed without logging in
1385          */
1386         if (!strcasecmp(action, "listsub")) {
1387                 do_listsub();
1388                 goto SKIP_ALL_THIS_CRAP;
1389         }
1390 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1391         if (!strcasecmp(action, "freebusy")) {
1392                 do_freebusy(cmd);
1393                 goto SKIP_ALL_THIS_CRAP;
1394         }
1395 #endif
1396
1397         /**
1398          * If we're not logged in, but we have HTTP Authentication data,
1399          * try logging in to Citadel using that.
1400          */
1401         if ((!WC->logged_in)
1402            && (strlen(c_httpauth_user) > 0)
1403            && (strlen(c_httpauth_pass) > 0)) {
1404                 serv_printf("USER %s", c_httpauth_user);
1405                 serv_getln(buf, sizeof buf);
1406                 if (buf[0] == '3') {
1407                         serv_printf("PASS %s", c_httpauth_pass);
1408                         serv_getln(buf, sizeof buf);
1409                         if (buf[0] == '2') {
1410                                 become_logged_in(c_httpauth_user,
1411                                                 c_httpauth_pass, buf);
1412                                 safestrncpy(WC->httpauth_user, c_httpauth_user, sizeof WC->httpauth_user);
1413                                 safestrncpy(WC->httpauth_pass, c_httpauth_pass, sizeof WC->httpauth_pass);
1414                         } else {
1415                                 /** Should only display when password is wrong */
1416                                 authorization_required(&buf[4]);
1417                                 goto SKIP_ALL_THIS_CRAP;
1418                         }
1419                 }
1420         }
1421
1422         /** This needs to run early */
1423         if (!strcasecmp(action, "rss")) {
1424                 display_rss(bstr("room"), request_method);
1425                 goto SKIP_ALL_THIS_CRAP;
1426         }
1427
1428         /**
1429          * The GroupDAV stuff relies on HTTP authentication instead of
1430          * our session's authentication.
1431          */
1432         if (!strncasecmp(action, "groupdav", 8)) {
1433                 groupdav_main(req, ContentType, /* do GroupDAV methods */
1434                         ContentLength, content+body_start);
1435                 if (!WC->logged_in) {
1436                         WC->killthis = 1;       /* If not logged in, don't */
1437                 }                               /* keep the session active */
1438                 goto SKIP_ALL_THIS_CRAP;
1439         }
1440
1441
1442         /**
1443          * Automatically send requests with any method other than GET or
1444          * POST to the GroupDAV code as well.
1445          */
1446         if ((strcasecmp(request_method, "GET")) && (strcasecmp(request_method, "POST"))) {
1447                 groupdav_main(req, ContentType, /** do GroupDAV methods */
1448                         ContentLength, content+body_start);
1449                 if (!WC->logged_in) {
1450                         WC->killthis = 1;       /** If not logged in, don't */
1451                 }                               /** keep the session active */
1452                 goto SKIP_ALL_THIS_CRAP;
1453         }
1454
1455         /**
1456          * If we're not logged in, but we have username and password cookies
1457          * supplied by the browser, try using them to log in.
1458          */
1459         if ((!WC->logged_in)
1460            && (!IsEmptyStr(c_username))
1461            && (!IsEmptyStr(c_password))) {
1462                 serv_printf("USER %s", c_username);
1463                 serv_getln(buf, sizeof buf);
1464                 if (buf[0] == '3') {
1465                         serv_printf("PASS %s", c_password);
1466                         serv_getln(buf, sizeof buf);
1467                         if (buf[0] == '2') {
1468                                 become_logged_in(c_username, c_password, buf);
1469                         }
1470                 }
1471         }
1472         /**
1473          * If we don't have a current room, but a cookie specifying the
1474          * current room is supplied, make an effort to go there.
1475          */
1476         if ((IsEmptyStr(WC->wc_roomname)) && (!IsEmptyStr(c_roomname))) {
1477                 serv_printf("GOTO %s", c_roomname);
1478                 serv_getln(buf, sizeof buf);
1479                 if (buf[0] == '2') {
1480                         safestrncpy(WC->wc_roomname, c_roomname, sizeof WC->wc_roomname);
1481                 }
1482         }
1483
1484         if (!strcasecmp(action, "image")) {
1485                 output_image();
1486
1487                 /**
1488                  * All functions handled below this point ... make sure we log in
1489                  * before doing anything else!
1490                  */
1491         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
1492                 do_login();
1493         } else if (!WC->logged_in) {
1494                 display_login(NULL);
1495         }
1496
1497         /**
1498          * Various commands...
1499          */
1500
1501         else if (!strcasecmp(action, "do_welcome")) {
1502                 do_welcome();
1503         } else if (!strcasecmp(action, "blank")) {
1504                 blank_page();
1505         } else if (!strcasecmp(action, "do_template")) {
1506                 url_do_template();
1507         } else if (!strcasecmp(action, "display_aide_menu")) {
1508                 display_aide_menu();
1509         } else if (!strcasecmp(action, "server_shutdown")) {
1510                 display_shutdown();
1511         } else if (!strcasecmp(action, "display_main_menu")) {
1512                 display_main_menu();
1513         } else if (!strcasecmp(action, "who")) {
1514                 who();
1515         } else if (!strcasecmp(action, "sslg")) {
1516                 seconds_since_last_gexp();
1517         } else if (!strcasecmp(action, "who_inner_html")) {
1518                 begin_ajax_response();
1519                 who_inner_div();
1520                 end_ajax_response();
1521         } else if (!strcasecmp(action, "wholist_section")) {
1522                 begin_ajax_response();
1523                 wholist_section();
1524                 end_ajax_response();
1525         } else if (!strcasecmp(action, "new_messages_html")) {
1526                 begin_ajax_response();
1527                 new_messages_section();
1528                 end_ajax_response();
1529         } else if (!strcasecmp(action, "tasks_inner_html")) {
1530                 begin_ajax_response();
1531                 tasks_section();
1532                 end_ajax_response();
1533         } else if (!strcasecmp(action, "calendar_inner_html")) {
1534                 begin_ajax_response();
1535                 calendar_section();
1536                 end_ajax_response();
1537         } else if (!strcasecmp(action, "mini_calendar")) {
1538                 begin_ajax_response();
1539                 ajax_mini_calendar();
1540                 end_ajax_response();
1541         } else if (!strcasecmp(action, "iconbar_ajax_menu")) {
1542                 begin_ajax_response();
1543                 do_iconbar();
1544                 end_ajax_response();
1545         } else if (!strcasecmp(action, "iconbar_ajax_rooms")) {
1546                 begin_ajax_response();
1547                 do_iconbar_roomlist();
1548                 end_ajax_response();
1549         } else if (!strcasecmp(action, "knrooms")) {
1550                 knrooms();
1551         } else if (!strcasecmp(action, "gotonext")) {
1552                 slrp_highest();
1553                 gotonext();
1554         } else if (!strcasecmp(action, "skip")) {
1555                 gotonext();
1556         } else if (!strcasecmp(action, "ungoto")) {
1557                 ungoto();
1558         } else if (!strcasecmp(action, "dotgoto")) {
1559                 if (WC->wc_view != VIEW_MAILBOX) {      /* dotgoto acts like dotskip when we're in a mailbox view */
1560                         slrp_highest();
1561                 }
1562                 smart_goto(bstr("room"));
1563         } else if (!strcasecmp(action, "dotskip")) {
1564                 smart_goto(bstr("room"));
1565         } else if (!strcasecmp(action, "termquit")) {
1566                 do_logout();
1567         } else if (!strcasecmp(action, "readnew")) {
1568                 readloop("readnew");
1569         } else if (!strcasecmp(action, "readold")) {
1570                 readloop("readold");
1571         } else if (!strcasecmp(action, "readfwd")) {
1572                 readloop("readfwd");
1573         } else if (!strcasecmp(action, "headers")) {
1574                 readloop("headers");
1575         } else if (!strcasecmp(action, "do_search")) {
1576                 readloop("do_search");
1577         } else if (!strcasecmp(action, "msg")) {
1578                 embed_message(index[1]);
1579         } else if (!strcasecmp(action, "printmsg")) {
1580                 print_message(index[1]);
1581         } else if (!strcasecmp(action, "msgheaders")) {
1582                 display_headers(index[1]);
1583         } else if (!strcasecmp(action, "wiki")) {
1584                 display_wiki_page();
1585         } else if (!strcasecmp(action, "display_enter")) {
1586                 display_enter();
1587         } else if (!strcasecmp(action, "post")) {
1588                 post_message();
1589         } else if (!strcasecmp(action, "move_msg")) {
1590                 move_msg();
1591         } else if (!strcasecmp(action, "delete_msg")) {
1592                 delete_msg();
1593         } else if (!strcasecmp(action, "userlist")) {
1594                 userlist();
1595         } else if (!strcasecmp(action, "showuser")) {
1596                 showuser();
1597         } else if (!strcasecmp(action, "display_page")) {
1598                 display_page();
1599         } else if (!strcasecmp(action, "page_user")) {
1600                 page_user();
1601         } else if (!strcasecmp(action, "chat")) {
1602                 do_chat();
1603         } else if (!strcasecmp(action, "display_private")) {
1604                 display_private("", 0);
1605         } else if (!strcasecmp(action, "goto_private")) {
1606                 goto_private();
1607         } else if (!strcasecmp(action, "zapped_list")) {
1608                 zapped_list();
1609         } else if (!strcasecmp(action, "display_zap")) {
1610                 display_zap();
1611         } else if (!strcasecmp(action, "zap")) {
1612                 zap();
1613         } else if (!strcasecmp(action, "display_entroom")) {
1614                 display_entroom();
1615         } else if (!strcasecmp(action, "entroom")) {
1616                 entroom();
1617         } else if (!strcasecmp(action, "display_whok")) {
1618                 display_whok();
1619         } else if (!strcasecmp(action, "do_invt_kick")) {
1620                 do_invt_kick();
1621         } else if (!strcasecmp(action, "display_editroom")) {
1622                 display_editroom();
1623         } else if (!strcasecmp(action, "netedit")) {
1624                 netedit();
1625         } else if (!strcasecmp(action, "editroom")) {
1626                 editroom();
1627         } else if (!strcasecmp(action, "display_editinfo")) {
1628                 display_edit(_("Room info"), "EINF 0", "RINF", "editinfo", 1);
1629         } else if (!strcasecmp(action, "editinfo")) {
1630                 save_edit(_("Room info"), "EINF 1", 1);
1631         } else if (!strcasecmp(action, "display_editbio")) {
1632                 sprintf(buf, "RBIO %s", WC->wc_fullname);
1633                 display_edit(_("Your bio"), "NOOP", buf, "editbio", 3);
1634         } else if (!strcasecmp(action, "editbio")) {
1635                 save_edit(_("Your bio"), "EBIO", 0);
1636         } else if (!strcasecmp(action, "confirm_move_msg")) {
1637                 confirm_move_msg();
1638         } else if (!strcasecmp(action, "delete_room")) {
1639                 delete_room();
1640         } else if (!strcasecmp(action, "validate")) {
1641                 validate();
1642         } else if (!strcasecmp(action, "display_editpic")) {
1643                 display_graphics_upload(_("your photo"),
1644                                         "UIMG 0|_userpic_",
1645                                         "editpic");
1646         } else if (!strcasecmp(action, "editpic")) {
1647                 do_graphics_upload("UIMG 1|_userpic_");
1648         } else if (!strcasecmp(action, "display_editroompic")) {
1649                 display_graphics_upload(_("the icon for this room"),
1650                                         "UIMG 0|_roompic_",
1651                                         "editroompic");
1652         } else if (!strcasecmp(action, "editroompic")) {
1653                 do_graphics_upload("UIMG 1|_roompic_");
1654         } else if (!strcasecmp(action, "delete_floor")) {
1655                 delete_floor();
1656         } else if (!strcasecmp(action, "rename_floor")) {
1657                 rename_floor();
1658         } else if (!strcasecmp(action, "create_floor")) {
1659                 create_floor();
1660         } else if (!strcasecmp(action, "display_editfloorpic")) {
1661                 sprintf(buf, "UIMG 0|_floorpic_|%s",
1662                         bstr("which_floor"));
1663                 display_graphics_upload(_("the icon for this floor"),
1664                                         buf,
1665                                         "editfloorpic");
1666         } else if (!strcasecmp(action, "editfloorpic")) {
1667                 sprintf(buf, "UIMG 1|_floorpic_|%s",
1668                         bstr("which_floor"));
1669                 do_graphics_upload(buf);
1670         } else if (!strcasecmp(action, "display_reg")) {
1671                 display_reg(0);
1672         } else if (!strcasecmp(action, "display_changepw")) {
1673                 display_changepw();
1674         } else if (!strcasecmp(action, "changepw")) {
1675                 changepw();
1676         } else if (!strcasecmp(action, "display_edit_node")) {
1677                 display_edit_node();
1678         } else if (!strcasecmp(action, "edit_node")) {
1679                 edit_node();
1680         } else if (!strcasecmp(action, "display_netconf")) {
1681                 display_netconf();
1682         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
1683                 display_confirm_delete_node();
1684         } else if (!strcasecmp(action, "delete_node")) {
1685                 delete_node();
1686         } else if (!strcasecmp(action, "display_add_node")) {
1687                 display_add_node();
1688         } else if (!strcasecmp(action, "terminate_session")) {
1689                 slrp_highest();
1690                 terminate_session();
1691         } else if (!strcasecmp(action, "edit_me")) {
1692                 edit_me();
1693         } else if (!strcasecmp(action, "display_siteconfig")) {
1694                 display_siteconfig();
1695         } else if (!strcasecmp(action, "chat_recv")) {
1696                 chat_recv();
1697         } else if (!strcasecmp(action, "chat_send")) {
1698                 chat_send();
1699         } else if (!strcasecmp(action, "siteconfig")) {
1700                 siteconfig();
1701         } else if (!strcasecmp(action, "display_generic")) {
1702                 display_generic();
1703         } else if (!strcasecmp(action, "do_generic")) {
1704                 do_generic();
1705         } else if (!strcasecmp(action, "ajax_servcmd")) {
1706                 ajax_servcmd();
1707         } else if (!strcasecmp(action, "display_menubar")) {
1708                 display_menubar(1);
1709         } else if (!strcasecmp(action, "mimepart")) {
1710                 mimepart(index[1], index[2], 0);
1711         } else if (!strcasecmp(action, "mimepart_download")) {
1712                 mimepart(index[1], index[2], 1);
1713         } else if (!strcasecmp(action, "edit_vcard")) {
1714                 edit_vcard();
1715         } else if (!strcasecmp(action, "submit_vcard")) {
1716                 submit_vcard();
1717         } else if (!strcasecmp(action, "select_user_to_edit")) {
1718                 select_user_to_edit(NULL, NULL);
1719         } else if (!strcasecmp(action, "display_edituser")) {
1720                 display_edituser(NULL, 0);
1721         } else if (!strcasecmp(action, "edituser")) {
1722                 edituser();
1723         } else if (!strcasecmp(action, "create_user")) {
1724                 create_user();
1725         } else if (!strcasecmp(action, "changeview")) {
1726                 change_view();
1727         } else if (!strcasecmp(action, "change_start_page")) {
1728                 change_start_page();
1729         } else if (!strcasecmp(action, "display_floorconfig")) {
1730                 display_floorconfig(NULL);
1731         } else if (!strcasecmp(action, "toggle_self_service")) {
1732                 toggle_self_service();
1733 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1734         } else if (!strcasecmp(action, "display_edit_task")) {
1735                 display_edit_task();
1736         } else if (!strcasecmp(action, "save_task")) {
1737                 save_task();
1738         } else if (!strcasecmp(action, "display_edit_event")) {
1739                 display_edit_event();
1740         } else if (!strcasecmp(action, "save_event")) {
1741                 save_event();
1742         } else if (!strcasecmp(action, "respond_to_request")) {
1743                 respond_to_request();
1744         } else if (!strcasecmp(action, "handle_rsvp")) {
1745                 handle_rsvp();
1746 #endif
1747         } else if (!strcasecmp(action, "summary")) {
1748                 summary();
1749         } else if (!strcasecmp(action, "summary_inner_div")) {
1750                 begin_ajax_response();
1751                 summary_inner_div();
1752                 end_ajax_response();
1753         } else if (!strcasecmp(action, "display_customize_iconbar")) {
1754                 display_customize_iconbar();
1755         } else if (!strcasecmp(action, "commit_iconbar")) {
1756                 commit_iconbar();
1757         } else if (!strcasecmp(action, "set_room_policy")) {
1758                 set_room_policy();
1759         } else if (!strcasecmp(action, "display_inetconf")) {
1760                 display_inetconf();
1761         } else if (!strcasecmp(action, "save_inetconf")) {
1762                 save_inetconf();
1763         } else if (!strcasecmp(action, "display_smtpqueue")) {
1764                 display_smtpqueue();
1765         } else if (!strcasecmp(action, "display_smtpqueue_inner_div")) {
1766                 display_smtpqueue_inner_div();
1767         } else if (!strcasecmp(action, "display_sieve")) {
1768                 display_sieve();
1769         } else if (!strcasecmp(action, "save_sieve")) {
1770                 save_sieve();
1771         } else if (!strcasecmp(action, "display_pushemail")) {
1772                 display_pushemail();
1773         } else if (!strcasecmp(action, "save_pushemail")) {
1774                 save_pushemail();
1775         } else if (!strcasecmp(action, "display_add_remove_scripts")) {
1776                 display_add_remove_scripts(NULL);
1777         } else if (!strcasecmp(action, "create_script")) {
1778                 create_script();
1779         } else if (!strcasecmp(action, "delete_script")) {
1780                 delete_script();
1781         } else if (!strcasecmp(action, "setup_wizard")) {
1782                 do_setup_wizard();
1783         } else if (!strcasecmp(action, "display_preferences")) {
1784                 display_preferences();
1785         } else if (!strcasecmp(action, "set_preferences")) {
1786                 set_preferences();
1787         } else if (!strcasecmp(action, "recp_autocomplete")) {
1788                 recp_autocomplete(bstr("recp"));
1789         } else if (!strcasecmp(action, "cc_autocomplete")) {
1790                 recp_autocomplete(bstr("cc"));
1791         } else if (!strcasecmp(action, "bcc_autocomplete")) {
1792                 recp_autocomplete(bstr("bcc"));
1793         } else if (!strcasecmp(action, "display_address_book_middle_div")) {
1794                 display_address_book_middle_div();
1795         } else if (!strcasecmp(action, "display_address_book_inner_div")) {
1796                 display_address_book_inner_div();
1797         } else if (!strcasecmp(action, "set_floordiv_expanded")) {
1798                 set_floordiv_expanded(index[1]);
1799         } else if (!strcasecmp(action, "diagnostics")) {
1800                 output_headers(1, 1, 1, 0, 0, 0);
1801                 wprintf("Session: %d<hr />\n", WC->wc_session);
1802                 wprintf("Command: <br /><PRE>\n");
1803                 escputs(cmd);
1804                 wprintf("</PRE><hr />\n");
1805                 wprintf("Variables: <br /><PRE>\n");
1806                 dump_vars();
1807                 wprintf("</PRE><hr />\n");
1808                 wDumpContent(1);
1809         } else if (!strcasecmp(action, "updatenote")) {
1810                 updatenote();
1811         } else if (!strcasecmp(action, "display_room_directory")) {
1812                 display_room_directory();
1813         } else if (!strcasecmp(action, "download_file")) {
1814                 download_file(index[1]);
1815         } else if (!strcasecmp(action, "upload_file")) {
1816                 upload_file();
1817         }
1818
1819         /** When all else fais, display the main menu. */
1820         else {
1821                 display_main_menu();
1822         }
1823
1824 SKIP_ALL_THIS_CRAP:
1825         fflush(stdout);
1826         if (content != NULL) {
1827                 free(content);
1828                 content = NULL;
1829         }
1830         free_urls();
1831         if (WC->upload_length > 0) {
1832                 free(WC->upload);
1833                 WC->upload_length = 0;
1834         }
1835 }
1836
1837 /**
1838  * \brief Replacement for sleep() that uses select() in order to avoid SIGALRM
1839  * \param seconds how many seconds should we sleep?
1840  */
1841 void sleeeeeeeeeep(int seconds)
1842 {
1843         struct timeval tv;
1844
1845         tv.tv_sec = seconds;
1846         tv.tv_usec = 0;
1847         select(0, NULL, NULL, NULL, &tv);
1848 }
1849
1850
1851 /*@}*/