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                         wprintf("<span class=\"imsg\">"
 543                                 "%s</span><br />\n", WC->ImportantMessage);
 544                         wprintf("</div>\n");
 545                         wprintf("<script type=\"text/javascript\">\n"
 546                                 "        setTimeout('hide_imsg_popup()', 3000); \n"
 547                                 "</script>\n");
 548                         safestrncpy(WC->ImportantMessage, "", sizeof WC->ImportantMessage);
 549                 }
 550
 551                 if ( (WC->logged_in) && (!unset_cookies) ) {
 552                         wprintf("<div id=\"iconbar\">");
 553                         do_selected_iconbar();
 554                         /** check for instant messages (these display in a new window) */
 555                         page_popup();
 556                         wprintf("</div>");
 557                 }
 558
 559                 if (do_room_banner == 1) {
 560                         wprintf("<div id=\"banner\">\n");
 561                         embed_room_banner(NULL, navbar_default);
 562                         wprintf("</div>\n");
 563                 }
 564         }
 565
 566         if (do_room_banner == 1) {
 567                 wprintf("<div id=\"content\">\n");
 568         }
 569 }
 570
 571
 572 /**
 573  * \brief Generic function to do an HTTP redirect.  Easy and fun.
 574  * \param whichpage target url to 302 to
 575  */
 576 void http_redirect(char *whichpage) {
 577         wprintf("HTTP/1.1 302 Moved Temporarily\n");
 578         wprintf("Location: %s\r\n", whichpage);
 579         wprintf("URI: %s\r\n", whichpage);
 580         wprintf("Content-type: text/html; charset=utf-8\r\n\r\n");
 581         wprintf("<html><body>");
 582         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 583         wprintf("</body></html>\n");
 584 }
 585
 586
 587
 588 /**
 589  * \brief Output a piece of content to the web browser
 590  */
 591 void http_transmit_thing(char *thing, size_t length, char *content_type,
 592                          int is_static) {
 593
 594         output_headers(0, 0, 0, 0, 0, is_static);
 595
 596         wprintf("Content-type: %s\r\n"
 597                 "Server: %s\r\n"
 598                 "Connection: close\r\n",
 599                 content_type,
 600                 PACKAGE_STRING);
 601
 602 #ifdef HAVE_ZLIB
 603         /** If we can send the data out compressed, please do so. */
 604         if (WC->gzip_ok) {
 605                 char *compressed_data = NULL;
 606                 size_t compressed_len;
 607
 608                 compressed_len =  ((length * 101) / 100) + 100;
 609                 compressed_data = malloc(compressed_len);
 610
 611                 if (compress_gzip((Bytef *) compressed_data,
 612                                   &compressed_len,
 613                                   (Bytef *) thing,
 614                                   (uLongf) length, Z_BEST_SPEED) == Z_OK) {
 615                         wprintf("Content-encoding: gzip\r\n"
 616                                 "Content-length: %ld\r\n"
 617                                 "\r\n",
 618                                 (long) compressed_len
 619                         );
 620                         client_write(compressed_data, (size_t)compressed_len);
 621                         free(compressed_data);
 622                         return;
 623                 }
 624         }
 625 #endif
 626
 627         /** No compression ... just send it out as-is */
 628         wprintf("Content-length: %ld\r\n"
 629                 "\r\n",
 630                 (long) length
 631         );
 632         client_write(thing, (size_t)length);
 633 }
 634
 635 /**
 636  * \brief print menu box like used in the floor view or admin interface.
 637  * This function takes pair of strings as va_args,
 638  * \param Title Title string of the box
 639  * \param Class CSS Class for the box
 640  * \param nLines How many string pairs should we print? (URL, UrlText)
 641  * \param ... Pairs of URL Strings and their Names
 642  */
 643 void print_menu_box(char* Title, char *Class, int nLines, ...)
 644 {
 645         va_list arg_list;
 646         long i;
 647
 648         svprintf("BOXTITLE", WCS_STRING, Title);
 649         do_template("beginbox");
 650
 651         wprintf("<ul class=\"%s\">", Class);
 652
 653         va_start(arg_list, nLines);
 654         for (i = 0; i < nLines; ++i)
 655         {
 656                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 657                 wprintf((char *) va_arg(arg_list, char *));
 658                 wprintf("</a></li>\n");
 659         }
 660         va_end (arg_list);
 661
 662         wprintf("</a></li>\n");
 663
 664         wprintf("</ul>");
 665
 666         do_template("endbox");
 667 }
 668
 669
 670 /**
 671  * \brief dump out static pages from disk
 672  * \param what the file urs to print
 673  */
 674 void output_static(char *what)
 675 {
 676         FILE *fp;
 677         struct stat statbuf;
 678         off_t bytes;
 679         off_t count = 0;
 680         size_t res;
 681         char *bigbuffer;
 682         char content_type[128];
 683         int len;
 684
 685         fp = fopen(what, "rb");
 686         if (fp == NULL) {
 687                 lprintf(9, "output_static('%s')  -- NOT FOUND --\n", what);
 688                 wprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 689                 wprintf("Content-Type: text/plain\r\n");
 690                 wprintf("\r\n");
 691                 wprintf("Cannot open %s: %s\r\n", what, strerror(errno));
 692         } else {
 693                 len = strlen (what);
 694                 if (!strncasecmp(&what[len - 4], ".gif", 4))
 695                         safestrncpy(content_type, "image/gif", sizeof content_type);
 696                 else if (!strncasecmp(&what[len - 4], ".txt", 4))
 697                         safestrncpy(content_type, "text/plain", sizeof content_type);
 698                 else if (!strncasecmp(&what[len - 4], ".css", 4))
 699                         safestrncpy(content_type, "text/css", sizeof content_type);
 700                 else if (!strncasecmp(&what[len - 4], ".jpg", 4))
 701                         safestrncpy(content_type, "image/jpeg", sizeof content_type);
 702                 else if (!strncasecmp(&what[len - 4], ".png", 4))
 703                         safestrncpy(content_type, "image/png", sizeof content_type);
 704                 else if (!strncasecmp(&what[len - 4], ".ico", 4))
 705                         safestrncpy(content_type, "image/x-icon", sizeof content_type);
 706                 else if (!strncasecmp(&what[len - 5], ".html", 5))
 707                         safestrncpy(content_type, "text/html", sizeof content_type);
 708                 else if (!strncasecmp(&what[len - 4], ".htm", 4))
 709                         safestrncpy(content_type, "text/html", sizeof content_type);
 710                 else if (!strncasecmp(&what[len - 4], ".wml", 4))
 711                         safestrncpy(content_type, "text/vnd.wap.wml", sizeof content_type);
 712                 else if (!strncasecmp(&what[len - 5], ".wmls", 5))
 713                         safestrncpy(content_type, "text/vnd.wap.wmlscript", sizeof content_type);
 714                 else if (!strncasecmp(&what[len - 5], ".wmlc", 5))
 715                         safestrncpy(content_type, "application/vnd.wap.wmlc", sizeof content_type);
 716                 else if (!strncasecmp(&what[len - 6], ".wmlsc", 6))
 717                         safestrncpy(content_type, "application/vnd.wap.wmlscriptc", sizeof content_type);
 718                 else if (!strncasecmp(&what[len - 5], ".wbmp", 5))
 719                         safestrncpy(content_type, "image/vnd.wap.wbmp", sizeof content_type);
 720                 else if (!strncasecmp(&what[len - 3], ".js", 3))
 721                         safestrncpy(content_type, "text/javascript", sizeof content_type);
 722                 else
 723                         safestrncpy(content_type, "application/octet-stream", sizeof content_type);
 724
 725                 if (fstat(fileno(fp), &statbuf) == -1) {
 726                         lprintf(9, "output_static('%s')  -- FSTAT FAILED --\n", what);
 727                         wprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 728                         wprintf("Content-Type: text/plain\r\n");
 729                         wprintf("\r\n");
 730                         wprintf("Cannot fstat %s: %s\n", what, strerror(errno));
 731                         return;
 732                 }
 733
 734                 count = 0;
 735                 bytes = statbuf.st_size;
 736                 if ((bigbuffer = malloc(bytes + 2)) == NULL) {
 737                         lprintf(9, "output_static('%s')  -- MALLOC FAILED (%s) --\n", what, strerror(errno));
 738                         wprintf("HTTP/1.1 500 internal server error\r\n");
 739                         wprintf("Content-Type: text/plain\r\n");
 740                         wprintf("\r\n");
 741                         return;
 742                 }
 743                 while (count < bytes) {
 744                         if ((res = fread(bigbuffer + count, 1, bytes - count, fp)) == 0) {
 745                                 lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) %zu bytes of %zu --\n", what, strerror(errno), bytes - count, bytes);
 746                                 wprintf("HTTP/1.1 500 internal server error \r\n");
 747                                 wprintf("Content-Type: text/plain\r\n");
 748                                 wprintf("\r\n");
 749                                 return;
 750                         }
 751                         count += res;
 752                 }
 753
 754                 fclose(fp);
 755
 756                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
 757                 http_transmit_thing(bigbuffer, (size_t)bytes, content_type, 1);
 758                 free(bigbuffer);
 759         }
 760         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 761                 end_webcit_session();
 762         }
 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
 776         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 777         serv_getln(buf, sizeof buf);
 778         if (buf[0] == '2') {
 779                 bytes = extract_long(&buf[4], 0);
 780                 xferbuf = malloc(bytes + 2);
 781
 782                 /** Read it from the server */
 783                 read_server_binary(xferbuf, bytes);
 784                 serv_puts("CLOS");
 785                 serv_getln(buf, sizeof buf);
 786
 787                 /** Write it to the browser */
 788                 http_transmit_thing(xferbuf, (size_t)bytes, "image/gif", 0);
 789                 free(xferbuf);
 790
 791         } else {
 792                 /**
 793                  * Instead of an ugly 404, send a 1x1 transparent GIF
 794                  * when there's no such image on the server.
 795                  */
 796                 char blank_gif[SIZ];
 797                 snprintf (blank_gif, SIZ, "%s%s", static_dirs[0], "/blank.gif");
 798                 output_static(blank_gif);
 799         }
 800
 801
 802
 803 }
 804
 805 /**
 806  * \brief Generic function to output an arbitrary MIME part from an arbitrary
 807  *        message number on the server.
 808  *
 809  * \param msgnum                Number of the item on the citadel server
 810  * \param partnum               The MIME part to be output
 811  * \param force_download        Nonzero to force set the Content-Type: header
 812  *                              to "application/octet-stream"
 813  */
 814 void mimepart(char *msgnum, char *partnum, int force_download)
 815 {
 816         char buf[256];
 817         off_t bytes;
 818         char content_type[256];
 819         char *content = NULL;
 820
 821         serv_printf("OPNA %s|%s", msgnum, partnum);
 822         serv_getln(buf, sizeof buf);
 823         if (buf[0] == '2') {
 824                 bytes = extract_long(&buf[4], 0);
 825                 content = malloc(bytes + 2);
 826                 if (force_download) {
 827                         strcpy(content_type, "application/octet-stream");
 828                 }
 829                 else {
 830                         extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
 831                 }
 832                 output_headers(0, 0, 0, 0, 0, 0);
 833                 read_server_binary(content, bytes);
 834                 serv_puts("CLOS");
 835                 serv_getln(buf, sizeof buf);
 836                 http_transmit_thing(content, bytes, content_type, 0);
 837                 free(content);
 838         } else {
 839                 wprintf("HTTP/1.1 404 %s\n", &buf[4]);
 840                 output_headers(0, 0, 0, 0, 0, 0);
 841                 wprintf("Content-Type: text/plain\r\n");
 842                 wprintf("\r\n");
 843                 wprintf(_("An error occurred while retrieving this part: %s\n"), &buf[4]);
 844         }
 845
 846 }
 847
 848
 849 /**
 850  * \brief Read any MIME part of a message, from the server, into memory.
 851  * \param msgnum number of the message on the citadel server
 852  * \param partnum the MIME part to be loaded
 853  */
 854 char *load_mimepart(long msgnum, char *partnum)
 855 {
 856         char buf[SIZ];
 857         off_t bytes;
 858         char content_type[SIZ];
 859         char *content;
 860
 861         serv_printf("DLAT %ld|%s", msgnum, partnum);
 862         serv_getln(buf, sizeof buf);
 863         if (buf[0] == '6') {
 864                 bytes = extract_long(&buf[4], 0);
 865                 extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
 866
 867                 content = malloc(bytes + 2);
 868                 serv_read(content, bytes);
 869
 870                 content[bytes] = 0;     /* null terminate for good measure */
 871                 return(content);
 872         }
 873         else {
 874                 return(NULL);
 875         }
 876
 877 }
 878
 879
 880 /**
 881  * \brief Convenience functions to display a page containing only a string
 882  * \param titlebarcolor color of the titlebar of the frame
 883  * \param titlebarmsg text to display in the title bar
 884  * \param messagetext body of the box
 885  */
 886 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 887 {
 888         wprintf("HTTP/1.1 200 OK\n");
 889         output_headers(1, 1, 2, 0, 0, 0);
 890         wprintf("<div id=\"banner\">\n");
 891         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 892         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 893         wprintf("</td></tr></table>\n");
 894         wprintf("</div>\n<div id=\"content\">\n");
 895         escputs(messagetext);
 896
 897         wprintf("<hr />\n");
 898         wDumpContent(1);
 899 }
 900
 901
 902 /**
 903  * \brief Display a blank page.
 904  */
 905 void blank_page(void) {
 906         output_headers(1, 1, 0, 0, 0, 0);
 907         wDumpContent(2);
 908 }
 909
 910
 911 /**
 912  * \brief A template has been requested
 913  */
 914 void url_do_template(void) {
 915         do_template(bstr("template"));
 916 }
 917
 918
 919
 920 /**
 921  * \brief Offer to make any page the user's "start page."
 922  */
 923 void offer_start_page(void) {
 924         wprintf("<a href=\"change_start_page?startpage=");
 925         urlescputs(WC->this_page);
 926         wprintf("\">");
 927         wprintf(_("Make this my start page"));
 928         wprintf("</a>");
 929 #ifdef TECH_PREVIEW
 930         wprintf("<br/><a href=\"rss?room=");
 931         urlescputs(WC->wc_roomname);
 932         wprintf("\" title=\"RSS 2.0 feed for ");
 933         escputs(WC->wc_roomname);
 934         wprintf("\"><img alt=\"RSS\" border=\"0\" src=\"static/xml_button.gif\"/></a>\n");
 935 #endif
 936 }
 937
 938
 939 /**
 940  * \brief Change the user's start page
 941  */
 942 void change_start_page(void) {
 943
 944         if (bstr("startpage") == NULL) {
 945                 safestrncpy(WC->ImportantMessage,
 946                         _("You no longer have a start page selected."),
 947                         sizeof WC->ImportantMessage);
 948                 display_main_menu();
 949                 return;
 950         }
 951
 952         set_preference("startpage", bstr("startpage"), 1);
 953
 954         output_headers(1, 1, 0, 0, 0, 0);
 955         do_template("newstartpage");
 956         wDumpContent(1);
 957 }
 958
 959
 960
 961 /**
 962  * \brief convenience function to indicate success
 963  * \param successmessage the mesage itself
 964  */
 965 void display_success(char *successmessage)
 966 {
 967         convenience_page("007700", "OK", successmessage);
 968 }
 969
 970
 971 /**
 972  * \brief Authorization required page
 973  * This is probably temporary and should be revisited
 974  * \param message message to put in header
 975 */
 976 void authorization_required(const char *message)
 977 {
 978         wprintf("HTTP/1.1 401 Authorization Required\r\n");
 979         wprintf("WWW-Authenticate: Basic realm=\"\"\r\n", serv_info.serv_humannode);
 980         wprintf("Content-Type: text/html\r\n\r\n");
 981         wprintf("<h1>");
 982         wprintf(_("Authorization Required"));
 983         wprintf("</h1>\r\n");
 984         wprintf(_("The resource you requested requires a valid username and password. "
 985                 "You could not be logged in: %s\n"), message);
 986         wDumpContent(0);
 987 }
 988
 989 /**
 990  * \brief This function is called by the MIME parser to handle data uploaded by
 991  *        the browser.  Form data, uploaded files, and the data from HTTP PUT
 992  *        operations (such as those found in GroupDAV) all arrive this way.
 993  *
 994  * \param name Name of the item being uploaded
 995  * \param filename Filename of the item being uploaded
 996  * \param partnum MIME part identifier (not needed)
 997  * \param disp MIME content disposition (not needed)
 998  * \param content The actual data
 999  * \param cbtype MIME content-type
1000  * \param cbcharset Character set
1001  * \param length Content length
1002  * \param encoding MIME encoding type (not needed)
1003  * \param userdata Not used here
1004  */
1005 void upload_handler(char *name, char *filename, char *partnum, char *disp,
1006                         void *content, char *cbtype, char *cbcharset,
1007                         size_t length, char *encoding, void *userdata)
1008 {
1009         struct urlcontent *u;
1010
1011         lprintf(9, "upload_handler() name=%s, type=%s, len=%d\n", name, cbtype, length);
1012
1013         /* Form fields */
1014         if ( (length > 0) && (IsEmptyStr(cbtype)) ) {
1015                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
1016                 u->next = WC->urlstrings;
1017                 WC->urlstrings = u;
1018                 safestrncpy(u->url_key, name, sizeof(u->url_key));
1019                 u->url_data = malloc(length + 1);
1020                 memcpy(u->url_data, content, length);
1021                 u->url_data[length] = 0;
1022                 /* lprintf(9, "Key: <%s>  Data: <%s>\n", u->url_key, u->url_data); */
1023         }
1024
1025         /** Uploaded files */
1026         if ( (length > 0) && (!IsEmptyStr(cbtype)) ) {
1027                 WC->upload = malloc(length);
1028                 if (WC->upload != NULL) {
1029                         WC->upload_length = length;
1030                         safestrncpy(WC->upload_filename, filename,
1031                                         sizeof(WC->upload_filename));
1032                         safestrncpy(WC->upload_content_type, cbtype,
1033                                         sizeof(WC->upload_content_type));
1034                         memcpy(WC->upload, content, length);
1035                 }
1036                 else {
1037                         lprintf(3, "malloc() failed: %s\n", strerror(errno));
1038                 }
1039         }
1040
1041 }
1042
1043 /**
1044  * \brief Convenience functions to wrap around asynchronous ajax responses
1045  */
1046 void begin_ajax_response(void) {
1047         output_headers(0, 0, 0, 0, 0, 0);
1048
1049         wprintf("Content-type: text/html; charset=UTF-8\r\n"
1050                 "Server: %s\r\n"
1051                 "Connection: close\r\n"
1052                 "Pragma: no-cache\r\n"
1053                 "Cache-Control: no-cache\r\n"
1054                 "Expires: -1\r\n"
1055                 ,
1056                 PACKAGE_STRING);
1057         begin_burst();
1058 }
1059
1060 /**
1061  * \brief print ajax response footer
1062  */
1063 void end_ajax_response(void) {
1064         wprintf("\r\n");
1065         wDumpContent(0);
1066 }
1067
1068 /**
1069  * \brief Wraps a Citadel server command in an AJAX transaction.
1070  */
1071 void ajax_servcmd(void)
1072 {
1073         char buf[1024];
1074         char gcontent[1024];
1075         char *junk;
1076         size_t len;
1077
1078         begin_ajax_response();
1079
1080         serv_printf("%s", bstr("g_cmd"));
1081         serv_getln(buf, sizeof buf);
1082         wprintf("%s\n", buf);
1083
1084         if (buf[0] == '8') {
1085                 serv_printf("\n\n000");
1086         }
1087         if ((buf[0] == '1') || (buf[0] == '8')) {
1088                 while (serv_getln(gcontent, sizeof gcontent), strcmp(gcontent, "000")) {
1089                         wprintf("%s\n", gcontent);
1090                 }
1091                 wprintf("000");
1092         }
1093         if (buf[0] == '4') {
1094                 text_to_server(bstr("g_input"));
1095                 serv_puts("000");
1096         }
1097         if (buf[0] == '6') {
1098                 len = atol(&buf[4]);
1099                 junk = malloc(len);
1100                 serv_read(junk, len);
1101                 free(junk);
1102         }
1103         if (buf[0] == '7') {
1104                 len = atol(&buf[4]);
1105                 junk = malloc(len);
1106                 memset(junk, 0, len);
1107                 serv_write(junk, len);
1108                 free(junk);
1109         }
1110
1111         end_ajax_response();
1112
1113         /**
1114          * This is kind of an ugly hack, but this is the only place it can go.
1115          * If the command was GEXP, then the instant messenger window must be
1116          * running, so reset the "last_pager_check" watchdog timer so
1117          * that page_popup() doesn't try to open it a second time.
1118          */
1119         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
1120                 WC->last_pager_check = time(NULL);
1121         }
1122 }
1123
1124
1125 /**
1126  * \brief Helper function for the asynchronous check to see if we need
1127  * to open the instant messenger window.
1128  */
1129 void seconds_since_last_gexp(void)
1130 {
1131         char buf[256];
1132
1133         begin_ajax_response();
1134         if ( (time(NULL) - WC->last_pager_check) < 30) {
1135                 wprintf("NO\n");
1136         }
1137         else {
1138                 serv_puts("NOOP");
1139                 serv_getln(buf, sizeof buf);
1140                 if (buf[3] == '*') {
1141                         wprintf("YES");
1142                 }
1143                 else {
1144                         wprintf("NO");
1145                 }
1146         }
1147         end_ajax_response();
1148 }
1149
1150
1151
1152
1153 /**
1154  * \brief Entry point for WebCit transaction
1155  */
1156 void session_loop(struct httprequest *req)
1157 {
1158         char cmd[1024];
1159         char action[1024];
1160         char arg[8][128];
1161         size_t sizes[10];
1162         char *index[10];
1163         char buf[SIZ];
1164         char request_method[128];
1165         char pathname[1024];
1166         int a, b, nBackDots, nEmpty;
1167         int ContentLength = 0;
1168         int BytesRead = 0;
1169         char ContentType[512];
1170         char *content = NULL;
1171         char *content_end = NULL;
1172         struct httprequest *hptr;
1173         char browser_host[256];
1174         char user_agent[256];
1175         int body_start = 0;
1176         int is_static = 0;
1177         int n_static = 0;
1178         int len = 0;
1179         /**
1180          * We stuff these with the values coming from the client cookies,
1181          * so we can use them to reconnect a timed out session if we have to.
1182          */
1183         char c_username[SIZ];
1184         char c_password[SIZ];
1185         char c_roomname[SIZ];
1186         char c_httpauth_string[SIZ];
1187         char c_httpauth_user[SIZ];
1188         char c_httpauth_pass[SIZ];
1189         char cookie[SIZ];
1190
1191         safestrncpy(c_username, "", sizeof c_username);
1192         safestrncpy(c_password, "", sizeof c_password);
1193         safestrncpy(c_roomname, "", sizeof c_roomname);
1194         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
1195         safestrncpy(c_httpauth_user, DEFAULT_HTTPAUTH_USER, sizeof c_httpauth_user);
1196         safestrncpy(c_httpauth_pass, DEFAULT_HTTPAUTH_PASS, sizeof c_httpauth_pass);
1197         strcpy(browser_host, "");
1198
1199         WC->upload_length = 0;
1200         WC->upload = NULL;
1201         WC->vars = NULL;
1202         WC->is_wap = 0;
1203
1204         hptr = req;
1205         if (hptr == NULL) return;
1206
1207         safestrncpy(cmd, hptr->line, sizeof cmd);
1208         hptr = hptr->next;
1209         extract_token(request_method, cmd, 0, ' ', sizeof request_method);
1210         extract_token(pathname, cmd, 1, ' ', sizeof pathname);
1211
1212         /** Figure out the action */
1213         index[0] = action;
1214         sizes[0] = sizeof action;
1215         for (a=1; a<9; a++)
1216         {
1217                 index[a] = arg[a-1];
1218                 sizes[a] = sizeof arg[a-1];
1219         }
1220 ////    index[9] = &foo; todo
1221         nBackDots = 0;
1222         nEmpty = 0;
1223         for ( a = 0; a < 9; ++a)
1224         {
1225                 extract_token(index[a], pathname, a + 1, '/', sizes[a]);
1226                 if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
1227                 if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
1228                 if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
1229                 if ((index[a][0] == '.') && (index[a][1] == '.'))
1230                         nBackDots++;
1231                 if (index[a][0] == '\0')
1232                         nEmpty++;
1233         }
1234
1235         while (hptr != NULL) {
1236                 safestrncpy(buf, hptr->line, sizeof buf);
1237                 /* lprintf(9, "HTTP HEADER: %s\n", buf); */
1238                 hptr = hptr->next;
1239
1240                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
1241                         safestrncpy(cookie, &buf[15], sizeof cookie);
1242                         cookie_to_stuff(cookie, NULL,
1243                                         c_username, sizeof c_username,
1244                                         c_password, sizeof c_password,
1245                                         c_roomname, sizeof c_roomname);
1246                 }
1247                 else if (!strncasecmp(buf, "Authorization: Basic ", 21)) {
1248                         CtdlDecodeBase64(c_httpauth_string, &buf[21], strlen(&buf[21]));
1249                         extract_token(c_httpauth_user, c_httpauth_string, 0, ':', sizeof c_httpauth_user);
1250                         extract_token(c_httpauth_pass, c_httpauth_string, 1, ':', sizeof c_httpauth_pass);
1251                 }
1252                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
1253                         ContentLength = atoi(&buf[16]);
1254                 }
1255                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
1256                         safestrncpy(ContentType, &buf[14], sizeof ContentType);
1257                 }
1258                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
1259                         safestrncpy(user_agent, &buf[12], sizeof user_agent);
1260                 }
1261                 else if (!strncasecmp(buf, "X-Forwarded-Host: ", 18)) {
1262                         if (follow_xff) {
1263                                 safestrncpy(WC->http_host, &buf[18], sizeof WC->http_host);
1264                         }
1265                 }
1266                 else if (!strncasecmp(buf, "Host: ", 6)) {
1267                         if (IsEmptyStr(WC->http_host)) {
1268                                 safestrncpy(WC->http_host, &buf[6], sizeof WC->http_host);
1269                         }
1270                 }
1271                 else if (!strncasecmp(buf, "X-Forwarded-For: ", 17)) {
1272                         safestrncpy(browser_host, &buf[17], sizeof browser_host);
1273                         while (num_tokens(browser_host, ',') > 1) {
1274                                 remove_token(browser_host, 0, ',');
1275                         }
1276                         striplt(browser_host);
1277                 }
1278                 /** Only WAP gateways explicitly name this content-type */
1279                 else if (strstr(buf, "text/vnd.wap.wml")) {
1280                         WC->is_wap = 1;
1281                 }
1282         }
1283
1284         if (ContentLength > 0) {
1285                 content = malloc(ContentLength + SIZ);
1286                 memset(content, 0, ContentLength + SIZ);
1287                 snprintf(content,  ContentLength + SIZ, "Content-type: %s\n"
1288                                 "Content-length: %d\n\n",
1289                                 ContentType, ContentLength);
1290                 body_start = strlen(content);
1291
1292                 /** Read the entire input data at once. */
1293                 client_read(WC->http_sock, &content[BytesRead+body_start], ContentLength);
1294
1295                 if (!strncasecmp(ContentType, "application/x-www-form-urlencoded", 33)) {
1296                         addurls(&content[body_start]);
1297                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
1298                         content_end = content + ContentLength + body_start;
1299                         mime_parser(content, content_end, *upload_handler, NULL, NULL, NULL, 0);
1300                 }
1301         } else {
1302                 content = NULL;
1303         }
1304
1305         /** make a note of where we are in case the user wants to save it */
1306         safestrncpy(WC->this_page, cmd, sizeof(WC->this_page));
1307         remove_token(WC->this_page, 2, ' ');
1308         remove_token(WC->this_page, 0, ' ');
1309
1310         /** If there are variables in the URL, we must grab them now */
1311         len = strlen(cmd);
1312         for (a = 0; a < len; ++a) {
1313                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
1314                         for (b = a; b < len; ++b) {
1315                                 if (isspace(cmd[b])){
1316                                         cmd[b] = 0;
1317                                         len = b - 1;
1318                                 }
1319                         }
1320                         addurls(&cmd[a + 1]);
1321                         cmd[a] = 0;
1322                         len = a - 1;
1323                 }
1324         }
1325
1326         /** If it's a "force 404" situation then display the error and bail. */
1327         if (!strcmp(action, "404")) {
1328                 wprintf("HTTP/1.1 404 Not found\r\n");
1329                 wprintf("Content-Type: text/plain\r\n");
1330                 wprintf("\r\n");
1331                 wprintf("Not found\r\n");
1332                 goto SKIP_ALL_THIS_CRAP;
1333         }
1334
1335         /** Static content can be sent without connecting to Citadel. */
1336         is_static = 0;
1337         for (a=0; a<ndirs; ++a) {
1338                 if (!strcasecmp(action, (char*)static_content_dirs[a])) { /* map web to disk location */
1339                         is_static = 1;
1340                         n_static = a;
1341                 }
1342         }
1343         if (is_static) {
1344                 if (nBackDots < 2)
1345                 {
1346                         snprintf(buf, sizeof buf, "%s/%s/%s/%s/%s/%s/%s/%s",
1347                                  static_dirs[n_static],
1348                                  index[1], index[2], index[3], index[4], index[5], index[6], index[7]);
1349                         for (a=0; a<8; ++a) {
1350                                 if (buf[strlen(buf)-1] == '/') {
1351                                         buf[strlen(buf)-1] = 0;
1352                                 }
1353                         }
1354                         for (a = 0; a < strlen(buf); ++a) {
1355                                 if (isspace(buf[a])) {
1356                                         buf[a] = 0;
1357                                 }
1358                         }
1359                         output_static(buf);
1360                 }
1361                 else
1362                 {
1363                         lprintf(9, "Suspicious request. Ignoring.");
1364                         wprintf("HTTP/1.1 404 Security check failed\r\n");
1365                         wprintf("Content-Type: text/plain\r\n");
1366                         wprintf("\r\n");
1367                         wprintf("You have sent a malformed or invalid request.\r\n");
1368                 }
1369                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
1370         }
1371
1372         /* If the client sent a nonce that is incorrect, kill the request. */
1373         if (strlen(bstr("nonce")) > 0) {
1374                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
1375                         bstr("nonce"), WC->nonce);
1376                 if (atoi(bstr("nonce")) != WC->nonce) {
1377                         lprintf(9, "Ignoring request with mismatched nonce.\n");
1378                         wprintf("HTTP/1.1 404 Security check failed\r\n");
1379                         wprintf("Content-Type: text/plain\r\n");
1380                         wprintf("\r\n");
1381                         wprintf("Security check failed.\r\n");
1382                         goto SKIP_ALL_THIS_CRAP;
1383                 }
1384         }
1385
1386         /**
1387          * If we're not connected to a Citadel server, try to hook up the
1388          * connection now.
1389          */
1390         if (!WC->connected) {
1391                 if (!strcasecmp(ctdlhost, "uds")) {
1392                         /* unix domain socket */
1393                         snprintf(buf, SIZ, "%s/citadel.socket", ctdlport);
1394                         WC->serv_sock = uds_connectsock(buf);
1395                 }
1396                 else {
1397                         /* tcp socket */
1398                         WC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
1399                 }
1400
1401                 if (WC->serv_sock < 0) {
1402                         do_logout();
1403                         goto SKIP_ALL_THIS_CRAP;
1404                 }
1405                 else {
1406                         WC->connected = 1;
1407                         serv_getln(buf, sizeof buf);    /** get the server welcome message */
1408
1409                         /**
1410                          * From what host is our user connecting?  Go with
1411                          * the host at the other end of the HTTP socket,
1412                          * unless we are following X-Forwarded-For: headers
1413                          * and such a header has already turned up something.
1414                          */
1415                         if ( (!follow_xff) || (strlen(browser_host) == 0) ) {
1416                                 locate_host(browser_host, WC->http_sock);
1417                         }
1418
1419                         get_serv_info(browser_host, user_agent);
1420                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
1421                                 wprintf(_("You are connected to a Citadel "
1422                                         "server running Citadel %d.%02d. \n"
1423                                         "In order to run this version of WebCit "
1424                                         "you must also have Citadel %d.%02d or"
1425                                         " newer.\n\n\n"),
1426                                                 serv_info.serv_rev_level / 100,
1427                                                 serv_info.serv_rev_level % 100,
1428                                                 MINIMUM_CIT_VERSION / 100,
1429                                                 MINIMUM_CIT_VERSION % 100
1430                                         );
1431                                 end_webcit_session();
1432                                 goto SKIP_ALL_THIS_CRAP;
1433                         }
1434                 }
1435         }
1436
1437         /**
1438          * Functions which can be performed without logging in
1439          */
1440         if (!strcasecmp(action, "listsub")) {
1441                 do_listsub();
1442                 goto SKIP_ALL_THIS_CRAP;
1443         }
1444 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1445         if (!strcasecmp(action, "freebusy")) {
1446                 do_freebusy(cmd);
1447                 goto SKIP_ALL_THIS_CRAP;
1448         }
1449 #endif
1450
1451         /**
1452          * If we're not logged in, but we have HTTP Authentication data,
1453          * try logging in to Citadel using that.
1454          */
1455         if ((!WC->logged_in)
1456            && (strlen(c_httpauth_user) > 0)
1457            && (strlen(c_httpauth_pass) > 0)) {
1458                 serv_printf("USER %s", c_httpauth_user);
1459                 serv_getln(buf, sizeof buf);
1460                 if (buf[0] == '3') {
1461                         serv_printf("PASS %s", c_httpauth_pass);
1462                         serv_getln(buf, sizeof buf);
1463                         if (buf[0] == '2') {
1464                                 become_logged_in(c_httpauth_user,
1465                                                 c_httpauth_pass, buf);
1466                                 safestrncpy(WC->httpauth_user, c_httpauth_user, sizeof WC->httpauth_user);
1467                                 safestrncpy(WC->httpauth_pass, c_httpauth_pass, sizeof WC->httpauth_pass);
1468                         } else {
1469                                 /** Should only display when password is wrong */
1470                                 authorization_required(&buf[4]);
1471                                 goto SKIP_ALL_THIS_CRAP;
1472                         }
1473                 }
1474         }
1475
1476         /** This needs to run early */
1477 #ifdef TECH_PREVIEW
1478         if (!strcasecmp(action, "rss")) {
1479                 display_rss(bstr("room"), request_method);
1480                 goto SKIP_ALL_THIS_CRAP;
1481         }
1482 #endif
1483
1484         /**
1485          * The GroupDAV stuff relies on HTTP authentication instead of
1486          * our session's authentication.
1487          */
1488         if (!strncasecmp(action, "groupdav", 8)) {
1489                 groupdav_main(req, ContentType, /* do GroupDAV methods */
1490                         ContentLength, content+body_start);
1491                 if (!WC->logged_in) {
1492                         WC->killthis = 1;       /* If not logged in, don't */
1493                 }                               /* keep the session active */
1494                 goto SKIP_ALL_THIS_CRAP;
1495         }
1496
1497
1498         /**
1499          * Automatically send requests with any method other than GET or
1500          * POST to the GroupDAV code as well.
1501          */
1502         if ((strcasecmp(request_method, "GET")) && (strcasecmp(request_method, "POST"))) {
1503                 groupdav_main(req, ContentType, /** do GroupDAV methods */
1504                         ContentLength, content+body_start);
1505                 if (!WC->logged_in) {
1506                         WC->killthis = 1;       /** If not logged in, don't */
1507                 }                               /** keep the session active */
1508                 goto SKIP_ALL_THIS_CRAP;
1509         }
1510
1511         /**
1512          * If we're not logged in, but we have username and password cookies
1513          * supplied by the browser, try using them to log in.
1514          */
1515         if ((!WC->logged_in)
1516            && (!IsEmptyStr(c_username))
1517            && (!IsEmptyStr(c_password))) {
1518                 serv_printf("USER %s", c_username);
1519                 serv_getln(buf, sizeof buf);
1520                 if (buf[0] == '3') {
1521                         serv_printf("PASS %s", c_password);
1522                         serv_getln(buf, sizeof buf);
1523                         if (buf[0] == '2') {
1524                                 become_logged_in(c_username, c_password, buf);
1525                         }
1526                 }
1527         }
1528         /**
1529          * If we don't have a current room, but a cookie specifying the
1530          * current room is supplied, make an effort to go there.
1531          */
1532         if ((IsEmptyStr(WC->wc_roomname)) && (!IsEmptyStr(c_roomname))) {
1533                 serv_printf("GOTO %s", c_roomname);
1534                 serv_getln(buf, sizeof buf);
1535                 if (buf[0] == '2') {
1536                         safestrncpy(WC->wc_roomname, c_roomname, sizeof WC->wc_roomname);
1537                 }
1538         }
1539
1540         if (!strcasecmp(action, "image")) {
1541                 output_image();
1542
1543                 /**
1544                  * All functions handled below this point ... make sure we log in
1545                  * before doing anything else!
1546                  */
1547         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
1548                 do_login();
1549         } else if (!WC->logged_in) {
1550                 display_login(NULL);
1551         }
1552
1553         /**
1554          * Various commands...
1555          */
1556
1557         else if (!strcasecmp(action, "do_welcome")) {
1558                 do_welcome();
1559         } else if (!strcasecmp(action, "blank")) {
1560                 blank_page();
1561         } else if (!strcasecmp(action, "do_template")) {
1562                 url_do_template();
1563         } else if (!strcasecmp(action, "display_aide_menu")) {
1564                 display_aide_menu();
1565         } else if (!strcasecmp(action, "server_shutdown")) {
1566                 display_shutdown();
1567         } else if (!strcasecmp(action, "display_main_menu")) {
1568                 display_main_menu();
1569         } else if (!strcasecmp(action, "who")) {
1570                 who();
1571         } else if (!strcasecmp(action, "sslg")) {
1572                 seconds_since_last_gexp();
1573         } else if (!strcasecmp(action, "who_inner_html")) {
1574                 begin_ajax_response();
1575                 who_inner_div();
1576                 end_ajax_response();
1577         } else if (!strcasecmp(action, "wholist_section")) {
1578                 begin_ajax_response();
1579                 wholist_section();
1580                 end_ajax_response();
1581         } else if (!strcasecmp(action, "new_messages_html")) {
1582                 begin_ajax_response();
1583                 new_messages_section();
1584                 end_ajax_response();
1585         } else if (!strcasecmp(action, "tasks_inner_html")) {
1586                 begin_ajax_response();
1587                 tasks_section();
1588                 end_ajax_response();
1589         } else if (!strcasecmp(action, "calendar_inner_html")) {
1590                 begin_ajax_response();
1591                 calendar_section();
1592                 end_ajax_response();
1593         } else if (!strcasecmp(action, "mini_calendar")) {
1594                 begin_ajax_response();
1595                 ajax_mini_calendar();
1596                 end_ajax_response();
1597         } else if (!strcasecmp(action, "iconbar_ajax_menu")) {
1598                 begin_ajax_response();
1599                 do_iconbar();
1600                 end_ajax_response();
1601         } else if (!strcasecmp(action, "iconbar_ajax_rooms")) {
1602                 begin_ajax_response();
1603                 do_iconbar_roomlist();
1604                 end_ajax_response();
1605         } else if (!strcasecmp(action, "knrooms")) {
1606                 knrooms();
1607         } else if (!strcasecmp(action, "gotonext")) {
1608                 slrp_highest();
1609                 gotonext();
1610         } else if (!strcasecmp(action, "skip")) {
1611                 gotonext();
1612         } else if (!strcasecmp(action, "ungoto")) {
1613                 ungoto();
1614         } else if (!strcasecmp(action, "dotgoto")) {
1615                 if (WC->wc_view != VIEW_MAILBOX) {      /* dotgoto acts like dotskip when we're in a mailbox view */
1616                         slrp_highest();
1617                 }
1618                 smart_goto(bstr("room"));
1619         } else if (!strcasecmp(action, "dotskip")) {
1620                 smart_goto(bstr("room"));
1621         } else if (!strcasecmp(action, "termquit")) {
1622                 do_logout();
1623         } else if (!strcasecmp(action, "readnew")) {
1624                 readloop("readnew");
1625         } else if (!strcasecmp(action, "readold")) {
1626                 readloop("readold");
1627         } else if (!strcasecmp(action, "readfwd")) {
1628                 readloop("readfwd");
1629         } else if (!strcasecmp(action, "headers")) {
1630                 readloop("headers");
1631         } else if (!strcasecmp(action, "do_search")) {
1632                 readloop("do_search");
1633         } else if (!strcasecmp(action, "msg")) {
1634                 embed_message(index[1]);
1635         } else if (!strcasecmp(action, "printmsg")) {
1636                 print_message(index[1]);
1637         } else if (!strcasecmp(action, "msgheaders")) {
1638                 display_headers(index[1]);
1639         } else if (!strcasecmp(action, "wiki")) {
1640                 display_wiki_page();
1641         } else if (!strcasecmp(action, "display_enter")) {
1642                 display_enter();
1643         } else if (!strcasecmp(action, "post")) {
1644                 post_message();
1645         } else if (!strcasecmp(action, "move_msg")) {
1646                 move_msg();
1647         } else if (!strcasecmp(action, "delete_msg")) {
1648                 delete_msg();
1649         } else if (!strcasecmp(action, "userlist")) {
1650                 userlist();
1651         } else if (!strcasecmp(action, "showuser")) {
1652                 showuser();
1653         } else if (!strcasecmp(action, "display_page")) {
1654                 display_page();
1655         } else if (!strcasecmp(action, "page_user")) {
1656                 page_user();
1657         } else if (!strcasecmp(action, "chat")) {
1658                 do_chat();
1659         } else if (!strcasecmp(action, "display_private")) {
1660                 display_private("", 0);
1661         } else if (!strcasecmp(action, "goto_private")) {
1662                 goto_private();
1663         } else if (!strcasecmp(action, "zapped_list")) {
1664                 zapped_list();
1665         } else if (!strcasecmp(action, "display_zap")) {
1666                 display_zap();
1667         } else if (!strcasecmp(action, "zap")) {
1668                 zap();
1669         } else if (!strcasecmp(action, "display_entroom")) {
1670                 display_entroom();
1671         } else if (!strcasecmp(action, "entroom")) {
1672                 entroom();
1673         } else if (!strcasecmp(action, "display_whok")) {
1674                 display_whok();
1675         } else if (!strcasecmp(action, "do_invt_kick")) {
1676                 do_invt_kick();
1677         } else if (!strcasecmp(action, "display_editroom")) {
1678                 display_editroom();
1679         } else if (!strcasecmp(action, "netedit")) {
1680                 netedit();
1681         } else if (!strcasecmp(action, "editroom")) {
1682                 editroom();
1683         } else if (!strcasecmp(action, "display_editinfo")) {
1684                 display_edit(_("Room info"), "EINF 0", "RINF", "editinfo", 1);
1685         } else if (!strcasecmp(action, "editinfo")) {
1686                 save_edit(_("Room info"), "EINF 1", 1);
1687         } else if (!strcasecmp(action, "display_editbio")) {
1688                 snprintf(buf, SIZ, "RBIO %s", WC->wc_fullname);
1689                 display_edit(_("Your bio"), "NOOP", buf, "editbio", 3);
1690         } else if (!strcasecmp(action, "editbio")) {
1691                 save_edit(_("Your bio"), "EBIO", 0);
1692         } else if (!strcasecmp(action, "confirm_move_msg")) {
1693                 confirm_move_msg();
1694         } else if (!strcasecmp(action, "delete_room")) {
1695                 delete_room();
1696         } else if (!strcasecmp(action, "validate")) {
1697                 validate();
1698         } else if (!strcasecmp(action, "display_editpic")) {
1699                 display_graphics_upload(_("your photo"),
1700                                         "UIMG 0|_userpic_",
1701                                         "editpic");
1702         } else if (!strcasecmp(action, "editpic")) {
1703                 do_graphics_upload("UIMG 1|_userpic_");
1704         } else if (!strcasecmp(action, "display_editroompic")) {
1705                 display_graphics_upload(_("the icon for this room"),
1706                                         "UIMG 0|_roompic_",
1707                                         "editroompic");
1708         } else if (!strcasecmp(action, "editroompic")) {
1709                 do_graphics_upload("UIMG 1|_roompic_");
1710         } else if (!strcasecmp(action, "delete_floor")) {
1711                 delete_floor();
1712         } else if (!strcasecmp(action, "rename_floor")) {
1713                 rename_floor();
1714         } else if (!strcasecmp(action, "create_floor")) {
1715                 create_floor();
1716         } else if (!strcasecmp(action, "display_editfloorpic")) {
1717                 snprintf(buf, SIZ, "UIMG 0|_floorpic_|%s",
1718                         bstr("which_floor"));
1719                 display_graphics_upload(_("the icon for this floor"),
1720                                         buf,
1721                                         "editfloorpic");
1722         } else if (!strcasecmp(action, "editfloorpic")) {
1723                 snprintf(buf, SIZ, "UIMG 1|_floorpic_|%s",
1724                         bstr("which_floor"));
1725                 do_graphics_upload(buf);
1726         } else if (!strcasecmp(action, "display_reg")) {
1727                 display_reg(0);
1728         } else if (!strcasecmp(action, "display_changepw")) {
1729                 display_changepw();
1730         } else if (!strcasecmp(action, "changepw")) {
1731                 changepw();
1732         } else if (!strcasecmp(action, "display_edit_node")) {
1733                 display_edit_node();
1734         } else if (!strcasecmp(action, "edit_node")) {
1735                 edit_node();
1736         } else if (!strcasecmp(action, "display_netconf")) {
1737                 display_netconf();
1738         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
1739                 display_confirm_delete_node();
1740         } else if (!strcasecmp(action, "delete_node")) {
1741                 delete_node();
1742         } else if (!strcasecmp(action, "display_add_node")) {
1743                 display_add_node();
1744         } else if (!strcasecmp(action, "terminate_session")) {
1745                 slrp_highest();
1746                 terminate_session();
1747         } else if (!strcasecmp(action, "edit_me")) {
1748                 edit_me();
1749         } else if (!strcasecmp(action, "display_siteconfig")) {
1750                 display_siteconfig();
1751         } else if (!strcasecmp(action, "chat_recv")) {
1752                 chat_recv();
1753         } else if (!strcasecmp(action, "chat_send")) {
1754                 chat_send();
1755         } else if (!strcasecmp(action, "siteconfig")) {
1756                 siteconfig();
1757         } else if (!strcasecmp(action, "display_generic")) {
1758                 display_generic();
1759         } else if (!strcasecmp(action, "do_generic")) {
1760                 do_generic();
1761         } else if (!strcasecmp(action, "ajax_servcmd")) {
1762                 ajax_servcmd();
1763         } else if (!strcasecmp(action, "display_menubar")) {
1764                 display_menubar(1);
1765         } else if (!strcasecmp(action, "mimepart")) {
1766                 mimepart(index[1], index[2], 0);
1767         } else if (!strcasecmp(action, "mimepart_download")) {
1768                 mimepart(index[1], index[2], 1);
1769         } else if (!strcasecmp(action, "edit_vcard")) {
1770                 edit_vcard();
1771         } else if (!strcasecmp(action, "submit_vcard")) {
1772                 submit_vcard();
1773         } else if (!strcasecmp(action, "select_user_to_edit")) {
1774                 select_user_to_edit(NULL, NULL);
1775         } else if (!strcasecmp(action, "display_edituser")) {
1776                 display_edituser(NULL, 0);
1777         } else if (!strcasecmp(action, "edituser")) {
1778                 edituser();
1779         } else if (!strcasecmp(action, "create_user")) {
1780                 create_user();
1781         } else if (!strcasecmp(action, "changeview")) {
1782                 change_view();
1783         } else if (!strcasecmp(action, "change_start_page")) {
1784                 change_start_page();
1785         } else if (!strcasecmp(action, "display_floorconfig")) {
1786                 display_floorconfig(NULL);
1787         } else if (!strcasecmp(action, "toggle_self_service")) {
1788                 toggle_self_service();
1789 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1790         } else if (!strcasecmp(action, "display_edit_task")) {
1791                 display_edit_task();
1792         } else if (!strcasecmp(action, "save_task")) {
1793                 save_task();
1794         } else if (!strcasecmp(action, "display_edit_event")) {
1795                 display_edit_event();
1796         } else if (!strcasecmp(action, "save_event")) {
1797                 save_event();
1798         } else if (!strcasecmp(action, "respond_to_request")) {
1799                 respond_to_request();
1800         } else if (!strcasecmp(action, "handle_rsvp")) {
1801                 handle_rsvp();
1802 #endif
1803         } else if (!strcasecmp(action, "summary")) {
1804                 summary();
1805         } else if (!strcasecmp(action, "summary_inner_div")) {
1806                 begin_ajax_response();
1807                 summary_inner_div();
1808                 end_ajax_response();
1809         } else if (!strcasecmp(action, "display_customize_iconbar")) {
1810                 display_customize_iconbar();
1811         } else if (!strcasecmp(action, "commit_iconbar")) {
1812                 commit_iconbar();
1813         } else if (!strcasecmp(action, "set_room_policy")) {
1814                 set_room_policy();
1815         } else if (!strcasecmp(action, "display_inetconf")) {
1816                 display_inetconf();
1817         } else if (!strcasecmp(action, "save_inetconf")) {
1818                 save_inetconf();
1819         } else if (!strcasecmp(action, "display_smtpqueue")) {
1820                 display_smtpqueue();
1821         } else if (!strcasecmp(action, "display_smtpqueue_inner_div")) {
1822                 display_smtpqueue_inner_div();
1823         } else if (!strcasecmp(action, "display_sieve")) {
1824                 display_sieve();
1825         } else if (!strcasecmp(action, "save_sieve")) {
1826                 save_sieve();
1827         } else if (!strcasecmp(action, "display_pushemail")) {
1828                 display_pushemail();
1829         } else if (!strcasecmp(action, "save_pushemail")) {
1830                 save_pushemail();
1831         } else if (!strcasecmp(action, "display_add_remove_scripts")) {
1832                 display_add_remove_scripts(NULL);
1833         } else if (!strcasecmp(action, "create_script")) {
1834                 create_script();
1835         } else if (!strcasecmp(action, "delete_script")) {
1836                 delete_script();
1837         } else if (!strcasecmp(action, "setup_wizard")) {
1838                 do_setup_wizard();
1839         } else if (!strcasecmp(action, "display_preferences")) {
1840                 display_preferences();
1841         } else if (!strcasecmp(action, "set_preferences")) {
1842                 set_preferences();
1843         } else if (!strcasecmp(action, "recp_autocomplete")) {
1844                 recp_autocomplete(bstr("recp"));
1845         } else if (!strcasecmp(action, "cc_autocomplete")) {
1846                 recp_autocomplete(bstr("cc"));
1847         } else if (!strcasecmp(action, "bcc_autocomplete")) {
1848                 recp_autocomplete(bstr("bcc"));
1849         } else if (!strcasecmp(action, "display_address_book_middle_div")) {
1850                 display_address_book_middle_div();
1851         } else if (!strcasecmp(action, "display_address_book_inner_div")) {
1852                 display_address_book_inner_div();
1853         } else if (!strcasecmp(action, "set_floordiv_expanded")) {
1854                 set_floordiv_expanded(index[1]);
1855         } else if (!strcasecmp(action, "diagnostics")) {
1856                 output_headers(1, 1, 1, 0, 0, 0);
1857                 wprintf("Session: %d<hr />\n", WC->wc_session);
1858                 wprintf("Command: <br /><PRE>\n");
1859                 escputs(cmd);
1860                 wprintf("</PRE><hr />\n");
1861                 wprintf("Variables: <br /><PRE>\n");
1862                 dump_vars();
1863                 wprintf("</PRE><hr />\n");
1864                 wDumpContent(1);
1865         } else if (!strcasecmp(action, "updatenote")) {
1866                 updatenote();
1867         } else if (!strcasecmp(action, "display_room_directory")) {
1868                 display_room_directory();
1869         } else if (!strcasecmp(action, "download_file")) {
1870                 download_file(index[1]);
1871         } else if (!strcasecmp(action, "upload_file")) {
1872                 upload_file();
1873         }
1874
1875         /** When all else fais, display the main menu. */
1876         else {
1877                 display_main_menu();
1878         }
1879
1880 SKIP_ALL_THIS_CRAP:
1881         fflush(stdout);
1882         if (content != NULL) {
1883                 free(content);
1884                 content = NULL;
1885         }
1886         free_urls();
1887         if (WC->upload_length > 0) {
1888                 free(WC->upload);
1889                 WC->upload_length = 0;
1890         }
1891 }
1892
1893 /**
1894  * \brief Replacement for sleep() that uses select() in order to avoid SIGALRM
1895  * \param seconds how many seconds should we sleep?
1896  */
1897 void sleeeeeeeeeep(int seconds)
1898 {
1899         struct timeval tv;
1900
1901         tv.tv_sec = seconds;
1902         tv.tv_usec = 0;
1903         select(0, NULL, NULL, NULL, &tv);
1904 }
1905
1906
1907 /*@}*/