webcit/webcit.c

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