webcit/webcit.c

   1 /*
   2  * webcit.c
   3  *
   4  * This is the actual program called by the webserver.  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  * $Id$
   9  */
  10
  11 #include <ctype.h>
  12 #include <stdlib.h>
  13 #include <unistd.h>
  14 #include <stdio.h>
  15 #include <fcntl.h>
  16 #include <signal.h>
  17 #include <sys/types.h>
  18 #include <sys/wait.h>
  19 #include <sys/socket.h>
  20 #include <sys/time.h>
  21 #include <sys/stat.h>
  22 #include <limits.h>
  23 #include <netinet/in.h>
  24 #include <netdb.h>
  25 #include <string.h>
  26 #include <pwd.h>
  27 #include <errno.h>
  28 #include <stdarg.h>
  29 #include <pthread.h>
  30 #include <signal.h>
  31 #include "webcit.h"
  32
  33
  34
  35 char *ExpressMessages = NULL;   /* FIX move to session context */
  36
  37 /* This variable is set to 1 if the room banner and menubar have been
  38  * displayed, and we need to close the <TABLE> tags.
  39  */
  40 int fake_frames = 0;    /* FIX move to session context */
  41
  42 struct urlcontent *urlstrings = NULL;
  43
  44
  45 void unescape_input(char *buf)
  46 {
  47         int a, b;
  48         char hex[3];
  49
  50         while ((isspace(buf[strlen(buf) - 1])) && (strlen(buf) > 0))
  51                 buf[strlen(buf) - 1] = 0;
  52
  53         for (a = 0; a < strlen(buf); ++a) {
  54                 if (buf[a] == '+')
  55                         buf[a] = ' ';
  56                 if (buf[a] == '%') {
  57                         hex[0] = buf[a + 1];
  58                         hex[1] = buf[a + 2];
  59                         hex[2] = 0;
  60                         sscanf(hex, "%02x", &b);
  61                         buf[a] = (char) b;
  62                         strcpy(&buf[a + 1], &buf[a + 3]);
  63                 }
  64         }
  65
  66 }
  67
  68
  69 void addurls(char *url)
  70 {
  71         char *up, *ptr;
  72         char buf[256];
  73         int a, b;
  74         struct urlcontent *u;
  75
  76         up = url;
  77         while (strlen(up) > 0) {
  78
  79                 /* locate the = sign */
  80                 strncpy(buf, up, 255);
  81                 b = (-1);
  82                 for (a = 255; a >= 0; --a)
  83                         if (buf[a] == '=')
  84                                 b = a;
  85                 if (b < 0)
  86                         return;
  87                 buf[b] = 0;
  88
  89                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
  90                 u->next = urlstrings;
  91                 urlstrings = u;
  92                 strcpy(u->url_key, buf);
  93
  94                 /* now chop that part off */
  95                 for (a = 0; a <= b; ++a)
  96                         ++up;
  97
  98                 /* locate the & sign */
  99                 ptr = up;
 100                 b = strlen(up);
 101                 for (a = 0; a < strlen(up); ++a) {
 102                         if (!strncmp(ptr, "&", 1)) {
 103                                 b = a;
 104                                 break;
 105                         }
 106                         ++ptr;
 107                 }
 108                 ptr = up;
 109                 for (a = 0; a < b; ++a)
 110                         ++ptr;
 111                 strcpy(ptr, "");
 112
 113                 u->url_data = malloc(strlen(up) + 1);
 114                 strcpy(u->url_data, up);
 115                 u->url_data[b] = 0;
 116                 unescape_input(u->url_data);
 117                 up = ptr;
 118                 ++up;
 119         }
 120 }
 121
 122 void free_urls(void)
 123 {
 124         struct urlcontent *u;
 125
 126         while (urlstrings != NULL) {
 127                 free(urlstrings->url_data);
 128                 u = urlstrings->next;
 129                 free(urlstrings);
 130                 urlstrings = u;
 131         }
 132 }
 133
 134 /*
 135  * Diagnostic function to display the contents of all variables
 136  */
 137 void dump_vars(void)
 138 {
 139         struct urlcontent *u;
 140
 141         for (u = urlstrings; u != NULL; u = u->next) {
 142                 wprintf("%38s = %s\n", u->url_key, u->url_data);
 143         }
 144 }
 145
 146 char *bstr(char *key)
 147 {
 148         struct urlcontent *u;
 149
 150         for (u = urlstrings; u != NULL; u = u->next) {
 151                 if (!strcasecmp(u->url_key, key))
 152                         return (u->url_data);
 153         }
 154         return ("");
 155 }
 156
 157
 158 void wprintf(const char *format,...)
 159 {
 160         va_list arg_ptr;
 161         char wbuf[1024];
 162
 163         va_start(arg_ptr, format);
 164         vsprintf(wbuf, format, arg_ptr);
 165         va_end(arg_ptr);
 166
 167         write(WC->http_sock, wbuf, strlen(wbuf));
 168 }
 169
 170
 171 /*
 172  * wDumpContent() wraps up an HTTP session, closes tags, etc.
 173  *
 174  * print_standard_html_footer should be set to 0 to transmit only, 1 to
 175  * append the main menu and closing tags, or 2 to
 176  * append the closing tags only.
 177  */
 178 void wDumpContent(int print_standard_html_footer)
 179 {
 180         if (fake_frames) {
 181                 wprintf("<CENTER><FONT SIZE=-1>"
 182                         "<TABLE border=0 width=100%><TR>"
 183                         "<TD><A HREF=\"/ungoto\">"
 184                         "<IMG SRC=\"/static/back.gif\" BORDER=0>"
 185                         "Ungoto</A></TD>");
 186                 wprintf("<TD><A HREF=\"#TheTop\">"
 187                         "<IMG SRC=\"/static/up.gif\" BORDER=0>"
 188                         "Top of page</A></TD>");
 189                 wprintf("<TD><A HREF=\"/display_enter\">"
 190                         "<IMG SRC=\"/static/enter.gif\" BORDER=0>"
 191                         "Enter a message</A></TD>");
 192                 wprintf("<TD><A HREF=\"/gotonext\">"
 193                         "Goto next room"
 194                         "<IMG SRC=\"/static/forward.gif\" BORDER=0></A></TD>"
 195                         "</TR></TABLE>"
 196                         "</FONT>\n"
 197                         "</TD></TR></TABLE></TABLE>\n");
 198                 fake_frames = 0;
 199         }
 200
 201         if (print_standard_html_footer) {
 202                 if (print_standard_html_footer != 2) {
 203                         wprintf("<BR>");
 204                 }
 205                 wprintf("</BODY></HTML>\n");
 206         }
 207
 208
 209 }
 210
 211
 212 void escputs1(char *strbuf, int nbsp)
 213 {
 214         int a;
 215
 216         for (a = 0; a < strlen(strbuf); ++a) {
 217                 if (strbuf[a] == '<')
 218                         wprintf("&lt;");
 219                 else if (strbuf[a] == '>')
 220                         wprintf("&gt;");
 221                 else if (strbuf[a] == '&')
 222                         wprintf("&amp;");
 223                 else if (strbuf[a] == '\"')
 224                         wprintf("&quot;");
 225                 else if (strbuf[a] == '\'')
 226                         wprintf("&#39;");
 227                 else if (strbuf[a] == LB)
 228                         wprintf("<");
 229                 else if (strbuf[a] == RB)
 230                         wprintf(">");
 231                 else if (strbuf[a] == QU)
 232                         wprintf("\"");
 233                 else if ((strbuf[a] == 32) && (nbsp == 1)) {
 234                         wprintf("&nbsp;");
 235                 } else {
 236                         wprintf("%c", strbuf[a]);
 237                 }
 238         }
 239 }
 240
 241 void escputs(char *strbuf)
 242 {
 243         escputs1(strbuf, 0);
 244 }
 245
 246
 247
 248 char *urlesc(char *strbuf)
 249 {
 250         int a, b, c;
 251         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 252         static char outbuf[512];
 253
 254         strcpy(outbuf, "");
 255
 256         for (a = 0; a < strlen(strbuf); ++a) {
 257                 c = 0;
 258                 for (b = 0; b < strlen(ec); ++b) {
 259                         if (strbuf[a] == ec[b])
 260                                 c = 1;
 261                 }
 262                 b = strlen(outbuf);
 263                 if (c == 1)
 264                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 265                 else
 266                         sprintf(&outbuf[b], "%c", strbuf[a]);
 267         }
 268         return (outbuf);
 269 }
 270
 271 void urlescputs(char *strbuf)
 272 {
 273         wprintf("%s", urlesc(strbuf));
 274 }
 275
 276
 277
 278
 279 /*
 280  * Output all that important stuff that the browser will want to see
 281  *
 282  * print_standard_html_head values:
 283  * 0 = Nothing.  Do not display any leading HTTP or HTML.
 284  * 1 = HTTP headers plus the "fake frames" found in most windows.
 285  * 2 = HTTP headers required to terminate the session (unset cookies)
 286  * 3 = HTTP headers only.
 287  */
 288 void output_headers(int print_standard_html_head)
 289 {
 290
 291         static char *unset = "; expires=28-May-1971 18:10:00 GMT";
 292         char cookie[256];
 293
 294         wprintf("HTTP/1.0 200 OK\n");
 295
 296         if (print_standard_html_head > 0) {
 297                 wprintf("Content-type: text/html\n");
 298                 wprintf("Server: %s\n", SERVER);
 299                 wprintf("Connection: close\n");
 300                 wprintf("Pragma: no-cache\n");
 301                 wprintf("Cache-Control: no-store\n");
 302         }
 303         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 304                         WC->wc_password, WC->wc_roomname);
 305         if (print_standard_html_head == 2) {
 306                 wprintf("X-WebCit-Session: close\n");
 307                 wprintf("Set-cookie: webcit=%s\n", unset);
 308         } else {
 309                 wprintf("Set-cookie: webcit=%s\n", cookie);
 310         }
 311
 312         if (print_standard_html_head > 0) {
 313                 wprintf("\n");
 314                 wprintf("<HTML><HEAD><TITLE>");
 315                 escputs(serv_info.serv_humannode);
 316                 wprintf("</TITLE>\n"
 317                         "<META HTTP-EQUIV=\"Pragma\" CONTENT=\"no-cache\">\n"
 318                         "</HEAD>\n");
 319                 if (ExpressMessages != NULL) {
 320                         wprintf("<SCRIPT language=\"javascript\">\n");
 321                         wprintf("function ExpressMessage() {\n");
 322                         wprintf(" alert(\"");
 323                         escputs(ExpressMessages);
 324                         wprintf("\")\n");
 325                         wprintf(" }\n </SCRIPT>\n");
 326                 }
 327
 328
 329
 330                 /* JavaScript key-based navigation would go here if it
 331                  * were finished
 332                  */
 333
 334                 wprintf("<BODY ");
 335                 if (ExpressMessages != NULL) {
 336                         wprintf("onload=\"ExpressMessage()\" ");
 337                         free(ExpressMessages);
 338                         ExpressMessages = NULL;
 339                 }
 340                 wprintf("BACKGROUND=\"/image&name=background\" TEXT=\"#000000\" LINK=\"#004400\">\n");
 341
 342
 343         if (print_standard_html_head == 1) {
 344                 wprintf("<A NAME=\"TheTop\"></A>"
 345                         "<TABLE border=0 width=100%>"
 346                         "<TR VALIGN=TOP><TD>");
 347
 348                 display_menubar(0);
 349
 350                 wprintf("</TD><TD VALIGN=TOP>"
 351                         "<TABLE border=0 width=100%><TR VALIGN=TOP>"
 352                         "<TD>\n");
 353
 354                 embed_room_banner(NULL);
 355
 356                 wprintf("</TD></TR><TR VALIGN=TOP><TD>\n");
 357
 358                 fake_frames = 1;
 359                 }
 360         }
 361 }
 362
 363
 364
 365 void ExpressMessageCat(char *buf) {
 366         if (ExpressMessages == NULL) {
 367                 ExpressMessages = malloc(strlen(buf) + 4);
 368                 strcpy(ExpressMessages, "");
 369         } else {
 370                 ExpressMessages = realloc(ExpressMessages,
 371                         (strlen(ExpressMessages) + strlen(buf) + 4));
 372         }
 373         strcat(ExpressMessages, buf);
 374         strcat(ExpressMessages, "\\n");
 375 }
 376
 377
 378 void check_for_express_messages()
 379 {
 380         char buf[256];
 381
 382         serv_puts("PEXP");
 383         serv_gets(buf);
 384         if (buf[0] == '1') {
 385                 while (serv_gets(buf), strcmp(buf, "000")) {
 386                         ExpressMessageCat(buf);
 387                 }
 388         }
 389 }
 390
 391
 392
 393
 394 void output_static(char *what)
 395 {
 396         char buf[4096];
 397         long thisblock;
 398         FILE *fp;
 399         struct stat statbuf;
 400         off_t bytes;
 401
 402         sprintf(buf, "static/%s", what);
 403         fp = fopen(buf, "rb");
 404         if (fp == NULL) {
 405                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 406                 wprintf("Content-Type: text/plain\n");
 407                 wprintf("\n");
 408                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 409         } else {
 410                 output_headers(0);
 411
 412                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 413                         wprintf("Content-type: image/gif\n");
 414                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 415                         wprintf("Content-type: text/plain\n");
 416                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 417                         wprintf("Content-type: image/jpeg\n");
 418                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 419                         wprintf("Content-type: text/html\n");
 420                 else
 421                         wprintf("Content-type: application/octet-stream\n");
 422
 423                 fstat(fileno(fp), &statbuf);
 424                 bytes = statbuf.st_size;
 425                 fprintf(stderr, "Static: %s, %ld bytes\n", what, bytes);
 426                 wprintf("Content-length: %ld\n", (long) bytes);
 427                 wprintf("\n");
 428                 while (bytes > 0) {
 429                         thisblock = sizeof(buf);
 430                         if (thisblock > bytes) thisblock = bytes;
 431                         fread(buf, thisblock, 1, fp);
 432                         write(WC->http_sock, buf, thisblock);
 433                         bytes = bytes - thisblock;
 434                 }
 435                 fclose(fp);
 436         }
 437 }
 438
 439 /*
 440  * When the browser requests an image file from the Citadel server,
 441  * this function is called to transmit it.
 442  */
 443 void output_image()
 444 {
 445         char buf[256];
 446         char xferbuf[4096];
 447         off_t bytes;
 448         off_t thisblock;
 449         off_t accomplished = 0L;
 450
 451
 452         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 453         serv_gets(buf);
 454         if (buf[0] == '2') {
 455                 bytes = extract_long(&buf[4], 0);
 456                 output_headers(0);
 457                 wprintf("Content-type: image/gif\n");
 458                 wprintf("Content-length: %ld\n", (long) bytes);
 459                 wprintf("\n");
 460
 461                 while (bytes > (off_t) 0) {
 462                         thisblock = (off_t) sizeof(xferbuf);
 463                         if (thisblock > bytes)
 464                                 thisblock = bytes;
 465                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 466                         serv_gets(buf);
 467                         if (buf[0] == '6')
 468                                 thisblock = extract_long(&buf[4], 0);
 469                         serv_read(xferbuf, (int) thisblock);
 470                         write(WC->http_sock, xferbuf, thisblock);
 471                         bytes = bytes - thisblock;
 472                         accomplished = accomplished + thisblock;
 473                 }
 474                 serv_puts("CLOS");
 475                 serv_gets(buf);
 476         } else {
 477                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 478                 output_headers(0);
 479                 wprintf("Content-Type: text/plain\n");
 480                 wprintf("\n");
 481                 wprintf("Error retrieving image\n");
 482         }
 483
 484 }
 485
 486
 487 /*
 488  * Convenience functions to display a page containing only a string
 489  */
 490 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 491 {
 492         wprintf("HTTP/1.0 200 OK\n");
 493         output_headers(1);
 494         wprintf("<TABLE WIDTH=100% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
 495         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 496         wprintf("<B>%s</B>\n", titlebarmsg);
 497         wprintf("</FONT></TD></TR></TABLE><BR>\n");
 498         escputs(messagetext);
 499
 500         wprintf("<HR>\n");
 501         embed_main_menu();
 502         wDumpContent(1);
 503 }
 504
 505 void display_error(char *errormessage)
 506 {
 507         convenience_page("770000", "Error", errormessage);
 508 }
 509
 510 void display_success(char *successmessage)
 511 {
 512         convenience_page("007700", "OK", successmessage);
 513 }
 514
 515
 516
 517 void extract_action(char *actbuf, char *cmdbuf)
 518 {
 519         int i;
 520
 521         strcpy(actbuf, cmdbuf);
 522         if (!strncasecmp(actbuf, "GET /", 5))
 523                 strcpy(actbuf, &actbuf[5]);
 524         if (!strncasecmp(actbuf, "PUT /", 5))
 525                 strcpy(actbuf, &actbuf[5]);
 526         if (!strncasecmp(actbuf, "POST /", 6))
 527                 strcpy(actbuf, &actbuf[6]);
 528
 529         for (i = 0; i < strlen(actbuf); ++i) {
 530                 if (actbuf[i] == ' ') {
 531                         actbuf[i] = 0;
 532                         i = 0;
 533                 }
 534                 if (actbuf[i] == '/') {
 535                         actbuf[i] = 0;
 536                         i = 0;
 537                 }
 538                 if (actbuf[i] == '?') {
 539                         actbuf[i] = 0;
 540                         i = 0;
 541                 }
 542                 if (actbuf[i] == '&') {
 543                         actbuf[i] = 0;
 544                         i = 0;
 545                 }
 546         }
 547 }
 548
 549
 550 void upload_handler(char *name, char *filename, char *encoding,
 551                     void *content, char *cbtype, size_t length)
 552 {
 553
 554         fprintf(stderr, "UPLOAD HANDLER CALLED\n");
 555         fprintf(stderr, "    name = %s\n", name);
 556         fprintf(stderr, "filename = %s\n", filename);
 557         fprintf(stderr, "encoding = %s\n", encoding);
 558         fprintf(stderr, "    type = %s\n", cbtype);
 559         fprintf(stderr, "  length = %d\n", length);
 560
 561         if (strlen(name) > 0) {
 562                 WC->upload = malloc(length);
 563                 if (WC->upload != NULL) {
 564                         WC->upload_length = length;
 565                         memcpy(WC->upload, content, length);
 566                 }
 567         }
 568 }
 569
 570
 571 /*
 572  * Entry point for WebCit transaction
 573  */
 574 void session_loop(struct httprequest *req)
 575 {
 576         char cmd[256];
 577         char action[256];
 578         char buf[256];
 579         int a, b;
 580         int ContentLength = 0;
 581         char ContentType[512];
 582         char *content;
 583         struct httprequest *hptr;
 584         char browser_host[256];
 585         char user_agent[256];
 586
 587         /* We stuff these with the values coming from the client cookies,
 588          * so we can use them to reconnect a timed out session if we have to.
 589          */
 590         char c_host[256];
 591         char c_port[256];
 592         char c_username[256];
 593         char c_password[256];
 594         char c_roomname[256];
 595         char cookie[256];
 596
 597         strcpy(c_host, defaulthost);
 598         strcpy(c_port, defaultport);
 599         strcpy(c_username, "");
 600         strcpy(c_password, "");
 601         strcpy(c_roomname, "");
 602
 603         WC->upload_length = 0;
 604         WC->upload = NULL;
 605
 606         hptr = req;
 607         if (hptr == NULL) return;
 608
 609         strcpy(cmd, hptr->line);
 610         hptr = hptr->next;
 611         extract_action(action, cmd);
 612
 613         while (hptr != NULL) {
 614                 strcpy(buf, hptr->line);
 615                 hptr = hptr->next;
 616
 617                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 618                         strcpy(cookie, &buf[15]);
 619                         cookie_to_stuff(cookie, NULL,
 620                                       c_username, c_password, c_roomname);
 621                 }
 622                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 623                         ContentLength = atoi(&buf[16]);
 624                 }
 625                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 626                         strcpy(ContentType, &buf[14]);
 627                 }
 628                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 629                         strcpy(user_agent, &buf[12]);
 630                 }
 631         }
 632
 633         if (ContentLength > 0) {
 634                 content = malloc(ContentLength + 1);
 635                 read(WC->http_sock, content, ContentLength);
 636
 637                 content[ContentLength] = 0;
 638
 639                 if (!strncasecmp(ContentType,
 640                               "application/x-www-form-urlencoded", 33)) {
 641                         addurls(content);
 642                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 643                         mime_parser(content, ContentLength, ContentType,
 644                                     *upload_handler);
 645                 }
 646         } else {
 647                 content = NULL;
 648         }
 649
 650         /* If there are variables in the URL, we must grab them now */
 651         for (a = 0; a < strlen(cmd); ++a)
 652                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 653                         for (b = a; b < strlen(cmd); ++b)
 654                                 if (isspace(cmd[b]))
 655                                         cmd[b] = 0;
 656                         addurls(&cmd[a + 1]);
 657                         cmd[a] = 0;
 658                 }
 659         /*
 660          * If we're not connected to a Citadel server, try to hook up the
 661          * connection now.  Preference is given to the host and port specified
 662          * by browser cookies, if cookies have been supplied.
 663          */
 664         if (!WC->connected) {
 665                 if (strlen(bstr("host")) > 0)
 666                         strcpy(c_host, bstr("host"));
 667                 if (strlen(bstr("port")) > 0)
 668                         strcpy(c_port, bstr("port"));
 669                 WC->serv_sock = connectsock(c_host, c_port, "tcp");
 670                 if (WC->serv_sock < 0) {
 671                         do_logout();
 672                 }
 673
 674                 WC->connected = 1;
 675                 serv_gets(buf); /* get the server welcome message */
 676                 locate_host(browser_host, WC->http_sock);
 677                 get_serv_info(browser_host, user_agent);
 678         }
 679         check_for_express_messages();
 680
 681         /*
 682          * If we're not logged in, but we have username and password cookies
 683          * supplied by the browser, try using them to log in.
 684          */
 685         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 686                 serv_printf("USER %s", c_username);
 687                 serv_gets(buf);
 688                 if (buf[0] == '3') {
 689                         serv_printf("PASS %s", c_password);
 690                         serv_gets(buf);
 691                         if (buf[0] == '2') {
 692                                 become_logged_in(c_username, c_password, buf);
 693                         }
 694                 }
 695         }
 696         /*
 697          * If we don't have a current room, but a cookie specifying the
 698          * current room is supplied, make an effort to go there.
 699          */
 700         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 701                 serv_printf("GOTO %s", c_roomname);
 702                 serv_gets(buf);
 703                 if (buf[0] == '2') {
 704                         strcpy(WC->wc_roomname, c_roomname);
 705                 }
 706         }
 707         if (!strcasecmp(action, "static")) {
 708                 strcpy(buf, &cmd[12]);
 709                 for (a = 0; a < strlen(buf); ++a)
 710                         if (isspace(buf[a]))
 711                                 buf[a] = 0;
 712                 output_static(buf);
 713         } else if (!strcasecmp(action, "image")) {
 714                 output_image();
 715         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
 716                 do_login();
 717         } else if (!WC->logged_in) {
 718                 display_login(NULL);
 719         }
 720         /* Various commands... */
 721
 722         else if (!strcasecmp(action, "do_welcome")) {
 723                 do_welcome();
 724         } else if (!strcasecmp(action, "display_main_menu")) {
 725                 display_main_menu();
 726         } else if (!strcasecmp(action, "advanced")) {
 727                 display_advanced_menu();
 728         } else if (!strcasecmp(action, "whobbs")) {
 729                 whobbs();
 730         } else if (!strcasecmp(action, "knrooms")) {
 731                 list_all_rooms_by_floor();
 732         } else if (!strcasecmp(action, "gotonext")) {
 733                 slrp_highest();
 734                 gotonext();
 735         } else if (!strcasecmp(action, "skip")) {
 736                 gotonext();
 737         } else if (!strcasecmp(action, "ungoto")) {
 738                 ungoto();
 739         } else if (!strcasecmp(action, "dotgoto")) {
 740                 slrp_highest();
 741                 smart_goto(bstr("room"));
 742         } else if (!strcasecmp(action, "termquit")) {
 743                 do_logout();
 744         } else if (!strcasecmp(action, "readnew")) {
 745                 readloop("readnew");
 746         } else if (!strcasecmp(action, "readold")) {
 747                 readloop("readold");
 748         } else if (!strcasecmp(action, "readfwd")) {
 749                 readloop("readfwd");
 750         } else if (!strcasecmp(action, "display_enter")) {
 751                 display_enter();
 752         } else if (!strcasecmp(action, "post")) {
 753                 post_message();
 754         } else if (!strcasecmp(action, "confirm_delete_msg")) {
 755                 confirm_delete_msg();
 756         } else if (!strcasecmp(action, "delete_msg")) {
 757                 delete_msg();
 758         } else if (!strcasecmp(action, "confirm_move_msg")) {
 759                 confirm_move_msg();
 760         } else if (!strcasecmp(action, "move_msg")) {
 761                 move_msg();
 762         } else if (!strcasecmp(action, "userlist")) {
 763                 userlist();
 764         } else if (!strcasecmp(action, "showuser")) {
 765                 showuser();
 766         } else if (!strcasecmp(action, "display_page")) {
 767                 display_page();
 768         } else if (!strcasecmp(action, "page_user")) {
 769                 page_user();
 770         } else if (!strcasecmp(action, "chat")) {
 771                 do_chat();
 772         } else if (!strcasecmp(action, "display_private")) {
 773                 display_private("", 0);
 774         } else if (!strcasecmp(action, "goto_private")) {
 775                 goto_private();
 776         } else if (!strcasecmp(action, "zapped_list")) {
 777                 zapped_list();
 778         } else if (!strcasecmp(action, "display_zap")) {
 779                 display_zap();
 780         } else if (!strcasecmp(action, "zap")) {
 781                 zap();
 782         } else if (!strcasecmp(action, "display_entroom")) {
 783                 display_entroom();
 784         } else if (!strcasecmp(action, "entroom")) {
 785                 entroom();
 786         } else if (!strcasecmp(action, "display_editroom")) {
 787                 display_editroom();
 788         } else if (!strcasecmp(action, "editroom")) {
 789                 editroom();
 790         } else if (!strcasecmp(action, "display_editinfo")) {
 791                 display_edit("Room info", "EINF 0", "RINF", "/editinfo");
 792         } else if (!strcasecmp(action, "editinfo")) {
 793                 save_edit("Room info", "EINF 1", 1);
 794         } else if (!strcasecmp(action, "display_editbio")) {
 795                 sprintf(buf, "RBIO %s", WC->wc_username);
 796                 display_edit("Your bio", "NOOP", buf, "editbio");
 797         } else if (!strcasecmp(action, "editbio")) {
 798                 save_edit("Your bio", "EBIO", 0);
 799         } else if (!strcasecmp(action, "confirm_delete_room")) {
 800                 confirm_delete_room();
 801         } else if (!strcasecmp(action, "delete_room")) {
 802                 delete_room();
 803         } else if (!strcasecmp(action, "validate")) {
 804                 validate();
 805         } else if (!strcasecmp(action, "display_editpic")) {
 806                 display_graphics_upload("your photo",
 807                                         "UIMG 0|_userpic_",
 808                                         "/editpic");
 809         } else if (!strcasecmp(action, "editpic")) {
 810                 do_graphics_upload("UIMG 1|_userpic_");
 811         } else if (!strcasecmp(action, "display_editroompic")) {
 812                 display_graphics_upload("the graphic for this room",
 813                                         "UIMG 0|_roompic_",
 814                                         "/editroompic");
 815         } else if (!strcasecmp(action, "editroompic")) {
 816                 do_graphics_upload("UIMG 1|_roompic_");
 817         } else if (!strcasecmp(action, "select_floor_to_edit_pic")) {
 818                 select_floor_to_edit_pic();
 819         } else if (!strcasecmp(action, "display_editfloorpic")) {
 820                 sprintf(buf, "UIMG 0|_floorpic_|%s",
 821                         bstr("which_floor"));
 822                 display_graphics_upload("the graphic for this floor",
 823                                         buf,
 824                                         "/editfloorpic");
 825         } else if (!strcasecmp(action, "editfloorpic")) {
 826                 sprintf(buf, "UIMG 1|_floorpic_|%s",
 827                         bstr("which_floor"));
 828                 do_graphics_upload(buf);
 829         } else if (!strcasecmp(action, "display_reg")) {
 830                 display_reg(0);
 831         } else if (!strcasecmp(action, "register")) {
 832                 register_user();
 833         } else if (!strcasecmp(action, "display_changepw")) {
 834                 display_changepw();
 835         } else if (!strcasecmp(action, "changepw")) {
 836                 changepw();
 837         } else if (!strcasecmp(action, "display_edit_node")) {
 838                 display_edit_node();
 839         } else if (!strcasecmp(action, "display_netconf")) {
 840                 display_netconf();
 841         } else if (!strcasecmp(action, "display_confirm_unshare")) {
 842                 display_confirm_unshare();
 843         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
 844                 display_confirm_delete_node();
 845         } else if (!strcasecmp(action, "delete_node")) {
 846                 delete_node();
 847         } else if (!strcasecmp(action, "unshare")) {
 848                 unshare();
 849         } else if (!strcasecmp(action, "display_add_node")) {
 850                 display_add_node();
 851         } else if (!strcasecmp(action, "add_node")) {
 852                 add_node();
 853         } else if (!strcasecmp(action, "display_share")) {
 854                 display_share();
 855         } else if (!strcasecmp(action, "share")) {
 856                 share();
 857         } else if (!strcasecmp(action, "terminate_session")) {
 858                 slrp_highest();
 859                 terminate_session();
 860         } else if (!strcasecmp(action, "edit_me")) {
 861                 edit_me();
 862         } else if (!strcasecmp(action, "display_siteconfig")) {
 863                 display_siteconfig();
 864         } else if (!strcasecmp(action, "siteconfig")) {
 865                 siteconfig();
 866         } else if (!strcasecmp(action, "display_generic")) {
 867                 display_generic();
 868         } else if (!strcasecmp(action, "do_generic")) {
 869                 do_generic();
 870         } else if (!strcasecmp(action, "display_menubar")) {
 871                 display_menubar(1);
 872         } else if (!strcasecmp(action, "diagnostics")) {
 873                 output_headers(1);
 874
 875                 wprintf("You're in session %d<HR>\n", WC->wc_session);
 876                 wprintf("Command: <BR><PRE>\n");
 877                 escputs(cmd);
 878                 wprintf("</PRE><HR>\n");
 879                 wprintf("Variables: <BR><PRE>\n");
 880                 dump_vars();
 881                 wprintf("</PRE><HR>\n");
 882                 wDumpContent(1);
 883         }
 884         /* When all else fais, display the main menu. */
 885         else {
 886                 display_main_menu();
 887         }
 888
 889         fflush(stdout);
 890         if (content != NULL) {
 891                 free(content);
 892                 content = NULL;
 893         }
 894         free_urls();
 895         if (WC->upload_length > 0) {
 896                 free(WC->upload);
 897                 WC->upload_length = 0;
 898         }
 899 }