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