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 int TransactionCount = 0;
  36 char *ExpressMessages = NULL;
  37
  38 /* This variable is set to 1 if the room banner and menubar have been
  39  * displayed, and we need to close the <TABLE> tags.
  40  */
  41 int fake_frames = 0;
  42
  43 struct urlcontent *urlstrings = NULL;
  44
  45 static const char *defaulthost = DEFAULT_HOST;
  46 static const char *defaultport = DEFAULT_PORT;
  47
  48
  49
  50 void unescape_input(char *buf)
  51 {
  52         int a, b;
  53         char hex[3];
  54
  55         while ((isspace(buf[strlen(buf) - 1])) && (strlen(buf) > 0))
  56                 buf[strlen(buf) - 1] = 0;
  57
  58         for (a = 0; a < strlen(buf); ++a) {
  59                 if (buf[a] == '+')
  60                         buf[a] = ' ';
  61                 if (buf[a] == '%') {
  62                         hex[0] = buf[a + 1];
  63                         hex[1] = buf[a + 2];
  64                         hex[2] = 0;
  65                         sscanf(hex, "%02x", &b);
  66                         buf[a] = (char) b;
  67                         strcpy(&buf[a + 1], &buf[a + 3]);
  68                 }
  69         }
  70
  71 }
  72
  73
  74 void addurls(char *url)
  75 {
  76         char *up, *ptr;
  77         char buf[256];
  78         int a, b;
  79         struct urlcontent *u;
  80
  81         up = url;
  82         while (strlen(up) > 0) {
  83
  84                 /* locate the = sign */
  85                 strncpy(buf, up, 255);
  86                 b = (-1);
  87                 for (a = 255; a >= 0; --a)
  88                         if (buf[a] == '=')
  89                                 b = a;
  90                 if (b < 0)
  91                         return;
  92                 buf[b] = 0;
  93
  94                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
  95                 u->next = urlstrings;
  96                 urlstrings = u;
  97                 strcpy(u->url_key, buf);
  98
  99                 /* now chop that part off */
 100                 for (a = 0; a <= b; ++a)
 101                         ++up;
 102
 103                 /* locate the & sign */
 104                 ptr = up;
 105                 b = strlen(up);
 106                 for (a = 0; a < strlen(up); ++a) {
 107                         if (!strncmp(ptr, "&", 1)) {
 108                                 b = a;
 109                                 break;
 110                         }
 111                         ++ptr;
 112                 }
 113                 ptr = up;
 114                 for (a = 0; a < b; ++a)
 115                         ++ptr;
 116                 strcpy(ptr, "");
 117
 118                 u->url_data = malloc(strlen(up) + 1);
 119                 strcpy(u->url_data, up);
 120                 u->url_data[b] = 0;
 121                 unescape_input(u->url_data);
 122                 up = ptr;
 123                 ++up;
 124         }
 125 }
 126
 127 void free_urls(void)
 128 {
 129         struct urlcontent *u;
 130
 131         while (urlstrings != NULL) {
 132                 free(urlstrings->url_data);
 133                 u = urlstrings->next;
 134                 free(urlstrings);
 135                 urlstrings = u;
 136         }
 137 }
 138
 139 /*
 140  * Diagnostic function to display the contents of all variables
 141  */
 142 void dump_vars(void)
 143 {
 144         struct urlcontent *u;
 145
 146         for (u = urlstrings; u != NULL; u = u->next) {
 147                 wprintf("%38s = %s\n", u->url_key, u->url_data);
 148         }
 149 }
 150
 151 char *bstr(char *key)
 152 {
 153         struct urlcontent *u;
 154
 155         for (u = urlstrings; u != NULL; u = u->next) {
 156                 if (!strcasecmp(u->url_key, key))
 157                         return (u->url_data);
 158         }
 159         return ("");
 160 }
 161
 162
 163 void wprintf(const char *format,...)
 164 {
 165         va_list arg_ptr;
 166         char wbuf[1024];
 167
 168         va_start(arg_ptr, format);
 169         vsprintf(wbuf, format, arg_ptr);
 170         va_end(arg_ptr);
 171
 172         write(WC->http_sock, wbuf, strlen(wbuf));
 173 }
 174
 175
 176 /*
 177  * wDumpContent() wraps up an HTTP session, closes tags, etc.
 178  *
 179  * print_standard_html_footer should be set to 0 to transmit only, 1 to
 180  * append the main menu and closing tags, or 2 to
 181  * append the closing tags only.
 182  */
 183 void wDumpContent(int print_standard_html_footer)
 184 {
 185         if (fake_frames) {
 186                 wprintf("<CENTER><FONT SIZE=-1>"
 187                         "<TABLE border=0 width=100%><TR>"
 188                         "<TD><A HREF=\"/ungoto\">"
 189                         "<IMG SRC=\"/static/back.gif\" BORDER=0>"
 190                         "Ungoto</A></TD>");
 191                 wprintf("<TD><A HREF=\"#TheTop\">"
 192                         "<IMG SRC=\"/static/up.gif\" BORDER=0>"
 193                         "Top of page</A></TD>");
 194                 wprintf("<TD><A HREF=\"/display_enter\">"
 195                         "<IMG SRC=\"/static/enter.gif\" BORDER=0>"
 196                         "Enter a message</A></TD>");
 197                 wprintf("<TD><A HREF=\"/gotonext\">"
 198                         "Goto next room"
 199                         "<IMG SRC=\"/static/forward.gif\" BORDER=0></A></TD>"
 200                         "</TR></TABLE>"
 201                         "</FONT>\n"
 202                         "</TD></TR></TABLE></TABLE>\n");
 203                 fake_frames = 0;
 204         }
 205
 206         if (print_standard_html_footer) {
 207                 if (print_standard_html_footer != 2) {
 208                         wprintf("<BR>");
 209                 }
 210                 wprintf("</BODY></HTML>\n");
 211         }
 212
 213
 214 }
 215
 216
 217 void escputs1(char *strbuf, int nbsp)
 218 {
 219         int a;
 220
 221         for (a = 0; a < strlen(strbuf); ++a) {
 222                 if (strbuf[a] == '<')
 223                         wprintf("&lt;");
 224                 else if (strbuf[a] == '>')
 225                         wprintf("&gt;");
 226                 else if (strbuf[a] == '&')
 227                         wprintf("&amp;");
 228                 else if (strbuf[a] == '\"')
 229                         wprintf("&quot;");
 230                 else if (strbuf[a] == '\'')
 231                         wprintf("&#39;");
 232                 else if (strbuf[a] == LB)
 233                         wprintf("<");
 234                 else if (strbuf[a] == RB)
 235                         wprintf(">");
 236                 else if (strbuf[a] == QU)
 237                         wprintf("\"");
 238                 else if ((strbuf[a] == 32) && (nbsp == 1)) {
 239                         wprintf("&nbsp;");
 240                 } else {
 241                         wprintf("%c", strbuf[a]);
 242                 }
 243         }
 244 }
 245
 246 void escputs(char *strbuf)
 247 {
 248         escputs1(strbuf, 0);
 249 }
 250
 251
 252
 253 char *urlesc(char *strbuf)
 254 {
 255         int a, b, c;
 256         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 257         static char outbuf[512];
 258
 259         strcpy(outbuf, "");
 260
 261         for (a = 0; a < strlen(strbuf); ++a) {
 262                 c = 0;
 263                 for (b = 0; b < strlen(ec); ++b) {
 264                         if (strbuf[a] == ec[b])
 265                                 c = 1;
 266                 }
 267                 b = strlen(outbuf);
 268                 if (c == 1)
 269                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 270                 else
 271                         sprintf(&outbuf[b], "%c", strbuf[a]);
 272         }
 273         return (outbuf);
 274 }
 275
 276 void urlescputs(char *strbuf)
 277 {
 278         wprintf("%s", urlesc(strbuf));
 279 }
 280
 281
 282
 283
 284 /*
 285  * Output all that important stuff that the browser will want to see
 286  *
 287  * print_standard_html_head values:
 288  * 0 = Nothing.  Do not display any leading HTTP or HTML.
 289  * 1 = HTTP headers plus the "fake frames" found in most windows.
 290  * 2 = HTTP headers required to terminate the session (unset cookies)
 291  * 3 = HTTP headers only.
 292  */
 293 void output_headers(int print_standard_html_head)
 294 {
 295
 296         static char *unset = "; expires=28-May-1971 18:10:00 GMT";
 297         char cookie[256];
 298
 299         wprintf("Content-type: text/html\n");
 300         wprintf("Server: %s\n", SERVER);
 301         wprintf("Connection: close\n");
 302
 303         if (print_standard_html_head > 0) {
 304                 wprintf("Pragma: no-cache\n");
 305                 wprintf("Cache-Control: no-store\n");
 306         }
 307         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 308                         WC->wc_password, WC->wc_roomname);
 309         if (print_standard_html_head == 2) {
 310                 wprintf("X-WebCit-Session: close\n");
 311                 wprintf("Set-cookie: webcit=%s\n", unset);
 312         } else {
 313                 wprintf("Set-cookie: webcit=%s\n", cookie);
 314         }
 315
 316         wprintf("\n");
 317
 318         if (print_standard_html_head > 0) {
 319                 wprintf("<HTML><HEAD><TITLE>");
 320                 escputs(serv_info.serv_humannode);
 321                 wprintf("</TITLE>\n"
 322                         "<META HTTP-EQUIV=\"Pragma\" CONTENT=\"no-cache\">\n"
 323                         "</HEAD>\n");
 324                 if (ExpressMessages != NULL) {
 325                         wprintf("<SCRIPT language=\"javascript\">\n");
 326                         wprintf("function ExpressMessage() {\n");
 327                         wprintf(" alert(\"");
 328                         escputs(ExpressMessages);
 329                         wprintf("\")\n");
 330                         wprintf(" }\n </SCRIPT>\n");
 331                 }
 332
 333
 334
 335                 /* JavaScript key-based navigation would go here if it
 336                  * were finished
 337                  */
 338
 339                 wprintf("<BODY ");
 340                 if (ExpressMessages != NULL) {
 341                         wprintf("onload=\"ExpressMessage()\" ");
 342                         free(ExpressMessages);
 343                         ExpressMessages = NULL;
 344                 }
 345                 wprintf("BACKGROUND=\"/image&name=background\" TEXT=\"#000000\" LINK=\"#004400\">\n");
 346
 347
 348         if (print_standard_html_head == 1) {
 349                 wprintf("<A NAME=\"TheTop\"></A>"
 350                         "<TABLE border=0 width=100%>"
 351                         "<TR VALIGN=TOP><TD>");
 352
 353                 display_menubar(0);
 354
 355                 wprintf("</TD><TD VALIGN=TOP>"
 356                         "<TABLE border=0 width=100%><TR VALIGN=TOP>"
 357                         "<TD>\n");
 358
 359                 embed_room_banner(NULL);
 360
 361                 wprintf("</TD></TR><TR VALIGN=TOP><TD>\n");
 362
 363                 fake_frames = 1;
 364                 }
 365         }
 366 }
 367
 368
 369
 370 void ExpressMessageCat(char *buf) {
 371         if (ExpressMessages == NULL) {
 372                 ExpressMessages = malloc(strlen(buf) + 4);
 373                 strcpy(ExpressMessages, "");
 374         } else {
 375                 ExpressMessages = realloc(ExpressMessages,
 376                         (strlen(ExpressMessages) + strlen(buf) + 4));
 377         }
 378         strcat(ExpressMessages, buf);
 379         strcat(ExpressMessages, "\\n");
 380 }
 381
 382
 383 void check_for_express_messages()
 384 {
 385         char buf[256];
 386
 387         serv_puts("PEXP");
 388         serv_gets(buf);
 389         if (buf[0] == '1') {
 390                 while (serv_gets(buf), strcmp(buf, "000")) {
 391                         ExpressMessageCat(buf);
 392                 }
 393         }
 394 }
 395
 396
 397
 398
 399 void output_static(char *what)
 400 {
 401         char buf[256];
 402         FILE *fp;
 403         struct stat statbuf;
 404         off_t bytes;
 405
 406         sprintf(buf, "static/%s", what);
 407         fp = fopen(buf, "rb");
 408         if (fp == NULL) {
 409                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 410                 wprintf("Content-Type: text/plain\n");
 411                 wprintf("\n");
 412                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 413         } else {
 414                 wprintf("HTTP/1.0 200 OK\n");
 415                 output_headers(0);
 416
 417                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 418                         wprintf("Content-type: image/gif\n");
 419                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 420                         wprintf("Content-type: text/plain\n");
 421                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 422                         wprintf("Content-type: image/jpeg\n");
 423                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 424                         wprintf("Content-type: text/html\n");
 425                 else
 426                         wprintf("Content-type: application/octet-stream\n");
 427
 428                 fstat(fileno(fp), &statbuf);
 429                 bytes = statbuf.st_size;
 430                 wprintf("Content-length: %ld\n", (long) bytes);
 431                 printf("\n");
 432                 while (bytes--) {
 433                         wprintf("%c", getc(fp) );
 434                 }
 435                 fclose(fp);
 436         }
 437 }
 438
 439 void output_image()
 440 {
 441         char buf[256];
 442         char xferbuf[4096];
 443         off_t bytes;
 444         off_t thisblock;
 445         off_t accomplished = 0L;
 446
 447
 448         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 449         serv_gets(buf);
 450         if (buf[0] == '2') {
 451                 bytes = extract_long(&buf[4], 0);
 452                 wprintf("HTTP/1.0 200 OK\n");
 453                 output_headers(0);
 454                 wprintf("Content-type: image/gif\n");
 455                 wprintf("Content-length: %ld\n", (long) bytes);
 456                 wprintf("\n");
 457
 458                 while (bytes > (off_t) 0) {
 459                         thisblock = (off_t) sizeof(xferbuf);
 460                         if (thisblock > bytes)
 461                                 thisblock = bytes;
 462                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 463                         serv_gets(buf);
 464                         if (buf[0] == '6')
 465                                 thisblock = extract_long(&buf[4], 0);
 466                         serv_read(xferbuf, (int) thisblock);
 467                         write(WC->http_sock, xferbuf, thisblock);
 468                         bytes = bytes - thisblock;
 469                         accomplished = accomplished + thisblock;
 470                 }
 471                 fflush(stdout);
 472                 serv_puts("CLOS");
 473                 serv_gets(buf);
 474         } else {
 475                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 476                 output_headers(0);
 477                 wprintf("Content-Type: text/plain\n");
 478                 wprintf("\n");
 479                 wprintf("Error retrieving image\n");
 480         }
 481
 482 }
 483
 484
 485 /*
 486  * Convenience functions to display a page containing only a string
 487  */
 488 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 489 {
 490         wprintf("HTTP/1.0 200 OK\n");
 491         output_headers(1);
 492         wprintf("<TABLE WIDTH=100% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
 493         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 494         wprintf("<B>%s</B>\n", titlebarmsg);
 495         wprintf("</FONT></TD></TR></TABLE><BR>\n");
 496         escputs(messagetext);
 497
 498         wprintf("<HR>\n");
 499         embed_main_menu();
 500         wDumpContent(1);
 501 }
 502
 503 void display_error(char *errormessage)
 504 {
 505         convenience_page("770000", "Error", errormessage);
 506 }
 507
 508 void display_success(char *successmessage)
 509 {
 510         convenience_page("007700", "OK", successmessage);
 511 }
 512
 513
 514
 515 void extract_action(char *actbuf, char *cmdbuf)
 516 {
 517         int i;
 518
 519         strcpy(actbuf, cmdbuf);
 520         if (!strncasecmp(actbuf, "GET /", 5))
 521                 strcpy(actbuf, &actbuf[5]);
 522         if (!strncasecmp(actbuf, "PUT /", 5))
 523                 strcpy(actbuf, &actbuf[5]);
 524         if (!strncasecmp(actbuf, "POST /", 6))
 525                 strcpy(actbuf, &actbuf[6]);
 526
 527         for (i = 0; i < strlen(actbuf); ++i) {
 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                 if (actbuf[i] == '?') {
 537                         actbuf[i] = 0;
 538                         i = 0;
 539                 }
 540                 if (actbuf[i] == '&') {
 541                         actbuf[i] = 0;
 542                         i = 0;
 543                 }
 544         }
 545 }
 546
 547
 548 void upload_handler(char *name, char *filename, char *encoding,
 549                     void *content, char *cbtype, size_t length)
 550 {
 551
 552         fprintf(stderr, "UPLOAD HANDLER CALLED\n");
 553         fprintf(stderr, "    name = %s\n", name);
 554         fprintf(stderr, "filename = %s\n", filename);
 555         fprintf(stderr, "encoding = %s\n", encoding);
 556         fprintf(stderr, "    type = %s\n", cbtype);
 557         fprintf(stderr, "  length = %d\n", length);
 558
 559         if (strlen(name) > 0) {
 560                 WC->upload = malloc(length);
 561                 if (WC->upload != NULL) {
 562                         WC->upload_length = length;
 563                         memcpy(WC->upload, content, length);
 564                 }
 565         }
 566 }
 567
 568
 569 /*
 570  * Entry point for WebCit transaction
 571  */
 572 void session_loop(struct httprequest *req)
 573 {
 574         char cmd[256];
 575         char action[256];
 576         char buf[256];
 577         int a, b;
 578         int ContentLength = 0;
 579         char ContentType[512];
 580         char *content;
 581         struct httprequest *hptr;
 582         char browser_host[256];
 583         char user_agent[256];
 584
 585         /* We stuff these with the values coming from the client cookies,
 586          * so we can use them to reconnect a timed out session if we have to.
 587          */
 588         char c_host[256];
 589         char c_port[256];
 590         char c_username[256];
 591         char c_password[256];
 592         char c_roomname[256];
 593         char cookie[256];
 594
 595         strcpy(c_host, defaulthost);
 596         strcpy(c_port, defaultport);
 597         strcpy(c_username, "");
 598         strcpy(c_password, "");
 599         strcpy(c_roomname, "");
 600
 601         WC->upload_length = 0;
 602         WC->upload = NULL;
 603
 604         hptr = req;
 605         if (hptr == NULL) return;
 606
 607         strcpy(cmd, hptr->line);
 608         hptr = hptr->next;
 609         extract_action(action, cmd);
 610
 611         while (hptr != NULL) {
 612                 strcpy(buf, hptr->line);
 613                 hptr = hptr->next;
 614
 615                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 616                         strcpy(cookie, &buf[15]);
 617                         cookie_to_stuff(cookie, NULL,
 618                                       c_username, c_password, c_roomname);
 619                 }
 620                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 621                         ContentLength = atoi(&buf[16]);
 622                 }
 623                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 624                         strcpy(ContentType, &buf[14]);
 625                 }
 626                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 627                         strcpy(user_agent, &buf[12]);
 628                 }
 629         }
 630
 631         ++TransactionCount;
 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                 wprintf("HTTP/1.0 200 OK\n");
 874                 output_headers(1);
 875
 876                 wprintf("TransactionCount is %d<BR>\n", TransactionCount);
 877                 wprintf("You're in session %d<HR>\n", WC->wc_session);
 878                 wprintf("Command: <BR><PRE>\n");
 879                 escputs(cmd);
 880                 wprintf("</PRE><HR>\n");
 881                 wprintf("Variables: <BR><PRE>\n");
 882                 dump_vars();
 883                 wprintf("</PRE><HR>\n");
 884                 wDumpContent(1);
 885         }
 886         /* When all else fais, display the main menu. */
 887         else {
 888                 display_main_menu();
 889         }
 890
 891         fflush(stdout);
 892         if (content != NULL) {
 893                 free(content);
 894                 content = NULL;
 895         }
 896         free_urls();
 897         if (WC->upload_length > 0) {
 898                 free(WC->upload);
 899                 WC->upload_length = 0;
 900         }
 901 }