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;
  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;
  41
  42 struct urlcontent *urlstrings = NULL;
  43
  44 static const char *defaulthost = DEFAULT_HOST;
  45 static const char *defaultport = DEFAULT_PORT;
  46
  47
  48
  49 void unescape_input(char *buf)
  50 {
  51         int a, b;
  52         char hex[3];
  53
  54         while ((isspace(buf[strlen(buf) - 1])) && (strlen(buf) > 0))
  55                 buf[strlen(buf) - 1] = 0;
  56
  57         for (a = 0; a < strlen(buf); ++a) {
  58                 if (buf[a] == '+')
  59                         buf[a] = ' ';
  60                 if (buf[a] == '%') {
  61                         hex[0] = buf[a + 1];
  62                         hex[1] = buf[a + 2];
  63                         hex[2] = 0;
  64                         sscanf(hex, "%02x", &b);
  65                         buf[a] = (char) b;
  66                         strcpy(&buf[a + 1], &buf[a + 3]);
  67                 }
  68         }
  69
  70 }
  71
  72
  73 void addurls(char *url)
  74 {
  75         char *up, *ptr;
  76         char buf[256];
  77         int a, b;
  78         struct urlcontent *u;
  79
  80         up = url;
  81         while (strlen(up) > 0) {
  82
  83                 /* locate the = sign */
  84                 strncpy(buf, up, 255);
  85                 b = (-1);
  86                 for (a = 255; a >= 0; --a)
  87                         if (buf[a] == '=')
  88                                 b = a;
  89                 if (b < 0)
  90                         return;
  91                 buf[b] = 0;
  92
  93                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
  94                 u->next = urlstrings;
  95                 urlstrings = u;
  96                 strcpy(u->url_key, buf);
  97
  98                 /* now chop that part off */
  99                 for (a = 0; a <= b; ++a)
 100                         ++up;
 101
 102                 /* locate the & sign */
 103                 ptr = up;
 104                 b = strlen(up);
 105                 for (a = 0; a < strlen(up); ++a) {
 106                         if (!strncmp(ptr, "&", 1)) {
 107                                 b = a;
 108                                 break;
 109                         }
 110                         ++ptr;
 111                 }
 112                 ptr = up;
 113                 for (a = 0; a < b; ++a)
 114                         ++ptr;
 115                 strcpy(ptr, "");
 116
 117                 u->url_data = malloc(strlen(up) + 1);
 118                 strcpy(u->url_data, up);
 119                 u->url_data[b] = 0;
 120                 unescape_input(u->url_data);
 121                 up = ptr;
 122                 ++up;
 123         }
 124 }
 125
 126 void free_urls(void)
 127 {
 128         struct urlcontent *u;
 129
 130         while (urlstrings != NULL) {
 131                 free(urlstrings->url_data);
 132                 u = urlstrings->next;
 133                 free(urlstrings);
 134                 urlstrings = u;
 135         }
 136 }
 137
 138 /*
 139  * Diagnostic function to display the contents of all variables
 140  */
 141 void dump_vars(void)
 142 {
 143         struct urlcontent *u;
 144
 145         for (u = urlstrings; u != NULL; u = u->next) {
 146                 wprintf("%38s = %s\n", u->url_key, u->url_data);
 147         }
 148 }
 149
 150 char *bstr(char *key)
 151 {
 152         struct urlcontent *u;
 153
 154         for (u = urlstrings; u != NULL; u = u->next) {
 155                 if (!strcasecmp(u->url_key, key))
 156                         return (u->url_data);
 157         }
 158         return ("");
 159 }
 160
 161
 162 void wprintf(const char *format,...)
 163 {
 164         va_list arg_ptr;
 165         char wbuf[1024];
 166
 167         va_start(arg_ptr, format);
 168         vsprintf(wbuf, format, arg_ptr);
 169         va_end(arg_ptr);
 170
 171         write(WC->http_sock, wbuf, strlen(wbuf));
 172 }
 173
 174
 175 /*
 176  * wDumpContent() wraps up an HTTP session, closes tags, etc.
 177  *
 178  * print_standard_html_footer should be set to 0 to transmit only, 1 to
 179  * append the main menu and closing tags, or 2 to
 180  * append the closing tags only.
 181  */
 182 void wDumpContent(int print_standard_html_footer)
 183 {
 184         if (fake_frames) {
 185                 wprintf("<CENTER><FONT SIZE=-1>"
 186                         "<TABLE border=0 width=100%><TR>"
 187                         "<TD><A HREF=\"/ungoto\">"
 188                         "<IMG SRC=\"/static/back.gif\" BORDER=0>"
 189                         "Ungoto</A></TD>");
 190                 wprintf("<TD><A HREF=\"#TheTop\">"
 191                         "<IMG SRC=\"/static/up.gif\" BORDER=0>"
 192                         "Top of page</A></TD>");
 193                 wprintf("<TD><A HREF=\"/display_enter\">"
 194                         "<IMG SRC=\"/static/enter.gif\" BORDER=0>"
 195                         "Enter a message</A></TD>");
 196                 wprintf("<TD><A HREF=\"/gotonext\">"
 197                         "Goto next room"
 198                         "<IMG SRC=\"/static/forward.gif\" BORDER=0></A></TD>"
 199                         "</TR></TABLE>"
 200                         "</FONT>\n"
 201                         "</TD></TR></TABLE></TABLE>\n");
 202                 fake_frames = 0;
 203         }
 204
 205         if (print_standard_html_footer) {
 206                 if (print_standard_html_footer != 2) {
 207                         wprintf("<BR>");
 208                 }
 209                 wprintf("</BODY></HTML>\n");
 210         }
 211
 212
 213 }
 214
 215
 216 void escputs1(char *strbuf, int nbsp)
 217 {
 218         int a;
 219
 220         for (a = 0; a < strlen(strbuf); ++a) {
 221                 if (strbuf[a] == '<')
 222                         wprintf("&lt;");
 223                 else if (strbuf[a] == '>')
 224                         wprintf("&gt;");
 225                 else if (strbuf[a] == '&')
 226                         wprintf("&amp;");
 227                 else if (strbuf[a] == '\"')
 228                         wprintf("&quot;");
 229                 else if (strbuf[a] == '\'')
 230                         wprintf("&#39;");
 231                 else if (strbuf[a] == LB)
 232                         wprintf("<");
 233                 else if (strbuf[a] == RB)
 234                         wprintf(">");
 235                 else if (strbuf[a] == QU)
 236                         wprintf("\"");
 237                 else if ((strbuf[a] == 32) && (nbsp == 1)) {
 238                         wprintf("&nbsp;");
 239                 } else {
 240                         wprintf("%c", strbuf[a]);
 241                 }
 242         }
 243 }
 244
 245 void escputs(char *strbuf)
 246 {
 247         escputs1(strbuf, 0);
 248 }
 249
 250
 251
 252 char *urlesc(char *strbuf)
 253 {
 254         int a, b, c;
 255         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 256         static char outbuf[512];
 257
 258         strcpy(outbuf, "");
 259
 260         for (a = 0; a < strlen(strbuf); ++a) {
 261                 c = 0;
 262                 for (b = 0; b < strlen(ec); ++b) {
 263                         if (strbuf[a] == ec[b])
 264                                 c = 1;
 265                 }
 266                 b = strlen(outbuf);
 267                 if (c == 1)
 268                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 269                 else
 270                         sprintf(&outbuf[b], "%c", strbuf[a]);
 271         }
 272         return (outbuf);
 273 }
 274
 275 void urlescputs(char *strbuf)
 276 {
 277         wprintf("%s", urlesc(strbuf));
 278 }
 279
 280
 281
 282
 283 /*
 284  * Output all that important stuff that the browser will want to see
 285  *
 286  * print_standard_html_head values:
 287  * 0 = Nothing.  Do not display any leading HTTP or HTML.
 288  * 1 = HTTP headers plus the "fake frames" found in most windows.
 289  * 2 = HTTP headers required to terminate the session (unset cookies)
 290  * 3 = HTTP headers only.
 291  */
 292 void output_headers(int print_standard_html_head)
 293 {
 294
 295         static char *unset = "; expires=28-May-1971 18:10:00 GMT";
 296         char cookie[256];
 297
 298         if (print_standard_html_head > 0) {
 299                 wprintf("Content-type: text/html\n");
 300                 wprintf("Server: %s\n", SERVER);
 301                 wprintf("Connection: close\n");
 302                 wprintf("Pragma: no-cache\n");
 303                 wprintf("Cache-Control: no-store\n");
 304         }
 305         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 306                         WC->wc_password, WC->wc_roomname);
 307         if (print_standard_html_head == 2) {
 308                 wprintf("X-WebCit-Session: close\n");
 309                 wprintf("Set-cookie: webcit=%s\n", unset);
 310         } else {
 311                 wprintf("Set-cookie: webcit=%s\n", cookie);
 312         }
 313
 314         if (print_standard_html_head > 0) {
 315                 wprintf("\n");
 316                 wprintf("<HTML><HEAD><TITLE>");
 317                 escputs(serv_info.serv_humannode);
 318                 wprintf("</TITLE>\n"
 319                         "<META HTTP-EQUIV=\"Pragma\" CONTENT=\"no-cache\">\n"
 320                         "</HEAD>\n");
 321                 if (ExpressMessages != NULL) {
 322                         wprintf("<SCRIPT language=\"javascript\">\n");
 323                         wprintf("function ExpressMessage() {\n");
 324                         wprintf(" alert(\"");
 325                         escputs(ExpressMessages);
 326                         wprintf("\")\n");
 327                         wprintf(" }\n </SCRIPT>\n");
 328                 }
 329
 330
 331
 332                 /* JavaScript key-based navigation would go here if it
 333                  * were finished
 334                  */
 335
 336                 wprintf("<BODY ");
 337                 if (ExpressMessages != NULL) {
 338                         wprintf("onload=\"ExpressMessage()\" ");
 339                         free(ExpressMessages);
 340                         ExpressMessages = NULL;
 341                 }
 342                 wprintf("BACKGROUND=\"/image&name=background\" TEXT=\"#000000\" LINK=\"#004400\">\n");
 343
 344
 345         if (print_standard_html_head == 1) {
 346                 wprintf("<A NAME=\"TheTop\"></A>"
 347                         "<TABLE border=0 width=100%>"
 348                         "<TR VALIGN=TOP><TD>");
 349
 350                 display_menubar(0);
 351
 352                 wprintf("</TD><TD VALIGN=TOP>"
 353                         "<TABLE border=0 width=100%><TR VALIGN=TOP>"
 354                         "<TD>\n");
 355
 356                 embed_room_banner(NULL);
 357
 358                 wprintf("</TD></TR><TR VALIGN=TOP><TD>\n");
 359
 360                 fake_frames = 1;
 361                 }
 362         }
 363 }
 364
 365
 366
 367 void ExpressMessageCat(char *buf) {
 368         if (ExpressMessages == NULL) {
 369                 ExpressMessages = malloc(strlen(buf) + 4);
 370                 strcpy(ExpressMessages, "");
 371         } else {
 372                 ExpressMessages = realloc(ExpressMessages,
 373                         (strlen(ExpressMessages) + strlen(buf) + 4));
 374         }
 375         strcat(ExpressMessages, buf);
 376         strcat(ExpressMessages, "\\n");
 377 }
 378
 379
 380 void check_for_express_messages()
 381 {
 382         char buf[256];
 383
 384         serv_puts("PEXP");
 385         serv_gets(buf);
 386         if (buf[0] == '1') {
 387                 while (serv_gets(buf), strcmp(buf, "000")) {
 388                         ExpressMessageCat(buf);
 389                 }
 390         }
 391 }
 392
 393
 394
 395
 396 void output_static(char *what)
 397 {
 398         char buf[4096];
 399         long thisblock;
 400         FILE *fp;
 401         struct stat statbuf;
 402         off_t bytes;
 403
 404         sprintf(buf, "static/%s", what);
 405         fp = fopen(buf, "rb");
 406         if (fp == NULL) {
 407                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 408                 wprintf("Content-Type: text/plain\n");
 409                 wprintf("\n");
 410                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 411         } else {
 412                 wprintf("HTTP/1.0 200 OK\n");
 413                 output_headers(0);
 414
 415                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 416                         wprintf("Content-type: image/gif\n");
 417                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 418                         wprintf("Content-type: text/plain\n");
 419                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 420                         wprintf("Content-type: image/jpeg\n");
 421                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 422                         wprintf("Content-type: text/html\n");
 423                 else
 424                         wprintf("Content-type: application/octet-stream\n");
 425
 426                 fstat(fileno(fp), &statbuf);
 427                 bytes = statbuf.st_size;
 428                 fprintf(stderr, "Static: %s, %ld bytes\n", what, bytes);
 429                 wprintf("Content-length: %ld\n", (long) bytes);
 430                 wprintf("\n");
 431                 while (bytes > 0) {
 432                         thisblock = sizeof(buf);
 433                         if (thisblock > bytes) thisblock = bytes;
 434                         fread(buf, thisblock, 1, fp);
 435                         write(WC->http_sock, buf, thisblock);
 436                         bytes = bytes - thisblock;
 437                 }
 438                 fclose(fp);
 439         }
 440 }
 441
 442 /*
 443  * When the browser requests an image file from the Citadel server,
 444  * this function is called to transmit it.
 445  */
 446 void output_image()
 447 {
 448         char buf[256];
 449         char xferbuf[4096];
 450         off_t bytes;
 451         off_t thisblock;
 452         off_t accomplished = 0L;
 453
 454
 455         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 456         serv_gets(buf);
 457         if (buf[0] == '2') {
 458                 bytes = extract_long(&buf[4], 0);
 459                 wprintf("HTTP/1.0 200 OK\n");
 460                 output_headers(0);
 461                 wprintf("Content-type: image/gif\n");
 462                 wprintf("Content-length: %ld\n", (long) bytes);
 463                 wprintf("\n");
 464
 465                 while (bytes > (off_t) 0) {
 466                         thisblock = (off_t) sizeof(xferbuf);
 467                         if (thisblock > bytes)
 468                                 thisblock = bytes;
 469                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 470                         serv_gets(buf);
 471                         if (buf[0] == '6')
 472                                 thisblock = extract_long(&buf[4], 0);
 473                         serv_read(xferbuf, (int) thisblock);
 474                         write(WC->http_sock, xferbuf, thisblock);
 475                         bytes = bytes - thisblock;
 476                         accomplished = accomplished + thisblock;
 477                 }
 478                 serv_puts("CLOS");
 479                 serv_gets(buf);
 480         } else {
 481                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 482                 output_headers(0);
 483                 wprintf("Content-Type: text/plain\n");
 484                 wprintf("\n");
 485                 wprintf("Error retrieving image\n");
 486         }
 487
 488 }
 489
 490
 491 /*
 492  * Convenience functions to display a page containing only a string
 493  */
 494 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 495 {
 496         wprintf("HTTP/1.0 200 OK\n");
 497         output_headers(1);
 498         wprintf("<TABLE WIDTH=100% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
 499         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 500         wprintf("<B>%s</B>\n", titlebarmsg);
 501         wprintf("</FONT></TD></TR></TABLE><BR>\n");
 502         escputs(messagetext);
 503
 504         wprintf("<HR>\n");
 505         embed_main_menu();
 506         wDumpContent(1);
 507 }
 508
 509 void display_error(char *errormessage)
 510 {
 511         convenience_page("770000", "Error", errormessage);
 512 }
 513
 514 void display_success(char *successmessage)
 515 {
 516         convenience_page("007700", "OK", successmessage);
 517 }
 518
 519
 520
 521 void extract_action(char *actbuf, char *cmdbuf)
 522 {
 523         int i;
 524
 525         strcpy(actbuf, cmdbuf);
 526         if (!strncasecmp(actbuf, "GET /", 5))
 527                 strcpy(actbuf, &actbuf[5]);
 528         if (!strncasecmp(actbuf, "PUT /", 5))
 529                 strcpy(actbuf, &actbuf[5]);
 530         if (!strncasecmp(actbuf, "POST /", 6))
 531                 strcpy(actbuf, &actbuf[6]);
 532
 533         for (i = 0; i < strlen(actbuf); ++i) {
 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                 if (actbuf[i] == '&') {
 547                         actbuf[i] = 0;
 548                         i = 0;
 549                 }
 550         }
 551 }
 552
 553
 554 void upload_handler(char *name, char *filename, char *encoding,
 555                     void *content, char *cbtype, size_t length)
 556 {
 557
 558         fprintf(stderr, "UPLOAD HANDLER CALLED\n");
 559         fprintf(stderr, "    name = %s\n", name);
 560         fprintf(stderr, "filename = %s\n", filename);
 561         fprintf(stderr, "encoding = %s\n", encoding);
 562         fprintf(stderr, "    type = %s\n", cbtype);
 563         fprintf(stderr, "  length = %d\n", length);
 564
 565         if (strlen(name) > 0) {
 566                 WC->upload = malloc(length);
 567                 if (WC->upload != NULL) {
 568                         WC->upload_length = length;
 569                         memcpy(WC->upload, content, length);
 570                 }
 571         }
 572 }
 573
 574
 575 /*
 576  * Entry point for WebCit transaction
 577  */
 578 void session_loop(struct httprequest *req)
 579 {
 580         char cmd[256];
 581         char action[256];
 582         char buf[256];
 583         int a, b;
 584         int ContentLength = 0;
 585         char ContentType[512];
 586         char *content;
 587         struct httprequest *hptr;
 588         char browser_host[256];
 589         char user_agent[256];
 590
 591         /* We stuff these with the values coming from the client cookies,
 592          * so we can use them to reconnect a timed out session if we have to.
 593          */
 594         char c_host[256];
 595         char c_port[256];
 596         char c_username[256];
 597         char c_password[256];
 598         char c_roomname[256];
 599         char cookie[256];
 600
 601         strcpy(c_host, defaulthost);
 602         strcpy(c_port, defaultport);
 603         strcpy(c_username, "");
 604         strcpy(c_password, "");
 605         strcpy(c_roomname, "");
 606
 607         WC->upload_length = 0;
 608         WC->upload = NULL;
 609
 610         hptr = req;
 611         if (hptr == NULL) return;
 612
 613         strcpy(cmd, hptr->line);
 614         hptr = hptr->next;
 615         extract_action(action, cmd);
 616
 617         while (hptr != NULL) {
 618                 strcpy(buf, hptr->line);
 619                 hptr = hptr->next;
 620
 621                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 622                         strcpy(cookie, &buf[15]);
 623                         cookie_to_stuff(cookie, NULL,
 624                                       c_username, c_password, c_roomname);
 625                 }
 626                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 627                         ContentLength = atoi(&buf[16]);
 628                 }
 629                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 630                         strcpy(ContentType, &buf[14]);
 631                 }
 632                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 633                         strcpy(user_agent, &buf[12]);
 634                 }
 635         }
 636
 637         if (ContentLength > 0) {
 638                 content = malloc(ContentLength + 1);
 639                 read(WC->http_sock, content, ContentLength);
 640
 641                 content[ContentLength] = 0;
 642
 643                 if (!strncasecmp(ContentType,
 644                               "application/x-www-form-urlencoded", 33)) {
 645                         addurls(content);
 646                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 647                         mime_parser(content, ContentLength, ContentType,
 648                                     *upload_handler);
 649                 }
 650         } else {
 651                 content = NULL;
 652         }
 653
 654         /* If there are variables in the URL, we must grab them now */
 655         for (a = 0; a < strlen(cmd); ++a)
 656                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 657                         for (b = a; b < strlen(cmd); ++b)
 658                                 if (isspace(cmd[b]))
 659                                         cmd[b] = 0;
 660                         addurls(&cmd[a + 1]);
 661                         cmd[a] = 0;
 662                 }
 663         /*
 664          * If we're not connected to a Citadel server, try to hook up the
 665          * connection now.  Preference is given to the host and port specified
 666          * by browser cookies, if cookies have been supplied.
 667          */
 668         if (!WC->connected) {
 669                 if (strlen(bstr("host")) > 0)
 670                         strcpy(c_host, bstr("host"));
 671                 if (strlen(bstr("port")) > 0)
 672                         strcpy(c_port, bstr("port"));
 673                 WC->serv_sock = connectsock(c_host, c_port, "tcp");
 674                 if (WC->serv_sock < 0) {
 675                         do_logout();
 676                 }
 677
 678                 WC->connected = 1;
 679                 serv_gets(buf); /* get the server welcome message */
 680                 locate_host(browser_host, WC->http_sock);
 681                 get_serv_info(browser_host, user_agent);
 682         }
 683         check_for_express_messages();
 684
 685         /*
 686          * If we're not logged in, but we have username and password cookies
 687          * supplied by the browser, try using them to log in.
 688          */
 689         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 690                 serv_printf("USER %s", c_username);
 691                 serv_gets(buf);
 692                 if (buf[0] == '3') {
 693                         serv_printf("PASS %s", c_password);
 694                         serv_gets(buf);
 695                         if (buf[0] == '2') {
 696                                 become_logged_in(c_username, c_password, buf);
 697                         }
 698                 }
 699         }
 700         /*
 701          * If we don't have a current room, but a cookie specifying the
 702          * current room is supplied, make an effort to go there.
 703          */
 704         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 705                 serv_printf("GOTO %s", c_roomname);
 706                 serv_gets(buf);
 707                 if (buf[0] == '2') {
 708                         strcpy(WC->wc_roomname, c_roomname);
 709                 }
 710         }
 711         if (!strcasecmp(action, "static")) {
 712                 strcpy(buf, &cmd[12]);
 713                 for (a = 0; a < strlen(buf); ++a)
 714                         if (isspace(buf[a]))
 715                                 buf[a] = 0;
 716                 output_static(buf);
 717         } else if (!strcasecmp(action, "image")) {
 718                 output_image();
 719         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
 720                 do_login();
 721         } else if (!WC->logged_in) {
 722                 display_login(NULL);
 723         }
 724         /* Various commands... */
 725
 726         else if (!strcasecmp(action, "do_welcome")) {
 727                 do_welcome();
 728         } else if (!strcasecmp(action, "display_main_menu")) {
 729                 display_main_menu();
 730         } else if (!strcasecmp(action, "advanced")) {
 731                 display_advanced_menu();
 732         } else if (!strcasecmp(action, "whobbs")) {
 733                 whobbs();
 734         } else if (!strcasecmp(action, "knrooms")) {
 735                 list_all_rooms_by_floor();
 736         } else if (!strcasecmp(action, "gotonext")) {
 737                 slrp_highest();
 738                 gotonext();
 739         } else if (!strcasecmp(action, "skip")) {
 740                 gotonext();
 741         } else if (!strcasecmp(action, "ungoto")) {
 742                 ungoto();
 743         } else if (!strcasecmp(action, "dotgoto")) {
 744                 slrp_highest();
 745                 smart_goto(bstr("room"));
 746         } else if (!strcasecmp(action, "termquit")) {
 747                 do_logout();
 748         } else if (!strcasecmp(action, "readnew")) {
 749                 readloop("readnew");
 750         } else if (!strcasecmp(action, "readold")) {
 751                 readloop("readold");
 752         } else if (!strcasecmp(action, "readfwd")) {
 753                 readloop("readfwd");
 754         } else if (!strcasecmp(action, "display_enter")) {
 755                 display_enter();
 756         } else if (!strcasecmp(action, "post")) {
 757                 post_message();
 758         } else if (!strcasecmp(action, "confirm_delete_msg")) {
 759                 confirm_delete_msg();
 760         } else if (!strcasecmp(action, "delete_msg")) {
 761                 delete_msg();
 762         } else if (!strcasecmp(action, "confirm_move_msg")) {
 763                 confirm_move_msg();
 764         } else if (!strcasecmp(action, "move_msg")) {
 765                 move_msg();
 766         } else if (!strcasecmp(action, "userlist")) {
 767                 userlist();
 768         } else if (!strcasecmp(action, "showuser")) {
 769                 showuser();
 770         } else if (!strcasecmp(action, "display_page")) {
 771                 display_page();
 772         } else if (!strcasecmp(action, "page_user")) {
 773                 page_user();
 774         } else if (!strcasecmp(action, "chat")) {
 775                 do_chat();
 776         } else if (!strcasecmp(action, "display_private")) {
 777                 display_private("", 0);
 778         } else if (!strcasecmp(action, "goto_private")) {
 779                 goto_private();
 780         } else if (!strcasecmp(action, "zapped_list")) {
 781                 zapped_list();
 782         } else if (!strcasecmp(action, "display_zap")) {
 783                 display_zap();
 784         } else if (!strcasecmp(action, "zap")) {
 785                 zap();
 786         } else if (!strcasecmp(action, "display_entroom")) {
 787                 display_entroom();
 788         } else if (!strcasecmp(action, "entroom")) {
 789                 entroom();
 790         } else if (!strcasecmp(action, "display_editroom")) {
 791                 display_editroom();
 792         } else if (!strcasecmp(action, "editroom")) {
 793                 editroom();
 794         } else if (!strcasecmp(action, "display_editinfo")) {
 795                 display_edit("Room info", "EINF 0", "RINF", "/editinfo");
 796         } else if (!strcasecmp(action, "editinfo")) {
 797                 save_edit("Room info", "EINF 1", 1);
 798         } else if (!strcasecmp(action, "display_editbio")) {
 799                 sprintf(buf, "RBIO %s", WC->wc_username);
 800                 display_edit("Your bio", "NOOP", buf, "editbio");
 801         } else if (!strcasecmp(action, "editbio")) {
 802                 save_edit("Your bio", "EBIO", 0);
 803         } else if (!strcasecmp(action, "confirm_delete_room")) {
 804                 confirm_delete_room();
 805         } else if (!strcasecmp(action, "delete_room")) {
 806                 delete_room();
 807         } else if (!strcasecmp(action, "validate")) {
 808                 validate();
 809         } else if (!strcasecmp(action, "display_editpic")) {
 810                 display_graphics_upload("your photo",
 811                                         "UIMG 0|_userpic_",
 812                                         "/editpic");
 813         } else if (!strcasecmp(action, "editpic")) {
 814                 do_graphics_upload("UIMG 1|_userpic_");
 815         } else if (!strcasecmp(action, "display_editroompic")) {
 816                 display_graphics_upload("the graphic for this room",
 817                                         "UIMG 0|_roompic_",
 818                                         "/editroompic");
 819         } else if (!strcasecmp(action, "editroompic")) {
 820                 do_graphics_upload("UIMG 1|_roompic_");
 821         } else if (!strcasecmp(action, "select_floor_to_edit_pic")) {
 822                 select_floor_to_edit_pic();
 823         } else if (!strcasecmp(action, "display_editfloorpic")) {
 824                 sprintf(buf, "UIMG 0|_floorpic_|%s",
 825                         bstr("which_floor"));
 826                 display_graphics_upload("the graphic for this floor",
 827                                         buf,
 828                                         "/editfloorpic");
 829         } else if (!strcasecmp(action, "editfloorpic")) {
 830                 sprintf(buf, "UIMG 1|_floorpic_|%s",
 831                         bstr("which_floor"));
 832                 do_graphics_upload(buf);
 833         } else if (!strcasecmp(action, "display_reg")) {
 834                 display_reg(0);
 835         } else if (!strcasecmp(action, "register")) {
 836                 register_user();
 837         } else if (!strcasecmp(action, "display_changepw")) {
 838                 display_changepw();
 839         } else if (!strcasecmp(action, "changepw")) {
 840                 changepw();
 841         } else if (!strcasecmp(action, "display_edit_node")) {
 842                 display_edit_node();
 843         } else if (!strcasecmp(action, "display_netconf")) {
 844                 display_netconf();
 845         } else if (!strcasecmp(action, "display_confirm_unshare")) {
 846                 display_confirm_unshare();
 847         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
 848                 display_confirm_delete_node();
 849         } else if (!strcasecmp(action, "delete_node")) {
 850                 delete_node();
 851         } else if (!strcasecmp(action, "unshare")) {
 852                 unshare();
 853         } else if (!strcasecmp(action, "display_add_node")) {
 854                 display_add_node();
 855         } else if (!strcasecmp(action, "add_node")) {
 856                 add_node();
 857         } else if (!strcasecmp(action, "display_share")) {
 858                 display_share();
 859         } else if (!strcasecmp(action, "share")) {
 860                 share();
 861         } else if (!strcasecmp(action, "terminate_session")) {
 862                 slrp_highest();
 863                 terminate_session();
 864         } else if (!strcasecmp(action, "edit_me")) {
 865                 edit_me();
 866         } else if (!strcasecmp(action, "display_siteconfig")) {
 867                 display_siteconfig();
 868         } else if (!strcasecmp(action, "siteconfig")) {
 869                 siteconfig();
 870         } else if (!strcasecmp(action, "display_generic")) {
 871                 display_generic();
 872         } else if (!strcasecmp(action, "do_generic")) {
 873                 do_generic();
 874         } else if (!strcasecmp(action, "display_menubar")) {
 875                 display_menubar(1);
 876         } else if (!strcasecmp(action, "diagnostics")) {
 877                 wprintf("HTTP/1.0 200 OK\n");
 878                 output_headers(1);
 879
 880                 wprintf("You're in session %d<HR>\n", WC->wc_session);
 881                 wprintf("Command: <BR><PRE>\n");
 882                 escputs(cmd);
 883                 wprintf("</PRE><HR>\n");
 884                 wprintf("Variables: <BR><PRE>\n");
 885                 dump_vars();
 886                 wprintf("</PRE><HR>\n");
 887                 wDumpContent(1);
 888         }
 889         /* When all else fais, display the main menu. */
 890         else {
 891                 display_main_menu();
 892         }
 893
 894         fflush(stdout);
 895         if (content != NULL) {
 896                 free(content);
 897                 content = NULL;
 898         }
 899         free_urls();
 900         if (WC->upload_length > 0) {
 901                 free(WC->upload);
 902                 WC->upload_length = 0;
 903         }
 904 }