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  * String to unset the cookie.
  35  * Any date "in the past" will work, so I chose my birthday, right down to
  36  * the exact minute.  :)
  37  */
  38 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  39
  40 void unescape_input(char *buf)
  41 {
  42         int a, b;
  43         char hex[3];
  44
  45         while ((isspace(buf[strlen(buf) - 1])) && (strlen(buf) > 0))
  46                 buf[strlen(buf) - 1] = 0;
  47
  48         for (a = 0; a < strlen(buf); ++a) {
  49                 if (buf[a] == '+')
  50                         buf[a] = ' ';
  51                 if (buf[a] == '%') {
  52                         hex[0] = buf[a + 1];
  53                         hex[1] = buf[a + 2];
  54                         hex[2] = 0;
  55                         sscanf(hex, "%02x", &b);
  56                         buf[a] = (char) b;
  57                         strcpy(&buf[a + 1], &buf[a + 3]);
  58                 }
  59         }
  60
  61 }
  62
  63
  64 void addurls(char *url)
  65 {
  66         char *up, *ptr;
  67         char buf[256];
  68         int a, b;
  69         struct urlcontent *u;
  70
  71         up = url;
  72         while (strlen(up) > 0) {
  73
  74                 /* locate the = sign */
  75                 strncpy(buf, up, 255);
  76                 b = (-1);
  77                 for (a = 255; a >= 0; --a)
  78                         if (buf[a] == '=')
  79                                 b = a;
  80                 if (b < 0)
  81                         return;
  82                 buf[b] = 0;
  83
  84                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
  85                 u->next = WC->urlstrings;
  86                 WC->urlstrings = u;
  87                 strcpy(u->url_key, buf);
  88
  89                 /* now chop that part off */
  90                 for (a = 0; a <= b; ++a)
  91                         ++up;
  92
  93                 /* locate the & sign */
  94                 ptr = up;
  95                 b = strlen(up);
  96                 for (a = 0; a < strlen(up); ++a) {
  97                         if (!strncmp(ptr, "&", 1)) {
  98                                 b = a;
  99                                 break;
 100                         }
 101                         ++ptr;
 102                 }
 103                 ptr = up;
 104                 for (a = 0; a < b; ++a)
 105                         ++ptr;
 106                 strcpy(ptr, "");
 107
 108                 u->url_data = malloc(strlen(up) + 1);
 109                 strcpy(u->url_data, up);
 110                 u->url_data[b] = 0;
 111                 unescape_input(u->url_data);
 112                 up = ptr;
 113                 ++up;
 114         }
 115 }
 116
 117 void free_urls(void)
 118 {
 119         struct urlcontent *u;
 120
 121         while (WC->urlstrings != NULL) {
 122                 free(WC->urlstrings->url_data);
 123                 u = WC->urlstrings->next;
 124                 free(WC->urlstrings);
 125                 WC->urlstrings = u;
 126         }
 127 }
 128
 129 /*
 130  * Diagnostic function to display the contents of all variables
 131  */
 132 void dump_vars(void)
 133 {
 134         struct urlcontent *u;
 135
 136         for (u = WC->urlstrings; u != NULL; u = u->next) {
 137                 wprintf("%38s = %s\n", u->url_key, u->url_data);
 138         }
 139 }
 140
 141 char *bstr(char *key)
 142 {
 143         struct urlcontent *u;
 144
 145         for (u = WC->urlstrings; u != NULL; u = u->next) {
 146                 if (!strcasecmp(u->url_key, key))
 147                         return (u->url_data);
 148         }
 149         return ("");
 150 }
 151
 152
 153 void wprintf(const char *format,...)
 154 {
 155         va_list arg_ptr;
 156         char wbuf[1024];
 157
 158         va_start(arg_ptr, format);
 159         vsprintf(wbuf, format, arg_ptr);
 160         va_end(arg_ptr);
 161
 162         write(WC->http_sock, wbuf, strlen(wbuf));
 163 }
 164
 165
 166 /*
 167  * wDumpContent() wraps up an HTTP session, closes tags, etc.
 168  *
 169  * print_standard_html_footer should be set to 0 to transmit only, 1 to
 170  * append the main menu and closing tags, or 2 to
 171  * append the closing tags only.
 172  */
 173 void wDumpContent(int print_standard_html_footer)
 174 {
 175         if (WC->fake_frames) {
 176                 wprintf("<CENTER><FONT SIZE=-1>"
 177                         "<TABLE border=0 width=100%><TR>"
 178                         "<TD><A HREF=\"/ungoto\">"
 179                         "<IMG SRC=\"/static/back.gif\" BORDER=0>"
 180                         "Ungoto</A></TD>");
 181                 wprintf("<TD><A HREF=\"#TheTop\">"
 182                         "<IMG SRC=\"/static/up.gif\" BORDER=0>"
 183                         "Top of page</A></TD>");
 184                 wprintf("<TD><A HREF=\"/display_enter\">"
 185                         "<IMG SRC=\"/static/enter.gif\" BORDER=0>"
 186                         "Enter a message</A></TD>");
 187                 wprintf("<TD><A HREF=\"/gotonext\">"
 188                         "Goto next room"
 189                         "<IMG SRC=\"/static/forward.gif\" BORDER=0></A></TD>"
 190                         "</TR></TABLE>"
 191                         "</FONT>\n"
 192                         "</TD></TR></TABLE></TABLE>\n");
 193                 WC->fake_frames = 0;
 194         }
 195
 196         if (print_standard_html_footer) {
 197                 if (print_standard_html_footer != 2) {
 198                         wprintf("<BR>");
 199                 }
 200                 wprintf("</BODY></HTML>\n");
 201         }
 202
 203
 204 }
 205
 206
 207 void escputs1(char *strbuf, int nbsp)
 208 {
 209         int a;
 210
 211         for (a = 0; a < strlen(strbuf); ++a) {
 212                 if (strbuf[a] == '<')
 213                         wprintf("&lt;");
 214                 else if (strbuf[a] == '>')
 215                         wprintf("&gt;");
 216                 else if (strbuf[a] == '&')
 217                         wprintf("&amp;");
 218                 else if (strbuf[a] == '\"')
 219                         wprintf("&quot;");
 220                 else if (strbuf[a] == '\'')
 221                         wprintf("&#39;");
 222                 else if (strbuf[a] == LB)
 223                         wprintf("<");
 224                 else if (strbuf[a] == RB)
 225                         wprintf(">");
 226                 else if (strbuf[a] == QU)
 227                         wprintf("\"");
 228                 else if ((strbuf[a] == 32) && (nbsp == 1)) {
 229                         wprintf("&nbsp;");
 230                 } else {
 231                         wprintf("%c", strbuf[a]);
 232                 }
 233         }
 234 }
 235
 236 void escputs(char *strbuf)
 237 {
 238         escputs1(strbuf, 0);
 239 }
 240
 241
 242
 243 char *urlesc(char *strbuf)
 244 {
 245         int a, b, c;
 246         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 247         static char outbuf[512];
 248
 249         strcpy(outbuf, "");
 250
 251         for (a = 0; a < strlen(strbuf); ++a) {
 252                 c = 0;
 253                 for (b = 0; b < strlen(ec); ++b) {
 254                         if (strbuf[a] == ec[b])
 255                                 c = 1;
 256                 }
 257                 b = strlen(outbuf);
 258                 if (c == 1)
 259                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 260                 else
 261                         sprintf(&outbuf[b], "%c", strbuf[a]);
 262         }
 263         return (outbuf);
 264 }
 265
 266 void urlescputs(char *strbuf)
 267 {
 268         wprintf("%s", urlesc(strbuf));
 269 }
 270
 271
 272
 273
 274 /*
 275  * Output all that important stuff that the browser will want to see
 276  *
 277  * control codes:
 278  *
 279  * Bits 0 and 1:
 280  * 0 = Nothing.  Do not display any leading HTTP or HTML.
 281  * 1 = HTTP headers plus the "fake frames" found in most windows.
 282  * 2 = HTTP headers required to terminate the session (unset cookies)
 283  * 3 = HTTP and HTML headers, but no 'fake frames'
 284  *
 285  * Bit 2: Set to 1 to auto-refresh page every 30 seconds
 286  *
 287  * Bit 3: suppress check for express messages
 288  */
 289 void output_headers(int controlcode)
 290 {
 291         char cookie[256];
 292         int print_standard_html_head = 0;
 293         int refresh30 = 0;
 294         int suppress_check = 0;
 295         char httpnow[256];
 296         static int pageseq = 0;
 297
 298         print_standard_html_head        =       controlcode & 0x03;
 299         refresh30                       =       ((controlcode & 0x04) >> 2);
 300         suppress_check                  =       ((controlcode & 0x08) >> 3);
 301
 302         wprintf("HTTP/1.0 200 OK\n");
 303
 304         httpdate(httpnow, time(NULL));
 305
 306         if (print_standard_html_head > 0) {
 307                 wprintf("Content-type: text/html\n");
 308                 wprintf("Server: %s\n", SERVER);
 309                 wprintf("Connection: close\n");
 310                 wprintf("Pragma: no-cache\n");
 311                 wprintf("Cache-Control: no-store\n");
 312         }
 313         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 314                         WC->wc_password, WC->wc_roomname);
 315         if (print_standard_html_head == 2) {
 316                 wprintf("Set-cookie: webcit=%s\n", unset);
 317         } else {
 318                 wprintf("Set-cookie: webcit=%s\n", cookie);
 319         }
 320
 321         if (print_standard_html_head > 0) {
 322                 wprintf("\n");
 323                 wprintf("<HTML><HEAD><TITLE>");
 324                 escputs(serv_info.serv_humannode);
 325                 wprintf("</TITLE>\n"
 326                         "<META HTTP-EQUIV=\"Expires\" CONTENT=\"0\">\n"
 327                         "<META HTTP-EQUIV=\"Pragma\" CONTENT=\"no-cache\">\n");
 328                 if (refresh30) wprintf(
 329                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"30\">\n");
 330                 wprintf("</HEAD>\n");
 331
 332                 /* script for checking for express msgs (not always launch) */
 333                 wprintf("<SCRIPT LANGUAGE=\"JavaScript\">\n");
 334                 wprintf("function launch_page_popup() {\n");
 335                 wprintf("pwin = window.open('/page_popup', 'CitaPage%d', 'toolbar=no,location=no,copyhistory=no,status=yes,scrollbars=yes');\n");
 336                 wprintf("}\n");
 337                 wprintf("</SCRIPT>\n", ++pageseq);
 338                 /* end script */
 339
 340                 /* JavaScript keyboard-based navigation would go here if it
 341                  * were finished
 342                  */
 343
 344                 wprintf("<BODY ");
 345                 if (!suppress_check) if (WC->HaveExpressMessages) {
 346                         wprintf("onload=\"launch_page_popup()\" ");
 347                         WC->HaveExpressMessages = 0;
 348                 }
 349                 wprintf("BACKGROUND=\"/image&name=background\" TEXT=\"#000000\" LINK=\"#004400\">\n");
 350
 351         if (print_standard_html_head == 1) {
 352                 wprintf("<A NAME=\"TheTop\"></A>"
 353                         "<TABLE border=0 width=100%>"
 354                         "<TR VALIGN=TOP><TD VALIGN=LEFT CELLPADDING=0>");
 355
 356                 display_menubar(0);
 357
 358                 wprintf("</TD><TD VALIGN=TOP>"
 359                         "<TABLE border=0 width=100%><TR VALIGN=TOP>"
 360                         "<TD>\n");
 361
 362                 embed_room_banner(NULL);
 363
 364                 wprintf("</TD></TR><TR VALIGN=TOP><TD>\n");
 365
 366                 WC->fake_frames = 1;
 367                 }
 368         }
 369 }
 370
 371
 372 /*
 373  *
 374  */
 375 void http_redirect(char *whichpage) {
 376         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 377         wprintf("Location: %s\n", whichpage);
 378         wprintf("URI: %s\n", whichpage);
 379         wprintf("Content-type: text/html\n\n");
 380         wprintf("<html><body>\n");
 381         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 382                 whichpage);
 383         wprintf("</body></html>\n");
 384 }
 385
 386
 387
 388 void check_for_express_messages()
 389 {
 390         char buf[256];
 391
 392         serv_puts("NOOP");
 393         serv_gets(buf);
 394         if (buf[3] == '*') WC->HaveExpressMessages = 1;
 395 }
 396
 397
 398
 399
 400 void output_static(char *what)
 401 {
 402         char buf[4096];
 403         long thisblock;
 404         FILE *fp;
 405         struct stat statbuf;
 406         off_t bytes;
 407
 408         sprintf(buf, "static/%s", what);
 409         fp = fopen(buf, "rb");
 410         if (fp == NULL) {
 411                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 412                 wprintf("Content-Type: text/plain\n");
 413                 wprintf("\n");
 414                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 415         } else {
 416                 output_headers(0);
 417
 418                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 419                         wprintf("Content-type: image/gif\n");
 420                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 421                         wprintf("Content-type: text/plain\n");
 422                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 423                         wprintf("Content-type: image/jpeg\n");
 424                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 425                         wprintf("Content-type: text/html\n");
 426                 else
 427                         wprintf("Content-type: application/octet-stream\n");
 428
 429                 fstat(fileno(fp), &statbuf);
 430                 bytes = statbuf.st_size;
 431                 fprintf(stderr, "Static: %s, %ld bytes\n", what, bytes);
 432                 wprintf("Content-length: %ld\n", (long) bytes);
 433                 wprintf("\n");
 434                 while (bytes > 0) {
 435                         thisblock = sizeof(buf);
 436                         if (thisblock > bytes) thisblock = bytes;
 437                         fread(buf, thisblock, 1, fp);
 438                         write(WC->http_sock, buf, thisblock);
 439                         bytes = bytes - thisblock;
 440                 }
 441                 fclose(fp);
 442         }
 443         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 444                 end_webcit_session();
 445         }
 446 }
 447
 448 /*
 449  * When the browser requests an image file from the Citadel server,
 450  * this function is called to transmit it.
 451  */
 452 void output_image()
 453 {
 454         char buf[256];
 455         char xferbuf[4096];
 456         off_t bytes;
 457         off_t thisblock;
 458         off_t accomplished = 0L;
 459
 460
 461         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 462         serv_gets(buf);
 463         if (buf[0] == '2') {
 464                 bytes = extract_long(&buf[4], 0);
 465                 output_headers(0);
 466                 wprintf("Content-type: image/gif\n");
 467                 wprintf("Content-length: %ld\n", (long) bytes);
 468                 wprintf("\n");
 469
 470                 while (bytes > (off_t) 0) {
 471                         thisblock = (off_t) sizeof(xferbuf);
 472                         if (thisblock > bytes)
 473                                 thisblock = bytes;
 474                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 475                         serv_gets(buf);
 476                         if (buf[0] == '6')
 477                                 thisblock = extract_long(&buf[4], 0);
 478                         serv_read(xferbuf, (int) thisblock);
 479                         write(WC->http_sock, xferbuf, thisblock);
 480                         bytes = bytes - thisblock;
 481                         accomplished = accomplished + thisblock;
 482                 }
 483                 serv_puts("CLOS");
 484                 serv_gets(buf);
 485         } else {
 486                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 487                 output_headers(0);
 488                 wprintf("Content-Type: text/plain\n");
 489                 wprintf("\n");
 490                 wprintf("Error retrieving image\n");
 491         }
 492
 493 }
 494
 495
 496 /*
 497  * Convenience functions to display a page containing only a string
 498  */
 499 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 500 {
 501         wprintf("HTTP/1.0 200 OK\n");
 502         output_headers(1);
 503         wprintf("<TABLE WIDTH=100% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
 504         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 505         wprintf("<B>%s</B>\n", titlebarmsg);
 506         wprintf("</FONT></TD></TR></TABLE><BR>\n");
 507         escputs(messagetext);
 508
 509         wprintf("<HR>\n");
 510         embed_main_menu();
 511         wDumpContent(1);
 512 }
 513
 514 void display_error(char *errormessage)
 515 {
 516         convenience_page("770000", "Error", errormessage);
 517 }
 518
 519 void display_success(char *successmessage)
 520 {
 521         convenience_page("007700", "OK", successmessage);
 522 }
 523
 524
 525
 526 void extract_action(char *actbuf, char *cmdbuf)
 527 {
 528         int i;
 529
 530         strcpy(actbuf, cmdbuf);
 531         if (!strncasecmp(actbuf, "GET /", 5))
 532                 strcpy(actbuf, &actbuf[5]);
 533         if (!strncasecmp(actbuf, "PUT /", 5))
 534                 strcpy(actbuf, &actbuf[5]);
 535         if (!strncasecmp(actbuf, "POST /", 6))
 536                 strcpy(actbuf, &actbuf[6]);
 537
 538         for (i = 0; i < strlen(actbuf); ++i) {
 539                 if (actbuf[i] == ' ') {
 540                         actbuf[i] = 0;
 541                         i = 0;
 542                 }
 543                 if (actbuf[i] == '/') {
 544                         actbuf[i] = 0;
 545                         i = 0;
 546                 }
 547                 if (actbuf[i] == '?') {
 548                         actbuf[i] = 0;
 549                         i = 0;
 550                 }
 551                 if (actbuf[i] == '&') {
 552                         actbuf[i] = 0;
 553                         i = 0;
 554                 }
 555         }
 556 }
 557
 558
 559 void upload_handler(char *name, char *filename, char *encoding,
 560                     void *content, char *cbtype, size_t length)
 561 {
 562
 563         fprintf(stderr, "UPLOAD HANDLER CALLED\n");
 564         fprintf(stderr, "    name = %s\n", name);
 565         fprintf(stderr, "filename = %s\n", filename);
 566         fprintf(stderr, "encoding = %s\n", encoding);
 567         fprintf(stderr, "    type = %s\n", cbtype);
 568         fprintf(stderr, "  length = %ld\n", (long)length);
 569
 570         if (strlen(name) > 0) {
 571                 WC->upload = malloc(length);
 572                 if (WC->upload != NULL) {
 573                         WC->upload_length = length;
 574                         memcpy(WC->upload, content, length);
 575                 }
 576         }
 577 }
 578
 579
 580 /*
 581  * Entry point for WebCit transaction
 582  */
 583 void session_loop(struct httprequest *req)
 584 {
 585         char cmd[256];
 586         char action[256];
 587         char buf[256];
 588         int a, b;
 589         int ContentLength = 0;
 590         int BytesRead;
 591         char ContentType[512];
 592         char *content;
 593         struct httprequest *hptr;
 594         char browser_host[256];
 595         char user_agent[256];
 596
 597         /* We stuff these with the values coming from the client cookies,
 598          * so we can use them to reconnect a timed out session if we have to.
 599          */
 600         char c_host[256];
 601         char c_port[256];
 602         char c_username[256];
 603         char c_password[256];
 604         char c_roomname[256];
 605         char cookie[256];
 606
 607         strcpy(c_host, defaulthost);
 608         strcpy(c_port, defaultport);
 609         strcpy(c_username, "");
 610         strcpy(c_password, "");
 611         strcpy(c_roomname, "");
 612
 613         WC->upload_length = 0;
 614         WC->upload = NULL;
 615
 616         hptr = req;
 617         if (hptr == NULL) return;
 618
 619         strcpy(cmd, hptr->line);
 620         hptr = hptr->next;
 621         extract_action(action, cmd);
 622
 623         while (hptr != NULL) {
 624                 strcpy(buf, hptr->line);
 625                 hptr = hptr->next;
 626
 627                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 628                         strcpy(cookie, &buf[15]);
 629                         cookie_to_stuff(cookie, NULL,
 630                                       c_username, c_password, c_roomname);
 631                 }
 632                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 633                         ContentLength = atoi(&buf[16]);
 634                 }
 635                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 636                         strcpy(ContentType, &buf[14]);
 637                 }
 638                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 639                         strcpy(user_agent, &buf[12]);
 640                 }
 641         }
 642
 643         if (ContentLength > 0) {
 644                 fprintf(stderr, "Content length: %d\n", ContentLength);
 645                 content = malloc(ContentLength + 1);
 646                 memset(content, 0, ContentLength+1);
 647                 BytesRead = 0;
 648
 649                 while (BytesRead < ContentLength) {
 650                         a=read(WC->http_sock, &content[BytesRead],
 651                                 ContentLength - BytesRead);
 652                         if (a <= 0) BytesRead = ContentLength;
 653                         else BytesRead += a;
 654                 }
 655
 656                 if (!strncasecmp(ContentType,
 657                               "application/x-www-form-urlencoded", 33)) {
 658                         addurls(content);
 659                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 660                         mime_parser(content, ContentLength, ContentType,
 661                                     *upload_handler);
 662                 }
 663         } else {
 664                 content = NULL;
 665         }
 666
 667         /* If there are variables in the URL, we must grab them now */
 668         for (a = 0; a < strlen(cmd); ++a)
 669                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 670                         for (b = a; b < strlen(cmd); ++b)
 671                                 if (isspace(cmd[b]))
 672                                         cmd[b] = 0;
 673                         addurls(&cmd[a + 1]);
 674                         cmd[a] = 0;
 675                 }
 676         /*
 677          * If we're not connected to a Citadel server, try to hook up the
 678          * connection now.  Preference is given to the host and port specified
 679          * by browser cookies, if cookies have been supplied.
 680          */
 681         if (!WC->connected) {
 682                 if (strlen(bstr("host")) > 0)
 683                         strcpy(c_host, bstr("host"));
 684                 if (strlen(bstr("port")) > 0)
 685                         strcpy(c_port, bstr("port"));
 686
 687                 if (!strcasecmp(c_host, "uds")) {
 688                         /* unix domain socket */
 689                         sprintf(buf, "%s/citadel.socket", c_port);
 690                         WC->serv_sock = uds_connectsock(buf);
 691                 }
 692                 else {
 693                         /* tcp socket */
 694                         WC->serv_sock = tcp_connectsock(c_host, c_port);
 695                 }
 696
 697                 if (WC->serv_sock < 0) {
 698                         do_logout();
 699                 }
 700
 701                 WC->connected = 1;
 702                 serv_gets(buf); /* get the server welcome message */
 703                 locate_host(browser_host, WC->http_sock);
 704                 get_serv_info(browser_host, user_agent);
 705         }
 706
 707         check_for_express_messages();
 708
 709         /*
 710          * If we're not logged in, but we have username and password cookies
 711          * supplied by the browser, try using them to log in.
 712          */
 713         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 714                 serv_printf("USER %s", c_username);
 715                 serv_gets(buf);
 716                 if (buf[0] == '3') {
 717                         serv_printf("PASS %s", c_password);
 718                         serv_gets(buf);
 719                         if (buf[0] == '2') {
 720                                 become_logged_in(c_username, c_password, buf);
 721                         }
 722                 }
 723         }
 724         /*
 725          * If we don't have a current room, but a cookie specifying the
 726          * current room is supplied, make an effort to go there.
 727          */
 728         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 729                 serv_printf("GOTO %s", c_roomname);
 730                 serv_gets(buf);
 731                 if (buf[0] == '2') {
 732                         strcpy(WC->wc_roomname, c_roomname);
 733                 }
 734         }
 735         if (!strcasecmp(action, "static")) {
 736                 strcpy(buf, &cmd[12]);
 737                 for (a = 0; a < strlen(buf); ++a)
 738                         if (isspace(buf[a]))
 739                                 buf[a] = 0;
 740                 output_static(buf);
 741         } else if (!strcasecmp(action, "image")) {
 742                 output_image();
 743         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
 744                 do_login();
 745         } else if (!WC->logged_in) {
 746                 display_login(NULL);
 747         }
 748         /* Various commands... */
 749
 750         else if (!strcasecmp(action, "do_welcome")) {
 751                 do_welcome();
 752         } else if (!strcasecmp(action, "display_main_menu")) {
 753                 display_main_menu();
 754         } else if (!strcasecmp(action, "advanced")) {
 755                 display_advanced_menu();
 756         } else if (!strcasecmp(action, "whobbs")) {
 757                 whobbs();
 758         } else if (!strcasecmp(action, "knrooms")) {
 759                 list_all_rooms_by_floor();
 760         } else if (!strcasecmp(action, "gotonext")) {
 761                 slrp_highest();
 762                 gotonext();
 763         } else if (!strcasecmp(action, "skip")) {
 764                 gotonext();
 765         } else if (!strcasecmp(action, "ungoto")) {
 766                 ungoto();
 767         } else if (!strcasecmp(action, "dotgoto")) {
 768                 slrp_highest();
 769                 smart_goto(bstr("room"));
 770         } else if (!strcasecmp(action, "termquit")) {
 771                 do_logout();
 772         } else if (!strcasecmp(action, "readnew")) {
 773                 readloop("readnew");
 774         } else if (!strcasecmp(action, "readold")) {
 775                 readloop("readold");
 776         } else if (!strcasecmp(action, "readfwd")) {
 777                 readloop("readfwd");
 778         } else if (!strcasecmp(action, "headers")) {
 779                 readloop("headers");
 780         } else if (!strcasecmp(action, "display_enter")) {
 781                 display_enter();
 782         } else if (!strcasecmp(action, "post")) {
 783                 post_message();
 784         } else if (!strcasecmp(action, "confirm_delete_msg")) {
 785                 confirm_delete_msg();
 786         } else if (!strcasecmp(action, "delete_msg")) {
 787                 delete_msg();
 788         } else if (!strcasecmp(action, "confirm_move_msg")) {
 789                 confirm_move_msg();
 790         } else if (!strcasecmp(action, "move_msg")) {
 791                 move_msg();
 792         } else if (!strcasecmp(action, "userlist")) {
 793                 userlist();
 794         } else if (!strcasecmp(action, "showuser")) {
 795                 showuser();
 796         } else if (!strcasecmp(action, "display_page")) {
 797                 display_page();
 798         } else if (!strcasecmp(action, "page_user")) {
 799                 page_user();
 800         } else if (!strcasecmp(action, "chat")) {
 801                 do_chat();
 802         } else if (!strcasecmp(action, "display_private")) {
 803                 display_private("", 0);
 804         } else if (!strcasecmp(action, "goto_private")) {
 805                 goto_private();
 806         } else if (!strcasecmp(action, "zapped_list")) {
 807                 zapped_list();
 808         } else if (!strcasecmp(action, "display_zap")) {
 809                 display_zap();
 810         } else if (!strcasecmp(action, "zap")) {
 811                 zap();
 812         } else if (!strcasecmp(action, "display_entroom")) {
 813                 display_entroom();
 814         } else if (!strcasecmp(action, "entroom")) {
 815                 entroom();
 816         } else if (!strcasecmp(action, "display_editroom")) {
 817                 display_editroom();
 818         } else if (!strcasecmp(action, "editroom")) {
 819                 editroom();
 820         } else if (!strcasecmp(action, "display_editinfo")) {
 821                 display_edit("Room info", "EINF 0", "RINF", "/editinfo");
 822         } else if (!strcasecmp(action, "editinfo")) {
 823                 save_edit("Room info", "EINF 1", 1);
 824         } else if (!strcasecmp(action, "display_editbio")) {
 825                 sprintf(buf, "RBIO %s", WC->wc_username);
 826                 display_edit("Your bio", "NOOP", buf, "editbio");
 827         } else if (!strcasecmp(action, "editbio")) {
 828                 save_edit("Your bio", "EBIO", 0);
 829         } else if (!strcasecmp(action, "confirm_delete_room")) {
 830                 confirm_delete_room();
 831         } else if (!strcasecmp(action, "delete_room")) {
 832                 delete_room();
 833         } else if (!strcasecmp(action, "validate")) {
 834                 validate();
 835         } else if (!strcasecmp(action, "display_editpic")) {
 836                 display_graphics_upload("your photo",
 837                                         "UIMG 0|_userpic_",
 838                                         "/editpic");
 839         } else if (!strcasecmp(action, "editpic")) {
 840                 do_graphics_upload("UIMG 1|_userpic_");
 841         } else if (!strcasecmp(action, "display_editroompic")) {
 842                 display_graphics_upload("the graphic for this room",
 843                                         "UIMG 0|_roompic_",
 844                                         "/editroompic");
 845         } else if (!strcasecmp(action, "editroompic")) {
 846                 do_graphics_upload("UIMG 1|_roompic_");
 847         } else if (!strcasecmp(action, "select_floor_to_edit_pic")) {
 848                 select_floor_to_edit_pic();
 849         } else if (!strcasecmp(action, "display_editfloorpic")) {
 850                 sprintf(buf, "UIMG 0|_floorpic_|%s",
 851                         bstr("which_floor"));
 852                 display_graphics_upload("the graphic for this floor",
 853                                         buf,
 854                                         "/editfloorpic");
 855         } else if (!strcasecmp(action, "editfloorpic")) {
 856                 sprintf(buf, "UIMG 1|_floorpic_|%s",
 857                         bstr("which_floor"));
 858                 do_graphics_upload(buf);
 859         } else if (!strcasecmp(action, "display_reg")) {
 860                 display_reg(0);
 861         } else if (!strcasecmp(action, "register")) {
 862                 register_user();
 863         } else if (!strcasecmp(action, "display_changepw")) {
 864                 display_changepw();
 865         } else if (!strcasecmp(action, "changepw")) {
 866                 changepw();
 867         } else if (!strcasecmp(action, "display_edit_node")) {
 868                 display_edit_node();
 869         } else if (!strcasecmp(action, "display_netconf")) {
 870                 display_netconf();
 871         } else if (!strcasecmp(action, "display_confirm_unshare")) {
 872                 display_confirm_unshare();
 873         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
 874                 display_confirm_delete_node();
 875         } else if (!strcasecmp(action, "delete_node")) {
 876                 delete_node();
 877         } else if (!strcasecmp(action, "unshare")) {
 878                 unshare();
 879         } else if (!strcasecmp(action, "display_add_node")) {
 880                 display_add_node();
 881         } else if (!strcasecmp(action, "add_node")) {
 882                 add_node();
 883         } else if (!strcasecmp(action, "display_share")) {
 884                 display_share();
 885         } else if (!strcasecmp(action, "share")) {
 886                 share();
 887         } else if (!strcasecmp(action, "terminate_session")) {
 888                 slrp_highest();
 889                 terminate_session();
 890         } else if (!strcasecmp(action, "edit_me")) {
 891                 edit_me();
 892         } else if (!strcasecmp(action, "display_siteconfig")) {
 893                 display_siteconfig();
 894         } else if (!strcasecmp(action, "page_popup")) {
 895                 page_popup();
 896         } else if (!strcasecmp(action, "siteconfig")) {
 897                 siteconfig();
 898         } else if (!strcasecmp(action, "display_generic")) {
 899                 display_generic();
 900         } else if (!strcasecmp(action, "do_generic")) {
 901                 do_generic();
 902         } else if (!strcasecmp(action, "display_menubar")) {
 903                 display_menubar(1);
 904         } else if (!strcasecmp(action, "diagnostics")) {
 905                 output_headers(1);
 906
 907                 wprintf("You're in session %d<HR>\n", WC->wc_session);
 908                 wprintf("Command: <BR><PRE>\n");
 909                 escputs(cmd);
 910                 wprintf("</PRE><HR>\n");
 911                 wprintf("Variables: <BR><PRE>\n");
 912                 dump_vars();
 913                 wprintf("</PRE><HR>\n");
 914                 wDumpContent(1);
 915         }
 916         /* When all else fais, display the main menu. */
 917         else {
 918                 display_main_menu();
 919         }
 920
 921         fflush(stdout);
 922         if (content != NULL) {
 923                 free(content);
 924                 content = NULL;
 925         }
 926         free_urls();
 927         if (WC->upload_length > 0) {
 928                 free(WC->upload);
 929                 WC->upload_length = 0;
 930         }
 931 }