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 #include "mime_parser.h"
  33
  34 /*
  35  * String to unset the cookie.
  36  * Any date "in the past" will work, so I chose my birthday, right down to
  37  * the exact minute.  :)
  38  */
  39 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  40
  41 void unescape_input(char *buf)
  42 {
  43         int a, b;
  44         char hex[3];
  45
  46         while ((isspace(buf[strlen(buf) - 1])) && (strlen(buf) > 0))
  47                 buf[strlen(buf) - 1] = 0;
  48
  49         for (a = 0; a < strlen(buf); ++a) {
  50                 if (buf[a] == '+')
  51                         buf[a] = ' ';
  52                 if (buf[a] == '%') {
  53                         hex[0] = buf[a + 1];
  54                         hex[1] = buf[a + 2];
  55                         hex[2] = 0;
  56                         sscanf(hex, "%02x", &b);
  57                         buf[a] = (char) b;
  58                         strcpy(&buf[a + 1], &buf[a + 3]);
  59                 }
  60         }
  61
  62 }
  63
  64
  65 void addurls(char *url)
  66 {
  67         char *up, *ptr;
  68         char buf[256];
  69         int a, b;
  70         struct urlcontent *u;
  71
  72         up = url;
  73         while (strlen(up) > 0) {
  74
  75                 /* locate the = sign */
  76                 strncpy(buf, up, 255);
  77                 b = (-1);
  78                 for (a = 255; a >= 0; --a)
  79                         if (buf[a] == '=')
  80                                 b = a;
  81                 if (b < 0)
  82                         return;
  83                 buf[b] = 0;
  84
  85                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
  86                 u->next = WC->urlstrings;
  87                 WC->urlstrings = u;
  88                 strcpy(u->url_key, buf);
  89
  90                 /* now chop that part off */
  91                 for (a = 0; a <= b; ++a)
  92                         ++up;
  93
  94                 /* locate the & sign */
  95                 ptr = up;
  96                 b = strlen(up);
  97                 for (a = 0; a < strlen(up); ++a) {
  98                         if (!strncmp(ptr, "&", 1)) {
  99                                 b = a;
 100                                 break;
 101                         }
 102                         ++ptr;
 103                 }
 104                 ptr = up;
 105                 for (a = 0; a < b; ++a)
 106                         ++ptr;
 107                 strcpy(ptr, "");
 108
 109                 u->url_data = malloc(strlen(up) + 1);
 110                 strcpy(u->url_data, up);
 111                 u->url_data[b] = 0;
 112                 unescape_input(u->url_data);
 113                 up = ptr;
 114                 ++up;
 115         }
 116 }
 117
 118 void free_urls(void)
 119 {
 120         struct urlcontent *u;
 121
 122         while (WC->urlstrings != NULL) {
 123                 free(WC->urlstrings->url_data);
 124                 u = WC->urlstrings->next;
 125                 free(WC->urlstrings);
 126                 WC->urlstrings = u;
 127         }
 128 }
 129
 130 /*
 131  * Diagnostic function to display the contents of all variables
 132  */
 133 void dump_vars(void)
 134 {
 135         struct urlcontent *u;
 136
 137         for (u = WC->urlstrings; u != NULL; u = u->next) {
 138                 wprintf("%38s = %s\n", u->url_key, u->url_data);
 139         }
 140 }
 141
 142 char *bstr(char *key)
 143 {
 144         struct urlcontent *u;
 145
 146         for (u = WC->urlstrings; u != NULL; u = u->next) {
 147                 if (!strcasecmp(u->url_key, key))
 148                         return (u->url_data);
 149         }
 150         return ("");
 151 }
 152
 153
 154 void wprintf(const char *format,...)
 155 {
 156         va_list arg_ptr;
 157         char wbuf[1024];
 158
 159         va_start(arg_ptr, format);
 160         vsprintf(wbuf, format, arg_ptr);
 161         va_end(arg_ptr);
 162
 163         write(WC->http_sock, wbuf, strlen(wbuf));
 164 }
 165
 166
 167 /*
 168  * wDumpContent() wraps up an HTTP session, closes tags, etc.
 169  *
 170  * print_standard_html_footer should be set to 0 to transmit only, 1 to
 171  * append the main menu and closing tags, or 2 to
 172  * append the closing tags only.
 173  */
 174 void wDumpContent(int print_standard_html_footer)
 175 {
 176         if (WC->fake_frames) {
 177                 wprintf("</TABLE>\n");
 178                 WC->fake_frames = 0;
 179         }
 180
 181         if (print_standard_html_footer) {
 182                 if (print_standard_html_footer != 2) {
 183                         wprintf("<BR>");
 184                 }
 185                 wprintf("</BODY></HTML>\n");
 186         }
 187
 188
 189 }
 190
 191
 192 /*
 193  * Copy a string, escaping characters which have meaning in HTML.  If
 194  * nbsp is nonzero, spaces are converted to non-breaking spaces.
 195  */
 196 void stresc(char *target, char *strbuf, int nbsp)
 197 {
 198         int a;
 199         strcpy(target, "");
 200
 201         for (a = 0; a < strlen(strbuf); ++a) {
 202                 if (strbuf[a] == '<')
 203                         strcat(target, "&lt;");
 204                 else if (strbuf[a] == '>')
 205                         strcat(target, "&gt;");
 206                 else if (strbuf[a] == '&')
 207                         strcat(target, "&amp;");
 208                 else if (strbuf[a] == '\"')
 209                         strcat(target, "&quot;");
 210                 else if (strbuf[a] == '\'')
 211                         strcat(target, "&#39;");
 212                 else if (strbuf[a] == LB)
 213                         strcat(target, "<");
 214                 else if (strbuf[a] == RB)
 215                         strcat(target, ">");
 216                 else if (strbuf[a] == QU)
 217                         strcat(target, "\"");
 218                 else if ((strbuf[a] == 32) && (nbsp == 1)) {
 219                         strcat(target, "&nbsp;");
 220                 } else {
 221                         strncat(target, &strbuf[a], 1);
 222                 }
 223         }
 224 }
 225
 226 void escputs1(char *strbuf, int nbsp)
 227 {
 228         char buf[1024];
 229         stresc(buf, strbuf, nbsp);
 230         wprintf("%s", buf);
 231 }
 232
 233 void escputs(char *strbuf)
 234 {
 235         escputs1(strbuf, 0);
 236 }
 237
 238 /*
 239  * Escape a string for feeding out as a URL.
 240  * FIXME this is not threadsafe!
 241  */
 242 char *urlesc(char *strbuf)
 243 {
 244         int a, b, c;
 245         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 246         static char outbuf[1024];
 247
 248         strcpy(outbuf, "");
 249
 250         for (a = 0; a < strlen(strbuf); ++a) {
 251                 c = 0;
 252                 for (b = 0; b < strlen(ec); ++b) {
 253                         if (strbuf[a] == ec[b])
 254                                 c = 1;
 255                 }
 256                 b = strlen(outbuf);
 257                 if (c == 1)
 258                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 259                 else
 260                         sprintf(&outbuf[b], "%c", strbuf[a]);
 261         }
 262         return (outbuf);
 263 }
 264
 265 void urlescputs(char *strbuf)
 266 {
 267         wprintf("%s", urlesc(strbuf));
 268 }
 269
 270
 271
 272
 273 /*
 274  * Output all that important stuff that the browser will want to see
 275  *
 276  * control codes:
 277  *
 278  * Bits 0 and 1:
 279  * 0 = Nothing.  Do not display any leading HTTP or HTML.
 280  * 1 = HTTP headers plus the room banner
 281  * 2 = HTTP headers required to terminate the session (unset cookies)
 282  * 3 = HTTP and HTML headers, but no room banner
 283  *
 284  * Bit 2: Set to 1 to auto-refresh page every 30 seconds
 285  *
 286  * Bit 3: suppress check for express messages
 287  */
 288 void output_headers(int controlcode)
 289 {
 290         char cookie[256];
 291         int print_standard_html_head = 0;
 292         int refresh30 = 0;
 293         int suppress_check = 0;
 294         char httpnow[256];
 295         static int pageseq = 0;
 296
 297         print_standard_html_head        =       controlcode & 0x03;
 298         refresh30                       =       ((controlcode & 0x04) >> 2);
 299         suppress_check                  =       ((controlcode & 0x08) >> 3);
 300
 301         wprintf("HTTP/1.0 200 OK\n");
 302
 303         httpdate(httpnow, time(NULL));
 304
 305         if (print_standard_html_head > 0) {
 306                 wprintf("Content-type: text/html\n");
 307                 wprintf("Server: %s\n", SERVER);
 308                 wprintf("Connection: close\n");
 309                 wprintf("Pragma: no-cache\n");
 310                 wprintf("Cache-Control: no-store\n");
 311         }
 312         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 313                         WC->wc_password, WC->wc_roomname);
 314         if (print_standard_html_head == 2) {
 315                 wprintf("Set-cookie: webcit=%s\n", unset);
 316         } else {
 317                 wprintf("Set-cookie: webcit=%s\n", cookie);
 318         }
 319
 320         if (print_standard_html_head > 0) {
 321                 wprintf("\n");
 322                 wprintf("<HTML><HEAD><TITLE>");
 323                 escputs(serv_info.serv_humannode);
 324                 wprintf("</TITLE>\n"
 325                         "<META HTTP-EQUIV=\"Expires\" CONTENT=\"0\">\n"
 326                         "<META HTTP-EQUIV=\"Pragma\" CONTENT=\"no-cache\">\n");
 327                 if (refresh30) wprintf(
 328                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"30\">\n");
 329                 wprintf("</HEAD>\n");
 330
 331                 /* script for checking for express msgs (not always launch) */
 332                 wprintf("<SCRIPT LANGUAGE=\"JavaScript\">\n");
 333                 wprintf("function launch_page_popup() {\n");
 334                 wprintf("pwin = window.open('/page_popup', 'CitaPage%d', 'toolbar=no,location=no,copyhistory=no,status=no,scrollbars=yes,resizable=no,height=150,width=400');\n");
 335                 wprintf("}\n");
 336                 wprintf("</SCRIPT>\n", ++pageseq);
 337                 /* end script */
 338
 339                 /* JavaScript keyboard-based navigation would go here if it
 340                  * were finished
 341                  */
 342
 343                 if (!suppress_check) if (WC->HaveExpressMessages) {
 344                         svprintf("extrabodyparms", WCS_STRING, "%s",
 345                                 "onload=\"launch_page_popup()\" ");
 346                         WC->HaveExpressMessages = 0;
 347                 }
 348                 do_template("background.html");
 349                 clear_local_substs();
 350
 351         if (print_standard_html_head == 1) {
 352                 wprintf("<A NAME=\"TheTop\"></A>");
 353
 354                 wprintf("<TABLE border=0 width=100%%><TR VALIGN=TOP>"
 355                         "<TD>\n");
 356
 357                 embed_room_banner(NULL);
 358
 359                 wprintf("</TD></TR><TR VALIGN=TOP><TD>\n");
 360
 361                 WC->fake_frames = 1;
 362                 }
 363         }
 364 }
 365
 366
 367 /*
 368  *
 369  */
 370 void http_redirect(char *whichpage) {
 371         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 372         wprintf("Location: %s\n", whichpage);
 373         wprintf("URI: %s\n", whichpage);
 374         wprintf("Content-type: text/html\n\n");
 375         wprintf("<html><body>\n");
 376         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 377                 whichpage);
 378         wprintf("</body></html>\n");
 379 }
 380
 381
 382
 383 void check_for_express_messages()
 384 {
 385         char buf[256];
 386
 387         serv_puts("NOOP");
 388         serv_gets(buf);
 389         if (buf[3] == '*') WC->HaveExpressMessages = 1;
 390 }
 391
 392
 393
 394
 395 void output_static(char *what)
 396 {
 397         char buf[4096];
 398         FILE *fp;
 399         struct stat statbuf;
 400         off_t bytes;
 401         char *bigbuffer;
 402
 403         sprintf(buf, "static/%s", what);
 404         fp = fopen(buf, "rb");
 405         if (fp == NULL) {
 406                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 407                 wprintf("Content-Type: text/plain\n");
 408                 wprintf("\n");
 409                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 410         } else {
 411                 output_headers(0);
 412
 413                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 414                         wprintf("Content-type: image/gif\n");
 415                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 416                         wprintf("Content-type: text/plain\n");
 417                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 418                         wprintf("Content-type: image/jpeg\n");
 419                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 420                         wprintf("Content-type: text/html\n");
 421                 else
 422                         wprintf("Content-type: application/octet-stream\n");
 423
 424                 fstat(fileno(fp), &statbuf);
 425                 bytes = statbuf.st_size;
 426                 fprintf(stderr, "Static: %s, %ld bytes\n", what, bytes);
 427                 wprintf("Content-length: %ld\n", (long) bytes);
 428                 wprintf("\n");
 429                 bigbuffer = malloc(bytes);
 430                 fread(bigbuffer, bytes, 1, fp);
 431                 fclose(fp);
 432                 write(WC->http_sock, bigbuffer, bytes);
 433                 free(bigbuffer);
 434         }
 435         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 436                 end_webcit_session();
 437         }
 438 }
 439
 440 /*
 441  * When the browser requests an image file from the Citadel server,
 442  * this function is called to transmit it.
 443  */
 444 void output_image()
 445 {
 446         char buf[256];
 447         char xferbuf[4096];
 448         off_t bytes;
 449         off_t thisblock;
 450         off_t accomplished = 0L;
 451
 452
 453         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 454         serv_gets(buf);
 455         if (buf[0] == '2') {
 456                 bytes = extract_long(&buf[4], 0);
 457                 output_headers(0);
 458                 wprintf("Content-type: image/gif\n");
 459                 wprintf("Content-length: %ld\n", (long) bytes);
 460                 wprintf("\n");
 461
 462                 while (bytes > (off_t) 0) {
 463                         thisblock = (off_t) sizeof(xferbuf);
 464                         if (thisblock > bytes) {
 465                                 thisblock = bytes;
 466                         }
 467                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 468                         serv_gets(buf);
 469                         if (buf[0] == '6') {
 470                                 thisblock = extract_long(&buf[4], 0);
 471                                 serv_read(xferbuf, (int) thisblock);
 472                         }
 473                         else {
 474                                 memset(xferbuf, 0, thisblock);
 475                         }
 476                         write(WC->http_sock, xferbuf, thisblock);
 477                         bytes = bytes - thisblock;
 478                         accomplished = accomplished + thisblock;
 479                 }
 480                 serv_puts("CLOS");
 481                 serv_gets(buf);
 482         } else {
 483                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 484                 output_headers(0);
 485                 wprintf("Content-Type: text/plain\n");
 486                 wprintf("\n");
 487                 wprintf("Error retrieving image\n");
 488         }
 489
 490 }
 491
 492
 493 /*
 494  * Convenience functions to display a page containing only a string
 495  */
 496 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 497 {
 498         wprintf("HTTP/1.0 200 OK\n");
 499         output_headers(1);
 500         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
 501         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 502         wprintf("<B>%s</B>\n", titlebarmsg);
 503         wprintf("</FONT></TD></TR></TABLE><BR>\n");
 504         escputs(messagetext);
 505
 506         wprintf("<HR>\n");
 507         wDumpContent(1);
 508 }
 509
 510
 511 /*
 512  * Display a blank page.
 513  */
 514 void blank_page(void) {
 515         output_headers(7);
 516         wDumpContent(2);
 517 }
 518
 519
 520 void display_error(char *errormessage)
 521 {
 522         convenience_page("770000", "Error", errormessage);
 523 }
 524
 525 void display_success(char *successmessage)
 526 {
 527         convenience_page("007700", "OK", successmessage);
 528 }
 529
 530
 531
 532 void extract_action(char *actbuf, char *cmdbuf)
 533 {
 534         int i;
 535
 536         strcpy(actbuf, cmdbuf);
 537         if (!strncasecmp(actbuf, "GET /", 5))
 538                 strcpy(actbuf, &actbuf[5]);
 539         if (!strncasecmp(actbuf, "PUT /", 5))
 540                 strcpy(actbuf, &actbuf[5]);
 541         if (!strncasecmp(actbuf, "POST /", 6))
 542                 strcpy(actbuf, &actbuf[6]);
 543
 544         for (i = 0; i < strlen(actbuf); ++i) {
 545                 if (actbuf[i] == ' ') {
 546                         actbuf[i] = 0;
 547                         i = 0;
 548                 }
 549                 if (actbuf[i] == '/') {
 550                         actbuf[i] = 0;
 551                         i = 0;
 552                 }
 553                 if (actbuf[i] == '?') {
 554                         actbuf[i] = 0;
 555                         i = 0;
 556                 }
 557                 if (actbuf[i] == '&') {
 558                         actbuf[i] = 0;
 559                         i = 0;
 560                 }
 561         }
 562 }
 563
 564
 565 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 566                         void *content, char *cbtype, size_t length,
 567                         char *encoding, void *userdata)
 568 {
 569
 570         fprintf(stderr, "UPLOAD HANDLER CALLED\n");
 571         fprintf(stderr, "    name = %s\n", name);
 572         fprintf(stderr, "filename = %s\n", filename);
 573         fprintf(stderr, "encoding = %s\n", encoding);
 574         fprintf(stderr, "    type = %s\n", cbtype);
 575         fprintf(stderr, "  length = %ld\n", (long)length);
 576
 577         if (strlen(name) > 0) {
 578                 WC->upload = malloc(length);
 579                 if (WC->upload != NULL) {
 580                         WC->upload_length = length;
 581                         memcpy(WC->upload, content, length);
 582                 }
 583         }
 584 }
 585
 586
 587 /*
 588  * Entry point for WebCit transaction
 589  */
 590 void session_loop(struct httprequest *req)
 591 {
 592         char cmd[256];
 593         char action[256];
 594         char buf[256];
 595         int a, b;
 596         int ContentLength = 0;
 597         int BytesRead;
 598         char ContentType[512];
 599         char *content;
 600         char *content_end;
 601         struct httprequest *hptr;
 602         char browser_host[256];
 603         char user_agent[256];
 604
 605         /* We stuff these with the values coming from the client cookies,
 606          * so we can use them to reconnect a timed out session if we have to.
 607          */
 608         char c_host[256];
 609         char c_port[256];
 610         char c_username[256];
 611         char c_password[256];
 612         char c_roomname[256];
 613         char cookie[256];
 614
 615         strcpy(c_host, defaulthost);
 616         strcpy(c_port, defaultport);
 617         strcpy(c_username, "");
 618         strcpy(c_password, "");
 619         strcpy(c_roomname, "");
 620
 621         WC->upload_length = 0;
 622         WC->upload = NULL;
 623
 624         hptr = req;
 625         if (hptr == NULL) return;
 626
 627         strcpy(cmd, hptr->line);
 628         hptr = hptr->next;
 629         extract_action(action, cmd);
 630
 631         while (hptr != NULL) {
 632                 strcpy(buf, hptr->line);
 633                 hptr = hptr->next;
 634
 635                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 636                         strcpy(cookie, &buf[15]);
 637                         cookie_to_stuff(cookie, NULL,
 638                                       c_username, c_password, c_roomname);
 639                 }
 640                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 641                         ContentLength = atoi(&buf[16]);
 642                 }
 643                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 644                         strcpy(ContentType, &buf[14]);
 645                 }
 646                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 647                         strcpy(user_agent, &buf[12]);
 648                 }
 649         }
 650
 651         if (ContentLength > 0) {
 652                 fprintf(stderr, "Content length: %d\n", ContentLength);
 653                 content = malloc(ContentLength + 1);
 654                 memset(content, 0, ContentLength+1);
 655                 BytesRead = 0;
 656
 657                 while (BytesRead < ContentLength) {
 658                         a=read(WC->http_sock, &content[BytesRead],
 659                                 ContentLength - BytesRead);
 660                         if (a <= 0) BytesRead = ContentLength;
 661                         else BytesRead += a;
 662                 }
 663
 664                 if (!strncasecmp(ContentType,
 665                               "application/x-www-form-urlencoded", 33)) {
 666                         addurls(content);
 667                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 668                         content_end = content + ContentLength;
 669                         mime_parser(content, content_end, *upload_handler,
 670                                         NULL, NULL, NULL, 0);
 671                 }
 672         } else {
 673                 content = NULL;
 674         }
 675
 676         /* If there are variables in the URL, we must grab them now */
 677         for (a = 0; a < strlen(cmd); ++a)
 678                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 679                         for (b = a; b < strlen(cmd); ++b)
 680                                 if (isspace(cmd[b]))
 681                                         cmd[b] = 0;
 682                         addurls(&cmd[a + 1]);
 683                         cmd[a] = 0;
 684                 }
 685         /*
 686          * If we're not connected to a Citadel server, try to hook up the
 687          * connection now.  Preference is given to the host and port specified
 688          * by browser cookies, if cookies have been supplied.
 689          */
 690         if (!WC->connected) {
 691                 if (strlen(bstr("host")) > 0)
 692                         strcpy(c_host, bstr("host"));
 693                 if (strlen(bstr("port")) > 0)
 694                         strcpy(c_port, bstr("port"));
 695
 696                 if (!strcasecmp(c_host, "uds")) {
 697                         /* unix domain socket */
 698                         sprintf(buf, "%s/citadel.socket", c_port);
 699                         WC->serv_sock = uds_connectsock(buf);
 700                 }
 701                 else {
 702                         /* tcp socket */
 703                         WC->serv_sock = tcp_connectsock(c_host, c_port);
 704                 }
 705
 706                 if (WC->serv_sock < 0) {
 707                         do_logout();
 708                         goto SKIP_ALL_THIS_CRAP;
 709                 }
 710                 else {
 711                         WC->connected = 1;
 712                         serv_gets(buf); /* get the server welcome message */
 713                         locate_host(browser_host, WC->http_sock);
 714                         get_serv_info(browser_host, user_agent);
 715                 }
 716         }
 717
 718         check_for_express_messages();
 719
 720         /*
 721          * If we're not logged in, but we have username and password cookies
 722          * supplied by the browser, try using them to log in.
 723          */
 724         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 725                 serv_printf("USER %s", c_username);
 726                 serv_gets(buf);
 727                 if (buf[0] == '3') {
 728                         serv_printf("PASS %s", c_password);
 729                         serv_gets(buf);
 730                         if (buf[0] == '2') {
 731                                 become_logged_in(c_username, c_password, buf);
 732                         }
 733                 }
 734         }
 735         /*
 736          * If we don't have a current room, but a cookie specifying the
 737          * current room is supplied, make an effort to go there.
 738          */
 739         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 740                 serv_printf("GOTO %s", c_roomname);
 741                 serv_gets(buf);
 742                 if (buf[0] == '2') {
 743                         strcpy(WC->wc_roomname, c_roomname);
 744                 }
 745         }
 746         if (!strcasecmp(action, "static")) {
 747                 strcpy(buf, &cmd[12]);
 748                 for (a = 0; a < strlen(buf); ++a)
 749                         if (isspace(buf[a]))
 750                                 buf[a] = 0;
 751                 output_static(buf);
 752         } else if (!strcasecmp(action, "image")) {
 753                 output_image();
 754         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
 755                 do_login();
 756         } else if (!WC->logged_in) {
 757                 display_login(NULL);
 758         }
 759         /* Various commands... */
 760
 761         else if (!strcasecmp(action, "do_welcome")) {
 762                 do_welcome();
 763         } else if (!strcasecmp(action, "blank")) {
 764                 blank_page();
 765         } else if (!strcasecmp(action, "display_main_menu")) {
 766                 display_main_menu();
 767         } else if (!strcasecmp(action, "whobbs")) {
 768                 whobbs();
 769         } else if (!strcasecmp(action, "knrooms")) {
 770                 list_all_rooms_by_floor();
 771         } else if (!strcasecmp(action, "gotonext")) {
 772                 slrp_highest();
 773                 gotonext();
 774         } else if (!strcasecmp(action, "skip")) {
 775                 gotonext();
 776         } else if (!strcasecmp(action, "ungoto")) {
 777                 ungoto();
 778         } else if (!strcasecmp(action, "dotgoto")) {
 779                 slrp_highest();
 780                 smart_goto(bstr("room"));
 781         } else if (!strcasecmp(action, "termquit")) {
 782                 do_logout();
 783         } else if (!strcasecmp(action, "readnew")) {
 784                 readloop("readnew");
 785         } else if (!strcasecmp(action, "readold")) {
 786                 readloop("readold");
 787         } else if (!strcasecmp(action, "readfwd")) {
 788                 readloop("readfwd");
 789         } else if (!strcasecmp(action, "headers")) {
 790                 readloop("headers");
 791         } else if (!strcasecmp(action, "display_enter")) {
 792                 display_enter();
 793         } else if (!strcasecmp(action, "post")) {
 794                 post_message();
 795         } else if (!strcasecmp(action, "delete_msg")) {
 796                 delete_msg();
 797         } else if (!strcasecmp(action, "confirm_move_msg")) {
 798                 confirm_move_msg();
 799         } else if (!strcasecmp(action, "move_msg")) {
 800                 move_msg();
 801         } else if (!strcasecmp(action, "userlist")) {
 802                 userlist();
 803         } else if (!strcasecmp(action, "showuser")) {
 804                 showuser();
 805         } else if (!strcasecmp(action, "display_page")) {
 806                 display_page();
 807         } else if (!strcasecmp(action, "page_user")) {
 808                 page_user();
 809         } else if (!strcasecmp(action, "chat")) {
 810                 do_chat();
 811         } else if (!strcasecmp(action, "display_private")) {
 812                 display_private("", 0);
 813         } else if (!strcasecmp(action, "goto_private")) {
 814                 goto_private();
 815         } else if (!strcasecmp(action, "zapped_list")) {
 816                 zapped_list();
 817         } else if (!strcasecmp(action, "display_zap")) {
 818                 display_zap();
 819         } else if (!strcasecmp(action, "zap")) {
 820                 zap();
 821         } else if (!strcasecmp(action, "display_entroom")) {
 822                 display_entroom();
 823         } else if (!strcasecmp(action, "entroom")) {
 824                 entroom();
 825         } else if (!strcasecmp(action, "display_editroom")) {
 826                 display_editroom();
 827         } else if (!strcasecmp(action, "editroom")) {
 828                 editroom();
 829         } else if (!strcasecmp(action, "display_whok")) {
 830                 display_whok();
 831         } else if (!strcasecmp(action, "display_editinfo")) {
 832                 display_edit("Room info", "EINF 0", "RINF", "/editinfo");
 833         } else if (!strcasecmp(action, "editinfo")) {
 834                 save_edit("Room info", "EINF 1", 1);
 835         } else if (!strcasecmp(action, "display_editbio")) {
 836                 sprintf(buf, "RBIO %s", WC->wc_username);
 837                 display_edit("Your bio", "NOOP", buf, "editbio");
 838         } else if (!strcasecmp(action, "editbio")) {
 839                 save_edit("Your bio", "EBIO", 0);
 840         } else if (!strcasecmp(action, "confirm_delete_room")) {
 841                 confirm_delete_room();
 842         } else if (!strcasecmp(action, "delete_room")) {
 843                 delete_room();
 844         } else if (!strcasecmp(action, "validate")) {
 845                 validate();
 846         } else if (!strcasecmp(action, "display_editpic")) {
 847                 display_graphics_upload("your photo",
 848                                         "UIMG 0|_userpic_",
 849                                         "/editpic");
 850         } else if (!strcasecmp(action, "editpic")) {
 851                 do_graphics_upload("UIMG 1|_userpic_");
 852         } else if (!strcasecmp(action, "display_editroompic")) {
 853                 display_graphics_upload("the graphic for this room",
 854                                         "UIMG 0|_roompic_",
 855                                         "/editroompic");
 856         } else if (!strcasecmp(action, "editroompic")) {
 857                 do_graphics_upload("UIMG 1|_roompic_");
 858         } else if (!strcasecmp(action, "select_floor_to_edit_pic")) {
 859                 select_floor_to_edit_pic();
 860         } else if (!strcasecmp(action, "display_editfloorpic")) {
 861                 sprintf(buf, "UIMG 0|_floorpic_|%s",
 862                         bstr("which_floor"));
 863                 display_graphics_upload("the graphic for this floor",
 864                                         buf,
 865                                         "/editfloorpic");
 866         } else if (!strcasecmp(action, "editfloorpic")) {
 867                 sprintf(buf, "UIMG 1|_floorpic_|%s",
 868                         bstr("which_floor"));
 869                 do_graphics_upload(buf);
 870         } else if (!strcasecmp(action, "display_reg")) {
 871                 display_reg(0);
 872         } else if (!strcasecmp(action, "register")) {
 873                 register_user();
 874         } else if (!strcasecmp(action, "display_changepw")) {
 875                 display_changepw();
 876         } else if (!strcasecmp(action, "changepw")) {
 877                 changepw();
 878         } else if (!strcasecmp(action, "display_edit_node")) {
 879                 display_edit_node();
 880         } else if (!strcasecmp(action, "display_netconf")) {
 881                 display_netconf();
 882         } else if (!strcasecmp(action, "display_confirm_unshare")) {
 883                 display_confirm_unshare();
 884         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
 885                 display_confirm_delete_node();
 886         } else if (!strcasecmp(action, "delete_node")) {
 887                 delete_node();
 888         } else if (!strcasecmp(action, "unshare")) {
 889                 unshare();
 890         } else if (!strcasecmp(action, "display_add_node")) {
 891                 display_add_node();
 892         } else if (!strcasecmp(action, "add_node")) {
 893                 add_node();
 894         } else if (!strcasecmp(action, "display_share")) {
 895                 display_share();
 896         } else if (!strcasecmp(action, "share")) {
 897                 share();
 898         } else if (!strcasecmp(action, "terminate_session")) {
 899                 slrp_highest();
 900                 terminate_session();
 901         } else if (!strcasecmp(action, "edit_me")) {
 902                 edit_me();
 903         } else if (!strcasecmp(action, "display_siteconfig")) {
 904                 display_siteconfig();
 905         } else if (!strcasecmp(action, "page_popup")) {
 906                 page_popup();
 907         } else if (!strcasecmp(action, "siteconfig")) {
 908                 siteconfig();
 909         } else if (!strcasecmp(action, "display_generic")) {
 910                 display_generic();
 911         } else if (!strcasecmp(action, "do_generic")) {
 912                 do_generic();
 913         } else if (!strcasecmp(action, "display_menubar")) {
 914                 display_menubar(1);
 915         } else if (!strcasecmp(action, "diagnostics")) {
 916                 output_headers(1);
 917
 918                 wprintf("You're in session %d<HR>\n", WC->wc_session);
 919                 wprintf("Command: <BR><PRE>\n");
 920                 escputs(cmd);
 921                 wprintf("</PRE><HR>\n");
 922                 wprintf("Variables: <BR><PRE>\n");
 923                 dump_vars();
 924                 wprintf("</PRE><HR>\n");
 925                 wDumpContent(1);
 926         }
 927         /* When all else fais, display the main menu. */
 928         else {
 929                 display_main_menu();
 930         }
 931
 932 SKIP_ALL_THIS_CRAP:
 933         fflush(stdout);
 934         if (content != NULL) {
 935                 free(content);
 936                 content = NULL;
 937         }
 938         free_urls();
 939         if (WC->upload_length > 0) {
 940                 free(WC->upload);
 941                 WC->upload_length = 0;
 942         }
 943 }