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 <stdlib.h>
  12 #ifdef HAVE_UNISTD_H
  13 #include <unistd.h>
  14 #endif
  15 #include <stdio.h>
  16 #include <ctype.h>
  17 #include <string.h>
  18 #include <errno.h>
  19 #include <sys/stat.h>
  20 #include <stdarg.h>
  21 #include "webcit.h"
  22 #include "child.h"
  23 #include "mime_parser.h"
  24
  25 int wc_session;
  26 char wc_username[256];
  27 char wc_password[256];
  28 char wc_roomname[256];
  29 int TransactionCount = 0;
  30 int connected = 0;
  31 int logged_in = 0;
  32 int axlevel;
  33 char *ExpressMessages = NULL;
  34 int new_mail = 0;
  35 int need_vali = 0;
  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 webcontent *wlist = NULL;
  43 struct webcontent *wlast = NULL;
  44
  45 struct urlcontent *urlstrings = NULL;
  46
  47 static const char *defaulthost = DEFAULT_HOST;
  48 static const char *defaultport = DEFAULT_PORT;
  49
  50 int upload_length = 0;
  51 char *upload;
  52
  53
  54 void unescape_input(char *buf)
  55 {
  56         int a, b;
  57         char hex[3];
  58
  59         while ((isspace(buf[strlen(buf) - 1])) && (strlen(buf) > 0))
  60                 buf[strlen(buf) - 1] = 0;
  61
  62         for (a = 0; a < strlen(buf); ++a) {
  63                 if (buf[a] == '+')
  64                         buf[a] = ' ';
  65                 if (buf[a] == '%') {
  66                         hex[0] = buf[a + 1];
  67                         hex[1] = buf[a + 2];
  68                         hex[2] = 0;
  69                         sscanf(hex, "%02x", &b);
  70                         buf[a] = (char) b;
  71                         strcpy(&buf[a + 1], &buf[a + 3]);
  72                 }
  73         }
  74
  75 }
  76
  77
  78 void addurls(char *url)
  79 {
  80         char *up, *ptr;
  81         char buf[256];
  82         int a, b;
  83         struct urlcontent *u;
  84
  85         up = url;
  86         while (strlen(up) > 0) {
  87
  88                 /* locate the = sign */
  89                 strncpy(buf, up, 255);
  90                 b = (-1);
  91                 for (a = 255; a >= 0; --a)
  92                         if (buf[a] == '=')
  93                                 b = a;
  94                 if (b < 0)
  95                         return;
  96                 buf[b] = 0;
  97
  98                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
  99                 u->next = urlstrings;
 100                 urlstrings = u;
 101                 strcpy(u->url_key, buf);
 102
 103                 /* now chop that part off */
 104                 for (a = 0; a <= b; ++a)
 105                         ++up;
 106
 107                 /* locate the & sign */
 108                 ptr = up;
 109                 b = strlen(up);
 110                 for (a = 0; a < strlen(up); ++a) {
 111                         if (!strncmp(ptr, "&", 1)) {
 112                                 b = a;
 113                                 break;
 114                         }
 115                         ++ptr;
 116                 }
 117                 ptr = up;
 118                 for (a = 0; a < b; ++a)
 119                         ++ptr;
 120                 strcpy(ptr, "");
 121
 122                 u->url_data = malloc(strlen(up) + 1);
 123                 strcpy(u->url_data, up);
 124                 u->url_data[b] = 0;
 125                 unescape_input(u->url_data);
 126                 up = ptr;
 127                 ++up;
 128         }
 129 }
 130
 131 void free_urls(void)
 132 {
 133         struct urlcontent *u;
 134
 135         while (urlstrings != NULL) {
 136                 free(urlstrings->url_data);
 137                 u = urlstrings->next;
 138                 free(urlstrings);
 139                 urlstrings = u;
 140         }
 141 }
 142
 143 /*
 144  * Diagnostic function to display the contents of all variables
 145  */
 146 void dump_vars(void)
 147 {
 148         struct urlcontent *u;
 149
 150         for (u = urlstrings; u != NULL; u = u->next) {
 151                 wprintf("%38s = %s\n", u->url_key, u->url_data);
 152         }
 153 }
 154
 155 char *bstr(char *key)
 156 {
 157         struct urlcontent *u;
 158
 159         for (u = urlstrings; u != NULL; u = u->next) {
 160                 if (!strcasecmp(u->url_key, key))
 161                         return (u->url_data);
 162         }
 163         return ("");
 164 }
 165
 166
 167 void wprintf(const char *format,...)
 168 {
 169         va_list arg_ptr;
 170         struct webcontent *wptr;
 171
 172         wptr = (struct webcontent *) malloc(sizeof(struct webcontent));
 173         wptr->next = NULL;
 174         if (wlist == NULL) {
 175                 wlist = wptr;
 176                 wlast = wptr;
 177         } else {
 178                 wlast->next = wptr;
 179                 wlast = wptr;
 180         }
 181
 182         va_start(arg_ptr, format);
 183         vsprintf(wptr->w_data, format, arg_ptr);
 184         va_end(arg_ptr);
 185 }
 186
 187 int wContentLength(void)
 188 {
 189         struct webcontent *wptr;
 190         int len = 0;
 191
 192         for (wptr = wlist; wptr != NULL; wptr = wptr->next) {
 193                 len = len + strlen(wptr->w_data);
 194         }
 195
 196         return (len);
 197 }
 198
 199 /*
 200  * wDumpContent() takes all the stuff that's been queued up using
 201  * the wprintf() and escputs() functions, and sends it out to the browser.
 202  * By queuing instead of transmitting as it's generated, we're able to
 203  * calculate a Content-length: header.
 204  *
 205  * print_standard_html_footer should be set to 0 to transmit only, 1 to
 206  * append the main menu and closing tags, or 2 to
 207  * append the closing tags only.
 208  */
 209 void wDumpContent(int print_standard_html_footer)
 210 {
 211         struct webcontent *wptr;
 212
 213         if (fake_frames) {
 214                 wprintf("<CENTER><FONT SIZE=-1>"
 215                         "<TABLE border=0 width=100%><TR>"
 216                         "<TD><A HREF=\"/ungoto\">"
 217                         "<IMG SRC=\"/static/back.gif\" BORDER=0>"
 218                         "Ungoto</A></TD>");
 219                 wprintf("<TD><A HREF=\"#TheTop\">"
 220                         "<IMG SRC=\"/static/up.gif\" BORDER=0>"
 221                         "Top of page</A></TD>");
 222                 wprintf("<TD><A HREF=\"/display_enter\">"
 223                         "<IMG SRC=\"/static/enter.gif\" BORDER=0>"
 224                         "Enter a message</A></TD>");
 225                 wprintf("<TD><A HREF=\"/gotonext\">"
 226                         "Goto next room"
 227                         "<IMG SRC=\"/static/forward.gif\" BORDER=0></A></TD>"
 228                         "</TR></TABLE>"
 229                         "</FONT>\n"
 230                         "</TD></TR></TABLE></TABLE>\n");
 231                 fake_frames = 0;
 232         }
 233
 234         if (print_standard_html_footer) {
 235                 if (print_standard_html_footer != 2) {
 236                         wprintf("<BR>");
 237                 }
 238                 wprintf("</BODY></HTML>\n");
 239         }
 240         printf("Content-type: text/html\n");
 241         printf("Content-length: %d\n", wContentLength());
 242         printf("\n");
 243
 244         while (wlist != NULL) {
 245                 fwrite(wlist->w_data, strlen(wlist->w_data), 1, stdout);
 246                 wptr = wlist->next;
 247                 free(wlist);
 248                 wlist = wptr;
 249         }
 250         wlast = NULL;
 251 }
 252
 253
 254 void escputs1(char *strbuf, int nbsp)
 255 {
 256         int a;
 257
 258         for (a = 0; a < strlen(strbuf); ++a) {
 259                 if (strbuf[a] == '<')
 260                         wprintf("&lt;");
 261                 else if (strbuf[a] == '>')
 262                         wprintf("&gt;");
 263                 else if (strbuf[a] == '&')
 264                         wprintf("&amp;");
 265                 else if (strbuf[a] == '\"')
 266                         wprintf("&quot;");
 267                 else if (strbuf[a] == '\'')
 268                         wprintf("&#39;");
 269                 else if (strbuf[a] == LB)
 270                         wprintf("<");
 271                 else if (strbuf[a] == RB)
 272                         wprintf(">");
 273                 else if (strbuf[a] == QU)
 274                         wprintf("\"");
 275                 else if ((strbuf[a] == 32) && (nbsp == 1)) {
 276                         wprintf("&nbsp;");
 277                 } else {
 278                         wprintf("%c", strbuf[a]);
 279                 }
 280         }
 281 }
 282
 283 void escputs(char *strbuf)
 284 {
 285         escputs1(strbuf, 0);
 286 }
 287
 288
 289
 290 char *urlesc(char *strbuf)
 291 {
 292         int a, b, c;
 293         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 294         static char outbuf[512];
 295
 296         strcpy(outbuf, "");
 297
 298         for (a = 0; a < strlen(strbuf); ++a) {
 299                 c = 0;
 300                 for (b = 0; b < strlen(ec); ++b) {
 301                         if (strbuf[a] == ec[b])
 302                                 c = 1;
 303                 }
 304                 b = strlen(outbuf);
 305                 if (c == 1)
 306                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 307                 else
 308                         sprintf(&outbuf[b], "%c", strbuf[a]);
 309         }
 310         return (outbuf);
 311 }
 312
 313 void urlescputs(char *strbuf)
 314 {
 315         wprintf("%s", urlesc(strbuf));
 316 }
 317
 318
 319
 320
 321 /*
 322  * Get a line of text from the webserver (which originally came from the
 323  * user's browser), checking for sanity etc.
 324  */
 325 char *getz(char *buf)
 326 {
 327         int e = 0;
 328
 329         bzero(buf, 256);
 330
 331         /* If fgets() fails, it's because the webserver crashed, so kill off
 332          * the session too.
 333          */
 334         if (fgets(buf, 256, stdin) == NULL) {
 335                 e = errno;
 336                 fprintf(stderr, "webcit: exit code %d (%s)\n",
 337                         e, strerror(e));
 338                 fflush(stderr);
 339                 exit(e);
 340
 341         /* Otherwise, strip out nonprintables and resume our happy day.
 342          */
 343         } else {
 344                 while ((strlen(buf) > 0) && (!isprint(buf[strlen(buf) - 1])))
 345                         buf[strlen(buf) - 1] = 0;
 346                 return buf;
 347         }
 348 }
 349
 350
 351
 352 /*
 353  * Output all that important stuff that the browser will want to see
 354  *
 355  * print_standard_html_head values:
 356  * 0 = Nothing.  Do not display any leading HTTP or HTML.
 357  * 1 = HTTP headers plus the "fake frames" found in most windows.
 358  * 2 = HTTP headers required to terminate the session (unset cookies)
 359  * 3 = HTTP headers only.
 360  */
 361 void output_headers(int print_standard_html_head)
 362 {
 363
 364         static char *unset = "; expires=28-May-1971 18:10:00 GMT";
 365         char cookie[256];
 366
 367         printf("Server: %s\n", SERVER);
 368         printf("Connection: close\n");
 369
 370         if (print_standard_html_head > 0) {
 371                 printf("Pragma: no-cache\n");
 372                 printf("Cache-Control: no-store\n");
 373         }
 374         stuff_to_cookie(cookie, wc_session, wc_username,
 375                         wc_password, wc_roomname);
 376         if (print_standard_html_head == 2) {
 377                 printf("X-WebCit-Session: close\n");
 378                 printf("Set-cookie: webcit=%s\n", unset);
 379         } else {
 380                 printf("Set-cookie: webcit=%s\n", cookie);
 381         }
 382
 383         if (print_standard_html_head > 0) {
 384                 wprintf("<HTML><HEAD><TITLE>");
 385                 escputs(serv_info.serv_humannode);
 386                 wprintf("</TITLE>\n"
 387                         "<META HTTP-EQUIV=\"Pragma\" CONTENT=\"no-cache\">\n"
 388                         "</HEAD>\n");
 389                 if (ExpressMessages != NULL) {
 390                         wprintf("<SCRIPT language=\"javascript\">\n");
 391                         wprintf("function ExpressMessage() {\n");
 392                         wprintf(" alert(\"");
 393                         escputs(ExpressMessages);
 394                         wprintf("\")\n");
 395                         wprintf(" }\n </SCRIPT>\n");
 396                 }
 397
 398
 399
 400                 /* JavaScript key-based navigation would go here if it
 401                  * were finished
 402                  */
 403
 404                 wprintf("<BODY ");
 405                 if (ExpressMessages != NULL) {
 406                         wprintf("onload=\"ExpressMessage()\" ");
 407                         free(ExpressMessages);
 408                         ExpressMessages = NULL;
 409                 }
 410                 wprintf("BACKGROUND=\"/image&name=background\" TEXT=\"#000000\" LINK=\"#004400\">\n");
 411
 412
 413         if (print_standard_html_head == 1) {
 414                 wprintf("<A NAME=\"TheTop\"></A>"
 415                         "<TABLE border=0 width=100%>"
 416                         "<TR VALIGN=TOP><TD>");
 417
 418                 display_menubar(0);
 419
 420                 wprintf("</TD><TD VALIGN=TOP>"
 421                         "<TABLE border=0 width=100%><TR VALIGN=TOP>"
 422                         "<TD>\n");
 423
 424                 embed_room_banner(NULL);
 425
 426                 wprintf("</TD></TR><TR VALIGN=TOP><TD>\n");
 427
 428                 fake_frames = 1;
 429                 }
 430         }
 431 }
 432
 433
 434
 435 void ExpressMessageCat(char *buf) {
 436         if (ExpressMessages == NULL) {
 437                 ExpressMessages = malloc(strlen(buf) + 4);
 438                 strcpy(ExpressMessages, "");
 439         } else {
 440                 ExpressMessages = realloc(ExpressMessages,
 441                         (strlen(ExpressMessages) + strlen(buf) + 4));
 442         }
 443         strcat(ExpressMessages, buf);
 444         strcat(ExpressMessages, "\\n");
 445 }
 446
 447
 448 void check_for_express_messages()
 449 {
 450         char buf[256];
 451
 452         serv_puts("PEXP");
 453         serv_gets(buf);
 454         if (buf[0] == '1') {
 455                 while (serv_gets(buf), strcmp(buf, "000")) {
 456                         ExpressMessageCat(buf);
 457                 }
 458         }
 459 }
 460
 461
 462
 463
 464 void output_static(char *what)
 465 {
 466         char buf[256];
 467         FILE *fp;
 468         struct stat statbuf;
 469         off_t bytes;
 470
 471         sprintf(buf, "static/%s", what);
 472         fp = fopen(buf, "rb");
 473         if (fp == NULL) {
 474                 printf("HTTP/1.0 404 %s\n", strerror(errno));
 475                 output_headers(0);
 476                 printf("Content-Type: text/plain\n");
 477                 sprintf(buf, "%s: %s\n", what, strerror(errno));
 478                 printf("Content-length: %d\n", strlen(buf));
 479                 printf("\n");
 480                 fwrite(buf, strlen(buf), 1, stdout);
 481         } else {
 482                 printf("HTTP/1.0 200 OK\n");
 483                 output_headers(0);
 484
 485                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 486                         printf("Content-type: image/gif\n");
 487                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 488                         printf("Content-type: text/plain\n");
 489                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 490                         printf("Content-type: image/jpeg\n");
 491                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 492                         printf("Content-type: text/html\n");
 493                 else
 494                         printf("Content-type: application/octet-stream\n");
 495
 496                 fstat(fileno(fp), &statbuf);
 497                 bytes = statbuf.st_size;
 498                 printf("Content-length: %ld\n", (long) bytes);
 499                 printf("\n");
 500                 while (bytes--) {
 501                         putc(getc(fp), stdout);
 502                 }
 503                 fflush(stdout);
 504                 fclose(fp);
 505         }
 506 }
 507
 508 void output_image()
 509 {
 510         char buf[256];
 511         char xferbuf[4096];
 512         off_t bytes;
 513         off_t thisblock;
 514         off_t accomplished = 0L;
 515
 516
 517         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 518         serv_gets(buf);
 519         if (buf[0] == '2') {
 520                 bytes = extract_long(&buf[4], 0);
 521                 printf("HTTP/1.0 200 OK\n");
 522                 output_headers(0);
 523                 printf("Content-type: image/gif\n");
 524                 printf("Content-length: %ld\n", (long) bytes);
 525                 printf("\n");
 526
 527                 while (bytes > (off_t) 0) {
 528                         thisblock = (off_t) sizeof(xferbuf);
 529                         if (thisblock > bytes)
 530                                 thisblock = bytes;
 531                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 532                         serv_gets(buf);
 533                         if (buf[0] == '6')
 534                                 thisblock = extract_long(&buf[4], 0);
 535                         serv_read(xferbuf, (int) thisblock);
 536                         fwrite(xferbuf, thisblock, 1, stdout);
 537                         bytes = bytes - thisblock;
 538                         accomplished = accomplished + thisblock;
 539                 }
 540                 fflush(stdout);
 541                 serv_puts("CLOS");
 542                 serv_gets(buf);
 543         } else {
 544                 printf("HTTP/1.0 404 %s\n", strerror(errno));
 545                 output_headers(0);
 546                 printf("Content-Type: text/plain\n");
 547                 sprintf(buf, "Error retrieving image\n");
 548                 printf("Content-length: %d\n", strlen(buf));
 549                 printf("\n");
 550                 fwrite(buf, strlen(buf), 1, stdout);
 551         }
 552
 553 }
 554
 555
 556 /*
 557  * Convenience functions to display a page containing only a string
 558  */
 559 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 560 {
 561         printf("HTTP/1.0 200 OK\n");
 562         output_headers(1);
 563         wprintf("<TABLE WIDTH=100% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
 564         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 565         wprintf("<B>%s</B>\n", titlebarmsg);
 566         wprintf("</FONT></TD></TR></TABLE><BR>\n");
 567         escputs(messagetext);
 568
 569         wprintf("<HR>\n");
 570         embed_main_menu();
 571         wDumpContent(1);
 572 }
 573
 574 void display_error(char *errormessage)
 575 {
 576         convenience_page("770000", "Error", errormessage);
 577 }
 578
 579 void display_success(char *successmessage)
 580 {
 581         convenience_page("007700", "OK", successmessage);
 582 }
 583
 584
 585
 586 void extract_action(char *actbuf, char *cmdbuf)
 587 {
 588         int i;
 589
 590         strcpy(actbuf, cmdbuf);
 591         if (!strncasecmp(actbuf, "GET /", 5))
 592                 strcpy(actbuf, &actbuf[5]);
 593         if (!strncasecmp(actbuf, "PUT /", 5))
 594                 strcpy(actbuf, &actbuf[5]);
 595         if (!strncasecmp(actbuf, "POST /", 6))
 596                 strcpy(actbuf, &actbuf[6]);
 597
 598         for (i = 0; i < strlen(actbuf); ++i) {
 599                 if (actbuf[i] == ' ') {
 600                         actbuf[i] = 0;
 601                         i = 0;
 602                 }
 603                 if (actbuf[i] == '/') {
 604                         actbuf[i] = 0;
 605                         i = 0;
 606                 }
 607                 if (actbuf[i] == '?') {
 608                         actbuf[i] = 0;
 609                         i = 0;
 610                 }
 611                 if (actbuf[i] == '&') {
 612                         actbuf[i] = 0;
 613                         i = 0;
 614                 }
 615         }
 616 }
 617
 618
 619 void upload_handler(char *name, char *filename, char *encoding,
 620                     void *content, char *cbtype, size_t length)
 621 {
 622
 623         fprintf(stderr, "UPLOAD HANDLER CALLED\n");
 624         fprintf(stderr, "    name = %s\n", name);
 625         fprintf(stderr, "filename = %s\n", filename);
 626         fprintf(stderr, "encoding = %s\n", encoding);
 627         fprintf(stderr, "    type = %s\n", cbtype);
 628         fprintf(stderr, "  length = %d\n", length);
 629
 630         if (strlen(name) > 0) {
 631                 upload = malloc(length);
 632                 if (upload != NULL) {
 633                         upload_length = length;
 634                         memcpy(upload, content, length);
 635                 }
 636         }
 637 }
 638
 639
 640 void session_loop(char *browser_host, char *user_agent)
 641 {
 642         char cmd[256];
 643         char action[256];
 644         char buf[256];
 645         int a, b;
 646         int ContentLength = 0;
 647         char ContentType[512];
 648         char *content;
 649
 650         /* We stuff these with the values coming from the client cookies,
 651          * so we can use them to reconnect a timed out session if we have to.
 652          */
 653         char c_host[256];
 654         char c_port[256];
 655         char c_username[256];
 656         char c_password[256];
 657         char c_roomname[256];
 658         char cookie[256];
 659
 660         strcpy(c_host, defaulthost);
 661         strcpy(c_port, defaultport);
 662         strcpy(c_username, "");
 663         strcpy(c_password, "");
 664         strcpy(c_roomname, "");
 665
 666         upload_length = 0;
 667         upload = NULL;
 668
 669         if (getz(cmd) == NULL)
 670                 return;
 671         extract_action(action, cmd);
 672
 673         do {
 674                 if (getz(buf) == NULL)
 675                         return;
 676
 677                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 678                         strcpy(cookie, &buf[15]);
 679                         cookie_to_stuff(cookie, NULL,
 680                                       c_username, c_password, c_roomname);
 681                 }
 682                 if (!strncasecmp(buf, "Content-length: ", 16)) {
 683                         ContentLength = atoi(&buf[16]);
 684                 }
 685                 if (!strncasecmp(buf, "Content-type: ", 14)) {
 686                         strcpy(ContentType, &buf[14]);
 687                 }
 688         } while (strlen(buf) > 0);
 689
 690         ++TransactionCount;
 691
 692         if (ContentLength > 0) {
 693                 content = malloc(ContentLength + 1);
 694                 fread(content, ContentLength, 1, stdin);
 695
 696                 content[ContentLength] = 0;
 697
 698                 if (!strncasecmp(ContentType,
 699                               "application/x-www-form-urlencoded", 33)) {
 700                         addurls(content);
 701                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 702                         mime_parser(content, ContentLength, ContentType,
 703                                     *upload_handler);
 704                 }
 705         } else {
 706                 content = NULL;
 707         }
 708
 709         /* If there are variables in the URL, we must grab them now */
 710         for (a = 0; a < strlen(cmd); ++a)
 711                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 712                         for (b = a; b < strlen(cmd); ++b)
 713                                 if (isspace(cmd[b]))
 714                                         cmd[b] = 0;
 715                         addurls(&cmd[a + 1]);
 716                         cmd[a] = 0;
 717                 }
 718         /*
 719          * If we're not connected to a Citadel server, try to hook up the
 720          * connection now.  Preference is given to the host and port specified
 721          * by browser cookies, if cookies have been supplied.
 722          */
 723         if (!connected) {
 724                 if (strlen(bstr("host")) > 0)
 725                         strcpy(c_host, bstr("host"));
 726                 if (strlen(bstr("port")) > 0)
 727                         strcpy(c_port, bstr("port"));
 728                 serv_sock = connectsock(c_host, c_port, "tcp");
 729                 if (serv_sock < 0) {
 730                         do_logout();
 731                 }
 732
 733                 connected = 1;
 734                 serv_gets(buf); /* get the server welcome message */
 735                 get_serv_info(browser_host, user_agent);
 736         }
 737         check_for_express_messages();
 738
 739         /*
 740          * If we're not logged in, but we have username and password cookies
 741          * supplied by the browser, try using them to log in.
 742          */
 743         if ((!logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 744                 serv_printf("USER %s", c_username);
 745                 serv_gets(buf);
 746                 if (buf[0] == '3') {
 747                         serv_printf("PASS %s", c_password);
 748                         serv_gets(buf);
 749                         if (buf[0] == '2') {
 750                                 become_logged_in(c_username, c_password, buf);
 751                         }
 752                 }
 753         }
 754         /*
 755          * If we don't have a current room, but a cookie specifying the
 756          * current room is supplied, make an effort to go there.
 757          */
 758         if ((strlen(wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 759                 serv_printf("GOTO %s", c_roomname);
 760                 serv_gets(buf);
 761                 if (buf[0] == '2') {
 762                         strcpy(wc_roomname, c_roomname);
 763                 }
 764         }
 765         if (!strcasecmp(action, "static")) {
 766                 strcpy(buf, &cmd[12]);
 767                 for (a = 0; a < strlen(buf); ++a)
 768                         if (isspace(buf[a]))
 769                                 buf[a] = 0;
 770                 output_static(buf);
 771         } else if (!strcasecmp(action, "image")) {
 772                 output_image();
 773         } else if ((!logged_in) && (!strcasecmp(action, "login"))) {
 774                 do_login();
 775         } else if (!logged_in) {
 776                 display_login(NULL);
 777         }
 778         /* Various commands... */
 779
 780         else if (!strcasecmp(action, "do_welcome")) {
 781                 do_welcome();
 782         } else if (!strcasecmp(action, "display_main_menu")) {
 783                 display_main_menu();
 784         } else if (!strcasecmp(action, "advanced")) {
 785                 display_advanced_menu();
 786         } else if (!strcasecmp(action, "whobbs")) {
 787                 whobbs();
 788         } else if (!strcasecmp(action, "knrooms")) {
 789                 list_all_rooms_by_floor();
 790         } else if (!strcasecmp(action, "gotonext")) {
 791                 slrp_highest();
 792                 gotonext();
 793         } else if (!strcasecmp(action, "skip")) {
 794                 gotonext();
 795         } else if (!strcasecmp(action, "ungoto")) {
 796                 ungoto();
 797         } else if (!strcasecmp(action, "dotgoto")) {
 798                 slrp_highest();
 799                 smart_goto(bstr("room"));
 800         } else if (!strcasecmp(action, "termquit")) {
 801                 do_logout();
 802         } else if (!strcasecmp(action, "readnew")) {
 803                 readloop("readnew");
 804         } else if (!strcasecmp(action, "readold")) {
 805                 readloop("readold");
 806         } else if (!strcasecmp(action, "readfwd")) {
 807                 readloop("readfwd");
 808         } else if (!strcasecmp(action, "display_enter")) {
 809                 display_enter();
 810         } else if (!strcasecmp(action, "post")) {
 811                 post_message();
 812         } else if (!strcasecmp(action, "confirm_delete_msg")) {
 813                 confirm_delete_msg();
 814         } else if (!strcasecmp(action, "delete_msg")) {
 815                 delete_msg();
 816         } else if (!strcasecmp(action, "confirm_move_msg")) {
 817                 confirm_move_msg();
 818         } else if (!strcasecmp(action, "move_msg")) {
 819                 move_msg();
 820         } else if (!strcasecmp(action, "userlist")) {
 821                 userlist();
 822         } else if (!strcasecmp(action, "showuser")) {
 823                 showuser();
 824         } else if (!strcasecmp(action, "display_page")) {
 825                 display_page();
 826         } else if (!strcasecmp(action, "page_user")) {
 827                 page_user();
 828         } else if (!strcasecmp(action, "chat")) {
 829                 do_chat();
 830         } else if (!strcasecmp(action, "display_private")) {
 831                 display_private("", 0);
 832         } else if (!strcasecmp(action, "goto_private")) {
 833                 goto_private();
 834         } else if (!strcasecmp(action, "zapped_list")) {
 835                 zapped_list();
 836         } else if (!strcasecmp(action, "display_zap")) {
 837                 display_zap();
 838         } else if (!strcasecmp(action, "zap")) {
 839                 zap();
 840         } else if (!strcasecmp(action, "display_entroom")) {
 841                 display_entroom();
 842         } else if (!strcasecmp(action, "entroom")) {
 843                 entroom();
 844         } else if (!strcasecmp(action, "display_editroom")) {
 845                 display_editroom();
 846         } else if (!strcasecmp(action, "editroom")) {
 847                 editroom();
 848         } else if (!strcasecmp(action, "display_editinfo")) {
 849                 display_edit("Room info", "EINF 0", "RINF", "/editinfo");
 850         } else if (!strcasecmp(action, "editinfo")) {
 851                 save_edit("Room info", "EINF 1", 1);
 852         } else if (!strcasecmp(action, "display_editbio")) {
 853                 sprintf(buf, "RBIO %s", wc_username);
 854                 display_edit("Your bio", "NOOP", buf, "editbio");
 855         } else if (!strcasecmp(action, "editbio")) {
 856                 save_edit("Your bio", "EBIO", 0);
 857         } else if (!strcasecmp(action, "confirm_delete_room")) {
 858                 confirm_delete_room();
 859         } else if (!strcasecmp(action, "delete_room")) {
 860                 delete_room();
 861         } else if (!strcasecmp(action, "validate")) {
 862                 validate();
 863         } else if (!strcasecmp(action, "display_editpic")) {
 864                 display_graphics_upload("your photo",
 865                                         "UIMG 0|_userpic_",
 866                                         "/editpic");
 867         } else if (!strcasecmp(action, "editpic")) {
 868                 do_graphics_upload("UIMG 1|_userpic_");
 869         } else if (!strcasecmp(action, "display_editroompic")) {
 870                 display_graphics_upload("the graphic for this room",
 871                                         "UIMG 0|_roompic_",
 872                                         "/editroompic");
 873         } else if (!strcasecmp(action, "editroompic")) {
 874                 do_graphics_upload("UIMG 1|_roompic_");
 875         } else if (!strcasecmp(action, "select_floor_to_edit_pic")) {
 876                 select_floor_to_edit_pic();
 877         } else if (!strcasecmp(action, "display_editfloorpic")) {
 878                 sprintf(buf, "UIMG 0|_floorpic_|%s",
 879                         bstr("which_floor"));
 880                 display_graphics_upload("the graphic for this floor",
 881                                         buf,
 882                                         "/editfloorpic");
 883         } else if (!strcasecmp(action, "editfloorpic")) {
 884                 sprintf(buf, "UIMG 1|_floorpic_|%s",
 885                         bstr("which_floor"));
 886                 do_graphics_upload(buf);
 887         } else if (!strcasecmp(action, "display_reg")) {
 888                 display_reg(0);
 889         } else if (!strcasecmp(action, "register")) {
 890                 register_user();
 891         } else if (!strcasecmp(action, "display_changepw")) {
 892                 display_changepw();
 893         } else if (!strcasecmp(action, "changepw")) {
 894                 changepw();
 895         } else if (!strcasecmp(action, "display_edit_node")) {
 896                 display_edit_node();
 897         } else if (!strcasecmp(action, "display_netconf")) {
 898                 display_netconf();
 899         } else if (!strcasecmp(action, "display_confirm_unshare")) {
 900                 display_confirm_unshare();
 901         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
 902                 display_confirm_delete_node();
 903         } else if (!strcasecmp(action, "delete_node")) {
 904                 delete_node();
 905         } else if (!strcasecmp(action, "unshare")) {
 906                 unshare();
 907         } else if (!strcasecmp(action, "display_add_node")) {
 908                 display_add_node();
 909         } else if (!strcasecmp(action, "add_node")) {
 910                 add_node();
 911         } else if (!strcasecmp(action, "display_share")) {
 912                 display_share();
 913         } else if (!strcasecmp(action, "share")) {
 914                 share();
 915         } else if (!strcasecmp(action, "terminate_session")) {
 916                 slrp_highest();
 917                 terminate_session();
 918         } else if (!strcasecmp(action, "edit_me")) {
 919                 edit_me();
 920         } else if (!strcasecmp(action, "display_siteconfig")) {
 921                 display_siteconfig();
 922         } else if (!strcasecmp(action, "siteconfig")) {
 923                 siteconfig();
 924         } else if (!strcasecmp(action, "display_generic")) {
 925                 display_generic();
 926         } else if (!strcasecmp(action, "do_generic")) {
 927                 do_generic();
 928         } else if (!strcasecmp(action, "display_menubar")) {
 929                 display_menubar(1);
 930         } else if (!strcasecmp(action, "diagnostics")) {
 931                 printf("HTTP/1.0 200 OK\n");
 932                 output_headers(1);
 933
 934                 wprintf("TransactionCount is %d<BR>\n", TransactionCount);
 935                 wprintf("You're in session %d<HR>\n", wc_session);
 936                 wprintf("Command: <BR><PRE>\n");
 937                 escputs(cmd);
 938                 wprintf("</PRE><HR>\n");
 939                 wprintf("Variables: <BR><PRE>\n");
 940                 dump_vars();
 941                 wprintf("</PRE><HR>\n");
 942                 wDumpContent(1);
 943         }
 944         /* When all else fais, display the main menu. */
 945         else {
 946                 display_main_menu();
 947         }
 948
 949         fflush(stdout);
 950         if (content != NULL) {
 951                 free(content);
 952                 content = NULL;
 953         }
 954         free_urls();
 955         if (upload_length > 0) {
 956                 free(upload);
 957                 upload_length = 0;
 958         }
 959 }
 960
 961 int main(int argc, char *argv[])
 962 {
 963
 964         char browser[256];
 965         int bd;
 966
 967         if (argc != 6) {
 968                 fprintf(stderr,
 969                         "webcit: usage error (argc must be 6, not %d)\n",
 970                         argc);
 971                 return 1;
 972         }
 973
 974         wc_session = atoi(argv[1]);
 975         defaulthost = argv[2];
 976         defaultport = argv[3];
 977
 978         strcpy(wc_username, "");
 979         strcpy(wc_password, "");
 980         strcpy(wc_roomname, "");
 981
 982         /* Clear out serv_info and temporarily set the value of serv_humannode
 983          * to a default value, because it'll be used in HTML page titles
 984          */
 985         memset(&serv_info, 0, sizeof(serv_info));
 986         strcpy(serv_info.serv_humannode, "WebCit");
 987
 988         strcpy(browser, argv[5]);
 989         bd = browser_braindamage_check(browser);
 990
 991         while (1) {
 992                 session_loop(argv[4], browser);
 993         }
 994 }