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[SIZ];
  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  * Returns a pointer to a buffer that must be freed by the caller!
 241  */
 242 void urlesc(char *outbuf, char *strbuf)
 243 {
 244         int a, b, c;
 245         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 246
 247         strcpy(outbuf, "");
 248
 249         for (a = 0; a < strlen(strbuf); ++a) {
 250                 c = 0;
 251                 for (b = 0; b < strlen(ec); ++b) {
 252                         if (strbuf[a] == ec[b])
 253                                 c = 1;
 254                 }
 255                 b = strlen(outbuf);
 256                 if (c == 1)
 257                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 258                 else
 259                         sprintf(&outbuf[b], "%c", strbuf[a]);
 260         }
 261 }
 262
 263 void urlescputs(char *strbuf)
 264 {
 265         char outbuf[SIZ];
 266
 267         urlesc(outbuf, strbuf);
 268         wprintf("%s", outbuf);
 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 room banner
 282  * 2 = HTTP headers required to terminate the session (unset cookies)
 283  * 3 = HTTP and HTML headers, but no room banner
 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[SIZ];
 292         int print_standard_html_head = 0;
 293         int refresh30 = 0;
 294         int suppress_check = 0;
 295         char httpnow[SIZ];
 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                 if (server_cookie != NULL) {
 320                         wprintf("%s\n", server_cookie);
 321                 }
 322         }
 323
 324         if (print_standard_html_head > 0) {
 325                 wprintf("\n");
 326                 wprintf("<HTML><HEAD><TITLE>");
 327                 escputs(serv_info.serv_humannode);
 328                 wprintf("</TITLE>\n"
 329                         "<META HTTP-EQUIV=\"Pragma\" CONTENT=\"no-cache\">\n"
 330                         "<META HTTP-EQUIV=\"expired\" CONTENT=\"28-May-1971 18:10:00 GMT\">\n"
 331                         "<META NAME=\"MSSmartTagsPreventParsing\" CONTENT=\"TRUE\">\n");
 332                 if (refresh30) wprintf(
 333                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"30\">\n");
 334                 else wprintf(
 335                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"500363689;\">\n");
 336                 wprintf("</HEAD>\n");
 337
 338                 /* script for checking for pages (not always launched) */
 339                 wprintf("<SCRIPT LANGUAGE=\"JavaScript\">\n");
 340                 wprintf("function launch_page_popup() {\n");
 341                 wprintf("pwin = window.open('/page_popup', 'CitaPage%d', "
 342                         "'toolbar=no,location=no,copyhistory=no,status=no,"
 343                         "scrollbars=yes,resizable=no,height=250,width=400');\n",
 344                         ++pageseq);
 345                 wprintf("}\n");
 346                 wprintf("</SCRIPT>\n");
 347                 /* end script */
 348
 349                 /* (JavaScript keyboard-based navigation would go here) */
 350
 351                 if (!suppress_check) if (WC->HaveExpressMessages) {
 352                         svprintf("extrabodyparms", WCS_STRING, "%s",
 353                                 "onload=\"launch_page_popup()\" ");
 354                         WC->HaveExpressMessages = 0;
 355                 }
 356                 do_template("background.html");
 357                 clear_local_substs();
 358
 359         if (print_standard_html_head == 1) {
 360                 wprintf("<A NAME=\"TheTop\"></A>");
 361
 362                 wprintf("<TABLE border=0 width=100%%><TR VALIGN=TOP>"
 363                         "<TD>\n");
 364
 365                 embed_room_banner(NULL);
 366
 367                 wprintf("</TD></TR><TR VALIGN=TOP><TD>\n");
 368
 369                 WC->fake_frames = 1;
 370                 }
 371         }
 372 }
 373
 374
 375 /*
 376  *
 377  */
 378 void http_redirect(char *whichpage) {
 379         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 380         wprintf("Location: %s\n", whichpage);
 381         wprintf("URI: %s\n", whichpage);
 382         wprintf("Content-type: text/html\n\n");
 383         wprintf("<html><body>\n");
 384         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 385                 whichpage);
 386         wprintf("</body></html>\n");
 387 }
 388
 389
 390
 391 void check_for_express_messages()
 392 {
 393         char buf[SIZ];
 394
 395         serv_puts("NOOP");
 396         serv_gets(buf);
 397         if (buf[3] == '*') WC->HaveExpressMessages = 1;
 398 }
 399
 400
 401
 402
 403 void output_static(char *what)
 404 {
 405         char buf[4096];
 406         FILE *fp;
 407         struct stat statbuf;
 408         off_t bytes;
 409         char *bigbuffer;
 410
 411         sprintf(buf, "static/%s", what);
 412         fp = fopen(buf, "rb");
 413         if (fp == NULL) {
 414                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 415                 wprintf("Content-Type: text/plain\n");
 416                 wprintf("\n");
 417                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 418         } else {
 419                 output_headers(0);
 420
 421                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 422                         wprintf("Content-type: image/gif\n");
 423                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 424                         wprintf("Content-type: text/plain\n");
 425                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 426                         wprintf("Content-type: image/jpeg\n");
 427                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 428                         wprintf("Content-type: text/html\n");
 429                 else
 430                         wprintf("Content-type: application/octet-stream\n");
 431
 432                 fstat(fileno(fp), &statbuf);
 433                 bytes = statbuf.st_size;
 434                 fprintf(stderr, "Static: %s, %ld bytes\n", what, bytes);
 435                 wprintf("Content-length: %ld\n", (long) bytes);
 436                 wprintf("\n");
 437                 bigbuffer = malloc(bytes);
 438                 fread(bigbuffer, bytes, 1, fp);
 439                 fclose(fp);
 440                 write(WC->http_sock, bigbuffer, bytes);
 441                 free(bigbuffer);
 442         }
 443         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 444                 end_webcit_session();
 445         }
 446 }
 447
 448
 449 /*
 450  * When the browser requests an image file from the Citadel server,
 451  * this function is called to transmit it.
 452  */
 453 void output_image()
 454 {
 455         char buf[SIZ];
 456         char xferbuf[4096];
 457         off_t bytes;
 458         off_t thisblock;
 459         off_t accomplished = 0L;
 460
 461
 462         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 463         serv_gets(buf);
 464         if (buf[0] == '2') {
 465                 bytes = extract_long(&buf[4], 0);
 466                 output_headers(0);
 467                 wprintf("Content-type: image/gif\n");
 468                 wprintf("Content-length: %ld\n", (long) bytes);
 469                 wprintf("\n");
 470
 471                 while (bytes > (off_t) 0) {
 472                         thisblock = (off_t) sizeof(xferbuf);
 473                         if (thisblock > bytes) {
 474                                 thisblock = bytes;
 475                         }
 476                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 477                         serv_gets(buf);
 478                         if (buf[0] == '6') {
 479                                 thisblock = extract_long(&buf[4], 0);
 480                                 serv_read(xferbuf, (int) thisblock);
 481                         }
 482                         else {
 483                                 memset(xferbuf, 0, thisblock);
 484                         }
 485                         write(WC->http_sock, xferbuf, thisblock);
 486                         bytes = bytes - thisblock;
 487                         accomplished = accomplished + thisblock;
 488                 }
 489                 serv_puts("CLOS");
 490                 serv_gets(buf);
 491         } else {
 492                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 493                 output_headers(0);
 494                 wprintf("Content-Type: text/plain\n");
 495                 wprintf("\n");
 496                 wprintf("Error retrieving image: %s\n", &buf[4]);
 497         }
 498
 499 }
 500
 501 /*
 502  */
 503 void output_mimepart()
 504 {
 505         char buf[SIZ];
 506         char xferbuf[4096];
 507         off_t bytes;
 508         off_t thisblock;
 509         off_t accomplished = 0L;
 510         char content_type[SIZ];
 511
 512         serv_printf("OPNA %s|%s", bstr("msgnum"), bstr("partnum"));
 513         serv_gets(buf);
 514         if (buf[0] == '2') {
 515                 bytes = extract_long(&buf[4], 0);
 516                 extract(content_type, &buf[4], 3);
 517                 output_headers(0);
 518                 wprintf("Content-type: %s\n", content_type);
 519                 wprintf("Content-length: %ld\n", (long) bytes);
 520                 wprintf("\n");
 521
 522                 while (bytes > (off_t) 0) {
 523                         thisblock = (off_t) sizeof(xferbuf);
 524                         if (thisblock > bytes) {
 525                                 thisblock = bytes;
 526                         }
 527                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 528                         serv_gets(buf);
 529                         if (buf[0] == '6') {
 530                                 thisblock = extract_long(&buf[4], 0);
 531                                 serv_read(xferbuf, (int) thisblock);
 532                         }
 533                         else {
 534                                 memset(xferbuf, 0, thisblock);
 535                         }
 536                         write(WC->http_sock, xferbuf, thisblock);
 537                         bytes = bytes - thisblock;
 538                         accomplished = accomplished + thisblock;
 539                 }
 540                 serv_puts("CLOS");
 541                 serv_gets(buf);
 542         } else {
 543                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 544                 output_headers(0);
 545                 wprintf("Content-Type: text/plain\n");
 546                 wprintf("\n");
 547                 wprintf("Error retrieving part: %s\n", &buf[4]);
 548         }
 549
 550 }
 551
 552
 553 /*
 554  * Convenience functions to display a page containing only a string
 555  */
 556 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 557 {
 558         wprintf("HTTP/1.0 200 OK\n");
 559         output_headers(1);
 560         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
 561         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 562         wprintf("<B>%s</B>\n", titlebarmsg);
 563         wprintf("</FONT></TD></TR></TABLE><BR>\n");
 564         escputs(messagetext);
 565
 566         wprintf("<HR>\n");
 567         wDumpContent(1);
 568 }
 569
 570
 571 /*
 572  * Display a blank page.
 573  */
 574 void blank_page(void) {
 575         output_headers(7);
 576         wDumpContent(2);
 577 }
 578
 579
 580 void display_error(char *errormessage)
 581 {
 582         convenience_page("770000", "Error", errormessage);
 583 }
 584
 585 void display_success(char *successmessage)
 586 {
 587         convenience_page("007700", "OK", successmessage);
 588 }
 589
 590
 591
 592 void extract_action(char *actbuf, char *cmdbuf)
 593 {
 594         int i;
 595
 596         strcpy(actbuf, cmdbuf);
 597         if (!strncasecmp(actbuf, "GET /", 5))
 598                 strcpy(actbuf, &actbuf[5]);
 599         if (!strncasecmp(actbuf, "PUT /", 5))
 600                 strcpy(actbuf, &actbuf[5]);
 601         if (!strncasecmp(actbuf, "POST /", 6))
 602                 strcpy(actbuf, &actbuf[6]);
 603
 604         for (i = 0; i < strlen(actbuf); ++i) {
 605                 if (actbuf[i] == ' ') {
 606                         actbuf[i] = 0;
 607                         i = 0;
 608                 }
 609                 if (actbuf[i] == '/') {
 610                         actbuf[i] = 0;
 611                         i = 0;
 612                 }
 613                 if (actbuf[i] == '?') {
 614                         actbuf[i] = 0;
 615                         i = 0;
 616                 }
 617                 if (actbuf[i] == '&') {
 618                         actbuf[i] = 0;
 619                         i = 0;
 620                 }
 621         }
 622 }
 623
 624
 625 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 626                         void *content, char *cbtype, size_t length,
 627                         char *encoding, void *userdata)
 628 {
 629
 630         fprintf(stderr, "UPLOAD HANDLER CALLED\n");
 631         fprintf(stderr, "    name = %s\n", name);
 632         fprintf(stderr, "filename = %s\n", filename);
 633         fprintf(stderr, "encoding = %s\n", encoding);
 634         fprintf(stderr, "    type = %s\n", cbtype);
 635         fprintf(stderr, "  length = %ld\n", (long)length);
 636
 637         if (length > 0) {
 638                 WC->upload = malloc(length);
 639                 if (WC->upload != NULL) {
 640                         WC->upload_length = length;
 641                         memcpy(WC->upload, content, length);
 642                 }
 643                 else {
 644                         fprintf(stderr, "malloc() failed: %s\n",
 645                                 strerror(errno));
 646                 }
 647         }
 648 }
 649
 650
 651 /*
 652  * Entry point for WebCit transaction
 653  */
 654 void session_loop(struct httprequest *req)
 655 {
 656         char cmd[SIZ];
 657         char action[SIZ];
 658         char buf[SIZ];
 659         int a, b;
 660         int ContentLength = 0;
 661         int BytesRead;
 662         char ContentType[512];
 663         char *content;
 664         char *content_end;
 665         struct httprequest *hptr;
 666         char browser_host[SIZ];
 667         char user_agent[SIZ];
 668
 669         /* We stuff these with the values coming from the client cookies,
 670          * so we can use them to reconnect a timed out session if we have to.
 671          */
 672         char c_host[SIZ];
 673         char c_port[SIZ];
 674         char c_username[SIZ];
 675         char c_password[SIZ];
 676         char c_roomname[SIZ];
 677         char cookie[SIZ];
 678
 679         strcpy(c_host, defaulthost);
 680         strcpy(c_port, defaultport);
 681         strcpy(c_username, "");
 682         strcpy(c_password, "");
 683         strcpy(c_roomname, "");
 684
 685         WC->upload_length = 0;
 686         WC->upload = NULL;
 687
 688         hptr = req;
 689         if (hptr == NULL) return;
 690
 691         strcpy(cmd, hptr->line);
 692         hptr = hptr->next;
 693         extract_action(action, cmd);
 694
 695         while (hptr != NULL) {
 696                 strcpy(buf, hptr->line);
 697                 hptr = hptr->next;
 698
 699                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 700                         strcpy(cookie, &buf[15]);
 701                         cookie_to_stuff(cookie, NULL,
 702                                       c_username, c_password, c_roomname);
 703                 }
 704                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 705                         ContentLength = atoi(&buf[16]);
 706                 }
 707                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 708                         strcpy(ContentType, &buf[14]);
 709                 }
 710                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 711                         strcpy(user_agent, &buf[12]);
 712                 }
 713         }
 714
 715         if (ContentLength > 0) {
 716                 fprintf(stderr, "Content length: %d\n", ContentLength);
 717                 content = malloc(ContentLength + 1);
 718                 memset(content, 0, ContentLength+1);
 719                 BytesRead = 0;
 720
 721                 while (BytesRead < ContentLength) {
 722                         a=read(WC->http_sock, &content[BytesRead],
 723                                 ContentLength - BytesRead);
 724                         if (a <= 0) BytesRead = ContentLength;
 725                         else BytesRead += a;
 726                 }
 727
 728                 if (!strncasecmp(ContentType,
 729                               "application/x-www-form-urlencoded", 33)) {
 730                         addurls(content);
 731                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 732                         content_end = content + ContentLength;
 733                         mime_parser(content, content_end, *upload_handler,
 734                                         NULL, NULL, NULL, 0);
 735                 }
 736         } else {
 737                 content = NULL;
 738         }
 739
 740         /* If there are variables in the URL, we must grab them now */
 741         for (a = 0; a < strlen(cmd); ++a)
 742                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 743                         for (b = a; b < strlen(cmd); ++b)
 744                                 if (isspace(cmd[b]))
 745                                         cmd[b] = 0;
 746                         addurls(&cmd[a + 1]);
 747                         cmd[a] = 0;
 748                 }
 749         /*
 750          * If we're not connected to a Citadel server, try to hook up the
 751          * connection now.  Preference is given to the host and port specified
 752          * by browser cookies, if cookies have been supplied.
 753          */
 754         if (!WC->connected) {
 755                 if (strlen(bstr("host")) > 0)
 756                         strcpy(c_host, bstr("host"));
 757                 if (strlen(bstr("port")) > 0)
 758                         strcpy(c_port, bstr("port"));
 759
 760                 if (!strcasecmp(c_host, "uds")) {
 761                         /* unix domain socket */
 762                         sprintf(buf, "%s/citadel.socket", c_port);
 763                         WC->serv_sock = uds_connectsock(buf);
 764                 }
 765                 else {
 766                         /* tcp socket */
 767                         WC->serv_sock = tcp_connectsock(c_host, c_port);
 768                 }
 769
 770                 if (WC->serv_sock < 0) {
 771                         do_logout();
 772                         goto SKIP_ALL_THIS_CRAP;
 773                 }
 774                 else {
 775                         WC->connected = 1;
 776                         serv_gets(buf); /* get the server welcome message */
 777                         locate_host(browser_host, WC->http_sock);
 778                         get_serv_info(browser_host, user_agent);
 779                 }
 780         }
 781
 782         check_for_express_messages();
 783
 784         /*
 785          * If we're not logged in, but we have username and password cookies
 786          * supplied by the browser, try using them to log in.
 787          */
 788         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 789                 serv_printf("USER %s", c_username);
 790                 serv_gets(buf);
 791                 if (buf[0] == '3') {
 792                         serv_printf("PASS %s", c_password);
 793                         serv_gets(buf);
 794                         if (buf[0] == '2') {
 795                                 become_logged_in(c_username, c_password, buf);
 796                         }
 797                 }
 798         }
 799         /*
 800          * If we don't have a current room, but a cookie specifying the
 801          * current room is supplied, make an effort to go there.
 802          */
 803         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 804                 serv_printf("GOTO %s", c_roomname);
 805                 serv_gets(buf);
 806                 if (buf[0] == '2') {
 807                         strcpy(WC->wc_roomname, c_roomname);
 808                 }
 809         }
 810         if (!strcasecmp(action, "static")) {
 811                 strcpy(buf, &cmd[12]);
 812                 for (a = 0; a < strlen(buf); ++a)
 813                         if (isspace(buf[a]))
 814                                 buf[a] = 0;
 815                 output_static(buf);
 816         } else if (!strcasecmp(action, "image")) {
 817                 output_image();
 818         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
 819                 do_login();
 820         } else if (!WC->logged_in) {
 821                 display_login(NULL);
 822         }
 823         /* Various commands... */
 824
 825         else if (!strcasecmp(action, "do_welcome")) {
 826                 do_welcome();
 827         } else if (!strcasecmp(action, "blank")) {
 828                 blank_page();
 829         } else if (!strcasecmp(action, "display_main_menu")) {
 830                 display_main_menu();
 831         } else if (!strcasecmp(action, "whobbs")) {
 832                 whobbs();
 833         } else if (!strcasecmp(action, "knrooms")) {
 834                 list_all_rooms_by_floor();
 835         } else if (!strcasecmp(action, "gotonext")) {
 836                 slrp_highest();
 837                 gotonext();
 838         } else if (!strcasecmp(action, "skip")) {
 839                 gotonext();
 840         } else if (!strcasecmp(action, "ungoto")) {
 841                 ungoto();
 842         } else if (!strcasecmp(action, "dotgoto")) {
 843                 slrp_highest();
 844                 smart_goto(bstr("room"));
 845         } else if (!strcasecmp(action, "dotskip")) {
 846                 smart_goto(bstr("room"));
 847         } else if (!strcasecmp(action, "termquit")) {
 848                 do_logout();
 849         } else if (!strcasecmp(action, "readnew")) {
 850                 readloop("readnew");
 851         } else if (!strcasecmp(action, "readold")) {
 852                 readloop("readold");
 853         } else if (!strcasecmp(action, "readfwd")) {
 854                 readloop("readfwd");
 855         } else if (!strcasecmp(action, "headers")) {
 856                 readloop("headers");
 857         } else if (!strcasecmp(action, "display_enter")) {
 858                 display_enter();
 859         } else if (!strcasecmp(action, "post")) {
 860                 post_message();
 861         } else if (!strcasecmp(action, "delete_msg")) {
 862                 delete_msg();
 863         } else if (!strcasecmp(action, "confirm_move_msg")) {
 864                 confirm_move_msg();
 865         } else if (!strcasecmp(action, "move_msg")) {
 866                 move_msg();
 867         } else if (!strcasecmp(action, "userlist")) {
 868                 userlist();
 869         } else if (!strcasecmp(action, "showuser")) {
 870                 showuser();
 871         } else if (!strcasecmp(action, "display_page")) {
 872                 display_page();
 873         } else if (!strcasecmp(action, "page_user")) {
 874                 page_user();
 875         } else if (!strcasecmp(action, "chat")) {
 876                 do_chat();
 877         } else if (!strcasecmp(action, "display_private")) {
 878                 display_private("", 0);
 879         } else if (!strcasecmp(action, "goto_private")) {
 880                 goto_private();
 881         } else if (!strcasecmp(action, "zapped_list")) {
 882                 zapped_list();
 883         } else if (!strcasecmp(action, "display_zap")) {
 884                 display_zap();
 885         } else if (!strcasecmp(action, "zap")) {
 886                 zap();
 887         } else if (!strcasecmp(action, "display_entroom")) {
 888                 display_entroom();
 889         } else if (!strcasecmp(action, "entroom")) {
 890                 entroom();
 891         } else if (!strcasecmp(action, "display_editroom")) {
 892                 display_editroom();
 893         } else if (!strcasecmp(action, "netedit")) {
 894                 netedit();
 895         } else if (!strcasecmp(action, "editroom")) {
 896                 editroom();
 897         } else if (!strcasecmp(action, "display_whok")) {
 898                 display_whok();
 899         } else if (!strcasecmp(action, "display_editinfo")) {
 900                 display_edit("Room info", "EINF 0", "RINF", "/editinfo");
 901         } else if (!strcasecmp(action, "editinfo")) {
 902                 save_edit("Room info", "EINF 1", 1);
 903         } else if (!strcasecmp(action, "display_editbio")) {
 904                 sprintf(buf, "RBIO %s", WC->wc_username);
 905                 display_edit("Your bio", "NOOP", buf, "editbio");
 906         } else if (!strcasecmp(action, "editbio")) {
 907                 save_edit("Your bio", "EBIO", 0);
 908         } else if (!strcasecmp(action, "confirm_delete_room")) {
 909                 confirm_delete_room();
 910         } else if (!strcasecmp(action, "delete_room")) {
 911                 delete_room();
 912         } else if (!strcasecmp(action, "validate")) {
 913                 validate();
 914         } else if (!strcasecmp(action, "display_editpic")) {
 915                 display_graphics_upload("your photo",
 916                                         "UIMG 0|_userpic_",
 917                                         "/editpic");
 918         } else if (!strcasecmp(action, "editpic")) {
 919                 do_graphics_upload("UIMG 1|_userpic_");
 920         } else if (!strcasecmp(action, "display_editroompic")) {
 921                 display_graphics_upload("the graphic for this room",
 922                                         "UIMG 0|_roompic_",
 923                                         "/editroompic");
 924         } else if (!strcasecmp(action, "editroompic")) {
 925                 do_graphics_upload("UIMG 1|_roompic_");
 926         } else if (!strcasecmp(action, "select_floor_to_edit_pic")) {
 927                 select_floor_to_edit_pic();
 928         } else if (!strcasecmp(action, "display_editfloorpic")) {
 929                 sprintf(buf, "UIMG 0|_floorpic_|%s",
 930                         bstr("which_floor"));
 931                 display_graphics_upload("the graphic for this floor",
 932                                         buf,
 933                                         "/editfloorpic");
 934         } else if (!strcasecmp(action, "editfloorpic")) {
 935                 sprintf(buf, "UIMG 1|_floorpic_|%s",
 936                         bstr("which_floor"));
 937                 do_graphics_upload(buf);
 938         } else if (!strcasecmp(action, "display_reg")) {
 939                 display_reg(0);
 940         } else if (!strcasecmp(action, "register")) {
 941                 register_user();
 942         } else if (!strcasecmp(action, "display_changepw")) {
 943                 display_changepw();
 944         } else if (!strcasecmp(action, "changepw")) {
 945                 changepw();
 946         } else if (!strcasecmp(action, "display_edit_node")) {
 947                 display_edit_node();
 948         } else if (!strcasecmp(action, "edit_node")) {
 949                 edit_node();
 950         } else if (!strcasecmp(action, "display_netconf")) {
 951                 display_netconf();
 952         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
 953                 display_confirm_delete_node();
 954         } else if (!strcasecmp(action, "delete_node")) {
 955                 delete_node();
 956         } else if (!strcasecmp(action, "display_add_node")) {
 957                 display_add_node();
 958         } else if (!strcasecmp(action, "add_node")) {
 959                 add_node();
 960         } else if (!strcasecmp(action, "terminate_session")) {
 961                 slrp_highest();
 962                 terminate_session();
 963         } else if (!strcasecmp(action, "edit_me")) {
 964                 edit_me();
 965         } else if (!strcasecmp(action, "display_siteconfig")) {
 966                 display_siteconfig();
 967         } else if (!strcasecmp(action, "page_popup")) {
 968                 page_popup();
 969         } else if (!strcasecmp(action, "siteconfig")) {
 970                 siteconfig();
 971         } else if (!strcasecmp(action, "display_generic")) {
 972                 display_generic();
 973         } else if (!strcasecmp(action, "do_generic")) {
 974                 do_generic();
 975         } else if (!strcasecmp(action, "display_menubar")) {
 976                 display_menubar(1);
 977         } else if (!strcasecmp(action, "output_mimepart")) {
 978                 output_mimepart();
 979         } else if (!strcasecmp(action, "diagnostics")) {
 980                 output_headers(1);
 981
 982                 wprintf("You're in session %d<HR>\n", WC->wc_session);
 983                 wprintf("Command: <BR><PRE>\n");
 984                 escputs(cmd);
 985                 wprintf("</PRE><HR>\n");
 986                 wprintf("Variables: <BR><PRE>\n");
 987                 dump_vars();
 988                 wprintf("</PRE><HR>\n");
 989                 wDumpContent(1);
 990         }
 991         /* When all else fais, display the main menu. */
 992         else {
 993                 display_main_menu();
 994         }
 995
 996 SKIP_ALL_THIS_CRAP:
 997         fflush(stdout);
 998         if (content != NULL) {
 999                 free(content);
1000                 content = NULL;
1001         }
1002         free_urls();
1003         if (WC->upload_length > 0) {
1004                 free(WC->upload);
1005                 WC->upload_length = 0;
1006         }
1007 }