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=\"Pragma\" CONTENT=\"no-cache\">\n"
 326                         "<META HTTP-EQUIV=\"expired\" CONTENT=\"28-May-1971 18:10:00 GMT\">\n"
 327                         "<meta name=\"MSSmartTagsPreventParsing\" content=\"TRUE\">\n");
 328                 if (refresh30) wprintf(
 329                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"30\">\n");
 330                 else wprintf(
 331                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"500363689;\">\n");
 332                 wprintf("</HEAD>\n");
 333
 334                 /* script for checking for pages (not always launched) */
 335                 wprintf("<SCRIPT LANGUAGE=\"JavaScript\">\n");
 336                 wprintf("function launch_page_popup() {\n");
 337                 wprintf("pwin = window.open('/page_popup', 'CitaPage%d', "
 338                         "'toolbar=no,location=no,copyhistory=no,status=no,"
 339                         "scrollbars=yes,resizable=no,height=150,width=400');\n",
 340                         ++pageseq);
 341                 wprintf("}\n");
 342                 wprintf("</SCRIPT>\n");
 343                 /* end script */
 344
 345                 /* (JavaScript keyboard-based navigation would go here) */
 346
 347                 if (!suppress_check) if (WC->HaveExpressMessages) {
 348                         svprintf("extrabodyparms", WCS_STRING, "%s",
 349                                 "onload=\"launch_page_popup()\" ");
 350                         WC->HaveExpressMessages = 0;
 351                 }
 352                 do_template("background.html");
 353                 clear_local_substs();
 354
 355         if (print_standard_html_head == 1) {
 356                 wprintf("<A NAME=\"TheTop\"></A>");
 357
 358                 wprintf("<TABLE border=0 width=100%%><TR VALIGN=TOP>"
 359                         "<TD>\n");
 360
 361                 embed_room_banner(NULL);
 362
 363                 wprintf("</TD></TR><TR VALIGN=TOP><TD>\n");
 364
 365                 WC->fake_frames = 1;
 366                 }
 367         }
 368 }
 369
 370
 371 /*
 372  *
 373  */
 374 void http_redirect(char *whichpage) {
 375         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 376         wprintf("Location: %s\n", whichpage);
 377         wprintf("URI: %s\n", whichpage);
 378         wprintf("Content-type: text/html\n\n");
 379         wprintf("<html><body>\n");
 380         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 381                 whichpage);
 382         wprintf("</body></html>\n");
 383 }
 384
 385
 386
 387 void check_for_express_messages()
 388 {
 389         char buf[256];
 390
 391         serv_puts("NOOP");
 392         serv_gets(buf);
 393         if (buf[3] == '*') WC->HaveExpressMessages = 1;
 394 }
 395
 396
 397
 398
 399 void output_static(char *what)
 400 {
 401         char buf[4096];
 402         FILE *fp;
 403         struct stat statbuf;
 404         off_t bytes;
 405         char *bigbuffer;
 406
 407         sprintf(buf, "static/%s", what);
 408         fp = fopen(buf, "rb");
 409         if (fp == NULL) {
 410                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 411                 wprintf("Content-Type: text/plain\n");
 412                 wprintf("\n");
 413                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 414         } else {
 415                 output_headers(0);
 416
 417                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 418                         wprintf("Content-type: image/gif\n");
 419                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 420                         wprintf("Content-type: text/plain\n");
 421                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 422                         wprintf("Content-type: image/jpeg\n");
 423                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 424                         wprintf("Content-type: text/html\n");
 425                 else
 426                         wprintf("Content-type: application/octet-stream\n");
 427
 428                 fstat(fileno(fp), &statbuf);
 429                 bytes = statbuf.st_size;
 430                 fprintf(stderr, "Static: %s, %ld bytes\n", what, bytes);
 431                 wprintf("Content-length: %ld\n", (long) bytes);
 432                 wprintf("\n");
 433                 bigbuffer = malloc(bytes);
 434                 fread(bigbuffer, bytes, 1, fp);
 435                 fclose(fp);
 436                 write(WC->http_sock, bigbuffer, bytes);
 437                 free(bigbuffer);
 438         }
 439         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 440                 end_webcit_session();
 441         }
 442 }
 443
 444
 445 /*
 446  * When the browser requests an image file from the Citadel server,
 447  * this function is called to transmit it.
 448  */
 449 void output_image()
 450 {
 451         char buf[256];
 452         char xferbuf[4096];
 453         off_t bytes;
 454         off_t thisblock;
 455         off_t accomplished = 0L;
 456
 457
 458         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 459         serv_gets(buf);
 460         if (buf[0] == '2') {
 461                 bytes = extract_long(&buf[4], 0);
 462                 output_headers(0);
 463                 wprintf("Content-type: image/gif\n");
 464                 wprintf("Content-length: %ld\n", (long) bytes);
 465                 wprintf("\n");
 466
 467                 while (bytes > (off_t) 0) {
 468                         thisblock = (off_t) sizeof(xferbuf);
 469                         if (thisblock > bytes) {
 470                                 thisblock = bytes;
 471                         }
 472                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 473                         serv_gets(buf);
 474                         if (buf[0] == '6') {
 475                                 thisblock = extract_long(&buf[4], 0);
 476                                 serv_read(xferbuf, (int) thisblock);
 477                         }
 478                         else {
 479                                 memset(xferbuf, 0, thisblock);
 480                         }
 481                         write(WC->http_sock, xferbuf, thisblock);
 482                         bytes = bytes - thisblock;
 483                         accomplished = accomplished + thisblock;
 484                 }
 485                 serv_puts("CLOS");
 486                 serv_gets(buf);
 487         } else {
 488                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 489                 output_headers(0);
 490                 wprintf("Content-Type: text/plain\n");
 491                 wprintf("\n");
 492                 wprintf("Error retrieving image: %s\n", &buf[4]);
 493         }
 494
 495 }
 496
 497 /*
 498  */
 499 void output_mimepart()
 500 {
 501         char buf[256];
 502         char xferbuf[4096];
 503         off_t bytes;
 504         off_t thisblock;
 505         off_t accomplished = 0L;
 506         char content_type[256];
 507
 508         serv_printf("OPNA %s|%s", bstr("msgnum"), bstr("partnum"));
 509         serv_gets(buf);
 510         if (buf[0] == '2') {
 511                 bytes = extract_long(&buf[4], 0);
 512                 extract(content_type, &buf[4], 3);
 513                 output_headers(0);
 514                 wprintf("Content-type: %s\n", content_type);
 515                 wprintf("Content-length: %ld\n", (long) bytes);
 516                 wprintf("\n");
 517
 518                 while (bytes > (off_t) 0) {
 519                         thisblock = (off_t) sizeof(xferbuf);
 520                         if (thisblock > bytes) {
 521                                 thisblock = bytes;
 522                         }
 523                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 524                         serv_gets(buf);
 525                         if (buf[0] == '6') {
 526                                 thisblock = extract_long(&buf[4], 0);
 527                                 serv_read(xferbuf, (int) thisblock);
 528                         }
 529                         else {
 530                                 memset(xferbuf, 0, thisblock);
 531                         }
 532                         write(WC->http_sock, xferbuf, thisblock);
 533                         bytes = bytes - thisblock;
 534                         accomplished = accomplished + thisblock;
 535                 }
 536                 serv_puts("CLOS");
 537                 serv_gets(buf);
 538         } else {
 539                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 540                 output_headers(0);
 541                 wprintf("Content-Type: text/plain\n");
 542                 wprintf("\n");
 543                 wprintf("Error retrieving part: %s\n", &buf[4]);
 544         }
 545
 546 }
 547
 548
 549 /*
 550  * Convenience functions to display a page containing only a string
 551  */
 552 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 553 {
 554         wprintf("HTTP/1.0 200 OK\n");
 555         output_headers(1);
 556         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
 557         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 558         wprintf("<B>%s</B>\n", titlebarmsg);
 559         wprintf("</FONT></TD></TR></TABLE><BR>\n");
 560         escputs(messagetext);
 561
 562         wprintf("<HR>\n");
 563         wDumpContent(1);
 564 }
 565
 566
 567 /*
 568  * Display a blank page.
 569  */
 570 void blank_page(void) {
 571         output_headers(7);
 572         wDumpContent(2);
 573 }
 574
 575
 576 void display_error(char *errormessage)
 577 {
 578         convenience_page("770000", "Error", errormessage);
 579 }
 580
 581 void display_success(char *successmessage)
 582 {
 583         convenience_page("007700", "OK", successmessage);
 584 }
 585
 586
 587
 588 void extract_action(char *actbuf, char *cmdbuf)
 589 {
 590         int i;
 591
 592         strcpy(actbuf, cmdbuf);
 593         if (!strncasecmp(actbuf, "GET /", 5))
 594                 strcpy(actbuf, &actbuf[5]);
 595         if (!strncasecmp(actbuf, "PUT /", 5))
 596                 strcpy(actbuf, &actbuf[5]);
 597         if (!strncasecmp(actbuf, "POST /", 6))
 598                 strcpy(actbuf, &actbuf[6]);
 599
 600         for (i = 0; i < strlen(actbuf); ++i) {
 601                 if (actbuf[i] == ' ') {
 602                         actbuf[i] = 0;
 603                         i = 0;
 604                 }
 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         }
 618 }
 619
 620
 621 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 622                         void *content, char *cbtype, size_t length,
 623                         char *encoding, void *userdata)
 624 {
 625
 626         fprintf(stderr, "UPLOAD HANDLER CALLED\n");
 627         fprintf(stderr, "    name = %s\n", name);
 628         fprintf(stderr, "filename = %s\n", filename);
 629         fprintf(stderr, "encoding = %s\n", encoding);
 630         fprintf(stderr, "    type = %s\n", cbtype);
 631         fprintf(stderr, "  length = %ld\n", (long)length);
 632
 633         if ( (strlen(name) > 0) || (strlen(filename) > 0) ) {
 634                 WC->upload = malloc(length);
 635                 if (WC->upload != NULL) {
 636                         WC->upload_length = length;
 637                         memcpy(WC->upload, content, length);
 638                 }
 639         }
 640 }
 641
 642
 643 /*
 644  * Entry point for WebCit transaction
 645  */
 646 void session_loop(struct httprequest *req)
 647 {
 648         char cmd[256];
 649         char action[256];
 650         char buf[256];
 651         int a, b;
 652         int ContentLength = 0;
 653         int BytesRead;
 654         char ContentType[512];
 655         char *content;
 656         char *content_end;
 657         struct httprequest *hptr;
 658         char browser_host[256];
 659         char user_agent[256];
 660
 661         /* We stuff these with the values coming from the client cookies,
 662          * so we can use them to reconnect a timed out session if we have to.
 663          */
 664         char c_host[256];
 665         char c_port[256];
 666         char c_username[256];
 667         char c_password[256];
 668         char c_roomname[256];
 669         char cookie[256];
 670
 671         strcpy(c_host, defaulthost);
 672         strcpy(c_port, defaultport);
 673         strcpy(c_username, "");
 674         strcpy(c_password, "");
 675         strcpy(c_roomname, "");
 676
 677         WC->upload_length = 0;
 678         WC->upload = NULL;
 679
 680         hptr = req;
 681         if (hptr == NULL) return;
 682
 683         strcpy(cmd, hptr->line);
 684         hptr = hptr->next;
 685         extract_action(action, cmd);
 686
 687         while (hptr != NULL) {
 688                 strcpy(buf, hptr->line);
 689                 hptr = hptr->next;
 690
 691                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 692                         strcpy(cookie, &buf[15]);
 693                         cookie_to_stuff(cookie, NULL,
 694                                       c_username, c_password, c_roomname);
 695                 }
 696                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 697                         ContentLength = atoi(&buf[16]);
 698                 }
 699                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 700                         strcpy(ContentType, &buf[14]);
 701                 }
 702                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 703                         strcpy(user_agent, &buf[12]);
 704                 }
 705         }
 706
 707         if (ContentLength > 0) {
 708                 fprintf(stderr, "Content length: %d\n", ContentLength);
 709                 content = malloc(ContentLength + 1);
 710                 memset(content, 0, ContentLength+1);
 711                 BytesRead = 0;
 712
 713                 while (BytesRead < ContentLength) {
 714                         a=read(WC->http_sock, &content[BytesRead],
 715                                 ContentLength - BytesRead);
 716                         if (a <= 0) BytesRead = ContentLength;
 717                         else BytesRead += a;
 718                 }
 719
 720                 if (!strncasecmp(ContentType,
 721                               "application/x-www-form-urlencoded", 33)) {
 722                         addurls(content);
 723                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 724                         content_end = content + ContentLength;
 725                         mime_parser(content, content_end, *upload_handler,
 726                                         NULL, NULL, NULL, 0);
 727                 }
 728         } else {
 729                 content = NULL;
 730         }
 731
 732         /* If there are variables in the URL, we must grab them now */
 733         for (a = 0; a < strlen(cmd); ++a)
 734                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 735                         for (b = a; b < strlen(cmd); ++b)
 736                                 if (isspace(cmd[b]))
 737                                         cmd[b] = 0;
 738                         addurls(&cmd[a + 1]);
 739                         cmd[a] = 0;
 740                 }
 741         /*
 742          * If we're not connected to a Citadel server, try to hook up the
 743          * connection now.  Preference is given to the host and port specified
 744          * by browser cookies, if cookies have been supplied.
 745          */
 746         if (!WC->connected) {
 747                 if (strlen(bstr("host")) > 0)
 748                         strcpy(c_host, bstr("host"));
 749                 if (strlen(bstr("port")) > 0)
 750                         strcpy(c_port, bstr("port"));
 751
 752                 if (!strcasecmp(c_host, "uds")) {
 753                         /* unix domain socket */
 754                         sprintf(buf, "%s/citadel.socket", c_port);
 755                         WC->serv_sock = uds_connectsock(buf);
 756                 }
 757                 else {
 758                         /* tcp socket */
 759                         WC->serv_sock = tcp_connectsock(c_host, c_port);
 760                 }
 761
 762                 if (WC->serv_sock < 0) {
 763                         do_logout();
 764                         goto SKIP_ALL_THIS_CRAP;
 765                 }
 766                 else {
 767                         WC->connected = 1;
 768                         serv_gets(buf); /* get the server welcome message */
 769                         locate_host(browser_host, WC->http_sock);
 770                         get_serv_info(browser_host, user_agent);
 771                 }
 772         }
 773
 774         check_for_express_messages();
 775
 776         /*
 777          * If we're not logged in, but we have username and password cookies
 778          * supplied by the browser, try using them to log in.
 779          */
 780         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 781                 serv_printf("USER %s", c_username);
 782                 serv_gets(buf);
 783                 if (buf[0] == '3') {
 784                         serv_printf("PASS %s", c_password);
 785                         serv_gets(buf);
 786                         if (buf[0] == '2') {
 787                                 become_logged_in(c_username, c_password, buf);
 788                         }
 789                 }
 790         }
 791         /*
 792          * If we don't have a current room, but a cookie specifying the
 793          * current room is supplied, make an effort to go there.
 794          */
 795         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 796                 serv_printf("GOTO %s", c_roomname);
 797                 serv_gets(buf);
 798                 if (buf[0] == '2') {
 799                         strcpy(WC->wc_roomname, c_roomname);
 800                 }
 801         }
 802         if (!strcasecmp(action, "static")) {
 803                 strcpy(buf, &cmd[12]);
 804                 for (a = 0; a < strlen(buf); ++a)
 805                         if (isspace(buf[a]))
 806                                 buf[a] = 0;
 807                 output_static(buf);
 808         } else if (!strcasecmp(action, "image")) {
 809                 output_image();
 810         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
 811                 do_login();
 812         } else if (!WC->logged_in) {
 813                 display_login(NULL);
 814         }
 815         /* Various commands... */
 816
 817         else if (!strcasecmp(action, "do_welcome")) {
 818                 do_welcome();
 819         } else if (!strcasecmp(action, "blank")) {
 820                 blank_page();
 821         } else if (!strcasecmp(action, "display_main_menu")) {
 822                 display_main_menu();
 823         } else if (!strcasecmp(action, "whobbs")) {
 824                 whobbs();
 825         } else if (!strcasecmp(action, "knrooms")) {
 826                 list_all_rooms_by_floor();
 827         } else if (!strcasecmp(action, "gotonext")) {
 828                 slrp_highest();
 829                 gotonext();
 830         } else if (!strcasecmp(action, "skip")) {
 831                 gotonext();
 832         } else if (!strcasecmp(action, "ungoto")) {
 833                 ungoto();
 834         } else if (!strcasecmp(action, "dotgoto")) {
 835                 slrp_highest();
 836                 smart_goto(bstr("room"));
 837         } else if (!strcasecmp(action, "dotskip")) {
 838                 smart_goto(bstr("room"));
 839         } else if (!strcasecmp(action, "termquit")) {
 840                 do_logout();
 841         } else if (!strcasecmp(action, "readnew")) {
 842                 readloop("readnew");
 843         } else if (!strcasecmp(action, "readold")) {
 844                 readloop("readold");
 845         } else if (!strcasecmp(action, "readfwd")) {
 846                 readloop("readfwd");
 847         } else if (!strcasecmp(action, "headers")) {
 848                 readloop("headers");
 849         } else if (!strcasecmp(action, "display_enter")) {
 850                 display_enter();
 851         } else if (!strcasecmp(action, "post")) {
 852                 post_message();
 853         } else if (!strcasecmp(action, "delete_msg")) {
 854                 delete_msg();
 855         } else if (!strcasecmp(action, "confirm_move_msg")) {
 856                 confirm_move_msg();
 857         } else if (!strcasecmp(action, "move_msg")) {
 858                 move_msg();
 859         } else if (!strcasecmp(action, "userlist")) {
 860                 userlist();
 861         } else if (!strcasecmp(action, "showuser")) {
 862                 showuser();
 863         } else if (!strcasecmp(action, "display_page")) {
 864                 display_page();
 865         } else if (!strcasecmp(action, "page_user")) {
 866                 page_user();
 867         } else if (!strcasecmp(action, "chat")) {
 868                 do_chat();
 869         } else if (!strcasecmp(action, "display_private")) {
 870                 display_private("", 0);
 871         } else if (!strcasecmp(action, "goto_private")) {
 872                 goto_private();
 873         } else if (!strcasecmp(action, "zapped_list")) {
 874                 zapped_list();
 875         } else if (!strcasecmp(action, "display_zap")) {
 876                 display_zap();
 877         } else if (!strcasecmp(action, "zap")) {
 878                 zap();
 879         } else if (!strcasecmp(action, "display_entroom")) {
 880                 display_entroom();
 881         } else if (!strcasecmp(action, "entroom")) {
 882                 entroom();
 883         } else if (!strcasecmp(action, "display_editroom")) {
 884                 display_editroom();
 885         } else if (!strcasecmp(action, "editroom")) {
 886                 editroom();
 887         } else if (!strcasecmp(action, "display_whok")) {
 888                 display_whok();
 889         } else if (!strcasecmp(action, "display_editinfo")) {
 890                 display_edit("Room info", "EINF 0", "RINF", "/editinfo");
 891         } else if (!strcasecmp(action, "editinfo")) {
 892                 save_edit("Room info", "EINF 1", 1);
 893         } else if (!strcasecmp(action, "display_editbio")) {
 894                 sprintf(buf, "RBIO %s", WC->wc_username);
 895                 display_edit("Your bio", "NOOP", buf, "editbio");
 896         } else if (!strcasecmp(action, "editbio")) {
 897                 save_edit("Your bio", "EBIO", 0);
 898         } else if (!strcasecmp(action, "confirm_delete_room")) {
 899                 confirm_delete_room();
 900         } else if (!strcasecmp(action, "delete_room")) {
 901                 delete_room();
 902         } else if (!strcasecmp(action, "validate")) {
 903                 validate();
 904         } else if (!strcasecmp(action, "display_editpic")) {
 905                 display_graphics_upload("your photo",
 906                                         "UIMG 0|_userpic_",
 907                                         "/editpic");
 908         } else if (!strcasecmp(action, "editpic")) {
 909                 do_graphics_upload("UIMG 1|_userpic_");
 910         } else if (!strcasecmp(action, "display_editroompic")) {
 911                 display_graphics_upload("the graphic for this room",
 912                                         "UIMG 0|_roompic_",
 913                                         "/editroompic");
 914         } else if (!strcasecmp(action, "editroompic")) {
 915                 do_graphics_upload("UIMG 1|_roompic_");
 916         } else if (!strcasecmp(action, "select_floor_to_edit_pic")) {
 917                 select_floor_to_edit_pic();
 918         } else if (!strcasecmp(action, "display_editfloorpic")) {
 919                 sprintf(buf, "UIMG 0|_floorpic_|%s",
 920                         bstr("which_floor"));
 921                 display_graphics_upload("the graphic for this floor",
 922                                         buf,
 923                                         "/editfloorpic");
 924         } else if (!strcasecmp(action, "editfloorpic")) {
 925                 sprintf(buf, "UIMG 1|_floorpic_|%s",
 926                         bstr("which_floor"));
 927                 do_graphics_upload(buf);
 928         } else if (!strcasecmp(action, "display_reg")) {
 929                 display_reg(0);
 930         } else if (!strcasecmp(action, "register")) {
 931                 register_user();
 932         } else if (!strcasecmp(action, "display_changepw")) {
 933                 display_changepw();
 934         } else if (!strcasecmp(action, "changepw")) {
 935                 changepw();
 936         } else if (!strcasecmp(action, "display_edit_node")) {
 937                 display_edit_node();
 938         } else if (!strcasecmp(action, "display_netconf")) {
 939                 display_netconf();
 940         } else if (!strcasecmp(action, "display_confirm_unshare")) {
 941                 display_confirm_unshare();
 942         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
 943                 display_confirm_delete_node();
 944         } else if (!strcasecmp(action, "delete_node")) {
 945                 delete_node();
 946         } else if (!strcasecmp(action, "unshare")) {
 947                 unshare();
 948         } else if (!strcasecmp(action, "display_add_node")) {
 949                 display_add_node();
 950         } else if (!strcasecmp(action, "add_node")) {
 951                 add_node();
 952         } else if (!strcasecmp(action, "display_share")) {
 953                 display_share();
 954         } else if (!strcasecmp(action, "share")) {
 955                 share();
 956         } else if (!strcasecmp(action, "terminate_session")) {
 957                 slrp_highest();
 958                 terminate_session();
 959         } else if (!strcasecmp(action, "edit_me")) {
 960                 edit_me();
 961         } else if (!strcasecmp(action, "display_siteconfig")) {
 962                 display_siteconfig();
 963         } else if (!strcasecmp(action, "page_popup")) {
 964                 page_popup();
 965         } else if (!strcasecmp(action, "siteconfig")) {
 966                 siteconfig();
 967         } else if (!strcasecmp(action, "display_generic")) {
 968                 display_generic();
 969         } else if (!strcasecmp(action, "do_generic")) {
 970                 do_generic();
 971         } else if (!strcasecmp(action, "display_menubar")) {
 972                 display_menubar(1);
 973         } else if (!strcasecmp(action, "output_mimepart")) {
 974                 output_mimepart();
 975         } else if (!strcasecmp(action, "diagnostics")) {
 976                 output_headers(1);
 977
 978                 wprintf("You're in session %d<HR>\n", WC->wc_session);
 979                 wprintf("Command: <BR><PRE>\n");
 980                 escputs(cmd);
 981                 wprintf("</PRE><HR>\n");
 982                 wprintf("Variables: <BR><PRE>\n");
 983                 dump_vars();
 984                 wprintf("</PRE><HR>\n");
 985                 wDumpContent(1);
 986         }
 987         /* When all else fais, display the main menu. */
 988         else {
 989                 display_main_menu();
 990         }
 991
 992 SKIP_ALL_THIS_CRAP:
 993         fflush(stdout);
 994         if (content != NULL) {
 995                 free(content);
 996                 content = NULL;
 997         }
 998         free_urls();
 999         if (WC->upload_length > 0) {
1000                 free(WC->upload);
1001                 WC->upload_length = 0;
1002         }
1003 }