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 "webserver.h"
  33 #include "mime_parser.h"
  34
  35 /*
  36  * String to unset the cookie.
  37  * Any date "in the past" will work, so I chose my birthday, right down to
  38  * the exact minute.  :)
  39  */
  40 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  41
  42 void unescape_input(char *buf)
  43 {
  44         int a, b;
  45         char hex[3];
  46
  47         while ((isspace(buf[strlen(buf) - 1])) && (strlen(buf) > 0))
  48                 buf[strlen(buf) - 1] = 0;
  49
  50         for (a = 0; a < strlen(buf); ++a) {
  51                 if (buf[a] == '+')
  52                         buf[a] = ' ';
  53                 if (buf[a] == '%') {
  54                         hex[0] = buf[a + 1];
  55                         hex[1] = buf[a + 2];
  56                         hex[2] = 0;
  57                         sscanf(hex, "%02x", &b);
  58                         buf[a] = (char) b;
  59                         strcpy(&buf[a + 1], &buf[a + 3]);
  60                 }
  61         }
  62
  63 }
  64
  65
  66 void addurls(char *url)
  67 {
  68         char *up, *ptr;
  69         char buf[SIZ];
  70         int a, b;
  71         struct urlcontent *u;
  72
  73         up = url;
  74         while (strlen(up) > 0) {
  75
  76                 /* locate the = sign */
  77                 strncpy(buf, up, 255);
  78                 b = (-1);
  79                 for (a = 255; a >= 0; --a)
  80                         if (buf[a] == '=')
  81                                 b = a;
  82                 if (b < 0)
  83                         return;
  84                 buf[b] = 0;
  85
  86                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
  87                 u->next = WC->urlstrings;
  88                 WC->urlstrings = u;
  89                 strcpy(u->url_key, buf);
  90
  91                 /* now chop that part off */
  92                 for (a = 0; a <= b; ++a)
  93                         ++up;
  94
  95                 /* locate the & sign */
  96                 ptr = up;
  97                 b = strlen(up);
  98                 for (a = 0; a < strlen(up); ++a) {
  99                         if (!strncmp(ptr, "&", 1)) {
 100                                 b = a;
 101                                 break;
 102                         }
 103                         ++ptr;
 104                 }
 105                 ptr = up;
 106                 for (a = 0; a < b; ++a)
 107                         ++ptr;
 108                 strcpy(ptr, "");
 109
 110                 u->url_data = malloc(strlen(up) + 1);
 111                 strcpy(u->url_data, up);
 112                 u->url_data[b] = 0;
 113                 unescape_input(u->url_data);
 114                 up = ptr;
 115                 ++up;
 116         }
 117 }
 118
 119 void free_urls(void)
 120 {
 121         struct urlcontent *u;
 122
 123         while (WC->urlstrings != NULL) {
 124                 free(WC->urlstrings->url_data);
 125                 u = WC->urlstrings->next;
 126                 free(WC->urlstrings);
 127                 WC->urlstrings = u;
 128         }
 129 }
 130
 131 /*
 132  * Diagnostic function to display the contents of all variables
 133  */
 134 void dump_vars(void)
 135 {
 136         struct urlcontent *u;
 137
 138         for (u = WC->urlstrings; u != NULL; u = u->next) {
 139                 wprintf("%38s = %s\n", u->url_key, u->url_data);
 140         }
 141 }
 142
 143 char *bstr(char *key)
 144 {
 145         struct urlcontent *u;
 146
 147         for (u = WC->urlstrings; u != NULL; u = u->next) {
 148                 if (!strcasecmp(u->url_key, key))
 149                         return (u->url_data);
 150         }
 151         return ("");
 152 }
 153
 154
 155 void wprintf(const char *format,...)
 156 {
 157         va_list arg_ptr;
 158         char wbuf[1024];
 159
 160         va_start(arg_ptr, format);
 161         vsprintf(wbuf, format, arg_ptr);
 162         va_end(arg_ptr);
 163
 164         write(WC->http_sock, wbuf, strlen(wbuf));
 165 }
 166
 167
 168 /*
 169  * wDumpContent() wraps up an HTTP session, closes tags, etc.
 170  *
 171  * print_standard_html_footer should be set to 0 to transmit only, 1 to
 172  * append the main menu and closing tags, or 2 to
 173  * append the closing tags only.
 174  */
 175 void wDumpContent(int print_standard_html_footer)
 176 {
 177         if (WC->fake_frames) {
 178                 wprintf("</TABLE>\n");
 179                 WC->fake_frames = 0;
 180         }
 181
 182         if (print_standard_html_footer) {
 183                 if (print_standard_html_footer != 2) {
 184                         wprintf("<BR>");
 185                 }
 186                 wprintf("</BODY></HTML>\n");
 187         }
 188
 189
 190 }
 191
 192
 193 /*
 194  * Copy a string, escaping characters which have meaning in HTML.  If
 195  * nbsp is nonzero, spaces are converted to non-breaking spaces.
 196  */
 197 void stresc(char *target, char *strbuf, int nbsp)
 198 {
 199         int a;
 200         strcpy(target, "");
 201
 202         for (a = 0; a < strlen(strbuf); ++a) {
 203                 if (strbuf[a] == '<')
 204                         strcat(target, "&lt;");
 205                 else if (strbuf[a] == '>')
 206                         strcat(target, "&gt;");
 207                 else if (strbuf[a] == '&')
 208                         strcat(target, "&amp;");
 209                 else if (strbuf[a] == '\"')
 210                         strcat(target, "&quot;");
 211                 else if (strbuf[a] == '\'')
 212                         strcat(target, "&#39;");
 213                 else if (strbuf[a] == LB)
 214                         strcat(target, "<");
 215                 else if (strbuf[a] == RB)
 216                         strcat(target, ">");
 217                 else if (strbuf[a] == QU)
 218                         strcat(target, "\"");
 219                 else if ((strbuf[a] == 32) && (nbsp == 1)) {
 220                         strcat(target, "&nbsp;");
 221                 } else {
 222                         strncat(target, &strbuf[a], 1);
 223                 }
 224         }
 225 }
 226
 227 void escputs1(char *strbuf, int nbsp)
 228 {
 229         char buf[1024];
 230         stresc(buf, strbuf, nbsp);
 231         wprintf("%s", buf);
 232 }
 233
 234 void escputs(char *strbuf)
 235 {
 236         escputs1(strbuf, 0);
 237 }
 238
 239 /*
 240  * Escape a string for feeding out as a URL.
 241  * Returns a pointer to a buffer that must be freed by the caller!
 242  */
 243 void urlesc(char *outbuf, char *strbuf)
 244 {
 245         int a, b, c;
 246         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 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 }
 263
 264 void urlescputs(char *strbuf)
 265 {
 266         char outbuf[SIZ];
 267
 268         urlesc(outbuf, strbuf);
 269         wprintf("%s", outbuf);
 270 }
 271
 272
 273
 274
 275 /*
 276  * Output all that important stuff that the browser will want to see
 277  *
 278  * control codes:
 279  *
 280  * Bits 0 and 1:
 281  * 0 = Nothing.  Do not display any leading HTTP or HTML.
 282  * 1 = HTTP headers plus the room banner
 283  * 2 = HTTP headers required to terminate the session (unset cookies)
 284  * 3 = HTTP and HTML headers, but no room banner
 285  *
 286  * Bit 2: Set to 1 to auto-refresh page every 30 seconds
 287  *
 288  * Bit 3: suppress check for express messages
 289  */
 290 void output_headers(int controlcode)
 291 {
 292         char cookie[SIZ];
 293         int print_standard_html_head = 0;
 294         int refresh30 = 0;
 295         int suppress_check = 0;
 296         char httpnow[SIZ];
 297         static int pageseq = 0;
 298
 299         print_standard_html_head        =       controlcode & 0x03;
 300         refresh30                       =       ((controlcode & 0x04) >> 2);
 301         suppress_check                  =       ((controlcode & 0x08) >> 3);
 302
 303         wprintf("HTTP/1.0 200 OK\n");
 304
 305         httpdate(httpnow, time(NULL));
 306
 307         if (print_standard_html_head > 0) {
 308                 wprintf("Content-type: text/html\n");
 309                 wprintf("Server: %s\n", SERVER);
 310                 wprintf("Connection: close\n");
 311                 wprintf("Pragma: no-cache\n");
 312                 wprintf("Cache-Control: no-store\n");
 313         }
 314         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 315                         WC->wc_password, WC->wc_roomname);
 316         if (print_standard_html_head == 2) {
 317                 wprintf("Set-cookie: webcit=%s\n", unset);
 318         } else {
 319                 wprintf("Set-cookie: webcit=%s\n", cookie);
 320                 if (server_cookie != NULL) {
 321                         wprintf("%s\n", server_cookie);
 322                 }
 323         }
 324
 325         if (print_standard_html_head > 0) {
 326                 wprintf("\n");
 327                 wprintf("<HTML><HEAD><TITLE>");
 328                 escputs(serv_info.serv_humannode);
 329                 wprintf("</TITLE>\n"
 330                         "<META HTTP-EQUIV=\"Pragma\" CONTENT=\"no-cache\">\n"
 331                         "<META HTTP-EQUIV=\"expired\" CONTENT=\"28-May-1971 18:10:00 GMT\">\n"
 332                         "<META NAME=\"MSSmartTagsPreventParsing\" CONTENT=\"TRUE\">\n");
 333                 if (refresh30) wprintf(
 334                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"30\">\n");
 335                 else wprintf(
 336                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"500363689;\">\n");
 337                 wprintf("</HEAD>\n");
 338
 339                 /* script for checking for pages (not always launched) */
 340                 wprintf("<SCRIPT LANGUAGE=\"JavaScript\">\n");
 341                 wprintf("function launch_page_popup() {\n");
 342                 wprintf("pwin = window.open('/page_popup', 'CitaPage%d', "
 343                         "'toolbar=no,location=no,copyhistory=no,status=no,"
 344                         "scrollbars=yes,resizable=no,height=250,width=400');\n",
 345                         ++pageseq);
 346                 wprintf("}\n");
 347                 wprintf("</SCRIPT>\n");
 348                 /* end script */
 349
 350                 /* (JavaScript keyboard-based navigation would go here) */
 351
 352                 if (!suppress_check) if (WC->HaveExpressMessages) {
 353                         svprintf("extrabodyparms", WCS_STRING, "%s",
 354                                 "onload=\"launch_page_popup()\" ");
 355                         WC->HaveExpressMessages = 0;
 356                 }
 357                 do_template("background.html");
 358                 clear_local_substs();
 359
 360         if (print_standard_html_head == 1) {
 361                 wprintf("<A NAME=\"TheTop\"></A>");
 362
 363                 wprintf("<TABLE border=0 width=100%%><TR VALIGN=TOP>"
 364                         "<TD>\n");
 365
 366                 embed_room_banner(NULL);
 367
 368                 wprintf("</TD></TR><TR VALIGN=TOP><TD>\n");
 369
 370                 WC->fake_frames = 1;
 371                 }
 372         }
 373 }
 374
 375
 376 /*
 377  *
 378  */
 379 void http_redirect(char *whichpage) {
 380         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 381         wprintf("Location: %s\n", whichpage);
 382         wprintf("URI: %s\n", whichpage);
 383         wprintf("Content-type: text/html\n\n");
 384         wprintf("<html><body>\n");
 385         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 386                 whichpage);
 387         wprintf("</body></html>\n");
 388 }
 389
 390
 391
 392 void check_for_express_messages()
 393 {
 394         char buf[SIZ];
 395
 396         serv_puts("NOOP");
 397         serv_gets(buf);
 398         if (buf[3] == '*') WC->HaveExpressMessages = 1;
 399 }
 400
 401
 402
 403
 404 void output_static(char *what)
 405 {
 406         char buf[4096];
 407         FILE *fp;
 408         struct stat statbuf;
 409         off_t bytes;
 410         char *bigbuffer;
 411
 412         sprintf(buf, "static/%s", what);
 413         fp = fopen(buf, "rb");
 414         if (fp == NULL) {
 415                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 416                 wprintf("Content-Type: text/plain\n");
 417                 wprintf("\n");
 418                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 419         } else {
 420                 output_headers(0);
 421
 422                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 423                         wprintf("Content-type: image/gif\n");
 424                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 425                         wprintf("Content-type: text/plain\n");
 426                 else if (!strncasecmp(&what[strlen(what) - 4], ".css", 4))
 427                         wprintf("Content-type: text/css\n");
 428                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 429                         wprintf("Content-type: image/jpeg\n");
 430                 else if (!strncasecmp(&what[strlen(what) - 4], ".png", 4))
 431                         wprintf("Content-type: image/png\n");
 432                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 433                         wprintf("Content-type: text/html\n");
 434                 else
 435                         wprintf("Content-type: application/octet-stream\n");
 436
 437                 fstat(fileno(fp), &statbuf);
 438                 bytes = statbuf.st_size;
 439                 lprintf(5, "Static: %s, %ld bytes\n", what, bytes);
 440                 wprintf("Content-length: %ld\n", (long) bytes);
 441                 wprintf("\n");
 442                 bigbuffer = malloc(bytes);
 443                 fread(bigbuffer, bytes, 1, fp);
 444                 fclose(fp);
 445                 write(WC->http_sock, bigbuffer, bytes);
 446                 free(bigbuffer);
 447         }
 448         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 449                 end_webcit_session();
 450         }
 451 }
 452
 453
 454 /*
 455  * When the browser requests an image file from the Citadel server,
 456  * this function is called to transmit it.
 457  */
 458 void output_image()
 459 {
 460         char buf[SIZ];
 461         char xferbuf[4096];
 462         off_t bytes;
 463         off_t thisblock;
 464         off_t accomplished = 0L;
 465
 466
 467         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 468         serv_gets(buf);
 469         if (buf[0] == '2') {
 470                 bytes = extract_long(&buf[4], 0);
 471                 output_headers(0);
 472                 wprintf("Content-type: image/gif\n");
 473                 wprintf("Content-length: %ld\n", (long) bytes);
 474                 wprintf("\n");
 475
 476                 while (bytes > (off_t) 0) {
 477                         thisblock = (off_t) sizeof(xferbuf);
 478                         if (thisblock > bytes) {
 479                                 thisblock = bytes;
 480                         }
 481                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 482                         serv_gets(buf);
 483                         if (buf[0] == '6') {
 484                                 thisblock = extract_long(&buf[4], 0);
 485                                 serv_read(xferbuf, (int) thisblock);
 486                         }
 487                         else {
 488                                 memset(xferbuf, 0, thisblock);
 489                         }
 490                         write(WC->http_sock, xferbuf, thisblock);
 491                         bytes = bytes - thisblock;
 492                         accomplished = accomplished + thisblock;
 493                 }
 494                 serv_puts("CLOS");
 495                 serv_gets(buf);
 496         } else {
 497                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 498                 output_headers(0);
 499                 wprintf("Content-Type: text/plain\n");
 500                 wprintf("\n");
 501                 wprintf("Error retrieving image: %s\n", &buf[4]);
 502         }
 503
 504 }
 505
 506 /*
 507  */
 508 void output_mimepart()
 509 {
 510         char buf[SIZ];
 511         char xferbuf[4096];
 512         off_t bytes;
 513         off_t thisblock;
 514         off_t accomplished = 0L;
 515         char content_type[SIZ];
 516
 517         serv_printf("OPNA %s|%s", bstr("msgnum"), bstr("partnum"));
 518         serv_gets(buf);
 519         if (buf[0] == '2') {
 520                 bytes = extract_long(&buf[4], 0);
 521                 extract(content_type, &buf[4], 3);
 522                 output_headers(0);
 523                 wprintf("Content-type: %s\n", content_type);
 524                 wprintf("Content-length: %ld\n", (long) bytes);
 525                 wprintf("\n");
 526
 527                 while (bytes > (off_t) 0) {
 528                         thisblock = (off_t) sizeof(xferbuf);
 529                         if (thisblock > bytes) {
 530                                 thisblock = bytes;
 531                         }
 532                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 533                         serv_gets(buf);
 534                         if (buf[0] == '6') {
 535                                 thisblock = extract_long(&buf[4], 0);
 536                                 serv_read(xferbuf, (int) thisblock);
 537                         }
 538                         else {
 539                                 memset(xferbuf, 0, thisblock);
 540                         }
 541                         write(WC->http_sock, xferbuf, thisblock);
 542                         bytes = bytes - thisblock;
 543                         accomplished = accomplished + thisblock;
 544                 }
 545                 serv_puts("CLOS");
 546                 serv_gets(buf);
 547         } else {
 548                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 549                 output_headers(0);
 550                 wprintf("Content-Type: text/plain\n");
 551                 wprintf("\n");
 552                 wprintf("Error retrieving part: %s\n", &buf[4]);
 553         }
 554
 555 }
 556
 557
 558 /*
 559  * Convenience functions to display a page containing only a string
 560  */
 561 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 562 {
 563         wprintf("HTTP/1.0 200 OK\n");
 564         output_headers(1);
 565         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
 566         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 567         wprintf("<B>%s</B>\n", titlebarmsg);
 568         wprintf("</FONT></TD></TR></TABLE><BR>\n");
 569         escputs(messagetext);
 570
 571         wprintf("<HR>\n");
 572         wDumpContent(1);
 573 }
 574
 575
 576 /*
 577  * Display a blank page.
 578  */
 579 void blank_page(void) {
 580         output_headers(7);
 581         wDumpContent(2);
 582 }
 583
 584
 585 void display_error(char *errormessage)
 586 {
 587         convenience_page("770000", "Error", errormessage);
 588 }
 589
 590 void display_success(char *successmessage)
 591 {
 592         convenience_page("007700", "OK", successmessage);
 593 }
 594
 595
 596
 597 void extract_action(char *actbuf, char *cmdbuf)
 598 {
 599         int i;
 600
 601         strcpy(actbuf, cmdbuf);
 602         if (!strncasecmp(actbuf, "GET /", 5))
 603                 strcpy(actbuf, &actbuf[5]);
 604         if (!strncasecmp(actbuf, "PUT /", 5))
 605                 strcpy(actbuf, &actbuf[5]);
 606         if (!strncasecmp(actbuf, "POST /", 6))
 607                 strcpy(actbuf, &actbuf[6]);
 608
 609         for (i = 0; i < strlen(actbuf); ++i) {
 610                 if (actbuf[i] == ' ') {
 611                         actbuf[i] = 0;
 612                         i = 0;
 613                 }
 614                 if (actbuf[i] == '/') {
 615                         actbuf[i] = 0;
 616                         i = 0;
 617                 }
 618                 if (actbuf[i] == '?') {
 619                         actbuf[i] = 0;
 620                         i = 0;
 621                 }
 622                 if (actbuf[i] == '&') {
 623                         actbuf[i] = 0;
 624                         i = 0;
 625                 }
 626         }
 627 }
 628
 629
 630 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 631                         void *content, char *cbtype, size_t length,
 632                         char *encoding, void *userdata)
 633 {
 634
 635         lprintf(9, "UPLOAD HANDLER CALLED\n");
 636         lprintf(9, "    name = %s\n", name);
 637         lprintf(9, "filename = %s\n", filename);
 638         lprintf(9, "encoding = %s\n", encoding);
 639         lprintf(9, "    type = %s\n", cbtype);
 640         lprintf(9, "  length = %ld\n", (long)length);
 641
 642         if (length > 0) {
 643                 WC->upload = malloc(length);
 644                 if (WC->upload != NULL) {
 645                         WC->upload_length = length;
 646                         memcpy(WC->upload, content, length);
 647                 }
 648                 else {
 649                         lprintf(1, "malloc() failed: %s\n",
 650                                 strerror(errno));
 651                 }
 652         }
 653 }
 654
 655
 656 /*
 657  * Entry point for WebCit transaction
 658  */
 659 void session_loop(struct httprequest *req)
 660 {
 661         char cmd[SIZ];
 662         char action[SIZ];
 663         char buf[SIZ];
 664         int a, b;
 665         int ContentLength = 0;
 666         int BytesRead;
 667         char ContentType[512];
 668         char *content;
 669         char *content_end;
 670         struct httprequest *hptr;
 671         char browser_host[SIZ];
 672         char user_agent[SIZ];
 673
 674         /* We stuff these with the values coming from the client cookies,
 675          * so we can use them to reconnect a timed out session if we have to.
 676          */
 677         char c_host[SIZ];
 678         char c_port[SIZ];
 679         char c_username[SIZ];
 680         char c_password[SIZ];
 681         char c_roomname[SIZ];
 682         char cookie[SIZ];
 683
 684         strcpy(c_host, defaulthost);
 685         strcpy(c_port, defaultport);
 686         strcpy(c_username, "");
 687         strcpy(c_password, "");
 688         strcpy(c_roomname, "");
 689
 690         WC->upload_length = 0;
 691         WC->upload = NULL;
 692
 693         hptr = req;
 694         if (hptr == NULL) return;
 695
 696         strcpy(cmd, hptr->line);
 697         hptr = hptr->next;
 698         extract_action(action, cmd);
 699
 700         while (hptr != NULL) {
 701                 strcpy(buf, hptr->line);
 702                 hptr = hptr->next;
 703
 704                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 705                         strcpy(cookie, &buf[15]);
 706                         cookie_to_stuff(cookie, NULL,
 707                                       c_username, c_password, c_roomname);
 708                 }
 709                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 710                         ContentLength = atoi(&buf[16]);
 711                 }
 712                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 713                         strcpy(ContentType, &buf[14]);
 714                 }
 715                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 716                         strcpy(user_agent, &buf[12]);
 717                 }
 718         }
 719
 720         if (ContentLength > 0) {
 721                 lprintf(5, "Content length: %d\n", ContentLength);
 722                 content = malloc(ContentLength + 1);
 723                 memset(content, 0, ContentLength+1);
 724                 BytesRead = 0;
 725
 726                 while (BytesRead < ContentLength) {
 727                         a=read(WC->http_sock, &content[BytesRead],
 728                                 ContentLength - BytesRead);
 729                         if (a <= 0) BytesRead = ContentLength;
 730                         else BytesRead += a;
 731                 }
 732
 733                 if (!strncasecmp(ContentType,
 734                               "application/x-www-form-urlencoded", 33)) {
 735                         addurls(content);
 736                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 737                         content_end = content + ContentLength;
 738                         mime_parser(content, content_end, *upload_handler,
 739                                         NULL, NULL, NULL, 0);
 740                 }
 741         } else {
 742                 content = NULL;
 743         }
 744
 745         /* If there are variables in the URL, we must grab them now */
 746         for (a = 0; a < strlen(cmd); ++a)
 747                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 748                         for (b = a; b < strlen(cmd); ++b)
 749                                 if (isspace(cmd[b]))
 750                                         cmd[b] = 0;
 751                         addurls(&cmd[a + 1]);
 752                         cmd[a] = 0;
 753                 }
 754         /*
 755          * If we're not connected to a Citadel server, try to hook up the
 756          * connection now.  Preference is given to the host and port specified
 757          * by browser cookies, if cookies have been supplied.
 758          */
 759         if (!WC->connected) {
 760                 if (strlen(bstr("host")) > 0)
 761                         strcpy(c_host, bstr("host"));
 762                 if (strlen(bstr("port")) > 0)
 763                         strcpy(c_port, bstr("port"));
 764
 765                 if (!strcasecmp(c_host, "uds")) {
 766                         /* unix domain socket */
 767                         sprintf(buf, "%s/citadel.socket", c_port);
 768                         WC->serv_sock = uds_connectsock(buf);
 769                 }
 770                 else {
 771                         /* tcp socket */
 772                         WC->serv_sock = tcp_connectsock(c_host, c_port);
 773                 }
 774
 775                 if (WC->serv_sock < 0) {
 776                         do_logout();
 777                         goto SKIP_ALL_THIS_CRAP;
 778                 }
 779                 else {
 780                         WC->connected = 1;
 781                         serv_gets(buf); /* get the server welcome message */
 782                         locate_host(browser_host, WC->http_sock);
 783                         get_serv_info(browser_host, user_agent);
 784                 }
 785         }
 786
 787         check_for_express_messages();
 788
 789         /*
 790          * If we're not logged in, but we have username and password cookies
 791          * supplied by the browser, try using them to log in.
 792          */
 793         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 794                 serv_printf("USER %s", c_username);
 795                 serv_gets(buf);
 796                 if (buf[0] == '3') {
 797                         serv_printf("PASS %s", c_password);
 798                         serv_gets(buf);
 799                         if (buf[0] == '2') {
 800                                 become_logged_in(c_username, c_password, buf);
 801                         }
 802                 }
 803         }
 804         /*
 805          * If we don't have a current room, but a cookie specifying the
 806          * current room is supplied, make an effort to go there.
 807          */
 808         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 809                 serv_printf("GOTO %s", c_roomname);
 810                 serv_gets(buf);
 811                 if (buf[0] == '2') {
 812                         strcpy(WC->wc_roomname, c_roomname);
 813                 }
 814         }
 815         if (!strcasecmp(action, "static")) {
 816                 strcpy(buf, &cmd[12]);
 817                 for (a = 0; a < strlen(buf); ++a)
 818                         if (isspace(buf[a]))
 819                                 buf[a] = 0;
 820                 output_static(buf);
 821         } else if (!strcasecmp(action, "image")) {
 822                 output_image();
 823         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
 824                 do_login();
 825         } else if (!WC->logged_in) {
 826                 display_login(NULL);
 827         }
 828         /* Various commands... */
 829
 830         else if (!strcasecmp(action, "do_welcome")) {
 831                 do_welcome();
 832         } else if (!strcasecmp(action, "blank")) {
 833                 blank_page();
 834         } else if (!strcasecmp(action, "display_main_menu")) {
 835                 display_main_menu();
 836         } else if (!strcasecmp(action, "whobbs")) {
 837                 whobbs();
 838         } else if (!strcasecmp(action, "knrooms")) {
 839                 list_all_rooms_by_floor();
 840         } else if (!strcasecmp(action, "gotonext")) {
 841                 slrp_highest();
 842                 gotonext();
 843         } else if (!strcasecmp(action, "skip")) {
 844                 gotonext();
 845         } else if (!strcasecmp(action, "ungoto")) {
 846                 ungoto();
 847         } else if (!strcasecmp(action, "dotgoto")) {
 848                 slrp_highest();
 849                 smart_goto(bstr("room"));
 850         } else if (!strcasecmp(action, "dotskip")) {
 851                 smart_goto(bstr("room"));
 852         } else if (!strcasecmp(action, "termquit")) {
 853                 do_logout();
 854         } else if (!strcasecmp(action, "readnew")) {
 855                 readloop("readnew");
 856         } else if (!strcasecmp(action, "readold")) {
 857                 readloop("readold");
 858         } else if (!strcasecmp(action, "readfwd")) {
 859                 readloop("readfwd");
 860         } else if (!strcasecmp(action, "headers")) {
 861                 readloop("headers");
 862         } else if (!strcasecmp(action, "display_enter")) {
 863                 display_enter();
 864         } else if (!strcasecmp(action, "post")) {
 865                 post_message();
 866         } else if (!strcasecmp(action, "delete_msg")) {
 867                 delete_msg();
 868         } else if (!strcasecmp(action, "confirm_move_msg")) {
 869                 confirm_move_msg();
 870         } else if (!strcasecmp(action, "move_msg")) {
 871                 move_msg();
 872         } else if (!strcasecmp(action, "userlist")) {
 873                 userlist();
 874         } else if (!strcasecmp(action, "showuser")) {
 875                 showuser();
 876         } else if (!strcasecmp(action, "display_page")) {
 877                 display_page();
 878         } else if (!strcasecmp(action, "page_user")) {
 879                 page_user();
 880         } else if (!strcasecmp(action, "chat")) {
 881                 do_chat();
 882         } else if (!strcasecmp(action, "display_private")) {
 883                 display_private("", 0);
 884         } else if (!strcasecmp(action, "goto_private")) {
 885                 goto_private();
 886         } else if (!strcasecmp(action, "zapped_list")) {
 887                 zapped_list();
 888         } else if (!strcasecmp(action, "display_zap")) {
 889                 display_zap();
 890         } else if (!strcasecmp(action, "zap")) {
 891                 zap();
 892         } else if (!strcasecmp(action, "display_entroom")) {
 893                 display_entroom();
 894         } else if (!strcasecmp(action, "entroom")) {
 895                 entroom();
 896         } else if (!strcasecmp(action, "display_editroom")) {
 897                 display_editroom();
 898         } else if (!strcasecmp(action, "netedit")) {
 899                 netedit();
 900         } else if (!strcasecmp(action, "editroom")) {
 901                 editroom();
 902         } else if (!strcasecmp(action, "display_whok")) {
 903                 display_whok();
 904         } else if (!strcasecmp(action, "display_editinfo")) {
 905                 display_edit("Room info", "EINF 0", "RINF", "/editinfo");
 906         } else if (!strcasecmp(action, "editinfo")) {
 907                 save_edit("Room info", "EINF 1", 1);
 908         } else if (!strcasecmp(action, "display_editbio")) {
 909                 sprintf(buf, "RBIO %s", WC->wc_username);
 910                 display_edit("Your bio", "NOOP", buf, "editbio");
 911         } else if (!strcasecmp(action, "editbio")) {
 912                 save_edit("Your bio", "EBIO", 0);
 913         } else if (!strcasecmp(action, "confirm_delete_room")) {
 914                 confirm_delete_room();
 915         } else if (!strcasecmp(action, "delete_room")) {
 916                 delete_room();
 917         } else if (!strcasecmp(action, "validate")) {
 918                 validate();
 919         } else if (!strcasecmp(action, "display_editpic")) {
 920                 display_graphics_upload("your photo",
 921                                         "UIMG 0|_userpic_",
 922                                         "/editpic");
 923         } else if (!strcasecmp(action, "editpic")) {
 924                 do_graphics_upload("UIMG 1|_userpic_");
 925         } else if (!strcasecmp(action, "display_editroompic")) {
 926                 display_graphics_upload("the graphic for this room",
 927                                         "UIMG 0|_roompic_",
 928                                         "/editroompic");
 929         } else if (!strcasecmp(action, "editroompic")) {
 930                 do_graphics_upload("UIMG 1|_roompic_");
 931         } else if (!strcasecmp(action, "select_floor_to_edit_pic")) {
 932                 select_floor_to_edit_pic();
 933         } else if (!strcasecmp(action, "display_editfloorpic")) {
 934                 sprintf(buf, "UIMG 0|_floorpic_|%s",
 935                         bstr("which_floor"));
 936                 display_graphics_upload("the graphic for this floor",
 937                                         buf,
 938                                         "/editfloorpic");
 939         } else if (!strcasecmp(action, "editfloorpic")) {
 940                 sprintf(buf, "UIMG 1|_floorpic_|%s",
 941                         bstr("which_floor"));
 942                 do_graphics_upload(buf);
 943         } else if (!strcasecmp(action, "display_reg")) {
 944                 display_reg(0);
 945         } else if (!strcasecmp(action, "register")) {
 946                 register_user();
 947         } else if (!strcasecmp(action, "display_changepw")) {
 948                 display_changepw();
 949         } else if (!strcasecmp(action, "changepw")) {
 950                 changepw();
 951         } else if (!strcasecmp(action, "display_edit_node")) {
 952                 display_edit_node();
 953         } else if (!strcasecmp(action, "edit_node")) {
 954                 edit_node();
 955         } else if (!strcasecmp(action, "display_netconf")) {
 956                 display_netconf();
 957         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
 958                 display_confirm_delete_node();
 959         } else if (!strcasecmp(action, "delete_node")) {
 960                 delete_node();
 961         } else if (!strcasecmp(action, "display_add_node")) {
 962                 display_add_node();
 963         } else if (!strcasecmp(action, "add_node")) {
 964                 add_node();
 965         } else if (!strcasecmp(action, "terminate_session")) {
 966                 slrp_highest();
 967                 terminate_session();
 968         } else if (!strcasecmp(action, "edit_me")) {
 969                 edit_me();
 970         } else if (!strcasecmp(action, "display_siteconfig")) {
 971                 display_siteconfig();
 972         } else if (!strcasecmp(action, "page_popup")) {
 973                 page_popup();
 974         } else if (!strcasecmp(action, "siteconfig")) {
 975                 siteconfig();
 976         } else if (!strcasecmp(action, "display_generic")) {
 977                 display_generic();
 978         } else if (!strcasecmp(action, "do_generic")) {
 979                 do_generic();
 980         } else if (!strcasecmp(action, "display_menubar")) {
 981                 display_menubar(1);
 982         } else if (!strcasecmp(action, "output_mimepart")) {
 983                 output_mimepart();
 984         } else if (!strcasecmp(action, "diagnostics")) {
 985                 output_headers(1);
 986
 987                 wprintf("You're in session %d<HR>\n", WC->wc_session);
 988                 wprintf("Command: <BR><PRE>\n");
 989                 escputs(cmd);
 990                 wprintf("</PRE><HR>\n");
 991                 wprintf("Variables: <BR><PRE>\n");
 992                 dump_vars();
 993                 wprintf("</PRE><HR>\n");
 994                 wDumpContent(1);
 995         }
 996         /* When all else fais, display the main menu. */
 997         else {
 998                 display_main_menu();
 999         }
1000
1001 SKIP_ALL_THIS_CRAP:
1002         fflush(stdout);
1003         if (content != NULL) {
1004                 free(content);
1005                 content = NULL;
1006         }
1007         free_urls();
1008         if (WC->upload_length > 0) {
1009                 free(WC->upload);
1010                 WC->upload_length = 0;
1011         }
1012 }