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  * 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[SIZ];
 291         int print_standard_html_head = 0;
 292         int refresh30 = 0;
 293         int suppress_check = 0;
 294         char httpnow[SIZ];
 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                 if (server_cookie != NULL) {
 319                         wprintf("%s\n", server_cookie);
 320                 }
 321         }
 322
 323         if (print_standard_html_head > 0) {
 324                 wprintf("\n");
 325                 wprintf("<HTML><HEAD><TITLE>");
 326                 escputs(serv_info.serv_humannode);
 327                 wprintf("</TITLE>\n"
 328                         "<META HTTP-EQUIV=\"Pragma\" CONTENT=\"no-cache\">\n"
 329                         "<META HTTP-EQUIV=\"expired\" CONTENT=\"28-May-1971 18:10:00 GMT\">\n"
 330                         "<META NAME=\"MSSmartTagsPreventParsing\" CONTENT=\"TRUE\">\n");
 331                 if (refresh30) wprintf(
 332                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"30\">\n");
 333                 else wprintf(
 334                         "<META HTTP-EQUIV=\"refresh\" CONTENT=\"500363689;\">\n");
 335                 wprintf("</HEAD>\n");
 336
 337                 /* script for checking for pages (not always launched) */
 338                 wprintf("<SCRIPT LANGUAGE=\"JavaScript\">\n");
 339                 wprintf("function launch_page_popup() {\n");
 340                 wprintf("pwin = window.open('/page_popup', 'CitaPage%d', "
 341                         "'toolbar=no,location=no,copyhistory=no,status=no,"
 342                         "scrollbars=yes,resizable=no,height=150,width=400');\n",
 343                         ++pageseq);
 344                 wprintf("}\n");
 345                 wprintf("</SCRIPT>\n");
 346                 /* end script */
 347
 348                 /* (JavaScript keyboard-based navigation would go here) */
 349
 350                 if (!suppress_check) if (WC->HaveExpressMessages) {
 351                         svprintf("extrabodyparms", WCS_STRING, "%s",
 352                                 "onload=\"launch_page_popup()\" ");
 353                         WC->HaveExpressMessages = 0;
 354                 }
 355                 do_template("background.html");
 356                 clear_local_substs();
 357
 358         if (print_standard_html_head == 1) {
 359                 wprintf("<A NAME=\"TheTop\"></A>");
 360
 361                 wprintf("<TABLE border=0 width=100%%><TR VALIGN=TOP>"
 362                         "<TD>\n");
 363
 364                 embed_room_banner(NULL);
 365
 366                 wprintf("</TD></TR><TR VALIGN=TOP><TD>\n");
 367
 368                 WC->fake_frames = 1;
 369                 }
 370         }
 371 }
 372
 373
 374 /*
 375  *
 376  */
 377 void http_redirect(char *whichpage) {
 378         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 379         wprintf("Location: %s\n", whichpage);
 380         wprintf("URI: %s\n", whichpage);
 381         wprintf("Content-type: text/html\n\n");
 382         wprintf("<html><body>\n");
 383         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 384                 whichpage);
 385         wprintf("</body></html>\n");
 386 }
 387
 388
 389
 390 void check_for_express_messages()
 391 {
 392         char buf[SIZ];
 393
 394         serv_puts("NOOP");
 395         serv_gets(buf);
 396         if (buf[3] == '*') WC->HaveExpressMessages = 1;
 397 }
 398
 399
 400
 401
 402 void output_static(char *what)
 403 {
 404         char buf[4096];
 405         FILE *fp;
 406         struct stat statbuf;
 407         off_t bytes;
 408         char *bigbuffer;
 409
 410         sprintf(buf, "static/%s", what);
 411         fp = fopen(buf, "rb");
 412         if (fp == NULL) {
 413                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 414                 wprintf("Content-Type: text/plain\n");
 415                 wprintf("\n");
 416                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 417         } else {
 418                 output_headers(0);
 419
 420                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 421                         wprintf("Content-type: image/gif\n");
 422                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 423                         wprintf("Content-type: text/plain\n");
 424                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 425                         wprintf("Content-type: image/jpeg\n");
 426                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 427                         wprintf("Content-type: text/html\n");
 428                 else
 429                         wprintf("Content-type: application/octet-stream\n");
 430
 431                 fstat(fileno(fp), &statbuf);
 432                 bytes = statbuf.st_size;
 433                 fprintf(stderr, "Static: %s, %ld bytes\n", what, bytes);
 434                 wprintf("Content-length: %ld\n", (long) bytes);
 435                 wprintf("\n");
 436                 bigbuffer = malloc(bytes);
 437                 fread(bigbuffer, bytes, 1, fp);
 438                 fclose(fp);
 439                 write(WC->http_sock, bigbuffer, bytes);
 440                 free(bigbuffer);
 441         }
 442         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 443                 end_webcit_session();
 444         }
 445 }
 446
 447
 448 /*
 449  * When the browser requests an image file from the Citadel server,
 450  * this function is called to transmit it.
 451  */
 452 void output_image()
 453 {
 454         char buf[SIZ];
 455         char xferbuf[4096];
 456         off_t bytes;
 457         off_t thisblock;
 458         off_t accomplished = 0L;
 459
 460
 461         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 462         serv_gets(buf);
 463         if (buf[0] == '2') {
 464                 bytes = extract_long(&buf[4], 0);
 465                 output_headers(0);
 466                 wprintf("Content-type: image/gif\n");
 467                 wprintf("Content-length: %ld\n", (long) bytes);
 468                 wprintf("\n");
 469
 470                 while (bytes > (off_t) 0) {
 471                         thisblock = (off_t) sizeof(xferbuf);
 472                         if (thisblock > bytes) {
 473                                 thisblock = bytes;
 474                         }
 475                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 476                         serv_gets(buf);
 477                         if (buf[0] == '6') {
 478                                 thisblock = extract_long(&buf[4], 0);
 479                                 serv_read(xferbuf, (int) thisblock);
 480                         }
 481                         else {
 482                                 memset(xferbuf, 0, thisblock);
 483                         }
 484                         write(WC->http_sock, xferbuf, thisblock);
 485                         bytes = bytes - thisblock;
 486                         accomplished = accomplished + thisblock;
 487                 }
 488                 serv_puts("CLOS");
 489                 serv_gets(buf);
 490         } else {
 491                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 492                 output_headers(0);
 493                 wprintf("Content-Type: text/plain\n");
 494                 wprintf("\n");
 495                 wprintf("Error retrieving image: %s\n", &buf[4]);
 496         }
 497
 498 }
 499
 500 /*
 501  */
 502 void output_mimepart()
 503 {
 504         char buf[SIZ];
 505         char xferbuf[4096];
 506         off_t bytes;
 507         off_t thisblock;
 508         off_t accomplished = 0L;
 509         char content_type[SIZ];
 510
 511         serv_printf("OPNA %s|%s", bstr("msgnum"), bstr("partnum"));
 512         serv_gets(buf);
 513         if (buf[0] == '2') {
 514                 bytes = extract_long(&buf[4], 0);
 515                 extract(content_type, &buf[4], 3);
 516                 output_headers(0);
 517                 wprintf("Content-type: %s\n", content_type);
 518                 wprintf("Content-length: %ld\n", (long) bytes);
 519                 wprintf("\n");
 520
 521                 while (bytes > (off_t) 0) {
 522                         thisblock = (off_t) sizeof(xferbuf);
 523                         if (thisblock > bytes) {
 524                                 thisblock = bytes;
 525                         }
 526                         serv_printf("READ %ld|%ld", accomplished, thisblock);
 527                         serv_gets(buf);
 528                         if (buf[0] == '6') {
 529                                 thisblock = extract_long(&buf[4], 0);
 530                                 serv_read(xferbuf, (int) thisblock);
 531                         }
 532                         else {
 533                                 memset(xferbuf, 0, thisblock);
 534                         }
 535                         write(WC->http_sock, xferbuf, thisblock);
 536                         bytes = bytes - thisblock;
 537                         accomplished = accomplished + thisblock;
 538                 }
 539                 serv_puts("CLOS");
 540                 serv_gets(buf);
 541         } else {
 542                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 543                 output_headers(0);
 544                 wprintf("Content-Type: text/plain\n");
 545                 wprintf("\n");
 546                 wprintf("Error retrieving part: %s\n", &buf[4]);
 547         }
 548
 549 }
 550
 551
 552 /*
 553  * Convenience functions to display a page containing only a string
 554  */
 555 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 556 {
 557         wprintf("HTTP/1.0 200 OK\n");
 558         output_headers(1);
 559         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
 560         wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
 561         wprintf("<B>%s</B>\n", titlebarmsg);
 562         wprintf("</FONT></TD></TR></TABLE><BR>\n");
 563         escputs(messagetext);
 564
 565         wprintf("<HR>\n");
 566         wDumpContent(1);
 567 }
 568
 569
 570 /*
 571  * Display a blank page.
 572  */
 573 void blank_page(void) {
 574         output_headers(7);
 575         wDumpContent(2);
 576 }
 577
 578
 579 void display_error(char *errormessage)
 580 {
 581         convenience_page("770000", "Error", errormessage);
 582 }
 583
 584 void display_success(char *successmessage)
 585 {
 586         convenience_page("007700", "OK", successmessage);
 587 }
 588
 589
 590
 591 void extract_action(char *actbuf, char *cmdbuf)
 592 {
 593         int i;
 594
 595         strcpy(actbuf, cmdbuf);
 596         if (!strncasecmp(actbuf, "GET /", 5))
 597                 strcpy(actbuf, &actbuf[5]);
 598         if (!strncasecmp(actbuf, "PUT /", 5))
 599                 strcpy(actbuf, &actbuf[5]);
 600         if (!strncasecmp(actbuf, "POST /", 6))
 601                 strcpy(actbuf, &actbuf[6]);
 602
 603         for (i = 0; i < strlen(actbuf); ++i) {
 604                 if (actbuf[i] == ' ') {
 605                         actbuf[i] = 0;
 606                         i = 0;
 607                 }
 608                 if (actbuf[i] == '/') {
 609                         actbuf[i] = 0;
 610                         i = 0;
 611                 }
 612                 if (actbuf[i] == '?') {
 613                         actbuf[i] = 0;
 614                         i = 0;
 615                 }
 616                 if (actbuf[i] == '&') {
 617                         actbuf[i] = 0;
 618                         i = 0;
 619                 }
 620         }
 621 }
 622
 623
 624 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 625                         void *content, char *cbtype, size_t length,
 626                         char *encoding, void *userdata)
 627 {
 628
 629         fprintf(stderr, "UPLOAD HANDLER CALLED\n");
 630         fprintf(stderr, "    name = %s\n", name);
 631         fprintf(stderr, "filename = %s\n", filename);
 632         fprintf(stderr, "encoding = %s\n", encoding);
 633         fprintf(stderr, "    type = %s\n", cbtype);
 634         fprintf(stderr, "  length = %ld\n", (long)length);
 635
 636         if ( (strlen(name) > 0) || (strlen(filename) > 0) ) {
 637                 WC->upload = malloc(length);
 638                 if (WC->upload != NULL) {
 639                         WC->upload_length = length;
 640                         memcpy(WC->upload, content, length);
 641                 }
 642         }
 643 }
 644
 645
 646 /*
 647  * Entry point for WebCit transaction
 648  */
 649 void session_loop(struct httprequest *req)
 650 {
 651         char cmd[SIZ];
 652         char action[SIZ];
 653         char buf[SIZ];
 654         int a, b;
 655         int ContentLength = 0;
 656         int BytesRead;
 657         char ContentType[512];
 658         char *content;
 659         char *content_end;
 660         struct httprequest *hptr;
 661         char browser_host[SIZ];
 662         char user_agent[SIZ];
 663
 664         /* We stuff these with the values coming from the client cookies,
 665          * so we can use them to reconnect a timed out session if we have to.
 666          */
 667         char c_host[SIZ];
 668         char c_port[SIZ];
 669         char c_username[SIZ];
 670         char c_password[SIZ];
 671         char c_roomname[SIZ];
 672         char cookie[SIZ];
 673
 674         strcpy(c_host, defaulthost);
 675         strcpy(c_port, defaultport);
 676         strcpy(c_username, "");
 677         strcpy(c_password, "");
 678         strcpy(c_roomname, "");
 679
 680         WC->upload_length = 0;
 681         WC->upload = NULL;
 682
 683         hptr = req;
 684         if (hptr == NULL) return;
 685
 686         strcpy(cmd, hptr->line);
 687         hptr = hptr->next;
 688         extract_action(action, cmd);
 689
 690         while (hptr != NULL) {
 691                 strcpy(buf, hptr->line);
 692                 hptr = hptr->next;
 693
 694                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 695                         strcpy(cookie, &buf[15]);
 696                         cookie_to_stuff(cookie, NULL,
 697                                       c_username, c_password, c_roomname);
 698                 }
 699                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 700                         ContentLength = atoi(&buf[16]);
 701                 }
 702                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 703                         strcpy(ContentType, &buf[14]);
 704                 }
 705                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 706                         strcpy(user_agent, &buf[12]);
 707                 }
 708         }
 709
 710         if (ContentLength > 0) {
 711                 fprintf(stderr, "Content length: %d\n", ContentLength);
 712                 content = malloc(ContentLength + 1);
 713                 memset(content, 0, ContentLength+1);
 714                 BytesRead = 0;
 715
 716                 while (BytesRead < ContentLength) {
 717                         a=read(WC->http_sock, &content[BytesRead],
 718                                 ContentLength - BytesRead);
 719                         if (a <= 0) BytesRead = ContentLength;
 720                         else BytesRead += a;
 721                 }
 722
 723                 if (!strncasecmp(ContentType,
 724                               "application/x-www-form-urlencoded", 33)) {
 725                         addurls(content);
 726                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 727                         content_end = content + ContentLength;
 728                         mime_parser(content, content_end, *upload_handler,
 729                                         NULL, NULL, NULL, 0);
 730                 }
 731         } else {
 732                 content = NULL;
 733         }
 734
 735         /* If there are variables in the URL, we must grab them now */
 736         for (a = 0; a < strlen(cmd); ++a)
 737                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 738                         for (b = a; b < strlen(cmd); ++b)
 739                                 if (isspace(cmd[b]))
 740                                         cmd[b] = 0;
 741                         addurls(&cmd[a + 1]);
 742                         cmd[a] = 0;
 743                 }
 744         /*
 745          * If we're not connected to a Citadel server, try to hook up the
 746          * connection now.  Preference is given to the host and port specified
 747          * by browser cookies, if cookies have been supplied.
 748          */
 749         if (!WC->connected) {
 750                 if (strlen(bstr("host")) > 0)
 751                         strcpy(c_host, bstr("host"));
 752                 if (strlen(bstr("port")) > 0)
 753                         strcpy(c_port, bstr("port"));
 754
 755                 if (!strcasecmp(c_host, "uds")) {
 756                         /* unix domain socket */
 757                         sprintf(buf, "%s/citadel.socket", c_port);
 758                         WC->serv_sock = uds_connectsock(buf);
 759                 }
 760                 else {
 761                         /* tcp socket */
 762                         WC->serv_sock = tcp_connectsock(c_host, c_port);
 763                 }
 764
 765                 if (WC->serv_sock < 0) {
 766                         do_logout();
 767                         goto SKIP_ALL_THIS_CRAP;
 768                 }
 769                 else {
 770                         WC->connected = 1;
 771                         serv_gets(buf); /* get the server welcome message */
 772                         locate_host(browser_host, WC->http_sock);
 773                         get_serv_info(browser_host, user_agent);
 774                 }
 775         }
 776
 777         check_for_express_messages();
 778
 779         /*
 780          * If we're not logged in, but we have username and password cookies
 781          * supplied by the browser, try using them to log in.
 782          */
 783         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
 784                 serv_printf("USER %s", c_username);
 785                 serv_gets(buf);
 786                 if (buf[0] == '3') {
 787                         serv_printf("PASS %s", c_password);
 788                         serv_gets(buf);
 789                         if (buf[0] == '2') {
 790                                 become_logged_in(c_username, c_password, buf);
 791                         }
 792                 }
 793         }
 794         /*
 795          * If we don't have a current room, but a cookie specifying the
 796          * current room is supplied, make an effort to go there.
 797          */
 798         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
 799                 serv_printf("GOTO %s", c_roomname);
 800                 serv_gets(buf);
 801                 if (buf[0] == '2') {
 802                         strcpy(WC->wc_roomname, c_roomname);
 803                 }
 804         }
 805         if (!strcasecmp(action, "static")) {
 806                 strcpy(buf, &cmd[12]);
 807                 for (a = 0; a < strlen(buf); ++a)
 808                         if (isspace(buf[a]))
 809                                 buf[a] = 0;
 810                 output_static(buf);
 811         } else if (!strcasecmp(action, "image")) {
 812                 output_image();
 813         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
 814                 do_login();
 815         } else if (!WC->logged_in) {
 816                 display_login(NULL);
 817         }
 818         /* Various commands... */
 819
 820         else if (!strcasecmp(action, "do_welcome")) {
 821                 do_welcome();
 822         } else if (!strcasecmp(action, "blank")) {
 823                 blank_page();
 824         } else if (!strcasecmp(action, "display_main_menu")) {
 825                 display_main_menu();
 826         } else if (!strcasecmp(action, "whobbs")) {
 827                 whobbs();
 828         } else if (!strcasecmp(action, "knrooms")) {
 829                 list_all_rooms_by_floor();
 830         } else if (!strcasecmp(action, "gotonext")) {
 831                 slrp_highest();
 832                 gotonext();
 833         } else if (!strcasecmp(action, "skip")) {
 834                 gotonext();
 835         } else if (!strcasecmp(action, "ungoto")) {
 836                 ungoto();
 837         } else if (!strcasecmp(action, "dotgoto")) {
 838                 slrp_highest();
 839                 smart_goto(bstr("room"));
 840         } else if (!strcasecmp(action, "dotskip")) {
 841                 smart_goto(bstr("room"));
 842         } else if (!strcasecmp(action, "termquit")) {
 843                 do_logout();
 844         } else if (!strcasecmp(action, "readnew")) {
 845                 readloop("readnew");
 846         } else if (!strcasecmp(action, "readold")) {
 847                 readloop("readold");
 848         } else if (!strcasecmp(action, "readfwd")) {
 849                 readloop("readfwd");
 850         } else if (!strcasecmp(action, "headers")) {
 851                 readloop("headers");
 852         } else if (!strcasecmp(action, "display_enter")) {
 853                 display_enter();
 854         } else if (!strcasecmp(action, "post")) {
 855                 post_message();
 856         } else if (!strcasecmp(action, "delete_msg")) {
 857                 delete_msg();
 858         } else if (!strcasecmp(action, "confirm_move_msg")) {
 859                 confirm_move_msg();
 860         } else if (!strcasecmp(action, "move_msg")) {
 861                 move_msg();
 862         } else if (!strcasecmp(action, "userlist")) {
 863                 userlist();
 864         } else if (!strcasecmp(action, "showuser")) {
 865                 showuser();
 866         } else if (!strcasecmp(action, "display_page")) {
 867                 display_page();
 868         } else if (!strcasecmp(action, "page_user")) {
 869                 page_user();
 870         } else if (!strcasecmp(action, "chat")) {
 871                 do_chat();
 872         } else if (!strcasecmp(action, "display_private")) {
 873                 display_private("", 0);
 874         } else if (!strcasecmp(action, "goto_private")) {
 875                 goto_private();
 876         } else if (!strcasecmp(action, "zapped_list")) {
 877                 zapped_list();
 878         } else if (!strcasecmp(action, "display_zap")) {
 879                 display_zap();
 880         } else if (!strcasecmp(action, "zap")) {
 881                 zap();
 882         } else if (!strcasecmp(action, "display_entroom")) {
 883                 display_entroom();
 884         } else if (!strcasecmp(action, "entroom")) {
 885                 entroom();
 886         } else if (!strcasecmp(action, "display_editroom")) {
 887                 display_editroom();
 888         } else if (!strcasecmp(action, "editroom")) {
 889                 editroom();
 890         } else if (!strcasecmp(action, "display_whok")) {
 891                 display_whok();
 892         } else if (!strcasecmp(action, "display_editinfo")) {
 893                 display_edit("Room info", "EINF 0", "RINF", "/editinfo");
 894         } else if (!strcasecmp(action, "editinfo")) {
 895                 save_edit("Room info", "EINF 1", 1);
 896         } else if (!strcasecmp(action, "display_editbio")) {
 897                 sprintf(buf, "RBIO %s", WC->wc_username);
 898                 display_edit("Your bio", "NOOP", buf, "editbio");
 899         } else if (!strcasecmp(action, "editbio")) {
 900                 save_edit("Your bio", "EBIO", 0);
 901         } else if (!strcasecmp(action, "confirm_delete_room")) {
 902                 confirm_delete_room();
 903         } else if (!strcasecmp(action, "delete_room")) {
 904                 delete_room();
 905         } else if (!strcasecmp(action, "validate")) {
 906                 validate();
 907         } else if (!strcasecmp(action, "display_editpic")) {
 908                 display_graphics_upload("your photo",
 909                                         "UIMG 0|_userpic_",
 910                                         "/editpic");
 911         } else if (!strcasecmp(action, "editpic")) {
 912                 do_graphics_upload("UIMG 1|_userpic_");
 913         } else if (!strcasecmp(action, "display_editroompic")) {
 914                 display_graphics_upload("the graphic for this room",
 915                                         "UIMG 0|_roompic_",
 916                                         "/editroompic");
 917         } else if (!strcasecmp(action, "editroompic")) {
 918                 do_graphics_upload("UIMG 1|_roompic_");
 919         } else if (!strcasecmp(action, "select_floor_to_edit_pic")) {
 920                 select_floor_to_edit_pic();
 921         } else if (!strcasecmp(action, "display_editfloorpic")) {
 922                 sprintf(buf, "UIMG 0|_floorpic_|%s",
 923                         bstr("which_floor"));
 924                 display_graphics_upload("the graphic for this floor",
 925                                         buf,
 926                                         "/editfloorpic");
 927         } else if (!strcasecmp(action, "editfloorpic")) {
 928                 sprintf(buf, "UIMG 1|_floorpic_|%s",
 929                         bstr("which_floor"));
 930                 do_graphics_upload(buf);
 931         } else if (!strcasecmp(action, "display_reg")) {
 932                 display_reg(0);
 933         } else if (!strcasecmp(action, "register")) {
 934                 register_user();
 935         } else if (!strcasecmp(action, "display_changepw")) {
 936                 display_changepw();
 937         } else if (!strcasecmp(action, "changepw")) {
 938                 changepw();
 939         } else if (!strcasecmp(action, "display_edit_node")) {
 940                 display_edit_node();
 941         } else if (!strcasecmp(action, "display_netconf")) {
 942                 display_netconf();
 943         } else if (!strcasecmp(action, "display_confirm_unshare")) {
 944                 display_confirm_unshare();
 945         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
 946                 display_confirm_delete_node();
 947         } else if (!strcasecmp(action, "delete_node")) {
 948                 delete_node();
 949         } else if (!strcasecmp(action, "unshare")) {
 950                 unshare();
 951         } else if (!strcasecmp(action, "display_add_node")) {
 952                 display_add_node();
 953         } else if (!strcasecmp(action, "add_node")) {
 954                 add_node();
 955         } else if (!strcasecmp(action, "display_share")) {
 956                 display_share();
 957         } else if (!strcasecmp(action, "share")) {
 958                 share();
 959         } else if (!strcasecmp(action, "terminate_session")) {
 960                 slrp_highest();
 961                 terminate_session();
 962         } else if (!strcasecmp(action, "edit_me")) {
 963                 edit_me();
 964         } else if (!strcasecmp(action, "display_siteconfig")) {
 965                 display_siteconfig();
 966         } else if (!strcasecmp(action, "page_popup")) {
 967                 page_popup();
 968         } else if (!strcasecmp(action, "siteconfig")) {
 969                 siteconfig();
 970         } else if (!strcasecmp(action, "display_generic")) {
 971                 display_generic();
 972         } else if (!strcasecmp(action, "do_generic")) {
 973                 do_generic();
 974         } else if (!strcasecmp(action, "display_menubar")) {
 975                 display_menubar(1);
 976         } else if (!strcasecmp(action, "output_mimepart")) {
 977                 output_mimepart();
 978         } else if (!strcasecmp(action, "diagnostics")) {
 979                 output_headers(1);
 980
 981                 wprintf("You're in session %d<HR>\n", WC->wc_session);
 982                 wprintf("Command: <BR><PRE>\n");
 983                 escputs(cmd);
 984                 wprintf("</PRE><HR>\n");
 985                 wprintf("Variables: <BR><PRE>\n");
 986                 dump_vars();
 987                 wprintf("</PRE><HR>\n");
 988                 wDumpContent(1);
 989         }
 990         /* When all else fais, display the main menu. */
 991         else {
 992                 display_main_menu();
 993         }
 994
 995 SKIP_ALL_THIS_CRAP:
 996         fflush(stdout);
 997         if (content != NULL) {
 998                 free(content);
 999                 content = NULL;
1000         }
1001         free_urls();
1002         if (WC->upload_length > 0) {
1003                 free(WC->upload);
1004                 WC->upload_length = 0;
1005         }
1006 }