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                 safestrncpy(buf, up, sizeof buf);
  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 "&" and "?" delimiters */
  96                 ptr = up;
  97                 b = strlen(up);
  98                 for (a = 0; a < strlen(up); ++a) {
  99                         if ( (ptr[0] == '&') || (ptr[0] == '?') ) {
 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) + 2);
 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[4096];
 159
 160         va_start(arg_ptr, format);
 161         vsnprintf(wbuf, sizeof wbuf, format, arg_ptr);
 162         va_end(arg_ptr);
 163
 164         client_write(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 (print_standard_html_footer) {
 178                 wprintf("</DIV>\n");    /* end of "text" div */
 179
 180                 /* NAVBAR
 181                 wprintf("<div id=\"navbar\">");
 182                 wprintf("FIXME the navbar should go here, dude...\n");
 183                 wprintf("</div>\n");
 184                  */
 185
 186                 do_template("trailing");
 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, int nolinebreaks)
 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 if ((strbuf[a] == '\n') && (nolinebreaks))
 221                         strcat(target, "");     /* nothing */
 222                 else if ((strbuf[a] == '\r') && (nolinebreaks))
 223                         strcat(target, "");     /* nothing */
 224                 else
 225                         strncat(target, &strbuf[a], 1);
 226         }
 227 }
 228
 229 void escputs1(char *strbuf, int nbsp, int nolinebreaks)
 230 {
 231         char *buf;
 232
 233         if (strbuf == NULL) return;
 234         buf = malloc( (3 * strlen(strbuf)) + SIZ );
 235         stresc(buf, strbuf, nbsp, nolinebreaks);
 236         wprintf("%s", buf);
 237         free(buf);
 238 }
 239
 240 void escputs(char *strbuf)
 241 {
 242         escputs1(strbuf, 0, 0);
 243 }
 244
 245 /*
 246  * Escape a string for feeding out as a URL.
 247  * Returns a pointer to a buffer that must be freed by the caller!
 248  */
 249 void urlesc(char *outbuf, char *strbuf)
 250 {
 251         int a, b, c;
 252         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 253
 254         strcpy(outbuf, "");
 255
 256         for (a = 0; a < strlen(strbuf); ++a) {
 257                 c = 0;
 258                 for (b = 0; b < strlen(ec); ++b) {
 259                         if (strbuf[a] == ec[b])
 260                                 c = 1;
 261                 }
 262                 b = strlen(outbuf);
 263                 if (c == 1)
 264                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 265                 else
 266                         sprintf(&outbuf[b], "%c", strbuf[a]);
 267         }
 268 }
 269
 270 void urlescputs(char *strbuf)
 271 {
 272         char outbuf[SIZ];
 273
 274         urlesc(outbuf, strbuf);
 275         wprintf("%s", outbuf);
 276 }
 277
 278
 279 /*
 280  * Copy a string, escaping characters for JavaScript strings.
 281  */
 282 void jsesc(char *target, char *strbuf)
 283 {
 284         int a;
 285         strcpy(target, "");
 286
 287         for (a = 0; a < strlen(strbuf); ++a) {
 288                 if (strbuf[a] == '<')
 289                         strcat(target, "[");
 290                 else if (strbuf[a] == '>')
 291                         strcat(target, "]");
 292                 else if (strbuf[a] == '\"')
 293                         strcat(target, "&quot;");
 294                 else if (strbuf[a] == '&')
 295                         strcat(target, "&amp;;");
 296                 else if (strbuf[a] == '\'')
 297                         strcat(target, "\\'");
 298                 else {
 299                         strncat(target, &strbuf[a], 1);
 300                 }
 301         }
 302 }
 303
 304 void jsescputs(char *strbuf)
 305 {
 306         char outbuf[SIZ];
 307
 308         jsesc(outbuf, strbuf);
 309         wprintf("%s", outbuf);
 310 }
 311
 312 /*
 313  * Copy a string, escaping characters for message text hold
 314  */
 315 void msgesc(char *target, char *strbuf)
 316 {
 317         int a;
 318         strcpy(target, "");
 319
 320         for (a = 0; a < strlen(strbuf); ++a) {
 321                 if (strbuf[a] == '\'')
 322                         strcat(target, "\\'");
 323                 else if (strbuf[a] == '\n')
 324                         strcat(target, " ");
 325                 else if (strbuf[a] == '\r')
 326                         strcat(target, " ");
 327                 else {
 328                         strncat(target, &strbuf[a], 1);
 329                 }
 330         }
 331 }
 332
 333 void msgescputs(char *strbuf) {
 334         char *outbuf;
 335
 336         if (strbuf == NULL) return;
 337         outbuf = malloc( (3 * strlen(strbuf)) + SIZ);
 338         msgesc(outbuf, strbuf);
 339         wprintf("%s", outbuf);
 340         free(outbuf);
 341 }
 342
 343
 344
 345
 346 /*
 347  * Output all that important stuff that the browser will want to see
 348  */
 349 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 350                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 351
 352                         int do_room_banner,     /* 0=no, 1=yes,                                     */
 353                                                 /* 2 = I'm going to embed my own, so don't open the */
 354                                                 /*     <div id="text"> either.                      */
 355
 356                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 357                         int refresh30,          /* 1 = automatically refresh page every 30 seconds  */
 358                         int suppress_check,     /* 1 = suppress check for instant messages          */
 359                         int cache               /* 1 = allow browser to cache this page             */
 360 ) {
 361         char cookie[SIZ];
 362         char httpnow[SIZ];
 363         char onload_fcn[SIZ];
 364         static int pageseq = 0;
 365
 366         wprintf("HTTP/1.0 200 OK\n");
 367         httpdate(httpnow, time(NULL));
 368
 369         if (do_httpheaders) {
 370                 wprintf("Content-type: text/html\n"
 371                         "Server: %s\n", SERVER
 372                 );
 373                 if (!cache)
 374                         wprintf("Connection: close\n"
 375                                 "Pragma: no-cache\n"
 376                                 "Cache-Control: no-store\n"
 377                         );
 378         }
 379
 380         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 381                         WC->wc_password, WC->wc_roomname);
 382
 383         if (unset_cookies) {
 384                 wprintf("Set-cookie: webcit=%s; path=/\n", unset);
 385         } else {
 386                 wprintf("Set-cookie: webcit=%s; path=/\n", cookie);
 387                 if (server_cookie != NULL) {
 388                         wprintf("%s\n", server_cookie);
 389                 }
 390         }
 391
 392         if (do_htmlhead) {
 393                 wprintf("\n");
 394
 395                 if (refresh30) {
 396                         svprintf("REFRESHTAG", WCS_STRING, "%s",
 397                                 "<meta http-equiv=\"refresh\" content=\"30\" />\n");
 398                 }
 399                 else {
 400                         svprintf("REFRESHTAG", WCS_STRING, "%s",
 401                                 "<meta http-equiv=\"refresh\" content=\"500363689;\" />\n");
 402                 }
 403
 404                 /* script for checking for pages (not always launched) */
 405
 406                 sprintf(onload_fcn, "function onload_fcn() { \n");
 407                 if (!suppress_check) if (WC->HaveExpressMessages) {
 408                         strcat(onload_fcn, "  launch_page_popup();  \n");
 409                         WC->HaveExpressMessages = 0;
 410                 }
 411                 strcat(onload_fcn, "} \n");
 412
 413                 svprintf("PAGERscript", WCS_STRING,
 414                         "<script language=\"JavaScript\">\n"
 415                         "function launch_page_popup() {\n"
 416                         "pwin = window.open('/page_popup', 'CitaPage%d', "
 417                         "'toolbar=no,location=no,copyhistory=no,status=no,"
 418                         "scrollbars=yes,resizable=no,height=250,width=400');\n"
 419                         "}\n"
 420
 421                         "%s\n"
 422                         "</script>\n",
 423                         ++pageseq,
 424                         onload_fcn
 425                 );
 426                 /* end script */
 427
 428                 do_template("head");
 429
 430                 svprintf("extrabodyparms", WCS_STRING, "%s",
 431                         "onload='onload_fcn();' ");
 432
 433                 do_template("background");
 434         }
 435
 436         /* ICONBAR */
 437         if (do_htmlhead) {
 438                 if ( (WC->logged_in) && (!unset_cookies) ) {
 439                         wprintf("<div id=\"iconbar\">");
 440                         do_iconbar();
 441                         wprintf("</div>\n");
 442                 }
 443                 if (do_room_banner == 1) {
 444                         wprintf("<div id=\"banner\">\n");
 445                         embed_room_banner(NULL);
 446                         wprintf("</div>\n");
 447                 }
 448         }
 449
 450         if (do_room_banner != 2) {
 451                 wprintf("<div id=\"text\">\n");
 452         }
 453
 454         if (strlen(WC->ImportantMessage) > 0) {
 455                 do_template("beginbox_nt");
 456                 wprintf("<SPAN CLASS=\"errormsg\">"
 457                         "%s</SPAN><br />\n", WC->ImportantMessage);
 458                 do_template("endbox");
 459                 strcpy(WC->ImportantMessage, "");
 460         }
 461 }
 462
 463
 464 /*
 465  *
 466  */
 467 void http_redirect(char *whichpage) {
 468         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 469         wprintf("Location: %s\n", whichpage);
 470         wprintf("URI: %s\n", whichpage);
 471         wprintf("Content-type: text/html\n\n");
 472         wprintf("<html><body>\n");
 473         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 474                 whichpage);
 475         wprintf("</body></html>\n");
 476 }
 477
 478
 479
 480 void check_for_express_messages()
 481 {
 482         char buf[SIZ];
 483
 484         serv_puts("NOOP");
 485         serv_gets(buf);
 486         if (buf[3] == '*') WC->HaveExpressMessages = 1;
 487 }
 488
 489
 490
 491
 492 /*
 493  * Output a piece of content to the web browser
 494  */
 495 void http_transmit_thing(char *thing, size_t length, char *content_type,
 496                          int is_static) {
 497         if (is_static) {
 498                 output_headers(0, 0, 0, 0, 0, 0, 1);
 499         }
 500         else {
 501                 output_headers(0, 0, 0, 0, 0, 0, 0);
 502         }
 503         wprintf("Content-type: %s\n"
 504                 "Content-length: %ld\n"
 505                 "Server: %s\n"
 506                 "Connection: close\n"
 507                 "\n",
 508                 content_type,
 509                 (long) length,
 510                 SERVER
 511         );
 512         client_write(thing, (size_t)length);
 513 }
 514
 515
 516
 517
 518 void output_static(char *what)
 519 {
 520         char buf[4096];
 521         FILE *fp;
 522         struct stat statbuf;
 523         off_t bytes;
 524         char *bigbuffer;
 525         char content_type[SIZ];
 526
 527         sprintf(buf, "static/%s", what);
 528         fp = fopen(buf, "rb");
 529         if (fp == NULL) {
 530                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 531                 wprintf("Content-Type: text/plain\n");
 532                 wprintf("\n");
 533                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 534         } else {
 535                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 536                         strcpy(content_type, "image/gif");
 537                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 538                         strcpy(content_type, "text/plain");
 539                 else if (!strncasecmp(&what[strlen(what) - 4], ".css", 4))
 540                         strcpy(content_type, "text/css");
 541                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 542                         strcpy(content_type, "image/jpeg");
 543                 else if (!strncasecmp(&what[strlen(what) - 4], ".png", 4))
 544                         strcpy(content_type, "image/png");
 545                 else if (!strncasecmp(&what[strlen(what) - 4], ".ico", 4))
 546                         strcpy(content_type, "image/x-icon");
 547                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 548                         strcpy(content_type, "text/html");
 549                 else if (!strncasecmp(&what[strlen(what) - 4], ".htm", 4))
 550                         strcpy(content_type, "text/html");
 551                 else if (!strncasecmp(&what[strlen(what) - 4], ".wml", 4))
 552                         strcpy(content_type, "text/vnd.wap.wml");
 553                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmls", 5))
 554                         strcpy(content_type, "text/vnd.wap.wmlscript");
 555                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmlc", 5))
 556                         strcpy(content_type, "application/vnd.wap.wmlc");
 557                 else if (!strncasecmp(&what[strlen(what) - 6], ".wmlsc", 6))
 558                         strcpy(content_type, "application/vnd.wap.wmlscriptc");
 559                 else if (!strncasecmp(&what[strlen(what) - 5], ".wbmp", 5))
 560                         strcpy(content_type, "image/vnd.wap.wbmp");
 561                 else if (!strncasecmp(&what[strlen(what) - 3], ".js", 3))
 562                         strcpy(content_type, "text/javascript");
 563                 else
 564                         strcpy(content_type, "application/octet-stream");
 565
 566                 fstat(fileno(fp), &statbuf);
 567                 bytes = statbuf.st_size;
 568                 lprintf(3, "Static: %s, (%s; %ld bytes)\n", what, content_type, bytes);
 569                 bigbuffer = malloc(bytes + 2);
 570                 fread(bigbuffer, bytes, 1, fp);
 571                 fclose(fp);
 572
 573                 http_transmit_thing(bigbuffer, (size_t)bytes, content_type, 1);
 574                 free(bigbuffer);
 575         }
 576         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 577                 end_webcit_session();
 578         }
 579 }
 580
 581
 582 /*
 583  * When the browser requests an image file from the Citadel server,
 584  * this function is called to transmit it.
 585  */
 586 void output_image()
 587 {
 588         char buf[SIZ];
 589         char *xferbuf = NULL;
 590         off_t bytes;
 591
 592         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 593         serv_gets(buf);
 594         if (buf[0] == '2') {
 595                 bytes = extract_long(&buf[4], 0);
 596                 xferbuf = malloc(bytes + 2);
 597
 598                 /* Read it from the server */
 599                 read_server_binary(xferbuf, bytes);
 600                 serv_puts("CLOS");
 601                 serv_gets(buf);
 602
 603                 /* Write it to the browser */
 604                 http_transmit_thing(xferbuf, (size_t)bytes, "image/gif", 0);
 605                 free(xferbuf);
 606
 607         } else {
 608
 609                 /* Instead of an ugly 404, send a 1x1 transparent GIF
 610                  * when there's no such image on the server.
 611                  */
 612                 output_static("blank.gif");
 613
 614                 /*
 615                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 616                 output_headers(0, 0, 0, 0, 0, 0, 0);
 617                 wprintf("Content-Type: text/plain\n"
 618                         "\n"
 619                         "Error retrieving image: %s\n",
 620                         &buf[4]
 621                 );
 622                 */
 623
 624         }
 625
 626
 627
 628 }
 629
 630 /*
 631  */
 632 void output_mimepart()
 633 {
 634         char buf[SIZ];
 635         off_t bytes;
 636         char content_type[SIZ];
 637         char *content = NULL;
 638
 639         serv_printf("OPNA %s|%s", bstr("msgnum"), bstr("partnum"));
 640         serv_gets(buf);
 641         if (buf[0] == '2') {
 642                 bytes = extract_long(&buf[4], 0);
 643                 content = malloc(bytes + 2);
 644                 extract(content_type, &buf[4], 3);
 645                 output_headers(0, 0, 0, 0, 0, 0, 0);
 646                 read_server_binary(content, bytes);
 647                 serv_puts("CLOS");
 648                 serv_gets(buf);
 649                 http_transmit_thing(content, bytes, content_type, 0);
 650                 free(content);
 651         } else {
 652                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 653                 output_headers(0, 0, 0, 0, 0, 0, 0);
 654                 wprintf("Content-Type: text/plain\n");
 655                 wprintf("\n");
 656                 wprintf("Error retrieving part: %s\n", &buf[4]);
 657         }
 658
 659 }
 660
 661
 662 /*
 663  */
 664 char *load_mimepart(long msgnum, char *partnum)
 665 {
 666         char buf[SIZ];
 667         off_t bytes;
 668         char content_type[SIZ];
 669         char *content;
 670
 671         serv_printf("OPNA %ld|%s", msgnum, partnum);
 672         serv_gets(buf);
 673         if (buf[0] == '2') {
 674                 bytes = extract_long(&buf[4], 0);
 675                 extract(content_type, &buf[4], 3);
 676
 677                 content = malloc(bytes + 2);
 678                 read_server_binary(content, bytes);
 679
 680                 serv_puts("CLOS");
 681                 serv_gets(buf);
 682                 content[bytes] = 0;     /* null terminate for good measure */
 683                 return(content);
 684         }
 685         else {
 686                 return(NULL);
 687         }
 688
 689 }
 690
 691
 692 /*
 693  * Convenience functions to display a page containing only a string
 694  */
 695 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 696 {
 697         wprintf("HTTP/1.0 200 OK\n");
 698         output_headers(1, 1, 2, 0, 0, 0, 0);
 699         wprintf("<div id=\"banner\">\n");
 700         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#%s\"><TR><TD>", titlebarcolor);
 701         wprintf("<SPAN CLASS=\"titlebar\">%s</SPAN>\n", titlebarmsg);
 702         wprintf("</TD></TR></TABLE>\n");
 703         wprintf("</div><div id=\"text\">\n");
 704         escputs(messagetext);
 705
 706         wprintf("<hr />\n");
 707         wDumpContent(1);
 708 }
 709
 710
 711 /*
 712  * Display a blank page.
 713  */
 714 void blank_page(void) {
 715         output_headers(1, 1, 0, 0, 1, 0, 0);
 716         wDumpContent(2);
 717 }
 718
 719
 720 /*
 721  * A template has been requested
 722  */
 723 void url_do_template(void) {
 724         do_template(bstr("template"));
 725 }
 726
 727
 728
 729 /*
 730  * Offer to make any page the user's "start page."
 731  */
 732 void offer_start_page(void) {
 733         wprintf("<A HREF=\"/change_start_page?startpage=");
 734         urlescputs(WC->this_page);
 735         wprintf("\">"
 736                 "<FONT SIZE=-2 COLOR=\"#AAAAAA\">Make this my start page</FONT>"
 737                 "</A>"
 738         );
 739 }
 740
 741
 742 /*
 743  * Change the user's start page
 744  */
 745 void change_start_page(void) {
 746
 747         if (bstr("startpage") == NULL) {
 748                 strcpy(WC->ImportantMessage,
 749                         "startpage set to null");
 750                 display_main_menu();
 751                 return;
 752         }
 753
 754         set_preference("startpage", bstr("startpage"));
 755
 756         output_headers(1, 1, 0, 0, 0, 0, 0);
 757         do_template("newstartpage");
 758         wDumpContent(1);
 759 }
 760
 761
 762
 763
 764 void display_success(char *successmessage)
 765 {
 766         convenience_page("007700", "OK", successmessage);
 767 }
 768
 769
 770
 771 void extract_action(char *actbuf, char *cmdbuf)
 772 {
 773         int i;
 774
 775         strcpy(actbuf, cmdbuf);
 776         if (!strncasecmp(actbuf, "GET /", 5))
 777                 strcpy(actbuf, &actbuf[5]);
 778         if (!strncasecmp(actbuf, "PUT /", 5))
 779                 strcpy(actbuf, &actbuf[5]);
 780         if (!strncasecmp(actbuf, "POST /", 6))
 781                 strcpy(actbuf, &actbuf[6]);
 782
 783         for (i = 0; i < strlen(actbuf); ++i) {
 784                 if (actbuf[i] == ' ') {
 785                         actbuf[i] = 0;
 786                         i = 0;
 787                 }
 788                 if (actbuf[i] == '/') {
 789                         actbuf[i] = 0;
 790                         i = 0;
 791                 }
 792                 if (actbuf[i] == '?') {
 793                         actbuf[i] = 0;
 794                         i = 0;
 795                 }
 796                 if (actbuf[i] == '&') {
 797                         actbuf[i] = 0;
 798                         i = 0;
 799                 }
 800         }
 801 }
 802
 803
 804 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 805                         void *content, char *cbtype, size_t length,
 806                         char *encoding, void *userdata)
 807 {
 808         struct urlcontent *u;
 809
 810         /* Form fields */
 811         if ( (length > 0) && (strlen(cbtype) == 0) ) {
 812                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
 813                 u->next = WC->urlstrings;
 814                 WC->urlstrings = u;
 815                 safestrncpy(u->url_key, name, sizeof(u->url_key));
 816                 u->url_data = malloc(length + 1);
 817                 memcpy(u->url_data, content, length);
 818                 u->url_data[length] = 0;
 819         }
 820
 821         /* Uploaded files */
 822         if ( (length > 0) && (strlen(cbtype) > 0) ) {
 823                 WC->upload = malloc(length);
 824                 if (WC->upload != NULL) {
 825                         WC->upload_length = length;
 826                         safestrncpy(WC->upload_filename, filename,
 827                                         sizeof(WC->upload_filename));
 828                         safestrncpy(WC->upload_content_type, cbtype,
 829                                         sizeof(WC->upload_content_type));
 830                         memcpy(WC->upload, content, length);
 831                 }
 832                 else {
 833                         lprintf(3, "malloc() failed: %s\n", strerror(errno));
 834                 }
 835         }
 836
 837 }
 838
 839
 840
 841
 842 /*
 843  * Entry point for WebCit transaction
 844  */
 845 void session_loop(struct httprequest *req)
 846 {
 847         char cmd[SIZ];
 848         char action[SIZ];
 849         char buf[SIZ];
 850         int a, b;
 851         int ContentLength = 0;
 852         int BytesRead = 0;
 853         char ContentType[512];
 854         char *content;
 855         char *content_end;
 856         struct httprequest *hptr;
 857         char browser_host[SIZ];
 858         char user_agent[SIZ];
 859         int body_start;
 860
 861         /* We stuff these with the values coming from the client cookies,
 862          * so we can use them to reconnect a timed out session if we have to.
 863          */
 864         char c_username[SIZ];
 865         char c_password[SIZ];
 866         char c_roomname[SIZ];
 867         char cookie[SIZ];
 868
 869         strcpy(c_username, "");
 870         strcpy(c_password, "");
 871         strcpy(c_roomname, "");
 872
 873         WC->upload_length = 0;
 874         WC->upload = NULL;
 875         WC->vars = NULL;
 876
 877         WC->is_wap = 0;
 878
 879         hptr = req;
 880         if (hptr == NULL) return;
 881
 882         strcpy(cmd, hptr->line);
 883         hptr = hptr->next;
 884         extract_action(action, cmd);
 885
 886         while (hptr != NULL) {
 887                 strcpy(buf, hptr->line);
 888                 hptr = hptr->next;
 889
 890                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 891                         safestrncpy(cookie, &buf[15], sizeof cookie);
 892                         cookie_to_stuff(cookie, NULL,
 893                                       c_username, c_password, c_roomname);
 894                 }
 895                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 896                         ContentLength = atoi(&buf[16]);
 897                 }
 898                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 899                         safestrncpy(ContentType, &buf[14], sizeof ContentType);
 900                 }
 901                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 902                         safestrncpy(user_agent, &buf[12], sizeof user_agent);
 903                 }
 904                 else if (!strncasecmp(buf, "Host: ", 6)) {
 905                         safestrncpy(WC->http_host, &buf[6], sizeof WC->http_host);
 906                 }
 907                 /* Only WAP gateways explicitly name this content-type */
 908                 else if (strstr(buf, "text/vnd.wap.wml")) {
 909                         WC->is_wap = 1;
 910                 }
 911         }
 912
 913         if (ContentLength > 0) {
 914                 content = malloc(ContentLength + SIZ);
 915                 memset(content, 0, ContentLength + SIZ);
 916                 sprintf(content, "Content-type: %s\n"
 917                                 "Content-length: %d\n\n",
 918                                 ContentType, ContentLength);
 919                 body_start = strlen(content);
 920
 921 /***** old version
 922                 BytesRead = 0;
 923                 while (BytesRead < ContentLength) {
 924                         a=read(WC->http_sock, &content[BytesRead+body_start],
 925                                 ContentLength - BytesRead);
 926                         if (a <= 0) BytesRead = ContentLength;
 927                         else BytesRead += a;
 928                 }
 929 *******/
 930
 931                 /* Now we're daring and read it all at once. */
 932                 client_read(WC->http_sock, &content[BytesRead+body_start], ContentLength);
 933
 934                 if (!strncasecmp(ContentType,
 935                               "application/x-www-form-urlencoded", 33)) {
 936                         addurls(&content[body_start]);
 937                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 938                         content_end = content + ContentLength + body_start;
 939                         mime_parser(content, content_end, *upload_handler,
 940                                         NULL, NULL, NULL, 0);
 941                 }
 942         } else {
 943                 content = NULL;
 944         }
 945
 946         /* make a note of where we are in case the user wants to save it */
 947         safestrncpy(WC->this_page, cmd, sizeof(WC->this_page));
 948         remove_token(WC->this_page, 2, ' ');
 949         remove_token(WC->this_page, 0, ' ');
 950
 951         /* If there are variables in the URL, we must grab them now */
 952         for (a = 0; a < strlen(cmd); ++a) {
 953                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 954                         for (b = a; b < strlen(cmd); ++b)
 955                                 if (isspace(cmd[b]))
 956                                         cmd[b] = 0;
 957                         addurls(&cmd[a + 1]);
 958                         cmd[a] = 0;
 959                 }
 960         }
 961
 962         /* Static content can be sent without connecting to Citadel. */
 963         if (!strcasecmp(action, "static")) {
 964                 strcpy(buf, &cmd[12]);
 965                 for (a = 0; a < strlen(buf); ++a)
 966                         if (isspace(buf[a]))
 967                                 buf[a] = 0;
 968                 output_static(buf);
 969                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
 970         }
 971
 972         /*
 973          * If we're not connected to a Citadel server, try to hook up the
 974          * connection now.
 975          */
 976         if (!WC->connected) {
 977                 if (!strcasecmp(ctdlhost, "uds")) {
 978                         /* unix domain socket */
 979                         sprintf(buf, "%s/citadel.socket", ctdlport);
 980                         WC->serv_sock = uds_connectsock(buf);
 981                 }
 982                 else {
 983                         /* tcp socket */
 984                         WC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 985                 }
 986
 987                 if (WC->serv_sock < 0) {
 988                         do_logout();
 989                         goto SKIP_ALL_THIS_CRAP;
 990                 }
 991                 else {
 992                         WC->connected = 1;
 993                         serv_gets(buf); /* get the server welcome message */
 994                         locate_host(browser_host, WC->http_sock);
 995                         get_serv_info(browser_host, user_agent);
 996                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
 997                                 wprintf("You are connected to a Citadel "
 998                                         "server running Citadel %d.%02d;\nin "
 999                                         "order to run this version of WebCit "
1000                                         "you must also have Citadel %d.%02d or"
1001                                         " newer.\n\n\n",
1002                                                 serv_info.serv_rev_level / 100,
1003                                                 serv_info.serv_rev_level % 100,
1004                                                 MINIMUM_CIT_VERSION / 100,
1005                                                 MINIMUM_CIT_VERSION % 100
1006                                         );
1007                                 end_webcit_session();
1008                                 goto SKIP_ALL_THIS_CRAP;
1009                         }
1010                 }
1011         }
1012
1013         /*
1014          * Functions which can be performed without logging in
1015          */
1016         if (!strcasecmp(action, "listsub")) {
1017                 do_listsub();
1018                 goto SKIP_ALL_THIS_CRAP;
1019         }
1020 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1021         if (!strcasecmp(action, "freebusy")) {
1022                 do_freebusy(cmd);
1023                 goto SKIP_ALL_THIS_CRAP;
1024         }
1025 #endif
1026
1027         check_for_express_messages();
1028
1029         /*
1030          * If we're not logged in, but we have username and password cookies
1031          * supplied by the browser, try using them to log in.
1032          */
1033         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
1034                 serv_printf("USER %s", c_username);
1035                 serv_gets(buf);
1036                 if (buf[0] == '3') {
1037                         serv_printf("PASS %s", c_password);
1038                         serv_gets(buf);
1039                         if (buf[0] == '2') {
1040                                 become_logged_in(c_username, c_password, buf);
1041                         }
1042                 }
1043         }
1044         /*
1045          * If we don't have a current room, but a cookie specifying the
1046          * current room is supplied, make an effort to go there.
1047          */
1048         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
1049                 serv_printf("GOTO %s", c_roomname);
1050                 serv_gets(buf);
1051                 if (buf[0] == '2') {
1052                         strcpy(WC->wc_roomname, c_roomname);
1053                 }
1054         }
1055
1056         if (!strcasecmp(action, "image")) {
1057                 output_image();
1058
1059         /*
1060          * All functions handled below this point ... make sure we log in
1061          * before doing anything else!
1062          */
1063         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
1064                 do_login();
1065         } else if (!WC->logged_in) {
1066                 display_login(NULL);
1067         }
1068
1069         /*
1070          * Various commands...
1071          */
1072
1073         else if (!strcasecmp(action, "do_welcome")) {
1074                 do_welcome();
1075         } else if (!strcasecmp(action, "blank")) {
1076                 blank_page();
1077         } else if (!strcasecmp(action, "do_template")) {
1078                 url_do_template();
1079         } else if (!strcasecmp(action, "display_main_menu")) {
1080                 display_main_menu();
1081         } else if (!strcasecmp(action, "whobbs")) {
1082                 whobbs();
1083         } else if (!strcasecmp(action, "knrooms")) {
1084                 knrooms();
1085         } else if (!strcasecmp(action, "gotonext")) {
1086                 slrp_highest();
1087                 gotonext();
1088         } else if (!strcasecmp(action, "skip")) {
1089                 gotonext();
1090         } else if (!strcasecmp(action, "ungoto")) {
1091                 ungoto();
1092         } else if (!strcasecmp(action, "dotgoto")) {
1093                 slrp_highest();
1094                 smart_goto(bstr("room"));
1095         } else if (!strcasecmp(action, "dotskip")) {
1096                 smart_goto(bstr("room"));
1097         } else if (!strcasecmp(action, "termquit")) {
1098                 do_logout();
1099         } else if (!strcasecmp(action, "readnew")) {
1100                 readloop("readnew");
1101         } else if (!strcasecmp(action, "readold")) {
1102                 readloop("readold");
1103         } else if (!strcasecmp(action, "readfwd")) {
1104                 readloop("readfwd");
1105         } else if (!strcasecmp(action, "headers")) {
1106                 readloop("headers");
1107         } else if (!strcasecmp(action, "display_enter")) {
1108                 display_enter();
1109         } else if (!strcasecmp(action, "post")) {
1110                 post_message();
1111         } else if (!strcasecmp(action, "do_stuff_to_one_msg")) {
1112                 do_stuff_to_one_msg();
1113         } else if (!strcasecmp(action, "move_msg")) {
1114                 move_msg();
1115         } else if (!strcasecmp(action, "userlist")) {
1116                 userlist();
1117         } else if (!strcasecmp(action, "showuser")) {
1118                 showuser();
1119         } else if (!strcasecmp(action, "display_page")) {
1120                 display_page();
1121         } else if (!strcasecmp(action, "page_user")) {
1122                 page_user();
1123         } else if (!strcasecmp(action, "chat")) {
1124                 do_chat();
1125         } else if (!strcasecmp(action, "display_private")) {
1126                 display_private("", 0);
1127         } else if (!strcasecmp(action, "goto_private")) {
1128                 goto_private();
1129         } else if (!strcasecmp(action, "zapped_list")) {
1130                 zapped_list();
1131         } else if (!strcasecmp(action, "display_zap")) {
1132                 display_zap();
1133         } else if (!strcasecmp(action, "zap")) {
1134                 zap();
1135         } else if (!strcasecmp(action, "display_entroom")) {
1136                 display_entroom();
1137         } else if (!strcasecmp(action, "entroom")) {
1138                 entroom();
1139         } else if (!strcasecmp(action, "display_editroom")) {
1140                 display_editroom();
1141         } else if (!strcasecmp(action, "netedit")) {
1142                 netedit();
1143         } else if (!strcasecmp(action, "editroom")) {
1144                 editroom();
1145         } else if (!strcasecmp(action, "display_whok")) {
1146                 display_whok();
1147         } else if (!strcasecmp(action, "display_editinfo")) {
1148                 display_edit("Room info", "EINF 0", "RINF", "/editinfo", 1);
1149         } else if (!strcasecmp(action, "editinfo")) {
1150                 save_edit("Room info", "EINF 1", 1);
1151         } else if (!strcasecmp(action, "display_editbio")) {
1152                 sprintf(buf, "RBIO %s", WC->wc_username);
1153                 display_edit("Your bio", "NOOP", buf, "editbio", 3);
1154         } else if (!strcasecmp(action, "editbio")) {
1155                 save_edit("Your bio", "EBIO", 0);
1156         } else if (!strcasecmp(action, "confirm_delete_room")) {
1157                 confirm_delete_room();
1158         } else if (!strcasecmp(action, "delete_room")) {
1159                 delete_room();
1160         } else if (!strcasecmp(action, "validate")) {
1161                 validate();
1162         } else if (!strcasecmp(action, "display_editpic")) {
1163                 display_graphics_upload("your photo",
1164                                         "UIMG 0|_userpic_",
1165                                         "/editpic");
1166         } else if (!strcasecmp(action, "editpic")) {
1167                 do_graphics_upload("UIMG 1|_userpic_");
1168         } else if (!strcasecmp(action, "display_editroompic")) {
1169                 display_graphics_upload("the graphic for this room",
1170                                         "UIMG 0|_roompic_",
1171                                         "/editroompic");
1172         } else if (!strcasecmp(action, "editroompic")) {
1173                 do_graphics_upload("UIMG 1|_roompic_");
1174         } else if (!strcasecmp(action, "delete_floor")) {
1175                 delete_floor();
1176         } else if (!strcasecmp(action, "rename_floor")) {
1177                 rename_floor();
1178         } else if (!strcasecmp(action, "create_floor")) {
1179                 create_floor();
1180         } else if (!strcasecmp(action, "display_editfloorpic")) {
1181                 sprintf(buf, "UIMG 0|_floorpic_|%s",
1182                         bstr("which_floor"));
1183                 display_graphics_upload("the graphic for this floor",
1184                                         buf,
1185                                         "/editfloorpic");
1186         } else if (!strcasecmp(action, "editfloorpic")) {
1187                 sprintf(buf, "UIMG 1|_floorpic_|%s",
1188                         bstr("which_floor"));
1189                 do_graphics_upload(buf);
1190         } else if (!strcasecmp(action, "display_reg")) {
1191                 display_reg(0);
1192         } else if (!strcasecmp(action, "display_changepw")) {
1193                 display_changepw();
1194         } else if (!strcasecmp(action, "changepw")) {
1195                 changepw();
1196         } else if (!strcasecmp(action, "display_edit_node")) {
1197                 display_edit_node();
1198         } else if (!strcasecmp(action, "edit_node")) {
1199                 edit_node();
1200         } else if (!strcasecmp(action, "display_netconf")) {
1201                 display_netconf();
1202         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
1203                 display_confirm_delete_node();
1204         } else if (!strcasecmp(action, "delete_node")) {
1205                 delete_node();
1206         } else if (!strcasecmp(action, "display_add_node")) {
1207                 display_add_node();
1208         } else if (!strcasecmp(action, "add_node")) {
1209                 add_node();
1210         } else if (!strcasecmp(action, "terminate_session")) {
1211                 slrp_highest();
1212                 terminate_session();
1213         } else if (!strcasecmp(action, "edit_me")) {
1214                 edit_me();
1215         } else if (!strcasecmp(action, "display_siteconfig")) {
1216                 display_siteconfig();
1217         } else if (!strcasecmp(action, "chat_recv")) {
1218                 chat_recv();
1219         } else if (!strcasecmp(action, "chat_send")) {
1220                 chat_send();
1221         } else if (!strcasecmp(action, "page_popup")) {
1222                 page_popup();
1223         } else if (!strcasecmp(action, "siteconfig")) {
1224                 siteconfig();
1225         } else if (!strcasecmp(action, "display_generic")) {
1226                 display_generic();
1227         } else if (!strcasecmp(action, "do_generic")) {
1228                 do_generic();
1229         } else if (!strcasecmp(action, "display_menubar")) {
1230                 display_menubar(1);
1231         } else if (!strcasecmp(action, "output_mimepart")) {
1232                 output_mimepart();
1233         } else if (!strcasecmp(action, "edit_vcard")) {
1234                 edit_vcard();
1235         } else if (!strcasecmp(action, "submit_vcard")) {
1236                 submit_vcard();
1237         } else if (!strcasecmp(action, "select_user_to_edit")) {
1238                 select_user_to_edit(NULL, NULL);
1239         } else if (!strcasecmp(action, "display_edituser")) {
1240                 display_edituser(NULL, 0);
1241         } else if (!strcasecmp(action, "edituser")) {
1242                 edituser();
1243         } else if (!strcasecmp(action, "create_user")) {
1244                 create_user();
1245         } else if (!strcasecmp(action, "changeview")) {
1246                 change_view();
1247         } else if (!strcasecmp(action, "do_stuff_to_msgs")) {
1248                 do_stuff_to_msgs();
1249         } else if (!strcasecmp(action, "change_start_page")) {
1250                 change_start_page();
1251         } else if (!strcasecmp(action, "display_floorconfig")) {
1252                 display_floorconfig(NULL);
1253         } else if (!strcasecmp(action, "toggle_self_service")) {
1254                 toggle_self_service();
1255 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1256         } else if (!strcasecmp(action, "display_edit_task")) {
1257                 display_edit_task();
1258         } else if (!strcasecmp(action, "save_task")) {
1259                 save_task();
1260         } else if (!strcasecmp(action, "display_edit_event")) {
1261                 display_edit_event();
1262         } else if (!strcasecmp(action, "save_event")) {
1263                 save_event();
1264         } else if (!strcasecmp(action, "respond_to_request")) {
1265                 respond_to_request();
1266         } else if (!strcasecmp(action, "handle_rsvp")) {
1267                 handle_rsvp();
1268 #endif
1269         } else if (!strcasecmp(action, "summary")) {
1270                 summary();
1271         } else if (!strcasecmp(action, "iconbar")) {
1272                 do_iconbar();
1273         } else if (!strcasecmp(action, "display_customize_iconbar")) {
1274                 display_customize_iconbar();
1275         } else if (!strcasecmp(action, "commit_iconbar")) {
1276                 commit_iconbar();
1277         } else if (!strcasecmp(action, "set_room_policy")) {
1278                 set_room_policy();
1279         } else if (!strcasecmp(action, "display_inetconf")) {
1280                 display_inetconf();
1281         } else if (!strcasecmp(action, "save_inetconf")) {
1282                 save_inetconf();
1283         } else if (!strcasecmp(action, "diagnostics")) {
1284                 output_headers(1, 1, 1, 0, 0, 0, 0);
1285
1286                 wprintf("You're in session %d<hr />\n", WC->wc_session);
1287                 wprintf("Command: <br /><PRE>\n");
1288                 escputs(cmd);
1289                 wprintf("</PRE><hr />\n");
1290                 wprintf("Variables: <br /><PRE>\n");
1291                 dump_vars();
1292                 wprintf("</PRE><hr />\n");
1293                 wDumpContent(1);
1294         }
1295         /* When all else fais, display the main menu. */
1296         else {
1297                 display_main_menu();
1298         }
1299
1300 SKIP_ALL_THIS_CRAP:
1301         fflush(stdout);
1302         if (content != NULL) {
1303                 free(content);
1304                 content = NULL;
1305         }
1306         free_urls();
1307         if (WC->upload_length > 0) {
1308                 free(WC->upload);
1309                 WC->upload_length = 0;
1310         }
1311
1312 }