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 "groupdav.h"
  33 #include "webserver.h"
  34 #include "mime_parser.h"
  35
  36 /*
  37  * String to unset the cookie.
  38  * Any date "in the past" will work, so I chose my birthday, right down to
  39  * the exact minute.  :)
  40  */
  41 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  42
  43 void unescape_input(char *buf)
  44 {
  45         int a, b;
  46         char hex[3];
  47
  48         while ((isspace(buf[strlen(buf) - 1])) && (strlen(buf) > 0))
  49                 buf[strlen(buf) - 1] = 0;
  50
  51         for (a = 0; a < strlen(buf); ++a) {
  52                 if (buf[a] == '+')
  53                         buf[a] = ' ';
  54                 if (buf[a] == '%') {
  55                         hex[0] = buf[a + 1];
  56                         hex[1] = buf[a + 2];
  57                         hex[2] = 0;
  58                         b = 0;
  59                         sscanf(hex, "%02x", &b);
  60                         buf[a] = (char) b;
  61                         strcpy(&buf[a + 1], &buf[a + 3]);
  62                 }
  63         }
  64
  65 }
  66
  67
  68 void addurls(char *url)
  69 {
  70         char *up, *ptr;
  71         char buf[SIZ];
  72         int a, b;
  73         struct urlcontent *u;
  74
  75         up = url;
  76         while (strlen(up) > 0) {
  77
  78                 /* locate the = sign */
  79                 safestrncpy(buf, up, sizeof buf);
  80                 b = (-1);
  81                 for (a = 255; a >= 0; --a)
  82                         if (buf[a] == '=')
  83                                 b = a;
  84                 if (b < 0)
  85                         return;
  86                 buf[b] = 0;
  87
  88                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
  89                 u->next = WC->urlstrings;
  90                 WC->urlstrings = u;
  91                 strcpy(u->url_key, buf);
  92
  93                 /* now chop that part off */
  94                 for (a = 0; a <= b; ++a)
  95                         ++up;
  96
  97                 /* locate "&" and "?" delimiters */
  98                 ptr = up;
  99                 b = strlen(up);
 100                 for (a = 0; a < strlen(up); ++a) {
 101                         if ( (ptr[0] == '&') || (ptr[0] == '?') ) {
 102                                 b = a;
 103                                 break;
 104                         }
 105                         ++ptr;
 106                 }
 107                 ptr = up;
 108                 for (a = 0; a < b; ++a)
 109                         ++ptr;
 110                 strcpy(ptr, "");
 111
 112                 u->url_data = malloc(strlen(up) + 2);
 113                 strcpy(u->url_data, up);
 114                 u->url_data[b] = 0;
 115                 unescape_input(u->url_data);
 116                 up = ptr;
 117                 ++up;
 118         }
 119 }
 120
 121 void free_urls(void)
 122 {
 123         struct urlcontent *u;
 124
 125         while (WC->urlstrings != NULL) {
 126                 free(WC->urlstrings->url_data);
 127                 u = WC->urlstrings->next;
 128                 free(WC->urlstrings);
 129                 WC->urlstrings = u;
 130         }
 131 }
 132
 133 /*
 134  * Diagnostic function to display the contents of all variables
 135  */
 136 void dump_vars(void)
 137 {
 138         struct urlcontent *u;
 139
 140         for (u = WC->urlstrings; u != NULL; u = u->next) {
 141                 wprintf("%38s = %s\n", u->url_key, u->url_data);
 142         }
 143 }
 144
 145 char *bstr(char *key)
 146 {
 147         struct urlcontent *u;
 148
 149         for (u = WC->urlstrings; u != NULL; u = u->next) {
 150                 if (!strcasecmp(u->url_key, key))
 151                         return (u->url_data);
 152         }
 153         return ("");
 154 }
 155
 156
 157 void wprintf(const char *format,...)
 158 {
 159         va_list arg_ptr;
 160         char wbuf[4096];
 161
 162         va_start(arg_ptr, format);
 163         vsnprintf(wbuf, sizeof wbuf, format, arg_ptr);
 164         va_end(arg_ptr);
 165
 166         client_write(wbuf, strlen(wbuf));
 167 }
 168
 169
 170 /*
 171  * wDumpContent() wraps up an HTTP session, closes tags, etc.
 172  *
 173  * print_standard_html_footer should be set to 0 to transmit only, 1 to
 174  * append the main menu and closing tags, or 2 to
 175  * append the closing tags only.
 176  */
 177 void wDumpContent(int print_standard_html_footer)
 178 {
 179         if (print_standard_html_footer) {
 180                 wprintf("</DIV>\n");    /* end of "text" div */
 181                 do_template("trailing");
 182         }
 183
 184 }
 185
 186
 187 /*
 188  * Copy a string, escaping characters which have meaning in HTML.  If
 189  * nbsp is nonzero, spaces are converted to non-breaking spaces.
 190  */
 191 void stresc(char *target, char *strbuf, int nbsp, int nolinebreaks)
 192 {
 193         int a;
 194         strcpy(target, "");
 195
 196         for (a = 0; a < strlen(strbuf); ++a) {
 197                 if (strbuf[a] == '<')
 198                         strcat(target, "&lt;");
 199                 else if (strbuf[a] == '>')
 200                         strcat(target, "&gt;");
 201                 else if (strbuf[a] == '&')
 202                         strcat(target, "&amp;");
 203                 else if (strbuf[a] == '\"')
 204                         strcat(target, "&quot;");
 205                 else if (strbuf[a] == '\'')
 206                         strcat(target, "&#39;");
 207                 else if (strbuf[a] == LB)
 208                         strcat(target, "<");
 209                 else if (strbuf[a] == RB)
 210                         strcat(target, ">");
 211                 else if (strbuf[a] == QU)
 212                         strcat(target, "\"");
 213                 else if ((strbuf[a] == 32) && (nbsp == 1))
 214                         strcat(target, "&nbsp;");
 215                 else if ((strbuf[a] == '\n') && (nolinebreaks))
 216                         strcat(target, "");     /* nothing */
 217                 else if ((strbuf[a] == '\r') && (nolinebreaks))
 218                         strcat(target, "");     /* nothing */
 219                 else
 220                         strncat(target, &strbuf[a], 1);
 221         }
 222 }
 223
 224 void escputs1(char *strbuf, int nbsp, int nolinebreaks)
 225 {
 226         char *buf;
 227
 228         if (strbuf == NULL) return;
 229         buf = malloc( (3 * strlen(strbuf)) + SIZ );
 230         stresc(buf, strbuf, nbsp, nolinebreaks);
 231         wprintf("%s", buf);
 232         free(buf);
 233 }
 234
 235 void escputs(char *strbuf)
 236 {
 237         escputs1(strbuf, 0, 0);
 238 }
 239
 240 /*
 241  * Escape a string for feeding out as a URL.
 242  * Returns a pointer to a buffer that must be freed by the caller!
 243  */
 244 void urlesc(char *outbuf, char *strbuf)
 245 {
 246         int a, b, c;
 247         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 248
 249         strcpy(outbuf, "");
 250
 251         for (a = 0; a < strlen(strbuf); ++a) {
 252                 c = 0;
 253                 for (b = 0; b < strlen(ec); ++b) {
 254                         if (strbuf[a] == ec[b])
 255                                 c = 1;
 256                 }
 257                 b = strlen(outbuf);
 258                 if (c == 1)
 259                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 260                 else
 261                         sprintf(&outbuf[b], "%c", strbuf[a]);
 262         }
 263 }
 264
 265 void urlescputs(char *strbuf)
 266 {
 267         char outbuf[SIZ];
 268
 269         urlesc(outbuf, strbuf);
 270         wprintf("%s", outbuf);
 271 }
 272
 273
 274 /*
 275  * Copy a string, escaping characters for JavaScript strings.
 276  */
 277 void jsesc(char *target, char *strbuf)
 278 {
 279         int a;
 280         strcpy(target, "");
 281
 282         for (a = 0; a < strlen(strbuf); ++a) {
 283                 if (strbuf[a] == '<')
 284                         strcat(target, "[");
 285                 else if (strbuf[a] == '>')
 286                         strcat(target, "]");
 287                 else if (strbuf[a] == '\"')
 288                         strcat(target, "&quot;");
 289                 else if (strbuf[a] == '&')
 290                         strcat(target, "&amp;;");
 291                 else if (strbuf[a] == '\'')
 292                         strcat(target, "\\'");
 293                 else {
 294                         strncat(target, &strbuf[a], 1);
 295                 }
 296         }
 297 }
 298
 299 void jsescputs(char *strbuf)
 300 {
 301         char outbuf[SIZ];
 302
 303         jsesc(outbuf, strbuf);
 304         wprintf("%s", outbuf);
 305 }
 306
 307 /*
 308  * Copy a string, escaping characters for message text hold
 309  */
 310 void msgesc(char *target, char *strbuf)
 311 {
 312         int a;
 313         strcpy(target, "");
 314
 315         for (a = 0; a < strlen(strbuf); ++a) {
 316                 if (strbuf[a] == '\'')
 317                         strcat(target, "\\'");
 318                 else if (strbuf[a] == '\n')
 319                         strcat(target, " ");
 320                 else if (strbuf[a] == '\r')
 321                         strcat(target, " ");
 322                 else {
 323                         strncat(target, &strbuf[a], 1);
 324                 }
 325         }
 326 }
 327
 328 void msgescputs(char *strbuf) {
 329         char *outbuf;
 330
 331         if (strbuf == NULL) return;
 332         outbuf = malloc( (3 * strlen(strbuf)) + SIZ);
 333         msgesc(outbuf, strbuf);
 334         wprintf("%s", outbuf);
 335         free(outbuf);
 336 }
 337
 338
 339
 340
 341 /*
 342  * Output all that important stuff that the browser will want to see
 343  */
 344 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 345                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 346
 347                         int do_room_banner,     /* 0=no, 1=yes,                                     */
 348                                                 /* 2 = I'm going to embed my own, so don't open the */
 349                                                 /*     <div id="text"> either.                      */
 350
 351                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 352                         int refresh30,          /* 1 = automatically refresh page every 30 seconds  */
 353                         int suppress_check,     /* 1 = suppress check for instant messages          */
 354                         int cache               /* 1 = allow browser to cache this page             */
 355 ) {
 356         char cookie[SIZ];
 357         char httpnow[SIZ];
 358
 359         wprintf("HTTP/1.0 200 OK\n");
 360         httpdate(httpnow, time(NULL));
 361
 362         if (do_httpheaders) {
 363                 wprintf("Content-type: text/html\n"
 364                         "Server: %s\n", SERVER
 365                 );
 366                 if (!cache)
 367                         wprintf("Connection: close\n"
 368                                 "Pragma: no-cache\n"
 369                                 "Cache-Control: no-store\n"
 370                         );
 371         }
 372
 373         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 374                         WC->wc_password, WC->wc_roomname);
 375
 376         if (unset_cookies) {
 377                 wprintf("Set-cookie: webcit=%s; path=/\n", unset);
 378         } else {
 379                 wprintf("Set-cookie: webcit=%s; path=/\n", cookie);
 380                 if (server_cookie != NULL) {
 381                         wprintf("%s\n", server_cookie);
 382                 }
 383         }
 384
 385         if (do_htmlhead) {
 386                 wprintf("\n");
 387
 388                 if (refresh30) {
 389                         svprintf("REFRESHTAG", WCS_STRING, "%s",
 390                                 "<meta http-equiv=\"refresh\" content=\"30\" />\n");
 391                 }
 392                 else {
 393                         svprintf("REFRESHTAG", WCS_STRING, "%s",
 394                                 "<meta http-equiv=\"refresh\" content=\"500363689;\" />\n");
 395                 }
 396
 397                 do_template("head");
 398         }
 399
 400         /* ICONBAR */
 401         if (do_htmlhead) {
 402
 403                 if (WC->HaveInstantMessages) {
 404                         wprintf("<div id=\"page_popup\">\n");
 405                         page_popup();
 406                         wprintf("</div>\n");
 407                 }
 408                 if ( (WC->logged_in) && (!unset_cookies) ) {
 409                         wprintf("<div id=\"iconbar\">");
 410                         do_iconbar();
 411                         wprintf("</div>\n");
 412                 }
 413                 if (do_room_banner == 1) {
 414                         wprintf("<div id=\"banner\">\n");
 415                         embed_room_banner(NULL, navbar_default);
 416                         wprintf("</div>\n");
 417                 }
 418         }
 419
 420         if (do_room_banner != 2) {
 421                 wprintf("<div id=\"content\">\n");
 422
 423
 424                 if (strlen(WC->ImportantMessage) > 0) {
 425                         do_template("beginbox_nt");
 426                         wprintf("<SPAN CLASS=\"errormsg\">"
 427                                 "%s</SPAN><br />\n", WC->ImportantMessage);
 428                         do_template("endbox");
 429                         strcpy(WC->ImportantMessage, "");
 430                 }
 431
 432         }
 433 }
 434
 435
 436 /*
 437  * Generic function to do an HTTP redirect.  Easy and fun.
 438  */
 439 void http_redirect(char *whichpage) {
 440         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 441         wprintf("Location: %s\n", whichpage);
 442         wprintf("URI: %s\n", whichpage);
 443         wprintf("Content-type: text/html\n\n");
 444         wprintf("<html><body>\n");
 445         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 446                 whichpage);
 447         wprintf("</body></html>\n");
 448 }
 449
 450
 451
 452 void check_for_instant_messages()
 453 {
 454         char buf[SIZ];
 455
 456         serv_puts("NOOP");
 457         serv_gets(buf);
 458         if (buf[3] == '*') WC->HaveInstantMessages = 1;
 459 }
 460
 461
 462
 463
 464 /*
 465  * Output a piece of content to the web browser
 466  */
 467 void http_transmit_thing(char *thing, size_t length, char *content_type,
 468                          int is_static) {
 469         if (is_static) {
 470                 output_headers(0, 0, 0, 0, 0, 0, 1);
 471         }
 472         else {
 473                 output_headers(0, 0, 0, 0, 0, 0, 0);
 474         }
 475         wprintf("Content-type: %s\n"
 476                 "Content-length: %ld\n"
 477                 "Server: %s\n"
 478                 "Connection: close\n"
 479                 "\n",
 480                 content_type,
 481                 (long) length,
 482                 SERVER
 483         );
 484         client_write(thing, (size_t)length);
 485 }
 486
 487
 488
 489
 490 void output_static(char *what)
 491 {
 492         char buf[4096];
 493         FILE *fp;
 494         struct stat statbuf;
 495         off_t bytes;
 496         char *bigbuffer;
 497         char content_type[SIZ];
 498
 499         sprintf(buf, "static/%s", what);
 500         fp = fopen(buf, "rb");
 501         if (fp == NULL) {
 502                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 503                 wprintf("Content-Type: text/plain\n");
 504                 wprintf("\n");
 505                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 506         } else {
 507                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 508                         strcpy(content_type, "image/gif");
 509                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 510                         strcpy(content_type, "text/plain");
 511                 else if (!strncasecmp(&what[strlen(what) - 4], ".css", 4))
 512                         strcpy(content_type, "text/css");
 513                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 514                         strcpy(content_type, "image/jpeg");
 515                 else if (!strncasecmp(&what[strlen(what) - 4], ".png", 4))
 516                         strcpy(content_type, "image/png");
 517                 else if (!strncasecmp(&what[strlen(what) - 4], ".ico", 4))
 518                         strcpy(content_type, "image/x-icon");
 519                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 520                         strcpy(content_type, "text/html");
 521                 else if (!strncasecmp(&what[strlen(what) - 4], ".htm", 4))
 522                         strcpy(content_type, "text/html");
 523                 else if (!strncasecmp(&what[strlen(what) - 4], ".wml", 4))
 524                         strcpy(content_type, "text/vnd.wap.wml");
 525                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmls", 5))
 526                         strcpy(content_type, "text/vnd.wap.wmlscript");
 527                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmlc", 5))
 528                         strcpy(content_type, "application/vnd.wap.wmlc");
 529                 else if (!strncasecmp(&what[strlen(what) - 6], ".wmlsc", 6))
 530                         strcpy(content_type, "application/vnd.wap.wmlscriptc");
 531                 else if (!strncasecmp(&what[strlen(what) - 5], ".wbmp", 5))
 532                         strcpy(content_type, "image/vnd.wap.wbmp");
 533                 else if (!strncasecmp(&what[strlen(what) - 3], ".js", 3))
 534                         strcpy(content_type, "text/javascript");
 535                 else
 536                         strcpy(content_type, "application/octet-stream");
 537
 538                 fstat(fileno(fp), &statbuf);
 539                 bytes = statbuf.st_size;
 540                 lprintf(3, "Static: %s, (%s; %ld bytes)\n", what, content_type, bytes);
 541                 bigbuffer = malloc(bytes + 2);
 542                 fread(bigbuffer, bytes, 1, fp);
 543                 fclose(fp);
 544
 545                 http_transmit_thing(bigbuffer, (size_t)bytes, content_type, 1);
 546                 free(bigbuffer);
 547         }
 548         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 549                 end_webcit_session();
 550         }
 551 }
 552
 553
 554 /*
 555  * When the browser requests an image file from the Citadel server,
 556  * this function is called to transmit it.
 557  */
 558 void output_image()
 559 {
 560         char buf[SIZ];
 561         char *xferbuf = NULL;
 562         off_t bytes;
 563
 564         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 565         serv_gets(buf);
 566         if (buf[0] == '2') {
 567                 bytes = extract_long(&buf[4], 0);
 568                 xferbuf = malloc(bytes + 2);
 569
 570                 /* Read it from the server */
 571                 read_server_binary(xferbuf, bytes);
 572                 serv_puts("CLOS");
 573                 serv_gets(buf);
 574
 575                 /* Write it to the browser */
 576                 http_transmit_thing(xferbuf, (size_t)bytes, "image/gif", 0);
 577                 free(xferbuf);
 578
 579         } else {
 580
 581                 /* Instead of an ugly 404, send a 1x1 transparent GIF
 582                  * when there's no such image on the server.
 583                  */
 584                 output_static("blank.gif");
 585
 586                 /*
 587                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 588                 output_headers(0, 0, 0, 0, 0, 0, 0);
 589                 wprintf("Content-Type: text/plain\n"
 590                         "\n"
 591                         "Error retrieving image: %s\n",
 592                         &buf[4]
 593                 );
 594                 */
 595
 596         }
 597
 598
 599
 600 }
 601
 602 /*
 603  */
 604 void output_mimepart()
 605 {
 606         char buf[SIZ];
 607         off_t bytes;
 608         char content_type[SIZ];
 609         char *content = NULL;
 610
 611         serv_printf("OPNA %s|%s", bstr("msgnum"), bstr("partnum"));
 612         serv_gets(buf);
 613         if (buf[0] == '2') {
 614                 bytes = extract_long(&buf[4], 0);
 615                 content = malloc(bytes + 2);
 616                 extract(content_type, &buf[4], 3);
 617                 output_headers(0, 0, 0, 0, 0, 0, 0);
 618                 read_server_binary(content, bytes);
 619                 serv_puts("CLOS");
 620                 serv_gets(buf);
 621                 http_transmit_thing(content, bytes, content_type, 0);
 622                 free(content);
 623         } else {
 624                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 625                 output_headers(0, 0, 0, 0, 0, 0, 0);
 626                 wprintf("Content-Type: text/plain\n");
 627                 wprintf("\n");
 628                 wprintf("Error retrieving part: %s\n", &buf[4]);
 629         }
 630
 631 }
 632
 633
 634 /*
 635  */
 636 char *load_mimepart(long msgnum, char *partnum)
 637 {
 638         char buf[SIZ];
 639         off_t bytes;
 640         char content_type[SIZ];
 641         char *content;
 642
 643         serv_printf("OPNA %ld|%s", msgnum, partnum);
 644         serv_gets(buf);
 645         if (buf[0] == '2') {
 646                 bytes = extract_long(&buf[4], 0);
 647                 extract(content_type, &buf[4], 3);
 648
 649                 content = malloc(bytes + 2);
 650                 read_server_binary(content, bytes);
 651
 652                 serv_puts("CLOS");
 653                 serv_gets(buf);
 654                 content[bytes] = 0;     /* null terminate for good measure */
 655                 return(content);
 656         }
 657         else {
 658                 return(NULL);
 659         }
 660
 661 }
 662
 663
 664 /*
 665  * Convenience functions to display a page containing only a string
 666  */
 667 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 668 {
 669         wprintf("HTTP/1.0 200 OK\n");
 670         output_headers(1, 1, 2, 0, 0, 0, 0);
 671         wprintf("<div id=\"banner\">\n");
 672         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#%s\"><TR><TD>", titlebarcolor);
 673         wprintf("<SPAN CLASS=\"titlebar\">%s</SPAN>\n", titlebarmsg);
 674         wprintf("</TD></TR></TABLE>\n");
 675         wprintf("</div>\n<div id=\"content\">\n");
 676         escputs(messagetext);
 677
 678         wprintf("<hr />\n");
 679         wDumpContent(1);
 680 }
 681
 682
 683 /*
 684  * Display a blank page.
 685  */
 686 void blank_page(void) {
 687         output_headers(1, 1, 0, 0, 1, 0, 0);
 688         wDumpContent(2);
 689 }
 690
 691
 692 /*
 693  * A template has been requested
 694  */
 695 void url_do_template(void) {
 696         do_template(bstr("template"));
 697 }
 698
 699
 700
 701 /*
 702  * Offer to make any page the user's "start page."
 703  */
 704 void offer_start_page(void) {
 705         wprintf("<A HREF=\"/change_start_page?startpage=");
 706         urlescputs(WC->this_page);
 707         wprintf("\">"
 708                 "<FONT SIZE=-2 COLOR=\"#AAAAAA\">Make this my start page</FONT>"
 709                 "</A>"
 710         );
 711 }
 712
 713
 714 /*
 715  * Change the user's start page
 716  */
 717 void change_start_page(void) {
 718
 719         if (bstr("startpage") == NULL) {
 720                 strcpy(WC->ImportantMessage,
 721                         "startpage set to null");
 722                 display_main_menu();
 723                 return;
 724         }
 725
 726         set_preference("startpage", bstr("startpage"));
 727
 728         output_headers(1, 1, 0, 0, 0, 0, 0);
 729         do_template("newstartpage");
 730         wDumpContent(1);
 731 }
 732
 733
 734
 735
 736 void display_success(char *successmessage)
 737 {
 738         convenience_page("007700", "OK", successmessage);
 739 }
 740
 741
 742
 743 void extract_action(char *actbuf, char *cmdbuf)
 744 {
 745         int i;
 746
 747         strcpy(actbuf, cmdbuf);
 748         if (!strncasecmp(actbuf, "GET /", 5))
 749                 strcpy(actbuf, &actbuf[5]);
 750         if (!strncasecmp(actbuf, "PUT /", 5))
 751                 strcpy(actbuf, &actbuf[5]);
 752         if (!strncasecmp(actbuf, "POST /", 6))
 753                 strcpy(actbuf, &actbuf[6]);
 754
 755         for (i = 0; i < strlen(actbuf); ++i) {
 756                 if (actbuf[i] == ' ') {
 757                         actbuf[i] = 0;
 758                         i = 0;
 759                 }
 760                 if (actbuf[i] == '/') {
 761                         actbuf[i] = 0;
 762                         i = 0;
 763                 }
 764                 if (actbuf[i] == '?') {
 765                         actbuf[i] = 0;
 766                         i = 0;
 767                 }
 768                 if (actbuf[i] == '&') {
 769                         actbuf[i] = 0;
 770                         i = 0;
 771                 }
 772         }
 773 }
 774
 775
 776 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 777                         void *content, char *cbtype, size_t length,
 778                         char *encoding, void *userdata)
 779 {
 780         struct urlcontent *u;
 781
 782         /* Form fields */
 783         if ( (length > 0) && (strlen(cbtype) == 0) ) {
 784                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
 785                 u->next = WC->urlstrings;
 786                 WC->urlstrings = u;
 787                 safestrncpy(u->url_key, name, sizeof(u->url_key));
 788                 u->url_data = malloc(length + 1);
 789                 memcpy(u->url_data, content, length);
 790                 u->url_data[length] = 0;
 791         }
 792
 793         /* Uploaded files */
 794         if ( (length > 0) && (strlen(cbtype) > 0) ) {
 795                 WC->upload = malloc(length);
 796                 if (WC->upload != NULL) {
 797                         WC->upload_length = length;
 798                         safestrncpy(WC->upload_filename, filename,
 799                                         sizeof(WC->upload_filename));
 800                         safestrncpy(WC->upload_content_type, cbtype,
 801                                         sizeof(WC->upload_content_type));
 802                         memcpy(WC->upload, content, length);
 803                 }
 804                 else {
 805                         lprintf(3, "malloc() failed: %s\n", strerror(errno));
 806                 }
 807         }
 808
 809 }
 810
 811
 812
 813
 814 /*
 815  * Entry point for WebCit transaction
 816  */
 817 void session_loop(struct httprequest *req)
 818 {
 819         char cmd[SIZ];
 820         char method[SIZ];
 821         char action[SIZ];
 822         char buf[SIZ];
 823         int a, b;
 824         int ContentLength = 0;
 825         int BytesRead = 0;
 826         char ContentType[512];
 827         char *content;
 828         char *content_end;
 829         struct httprequest *hptr;
 830         char browser_host[SIZ];
 831         char user_agent[SIZ];
 832         int body_start;
 833
 834         /* We stuff these with the values coming from the client cookies,
 835          * so we can use them to reconnect a timed out session if we have to.
 836          */
 837         char c_username[SIZ];
 838         char c_password[SIZ];
 839         char c_roomname[SIZ];
 840         char c_httpauth_string[SIZ];
 841         char c_httpauth_user[SIZ];
 842         char c_httpauth_pass[SIZ];
 843         char cookie[SIZ];
 844
 845         strcpy(c_username, "");
 846         strcpy(c_password, "");
 847         strcpy(c_roomname, "");
 848         strcpy(c_httpauth_string, "");
 849         strcpy(c_httpauth_user, "");
 850         strcpy(c_httpauth_pass, "");
 851
 852         WC->upload_length = 0;
 853         WC->upload = NULL;
 854         WC->vars = NULL;
 855
 856         WC->is_wap = 0;
 857
 858         hptr = req;
 859         if (hptr == NULL) return;
 860
 861         strcpy(cmd, hptr->line);
 862         hptr = hptr->next;
 863         extract_token(method, cmd, 0, ' ');
 864         extract_action(action, cmd);
 865
 866         while (hptr != NULL) {
 867                 strcpy(buf, hptr->line);
 868                 hptr = hptr->next;
 869
 870                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 871                         safestrncpy(cookie, &buf[15], sizeof cookie);
 872                         cookie_to_stuff(cookie, NULL,
 873                                       c_username, c_password, c_roomname);
 874                 }
 875                 else if (!strncasecmp(buf, "Authorization: Basic ", 21)) {
 876                         CtdlDecodeBase64(c_httpauth_string, &buf[21], strlen(&buf[21]));
 877                         extract_token(c_httpauth_user, c_httpauth_string, 0, ':');
 878                         extract_token(c_httpauth_pass, c_httpauth_string, 1, ':');
 879                 }
 880                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 881                         ContentLength = atoi(&buf[16]);
 882                 }
 883                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 884                         safestrncpy(ContentType, &buf[14], sizeof ContentType);
 885                 }
 886                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 887                         safestrncpy(user_agent, &buf[12], sizeof user_agent);
 888                 }
 889                 else if (!strncasecmp(buf, "Host: ", 6)) {
 890                         safestrncpy(WC->http_host, &buf[6], sizeof WC->http_host);
 891                 }
 892                 /* Only WAP gateways explicitly name this content-type */
 893                 else if (strstr(buf, "text/vnd.wap.wml")) {
 894                         WC->is_wap = 1;
 895                 }
 896         }
 897
 898         if (ContentLength > 0) {
 899                 content = malloc(ContentLength + SIZ);
 900                 memset(content, 0, ContentLength + SIZ);
 901                 sprintf(content, "Content-type: %s\n"
 902                                 "Content-length: %d\n\n",
 903                                 ContentType, ContentLength);
 904                 body_start = strlen(content);
 905
 906                 /* Be daring and read it all at once. */
 907                 client_read(WC->http_sock, &content[BytesRead+body_start],
 908                         ContentLength);
 909
 910                 if (!strncasecmp(ContentType,
 911                               "application/x-www-form-urlencoded", 33)) {
 912                         addurls(&content[body_start]);
 913                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 914                         content_end = content + ContentLength + body_start;
 915                         mime_parser(content, content_end, *upload_handler,
 916                                         NULL, NULL, NULL, 0);
 917                 }
 918         } else {
 919                 content = NULL;
 920         }
 921
 922         /* make a note of where we are in case the user wants to save it */
 923         safestrncpy(WC->this_page, cmd, sizeof(WC->this_page));
 924         remove_token(WC->this_page, 2, ' ');
 925         remove_token(WC->this_page, 0, ' ');
 926
 927         /* If there are variables in the URL, we must grab them now */
 928         for (a = 0; a < strlen(cmd); ++a) {
 929                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 930                         for (b = a; b < strlen(cmd); ++b)
 931                                 if (isspace(cmd[b]))
 932                                         cmd[b] = 0;
 933                         addurls(&cmd[a + 1]);
 934                         cmd[a] = 0;
 935                 }
 936         }
 937
 938         /* Static content can be sent without connecting to Citadel. */
 939         if (!strcasecmp(action, "static")) {
 940                 strcpy(buf, &cmd[12]);
 941                 for (a = 0; a < strlen(buf); ++a)
 942                         if (isspace(buf[a]))
 943                                 buf[a] = 0;
 944                 output_static(buf);
 945                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
 946         }
 947
 948         /*
 949          * If we're not connected to a Citadel server, try to hook up the
 950          * connection now.
 951          */
 952         if (!WC->connected) {
 953                 if (!strcasecmp(ctdlhost, "uds")) {
 954                         /* unix domain socket */
 955                         sprintf(buf, "%s/citadel.socket", ctdlport);
 956                         WC->serv_sock = uds_connectsock(buf);
 957                 }
 958                 else {
 959                         /* tcp socket */
 960                         WC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 961                 }
 962
 963                 if (WC->serv_sock < 0) {
 964                         do_logout();
 965                         goto SKIP_ALL_THIS_CRAP;
 966                 }
 967                 else {
 968                         WC->connected = 1;
 969                         serv_gets(buf); /* get the server welcome message */
 970                         locate_host(browser_host, WC->http_sock);
 971                         get_serv_info(browser_host, user_agent);
 972                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
 973                                 wprintf("You are connected to a Citadel "
 974                                         "server running Citadel %d.%02d;\nin "
 975                                         "order to run this version of WebCit "
 976                                         "you must also have Citadel %d.%02d or"
 977                                         " newer.\n\n\n",
 978                                                 serv_info.serv_rev_level / 100,
 979                                                 serv_info.serv_rev_level % 100,
 980                                                 MINIMUM_CIT_VERSION / 100,
 981                                                 MINIMUM_CIT_VERSION % 100
 982                                         );
 983                                 end_webcit_session();
 984                                 goto SKIP_ALL_THIS_CRAP;
 985                         }
 986                 }
 987         }
 988
 989         /*
 990          * Functions which can be performed without logging in
 991          */
 992         if (!strcasecmp(action, "listsub")) {
 993                 do_listsub();
 994                 goto SKIP_ALL_THIS_CRAP;
 995         }
 996 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
 997         if (!strcasecmp(action, "freebusy")) {
 998                 do_freebusy(cmd);
 999                 goto SKIP_ALL_THIS_CRAP;
1000         }
1001 #endif
1002
1003         /*
1004          * If we're not logged in, but we have HTTP Authentication data,
1005          * try logging in to Citadel using that.
1006          */
1007         if ((!WC->logged_in) && (strlen(c_httpauth_user) > 0) && (strlen(c_httpauth_pass) > 0)) {
1008                 serv_printf("USER %s", c_httpauth_user);
1009                 serv_gets(buf);
1010                 if (buf[0] == '3') {
1011                         serv_printf("PASS %s", c_httpauth_pass);
1012                         serv_gets(buf);
1013                         if (buf[0] == '2') {
1014                                 become_logged_in(c_httpauth_user, c_httpauth_pass, buf);
1015                                 strcpy(WC->httpauth_user, c_httpauth_user);
1016                                 strcpy(WC->httpauth_pass, c_httpauth_pass);
1017                         }
1018                 }
1019         }
1020
1021         /*
1022          * The GroupDAV stuff relies on HTTP authentication instead of
1023          * our session's authentication.
1024          */
1025         if (!strncasecmp(action, "groupdav", 8)) {
1026                 groupdav_main(req);
1027                 goto SKIP_ALL_THIS_CRAP;
1028         }
1029
1030         check_for_instant_messages();
1031
1032         /*
1033          * If we're not logged in, but we have username and password cookies
1034          * supplied by the browser, try using them to log in.
1035          */
1036         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
1037                 serv_printf("USER %s", c_username);
1038                 serv_gets(buf);
1039                 if (buf[0] == '3') {
1040                         serv_printf("PASS %s", c_password);
1041                         serv_gets(buf);
1042                         if (buf[0] == '2') {
1043                                 become_logged_in(c_username, c_password, buf);
1044                         }
1045                 }
1046         }
1047         /*
1048          * If we don't have a current room, but a cookie specifying the
1049          * current room is supplied, make an effort to go there.
1050          */
1051         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
1052                 serv_printf("GOTO %s", c_roomname);
1053                 serv_gets(buf);
1054                 if (buf[0] == '2') {
1055                         strcpy(WC->wc_roomname, c_roomname);
1056                 }
1057         }
1058
1059         if (!strcasecmp(action, "image")) {
1060                 output_image();
1061
1062         /*
1063          * All functions handled below this point ... make sure we log in
1064          * before doing anything else!
1065          */
1066         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
1067                 do_login();
1068         } else if (!WC->logged_in) {
1069                 display_login(NULL);
1070         }
1071
1072         /*
1073          * Various commands...
1074          */
1075
1076         else if (!strcasecmp(action, "do_welcome")) {
1077                 do_welcome();
1078         } else if (!strcasecmp(action, "blank")) {
1079                 blank_page();
1080         } else if (!strcasecmp(action, "do_template")) {
1081                 url_do_template();
1082         } else if (!strcasecmp(action, "display_main_menu")) {
1083                 display_main_menu();
1084         } else if (!strcasecmp(action, "whobbs")) {
1085                 whobbs();
1086         } else if (!strcasecmp(action, "knrooms")) {
1087                 knrooms();
1088         } else if (!strcasecmp(action, "gotonext")) {
1089                 slrp_highest();
1090                 gotonext();
1091         } else if (!strcasecmp(action, "skip")) {
1092                 gotonext();
1093         } else if (!strcasecmp(action, "ungoto")) {
1094                 ungoto();
1095         } else if (!strcasecmp(action, "dotgoto")) {
1096                 slrp_highest();
1097                 smart_goto(bstr("room"));
1098         } else if (!strcasecmp(action, "dotskip")) {
1099                 smart_goto(bstr("room"));
1100         } else if (!strcasecmp(action, "termquit")) {
1101                 do_logout();
1102         } else if (!strcasecmp(action, "readnew")) {
1103                 readloop("readnew");
1104         } else if (!strcasecmp(action, "readold")) {
1105                 readloop("readold");
1106         } else if (!strcasecmp(action, "readfwd")) {
1107                 readloop("readfwd");
1108         } else if (!strcasecmp(action, "headers")) {
1109                 readloop("headers");
1110         } else if (!strcasecmp(action, "display_enter")) {
1111                 display_enter();
1112         } else if (!strcasecmp(action, "post")) {
1113                 post_message();
1114         } else if (!strcasecmp(action, "do_stuff_to_one_msg")) {
1115                 do_stuff_to_one_msg();
1116         } else if (!strcasecmp(action, "move_msg")) {
1117                 move_msg();
1118         } else if (!strcasecmp(action, "userlist")) {
1119                 userlist();
1120         } else if (!strcasecmp(action, "showuser")) {
1121                 showuser();
1122         } else if (!strcasecmp(action, "display_page")) {
1123                 display_page();
1124         } else if (!strcasecmp(action, "page_user")) {
1125                 page_user();
1126         } else if (!strcasecmp(action, "chat")) {
1127                 do_chat();
1128         } else if (!strcasecmp(action, "display_private")) {
1129                 display_private("", 0);
1130         } else if (!strcasecmp(action, "goto_private")) {
1131                 goto_private();
1132         } else if (!strcasecmp(action, "zapped_list")) {
1133                 zapped_list();
1134         } else if (!strcasecmp(action, "display_zap")) {
1135                 display_zap();
1136         } else if (!strcasecmp(action, "zap")) {
1137                 zap();
1138         } else if (!strcasecmp(action, "display_entroom")) {
1139                 display_entroom();
1140         } else if (!strcasecmp(action, "entroom")) {
1141                 entroom();
1142         } else if (!strcasecmp(action, "display_editroom")) {
1143                 display_editroom();
1144         } else if (!strcasecmp(action, "netedit")) {
1145                 netedit();
1146         } else if (!strcasecmp(action, "editroom")) {
1147                 editroom();
1148         } else if (!strcasecmp(action, "display_whok")) {
1149                 display_whok();
1150         } else if (!strcasecmp(action, "display_editinfo")) {
1151                 display_edit("Room info", "EINF 0", "RINF", "/editinfo", 1);
1152         } else if (!strcasecmp(action, "editinfo")) {
1153                 save_edit("Room info", "EINF 1", 1);
1154         } else if (!strcasecmp(action, "display_editbio")) {
1155                 sprintf(buf, "RBIO %s", WC->wc_username);
1156                 display_edit("Your bio", "NOOP", buf, "editbio", 3);
1157         } else if (!strcasecmp(action, "editbio")) {
1158                 save_edit("Your bio", "EBIO", 0);
1159         } else if (!strcasecmp(action, "confirm_delete_room")) {
1160                 confirm_delete_room();
1161         } else if (!strcasecmp(action, "delete_room")) {
1162                 delete_room();
1163         } else if (!strcasecmp(action, "validate")) {
1164                 validate();
1165         } else if (!strcasecmp(action, "display_editpic")) {
1166                 display_graphics_upload("your photo",
1167                                         "UIMG 0|_userpic_",
1168                                         "/editpic");
1169         } else if (!strcasecmp(action, "editpic")) {
1170                 do_graphics_upload("UIMG 1|_userpic_");
1171         } else if (!strcasecmp(action, "display_editroompic")) {
1172                 display_graphics_upload("the graphic for this room",
1173                                         "UIMG 0|_roompic_",
1174                                         "/editroompic");
1175         } else if (!strcasecmp(action, "editroompic")) {
1176                 do_graphics_upload("UIMG 1|_roompic_");
1177         } else if (!strcasecmp(action, "delete_floor")) {
1178                 delete_floor();
1179         } else if (!strcasecmp(action, "rename_floor")) {
1180                 rename_floor();
1181         } else if (!strcasecmp(action, "create_floor")) {
1182                 create_floor();
1183         } else if (!strcasecmp(action, "display_editfloorpic")) {
1184                 sprintf(buf, "UIMG 0|_floorpic_|%s",
1185                         bstr("which_floor"));
1186                 display_graphics_upload("the graphic for this floor",
1187                                         buf,
1188                                         "/editfloorpic");
1189         } else if (!strcasecmp(action, "editfloorpic")) {
1190                 sprintf(buf, "UIMG 1|_floorpic_|%s",
1191                         bstr("which_floor"));
1192                 do_graphics_upload(buf);
1193         } else if (!strcasecmp(action, "display_reg")) {
1194                 display_reg(0);
1195         } else if (!strcasecmp(action, "display_changepw")) {
1196                 display_changepw();
1197         } else if (!strcasecmp(action, "changepw")) {
1198                 changepw();
1199         } else if (!strcasecmp(action, "display_edit_node")) {
1200                 display_edit_node();
1201         } else if (!strcasecmp(action, "edit_node")) {
1202                 edit_node();
1203         } else if (!strcasecmp(action, "display_netconf")) {
1204                 display_netconf();
1205         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
1206                 display_confirm_delete_node();
1207         } else if (!strcasecmp(action, "delete_node")) {
1208                 delete_node();
1209         } else if (!strcasecmp(action, "display_add_node")) {
1210                 display_add_node();
1211         } else if (!strcasecmp(action, "add_node")) {
1212                 add_node();
1213         } else if (!strcasecmp(action, "terminate_session")) {
1214                 slrp_highest();
1215                 terminate_session();
1216         } else if (!strcasecmp(action, "edit_me")) {
1217                 edit_me();
1218         } else if (!strcasecmp(action, "display_siteconfig")) {
1219                 display_siteconfig();
1220         } else if (!strcasecmp(action, "chat_recv")) {
1221                 chat_recv();
1222         } else if (!strcasecmp(action, "chat_send")) {
1223                 chat_send();
1224         } else if (!strcasecmp(action, "siteconfig")) {
1225                 siteconfig();
1226         } else if (!strcasecmp(action, "display_generic")) {
1227                 display_generic();
1228         } else if (!strcasecmp(action, "do_generic")) {
1229                 do_generic();
1230         } else if (!strcasecmp(action, "display_menubar")) {
1231                 display_menubar(1);
1232         } else if (!strcasecmp(action, "output_mimepart")) {
1233                 output_mimepart();
1234         } else if (!strcasecmp(action, "edit_vcard")) {
1235                 edit_vcard();
1236         } else if (!strcasecmp(action, "submit_vcard")) {
1237                 submit_vcard();
1238         } else if (!strcasecmp(action, "select_user_to_edit")) {
1239                 select_user_to_edit(NULL, NULL);
1240         } else if (!strcasecmp(action, "display_edituser")) {
1241                 display_edituser(NULL, 0);
1242         } else if (!strcasecmp(action, "edituser")) {
1243                 edituser();
1244         } else if (!strcasecmp(action, "create_user")) {
1245                 create_user();
1246         } else if (!strcasecmp(action, "changeview")) {
1247                 change_view();
1248         } else if (!strcasecmp(action, "do_stuff_to_msgs")) {
1249                 do_stuff_to_msgs();
1250         } else if (!strcasecmp(action, "change_start_page")) {
1251                 change_start_page();
1252         } else if (!strcasecmp(action, "display_floorconfig")) {
1253                 display_floorconfig(NULL);
1254         } else if (!strcasecmp(action, "toggle_self_service")) {
1255                 toggle_self_service();
1256 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1257         } else if (!strcasecmp(action, "display_edit_task")) {
1258                 display_edit_task();
1259         } else if (!strcasecmp(action, "save_task")) {
1260                 save_task();
1261         } else if (!strcasecmp(action, "display_edit_event")) {
1262                 display_edit_event();
1263         } else if (!strcasecmp(action, "save_event")) {
1264                 save_event();
1265         } else if (!strcasecmp(action, "respond_to_request")) {
1266                 respond_to_request();
1267         } else if (!strcasecmp(action, "handle_rsvp")) {
1268                 handle_rsvp();
1269 #endif
1270         } else if (!strcasecmp(action, "summary")) {
1271                 summary();
1272         } else if (!strcasecmp(action, "iconbar")) {
1273                 do_iconbar();
1274         } else if (!strcasecmp(action, "display_customize_iconbar")) {
1275                 display_customize_iconbar();
1276         } else if (!strcasecmp(action, "commit_iconbar")) {
1277                 commit_iconbar();
1278         } else if (!strcasecmp(action, "set_room_policy")) {
1279                 set_room_policy();
1280         } else if (!strcasecmp(action, "display_inetconf")) {
1281                 display_inetconf();
1282         } else if (!strcasecmp(action, "save_inetconf")) {
1283                 save_inetconf();
1284         } else if (!strcasecmp(action, "diagnostics")) {
1285                 output_headers(1, 1, 1, 0, 0, 0, 0);
1286
1287                 wprintf("You're in session %d<hr />\n", WC->wc_session);
1288                 wprintf("Command: <br /><PRE>\n");
1289                 escputs(cmd);
1290                 wprintf("</PRE><hr />\n");
1291                 wprintf("Variables: <br /><PRE>\n");
1292                 dump_vars();
1293                 wprintf("</PRE><hr />\n");
1294                 wDumpContent(1);
1295         }
1296         /* When all else fais, display the main menu. */
1297         else {
1298                 display_main_menu();
1299         }
1300
1301 SKIP_ALL_THIS_CRAP:
1302         fflush(stdout);
1303         if (content != NULL) {
1304                 free(content);
1305                 content = NULL;
1306         }
1307         free_urls();
1308         if (WC->upload_length > 0) {
1309                 free(WC->upload);
1310                 WC->upload_length = 0;
1311         }
1312
1313 }