webcit/webcit.c

   1 /*
   2  * $Id$
   3  *
   4  * This is the main transaction loop of the web service.  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  */
   9
  10 #include <ctype.h>
  11 #include <stdlib.h>
  12 #include <unistd.h>
  13 #include <stdio.h>
  14 #include <fcntl.h>
  15 #include <signal.h>
  16 #include <sys/types.h>
  17 #include <sys/wait.h>
  18 #include <sys/socket.h>
  19 #include <sys/time.h>
  20 #include <sys/stat.h>
  21 #include <limits.h>
  22 #include <netinet/in.h>
  23 #include <netdb.h>
  24 #include <string.h>
  25 #include <pwd.h>
  26 #include <errno.h>
  27 #include <stdarg.h>
  28 #include <pthread.h>
  29 #include <signal.h>
  30 #include "webcit.h"
  31 #include "groupdav.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                         b = 0;
  58                         sscanf(hex, "%02x", &b);
  59                         buf[a] = (char) b;
  60                         strcpy(&buf[a + 1], &buf[a + 3]);
  61                 }
  62         }
  63
  64 }
  65
  66
  67 void addurls(char *url)
  68 {
  69         char *up, *ptr;
  70         char buf[SIZ];
  71         int a, b;
  72         struct urlcontent *u;
  73
  74         up = url;
  75         while (strlen(up) > 0) {
  76
  77                 /* locate the = sign */
  78                 safestrncpy(buf, up, sizeof buf);
  79                 b = (-1);
  80                 for (a = 255; a >= 0; --a)
  81                         if (buf[a] == '=')
  82                                 b = a;
  83                 if (b < 0)
  84                         return;
  85                 buf[b] = 0;
  86
  87                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
  88                 u->next = WC->urlstrings;
  89                 WC->urlstrings = u;
  90                 strcpy(u->url_key, buf);
  91
  92                 /* now chop that part off */
  93                 for (a = 0; a <= b; ++a)
  94                         ++up;
  95
  96                 /* locate "&" and "?" delimiters */
  97                 ptr = up;
  98                 b = strlen(up);
  99                 for (a = 0; a < strlen(up); ++a) {
 100                         if ( (ptr[0] == '&') || (ptr[0] == '?') ) {
 101                                 b = a;
 102                                 break;
 103                         }
 104                         ++ptr;
 105                 }
 106                 ptr = up;
 107                 for (a = 0; a < b; ++a)
 108                         ++ptr;
 109                 strcpy(ptr, "");
 110
 111                 u->url_data = malloc(strlen(up) + 2);
 112                 strcpy(u->url_data, up);
 113                 u->url_data[b] = 0;
 114                 unescape_input(u->url_data);
 115                 up = ptr;
 116                 ++up;
 117         }
 118 }
 119
 120 void free_urls(void)
 121 {
 122         struct urlcontent *u;
 123
 124         while (WC->urlstrings != NULL) {
 125                 free(WC->urlstrings->url_data);
 126                 u = WC->urlstrings->next;
 127                 free(WC->urlstrings);
 128                 WC->urlstrings = u;
 129         }
 130 }
 131
 132 /*
 133  * Diagnostic function to display the contents of all variables
 134  */
 135 void dump_vars(void)
 136 {
 137         struct urlcontent *u;
 138
 139         for (u = WC->urlstrings; u != NULL; u = u->next) {
 140                 wprintf("%38s = %s\n", u->url_key, u->url_data);
 141         }
 142 }
 143
 144 char *bstr(char *key)
 145 {
 146         struct urlcontent *u;
 147
 148         for (u = WC->urlstrings; u != NULL; u = u->next) {
 149                 if (!strcasecmp(u->url_key, key))
 150                         return (u->url_data);
 151         }
 152         return ("");
 153 }
 154
 155
 156 void wprintf(const char *format,...)
 157 {
 158         va_list arg_ptr;
 159         char wbuf[4096];
 160
 161         va_start(arg_ptr, format);
 162         vsnprintf(wbuf, sizeof wbuf, format, arg_ptr);
 163         va_end(arg_ptr);
 164
 165         client_write(wbuf, strlen(wbuf));
 166 }
 167
 168
 169 /*
 170  * wDumpContent() wraps up an HTTP session, closes tags, etc.
 171  *
 172  * print_standard_html_footer should be set to 0 to transmit only, 1 to
 173  * append the main menu and closing tags, or 2 to
 174  * append the closing tags only.
 175  */
 176 void wDumpContent(int print_standard_html_footer)
 177 {
 178         if (print_standard_html_footer) {
 179                 wprintf("</DIV>\n");    /* end of "text" div */
 180                 do_template("trailing");
 181         }
 182
 183 }
 184
 185
 186 /*
 187  * Copy a string, escaping characters which have meaning in HTML.  If
 188  * nbsp is nonzero, spaces are converted to non-breaking spaces.
 189  */
 190 void stresc(char *target, char *strbuf, int nbsp, int nolinebreaks)
 191 {
 192         int a;
 193         strcpy(target, "");
 194
 195         for (a = 0; a < strlen(strbuf); ++a) {
 196                 if (strbuf[a] == '<')
 197                         strcat(target, "&lt;");
 198                 else if (strbuf[a] == '>')
 199                         strcat(target, "&gt;");
 200                 else if (strbuf[a] == '&')
 201                         strcat(target, "&amp;");
 202                 else if (strbuf[a] == '\"')
 203                         strcat(target, "&quot;");
 204                 else if (strbuf[a] == '\'')
 205                         strcat(target, "&#39;");
 206                 else if (strbuf[a] == LB)
 207                         strcat(target, "<");
 208                 else if (strbuf[a] == RB)
 209                         strcat(target, ">");
 210                 else if (strbuf[a] == QU)
 211                         strcat(target, "\"");
 212                 else if ((strbuf[a] == 32) && (nbsp == 1))
 213                         strcat(target, "&nbsp;");
 214                 else if ((strbuf[a] == '\n') && (nolinebreaks))
 215                         strcat(target, "");     /* nothing */
 216                 else if ((strbuf[a] == '\r') && (nolinebreaks))
 217                         strcat(target, "");     /* nothing */
 218                 else
 219                         strncat(target, &strbuf[a], 1);
 220         }
 221 }
 222
 223 void escputs1(char *strbuf, int nbsp, int nolinebreaks)
 224 {
 225         char *buf;
 226
 227         if (strbuf == NULL) return;
 228         buf = malloc( (3 * strlen(strbuf)) + SIZ );
 229         stresc(buf, strbuf, nbsp, nolinebreaks);
 230         wprintf("%s", buf);
 231         free(buf);
 232 }
 233
 234 void escputs(char *strbuf)
 235 {
 236         escputs1(strbuf, 0, 0);
 237 }
 238
 239 /*
 240  * Escape a string for feeding out as a URL.
 241  * Returns a pointer to a buffer that must be freed by the caller!
 242  */
 243 void urlesc(char *outbuf, char *strbuf)
 244 {
 245         int a, b, c;
 246         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 247
 248         strcpy(outbuf, "");
 249
 250         for (a = 0; a < strlen(strbuf); ++a) {
 251                 c = 0;
 252                 for (b = 0; b < strlen(ec); ++b) {
 253                         if (strbuf[a] == ec[b])
 254                                 c = 1;
 255                 }
 256                 b = strlen(outbuf);
 257                 if (c == 1)
 258                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 259                 else
 260                         sprintf(&outbuf[b], "%c", strbuf[a]);
 261         }
 262 }
 263
 264 void urlescputs(char *strbuf)
 265 {
 266         char outbuf[SIZ];
 267
 268         urlesc(outbuf, strbuf);
 269         wprintf("%s", outbuf);
 270 }
 271
 272
 273 /*
 274  * Copy a string, escaping characters for JavaScript strings.
 275  */
 276 void jsesc(char *target, char *strbuf)
 277 {
 278         int a;
 279         strcpy(target, "");
 280
 281         for (a = 0; a < strlen(strbuf); ++a) {
 282                 if (strbuf[a] == '<')
 283                         strcat(target, "[");
 284                 else if (strbuf[a] == '>')
 285                         strcat(target, "]");
 286                 else if (strbuf[a] == '\"')
 287                         strcat(target, "&quot;");
 288                 else if (strbuf[a] == '&')
 289                         strcat(target, "&amp;;");
 290                 else if (strbuf[a] == '\'')
 291                         strcat(target, "\\'");
 292                 else {
 293                         strncat(target, &strbuf[a], 1);
 294                 }
 295         }
 296 }
 297
 298 void jsescputs(char *strbuf)
 299 {
 300         char outbuf[SIZ];
 301
 302         jsesc(outbuf, strbuf);
 303         wprintf("%s", outbuf);
 304 }
 305
 306 /*
 307  * Copy a string, escaping characters for message text hold
 308  */
 309 void msgesc(char *target, char *strbuf)
 310 {
 311         int a;
 312         strcpy(target, "");
 313
 314         for (a = 0; a < strlen(strbuf); ++a) {
 315                 if (strbuf[a] == '\'')
 316                         strcat(target, "\\'");
 317                 else if (strbuf[a] == '\n')
 318                         strcat(target, " ");
 319                 else if (strbuf[a] == '\r')
 320                         strcat(target, " ");
 321                 else {
 322                         strncat(target, &strbuf[a], 1);
 323                 }
 324         }
 325 }
 326
 327 void msgescputs(char *strbuf) {
 328         char *outbuf;
 329
 330         if (strbuf == NULL) return;
 331         outbuf = malloc( (3 * strlen(strbuf)) + SIZ);
 332         msgesc(outbuf, strbuf);
 333         wprintf("%s", outbuf);
 334         free(outbuf);
 335 }
 336
 337
 338
 339
 340 /*
 341  * Output all that important stuff that the browser will want to see
 342  */
 343 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 344                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 345
 346                         int do_room_banner,     /* 0=no, 1=yes,                                     */
 347                                                 /* 2 = I'm going to embed my own, so don't open the */
 348                                                 /*     <div id="text"> either.                      */
 349
 350                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 351                         int refresh30,          /* 1 = automatically refresh page every 30 seconds  */
 352                         int suppress_check,     /* 1 = suppress check for instant messages          */
 353                         int cache               /* 1 = allow browser to cache this page             */
 354 ) {
 355         char cookie[SIZ];
 356         char httpnow[SIZ];
 357
 358         wprintf("HTTP/1.0 200 OK\n");
 359         httpdate(httpnow, time(NULL));
 360
 361         if (do_httpheaders) {
 362                 wprintf("Content-type: text/html\n"
 363                         "Server: %s / %s\n", SERVER, serv_info.serv_software
 364                 );
 365                 if (!cache)
 366                         wprintf("Connection: close\n"
 367                                 "Pragma: no-cache\n"
 368                                 "Cache-Control: no-store\n"
 369                         );
 370         }
 371
 372         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 373                         WC->wc_password, WC->wc_roomname);
 374
 375         if (unset_cookies) {
 376                 wprintf("Set-cookie: webcit=%s; path=/\n", unset);
 377         } else {
 378                 wprintf("Set-cookie: webcit=%s; path=/\n", cookie);
 379                 if (server_cookie != NULL) {
 380                         wprintf("%s\n", server_cookie);
 381                 }
 382         }
 383
 384         if (do_htmlhead) {
 385                 wprintf("\n");
 386
 387                 if (refresh30) {
 388                         svprintf("REFRESHTAG", WCS_STRING, "%s",
 389                                 "<meta http-equiv=\"refresh\" content=\"30\" />\n");
 390                 }
 391                 else {
 392                         svprintf("REFRESHTAG", WCS_STRING, "%s",
 393                                 "<meta http-equiv=\"refresh\" content=\"500363689;\" />\n");
 394                 }
 395
 396                 do_template("head");
 397         }
 398
 399         /* ICONBAR */
 400         if (do_htmlhead) {
 401
 402                 if (WC->HaveInstantMessages) {
 403                         wprintf("<div id=\"page_popup\">\n");
 404                         page_popup();
 405                         wprintf("</div>\n");
 406                 }
 407                 if ( (WC->logged_in) && (!unset_cookies) ) {
 408                         wprintf("<div id=\"iconbar\">");
 409                         do_iconbar();
 410                         wprintf("</div>\n");
 411                 }
 412                 if (do_room_banner == 1) {
 413                         wprintf("<div id=\"banner\">\n");
 414                         embed_room_banner(NULL, navbar_default);
 415                         wprintf("</div>\n");
 416                 }
 417         }
 418
 419         if (do_room_banner != 2) {
 420                 wprintf("<div id=\"content\">\n");
 421
 422
 423                 if (strlen(WC->ImportantMessage) > 0) {
 424                         do_template("beginbox_nt");
 425                         wprintf("<SPAN CLASS=\"errormsg\">"
 426                                 "%s</SPAN><br />\n", WC->ImportantMessage);
 427                         do_template("endbox");
 428                         strcpy(WC->ImportantMessage, "");
 429                 }
 430
 431         }
 432 }
 433
 434
 435 /*
 436  * Generic function to do an HTTP redirect.  Easy and fun.
 437  */
 438 void http_redirect(char *whichpage) {
 439         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 440         wprintf("Location: %s\n", whichpage);
 441         wprintf("URI: %s\n", whichpage);
 442         wprintf("Content-type: text/html\n\n");
 443         wprintf("<html><body>\n");
 444         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 445                 whichpage);
 446         wprintf("</body></html>\n");
 447 }
 448
 449
 450
 451 void check_for_instant_messages()
 452 {
 453         char buf[SIZ];
 454
 455         serv_puts("NOOP");
 456         serv_gets(buf);
 457         if (buf[3] == '*') WC->HaveInstantMessages = 1;
 458 }
 459
 460
 461
 462
 463 /*
 464  * Output a piece of content to the web browser
 465  */
 466 void http_transmit_thing(char *thing, size_t length, char *content_type,
 467                          int is_static) {
 468         if (is_static) {
 469                 output_headers(0, 0, 0, 0, 0, 0, 1);
 470         }
 471         else {
 472                 output_headers(0, 0, 0, 0, 0, 0, 0);
 473         }
 474         wprintf("Content-type: %s\n"
 475                 "Content-length: %ld\n"
 476                 "Server: %s\n"
 477                 "Connection: close\n"
 478                 "\n",
 479                 content_type,
 480                 (long) length,
 481                 SERVER
 482         );
 483         client_write(thing, (size_t)length);
 484 }
 485
 486
 487
 488
 489 void output_static(char *what)
 490 {
 491         char buf[4096];
 492         FILE *fp;
 493         struct stat statbuf;
 494         off_t bytes;
 495         char *bigbuffer;
 496         char content_type[SIZ];
 497
 498         sprintf(buf, "static/%s", what);
 499         fp = fopen(buf, "rb");
 500         if (fp == NULL) {
 501                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 502                 wprintf("Content-Type: text/plain\n");
 503                 wprintf("\n");
 504                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 505         } else {
 506                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 507                         strcpy(content_type, "image/gif");
 508                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 509                         strcpy(content_type, "text/plain");
 510                 else if (!strncasecmp(&what[strlen(what) - 4], ".css", 4))
 511                         strcpy(content_type, "text/css");
 512                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 513                         strcpy(content_type, "image/jpeg");
 514                 else if (!strncasecmp(&what[strlen(what) - 4], ".png", 4))
 515                         strcpy(content_type, "image/png");
 516                 else if (!strncasecmp(&what[strlen(what) - 4], ".ico", 4))
 517                         strcpy(content_type, "image/x-icon");
 518                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 519                         strcpy(content_type, "text/html");
 520                 else if (!strncasecmp(&what[strlen(what) - 4], ".htm", 4))
 521                         strcpy(content_type, "text/html");
 522                 else if (!strncasecmp(&what[strlen(what) - 4], ".wml", 4))
 523                         strcpy(content_type, "text/vnd.wap.wml");
 524                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmls", 5))
 525                         strcpy(content_type, "text/vnd.wap.wmlscript");
 526                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmlc", 5))
 527                         strcpy(content_type, "application/vnd.wap.wmlc");
 528                 else if (!strncasecmp(&what[strlen(what) - 6], ".wmlsc", 6))
 529                         strcpy(content_type, "application/vnd.wap.wmlscriptc");
 530                 else if (!strncasecmp(&what[strlen(what) - 5], ".wbmp", 5))
 531                         strcpy(content_type, "image/vnd.wap.wbmp");
 532                 else if (!strncasecmp(&what[strlen(what) - 3], ".js", 3))
 533                         strcpy(content_type, "text/javascript");
 534                 else
 535                         strcpy(content_type, "application/octet-stream");
 536
 537                 fstat(fileno(fp), &statbuf);
 538                 bytes = statbuf.st_size;
 539                 lprintf(3, "Static: %s, (%s; %ld bytes)\n", what, content_type, bytes);
 540                 bigbuffer = malloc(bytes + 2);
 541                 fread(bigbuffer, bytes, 1, fp);
 542                 fclose(fp);
 543
 544                 http_transmit_thing(bigbuffer, (size_t)bytes, content_type, 1);
 545                 free(bigbuffer);
 546         }
 547         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 548                 end_webcit_session();
 549         }
 550 }
 551
 552
 553 /*
 554  * When the browser requests an image file from the Citadel server,
 555  * this function is called to transmit it.
 556  */
 557 void output_image()
 558 {
 559         char buf[SIZ];
 560         char *xferbuf = NULL;
 561         off_t bytes;
 562
 563         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 564         serv_gets(buf);
 565         if (buf[0] == '2') {
 566                 bytes = extract_long(&buf[4], 0);
 567                 xferbuf = malloc(bytes + 2);
 568
 569                 /* Read it from the server */
 570                 read_server_binary(xferbuf, bytes);
 571                 serv_puts("CLOS");
 572                 serv_gets(buf);
 573
 574                 /* Write it to the browser */
 575                 http_transmit_thing(xferbuf, (size_t)bytes, "image/gif", 0);
 576                 free(xferbuf);
 577
 578         } else {
 579
 580                 /* Instead of an ugly 404, send a 1x1 transparent GIF
 581                  * when there's no such image on the server.
 582                  */
 583                 output_static("blank.gif");
 584
 585                 /*
 586                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 587                 output_headers(0, 0, 0, 0, 0, 0, 0);
 588                 wprintf("Content-Type: text/plain\n"
 589                         "\n"
 590                         "Error retrieving image: %s\n",
 591                         &buf[4]
 592                 );
 593                 */
 594
 595         }
 596
 597
 598
 599 }
 600
 601 /*
 602  */
 603 void output_mimepart()
 604 {
 605         char buf[SIZ];
 606         off_t bytes;
 607         char content_type[SIZ];
 608         char *content = NULL;
 609
 610         serv_printf("OPNA %s|%s", bstr("msgnum"), bstr("partnum"));
 611         serv_gets(buf);
 612         if (buf[0] == '2') {
 613                 bytes = extract_long(&buf[4], 0);
 614                 content = malloc(bytes + 2);
 615                 extract(content_type, &buf[4], 3);
 616                 output_headers(0, 0, 0, 0, 0, 0, 0);
 617                 read_server_binary(content, bytes);
 618                 serv_puts("CLOS");
 619                 serv_gets(buf);
 620                 http_transmit_thing(content, bytes, content_type, 0);
 621                 free(content);
 622         } else {
 623                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 624                 output_headers(0, 0, 0, 0, 0, 0, 0);
 625                 wprintf("Content-Type: text/plain\n");
 626                 wprintf("\n");
 627                 wprintf("Error retrieving part: %s\n", &buf[4]);
 628         }
 629
 630 }
 631
 632
 633 /*
 634  */
 635 char *load_mimepart(long msgnum, char *partnum)
 636 {
 637         char buf[SIZ];
 638         off_t bytes;
 639         char content_type[SIZ];
 640         char *content;
 641
 642         serv_printf("OPNA %ld|%s", msgnum, partnum);
 643         serv_gets(buf);
 644         if (buf[0] == '2') {
 645                 bytes = extract_long(&buf[4], 0);
 646                 extract(content_type, &buf[4], 3);
 647
 648                 content = malloc(bytes + 2);
 649                 read_server_binary(content, bytes);
 650
 651                 serv_puts("CLOS");
 652                 serv_gets(buf);
 653                 content[bytes] = 0;     /* null terminate for good measure */
 654                 return(content);
 655         }
 656         else {
 657                 return(NULL);
 658         }
 659
 660 }
 661
 662
 663 /*
 664  * Convenience functions to display a page containing only a string
 665  */
 666 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 667 {
 668         wprintf("HTTP/1.0 200 OK\n");
 669         output_headers(1, 1, 2, 0, 0, 0, 0);
 670         wprintf("<div id=\"banner\">\n");
 671         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#%s\"><TR><TD>", titlebarcolor);
 672         wprintf("<SPAN CLASS=\"titlebar\">%s</SPAN>\n", titlebarmsg);
 673         wprintf("</TD></TR></TABLE>\n");
 674         wprintf("</div>\n<div id=\"content\">\n");
 675         escputs(messagetext);
 676
 677         wprintf("<hr />\n");
 678         wDumpContent(1);
 679 }
 680
 681
 682 /*
 683  * Display a blank page.
 684  */
 685 void blank_page(void) {
 686         output_headers(1, 1, 0, 0, 1, 0, 0);
 687         wDumpContent(2);
 688 }
 689
 690
 691 /*
 692  * A template has been requested
 693  */
 694 void url_do_template(void) {
 695         do_template(bstr("template"));
 696 }
 697
 698
 699
 700 /*
 701  * Offer to make any page the user's "start page."
 702  */
 703 void offer_start_page(void) {
 704         wprintf("<A HREF=\"/change_start_page?startpage=");
 705         urlescputs(WC->this_page);
 706         wprintf("\">"
 707                 "<FONT SIZE=-2 COLOR=\"#AAAAAA\">Make this my start page</FONT>"
 708                 "</A>"
 709         );
 710 }
 711
 712
 713 /*
 714  * Change the user's start page
 715  */
 716 void change_start_page(void) {
 717
 718         if (bstr("startpage") == NULL) {
 719                 strcpy(WC->ImportantMessage,
 720                         "startpage set to null");
 721                 display_main_menu();
 722                 return;
 723         }
 724
 725         set_preference("startpage", bstr("startpage"));
 726
 727         output_headers(1, 1, 0, 0, 0, 0, 0);
 728         do_template("newstartpage");
 729         wDumpContent(1);
 730 }
 731
 732
 733
 734
 735 void display_success(char *successmessage)
 736 {
 737         convenience_page("007700", "OK", successmessage);
 738 }
 739
 740
 741
 742 void extract_action(char *actbuf, char *cmdbuf)
 743 {
 744         int i;
 745
 746         strcpy(actbuf, cmdbuf);
 747
 748         /*
 749          * First strip out the http method
 750          */
 751         remove_token(actbuf, 0, ' ');
 752         if (actbuf[0] == ' ') strcpy(actbuf, &actbuf[1]);
 753         if (actbuf[0] == '/') strcpy(actbuf, &actbuf[1]);
 754
 755         /*
 756          * Now kill invalid (for webcit) characters
 757          */
 758         for (i = 0; i < strlen(actbuf); ++i) {
 759                 if (actbuf[i] == ' ') {
 760                         actbuf[i] = 0;
 761                         i = 0;
 762                 }
 763                 if (actbuf[i] == '/') {
 764                         actbuf[i] = 0;
 765                         i = 0;
 766                 }
 767                 if (actbuf[i] == '?') {
 768                         actbuf[i] = 0;
 769                         i = 0;
 770                 }
 771                 if (actbuf[i] == '&') {
 772                         actbuf[i] = 0;
 773                         i = 0;
 774                 }
 775         }
 776 }
 777
 778
 779 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 780                         void *content, char *cbtype, size_t length,
 781                         char *encoding, void *userdata)
 782 {
 783         struct urlcontent *u;
 784
 785         /* Form fields */
 786         if ( (length > 0) && (strlen(cbtype) == 0) ) {
 787                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
 788                 u->next = WC->urlstrings;
 789                 WC->urlstrings = u;
 790                 safestrncpy(u->url_key, name, sizeof(u->url_key));
 791                 u->url_data = malloc(length + 1);
 792                 memcpy(u->url_data, content, length);
 793                 u->url_data[length] = 0;
 794         }
 795
 796         /* Uploaded files */
 797         if ( (length > 0) && (strlen(cbtype) > 0) ) {
 798                 WC->upload = malloc(length);
 799                 if (WC->upload != NULL) {
 800                         WC->upload_length = length;
 801                         safestrncpy(WC->upload_filename, filename,
 802                                         sizeof(WC->upload_filename));
 803                         safestrncpy(WC->upload_content_type, cbtype,
 804                                         sizeof(WC->upload_content_type));
 805                         memcpy(WC->upload, content, length);
 806                 }
 807                 else {
 808                         lprintf(3, "malloc() failed: %s\n", strerror(errno));
 809                 }
 810         }
 811
 812 }
 813
 814
 815
 816
 817 /*
 818  * Entry point for WebCit transaction
 819  */
 820 void session_loop(struct httprequest *req)
 821 {
 822         char cmd[SIZ];
 823         char method[SIZ];
 824         char action[SIZ];
 825         char buf[SIZ];
 826         int a, b;
 827         int ContentLength = 0;
 828         int BytesRead = 0;
 829         char ContentType[512];
 830         char *content = NULL;
 831         char *content_end = NULL;
 832         struct httprequest *hptr;
 833         char browser_host[SIZ];
 834         char user_agent[SIZ];
 835         int body_start;
 836
 837         /* We stuff these with the values coming from the client cookies,
 838          * so we can use them to reconnect a timed out session if we have to.
 839          */
 840         char c_username[SIZ];
 841         char c_password[SIZ];
 842         char c_roomname[SIZ];
 843         char c_httpauth_string[SIZ];
 844         char c_httpauth_user[SIZ];
 845         char c_httpauth_pass[SIZ];
 846         char cookie[SIZ];
 847
 848         strcpy(c_username, "");
 849         strcpy(c_password, "");
 850         strcpy(c_roomname, "");
 851         strcpy(c_httpauth_string, "");
 852         strcpy(c_httpauth_user, "");
 853         strcpy(c_httpauth_pass, "");
 854
 855         WC->upload_length = 0;
 856         WC->upload = NULL;
 857         WC->vars = NULL;
 858
 859         WC->is_wap = 0;
 860
 861         hptr = req;
 862         if (hptr == NULL) return;
 863
 864         strcpy(cmd, hptr->line);
 865         hptr = hptr->next;
 866         extract_token(method, cmd, 0, ' ');
 867         extract_action(action, cmd);
 868
 869         while (hptr != NULL) {
 870                 strcpy(buf, hptr->line);
 871                 hptr = hptr->next;
 872
 873                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 874                         safestrncpy(cookie, &buf[15], sizeof cookie);
 875                         cookie_to_stuff(cookie, NULL,
 876                                       c_username, c_password, c_roomname);
 877                 }
 878                 else if (!strncasecmp(buf, "Authorization: Basic ", 21)) {
 879                         CtdlDecodeBase64(c_httpauth_string, &buf[21], strlen(&buf[21]));
 880                         extract_token(c_httpauth_user, c_httpauth_string, 0, ':');
 881                         extract_token(c_httpauth_pass, c_httpauth_string, 1, ':');
 882                 }
 883                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 884                         ContentLength = atoi(&buf[16]);
 885                 }
 886                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 887                         safestrncpy(ContentType, &buf[14], sizeof ContentType);
 888                 }
 889                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 890                         safestrncpy(user_agent, &buf[12], sizeof user_agent);
 891                 }
 892                 else if (!strncasecmp(buf, "Host: ", 6)) {
 893                         safestrncpy(WC->http_host, &buf[6], sizeof WC->http_host);
 894                 }
 895                 /* Only WAP gateways explicitly name this content-type */
 896                 else if (strstr(buf, "text/vnd.wap.wml")) {
 897                         WC->is_wap = 1;
 898                 }
 899         }
 900
 901         if (ContentLength > 0) {
 902                 content = malloc(ContentLength + SIZ);
 903                 memset(content, 0, ContentLength + SIZ);
 904                 sprintf(content, "Content-type: %s\n"
 905                                 "Content-length: %d\n\n",
 906                                 ContentType, ContentLength);
 907                 body_start = strlen(content);
 908
 909                 /* Be daring and read it all at once. */
 910                 client_read(WC->http_sock, &content[BytesRead+body_start],
 911                         ContentLength);
 912
 913                 if (!strncasecmp(ContentType,
 914                               "application/x-www-form-urlencoded", 33)) {
 915                         addurls(&content[body_start]);
 916                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 917                         content_end = content + ContentLength + body_start;
 918                         mime_parser(content, content_end, *upload_handler,
 919                                         NULL, NULL, NULL, 0);
 920                 }
 921         } else {
 922                 content = NULL;
 923         }
 924
 925         /* make a note of where we are in case the user wants to save it */
 926         safestrncpy(WC->this_page, cmd, sizeof(WC->this_page));
 927         remove_token(WC->this_page, 2, ' ');
 928         remove_token(WC->this_page, 0, ' ');
 929
 930         /* If there are variables in the URL, we must grab them now */
 931         for (a = 0; a < strlen(cmd); ++a) {
 932                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 933                         for (b = a; b < strlen(cmd); ++b)
 934                                 if (isspace(cmd[b]))
 935                                         cmd[b] = 0;
 936                         addurls(&cmd[a + 1]);
 937                         cmd[a] = 0;
 938                 }
 939         }
 940
 941         /* Static content can be sent without connecting to Citadel. */
 942         if (!strcasecmp(action, "static")) {
 943                 strcpy(buf, &cmd[12]);
 944                 for (a = 0; a < strlen(buf); ++a)
 945                         if (isspace(buf[a]))
 946                                 buf[a] = 0;
 947                 output_static(buf);
 948                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
 949         }
 950
 951         /*
 952          * If we're not connected to a Citadel server, try to hook up the
 953          * connection now.
 954          */
 955         if (!WC->connected) {
 956                 if (!strcasecmp(ctdlhost, "uds")) {
 957                         /* unix domain socket */
 958                         sprintf(buf, "%s/citadel.socket", ctdlport);
 959                         WC->serv_sock = uds_connectsock(buf);
 960                 }
 961                 else {
 962                         /* tcp socket */
 963                         WC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 964                 }
 965
 966                 if (WC->serv_sock < 0) {
 967                         do_logout();
 968                         goto SKIP_ALL_THIS_CRAP;
 969                 }
 970                 else {
 971                         WC->connected = 1;
 972                         serv_gets(buf); /* get the server welcome message */
 973                         locate_host(browser_host, WC->http_sock);
 974                         get_serv_info(browser_host, user_agent);
 975                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
 976                                 wprintf("You are connected to a Citadel "
 977                                         "server running Citadel %d.%02d;\nin "
 978                                         "order to run this version of WebCit "
 979                                         "you must also have Citadel %d.%02d or"
 980                                         " newer.\n\n\n",
 981                                                 serv_info.serv_rev_level / 100,
 982                                                 serv_info.serv_rev_level % 100,
 983                                                 MINIMUM_CIT_VERSION / 100,
 984                                                 MINIMUM_CIT_VERSION % 100
 985                                         );
 986                                 end_webcit_session();
 987                                 goto SKIP_ALL_THIS_CRAP;
 988                         }
 989                 }
 990         }
 991
 992         /*
 993          * Functions which can be performed without logging in
 994          */
 995         if (!strcasecmp(action, "listsub")) {
 996                 do_listsub();
 997                 goto SKIP_ALL_THIS_CRAP;
 998         }
 999 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1000         if (!strcasecmp(action, "freebusy")) {
1001                 do_freebusy(cmd);
1002                 goto SKIP_ALL_THIS_CRAP;
1003         }
1004 #endif
1005
1006         /*
1007          * If we're not logged in, but we have HTTP Authentication data,
1008          * try logging in to Citadel using that.
1009          */
1010         if ((!WC->logged_in)
1011            && (strlen(c_httpauth_user) > 0)
1012            && (strlen(c_httpauth_pass) > 0)) {
1013                 serv_printf("USER %s", c_httpauth_user);
1014                 serv_gets(buf);
1015                 if (buf[0] == '3') {
1016                         serv_printf("PASS %s", c_httpauth_pass);
1017                         serv_gets(buf);
1018                         if (buf[0] == '2') {
1019                                 become_logged_in(c_httpauth_user,
1020                                                 c_httpauth_pass, buf);
1021                                 strcpy(WC->httpauth_user, c_httpauth_user);
1022                                 strcpy(WC->httpauth_pass, c_httpauth_pass);
1023                         }
1024                 }
1025         }
1026
1027         /*
1028          * The GroupDAV stuff relies on HTTP authentication instead of
1029          * our session's authentication.
1030          */
1031         if (!strncasecmp(action, "groupdav", 8)) {
1032                 groupdav_main(req, ContentType, /* do GroupDAV methods */
1033                         ContentLength, content+body_start);
1034                 if (!WC->logged_in) {
1035                         WC->killthis = 1;       /* If not logged in, don't */
1036                 }                               /* keep the session active */
1037                 goto SKIP_ALL_THIS_CRAP;
1038         }
1039
1040         check_for_instant_messages();
1041
1042         /*
1043          * If we're not logged in, but we have username and password cookies
1044          * supplied by the browser, try using them to log in.
1045          */
1046         if ((!WC->logged_in)
1047            && (strlen(c_username) > 0)
1048            && (strlen(c_password) > 0)) {
1049                 serv_printf("USER %s", c_username);
1050                 serv_gets(buf);
1051                 if (buf[0] == '3') {
1052                         serv_printf("PASS %s", c_password);
1053                         serv_gets(buf);
1054                         if (buf[0] == '2') {
1055                                 become_logged_in(c_username, c_password, buf);
1056                         }
1057                 }
1058         }
1059         /*
1060          * If we don't have a current room, but a cookie specifying the
1061          * current room is supplied, make an effort to go there.
1062          */
1063         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
1064                 serv_printf("GOTO %s", c_roomname);
1065                 serv_gets(buf);
1066                 if (buf[0] == '2') {
1067                         strcpy(WC->wc_roomname, c_roomname);
1068                 }
1069         }
1070
1071         if (!strcasecmp(action, "image")) {
1072                 output_image();
1073
1074         /*
1075          * All functions handled below this point ... make sure we log in
1076          * before doing anything else!
1077          */
1078         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
1079                 do_login();
1080         } else if (!WC->logged_in) {
1081                 display_login(NULL);
1082         }
1083
1084         /*
1085          * Various commands...
1086          */
1087
1088         else if (!strcasecmp(action, "do_welcome")) {
1089                 do_welcome();
1090         } else if (!strcasecmp(action, "blank")) {
1091                 blank_page();
1092         } else if (!strcasecmp(action, "do_template")) {
1093                 url_do_template();
1094         } else if (!strcasecmp(action, "display_main_menu")) {
1095                 display_main_menu();
1096         } else if (!strcasecmp(action, "whobbs")) {
1097                 whobbs();
1098         } else if (!strcasecmp(action, "knrooms")) {
1099                 knrooms();
1100         } else if (!strcasecmp(action, "gotonext")) {
1101                 slrp_highest();
1102                 gotonext();
1103         } else if (!strcasecmp(action, "skip")) {
1104                 gotonext();
1105         } else if (!strcasecmp(action, "ungoto")) {
1106                 ungoto();
1107         } else if (!strcasecmp(action, "dotgoto")) {
1108                 slrp_highest();
1109                 smart_goto(bstr("room"));
1110         } else if (!strcasecmp(action, "dotskip")) {
1111                 smart_goto(bstr("room"));
1112         } else if (!strcasecmp(action, "termquit")) {
1113                 do_logout();
1114         } else if (!strcasecmp(action, "readnew")) {
1115                 readloop("readnew");
1116         } else if (!strcasecmp(action, "readold")) {
1117                 readloop("readold");
1118         } else if (!strcasecmp(action, "readfwd")) {
1119                 readloop("readfwd");
1120         } else if (!strcasecmp(action, "headers")) {
1121                 readloop("headers");
1122         } else if (!strcasecmp(action, "display_enter")) {
1123                 display_enter();
1124         } else if (!strcasecmp(action, "post")) {
1125                 post_message();
1126         } else if (!strcasecmp(action, "do_stuff_to_one_msg")) {
1127                 do_stuff_to_one_msg();
1128         } else if (!strcasecmp(action, "move_msg")) {
1129                 move_msg();
1130         } else if (!strcasecmp(action, "userlist")) {
1131                 userlist();
1132         } else if (!strcasecmp(action, "showuser")) {
1133                 showuser();
1134         } else if (!strcasecmp(action, "display_page")) {
1135                 display_page();
1136         } else if (!strcasecmp(action, "page_user")) {
1137                 page_user();
1138         } else if (!strcasecmp(action, "chat")) {
1139                 do_chat();
1140         } else if (!strcasecmp(action, "display_private")) {
1141                 display_private("", 0);
1142         } else if (!strcasecmp(action, "goto_private")) {
1143                 goto_private();
1144         } else if (!strcasecmp(action, "zapped_list")) {
1145                 zapped_list();
1146         } else if (!strcasecmp(action, "display_zap")) {
1147                 display_zap();
1148         } else if (!strcasecmp(action, "zap")) {
1149                 zap();
1150         } else if (!strcasecmp(action, "display_entroom")) {
1151                 display_entroom();
1152         } else if (!strcasecmp(action, "entroom")) {
1153                 entroom();
1154         } else if (!strcasecmp(action, "display_editroom")) {
1155                 display_editroom();
1156         } else if (!strcasecmp(action, "netedit")) {
1157                 netedit();
1158         } else if (!strcasecmp(action, "editroom")) {
1159                 editroom();
1160         } else if (!strcasecmp(action, "display_whok")) {
1161                 display_whok();
1162         } else if (!strcasecmp(action, "display_editinfo")) {
1163                 display_edit("Room info", "EINF 0", "RINF", "/editinfo", 1);
1164         } else if (!strcasecmp(action, "editinfo")) {
1165                 save_edit("Room info", "EINF 1", 1);
1166         } else if (!strcasecmp(action, "display_editbio")) {
1167                 sprintf(buf, "RBIO %s", WC->wc_username);
1168                 display_edit("Your bio", "NOOP", buf, "editbio", 3);
1169         } else if (!strcasecmp(action, "editbio")) {
1170                 save_edit("Your bio", "EBIO", 0);
1171         } else if (!strcasecmp(action, "confirm_delete_room")) {
1172                 confirm_delete_room();
1173         } else if (!strcasecmp(action, "delete_room")) {
1174                 delete_room();
1175         } else if (!strcasecmp(action, "validate")) {
1176                 validate();
1177         } else if (!strcasecmp(action, "display_editpic")) {
1178                 display_graphics_upload("your photo",
1179                                         "UIMG 0|_userpic_",
1180                                         "/editpic");
1181         } else if (!strcasecmp(action, "editpic")) {
1182                 do_graphics_upload("UIMG 1|_userpic_");
1183         } else if (!strcasecmp(action, "display_editroompic")) {
1184                 display_graphics_upload("the graphic for this room",
1185                                         "UIMG 0|_roompic_",
1186                                         "/editroompic");
1187         } else if (!strcasecmp(action, "editroompic")) {
1188                 do_graphics_upload("UIMG 1|_roompic_");
1189         } else if (!strcasecmp(action, "delete_floor")) {
1190                 delete_floor();
1191         } else if (!strcasecmp(action, "rename_floor")) {
1192                 rename_floor();
1193         } else if (!strcasecmp(action, "create_floor")) {
1194                 create_floor();
1195         } else if (!strcasecmp(action, "display_editfloorpic")) {
1196                 sprintf(buf, "UIMG 0|_floorpic_|%s",
1197                         bstr("which_floor"));
1198                 display_graphics_upload("the graphic for this floor",
1199                                         buf,
1200                                         "/editfloorpic");
1201         } else if (!strcasecmp(action, "editfloorpic")) {
1202                 sprintf(buf, "UIMG 1|_floorpic_|%s",
1203                         bstr("which_floor"));
1204                 do_graphics_upload(buf);
1205         } else if (!strcasecmp(action, "display_reg")) {
1206                 display_reg(0);
1207         } else if (!strcasecmp(action, "display_changepw")) {
1208                 display_changepw();
1209         } else if (!strcasecmp(action, "changepw")) {
1210                 changepw();
1211         } else if (!strcasecmp(action, "display_edit_node")) {
1212                 display_edit_node();
1213         } else if (!strcasecmp(action, "edit_node")) {
1214                 edit_node();
1215         } else if (!strcasecmp(action, "display_netconf")) {
1216                 display_netconf();
1217         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
1218                 display_confirm_delete_node();
1219         } else if (!strcasecmp(action, "delete_node")) {
1220                 delete_node();
1221         } else if (!strcasecmp(action, "display_add_node")) {
1222                 display_add_node();
1223         } else if (!strcasecmp(action, "add_node")) {
1224                 add_node();
1225         } else if (!strcasecmp(action, "terminate_session")) {
1226                 slrp_highest();
1227                 terminate_session();
1228         } else if (!strcasecmp(action, "edit_me")) {
1229                 edit_me();
1230         } else if (!strcasecmp(action, "display_siteconfig")) {
1231                 display_siteconfig();
1232         } else if (!strcasecmp(action, "chat_recv")) {
1233                 chat_recv();
1234         } else if (!strcasecmp(action, "chat_send")) {
1235                 chat_send();
1236         } else if (!strcasecmp(action, "siteconfig")) {
1237                 siteconfig();
1238         } else if (!strcasecmp(action, "display_generic")) {
1239                 display_generic();
1240         } else if (!strcasecmp(action, "do_generic")) {
1241                 do_generic();
1242         } else if (!strcasecmp(action, "display_menubar")) {
1243                 display_menubar(1);
1244         } else if (!strcasecmp(action, "output_mimepart")) {
1245                 output_mimepart();
1246         } else if (!strcasecmp(action, "edit_vcard")) {
1247                 edit_vcard();
1248         } else if (!strcasecmp(action, "submit_vcard")) {
1249                 submit_vcard();
1250         } else if (!strcasecmp(action, "select_user_to_edit")) {
1251                 select_user_to_edit(NULL, NULL);
1252         } else if (!strcasecmp(action, "display_edituser")) {
1253                 display_edituser(NULL, 0);
1254         } else if (!strcasecmp(action, "edituser")) {
1255                 edituser();
1256         } else if (!strcasecmp(action, "create_user")) {
1257                 create_user();
1258         } else if (!strcasecmp(action, "changeview")) {
1259                 change_view();
1260         } else if (!strcasecmp(action, "do_stuff_to_msgs")) {
1261                 do_stuff_to_msgs();
1262         } else if (!strcasecmp(action, "change_start_page")) {
1263                 change_start_page();
1264         } else if (!strcasecmp(action, "display_floorconfig")) {
1265                 display_floorconfig(NULL);
1266         } else if (!strcasecmp(action, "toggle_self_service")) {
1267                 toggle_self_service();
1268 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1269         } else if (!strcasecmp(action, "display_edit_task")) {
1270                 display_edit_task();
1271         } else if (!strcasecmp(action, "save_task")) {
1272                 save_task();
1273         } else if (!strcasecmp(action, "display_edit_event")) {
1274                 display_edit_event();
1275         } else if (!strcasecmp(action, "save_event")) {
1276                 save_event();
1277         } else if (!strcasecmp(action, "respond_to_request")) {
1278                 respond_to_request();
1279         } else if (!strcasecmp(action, "handle_rsvp")) {
1280                 handle_rsvp();
1281 #endif
1282         } else if (!strcasecmp(action, "summary")) {
1283                 summary();
1284         } else if (!strcasecmp(action, "iconbar")) {
1285                 do_iconbar();
1286         } else if (!strcasecmp(action, "display_customize_iconbar")) {
1287                 display_customize_iconbar();
1288         } else if (!strcasecmp(action, "commit_iconbar")) {
1289                 commit_iconbar();
1290         } else if (!strcasecmp(action, "set_room_policy")) {
1291                 set_room_policy();
1292         } else if (!strcasecmp(action, "display_inetconf")) {
1293                 display_inetconf();
1294         } else if (!strcasecmp(action, "save_inetconf")) {
1295                 save_inetconf();
1296         } else if (!strcasecmp(action, "diagnostics")) {
1297                 output_headers(1, 1, 1, 0, 0, 0, 0);
1298
1299                 wprintf("You're in session %d<hr />\n", WC->wc_session);
1300                 wprintf("Command: <br /><PRE>\n");
1301                 escputs(cmd);
1302                 wprintf("</PRE><hr />\n");
1303                 wprintf("Variables: <br /><PRE>\n");
1304                 dump_vars();
1305                 wprintf("</PRE><hr />\n");
1306                 wDumpContent(1);
1307         }
1308         /* When all else fais, display the main menu. */
1309         else {
1310                 display_main_menu();
1311         }
1312
1313 SKIP_ALL_THIS_CRAP:
1314         fflush(stdout);
1315         if (content != NULL) {
1316                 free(content);
1317                 content = NULL;
1318         }
1319         free_urls();
1320         if (WC->upload_length > 0) {
1321                 free(WC->upload);
1322                 WC->upload_length = 0;
1323         }
1324
1325 }