webcit/webcit.c

   1 /*
   2  * webcit.c
   3  *
   4  * This is the actual program called by the webserver.  It maintains a
   5  * persistent session to the Citadel server, handling HTTP WebCit requests as
   6  * they arrive and presenting a user interface.
   7  *
   8  * $Id$
   9  */
  10
  11 #include <ctype.h>
  12 #include <stdlib.h>
  13 #include <unistd.h>
  14 #include <stdio.h>
  15 #include <fcntl.h>
  16 #include <signal.h>
  17 #include <sys/types.h>
  18 #include <sys/wait.h>
  19 #include <sys/socket.h>
  20 #include <sys/time.h>
  21 #include <sys/stat.h>
  22 #include <limits.h>
  23 #include <netinet/in.h>
  24 #include <netdb.h>
  25 #include <string.h>
  26 #include <pwd.h>
  27 #include <errno.h>
  28 #include <stdarg.h>
  29 #include <pthread.h>
  30 #include <signal.h>
  31 #include "webcit.h"
  32 #include "webserver.h"
  33 #include "mime_parser.h"
  34
  35 /*
  36  * String to unset the cookie.
  37  * Any date "in the past" will work, so I chose my birthday, right down to
  38  * the exact minute.  :)
  39  */
  40 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  41
  42 void unescape_input(char *buf)
  43 {
  44         int a, b;
  45         char hex[3];
  46
  47         while ((isspace(buf[strlen(buf) - 1])) && (strlen(buf) > 0))
  48                 buf[strlen(buf) - 1] = 0;
  49
  50         for (a = 0; a < strlen(buf); ++a) {
  51                 if (buf[a] == '+')
  52                         buf[a] = ' ';
  53                 if (buf[a] == '%') {
  54                         hex[0] = buf[a + 1];
  55                         hex[1] = buf[a + 2];
  56                         hex[2] = 0;
  57                         sscanf(hex, "%02x", &b);
  58                         buf[a] = (char) b;
  59                         strcpy(&buf[a + 1], &buf[a + 3]);
  60                 }
  61         }
  62
  63 }
  64
  65
  66 void addurls(char *url)
  67 {
  68         char *up, *ptr;
  69         char buf[SIZ];
  70         int a, b;
  71         struct urlcontent *u;
  72
  73         up = url;
  74         while (strlen(up) > 0) {
  75
  76                 /* locate the = sign */
  77                 safestrncpy(buf, up, sizeof buf);
  78                 b = (-1);
  79                 for (a = 255; a >= 0; --a)
  80                         if (buf[a] == '=')
  81                                 b = a;
  82                 if (b < 0)
  83                         return;
  84                 buf[b] = 0;
  85
  86                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
  87                 u->next = WC->urlstrings;
  88                 WC->urlstrings = u;
  89                 strcpy(u->url_key, buf);
  90
  91                 /* now chop that part off */
  92                 for (a = 0; a <= b; ++a)
  93                         ++up;
  94
  95                 /* locate "&" and "?" delimiters */
  96                 ptr = up;
  97                 b = strlen(up);
  98                 for (a = 0; a < strlen(up); ++a) {
  99                         if ( (ptr[0] == '&') || (ptr[0] == '?') ) {
 100                                 b = a;
 101                                 break;
 102                         }
 103                         ++ptr;
 104                 }
 105                 ptr = up;
 106                 for (a = 0; a < b; ++a)
 107                         ++ptr;
 108                 strcpy(ptr, "");
 109
 110                 u->url_data = malloc(strlen(up) + 2);
 111                 strcpy(u->url_data, up);
 112                 u->url_data[b] = 0;
 113                 unescape_input(u->url_data);
 114                 up = ptr;
 115                 ++up;
 116         }
 117 }
 118
 119 void free_urls(void)
 120 {
 121         struct urlcontent *u;
 122
 123         while (WC->urlstrings != NULL) {
 124                 free(WC->urlstrings->url_data);
 125                 u = WC->urlstrings->next;
 126                 free(WC->urlstrings);
 127                 WC->urlstrings = u;
 128         }
 129 }
 130
 131 /*
 132  * Diagnostic function to display the contents of all variables
 133  */
 134 void dump_vars(void)
 135 {
 136         struct urlcontent *u;
 137
 138         for (u = WC->urlstrings; u != NULL; u = u->next) {
 139                 wprintf("%38s = %s\n", u->url_key, u->url_data);
 140         }
 141 }
 142
 143 char *bstr(char *key)
 144 {
 145         struct urlcontent *u;
 146
 147         for (u = WC->urlstrings; u != NULL; u = u->next) {
 148                 if (!strcasecmp(u->url_key, key))
 149                         return (u->url_data);
 150         }
 151         return ("");
 152 }
 153
 154
 155 void wprintf(const char *format,...)
 156 {
 157         va_list arg_ptr;
 158         char wbuf[4096];
 159
 160         va_start(arg_ptr, format);
 161         vsnprintf(wbuf, sizeof wbuf, format, arg_ptr);
 162         va_end(arg_ptr);
 163
 164         client_write(wbuf, strlen(wbuf));
 165 }
 166
 167
 168 /*
 169  * wDumpContent() wraps up an HTTP session, closes tags, etc.
 170  *
 171  * print_standard_html_footer should be set to 0 to transmit only, 1 to
 172  * append the main menu and closing tags, or 2 to
 173  * append the closing tags only.
 174  */
 175 void wDumpContent(int print_standard_html_footer)
 176 {
 177         if (print_standard_html_footer) {
 178                 wprintf("</DIV>\n");    /* end of "text" div */
 179                 do_template("trailing");
 180         }
 181
 182 }
 183
 184
 185 /*
 186  * Copy a string, escaping characters which have meaning in HTML.  If
 187  * nbsp is nonzero, spaces are converted to non-breaking spaces.
 188  */
 189 void stresc(char *target, char *strbuf, int nbsp, int nolinebreaks)
 190 {
 191         int a;
 192         strcpy(target, "");
 193
 194         for (a = 0; a < strlen(strbuf); ++a) {
 195                 if (strbuf[a] == '<')
 196                         strcat(target, "&lt;");
 197                 else if (strbuf[a] == '>')
 198                         strcat(target, "&gt;");
 199                 else if (strbuf[a] == '&')
 200                         strcat(target, "&amp;");
 201                 else if (strbuf[a] == '\"')
 202                         strcat(target, "&quot;");
 203                 else if (strbuf[a] == '\'')
 204                         strcat(target, "&#39;");
 205                 else if (strbuf[a] == LB)
 206                         strcat(target, "<");
 207                 else if (strbuf[a] == RB)
 208                         strcat(target, ">");
 209                 else if (strbuf[a] == QU)
 210                         strcat(target, "\"");
 211                 else if ((strbuf[a] == 32) && (nbsp == 1))
 212                         strcat(target, "&nbsp;");
 213                 else if ((strbuf[a] == '\n') && (nolinebreaks))
 214                         strcat(target, "");     /* nothing */
 215                 else if ((strbuf[a] == '\r') && (nolinebreaks))
 216                         strcat(target, "");     /* nothing */
 217                 else
 218                         strncat(target, &strbuf[a], 1);
 219         }
 220 }
 221
 222 void escputs1(char *strbuf, int nbsp, int nolinebreaks)
 223 {
 224         char *buf;
 225
 226         if (strbuf == NULL) return;
 227         buf = malloc( (3 * strlen(strbuf)) + SIZ );
 228         stresc(buf, strbuf, nbsp, nolinebreaks);
 229         wprintf("%s", buf);
 230         free(buf);
 231 }
 232
 233 void escputs(char *strbuf)
 234 {
 235         escputs1(strbuf, 0, 0);
 236 }
 237
 238 /*
 239  * Escape a string for feeding out as a URL.
 240  * Returns a pointer to a buffer that must be freed by the caller!
 241  */
 242 void urlesc(char *outbuf, char *strbuf)
 243 {
 244         int a, b, c;
 245         char *ec = " #&;`'|*?-~<>^()[]{}$\\";
 246
 247         strcpy(outbuf, "");
 248
 249         for (a = 0; a < strlen(strbuf); ++a) {
 250                 c = 0;
 251                 for (b = 0; b < strlen(ec); ++b) {
 252                         if (strbuf[a] == ec[b])
 253                                 c = 1;
 254                 }
 255                 b = strlen(outbuf);
 256                 if (c == 1)
 257                         sprintf(&outbuf[b], "%%%02x", strbuf[a]);
 258                 else
 259                         sprintf(&outbuf[b], "%c", strbuf[a]);
 260         }
 261 }
 262
 263 void urlescputs(char *strbuf)
 264 {
 265         char outbuf[SIZ];
 266
 267         urlesc(outbuf, strbuf);
 268         wprintf("%s", outbuf);
 269 }
 270
 271
 272 /*
 273  * Copy a string, escaping characters for JavaScript strings.
 274  */
 275 void jsesc(char *target, char *strbuf)
 276 {
 277         int a;
 278         strcpy(target, "");
 279
 280         for (a = 0; a < strlen(strbuf); ++a) {
 281                 if (strbuf[a] == '<')
 282                         strcat(target, "[");
 283                 else if (strbuf[a] == '>')
 284                         strcat(target, "]");
 285                 else if (strbuf[a] == '\"')
 286                         strcat(target, "&quot;");
 287                 else if (strbuf[a] == '&')
 288                         strcat(target, "&amp;;");
 289                 else if (strbuf[a] == '\'')
 290                         strcat(target, "\\'");
 291                 else {
 292                         strncat(target, &strbuf[a], 1);
 293                 }
 294         }
 295 }
 296
 297 void jsescputs(char *strbuf)
 298 {
 299         char outbuf[SIZ];
 300
 301         jsesc(outbuf, strbuf);
 302         wprintf("%s", outbuf);
 303 }
 304
 305 /*
 306  * Copy a string, escaping characters for message text hold
 307  */
 308 void msgesc(char *target, char *strbuf)
 309 {
 310         int a;
 311         strcpy(target, "");
 312
 313         for (a = 0; a < strlen(strbuf); ++a) {
 314                 if (strbuf[a] == '\'')
 315                         strcat(target, "\\'");
 316                 else if (strbuf[a] == '\n')
 317                         strcat(target, " ");
 318                 else if (strbuf[a] == '\r')
 319                         strcat(target, " ");
 320                 else {
 321                         strncat(target, &strbuf[a], 1);
 322                 }
 323         }
 324 }
 325
 326 void msgescputs(char *strbuf) {
 327         char *outbuf;
 328
 329         if (strbuf == NULL) return;
 330         outbuf = malloc( (3 * strlen(strbuf)) + SIZ);
 331         msgesc(outbuf, strbuf);
 332         wprintf("%s", outbuf);
 333         free(outbuf);
 334 }
 335
 336
 337
 338
 339 /*
 340  * Output all that important stuff that the browser will want to see
 341  */
 342 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 343                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 344
 345                         int do_room_banner,     /* 0=no, 1=yes,                                     */
 346                                                 /* 2 = I'm going to embed my own, so don't open the */
 347                                                 /*     <div id="text"> either.                      */
 348
 349                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 350                         int refresh30,          /* 1 = automatically refresh page every 30 seconds  */
 351                         int suppress_check,     /* 1 = suppress check for instant messages          */
 352                         int cache               /* 1 = allow browser to cache this page             */
 353 ) {
 354         char cookie[SIZ];
 355         char httpnow[SIZ];
 356
 357         wprintf("HTTP/1.0 200 OK\n");
 358         httpdate(httpnow, time(NULL));
 359
 360         if (do_httpheaders) {
 361                 wprintf("Content-type: text/html\n"
 362                         "Server: %s\n", SERVER
 363                 );
 364                 if (!cache)
 365                         wprintf("Connection: close\n"
 366                                 "Pragma: no-cache\n"
 367                                 "Cache-Control: no-store\n"
 368                         );
 369         }
 370
 371         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 372                         WC->wc_password, WC->wc_roomname);
 373
 374         if (unset_cookies) {
 375                 wprintf("Set-cookie: webcit=%s; path=/\n", unset);
 376         } else {
 377                 wprintf("Set-cookie: webcit=%s; path=/\n", cookie);
 378                 if (server_cookie != NULL) {
 379                         wprintf("%s\n", server_cookie);
 380                 }
 381         }
 382
 383         if (do_htmlhead) {
 384                 wprintf("\n");
 385
 386                 if (refresh30) {
 387                         svprintf("REFRESHTAG", WCS_STRING, "%s",
 388                                 "<meta http-equiv=\"refresh\" content=\"30\" />\n");
 389                 }
 390                 else {
 391                         svprintf("REFRESHTAG", WCS_STRING, "%s",
 392                                 "<meta http-equiv=\"refresh\" content=\"500363689;\" />\n");
 393                 }
 394
 395                 do_template("head");
 396         }
 397
 398         /* ICONBAR */
 399         if (do_htmlhead) {
 400
 401                 if (WC->HaveInstantMessages) {
 402                         wprintf("<div id=\"page_popup\">\n");
 403                         page_popup();
 404                         wprintf("</div>\n");
 405                 }
 406                 if ( (WC->logged_in) && (!unset_cookies) ) {
 407                         wprintf("<div id=\"iconbar\">");
 408                         do_iconbar();
 409                         wprintf("</div>\n");
 410                 }
 411                 if (do_room_banner == 1) {
 412                         wprintf("<div id=\"banner\">\n");
 413                         embed_room_banner(NULL, navbar_default);
 414                         wprintf("</div>\n");
 415                 }
 416         }
 417
 418         if (do_room_banner != 2) {
 419                 wprintf("<div id=\"content\">\n");
 420
 421
 422                 if (strlen(WC->ImportantMessage) > 0) {
 423                         do_template("beginbox_nt");
 424                         wprintf("<SPAN CLASS=\"errormsg\">"
 425                                 "%s</SPAN><br />\n", WC->ImportantMessage);
 426                         do_template("endbox");
 427                         strcpy(WC->ImportantMessage, "");
 428                 }
 429
 430         }
 431 }
 432
 433
 434 /*
 435  * Generic function to do an HTTP redirect.  Easy and fun.
 436  */
 437 void http_redirect(char *whichpage) {
 438         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 439         wprintf("Location: %s\n", whichpage);
 440         wprintf("URI: %s\n", whichpage);
 441         wprintf("Content-type: text/html\n\n");
 442         wprintf("<html><body>\n");
 443         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 444                 whichpage);
 445         wprintf("</body></html>\n");
 446 }
 447
 448
 449
 450 void check_for_instant_messages()
 451 {
 452         char buf[SIZ];
 453
 454         serv_puts("NOOP");
 455         serv_gets(buf);
 456         if (buf[3] == '*') WC->HaveInstantMessages = 1;
 457 }
 458
 459
 460
 461
 462 /*
 463  * Output a piece of content to the web browser
 464  */
 465 void http_transmit_thing(char *thing, size_t length, char *content_type,
 466                          int is_static) {
 467         if (is_static) {
 468                 output_headers(0, 0, 0, 0, 0, 0, 1);
 469         }
 470         else {
 471                 output_headers(0, 0, 0, 0, 0, 0, 0);
 472         }
 473         wprintf("Content-type: %s\n"
 474                 "Content-length: %ld\n"
 475                 "Server: %s\n"
 476                 "Connection: close\n"
 477                 "\n",
 478                 content_type,
 479                 (long) length,
 480                 SERVER
 481         );
 482         client_write(thing, (size_t)length);
 483 }
 484
 485
 486
 487
 488 void output_static(char *what)
 489 {
 490         char buf[4096];
 491         FILE *fp;
 492         struct stat statbuf;
 493         off_t bytes;
 494         char *bigbuffer;
 495         char content_type[SIZ];
 496
 497         sprintf(buf, "static/%s", what);
 498         fp = fopen(buf, "rb");
 499         if (fp == NULL) {
 500                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 501                 wprintf("Content-Type: text/plain\n");
 502                 wprintf("\n");
 503                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 504         } else {
 505                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 506                         strcpy(content_type, "image/gif");
 507                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 508                         strcpy(content_type, "text/plain");
 509                 else if (!strncasecmp(&what[strlen(what) - 4], ".css", 4))
 510                         strcpy(content_type, "text/css");
 511                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 512                         strcpy(content_type, "image/jpeg");
 513                 else if (!strncasecmp(&what[strlen(what) - 4], ".png", 4))
 514                         strcpy(content_type, "image/png");
 515                 else if (!strncasecmp(&what[strlen(what) - 4], ".ico", 4))
 516                         strcpy(content_type, "image/x-icon");
 517                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 518                         strcpy(content_type, "text/html");
 519                 else if (!strncasecmp(&what[strlen(what) - 4], ".htm", 4))
 520                         strcpy(content_type, "text/html");
 521                 else if (!strncasecmp(&what[strlen(what) - 4], ".wml", 4))
 522                         strcpy(content_type, "text/vnd.wap.wml");
 523                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmls", 5))
 524                         strcpy(content_type, "text/vnd.wap.wmlscript");
 525                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmlc", 5))
 526                         strcpy(content_type, "application/vnd.wap.wmlc");
 527                 else if (!strncasecmp(&what[strlen(what) - 6], ".wmlsc", 6))
 528                         strcpy(content_type, "application/vnd.wap.wmlscriptc");
 529                 else if (!strncasecmp(&what[strlen(what) - 5], ".wbmp", 5))
 530                         strcpy(content_type, "image/vnd.wap.wbmp");
 531                 else if (!strncasecmp(&what[strlen(what) - 3], ".js", 3))
 532                         strcpy(content_type, "text/javascript");
 533                 else
 534                         strcpy(content_type, "application/octet-stream");
 535
 536                 fstat(fileno(fp), &statbuf);
 537                 bytes = statbuf.st_size;
 538                 lprintf(3, "Static: %s, (%s; %ld bytes)\n", what, content_type, bytes);
 539                 bigbuffer = malloc(bytes + 2);
 540                 fread(bigbuffer, bytes, 1, fp);
 541                 fclose(fp);
 542
 543                 http_transmit_thing(bigbuffer, (size_t)bytes, content_type, 1);
 544                 free(bigbuffer);
 545         }
 546         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 547                 end_webcit_session();
 548         }
 549 }
 550
 551
 552 /*
 553  * When the browser requests an image file from the Citadel server,
 554  * this function is called to transmit it.
 555  */
 556 void output_image()
 557 {
 558         char buf[SIZ];
 559         char *xferbuf = NULL;
 560         off_t bytes;
 561
 562         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 563         serv_gets(buf);
 564         if (buf[0] == '2') {
 565                 bytes = extract_long(&buf[4], 0);
 566                 xferbuf = malloc(bytes + 2);
 567
 568                 /* Read it from the server */
 569                 read_server_binary(xferbuf, bytes);
 570                 serv_puts("CLOS");
 571                 serv_gets(buf);
 572
 573                 /* Write it to the browser */
 574                 http_transmit_thing(xferbuf, (size_t)bytes, "image/gif", 0);
 575                 free(xferbuf);
 576
 577         } else {
 578
 579                 /* Instead of an ugly 404, send a 1x1 transparent GIF
 580                  * when there's no such image on the server.
 581                  */
 582                 output_static("blank.gif");
 583
 584                 /*
 585                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 586                 output_headers(0, 0, 0, 0, 0, 0, 0);
 587                 wprintf("Content-Type: text/plain\n"
 588                         "\n"
 589                         "Error retrieving image: %s\n",
 590                         &buf[4]
 591                 );
 592                 */
 593
 594         }
 595
 596
 597
 598 }
 599
 600 /*
 601  */
 602 void output_mimepart()
 603 {
 604         char buf[SIZ];
 605         off_t bytes;
 606         char content_type[SIZ];
 607         char *content = NULL;
 608
 609         serv_printf("OPNA %s|%s", bstr("msgnum"), bstr("partnum"));
 610         serv_gets(buf);
 611         if (buf[0] == '2') {
 612                 bytes = extract_long(&buf[4], 0);
 613                 content = malloc(bytes + 2);
 614                 extract(content_type, &buf[4], 3);
 615                 output_headers(0, 0, 0, 0, 0, 0, 0);
 616                 read_server_binary(content, bytes);
 617                 serv_puts("CLOS");
 618                 serv_gets(buf);
 619                 http_transmit_thing(content, bytes, content_type, 0);
 620                 free(content);
 621         } else {
 622                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 623                 output_headers(0, 0, 0, 0, 0, 0, 0);
 624                 wprintf("Content-Type: text/plain\n");
 625                 wprintf("\n");
 626                 wprintf("Error retrieving part: %s\n", &buf[4]);
 627         }
 628
 629 }
 630
 631
 632 /*
 633  */
 634 char *load_mimepart(long msgnum, char *partnum)
 635 {
 636         char buf[SIZ];
 637         off_t bytes;
 638         char content_type[SIZ];
 639         char *content;
 640
 641         serv_printf("OPNA %ld|%s", msgnum, partnum);
 642         serv_gets(buf);
 643         if (buf[0] == '2') {
 644                 bytes = extract_long(&buf[4], 0);
 645                 extract(content_type, &buf[4], 3);
 646
 647                 content = malloc(bytes + 2);
 648                 read_server_binary(content, bytes);
 649
 650                 serv_puts("CLOS");
 651                 serv_gets(buf);
 652                 content[bytes] = 0;     /* null terminate for good measure */
 653                 return(content);
 654         }
 655         else {
 656                 return(NULL);
 657         }
 658
 659 }
 660
 661
 662 /*
 663  * Convenience functions to display a page containing only a string
 664  */
 665 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 666 {
 667         wprintf("HTTP/1.0 200 OK\n");
 668         output_headers(1, 1, 2, 0, 0, 0, 0);
 669         wprintf("<div id=\"banner\">\n");
 670         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#%s\"><TR><TD>", titlebarcolor);
 671         wprintf("<SPAN CLASS=\"titlebar\">%s</SPAN>\n", titlebarmsg);
 672         wprintf("</TD></TR></TABLE>\n");
 673         wprintf("</div>\n<div id=\"content\">\n");
 674         escputs(messagetext);
 675
 676         wprintf("<hr />\n");
 677         wDumpContent(1);
 678 }
 679
 680
 681 /*
 682  * Display a blank page.
 683  */
 684 void blank_page(void) {
 685         output_headers(1, 1, 0, 0, 1, 0, 0);
 686         wDumpContent(2);
 687 }
 688
 689
 690 /*
 691  * A template has been requested
 692  */
 693 void url_do_template(void) {
 694         do_template(bstr("template"));
 695 }
 696
 697
 698
 699 /*
 700  * Offer to make any page the user's "start page."
 701  */
 702 void offer_start_page(void) {
 703         wprintf("<A HREF=\"/change_start_page?startpage=");
 704         urlescputs(WC->this_page);
 705         wprintf("\">"
 706                 "<FONT SIZE=-2 COLOR=\"#AAAAAA\">Make this my start page</FONT>"
 707                 "</A>"
 708         );
 709 }
 710
 711
 712 /*
 713  * Change the user's start page
 714  */
 715 void change_start_page(void) {
 716
 717         if (bstr("startpage") == NULL) {
 718                 strcpy(WC->ImportantMessage,
 719                         "startpage set to null");
 720                 display_main_menu();
 721                 return;
 722         }
 723
 724         set_preference("startpage", bstr("startpage"));
 725
 726         output_headers(1, 1, 0, 0, 0, 0, 0);
 727         do_template("newstartpage");
 728         wDumpContent(1);
 729 }
 730
 731
 732
 733
 734 void display_success(char *successmessage)
 735 {
 736         convenience_page("007700", "OK", successmessage);
 737 }
 738
 739
 740
 741 void extract_action(char *actbuf, char *cmdbuf)
 742 {
 743         int i;
 744
 745         strcpy(actbuf, cmdbuf);
 746         if (!strncasecmp(actbuf, "GET /", 5))
 747                 strcpy(actbuf, &actbuf[5]);
 748         if (!strncasecmp(actbuf, "PUT /", 5))
 749                 strcpy(actbuf, &actbuf[5]);
 750         if (!strncasecmp(actbuf, "POST /", 6))
 751                 strcpy(actbuf, &actbuf[6]);
 752
 753         for (i = 0; i < strlen(actbuf); ++i) {
 754                 if (actbuf[i] == ' ') {
 755                         actbuf[i] = 0;
 756                         i = 0;
 757                 }
 758                 if (actbuf[i] == '/') {
 759                         actbuf[i] = 0;
 760                         i = 0;
 761                 }
 762                 if (actbuf[i] == '?') {
 763                         actbuf[i] = 0;
 764                         i = 0;
 765                 }
 766                 if (actbuf[i] == '&') {
 767                         actbuf[i] = 0;
 768                         i = 0;
 769                 }
 770         }
 771 }
 772
 773
 774 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 775                         void *content, char *cbtype, size_t length,
 776                         char *encoding, void *userdata)
 777 {
 778         struct urlcontent *u;
 779
 780         /* Form fields */
 781         if ( (length > 0) && (strlen(cbtype) == 0) ) {
 782                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
 783                 u->next = WC->urlstrings;
 784                 WC->urlstrings = u;
 785                 safestrncpy(u->url_key, name, sizeof(u->url_key));
 786                 u->url_data = malloc(length + 1);
 787                 memcpy(u->url_data, content, length);
 788                 u->url_data[length] = 0;
 789         }
 790
 791         /* Uploaded files */
 792         if ( (length > 0) && (strlen(cbtype) > 0) ) {
 793                 WC->upload = malloc(length);
 794                 if (WC->upload != NULL) {
 795                         WC->upload_length = length;
 796                         safestrncpy(WC->upload_filename, filename,
 797                                         sizeof(WC->upload_filename));
 798                         safestrncpy(WC->upload_content_type, cbtype,
 799                                         sizeof(WC->upload_content_type));
 800                         memcpy(WC->upload, content, length);
 801                 }
 802                 else {
 803                         lprintf(3, "malloc() failed: %s\n", strerror(errno));
 804                 }
 805         }
 806
 807 }
 808
 809
 810
 811
 812 /*
 813  * Entry point for WebCit transaction
 814  */
 815 void session_loop(struct httprequest *req)
 816 {
 817         char cmd[SIZ];
 818         char method[SIZ];
 819         char action[SIZ];
 820         char buf[SIZ];
 821         int a, b;
 822         int ContentLength = 0;
 823         int BytesRead = 0;
 824         char ContentType[512];
 825         char *content;
 826         char *content_end;
 827         struct httprequest *hptr;
 828         char browser_host[SIZ];
 829         char user_agent[SIZ];
 830         int body_start;
 831
 832         /* We stuff these with the values coming from the client cookies,
 833          * so we can use them to reconnect a timed out session if we have to.
 834          */
 835         char c_username[SIZ];
 836         char c_password[SIZ];
 837         char c_roomname[SIZ];
 838         char c_httpauth_string[SIZ];
 839         char c_httpauth_user[SIZ];
 840         char c_httpauth_pass[SIZ];
 841         char cookie[SIZ];
 842
 843         strcpy(c_username, "");
 844         strcpy(c_password, "");
 845         strcpy(c_roomname, "");
 846         strcpy(c_httpauth_string, "");
 847         strcpy(c_httpauth_user, "");
 848         strcpy(c_httpauth_pass, "");
 849
 850         WC->upload_length = 0;
 851         WC->upload = NULL;
 852         WC->vars = NULL;
 853
 854         WC->is_wap = 0;
 855
 856         hptr = req;
 857         if (hptr == NULL) return;
 858
 859         strcpy(cmd, hptr->line);
 860         hptr = hptr->next;
 861         extract_token(method, cmd, 0, ' ');
 862         extract_action(action, cmd);
 863
 864         while (hptr != NULL) {
 865                 strcpy(buf, hptr->line);
 866                 hptr = hptr->next;
 867
 868                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 869                         safestrncpy(cookie, &buf[15], sizeof cookie);
 870                         cookie_to_stuff(cookie, NULL,
 871                                       c_username, c_password, c_roomname);
 872                 }
 873                 else if (!strncasecmp(buf, "Authorization: Basic ", 21)) {
 874                         CtdlDecodeBase64(c_httpauth_string, &buf[21], strlen(&buf[21]));
 875                         extract_token(c_httpauth_user, c_httpauth_string, 0, ':');
 876                         extract_token(c_httpauth_pass, c_httpauth_string, 1, ':');
 877                 }
 878                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 879                         ContentLength = atoi(&buf[16]);
 880                 }
 881                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 882                         safestrncpy(ContentType, &buf[14], sizeof ContentType);
 883                 }
 884                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 885                         safestrncpy(user_agent, &buf[12], sizeof user_agent);
 886                 }
 887                 else if (!strncasecmp(buf, "Host: ", 6)) {
 888                         safestrncpy(WC->http_host, &buf[6], sizeof WC->http_host);
 889                 }
 890                 /* Only WAP gateways explicitly name this content-type */
 891                 else if (strstr(buf, "text/vnd.wap.wml")) {
 892                         WC->is_wap = 1;
 893                 }
 894         }
 895
 896         if (ContentLength > 0) {
 897                 content = malloc(ContentLength + SIZ);
 898                 memset(content, 0, ContentLength + SIZ);
 899                 sprintf(content, "Content-type: %s\n"
 900                                 "Content-length: %d\n\n",
 901                                 ContentType, ContentLength);
 902                 body_start = strlen(content);
 903
 904                 /* Be daring and read it all at once. */
 905                 client_read(WC->http_sock, &content[BytesRead+body_start],
 906                         ContentLength);
 907
 908                 if (!strncasecmp(ContentType,
 909                               "application/x-www-form-urlencoded", 33)) {
 910                         addurls(&content[body_start]);
 911                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 912                         content_end = content + ContentLength + body_start;
 913                         mime_parser(content, content_end, *upload_handler,
 914                                         NULL, NULL, NULL, 0);
 915                 }
 916         } else {
 917                 content = NULL;
 918         }
 919
 920         /* make a note of where we are in case the user wants to save it */
 921         safestrncpy(WC->this_page, cmd, sizeof(WC->this_page));
 922         remove_token(WC->this_page, 2, ' ');
 923         remove_token(WC->this_page, 0, ' ');
 924
 925         /* If there are variables in the URL, we must grab them now */
 926         for (a = 0; a < strlen(cmd); ++a) {
 927                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 928                         for (b = a; b < strlen(cmd); ++b)
 929                                 if (isspace(cmd[b]))
 930                                         cmd[b] = 0;
 931                         addurls(&cmd[a + 1]);
 932                         cmd[a] = 0;
 933                 }
 934         }
 935
 936         /* Static content can be sent without connecting to Citadel. */
 937         if (!strcasecmp(action, "static")) {
 938                 strcpy(buf, &cmd[12]);
 939                 for (a = 0; a < strlen(buf); ++a)
 940                         if (isspace(buf[a]))
 941                                 buf[a] = 0;
 942                 output_static(buf);
 943                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
 944         }
 945
 946         /*
 947          * If we're not connected to a Citadel server, try to hook up the
 948          * connection now.
 949          */
 950         if (!WC->connected) {
 951                 if (!strcasecmp(ctdlhost, "uds")) {
 952                         /* unix domain socket */
 953                         sprintf(buf, "%s/citadel.socket", ctdlport);
 954                         WC->serv_sock = uds_connectsock(buf);
 955                 }
 956                 else {
 957                         /* tcp socket */
 958                         WC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 959                 }
 960
 961                 if (WC->serv_sock < 0) {
 962                         do_logout();
 963                         goto SKIP_ALL_THIS_CRAP;
 964                 }
 965                 else {
 966                         WC->connected = 1;
 967                         serv_gets(buf); /* get the server welcome message */
 968                         locate_host(browser_host, WC->http_sock);
 969                         get_serv_info(browser_host, user_agent);
 970                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
 971                                 wprintf("You are connected to a Citadel "
 972                                         "server running Citadel %d.%02d;\nin "
 973                                         "order to run this version of WebCit "
 974                                         "you must also have Citadel %d.%02d or"
 975                                         " newer.\n\n\n",
 976                                                 serv_info.serv_rev_level / 100,
 977                                                 serv_info.serv_rev_level % 100,
 978                                                 MINIMUM_CIT_VERSION / 100,
 979                                                 MINIMUM_CIT_VERSION % 100
 980                                         );
 981                                 end_webcit_session();
 982                                 goto SKIP_ALL_THIS_CRAP;
 983                         }
 984                 }
 985         }
 986
 987         /*
 988          * Functions which can be performed without logging in
 989          */
 990         if (!strcasecmp(action, "listsub")) {
 991                 do_listsub();
 992                 goto SKIP_ALL_THIS_CRAP;
 993         }
 994 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
 995         if (!strcasecmp(action, "freebusy")) {
 996                 do_freebusy(cmd);
 997                 goto SKIP_ALL_THIS_CRAP;
 998         }
 999 #endif
1000
1001         /*
1002          * If we're not logged in, but we have HTTP Authentication data,
1003          * try logging in to Citadel using that.
1004          */
1005         if ((!WC->logged_in) && (strlen(c_httpauth_user) > 0) && (strlen(c_httpauth_pass) > 0)) {
1006                 serv_printf("USER %s", c_httpauth_user);
1007                 serv_gets(buf);
1008                 if (buf[0] == '3') {
1009                         serv_printf("PASS %s", c_httpauth_pass);
1010                         serv_gets(buf);
1011                         if (buf[0] == '2') {
1012                                 become_logged_in(c_httpauth_user, c_httpauth_pass, buf);
1013                                 strcpy(WC->httpauth_user, c_httpauth_user);
1014                                 strcpy(WC->httpauth_pass, c_httpauth_pass);
1015                         }
1016                 }
1017         }
1018
1019         /*
1020          * The GroupDAV stuff relies on HTTP authentication instead of
1021          * our session's authentication.
1022          */
1023         if (!strncasecmp(action, "groupdav", 8)) {
1024                 groupdav_main(req);
1025                 goto SKIP_ALL_THIS_CRAP;
1026         }
1027
1028         check_for_instant_messages();
1029
1030         /*
1031          * If we're not logged in, but we have username and password cookies
1032          * supplied by the browser, try using them to log in.
1033          */
1034         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
1035                 serv_printf("USER %s", c_username);
1036                 serv_gets(buf);
1037                 if (buf[0] == '3') {
1038                         serv_printf("PASS %s", c_password);
1039                         serv_gets(buf);
1040                         if (buf[0] == '2') {
1041                                 become_logged_in(c_username, c_password, buf);
1042                         }
1043                 }
1044         }
1045         /*
1046          * If we don't have a current room, but a cookie specifying the
1047          * current room is supplied, make an effort to go there.
1048          */
1049         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
1050                 serv_printf("GOTO %s", c_roomname);
1051                 serv_gets(buf);
1052                 if (buf[0] == '2') {
1053                         strcpy(WC->wc_roomname, c_roomname);
1054                 }
1055         }
1056
1057         if (!strcasecmp(action, "image")) {
1058                 output_image();
1059
1060         /*
1061          * All functions handled below this point ... make sure we log in
1062          * before doing anything else!
1063          */
1064         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
1065                 do_login();
1066         } else if (!WC->logged_in) {
1067                 display_login(NULL);
1068         }
1069
1070         /*
1071          * Various commands...
1072          */
1073
1074         else if (!strcasecmp(action, "do_welcome")) {
1075                 do_welcome();
1076         } else if (!strcasecmp(action, "blank")) {
1077                 blank_page();
1078         } else if (!strcasecmp(action, "do_template")) {
1079                 url_do_template();
1080         } else if (!strcasecmp(action, "display_main_menu")) {
1081                 display_main_menu();
1082         } else if (!strcasecmp(action, "whobbs")) {
1083                 whobbs();
1084         } else if (!strcasecmp(action, "knrooms")) {
1085                 knrooms();
1086         } else if (!strcasecmp(action, "gotonext")) {
1087                 slrp_highest();
1088                 gotonext();
1089         } else if (!strcasecmp(action, "skip")) {
1090                 gotonext();
1091         } else if (!strcasecmp(action, "ungoto")) {
1092                 ungoto();
1093         } else if (!strcasecmp(action, "dotgoto")) {
1094                 slrp_highest();
1095                 smart_goto(bstr("room"));
1096         } else if (!strcasecmp(action, "dotskip")) {
1097                 smart_goto(bstr("room"));
1098         } else if (!strcasecmp(action, "termquit")) {
1099                 do_logout();
1100         } else if (!strcasecmp(action, "readnew")) {
1101                 readloop("readnew");
1102         } else if (!strcasecmp(action, "readold")) {
1103                 readloop("readold");
1104         } else if (!strcasecmp(action, "readfwd")) {
1105                 readloop("readfwd");
1106         } else if (!strcasecmp(action, "headers")) {
1107                 readloop("headers");
1108         } else if (!strcasecmp(action, "display_enter")) {
1109                 display_enter();
1110         } else if (!strcasecmp(action, "post")) {
1111                 post_message();
1112         } else if (!strcasecmp(action, "do_stuff_to_one_msg")) {
1113                 do_stuff_to_one_msg();
1114         } else if (!strcasecmp(action, "move_msg")) {
1115                 move_msg();
1116         } else if (!strcasecmp(action, "userlist")) {
1117                 userlist();
1118         } else if (!strcasecmp(action, "showuser")) {
1119                 showuser();
1120         } else if (!strcasecmp(action, "display_page")) {
1121                 display_page();
1122         } else if (!strcasecmp(action, "page_user")) {
1123                 page_user();
1124         } else if (!strcasecmp(action, "chat")) {
1125                 do_chat();
1126         } else if (!strcasecmp(action, "display_private")) {
1127                 display_private("", 0);
1128         } else if (!strcasecmp(action, "goto_private")) {
1129                 goto_private();
1130         } else if (!strcasecmp(action, "zapped_list")) {
1131                 zapped_list();
1132         } else if (!strcasecmp(action, "display_zap")) {
1133                 display_zap();
1134         } else if (!strcasecmp(action, "zap")) {
1135                 zap();
1136         } else if (!strcasecmp(action, "display_entroom")) {
1137                 display_entroom();
1138         } else if (!strcasecmp(action, "entroom")) {
1139                 entroom();
1140         } else if (!strcasecmp(action, "display_editroom")) {
1141                 display_editroom();
1142         } else if (!strcasecmp(action, "netedit")) {
1143                 netedit();
1144         } else if (!strcasecmp(action, "editroom")) {
1145                 editroom();
1146         } else if (!strcasecmp(action, "display_whok")) {
1147                 display_whok();
1148         } else if (!strcasecmp(action, "display_editinfo")) {
1149                 display_edit("Room info", "EINF 0", "RINF", "/editinfo", 1);
1150         } else if (!strcasecmp(action, "editinfo")) {
1151                 save_edit("Room info", "EINF 1", 1);
1152         } else if (!strcasecmp(action, "display_editbio")) {
1153                 sprintf(buf, "RBIO %s", WC->wc_username);
1154                 display_edit("Your bio", "NOOP", buf, "editbio", 3);
1155         } else if (!strcasecmp(action, "editbio")) {
1156                 save_edit("Your bio", "EBIO", 0);
1157         } else if (!strcasecmp(action, "confirm_delete_room")) {
1158                 confirm_delete_room();
1159         } else if (!strcasecmp(action, "delete_room")) {
1160                 delete_room();
1161         } else if (!strcasecmp(action, "validate")) {
1162                 validate();
1163         } else if (!strcasecmp(action, "display_editpic")) {
1164                 display_graphics_upload("your photo",
1165                                         "UIMG 0|_userpic_",
1166                                         "/editpic");
1167         } else if (!strcasecmp(action, "editpic")) {
1168                 do_graphics_upload("UIMG 1|_userpic_");
1169         } else if (!strcasecmp(action, "display_editroompic")) {
1170                 display_graphics_upload("the graphic for this room",
1171                                         "UIMG 0|_roompic_",
1172                                         "/editroompic");
1173         } else if (!strcasecmp(action, "editroompic")) {
1174                 do_graphics_upload("UIMG 1|_roompic_");
1175         } else if (!strcasecmp(action, "delete_floor")) {
1176                 delete_floor();
1177         } else if (!strcasecmp(action, "rename_floor")) {
1178                 rename_floor();
1179         } else if (!strcasecmp(action, "create_floor")) {
1180                 create_floor();
1181         } else if (!strcasecmp(action, "display_editfloorpic")) {
1182                 sprintf(buf, "UIMG 0|_floorpic_|%s",
1183                         bstr("which_floor"));
1184                 display_graphics_upload("the graphic for this floor",
1185                                         buf,
1186                                         "/editfloorpic");
1187         } else if (!strcasecmp(action, "editfloorpic")) {
1188                 sprintf(buf, "UIMG 1|_floorpic_|%s",
1189                         bstr("which_floor"));
1190                 do_graphics_upload(buf);
1191         } else if (!strcasecmp(action, "display_reg")) {
1192                 display_reg(0);
1193         } else if (!strcasecmp(action, "display_changepw")) {
1194                 display_changepw();
1195         } else if (!strcasecmp(action, "changepw")) {
1196                 changepw();
1197         } else if (!strcasecmp(action, "display_edit_node")) {
1198                 display_edit_node();
1199         } else if (!strcasecmp(action, "edit_node")) {
1200                 edit_node();
1201         } else if (!strcasecmp(action, "display_netconf")) {
1202                 display_netconf();
1203         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
1204                 display_confirm_delete_node();
1205         } else if (!strcasecmp(action, "delete_node")) {
1206                 delete_node();
1207         } else if (!strcasecmp(action, "display_add_node")) {
1208                 display_add_node();
1209         } else if (!strcasecmp(action, "add_node")) {
1210                 add_node();
1211         } else if (!strcasecmp(action, "terminate_session")) {
1212                 slrp_highest();
1213                 terminate_session();
1214         } else if (!strcasecmp(action, "edit_me")) {
1215                 edit_me();
1216         } else if (!strcasecmp(action, "display_siteconfig")) {
1217                 display_siteconfig();
1218         } else if (!strcasecmp(action, "chat_recv")) {
1219                 chat_recv();
1220         } else if (!strcasecmp(action, "chat_send")) {
1221                 chat_send();
1222         } else if (!strcasecmp(action, "siteconfig")) {
1223                 siteconfig();
1224         } else if (!strcasecmp(action, "display_generic")) {
1225                 display_generic();
1226         } else if (!strcasecmp(action, "do_generic")) {
1227                 do_generic();
1228         } else if (!strcasecmp(action, "display_menubar")) {
1229                 display_menubar(1);
1230         } else if (!strcasecmp(action, "output_mimepart")) {
1231                 output_mimepart();
1232         } else if (!strcasecmp(action, "edit_vcard")) {
1233                 edit_vcard();
1234         } else if (!strcasecmp(action, "submit_vcard")) {
1235                 submit_vcard();
1236         } else if (!strcasecmp(action, "select_user_to_edit")) {
1237                 select_user_to_edit(NULL, NULL);
1238         } else if (!strcasecmp(action, "display_edituser")) {
1239                 display_edituser(NULL, 0);
1240         } else if (!strcasecmp(action, "edituser")) {
1241                 edituser();
1242         } else if (!strcasecmp(action, "create_user")) {
1243                 create_user();
1244         } else if (!strcasecmp(action, "changeview")) {
1245                 change_view();
1246         } else if (!strcasecmp(action, "do_stuff_to_msgs")) {
1247                 do_stuff_to_msgs();
1248         } else if (!strcasecmp(action, "change_start_page")) {
1249                 change_start_page();
1250         } else if (!strcasecmp(action, "display_floorconfig")) {
1251                 display_floorconfig(NULL);
1252         } else if (!strcasecmp(action, "toggle_self_service")) {
1253                 toggle_self_service();
1254 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1255         } else if (!strcasecmp(action, "display_edit_task")) {
1256                 display_edit_task();
1257         } else if (!strcasecmp(action, "save_task")) {
1258                 save_task();
1259         } else if (!strcasecmp(action, "display_edit_event")) {
1260                 display_edit_event();
1261         } else if (!strcasecmp(action, "save_event")) {
1262                 save_event();
1263         } else if (!strcasecmp(action, "respond_to_request")) {
1264                 respond_to_request();
1265         } else if (!strcasecmp(action, "handle_rsvp")) {
1266                 handle_rsvp();
1267 #endif
1268         } else if (!strcasecmp(action, "summary")) {
1269                 summary();
1270         } else if (!strcasecmp(action, "iconbar")) {
1271                 do_iconbar();
1272         } else if (!strcasecmp(action, "display_customize_iconbar")) {
1273                 display_customize_iconbar();
1274         } else if (!strcasecmp(action, "commit_iconbar")) {
1275                 commit_iconbar();
1276         } else if (!strcasecmp(action, "set_room_policy")) {
1277                 set_room_policy();
1278         } else if (!strcasecmp(action, "display_inetconf")) {
1279                 display_inetconf();
1280         } else if (!strcasecmp(action, "save_inetconf")) {
1281                 save_inetconf();
1282         } else if (!strcasecmp(action, "diagnostics")) {
1283                 output_headers(1, 1, 1, 0, 0, 0, 0);
1284
1285                 wprintf("You're in session %d<hr />\n", WC->wc_session);
1286                 wprintf("Command: <br /><PRE>\n");
1287                 escputs(cmd);
1288                 wprintf("</PRE><hr />\n");
1289                 wprintf("Variables: <br /><PRE>\n");
1290                 dump_vars();
1291                 wprintf("</PRE><hr />\n");
1292                 wDumpContent(1);
1293         }
1294         /* When all else fais, display the main menu. */
1295         else {
1296                 display_main_menu();
1297         }
1298
1299 SKIP_ALL_THIS_CRAP:
1300         fflush(stdout);
1301         if (content != NULL) {
1302                 free(content);
1303                 content = NULL;
1304         }
1305         free_urls();
1306         if (WC->upload_length > 0) {
1307                 free(WC->upload);
1308                 WC->upload_length = 0;
1309         }
1310
1311 }