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                 do_template("trailing");
 179         }
 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  * control codes:
 343  *
 344  * Bits 0 and 1:
 345  * 0 = Nothing.  Do not display any leading HTTP or HTML.
 346  * 1 = HTTP headers plus the room banner
 347  * 2 = HTTP headers required to terminate the session (unset cookies)
 348  * 3 = HTTP and HTML headers, but no room banner
 349  *
 350  * Bit 2: Set to 1 to auto-refresh page every 30 seconds
 351  * Bit 3: suppress check for express messages
 352  * Bit 4: Allow browser to cache this document
 353  *
 354  */
 355 void output_headers(int controlcode)
 356 {
 357         char cookie[SIZ];
 358         int print_standard_html_head = 0;
 359         int refresh30 = 0;
 360         int suppress_check = 0;
 361         int cache = 0;
 362         char httpnow[SIZ];
 363         char onload_fcn[SIZ];
 364         static int pageseq = 0;
 365         print_standard_html_head        =       controlcode & 0x03;
 366         refresh30                       =       ((controlcode & 0x04) >> 2);
 367         suppress_check                  =       ((controlcode & 0x08) >> 3);
 368         cache                           =       ((controlcode & 0x10) >> 4);
 369
 370
 371         wprintf("HTTP/1.0 200 OK\n");
 372
 373         httpdate(httpnow, time(NULL));
 374
 375         if (print_standard_html_head > 0) {
 376                 wprintf("Content-type: text/html\n"
 377                         "Server: %s\n", SERVER
 378                 );
 379                 if (!cache)
 380                         wprintf("Connection: close\n"
 381                                 "Pragma: no-cache\n"
 382                                 "Cache-Control: no-store\n"
 383                         );
 384         }
 385
 386         stuff_to_cookie(cookie, WC->wc_session, WC->wc_username,
 387                         WC->wc_password, WC->wc_roomname);
 388
 389         if (print_standard_html_head == 2) {
 390                 wprintf("Set-cookie: webcit=%s; path=/\n", unset);
 391         } else {
 392                 wprintf("Set-cookie: webcit=%s; path=/\n", cookie);
 393                 if (server_cookie != NULL) {
 394                         wprintf("%s\n", server_cookie);
 395                 }
 396         }
 397
 398         if (print_standard_html_head > 0) {
 399                 wprintf("\n");
 400
 401                 if (refresh30) {
 402                         svprintf("REFRESHTAG", WCS_STRING, "%s",
 403                                 "<META HTTP-EQUIV=\"refresh\" CONTENT=\"30\">\n");
 404                 }
 405                 else {
 406                         svprintf("REFRESHTAG", WCS_STRING, "%s",
 407                                 "<META HTTP-EQUIV=\"refresh\" CONTENT=\"500363689;\">\n");
 408                 }
 409
 410                 /* script for checking for pages (not always launched) */
 411
 412                 sprintf(onload_fcn, "function onload_fcn() { \n");
 413                 if (!WC->outside_frameset_allowed) {
 414                         strcat(onload_fcn, "  force_frameset();  \n");
 415                 }
 416                 if (!suppress_check) if (WC->HaveExpressMessages) {
 417                         strcat(onload_fcn, "  launch_page_popup();  \n");
 418                         WC->HaveExpressMessages = 0;
 419                 }
 420                 strcat(onload_fcn, "} \n");
 421
 422                 svprintf("PAGERSCRIPT", WCS_STRING,
 423                         "<SCRIPT LANGUAGE=\"JavaScript\">\n"
 424                         "function launch_page_popup() {\n"
 425                         "pwin = window.open('/page_popup', 'CitaPage%d', "
 426                         "'toolbar=no,location=no,copyhistory=no,status=no,"
 427                         "scrollbars=yes,resizable=no,height=250,width=400');\n"
 428                         "}\n"
 429                         "function force_frameset() { \n"
 430                         " if (top.frames.length == 0) { \n"
 431                         "  top.location.replace('/do_welcome'); \n"
 432                         " } \n"
 433                         "} \n"
 434                         "%s\n"
 435                         "</SCRIPT>\n",
 436                         ++pageseq,
 437                         onload_fcn
 438                 );
 439                 /* end script */
 440
 441                 do_template("head");
 442
 443                 svprintf("extrabodyparms", WCS_STRING, "%s",
 444                         "onload='onload_fcn();' ");
 445
 446                 do_template("background");
 447         }
 448
 449         if (print_standard_html_head == 1) {
 450                 wprintf("<A NAME=\"TheTop\"></A>");
 451                 embed_room_banner(NULL);
 452         }
 453
 454         if (strlen(WC->ImportantMessage) > 0) {
 455                 do_template("beginbox_nt");
 456                 wprintf("<SPAN CLASS=\"errormsg\">"
 457                         "%s</SPAN><BR>\n", WC->ImportantMessage);
 458                 do_template("endbox");
 459                 strcpy(WC->ImportantMessage, "");
 460         }
 461 }
 462
 463
 464 /*
 465  *
 466  */
 467 void http_redirect(char *whichpage) {
 468         wprintf("HTTP/1.0 302 Moved Temporarily\n");
 469         wprintf("Location: %s\n", whichpage);
 470         wprintf("URI: %s\n", whichpage);
 471         wprintf("Content-type: text/html\n\n");
 472         wprintf("<html><body>\n");
 473         wprintf("you really want to be <A HREF=\"%s\">here</A> now\n",
 474                 whichpage);
 475         wprintf("</body></html>\n");
 476 }
 477
 478
 479
 480 void check_for_express_messages()
 481 {
 482         char buf[SIZ];
 483
 484         serv_puts("NOOP");
 485         serv_gets(buf);
 486         if (buf[3] == '*') WC->HaveExpressMessages = 1;
 487 }
 488
 489
 490
 491
 492 /*
 493  * Output a piece of content to the web browser
 494  */
 495 void http_transmit_thing(char *thing, size_t length, char *content_type,
 496                          int is_static) {
 497         output_headers(is_static ? 0x10 : 0x00);
 498         wprintf("Content-type: %s\n"
 499                 "Content-length: %ld\n"
 500                 "Server: %s\n"
 501                 "Connection: close\n"
 502                 "\n",
 503                 content_type,
 504                 (long) length,
 505                 SERVER
 506         );
 507         client_write(thing, (size_t)length);
 508 }
 509
 510
 511
 512
 513 void output_static(char *what)
 514 {
 515         char buf[4096];
 516         FILE *fp;
 517         struct stat statbuf;
 518         off_t bytes;
 519         char *bigbuffer;
 520         char content_type[SIZ];
 521
 522         sprintf(buf, "static/%s", what);
 523         fp = fopen(buf, "rb");
 524         if (fp == NULL) {
 525                 wprintf("HTTP/1.0 404 %s\n", strerror(errno));
 526                 wprintf("Content-Type: text/plain\n");
 527                 wprintf("\n");
 528                 wprintf("Cannot open %s: %s\n", what, strerror(errno));
 529         } else {
 530                 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
 531                         strcpy(content_type, "image/gif");
 532                 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
 533                         strcpy(content_type, "text/plain");
 534                 else if (!strncasecmp(&what[strlen(what) - 4], ".css", 4))
 535                         strcpy(content_type, "text/css");
 536                 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
 537                         strcpy(content_type, "image/jpeg");
 538                 else if (!strncasecmp(&what[strlen(what) - 4], ".png", 4))
 539                         strcpy(content_type, "image/png");
 540                 else if (!strncasecmp(&what[strlen(what) - 4], ".ico", 4))
 541                         strcpy(content_type, "image/x-icon");
 542                 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
 543                         strcpy(content_type, "text/html");
 544                 else if (!strncasecmp(&what[strlen(what) - 4], ".htm", 4))
 545                         strcpy(content_type, "text/html");
 546                 else if (!strncasecmp(&what[strlen(what) - 4], ".wml", 4))
 547                         strcpy(content_type, "text/vnd.wap.wml");
 548                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmls", 5))
 549                         strcpy(content_type, "text/vnd.wap.wmlscript");
 550                 else if (!strncasecmp(&what[strlen(what) - 5], ".wmlc", 5))
 551                         strcpy(content_type, "application/vnd.wap.wmlc");
 552                 else if (!strncasecmp(&what[strlen(what) - 6], ".wmlsc", 6))
 553                         strcpy(content_type, "application/vnd.wap.wmlscriptc");
 554                 else if (!strncasecmp(&what[strlen(what) - 5], ".wbmp", 5))
 555                         strcpy(content_type, "image/vnd.wap.wbmp");
 556                 else if (!strncasecmp(&what[strlen(what) - 3], ".js", 3))
 557                         strcpy(content_type, "text/javascript");
 558                 else
 559                         strcpy(content_type, "application/octet-stream");
 560
 561                 fstat(fileno(fp), &statbuf);
 562                 bytes = statbuf.st_size;
 563                 lprintf(3, "Static: %s, (%s; %ld bytes)\n", what, content_type, bytes);
 564                 bigbuffer = malloc(bytes + 2);
 565                 fread(bigbuffer, bytes, 1, fp);
 566                 fclose(fp);
 567
 568                 http_transmit_thing(bigbuffer, (size_t)bytes, content_type, 1);
 569                 free(bigbuffer);
 570         }
 571         if (!strcasecmp(bstr("force_close_session"), "yes")) {
 572                 end_webcit_session();
 573         }
 574 }
 575
 576
 577 /*
 578  * When the browser requests an image file from the Citadel server,
 579  * this function is called to transmit it.
 580  */
 581 void output_image()
 582 {
 583         char buf[SIZ];
 584         char *xferbuf = NULL;
 585         off_t bytes;
 586
 587         serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
 588         serv_gets(buf);
 589         if (buf[0] == '2') {
 590                 bytes = extract_long(&buf[4], 0);
 591                 xferbuf = malloc(bytes + 2);
 592
 593                 /* Read it from the server */
 594                 read_server_binary(xferbuf, bytes);
 595                 serv_puts("CLOS");
 596                 serv_gets(buf);
 597
 598                 /* Write it to the browser */
 599                 http_transmit_thing(xferbuf, (size_t)bytes, "image/gif", 0);
 600                 free(xferbuf);
 601
 602         } else {
 603
 604                 /* Instead of an ugly 404, send a 1x1 transparent GIF
 605                  * when there's no such image on the server.
 606                  */
 607                 output_static("blank.gif");
 608
 609                 /*
 610                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 611                 output_headers(0);
 612                 wprintf("Content-Type: text/plain\n"
 613                         "\n"
 614                         "Error retrieving image: %s\n",
 615                         &buf[4]
 616                 );
 617                 */
 618
 619         }
 620
 621
 622
 623 }
 624
 625 /*
 626  */
 627 void output_mimepart()
 628 {
 629         char buf[SIZ];
 630         off_t bytes;
 631         char content_type[SIZ];
 632         char *content = NULL;
 633
 634         serv_printf("OPNA %s|%s", bstr("msgnum"), bstr("partnum"));
 635         serv_gets(buf);
 636         if (buf[0] == '2') {
 637                 bytes = extract_long(&buf[4], 0);
 638                 content = malloc(bytes + 2);
 639                 extract(content_type, &buf[4], 3);
 640                 output_headers(0);
 641                 read_server_binary(content, bytes);
 642                 serv_puts("CLOS");
 643                 serv_gets(buf);
 644                 http_transmit_thing(content, bytes, content_type, 0);
 645                 free(content);
 646         } else {
 647                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 648                 output_headers(0);
 649                 wprintf("Content-Type: text/plain\n");
 650                 wprintf("\n");
 651                 wprintf("Error retrieving part: %s\n", &buf[4]);
 652         }
 653
 654 }
 655
 656
 657 /*
 658  */
 659 char *load_mimepart(long msgnum, char *partnum)
 660 {
 661         char buf[SIZ];
 662         off_t bytes;
 663         char content_type[SIZ];
 664         char *content;
 665
 666         serv_printf("OPNA %ld|%s", msgnum, partnum);
 667         serv_gets(buf);
 668         if (buf[0] == '2') {
 669                 bytes = extract_long(&buf[4], 0);
 670                 extract(content_type, &buf[4], 3);
 671
 672                 content = malloc(bytes + 2);
 673                 read_server_binary(content, bytes);
 674
 675                 serv_puts("CLOS");
 676                 serv_gets(buf);
 677                 content[bytes] = 0;     /* null terminate for good measure */
 678                 return(content);
 679         }
 680         else {
 681                 return(NULL);
 682         }
 683
 684 }
 685
 686
 687 /*
 688  * Convenience functions to display a page containing only a string
 689  */
 690 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 691 {
 692         wprintf("HTTP/1.0 200 OK\n");
 693         output_headers(1);
 694         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#%s\"><TR><TD>", titlebarcolor);
 695         wprintf("<SPAN CLASS=\"titlebar\">%s</SPAN>\n", titlebarmsg);
 696         wprintf("</TD></TR></TABLE><BR>\n");
 697         escputs(messagetext);
 698
 699         wprintf("<HR>\n");
 700         wDumpContent(1);
 701 }
 702
 703
 704 /*
 705  * Display a blank page.
 706  */
 707 void blank_page(void) {
 708         output_headers(7);
 709         wDumpContent(2);
 710 }
 711
 712
 713 /*
 714  * A template has been requested
 715  */
 716 void url_do_template(void) {
 717         do_template(bstr("template"));
 718 }
 719
 720
 721
 722 /*
 723  * Offer to make any page the user's "start page."
 724  */
 725 void offer_start_page(void) {
 726         wprintf("<A HREF=\"/change_start_page?startpage=");
 727         urlescputs(WC->this_page);
 728         wprintf("\">"
 729                 "<FONT SIZE=-2 COLOR=\"#AAAAAA\">Make this my start page</FONT>"
 730                 "</A>"
 731         );
 732 }
 733
 734
 735 /*
 736  * Change the user's start page
 737  */
 738 void change_start_page(void) {
 739
 740         if (bstr("startpage") == NULL) {
 741                 strcpy(WC->ImportantMessage,
 742                         "startpage set to null");
 743                 display_main_menu();
 744                 return;
 745         }
 746
 747         set_preference("startpage", bstr("startpage"));
 748
 749         output_headers(3);
 750         do_template("newstartpage");
 751         wDumpContent(1);
 752 }
 753
 754
 755
 756
 757 void display_success(char *successmessage)
 758 {
 759         convenience_page("007700", "OK", successmessage);
 760 }
 761
 762
 763
 764 void extract_action(char *actbuf, char *cmdbuf)
 765 {
 766         int i;
 767
 768         strcpy(actbuf, cmdbuf);
 769         if (!strncasecmp(actbuf, "GET /", 5))
 770                 strcpy(actbuf, &actbuf[5]);
 771         if (!strncasecmp(actbuf, "PUT /", 5))
 772                 strcpy(actbuf, &actbuf[5]);
 773         if (!strncasecmp(actbuf, "POST /", 6))
 774                 strcpy(actbuf, &actbuf[6]);
 775
 776         for (i = 0; i < strlen(actbuf); ++i) {
 777                 if (actbuf[i] == ' ') {
 778                         actbuf[i] = 0;
 779                         i = 0;
 780                 }
 781                 if (actbuf[i] == '/') {
 782                         actbuf[i] = 0;
 783                         i = 0;
 784                 }
 785                 if (actbuf[i] == '?') {
 786                         actbuf[i] = 0;
 787                         i = 0;
 788                 }
 789                 if (actbuf[i] == '&') {
 790                         actbuf[i] = 0;
 791                         i = 0;
 792                 }
 793         }
 794 }
 795
 796
 797 void upload_handler(char *name, char *filename, char *partnum, char *disp,
 798                         void *content, char *cbtype, size_t length,
 799                         char *encoding, void *userdata)
 800 {
 801         struct urlcontent *u;
 802
 803         /* Form fields */
 804         if ( (length > 0) && (strlen(cbtype) == 0) ) {
 805                 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
 806                 u->next = WC->urlstrings;
 807                 WC->urlstrings = u;
 808                 safestrncpy(u->url_key, name, sizeof(u->url_key));
 809                 u->url_data = malloc(length + 1);
 810                 memcpy(u->url_data, content, length);
 811                 u->url_data[length] = 0;
 812         }
 813
 814         /* Uploaded files */
 815         if ( (length > 0) && (strlen(cbtype) > 0) ) {
 816                 WC->upload = malloc(length);
 817                 if (WC->upload != NULL) {
 818                         WC->upload_length = length;
 819                         safestrncpy(WC->upload_filename, filename,
 820                                         sizeof(WC->upload_filename));
 821                         safestrncpy(WC->upload_content_type, cbtype,
 822                                         sizeof(WC->upload_content_type));
 823                         memcpy(WC->upload, content, length);
 824                 }
 825                 else {
 826                         lprintf(3, "malloc() failed: %s\n", strerror(errno));
 827                 }
 828         }
 829
 830 }
 831
 832
 833
 834
 835 /*
 836  * Entry point for WebCit transaction
 837  */
 838 void session_loop(struct httprequest *req)
 839 {
 840         char cmd[SIZ];
 841         char action[SIZ];
 842         char buf[SIZ];
 843         int a, b;
 844         int ContentLength = 0;
 845         int BytesRead = 0;
 846         char ContentType[512];
 847         char *content;
 848         char *content_end;
 849         struct httprequest *hptr;
 850         char browser_host[SIZ];
 851         char user_agent[SIZ];
 852         int body_start;
 853
 854         /* We stuff these with the values coming from the client cookies,
 855          * so we can use them to reconnect a timed out session if we have to.
 856          */
 857         char c_username[SIZ];
 858         char c_password[SIZ];
 859         char c_roomname[SIZ];
 860         char cookie[SIZ];
 861
 862         strcpy(c_username, "");
 863         strcpy(c_password, "");
 864         strcpy(c_roomname, "");
 865
 866         WC->upload_length = 0;
 867         WC->upload = NULL;
 868         WC->vars = NULL;
 869
 870         WC->is_wap = 0;
 871
 872         hptr = req;
 873         if (hptr == NULL) return;
 874
 875         strcpy(cmd, hptr->line);
 876         hptr = hptr->next;
 877         extract_action(action, cmd);
 878
 879         while (hptr != NULL) {
 880                 strcpy(buf, hptr->line);
 881                 hptr = hptr->next;
 882
 883                 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
 884                         safestrncpy(cookie, &buf[15], sizeof cookie);
 885                         cookie_to_stuff(cookie, NULL,
 886                                       c_username, c_password, c_roomname);
 887                 }
 888                 else if (!strncasecmp(buf, "Content-length: ", 16)) {
 889                         ContentLength = atoi(&buf[16]);
 890                 }
 891                 else if (!strncasecmp(buf, "Content-type: ", 14)) {
 892                         safestrncpy(ContentType, &buf[14], sizeof ContentType);
 893                 }
 894                 else if (!strncasecmp(buf, "User-agent: ", 12)) {
 895                         safestrncpy(user_agent, &buf[12], sizeof user_agent);
 896                 }
 897                 else if (!strncasecmp(buf, "Host: ", 6)) {
 898                         safestrncpy(WC->http_host, &buf[6], sizeof WC->http_host);
 899                 }
 900                 /* Only WAP gateways explicitly name this content-type */
 901                 else if (strstr(buf, "text/vnd.wap.wml")) {
 902                         WC->is_wap = 1;
 903                 }
 904         }
 905
 906         if (ContentLength > 0) {
 907                 content = malloc(ContentLength + SIZ);
 908                 memset(content, 0, ContentLength + SIZ);
 909                 sprintf(content, "Content-type: %s\n"
 910                                 "Content-length: %d\n\n",
 911                                 ContentType, ContentLength);
 912                 body_start = strlen(content);
 913
 914 /***** old version
 915                 BytesRead = 0;
 916                 while (BytesRead < ContentLength) {
 917                         a=read(WC->http_sock, &content[BytesRead+body_start],
 918                                 ContentLength - BytesRead);
 919                         if (a <= 0) BytesRead = ContentLength;
 920                         else BytesRead += a;
 921                 }
 922 *******/
 923
 924                 /* Now we're daring and read it all at once. */
 925                 client_read(WC->http_sock, &content[BytesRead+body_start], ContentLength);
 926
 927                 if (!strncasecmp(ContentType,
 928                               "application/x-www-form-urlencoded", 33)) {
 929                         addurls(&content[body_start]);
 930                 } else if (!strncasecmp(ContentType, "multipart", 9)) {
 931                         content_end = content + ContentLength + body_start;
 932                         mime_parser(content, content_end, *upload_handler,
 933                                         NULL, NULL, NULL, 0);
 934                 }
 935         } else {
 936                 content = NULL;
 937         }
 938
 939         /* make a note of where we are in case the user wants to save it */
 940         safestrncpy(WC->this_page, cmd, sizeof(WC->this_page));
 941         remove_token(WC->this_page, 2, ' ');
 942         remove_token(WC->this_page, 0, ' ');
 943
 944         /* If there are variables in the URL, we must grab them now */
 945         for (a = 0; a < strlen(cmd); ++a) {
 946                 if ((cmd[a] == '?') || (cmd[a] == '&')) {
 947                         for (b = a; b < strlen(cmd); ++b)
 948                                 if (isspace(cmd[b]))
 949                                         cmd[b] = 0;
 950                         addurls(&cmd[a + 1]);
 951                         cmd[a] = 0;
 952                 }
 953         }
 954
 955         /* Static content can be sent without connecting to Citadel. */
 956         if (!strcasecmp(action, "static")) {
 957                 strcpy(buf, &cmd[12]);
 958                 for (a = 0; a < strlen(buf); ++a)
 959                         if (isspace(buf[a]))
 960                                 buf[a] = 0;
 961                 output_static(buf);
 962                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
 963         }
 964
 965         /*
 966          * If we're not connected to a Citadel server, try to hook up the
 967          * connection now.
 968          */
 969         if (!WC->connected) {
 970                 if (!strcasecmp(ctdlhost, "uds")) {
 971                         /* unix domain socket */
 972                         sprintf(buf, "%s/citadel.socket", ctdlport);
 973                         WC->serv_sock = uds_connectsock(buf);
 974                 }
 975                 else {
 976                         /* tcp socket */
 977                         WC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 978                 }
 979
 980                 if (WC->serv_sock < 0) {
 981                         do_logout();
 982                         goto SKIP_ALL_THIS_CRAP;
 983                 }
 984                 else {
 985                         WC->connected = 1;
 986                         serv_gets(buf); /* get the server welcome message */
 987                         locate_host(browser_host, WC->http_sock);
 988                         get_serv_info(browser_host, user_agent);
 989                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
 990                                 wprintf("You are connected to a Citadel "
 991                                         "server running Citadel %d.%02d;\nin "
 992                                         "order to run this version of WebCit "
 993                                         "you must also have Citadel %d.%02d or"
 994                                         " newer.\n\n\n",
 995                                                 serv_info.serv_rev_level / 100,
 996                                                 serv_info.serv_rev_level % 100,
 997                                                 MINIMUM_CIT_VERSION / 100,
 998                                                 MINIMUM_CIT_VERSION % 100
 999                                         );
1000                                 end_webcit_session();
1001                                 goto SKIP_ALL_THIS_CRAP;
1002                         }
1003                 }
1004         }
1005
1006         /*
1007          * Functions which can be performed without logging in
1008          */
1009         if (!strcasecmp(action, "listsub")) {
1010                 do_listsub();
1011                 goto SKIP_ALL_THIS_CRAP;
1012         }
1013 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1014         if (!strcasecmp(action, "freebusy")) {
1015                 do_freebusy(cmd);
1016                 goto SKIP_ALL_THIS_CRAP;
1017         }
1018 #endif
1019
1020         check_for_express_messages();
1021
1022         /*
1023          * If we're not logged in, but we have username and password cookies
1024          * supplied by the browser, try using them to log in.
1025          */
1026         if ((!WC->logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
1027                 serv_printf("USER %s", c_username);
1028                 serv_gets(buf);
1029                 if (buf[0] == '3') {
1030                         serv_printf("PASS %s", c_password);
1031                         serv_gets(buf);
1032                         if (buf[0] == '2') {
1033                                 become_logged_in(c_username, c_password, buf);
1034                         }
1035                 }
1036         }
1037         /*
1038          * If we don't have a current room, but a cookie specifying the
1039          * current room is supplied, make an effort to go there.
1040          */
1041         if ((strlen(WC->wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
1042                 serv_printf("GOTO %s", c_roomname);
1043                 serv_gets(buf);
1044                 if (buf[0] == '2') {
1045                         strcpy(WC->wc_roomname, c_roomname);
1046                 }
1047         }
1048
1049         if (!strcasecmp(action, "image")) {
1050                 output_image();
1051
1052         /*
1053          * All functions handled below this point ... make sure we log in
1054          * before doing anything else!
1055          */
1056         } else if ((!WC->logged_in) && (!strcasecmp(action, "login"))) {
1057                 do_login();
1058         } else if (!WC->logged_in) {
1059                 display_login(NULL);
1060         }
1061
1062         /*
1063          * Various commands...
1064          */
1065
1066         else if (!strcasecmp(action, "do_welcome")) {
1067                 do_welcome();
1068         } else if (!strcasecmp(action, "blank")) {
1069                 blank_page();
1070         } else if (!strcasecmp(action, "do_template")) {
1071                 url_do_template();
1072         } else if (!strcasecmp(action, "display_main_menu")) {
1073                 display_main_menu();
1074         } else if (!strcasecmp(action, "whobbs")) {
1075                 whobbs();
1076         } else if (!strcasecmp(action, "knrooms")) {
1077                 knrooms();
1078         } else if (!strcasecmp(action, "gotonext")) {
1079                 slrp_highest();
1080                 gotonext();
1081         } else if (!strcasecmp(action, "skip")) {
1082                 gotonext();
1083         } else if (!strcasecmp(action, "ungoto")) {
1084                 ungoto();
1085         } else if (!strcasecmp(action, "dotgoto")) {
1086                 slrp_highest();
1087                 smart_goto(bstr("room"));
1088         } else if (!strcasecmp(action, "dotskip")) {
1089                 smart_goto(bstr("room"));
1090         } else if (!strcasecmp(action, "termquit")) {
1091                 do_logout();
1092         } else if (!strcasecmp(action, "readnew")) {
1093                 readloop("readnew");
1094         } else if (!strcasecmp(action, "readold")) {
1095                 readloop("readold");
1096         } else if (!strcasecmp(action, "readfwd")) {
1097                 readloop("readfwd");
1098         } else if (!strcasecmp(action, "headers")) {
1099                 readloop("headers");
1100         } else if (!strcasecmp(action, "display_enter")) {
1101                 display_enter();
1102         } else if (!strcasecmp(action, "post")) {
1103                 post_message();
1104         } else if (!strcasecmp(action, "do_stuff_to_one_msg")) {
1105                 do_stuff_to_one_msg();
1106         } else if (!strcasecmp(action, "move_msg")) {
1107                 move_msg();
1108         } else if (!strcasecmp(action, "userlist")) {
1109                 userlist();
1110         } else if (!strcasecmp(action, "showuser")) {
1111                 showuser();
1112         } else if (!strcasecmp(action, "display_page")) {
1113                 display_page();
1114         } else if (!strcasecmp(action, "page_user")) {
1115                 page_user();
1116         } else if (!strcasecmp(action, "chat")) {
1117                 do_chat();
1118         } else if (!strcasecmp(action, "display_private")) {
1119                 display_private("", 0);
1120         } else if (!strcasecmp(action, "goto_private")) {
1121                 goto_private();
1122         } else if (!strcasecmp(action, "zapped_list")) {
1123                 zapped_list();
1124         } else if (!strcasecmp(action, "display_zap")) {
1125                 display_zap();
1126         } else if (!strcasecmp(action, "zap")) {
1127                 zap();
1128         } else if (!strcasecmp(action, "display_entroom")) {
1129                 display_entroom();
1130         } else if (!strcasecmp(action, "entroom")) {
1131                 entroom();
1132         } else if (!strcasecmp(action, "display_editroom")) {
1133                 display_editroom();
1134         } else if (!strcasecmp(action, "netedit")) {
1135                 netedit();
1136         } else if (!strcasecmp(action, "editroom")) {
1137                 editroom();
1138         } else if (!strcasecmp(action, "display_whok")) {
1139                 display_whok();
1140         } else if (!strcasecmp(action, "display_editinfo")) {
1141                 display_edit("Room info", "EINF 0", "RINF", "/editinfo", 1);
1142         } else if (!strcasecmp(action, "editinfo")) {
1143                 save_edit("Room info", "EINF 1", 1);
1144         } else if (!strcasecmp(action, "display_editbio")) {
1145                 sprintf(buf, "RBIO %s", WC->wc_username);
1146                 display_edit("Your bio", "NOOP", buf, "editbio", 3);
1147         } else if (!strcasecmp(action, "editbio")) {
1148                 save_edit("Your bio", "EBIO", 0);
1149         } else if (!strcasecmp(action, "confirm_delete_room")) {
1150                 confirm_delete_room();
1151         } else if (!strcasecmp(action, "delete_room")) {
1152                 delete_room();
1153         } else if (!strcasecmp(action, "validate")) {
1154                 validate();
1155         } else if (!strcasecmp(action, "display_editpic")) {
1156                 display_graphics_upload("your photo",
1157                                         "UIMG 0|_userpic_",
1158                                         "/editpic");
1159         } else if (!strcasecmp(action, "editpic")) {
1160                 do_graphics_upload("UIMG 1|_userpic_");
1161         } else if (!strcasecmp(action, "display_editroompic")) {
1162                 display_graphics_upload("the graphic for this room",
1163                                         "UIMG 0|_roompic_",
1164                                         "/editroompic");
1165         } else if (!strcasecmp(action, "editroompic")) {
1166                 do_graphics_upload("UIMG 1|_roompic_");
1167         } else if (!strcasecmp(action, "delete_floor")) {
1168                 delete_floor();
1169         } else if (!strcasecmp(action, "rename_floor")) {
1170                 rename_floor();
1171         } else if (!strcasecmp(action, "create_floor")) {
1172                 create_floor();
1173         } else if (!strcasecmp(action, "display_editfloorpic")) {
1174                 sprintf(buf, "UIMG 0|_floorpic_|%s",
1175                         bstr("which_floor"));
1176                 display_graphics_upload("the graphic for this floor",
1177                                         buf,
1178                                         "/editfloorpic");
1179         } else if (!strcasecmp(action, "editfloorpic")) {
1180                 sprintf(buf, "UIMG 1|_floorpic_|%s",
1181                         bstr("which_floor"));
1182                 do_graphics_upload(buf);
1183         } else if (!strcasecmp(action, "display_reg")) {
1184                 display_reg(0);
1185         } else if (!strcasecmp(action, "display_changepw")) {
1186                 display_changepw();
1187         } else if (!strcasecmp(action, "changepw")) {
1188                 changepw();
1189         } else if (!strcasecmp(action, "display_edit_node")) {
1190                 display_edit_node();
1191         } else if (!strcasecmp(action, "edit_node")) {
1192                 edit_node();
1193         } else if (!strcasecmp(action, "display_netconf")) {
1194                 display_netconf();
1195         } else if (!strcasecmp(action, "display_confirm_delete_node")) {
1196                 display_confirm_delete_node();
1197         } else if (!strcasecmp(action, "delete_node")) {
1198                 delete_node();
1199         } else if (!strcasecmp(action, "display_add_node")) {
1200                 display_add_node();
1201         } else if (!strcasecmp(action, "add_node")) {
1202                 add_node();
1203         } else if (!strcasecmp(action, "terminate_session")) {
1204                 slrp_highest();
1205                 terminate_session();
1206         } else if (!strcasecmp(action, "edit_me")) {
1207                 edit_me();
1208         } else if (!strcasecmp(action, "display_siteconfig")) {
1209                 display_siteconfig();
1210         } else if (!strcasecmp(action, "chat_recv")) {
1211                 chat_recv();
1212         } else if (!strcasecmp(action, "chat_send")) {
1213                 chat_send();
1214         } else if (!strcasecmp(action, "page_popup")) {
1215                 page_popup();
1216         } else if (!strcasecmp(action, "siteconfig")) {
1217                 siteconfig();
1218         } else if (!strcasecmp(action, "display_generic")) {
1219                 display_generic();
1220         } else if (!strcasecmp(action, "do_generic")) {
1221                 do_generic();
1222         } else if (!strcasecmp(action, "display_menubar")) {
1223                 display_menubar(1);
1224         } else if (!strcasecmp(action, "output_mimepart")) {
1225                 output_mimepart();
1226         } else if (!strcasecmp(action, "edit_vcard")) {
1227                 edit_vcard();
1228         } else if (!strcasecmp(action, "submit_vcard")) {
1229                 submit_vcard();
1230         } else if (!strcasecmp(action, "select_user_to_edit")) {
1231                 select_user_to_edit(NULL, NULL);
1232         } else if (!strcasecmp(action, "display_edituser")) {
1233                 display_edituser(NULL, 0);
1234         } else if (!strcasecmp(action, "edituser")) {
1235                 edituser();
1236         } else if (!strcasecmp(action, "create_user")) {
1237                 create_user();
1238         } else if (!strcasecmp(action, "changeview")) {
1239                 change_view();
1240         } else if (!strcasecmp(action, "do_stuff_to_msgs")) {
1241                 do_stuff_to_msgs();
1242         } else if (!strcasecmp(action, "change_start_page")) {
1243                 change_start_page();
1244         } else if (!strcasecmp(action, "display_floorconfig")) {
1245                 display_floorconfig(NULL);
1246         } else if (!strcasecmp(action, "toggle_self_service")) {
1247                 toggle_self_service();
1248 #ifdef WEBCIT_WITH_CALENDAR_SERVICE
1249         } else if (!strcasecmp(action, "display_edit_task")) {
1250                 display_edit_task();
1251         } else if (!strcasecmp(action, "save_task")) {
1252                 save_task();
1253         } else if (!strcasecmp(action, "display_edit_event")) {
1254                 display_edit_event();
1255         } else if (!strcasecmp(action, "save_event")) {
1256                 save_event();
1257         } else if (!strcasecmp(action, "respond_to_request")) {
1258                 respond_to_request();
1259         } else if (!strcasecmp(action, "handle_rsvp")) {
1260                 handle_rsvp();
1261 #endif
1262         } else if (!strcasecmp(action, "summary")) {
1263                 summary();
1264         } else if (!strcasecmp(action, "iconbar")) {
1265                 do_iconbar();
1266         } else if (!strcasecmp(action, "display_customize_iconbar")) {
1267                 display_customize_iconbar();
1268         } else if (!strcasecmp(action, "commit_iconbar")) {
1269                 commit_iconbar();
1270         } else if (!strcasecmp(action, "set_room_policy")) {
1271                 set_room_policy();
1272         } else if (!strcasecmp(action, "display_inetconf")) {
1273                 display_inetconf();
1274         } else if (!strcasecmp(action, "save_inetconf")) {
1275                 save_inetconf();
1276         } else if (!strcasecmp(action, "diagnostics")) {
1277                 output_headers(1);
1278
1279                 wprintf("You're in session %d<HR>\n", WC->wc_session);
1280                 wprintf("Command: <BR><PRE>\n");
1281                 escputs(cmd);
1282                 wprintf("</PRE><HR>\n");
1283                 wprintf("Variables: <BR><PRE>\n");
1284                 dump_vars();
1285                 wprintf("</PRE><HR>\n");
1286                 wDumpContent(1);
1287         }
1288         /* When all else fais, display the main menu. */
1289         else {
1290                 display_main_menu();
1291         }
1292
1293 SKIP_ALL_THIS_CRAP:
1294         fflush(stdout);
1295         if (content != NULL) {
1296                 free(content);
1297                 content = NULL;
1298         }
1299         free_urls();
1300         if (WC->upload_length > 0) {
1301                 free(WC->upload);
1302                 WC->upload_length = 0;
1303         }
1304
1305 }