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