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.
23 #include "mime_parser.h"
26 char wc_username[256];
27 char wc_password[256];
28 char wc_roomname[256];
29 int TransactionCount = 0;
33 char *ExpressMessages = NULL;
37 /* This variable is set to 1 if the room banner and menubar have been
38 * displayed, and we need to close the <TABLE> tags.
42 struct webcontent *wlist = NULL;
43 struct webcontent *wlast = NULL;
45 struct urlcontent *urlstrings = NULL;
47 static const char *defaulthost = DEFAULT_HOST;
48 static const char *defaultport = DEFAULT_PORT;
50 int upload_length = 0;
54 void unescape_input(char *buf)
59 while ((isspace(buf[strlen(buf) - 1])) && (strlen(buf) > 0))
60 buf[strlen(buf) - 1] = 0;
62 for (a = 0; a < strlen(buf); ++a) {
69 sscanf(hex, "%02x", &b);
71 strcpy(&buf[a + 1], &buf[a + 3]);
78 void addurls(char *url)
86 while (strlen(up) > 0) {
88 /* locate the = sign */
89 strncpy(buf, up, 255);
91 for (a = 255; a >= 0; --a)
98 u = (struct urlcontent *) malloc(sizeof(struct urlcontent));
101 strcpy(u->url_key, buf);
103 /* now chop that part off */
104 for (a = 0; a <= b; ++a)
107 /* locate the & sign */
110 for (a = 0; a < strlen(up); ++a) {
111 if (!strncmp(ptr, "&", 1)) {
118 for (a = 0; a < b; ++a)
122 u->url_data = malloc(strlen(up) + 1);
123 strcpy(u->url_data, up);
125 unescape_input(u->url_data);
133 struct urlcontent *u;
135 while (urlstrings != NULL) {
136 free(urlstrings->url_data);
137 u = urlstrings->next;
144 * Diagnostic function to display the contents of all variables
148 struct urlcontent *u;
150 for (u = urlstrings; u != NULL; u = u->next) {
151 wprintf("%38s = %s\n", u->url_key, u->url_data);
155 char *bstr(char *key)
157 struct urlcontent *u;
159 for (u = urlstrings; u != NULL; u = u->next) {
160 if (!strcasecmp(u->url_key, key))
161 return (u->url_data);
167 void wprintf(const char *format,...)
170 struct webcontent *wptr;
172 wptr = (struct webcontent *) malloc(sizeof(struct webcontent));
182 va_start(arg_ptr, format);
183 vsprintf(wptr->w_data, format, arg_ptr);
187 int wContentLength(void)
189 struct webcontent *wptr;
192 for (wptr = wlist; wptr != NULL; wptr = wptr->next) {
193 len = len + strlen(wptr->w_data);
200 * wDumpContent() takes all the stuff that's been queued up using
201 * the wprintf() and escputs() functions, and sends it out to the browser.
202 * By queuing instead of transmitting as it's generated, we're able to
203 * calculate a Content-length: header.
205 * print_standard_html_footer should be set to 0 to transmit only, 1 to
206 * append the main menu and closing tags, or 2 to
207 * append the closing tags only.
209 void wDumpContent(int print_standard_html_footer)
211 struct webcontent *wptr;
214 wprintf("<CENTER><FONT SIZE=-1>"
215 "<A HREF=\"/ungoto\">"
216 "<IMG SRC=\"/static/bleft.gif\" BORDER=0>"
217 "Ungoto</A> ");
218 wprintf("<A HREF=\"#TheTop\">"
219 "<IMG SRC=\"/static/bup.gif\" BORDER=0>"
220 "Top of page</A> ");
221 wprintf("<A HREF=\"/display_enter\">"
222 "<IMG SRC=\"/static/enter.gif\" BORDER=0>"
223 "Enter a message</A> ");
224 wprintf("<A HREF=\"/gotonext\">"
226 "<IMG SRC=\"/static/bright.gif\" BORDER=0></A>"
228 "</TD></TR></TABLE></TABLE>\n");
232 if (print_standard_html_footer) {
233 if (print_standard_html_footer != 2) {
236 wprintf("</BODY></HTML>\n");
238 printf("Content-type: text/html\n");
239 printf("Content-length: %d\n", wContentLength());
242 while (wlist != NULL) {
243 fwrite(wlist->w_data, strlen(wlist->w_data), 1, stdout);
252 void escputs1(char *strbuf, int nbsp)
256 for (a = 0; a < strlen(strbuf); ++a) {
257 if (strbuf[a] == '<')
259 else if (strbuf[a] == '>')
261 else if (strbuf[a] == '&')
263 else if (strbuf[a] == '\"')
265 else if (strbuf[a] == '\'')
267 else if (strbuf[a] == LB)
269 else if (strbuf[a] == RB)
271 else if (strbuf[a] == QU)
273 else if ((strbuf[a] == 32) && (nbsp == 1)) {
276 wprintf("%c", strbuf[a]);
281 void escputs(char *strbuf)
288 char *urlesc(char *strbuf)
291 char *ec = " #&;`'|*?-~<>^()[]{}$\\";
292 static char outbuf[512];
296 for (a = 0; a < strlen(strbuf); ++a) {
298 for (b = 0; b < strlen(ec); ++b) {
299 if (strbuf[a] == ec[b])
304 sprintf(&outbuf[b], "%%%02x", strbuf[a]);
306 sprintf(&outbuf[b], "%c", strbuf[a]);
311 void urlescputs(char *strbuf)
313 wprintf("%s", urlesc(strbuf));
320 * Get a line of text from the webserver (which originally came from the
321 * user's browser), checking for sanity etc.
323 char *getz(char *buf)
329 /* If fgets() fails, it's because the webserver crashed, so kill off
332 if (fgets(buf, 256, stdin) == NULL) {
334 fprintf(stderr, "webcit: exit code %d (%s)\n",
339 /* Otherwise, strip out nonprintables and resume our happy day.
342 while ((strlen(buf) > 0) && (!isprint(buf[strlen(buf) - 1])))
343 buf[strlen(buf) - 1] = 0;
351 * Output all that important stuff that the browser will want to see
353 * print_standard_html_head values:
354 * 0 = Nothing. Do not display any leading HTTP or HTML.
355 * 1 = HTTP headers plus the "fake frames" found in most windows.
356 * 2 = HTTP headers required to terminate the session (unset cookies)
357 * 3 = HTTP headers only.
359 void output_headers(int print_standard_html_head)
362 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
365 printf("Server: %s\n", SERVER);
366 printf("Connection: close\n");
368 if (print_standard_html_head > 0) {
369 printf("Pragma: no-cache\n");
370 printf("Cache-Control: no-store\n");
372 stuff_to_cookie(cookie, wc_session, wc_username,
373 wc_password, wc_roomname);
374 if (print_standard_html_head == 2) {
375 printf("X-WebCit-Session: close\n");
376 printf("Set-cookie: webcit=%s\n", unset);
378 printf("Set-cookie: webcit=%s\n", cookie);
381 if (print_standard_html_head > 0) {
382 wprintf("<HTML><HEAD><TITLE>");
383 escputs(serv_info.serv_humannode);
384 wprintf("<META HTTP-EQUIV=\"Pragma\" CONTENT=\"no-cache\">\n");
385 wprintf("</TITLE></HEAD>\n");
386 if (ExpressMessages != NULL) {
387 wprintf("<SCRIPT language=\"javascript\">\n");
388 wprintf("function ExpressMessage() {\n");
389 wprintf(" alert(\"");
390 escputs(ExpressMessages);
392 wprintf(" }\n </SCRIPT>\n");
397 /* JavaScript key-based navigation would go here if it
402 if (ExpressMessages != NULL) {
403 wprintf("onload=\"ExpressMessage()\" ");
404 free(ExpressMessages);
405 ExpressMessages = NULL;
407 wprintf("BACKGROUND=\"/image&name=background\" TEXT=\"#000000\" LINK=\"#004400\">\n");
410 if (print_standard_html_head == 1) {
411 wprintf("<A NAME=\"TheTop\"></A>"
412 "<TABLE border=0 width=100%>"
413 "<TR VALIGN=TOP><TD>");
417 wprintf("</TD><TD VALIGN=TOP>"
418 "<TABLE border=0 width=100%><TR VALIGN=TOP>"
421 embed_room_banner(NULL);
423 wprintf("</TD></TR><TR VALIGN=TOP><TD>\n");
432 void ExpressMessageCat(char *buf) {
433 if (ExpressMessages == NULL) {
434 ExpressMessages = malloc(strlen(buf) + 4);
435 strcpy(ExpressMessages, "");
437 ExpressMessages = realloc(ExpressMessages,
438 (strlen(ExpressMessages) + strlen(buf) + 4));
440 strcat(ExpressMessages, buf);
441 strcat(ExpressMessages, "\\n");
445 void check_for_express_messages()
452 while (serv_gets(buf), strcmp(buf, "000")) {
453 ExpressMessageCat(buf);
461 void output_static(char *what)
468 sprintf(buf, "static/%s", what);
469 fp = fopen(buf, "rb");
471 printf("HTTP/1.0 404 %s\n", strerror(errno));
473 printf("Content-Type: text/plain\n");
474 sprintf(buf, "%s: %s\n", what, strerror(errno));
475 printf("Content-length: %d\n", strlen(buf));
477 fwrite(buf, strlen(buf), 1, stdout);
479 printf("HTTP/1.0 200 OK\n");
482 if (!strncasecmp(&what[strlen(what) - 4], ".gif", 4))
483 printf("Content-type: image/gif\n");
484 else if (!strncasecmp(&what[strlen(what) - 4], ".txt", 4))
485 printf("Content-type: text/plain\n");
486 else if (!strncasecmp(&what[strlen(what) - 4], ".jpg", 4))
487 printf("Content-type: image/jpeg\n");
488 else if (!strncasecmp(&what[strlen(what) - 5], ".html", 5))
489 printf("Content-type: text/html\n");
491 printf("Content-type: application/octet-stream\n");
493 fstat(fileno(fp), &statbuf);
494 bytes = statbuf.st_size;
495 printf("Content-length: %ld\n", (long) bytes);
498 putc(getc(fp), stdout);
511 off_t accomplished = 0L;
514 serv_printf("OIMG %s|%s", bstr("name"), bstr("parm"));
517 bytes = extract_long(&buf[4], 0);
518 printf("HTTP/1.0 200 OK\n");
520 printf("Content-type: image/gif\n");
521 printf("Content-length: %ld\n", (long) bytes);
524 while (bytes > (off_t) 0) {
525 thisblock = (off_t) sizeof(xferbuf);
526 if (thisblock > bytes)
528 serv_printf("READ %ld|%ld", accomplished, thisblock);
531 thisblock = extract_long(&buf[4], 0);
532 serv_read(xferbuf, (int) thisblock);
533 fwrite(xferbuf, thisblock, 1, stdout);
534 bytes = bytes - thisblock;
535 accomplished = accomplished + thisblock;
541 printf("HTTP/1.0 404 %s\n", strerror(errno));
543 printf("Content-Type: text/plain\n");
544 sprintf(buf, "Error retrieving image\n");
545 printf("Content-length: %d\n", strlen(buf));
547 fwrite(buf, strlen(buf), 1, stdout);
554 * Convenience functions to display a page containing only a string
556 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
558 printf("HTTP/1.0 200 OK\n");
560 wprintf("<TABLE WIDTH=100% BORDER=0 BGCOLOR=%s><TR><TD>", titlebarcolor);
561 wprintf("<FONT SIZE=+1 COLOR=\"FFFFFF\"");
562 wprintf("<B>%s</B>\n", titlebarmsg);
563 wprintf("</FONT></TD></TR></TABLE><BR>\n");
564 escputs(messagetext);
571 void display_error(char *errormessage)
573 convenience_page("770000", "Error", errormessage);
576 void display_success(char *successmessage)
578 convenience_page("007700", "OK", successmessage);
583 void extract_action(char *actbuf, char *cmdbuf)
587 strcpy(actbuf, cmdbuf);
588 if (!strncasecmp(actbuf, "GET /", 5))
589 strcpy(actbuf, &actbuf[5]);
590 if (!strncasecmp(actbuf, "PUT /", 5))
591 strcpy(actbuf, &actbuf[5]);
592 if (!strncasecmp(actbuf, "POST /", 6))
593 strcpy(actbuf, &actbuf[6]);
595 for (i = 0; i < strlen(actbuf); ++i) {
596 if (actbuf[i] == ' ') {
600 if (actbuf[i] == '/') {
604 if (actbuf[i] == '?') {
608 if (actbuf[i] == '&') {
616 void upload_handler(char *name, char *filename, char *encoding,
617 void *content, char *cbtype, size_t length)
620 fprintf(stderr, "UPLOAD HANDLER CALLED\n");
621 fprintf(stderr, " name = %s\n", name);
622 fprintf(stderr, "filename = %s\n", filename);
623 fprintf(stderr, "encoding = %s\n", encoding);
624 fprintf(stderr, " type = %s\n", cbtype);
625 fprintf(stderr, " length = %d\n", length);
627 if (strlen(name) > 0) {
628 upload = malloc(length);
629 if (upload != NULL) {
630 upload_length = length;
631 memcpy(upload, content, length);
637 void session_loop(char *browser_host, char *user_agent)
643 int ContentLength = 0;
644 char ContentType[512];
647 /* We stuff these with the values coming from the client cookies,
648 * so we can use them to reconnect a timed out session if we have to.
652 char c_username[256];
653 char c_password[256];
654 char c_roomname[256];
657 strcpy(c_host, defaulthost);
658 strcpy(c_port, defaultport);
659 strcpy(c_username, "");
660 strcpy(c_password, "");
661 strcpy(c_roomname, "");
666 if (getz(cmd) == NULL)
668 extract_action(action, cmd);
671 if (getz(buf) == NULL)
674 if (!strncasecmp(buf, "Cookie: webcit=", 15)) {
675 strcpy(cookie, &buf[15]);
676 cookie_to_stuff(cookie, NULL,
677 c_username, c_password, c_roomname);
679 if (!strncasecmp(buf, "Content-length: ", 16)) {
680 ContentLength = atoi(&buf[16]);
682 if (!strncasecmp(buf, "Content-type: ", 14)) {
683 strcpy(ContentType, &buf[14]);
685 } while (strlen(buf) > 0);
689 if (ContentLength > 0) {
690 content = malloc(ContentLength + 1);
691 fread(content, ContentLength, 1, stdin);
693 content[ContentLength] = 0;
695 if (!strncasecmp(ContentType,
696 "application/x-www-form-urlencoded", 33)) {
698 } else if (!strncasecmp(ContentType, "multipart", 9)) {
699 mime_parser(content, ContentLength, ContentType,
706 /* If there are variables in the URL, we must grab them now */
707 for (a = 0; a < strlen(cmd); ++a)
708 if ((cmd[a] == '?') || (cmd[a] == '&')) {
709 for (b = a; b < strlen(cmd); ++b)
712 addurls(&cmd[a + 1]);
716 * If we're not connected to a Citadel server, try to hook up the
717 * connection now. Preference is given to the host and port specified
718 * by browser cookies, if cookies have been supplied.
721 if (strlen(bstr("host")) > 0)
722 strcpy(c_host, bstr("host"));
723 if (strlen(bstr("port")) > 0)
724 strcpy(c_port, bstr("port"));
725 serv_sock = connectsock(c_host, c_port, "tcp");
731 serv_gets(buf); /* get the server welcome message */
732 get_serv_info(browser_host, user_agent);
734 check_for_express_messages();
737 * If we're not logged in, but we have username and password cookies
738 * supplied by the browser, try using them to log in.
740 if ((!logged_in) && (strlen(c_username) > 0) && (strlen(c_password) > 0)) {
741 serv_printf("USER %s", c_username);
744 serv_printf("PASS %s", c_password);
747 become_logged_in(c_username, c_password, buf);
752 * If we don't have a current room, but a cookie specifying the
753 * current room is supplied, make an effort to go there.
755 if ((strlen(wc_roomname) == 0) && (strlen(c_roomname) > 0)) {
756 serv_printf("GOTO %s", c_roomname);
759 strcpy(wc_roomname, c_roomname);
762 if (!strcasecmp(action, "static")) {
763 strcpy(buf, &cmd[12]);
764 for (a = 0; a < strlen(buf); ++a)
768 } else if (!strcasecmp(action, "image")) {
770 } else if ((!logged_in) && (!strcasecmp(action, "login"))) {
772 } else if (!logged_in) {
775 /* Various commands... */
777 else if (!strcasecmp(action, "do_welcome")) {
779 } else if (!strcasecmp(action, "display_main_menu")) {
781 } else if (!strcasecmp(action, "advanced")) {
782 display_advanced_menu();
783 } else if (!strcasecmp(action, "whobbs")) {
785 } else if (!strcasecmp(action, "knrooms")) {
786 list_all_rooms_by_floor();
787 } else if (!strcasecmp(action, "gotonext")) {
790 } else if (!strcasecmp(action, "skip")) {
792 } else if (!strcasecmp(action, "ungoto")) {
794 } else if (!strcasecmp(action, "dotgoto")) {
796 smart_goto(bstr("room"));
797 } else if (!strcasecmp(action, "termquit")) {
799 } else if (!strcasecmp(action, "readnew")) {
801 } else if (!strcasecmp(action, "readold")) {
803 } else if (!strcasecmp(action, "readfwd")) {
805 } else if (!strcasecmp(action, "display_enter")) {
807 } else if (!strcasecmp(action, "post")) {
809 } else if (!strcasecmp(action, "confirm_delete_msg")) {
810 confirm_delete_msg();
811 } else if (!strcasecmp(action, "delete_msg")) {
813 } else if (!strcasecmp(action, "confirm_move_msg")) {
815 } else if (!strcasecmp(action, "move_msg")) {
817 } else if (!strcasecmp(action, "userlist")) {
819 } else if (!strcasecmp(action, "showuser")) {
821 } else if (!strcasecmp(action, "display_page")) {
823 } else if (!strcasecmp(action, "page_user")) {
825 } else if (!strcasecmp(action, "chat")) {
827 } else if (!strcasecmp(action, "display_private")) {
828 display_private("", 0);
829 } else if (!strcasecmp(action, "goto_private")) {
831 } else if (!strcasecmp(action, "zapped_list")) {
833 } else if (!strcasecmp(action, "display_zap")) {
835 } else if (!strcasecmp(action, "zap")) {
837 } else if (!strcasecmp(action, "display_entroom")) {
839 } else if (!strcasecmp(action, "entroom")) {
841 } else if (!strcasecmp(action, "display_editroom")) {
843 } else if (!strcasecmp(action, "editroom")) {
845 } else if (!strcasecmp(action, "display_editinfo")) {
846 display_edit("Room info", "EINF 0", "RINF", "/editinfo");
847 } else if (!strcasecmp(action, "editinfo")) {
848 save_edit("Room info", "EINF 1", 1);
849 } else if (!strcasecmp(action, "display_editbio")) {
850 sprintf(buf, "RBIO %s", wc_username);
851 display_edit("Your bio", "NOOP", buf, "editbio");
852 } else if (!strcasecmp(action, "editbio")) {
853 save_edit("Your bio", "EBIO", 0);
854 } else if (!strcasecmp(action, "confirm_delete_room")) {
855 confirm_delete_room();
856 } else if (!strcasecmp(action, "delete_room")) {
858 } else if (!strcasecmp(action, "validate")) {
860 } else if (!strcasecmp(action, "display_editpic")) {
861 display_graphics_upload("your photo",
864 } else if (!strcasecmp(action, "editpic")) {
865 do_graphics_upload("UIMG 1|_userpic_");
866 } else if (!strcasecmp(action, "display_editroompic")) {
867 display_graphics_upload("the graphic for this room",
870 } else if (!strcasecmp(action, "editroompic")) {
871 do_graphics_upload("UIMG 1|_roompic_");
872 } else if (!strcasecmp(action, "select_floor_to_edit_pic")) {
873 select_floor_to_edit_pic();
874 } else if (!strcasecmp(action, "display_editfloorpic")) {
875 sprintf(buf, "UIMG 0|_floorpic_|%s",
876 bstr("which_floor"));
877 display_graphics_upload("the graphic for this floor",
880 } else if (!strcasecmp(action, "editfloorpic")) {
881 sprintf(buf, "UIMG 1|_floorpic_|%s",
882 bstr("which_floor"));
883 do_graphics_upload(buf);
884 } else if (!strcasecmp(action, "display_reg")) {
886 } else if (!strcasecmp(action, "register")) {
888 } else if (!strcasecmp(action, "display_changepw")) {
890 } else if (!strcasecmp(action, "changepw")) {
892 } else if (!strcasecmp(action, "display_edit_node")) {
894 } else if (!strcasecmp(action, "display_netconf")) {
896 } else if (!strcasecmp(action, "display_confirm_unshare")) {
897 display_confirm_unshare();
898 } else if (!strcasecmp(action, "display_confirm_delete_node")) {
899 display_confirm_delete_node();
900 } else if (!strcasecmp(action, "delete_node")) {
902 } else if (!strcasecmp(action, "unshare")) {
904 } else if (!strcasecmp(action, "display_add_node")) {
906 } else if (!strcasecmp(action, "add_node")) {
908 } else if (!strcasecmp(action, "display_share")) {
910 } else if (!strcasecmp(action, "share")) {
912 } else if (!strcasecmp(action, "terminate_session")) {
915 } else if (!strcasecmp(action, "edit_me")) {
917 } else if (!strcasecmp(action, "display_siteconfig")) {
918 display_siteconfig();
919 } else if (!strcasecmp(action, "siteconfig")) {
921 } else if (!strcasecmp(action, "display_generic")) {
923 } else if (!strcasecmp(action, "do_generic")) {
925 } else if (!strcasecmp(action, "display_menubar")) {
927 } else if (!strcasecmp(action, "diagnostics")) {
928 printf("HTTP/1.0 200 OK\n");
931 wprintf("TransactionCount is %d<BR>\n", TransactionCount);
932 wprintf("You're in session %d<HR>\n", wc_session);
933 wprintf("Command: <BR><PRE>\n");
935 wprintf("</PRE><HR>\n");
936 wprintf("Variables: <BR><PRE>\n");
938 wprintf("</PRE><HR>\n");
941 /* When all else fais, display the main menu. */
947 if (content != NULL) {
952 if (upload_length > 0) {
958 int main(int argc, char *argv[])
966 "webcit: usage error (argc must be 6, not %d)\n",
971 wc_session = atoi(argv[1]);
972 defaulthost = argv[2];
973 defaultport = argv[3];
975 strcpy(wc_username, "");
976 strcpy(wc_password, "");
977 strcpy(wc_roomname, "");
979 /* Clear out serv_info and temporarily set the value of serv_humannode
980 * to a default value, because it'll be used in HTML page titles
982 memset(&serv_info, 0, sizeof(serv_info));
983 strcpy(serv_info.serv_humannode, "WebCit");
985 strcpy(browser, argv[5]);
986 bd = browser_braindamage_check(browser);
989 session_loop(argv[4], browser);