1<!--
2     index.vnc - default HTML page for TightVNC Java viewer applet, to be
3     used with Xvnc. On any file ending in .vnc, the HTTP server embedded in
4     Xvnc will substitute the following variables when preceded by a dollar:
5     USER, DESKTOP, DISPLAY, APPLETWIDTH, APPLETHEIGHT, WIDTH, HEIGHT, PORT,
6     PARAMS. Use two dollar signs ($$) to get a dollar sign in the generated
7     HTML page.
8
9     NOTE: the $PARAMS variable is not supported by the standard VNC, so
10     make sure you have TightVNC on the server side, if you're using this
11     variable.
12-->
13
14<!--
15The idea behind using the signed applet in SignedVncViewer.jar for
16firewall proxies:
17
18Java socket applets and http proxies do not get along well.
19
20Java security allows the applet to connect back via a socket to the
21originating host, but the browser/plugin Proxy settings are not used for
22socket connections (only http and the like).  So the socket connection
23fails in the proxy environment.
24
25The applet is not allowed to open a socket connection to the proxy (since
26that would let it connect to just about any host, e.g. CONNECT method).
27
28This is indpendent of SSL but of course fails for that socket connection
29as well.  I.e. this is a problem for non-SSL VNC Viewers as well.
30
31Solution?  Sign the applet and have the user click on "Yes" that they
32fully trust the applet.  Then the applet can connect to any host via
33sockets, in particular the proxy.  It next issues the request
34
35	CONNECT host:port HTTP/1.1
36	Host: host:port
37
38and if the proxy supports the CONNECT method we are finally connected to
39the VNC server.
40
41For SSL connections, SSL is layered on top of this socket.  However note
42this scheme will work for non-SSL applet proxy tunnelling as well.
43
44It should be able to get non-SSL VNC connections to work via GET
45command but that has not been done yet.
46
47Note that some proxies only allow CONNECT to only these the ports 443
48(HTTPS) and 563 (SNEWS).  So you would have to run the VNC server on
49those ports.
50
51SignedVncViewer.jar is just a signed version of VncViewer.jar
52
53The URL to use for this file:  https://host:port/proxy.vnc
54
55Note VNCSERVERPORT, we assume $PARAMS will have the correct PORT setting
56(e.g. 563), not the one libvncserver puts in....
57
58-->
59
60
61<HTML>
62<TITLE>
63$USER's $DESKTOP desktop ($DISPLAY)
64</TITLE>
65<APPLET CODE=VncViewer.class ARCHIVE=SignedVncViewer.jar
66        WIDTH=$APPLETWIDTH HEIGHT=$APPLETHEIGHT>
67<param name=VNCSERVERPORT value=$PORT>
68<param name="Open New Window" value=yes>
69$PARAMS
70</APPLET>
71<BR>
72<A href="http://www.karlrunge.com/x11vnc">x11vnc site</A>
73</HTML>
74