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74 lines
2.5 KiB
74 lines
2.5 KiB
<!--
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index.vnc - default HTML page for TightVNC Java viewer applet, to be
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used with Xvnc. On any file ending in .vnc, the HTTP server embedded in
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Xvnc will substitute the following variables when preceded by a dollar:
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USER, DESKTOP, DISPLAY, APPLETWIDTH, APPLETHEIGHT, WIDTH, HEIGHT, PORT,
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PARAMS. Use two dollar signs ($$) to get a dollar sign in the generated
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HTML page.
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NOTE: the $PARAMS variable is not supported by the standard VNC, so
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make sure you have TightVNC on the server side, if you're using this
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variable.
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-->
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<!--
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The idea behind using the signed applet in SignedVncViewer.jar for
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firewall proxies:
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Java socket applets and http proxies do not get along well.
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Java security allows the applet to connect back via a socket to the
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originating host, but the browser/plugin Proxy settings are not used for
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socket connections (only http and the like). So the socket connection
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fails in the proxy environment.
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The applet is not allowed to open a socket connection to the proxy (since
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that would let it connect to just about any host, e.g. CONNECT method).
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This is independent of SSL but of course fails for that socket connection
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as well. I.e. this is a problem for non-SSL VNC Viewers as well.
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Solution? Sign the applet and have the user click on "Yes" that they
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fully trust the applet. Then the applet can connect to any host via
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sockets, in particular the proxy. It next issues the request
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CONNECT host:port HTTP/1.1
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Host: host:port
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and if the proxy supports the CONNECT method we are finally connected to
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the VNC server.
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For SSL connections, SSL is layered on top of this socket. However note
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this scheme will work for non-SSL applet proxy tunnelling as well.
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It should be able to get non-SSL VNC connections to work via GET
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command but that has not been done yet.
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Note that some proxies only allow CONNECT to only these the ports 443
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(HTTPS) and 563 (SNEWS). So you would have to run the VNC server on
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those ports.
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SignedVncViewer.jar is just a signed version of VncViewer.jar
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The URL to use for this file: https://host:port/proxy.vnc
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Note VNCSERVERPORT, we assume $PARAMS will have the correct PORT setting
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(e.g. 563), not the one libvncserver puts in....
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-->
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<HTML>
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<TITLE>
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$USER's $DESKTOP desktop ($DISPLAY)
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</TITLE>
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<APPLET CODE=VncViewer.class ARCHIVE=SignedVncViewer.jar
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WIDTH=$APPLETWIDTH HEIGHT=$APPLETHEIGHT>
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<param name=VNCSERVERPORT value=$PORT>
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<param name="Open New Window" value=yes>
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$PARAMS
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</APPLET>
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<BR>
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<A href="http://www.karlrunge.com/x11vnc">x11vnc site</A>
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</HTML>
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