Commit 1626e0f8 authored by Joel Martin's avatar Joel Martin

Update README.md and TODO.

parent 07287cfd
......@@ -5,28 +5,38 @@ VNC HTML5 Client
Description
-----------
An VNC client implemented using HTML5, specifically Canvas and Web Sockets.
An VNC client implemented using HTML5, specifically Canvas and
WebSocket.
For browsers that do not have builtin WebSocket support, the project
includes web-socket-js, a WebSocket emulator using Adobe Flash
(http://github.com/gimite/web-socket-js).
Requirements
------------
* A browser that supports Web Sockets (mostly Chrome as of Apr 6, 2010)
and Canvas (most browsers)
Until there is VNC server support for WebSocket connections, you need
to use a WebSocket to TCP socket proxy. There is a python proxy
included ('wsproxy').
* Until VNC server support web sockets, you need to use a Web Sockets to
normal socket proxy. There are a couple reasons for this:
There a few reasons why a proxy is required:
1. Web Sockets is not a pure socket protocol. There is an initial HTTP
like handshake to allow easy hand-off by web servers and allow some
origin policy exchange. Also, each Web Sockets frame begins with
0 ('\x00') and ends with 255 ('\xff').
1. WebSocket is not a pure socket protocol. There is an initial HTTP
like handshake to allow easy hand-off by web servers and allow
some origin policy exchange. Also, each WebSocket frame begins
with 0 ('\x00') and ends with 255 ('\xff').
2. Javascript itself does not have the ability to handle pure byte
strings (Unicode encoding messes with it) even though you can read
them with Web Sockets. The python proxy base64 encodes the data so
that the Javascript client can base64 decode the data into an array.
strings (Unicode encoding messes with it) even though you can
read them with WebSocket. The python proxy encodes the data so
that the Javascript client can base64 decode the data into an
array. The client requests this encoding
3. When using the web-socket-js as a fallback, WebSocket 'onmessage'
events may arrive out of order. In order to compensate for this
the client asks the proxy (using the initial query string) to add
sequence numbers to each packet.
Usage
......@@ -34,7 +44,7 @@ Usage
* run a VNC server.
`Xvnc :1`
`vncserver :1`
* run the python proxy:
......@@ -52,7 +62,7 @@ Usage
* Point your web browser at http://localhost:8080/vnc.html
(or whatever port you used above to run the web server).
* Provide the host and port where the proxy is running and the password
that the vnc server is using (if any).
* Provide the host and port where the proxy is running and the
password that the vnc server is using (if any). Hit the Connect
button and enjoy!
- Make packet sequence number optional based on WebSockets 'path'.
- Add WSS/https/SSL support to page and wsproxy.py
- Make C version of wsproxy.py
- Implement UI option for shared.
- Implement UI option for VNC shared mode.
- Upgrade to protocol 3.8
- implement ZRLE encoding
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