Generating preview for the web

Good morning,
I was wondering if exist a way to create dynamically (via PHP or other language) a preview of a dwg file that can be used on the web.
For example:
1. Mr. X uploads a DWG file to a web server. 2. A script on the server is called to create a GIF preview. 3. Mr. Y can see a GIF preview of the file on a web page.
Hope you understand my english.
-- Napolux
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