CAD web implementation

Hi, We have some CAD files in this formats: CADKEY/Key Creator, IGES, STEP, STL, Solidworks, Solid Edge, Proe/Wildfire, Catia, Ideas, Unigraphics We're looking for a solution to: Via web, display a dialog box to select a file. Then submit button, and script will return an specified data from the file (in a simple html page is ok). We can use an ActiveX that support these formats (if you know anyone) or we can try to develop a soft to read at least 1 of these formats structure. Thanks C