[galaxy-dev] Upload file : auto-detect based on file extension ?

Hi, We are using a proprietary file format in some of our tools. I successfully added a new data type, but what I would like to do is to use the auto-detect when uploading the file, just based on the extension of the file. My guess is I have to override the sniff() in the datatype class, and test for the extension ? Somethinkg like that : if file.endswith('.extension123'): ... But how do I get the original filename when it was uploaded ? Thanks, -- David