Downloads & Safari Extension

I wrote an application that runs in the background and periodically scans my download folder and moves files to different folders based on their type. I want rewrite this application as a safari ex开发者_运维技巧tensions, but I didn't find a way to intercept downloads. All in all the ExtensionAPI seems to be very limited and seems to focus a lot on little eye-candy apps.

Is it possible to intercept and redirect downloads through the ExentsionAPI?

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No. You cannot access the hard drive through the Extension API.