Hi to all,


i am a newbie in Google Web Toolkit and Google App Engine Technology so i 
need your help based on blobs. I am developing a web application for a 
company which needs to upload some files and serve them to their customers. 
The problem is that when someone uploads an item to the blobstore a url is 
created and whoever has that link can download/view the file but the 
specifications are the file to be downloaded to the user who have paid for 
that. Of course the user should be logged in before. So, how can i have some 
restrictions to the blob items and make them private to the prepaid 
customers?

Thanks in advance,

 Stefanos Antaris

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