I am getting input stream of the uploaded file in my application and I need to fetch the metadata of this file and process it. Is there anyway to get the metadata from Input stream, using java?
Thanks.
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3have you checked http://stackoverflow.com/questions/10824027/get-the-metadata-of-a-file? Not sure however whether this applies to streams as well... – Ueli Hofstetter Mar 31 '15 at 06:16
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There's not a lot of metadata that comes with an uploaded file – Maurice Perry Mar 31 '15 at 06:22
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1You can't get metadata from an InputStream; you need to know the filename. As for uploaded files, @MauricePerry is right. – Aasmund Eldhuset Mar 31 '15 at 06:22
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BTW, are you talking about HTTP uploads? – Maurice Perry Mar 31 '15 at 06:23
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@MauricePerry yes, this is a HTTP upload, done on client. – Manideep Reddy Mar 31 '15 at 06:46
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You can't get filesystem-level metadata (what you see when you right-click on a file in Explorer and select Properties) from an InputStream; you need to know the filename. As for files being uploaded in an HTTP POST request, Maurice Perry's comment is right (it's impossible to get the filesystem-level metadata, as the client doesn't send them).
However, if you are talking about e.g. Office documents, you can get the metadata because they are contained in the file data itself, but you'd need to use a library that can read such files. For Microsoft Office, check out Apache POI.
Aasmund Eldhuset
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