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Dynamic content modification on download (for example dynamic watermarking)

Question asked by tomasp on Aug 5, 2014
Latest reply on Aug 7, 2014 by mitpatoliya
I need to develop dynamic modification of downloading document. It is similar to watermarking pdf document with downloader's user name.

This feature has to be "system-wide", for all types of downloading (http downloading, cmis, samba, printing, …).

I tried to bind behaviour to OnContentReadPolicy, but no success. Behaviour read content stream, made changes and wrote modified content back to content. But download running in read-only transaction, so the write failed. Also, this is not optimal method, because it changes original content stored on repository.

So how I can implement this feature?