dear community, I would like to automatically add a sha256 filehash to a Document field after a binary file is posted to a ExtractingRequestHandler. First i thought, that the ExtractingRequestHandler has such a feature, but so far i did not find a configuration. It was mentioned that I should implement my own Update Request Processor to calculate the hash and add it to a field. The SignatureUpdateProcessor seemed to be an out-of-the-box option, but it only supports md5 and also does not access the raw binary stream.
The important thing is that i do need the binary stream of the uploaded file to calculate a correct hashvalue (e.g. md5, sha256,..) Is it possible to also arrange this with a ScriptUpdateProcessor and javascript?. thanks in advance for any help Tom
