Hashcode/ETag for EOs
Hashcode/ETag for EOs
- Subject: Hashcode/ETag for EOs
- From: Pascal Robert <email@hidden>
- Date: Wed, 25 May 2011 13:55:04 -0400
I'm trying to find a way to generate a HTTP ETag for EOs so that caching can be done for REST services. What I want to do is to have the same ETag value for each representation of the EO, so when one of the values change, the ETag value will also change, but if the EO have the same value, it will generate the same ETag as another request got.
Problem is: I don't know what to use. I tried with myEO.hashCode() but I did some tests and every time I fetch the EO, the hashcode is different even if the data didn't change. I'm thinking of doing a MD5 digest of part of the EO, but I was wondering if another way exist? I could use a "last modified" date and generate a MD5 of that too, but that date is a better option for the Last-Modified header.
--
Pascal Robert
email@hidden
WOWODC 2011 : July 1-2-3, Montreal. wowodc.com
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