NSDictionary's hashcode is very bad ... you wouldn't want to use that for your etag.
ms On May 25, 2011, at 2:03 PM, Jean-Francois Veillette wrote: > > Le 2011-05-25 à 13:55, Pascal Robert a écrit : > >> 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? > > myEO.snapshotDictionary().hashCode() ? > That would be based on the attributes values only. > hmmm ... not sure how it would deal with relationship though (with regards to > faulting). > > >> 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. > > > jfv > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/webobjects-dev/mschrag%40pobox.com > > This email sent to msch...@pobox.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
