Any idea how to handle eTags at client side? We are planning to use eTags with images in our application which are coming from the server.
For what is eTag please see this: http://en.wikipedia.org/wiki/HTTP_ETag
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Starting points for your study ...
NSMutableURLRequest
Here you can set eTag value for you request.
This request is usable with NSURLConnection.
NSURLConnectionDelegate
Delegate of your NSURLConnection has method ...
... where response in your case is
NSHTTPURLResponse.You should check response statusCode in another delegate's method ...
... status code 304 is received when remote object is not modified. If remote object is modified and eTag is supported, you can find it in
[response allHeaderFields].