DefaultHttpHeaders throws NPE trying to generate ETag when model is null
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Key: WW-2512
URL: https://issues.apache.org/struts/browse/WW-2512
Project: Struts 2
Issue Type: Bug
Components: Plugin - REST
Affects Versions: 2.1.1
Reporter: Jeromy Evans
Priority: Minor
Fix For: 2.1.1
DefaultHttpHeaders attempts to generate an ETag using the hashcode of the model
if not disabled and not explicitly specified. This throws an NPE if the model
is null, which may be the case for some create operations. Rather than mandate
that ETag must be explicitly disabled, just don't generate one if it's not
relevant.
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