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From "Francois-Xavier Bonnet (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HTTPCLIENT-1274) NullPointerException on 304 Not Modified response
Date Wed, 12 Dec 2012 16:35:21 GMT
Francois-Xavier Bonnet created HTTPCLIENT-1274:
--------------------------------------------------

             Summary: NullPointerException on 304 Not Modified response
                 Key: HTTPCLIENT-1274
                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1274
             Project: HttpComponents HttpClient
          Issue Type: Bug
          Components: Cache
    Affects Versions: Snapshot
            Reporter: Francois-Xavier Bonnet
            Priority: Minor
         Attachments: TestCachingExec.patch.txt

When sending a conditional request (If-None-Match for example) and the backend responds with
a 304 Not Modified, the response contains an HttpEntity but you get a NullPointerException
whenever to try to call one of the methods :
- org.apache.http.HttpEntity.getContent()
- org.apache.http.HttpEntity.writeTo(OutputStream)

I would expect getEntity() to return null if there is no entity in the response.

As a workaround I can test on the contentLength before calling these methods and call EntityUtils.consume(entity)
to get sure that the connection is released but this makes things more complicated.

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