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From Oleg Kalnichevski <ol...@apache.org>
Subject Re: getting the "entity" of a status 304 response
Date Tue, 07 Sep 2010 19:23:52 GMT
On Tue, 2010-09-07 at 18:20 +0200, Michel Onoff wrote:
> By specification, HTTP response 304 Not Modified has no entity.
> 
> However, getEntity() on the BasicHttpResponse still returns a non-null
> entity. Trying to getContent() and read() then blocks. The same happens
> if one tries to send the response with
> HttpServerConnection.sendResponseEntity(response).
> 
> Is this supposed to be correct behavior? In other words, must the
> programmer be aware of which responses might have an entity? Why can't
> he rely on the return value of getEntity()?
> 

Michel,

BasicHttpResponse does not have any protocol specific logic. It is
merely a bean with properties. It is the responsibility of the protocol
processor to assign an instance of HttpEntity to the response object if
a response content is expected.

I am fairly confident the standard HTTP protocol processors handle 304
Not Modified responses correctly

http://hc.apache.org/httpcomponents-core-4.0.1/httpcore/xref/org/apache/http/protocol/HttpRequestExecutor.html#290
http://hc.apache.org/httpcomponents-core-4.0.1/httpcore/xref/org/apache/http/protocol/HttpRequestExecutor.html#83

What is it exactly you are trying to do and what module (HttpCore,
HttpCore NIO, HttpClient) are you using?

Oleg



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