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From "Shapira, Yoav" <>
Subject RE: Logging filter (was RE: [next] What's next ?)
Date Thu, 02 Oct 2003 16:29:30 GMT


>--- "Shapira, Yoav" <> wrote:
>> 1. Convert AccessLogValve to be a servlet
>> specification 2.3 filter, i.e.
>That sounds wonderful and useful, but there are a few
>problems here.  Filters don't have access to all the
>information that is needed to make a log entry the way
>the AccessLogValve does it.  Content length, response
>code and content type variables may not be known when
>the filter is processing, and (last time I checked)
>there is no byte[] Response.getContentType() method.
>There is setContentType() but no getContentType().

That's unfortunate ;(

getContentType() is there, actually, in ServletResponse.  But not
getContentLength() nor getStatusCode().  I was planning the
AccessLogFilter just support the Common and Combined access log files
patterns, and I imagined all the required fields for those patterns are
part of standard interfaces.

In fact, why aren't there methods like getHeader(String name) and
getContentLength() in the ServletResponse interface?  Can someone
familiar with the Servlet Specification comment on this?

Yoav Shapira

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