Howdy,That's what HttpServletResponseWrapper is for. Simply have your logging filter wrap the response (on the way in) with a wrapper class that adds the necessary getters, and overrides the setters to store what you need where the getters can get to it. Skeleton implementation for just the content length:
--- "Shapira, Yoav" <[EMAIL PROTECTED]> wrote:
1. Convert AccessLogValve to be a servletThat sounds wonderful and useful, but there are a few
specification 2.3 filter, i.e.
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?
public class MyResponseWrapper implements HttpServletResponseWrapper {
...
// Local variable in which to cache the content length
private int saveContentLength; // The standard response method
public void setContentLength(int contentLength) {
saveContentLength = contentLength;
super.setContentLength(contentLength);
} // Added method in my wrapper class
public int getContentLength() { return saveContentLength; }}
Yoav ShapiraCraig
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