JSTL EL support for header?

[peter lin <pe...@labs.gte.com>]

I read through the JSTL spec and grepped "org.apache....lang.jstl" to
see if it has any calls to request.getHeader(string) and noticed JSTL EL
does not support request header.


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Re: JSTL EL support for header?

[peter lin <pe...@labs.gte.com>]

The closest thing I can think of to access request header values is
<c:out value="${request.headers["host"]}"/>, but [] are used to access
maps. Request.getHeaders() returns an Emueration, so it fails like it's
supposed to.

Thanks to shawn's fix yesterday to JSTL XML tags, i can use <x:out
select="$header:user-agent"/> to do browser detection. It would be nice
if JSTL EL also supports headers like parameters.

<c:out value="${header.user-agent}"/>

when I use the example above, I get "0" as the output. Is that a bug
maybe or not supported as specified. I'm using nightly 3-18.

thanks.


peter

peter lin wrote:
> 
> I read through the JSTL spec and grepped "org.apache....lang.jstl" to
> see if it has any calls to request.getHeader(string) and noticed JSTL EL
> does not support request header.
> 
> --
> To unsubscribe, e-mail:   <ma...@jakarta.apache.org>
> For additional commands, e-mail: <ma...@jakarta.apache.org>

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Re: JSTL EL support for header?

[Shawn Bayern <ba...@essentially.net>]

On Wed, 20 Mar 2002, peter lin wrote:

> I read through the JSTL spec and grepped "org.apache....lang.jstl" to
> see if it has any calls to request.getHeader(string) and noticed JSTL
> EL does not support request header.

It'll be added.  In general, things like headers might ideally be
retrieved as JavaBean-like properties of the PageContext.  But headers
aren't available this way, so they're going to be added as new top-level
implicit objects.

-- 
Shawn Bayern
Author, "JSP Standard Tag Library"  http://www.jstlbook.com
(coming this summer from Manning Publications)


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