Thanks for you help Craig. I think the <meta> tag looks the cleanest way and
I'll use that.
Regards
Jim.
----- Original Message -----
From: "Craig McClanahan" <[EMAIL PROTECTED]>
To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
Sent: Wednesday, April 14, 2004 5:50 AM
Subject: Re: Slightly OT How to set a request header using JSTL
> Michael McGrady wrote:
>
> > Couldn't he wrap the response object inside a getter/setter facade?
> >
> I suppose one could do that, and even stick it (the response object)
> into the request attributes to make it visible to the EL via the
> "requestScope" magic variable. But a property setter only takes a
> single argument (the value), so you'd need a property setter for every
> possible header (which is technically infeasible, since the set of
> possible headers is unbounded), and you still wouldn't be able to deal
> with the cases where more than one value for a header can be added (via
> response.addHeader()).
>
> It is a far far better thing :-) to just use the <meta> tag that HTML
> provides for exactly this sort of purpose.
>
> <meta http-equiv="Header-Name" content="${the.value.for.this.header}">
>
> Besides the performance advantages of skipping all the mapping and
> facading, and making people scratch their heads over the resulting EL
> expressions, this has the advantage of clearly describing what's going
> on to anyone who is familiar with HTML.
>
> Craig
>
>
> > At 06:56 PM 4/13/2004, Craig McClanahan wrote:
> >
> >> Jim Collins wrote:
> >>
> >>> Hi Craig,
> >>>
> >>> Thanks for your response. I wanted to set the header in the JSP page
> >>> itself.
> >>> At the moment I set the header using a scriptlet (as you described
> >>> in your
> >>> post) but I would like to disable scriptlets in my JSP pages.
> >>> I was playing around with the EL and could print out the headers
> >>> using this
> >>> but I could find no way to set a header. I believe that Struts
> >>> provide a tag
> >>> that encapsulates the response that I could manipulate using the EL
> >>> but I
> >>> was wondering if I could do it using the explicit response object in
> >>> the EL.
> >>>
> >>>
> >> Unfortunately the "response" implicit object (that the JSP page
> >> compiler provides) is not visible through the EL directly. Even if
> >> it were, however, it wouldn't help much because you can only call
> >> property getters with EL expressions; not arbitrary methods with
> >> arbitrary parameters.
> >>
> >>> Regards
> >>>
> >>> Jim.
> >>>
> >>
> >> Craig
> >>
> >>
> >>> ----- Original Message ----- From: "Craig McClanahan"
> >>> <[EMAIL PROTECTED]>
> >>> To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
> >>> Sent: Tuesday, April 13, 2004 10:48 PM
> >>> Subject: Re: Slightly OT How to set a request header using JSTL
> >>>
> >>>
> >>>
> >>>
> >>>> Jim Collins wrote:
> >>>>
> >>>>
> >>>>
> >>>>> Hi,
> >>>>>
> >>>>> Has anyone any thoughts on this?
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>> The "header" object relates to the *request* headers. You can set
> >>>> *response* headers in a number of ways:
> >>>>
> >>>> * (Servlet 2.3 or later) in a Filter that wraps and postprocesses
> >>>> the response
> >>>>
> >>>> * In your Action (although that only works if you also do the output
> >>>> itself; doing a request dispatcher forward will clear the headers).
> >>>>
> >>>> * In a JSP page with scriptlets (as long as it's before the response
> >>>> is committed):
> >>>>
> >>>> <%
> >>>> response.setHeader("Foo", "bar");
> >>>> %>
> >>>>
> >>>> * In a JSP page with HTML <meta> tags in the <head> section:
> >>>>
> >>>> <meta http-equiv="Foo" content="bar">
> >>>>
> >>>> * (JSP 2.0 or later) you can use EL expressions to get the value part
> >>>> of the header from a bean property dynamically:
> >>>>
> >>>> <meta http-equiv="Foo" content="${mybean.fooValue}">
> >>>>
> >>>> * Ugly but workable using a Struts tag get the dynamic value:
> >>>>
> >>>> <meta http-equiv="Foo"
> >>>> content='<bean:write name="mybean" property="fooValue"/>'>
> >>>>
> >>>> This only works because <meta> is not a custom tag; otherwise
> >>>> the nesting syntax would be illegal.
> >>>>
> >>>>
> >>>>
> >>>>> Thanks
> >>>>>
> >>>>> Jim.
> >>>>>
> >>>>>
> >>>>>
> >>>> Craig
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>> ----- Original Message ----- From: "Jim Collins"
> >>>>> <[EMAIL PROTECTED]>
> >>>>> To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
> >>>>> Sent: Tuesday, April 06, 2004 10:10 PM
> >>>>> Subject: Slightly OT How to set a request header using JSTL
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>> Hi,
> >>>>>>
> >>>>>> I know how I can read request headers using c:out and the header
> >>>>>> object.
> >>>>>> Does anyone know how I can set a response header using c:set? Can
> >>>>>> it be
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>> done
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>> without using the response tag? I don't want to use scriptlets.
> >>>>>>
> >>>>>> Thanks
> >>>>>>
> >>>>>> Jim.
> >>>>>>
> >>>>>>
>
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> >>>>>>
> >>>>>>
> >>>>>>
>
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> >
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