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From Arnaud Héritier <aherit...@sopra.com>
Subject RE: Can't use Cookies in tag libraries ?????
Date Tue, 02 Oct 2001 14:53:04 GMT
I done it, but I would to store the info between two sessions, that's why I tried this.

> -----Message d'origine-----
> De:	Marcel May [SMTP:Marcel.May@consol.de]
> Date:	mardi 2 octobre 2001 16:40
> À:	tomcat-user@jakarta.apache.org; aheritier@sopra.com
> Cc:	'struts-user@jakarta.apache.org'
> Objet:	Re: Can't use Cookies in tag libraries ?????
> 
> Store your information in a bean with e.g. session scope?
> Is much simpler ... 
> 
> On Tue, Oct 02, 2001 at 04:40:05PM +0200, Arnaud H?ritier wrote:
> > After studying the problem, I'm agree with you Fernando.
> > It's not a good idea to access to the header components from a taglibrary.
> > I found a bypass to my problem substituting a <jsp:include> tag which flush

> > the content by a <@ include> which doesn't.
> > It works in this case but it's very bad and it reduces enormously the reuse 
> > of my taglibrary.
> > I thinks that this problem is very annoying. I wouldn't do a very 
> > complicated thing. I developped a page by page iterator, and I wanted to 
> > store from the taglibrary in a cookie the number of lines selected by the 
> > user, in order to be transparent in the jsp page.
> > what a shame that cookies are transfered in the header :-(
> > 
> > too bad for me
> > 
> > arno
> > 
> > 
> > > -----Message d'origine-----
> > > De:	Fernando_Salazar@lotus.com [SMTP:Fernando_Salazar@lotus.com]
> > > Date:	mardi 2 octobre 2001 16:16
> > > ?:	struts-user@jakarta.apache.org
> > > Cc:	Tomcat-User (Adresse de messagerie)
> > > Objet:	RE: Can't use Cookies in tag libraries ?????
> > >
> > >
> > > I would say its not good practice for a taglib to write any HTTP header 
> > --
> > > of course,  that includes cookies.
> > > Since tag extensions are designed to make scripted markup more 
> > expressive,
> > > compact, etc., they have to
> > > be allowed anywhere that markup is allowed.  If possibly Struts is 
> > causing
> > > headers to be committed sooner
> > > that you are used to, even if Struts did nothing, you could still never
> > > insure that your tag would be successfully
> > > be able to write a cookie in all instances -- there's nothing to stop 
> > your
> > > tag from being included at the bottom
> > > of a 50K JSP page.  Unless the servlet container had a large buffer, the
> > > headers would already be committed.
> > >
> > > In apps I've worked on, we've always had a usage of putting any 
> > statements
> > > that write headers -- those controlling page
> > > caching, for example -- at the top of our JSP's, before any markup is
> > > transmitted.  The mechanism is not
> > > foolproof, in that it relies on developers to understand and employ the
> > > usage, but then again this is no more
> > > burdensome that the 100 other things you need to know to make this stuff
> > > operate correctly.
> > >
> > > - Fernando
> > >
> > >
> > >
> > > 
> >    
> > >                     Arnaud 
> >    
> > >                     H?ritier             To:     "Tomcat-User (Adresse de 
> > messagerie)" <tomcat-user@jakarta.apache.org>
> > >                     <aheritier@sop       cc:     "Struts-User (Adresse de

> > messagerie)" <struts-user@jakarta.apache.org>, (bcc: Fernando
> > >                     ra.com>               Salazar/CAM/Lotus) 
> >    
> > >                                          Subject:     RE: Can't use 
> > Cookies in tag libraries ?????
> > >                     10/02/2001 
> >    
> > >                     07:42 AM 
> >    
> > >                     Please respond 
> >    
> > >                     to struts-user 
> >    
> > > 
> >    
> > > 
> >    
> > >
> > >
> > >
> > >
> > > Same think if I try to add a Cookie in the response from a JSP page :-(
> > >
> > > Sniffff
> > >
> > > I found that the response is already commited when I'm in the JSP Page.
> > > I don't undestand why !!!
> > > I use a servlet (Action Servlet from Struts Framework) which forward, 
> > after
> > > an action, to my JSP page.
> > >
> > > Can I bypass the commit of the response ???
> > >
> > >
> > >
> > >
> > > > -----Message d'origine-----
> > > > De:           Arnaud H?ritier [SMTP:aheritier@sopra.com]
> > > > Date:         mardi 2 octobre 2001 12:13
> > > > ?:       Tomcat-User (Adresse de messagerie)
> > > > Objet:        RE: Can't use Cookies in tag libraries ?????
> > > >
> > > > I just try to test with tomcat 4.0 standalone and I have the same 
> > problem
> > > :-(
> > > >
> > > > Craig, an idea ????
> > > >
> > > > > -----Message d'origine-----
> > > > > De:         Arnaud H?ritier [SMTP:aheritier@sopra.com]
> > > > > Date:       mardi 2 octobre 2001 12:03
> > > > > ?:          Tomcat-User (Adresse de messagerie)
> > > > > Objet:           Can't use Cookies in tag libraries ?????
> > > > >
> > > > > Hi all !!
> > > > >
> > > > > I face up to a problem concerning the use of cookies in a tag 
> > library.
> > > > >
> > > > > In my tag library I would like to store a cookie on the client.
> > > > > I wrote this in the doStartTag method of my tag :
> > > > >
> > > > >        HttpServletResponse httpResponse
> > > = (HttpServletResponse)pageContext.getResponse();
> > > > >        Cookie cookie = new Cookie("myCookie","cookie");
> > > > >        httpResponse.addCookie(cookie);
> > > > >
> > > > > but when later I retreive the list of cookies, this one is lacking.
> > > > >
> > > > > I tried to create cookies in my servlet and it works fine.
> > > > >
> > > > > I don't understand what it can happen !!!
> > > > >
> > > > > Can't we use cookies from tag libraries ????
> > > > >
> > > > > my configuration is :
> > > > > Tomcat 3.2.3
> > > > > AJP1.2
> > > > > Apache 1.3.20
> > > > > IE5.5
> > > > >
> > > > >
> > > > > Have you any ideas ???
> > > > >
> > > > > thanks
> > > > >
> > > > >
> > > > > Arnaud HERITIER
> > > > > Ing?nieur d'?tudes
> > > > > SOPRA. Group
> > > > > EAI Consulting
> > > > > Tel : +33-1-53-33-44-74
> > > > > Email : aheritier@sopra.com
> > > > >
> > >
> > >
> > >
> > >
> 
> -- 
> Marcel May
> Development
> ConSol* GmbH<< Fichier: ATT00034.att>>


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