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Subject: RE: ServletContextListener - how to detect http path of web     
    application?
Date: Wed, 21 Dec 2005 17:17:06 -0000
Message-ID: 
 <2DF66B61F300C247ACF5F407088D80B10DD7F8@LDNPCMEU302VEUA.INTRANET.BARCAPINT.COM>
Thread-Topic: ServletContextListener - how to detect http path of web
    application?
Thread-Index: AcYGUCCgiA+n4S8iQlOuXn2i8RC9KgAAQrOQ
From: <Iain.Shepherd@barclayscapital.com>
To: <users@tomcat.apache.org>

Thanks, I might try that.

I already made a javax.servlet.Filter, that catches the first request to
the server, calls HttpServletRequest.getContextPath(), and stores the
result.

Of course the Filter actually gets hit on *every single request* to the
server. You might call it a brute force solution :-)

Iain


-----Original Message-----
From: Frank W. Zammetti [mailto:fzlists@omnytex.com]=20
Sent: 21 December 2005 17:00
To: Tomcat Users List
Cc: Tomcat Users List
Subject: Re: ServletContextListener - how to detect http path of web
application?


Tim is right, you can't do it directly.  You *might* be able to
construct it in a roundabout way though...

Let's assumg you know the method, http vs. https, and its always one or
the other.  Let's also assume that the <display-name> element in web.xml
names the application context (i.e., if the URL is
http://myserver/myapp, then <display-name>myapp<display-name>.  I
believe the following (without actually trying it) would work...

String s =3D "http://";
s +=3D new InetAddress.getHostName();
s +=3D "/" + servletContext.getServletContextName();

Kind of hack solution, but it might be OK for your application (assuming
it actually works!)

--=20
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM: fzammetti
Yahoo: fzammetti
MSN: fzammetti@hotmail.com

On Wed, December 21, 2005 6:22 am, Tim Funk said:
> There is no way to detect the contextPath on servletInit. It can only=20
> be done after the first request. (Using=20
> HttpServletRequest.getContextPath())
>
>
> -Tim
>
> Iain.Shepherd@barclayscapital.com wrote:
>> Hi,
>>
>> Apols for a newbie question, I didn't have much luck with the=20
>> archives or in Google.
>>
>> In my ServletContextListener.contextInitialized method, I need to=20
>> detect the public http path of my web app. i.e.=20
>> http://servername/approot/
>>
>> How can I do this?
>> event.getServletContext().getResource("/") gives me=20
>> "jndi:/localhost/", not very helpful.
>>
>
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