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From "Mark Thomas" <ma...@apache.org>
Subject RE: Tomcat 5.5.12 and user-agent header
Date Wed, 12 Oct 2005 01:13:49 GMT
Have you looked at the headers between Tomcat and your UA? Is your UA actually
sending the UA header? If it is then it looks like a sitemesh problem from what
you have described. There are a range of tools for looking at headers.
livehttpheaders is good, as is TcpMon which is distributed as part of Axis.

Mark 

> -----Original Message-----
> From: Richard Mixon [mailto:rnmixon@qwest.net] 
> Sent: Monday, October 10, 2005 12:00 AM
> To: 'Tomcat Users List'
> Subject: RE: Tomcat 5.5.12 and user-agent header
> 
> Leon,
> 
> Thank you for the test - but I still get a null user-agent 
> right after the
> login. Here is a snippet of my code:
> 
>   <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" 
>       "http://www.w3.org/TR/html4/loose.dtd">
>   <%@ include file="/common/taglibs.jspf"%>
>   <%@ page import="com.ltoj.common.Constants" %>
>   <html:html locale="true">
>   <head>
>   <%@ include file="/common/meta.jspf" %>
>   <title><decorator:title/></title>
>   <script type="text/javascript" src="<c:url
> value='/scripts/environment.js'/>"></script>
>   <script type="text/javascript" src="<c:url
> value='/scripts/util.js'/>"></script>
>   <script type="text/javascript" src="<c:url
> value='/scripts/helptip.js'/>"></script>
>   <script type="text/javascript" src="<c:url
> value='/scripts/tabs.js'/>"></script>
>   <script type="text/javascript" src="<c:url
> value='/scripts/CalendarPopup.js'/>"></script>
>   <script type="text/javascript" src="<c:url
> value='/scripts/chartWizard.js'/>"></script>
>   <link rel="stylesheet" type="text/css" media="all" href="<c:url
> value='/styles/default.css'/>" /> 
>   <link rel="stylesheet" type="text/css" media="all" href="<c:url
> value='/styles/messages.css'/>" /> 
>   <link rel="stylesheet" type="text/css" media="all" href="<c:url
> value='/styles/tabs.css'/>" /> 
>   <decorator:head/>
>   <%
>   String _userAgent = request.getHeader("user-agent");
>   out.write("USER-AGENT='"+_userAgent+"'"); 
>   ...
> 
> Here's the sequence:
> 
> 1) I issue a request to this page.
> 
> 2) CMA says "oh, that's protected" and shows my custom login 
> page. I get
> user-agent displayed fine:
>      USER-AGENT='Mozilla/5.0 (Windows; U; Windows NT 5.2; 
> en-US; rv:1.7.12)
> Gecko/20050915 Firefox/1.0.7'
> 
> 3) But on the next page (the original target page of the request),
> user-agent shows as null.
>      USER-AGENT='null'
> 
> I can refresh the page or go to any other page in my 
> application and the
> user agent is fine again.
> 
> The only thing a bit non-standard about this JSP page is that it is a
> SiteMesh decorator page. 
> 
> If I run the same test, same pages in Tomcat 5.5.9 I never 
> get user-agent of
> null.
> 
> Our application does check the user-agent header a good bit. 
> We use Select
> lists with option groups - but some browsers do not support this so we
> simulate it by indenting the select options ourselves.
> 
> Luckily all of this activity happens well after the initial 
> login - so we
> are safe, now that I changed the decorator to make sure 
> user-agent is not
> null before doing anything with it.
> 
> But it seems other applications might be affected by this - no?
> 
> Thanks again - Richard
> 
> 
> 
> 
> 
> 
> -----Original Message-----
> From: Leon Rosenberg [mailto:rosenberg.leon@googlemail.com] 
> Sent: Sunday, October 09, 2005 1:45 PM
> To: Tomcat Users List; rnmixon@qwest.net
> Subject: Re: Tomcat 5.5.12 and user-agent header
> 
> Hmm, I downloaded 5.5.12 and tried the agent-header specific 
> code with it:
> 
> 	public void processLogin(User user, HttpServletRequest req,
> HttpServletResponse res) {
> 		StringBuffer info = new StringBuffer();
> 		info.append("login ");
> 		info.append(user.getUserName());
> 		info.append(" [");
> 		info.append(user.getUserId().getPlainPresentation());
> 		info.append("] ");
> 		info.append(user.getEmail());
> 		info.append(" ");
> 	
> info.append(UserHelper.getGenderDescription(user.getGender()));
> 		info.append(" ");
> 	
> info.append(UserHelper.getStatusDescription(user.getMembership
> Status()));
> 		info.append(" ");
> 		info.append(req.getRemoteAddr());
> 		info.append(" / ");
> 		info.append(req.getRemoteHost());
> 		info.append(" Agent: ");
> 		info.append(req.getHeader("user-agent"));
> 		log.info(info);		
> 	}
> 
> outcome was:
> 
> 2005-10-08 15:36:50,453 INFO  - login leon [6] xxx@xxx.xx male premium
> 127.0.0.1 / 127.0.0.1 Agent: Mozilla/5.0 (Windows; U; Windows 
> NT 5.0; en-US;
> rv:1.7) Gecko/20040626 Firefox/0.8
> 
> which I think was same behaviour as before.
> 
> I took tomcat out of the box (5.5.12 tar.gz) and only changed 
> the http port.
> 
> regards
> leon
> 
> 
> On 10/8/05, Richard Mixon <rnmixon@qwest.net> wrote:
> > I am just using the standard HTTP connector. This is on my 
> development 
> > workstation so I don't normally run JK and Apache, except for final
> testing.
> >
> > On the developer list I did see one mention of user-agent 
> header, but 
> > on closer inspection it appeared to be for a completely 
> different issue.
> >
> > Thanks - Richard
> >
> > -----Original Message-----
> > From: news [mailto:news@sea.gmane.org] On Behalf Of Bill Barker
> > Sent: Friday, October 07, 2005 10:13 PM
> > To: tomcat-user@jakarta.apache.org
> > Subject: Re: Tomcat 5.5.12 and user-agent header
> >
> >
> > "Richard Mixon" <rnmixon@qwest.net> wrote in message 
> > news:007801c5ca7b$0c13cea0$8a01a8c0@smartfish...
> > >I tested out my application on 5.5.12 yesterday and 
> noticed one small 
> > >anomally. I had a JSP in my sitemesh decorator "default.jsp" that 
> > >ends up  wrapping the login page for container managed 
> > >authentication. This page  had  a statement
> > >    String  _userAgent = 
> > >request.getHeader("user-agent").toLowerCase();
> > >
> > > It gets a null-pointer exception in 5.5.12, but under 
> 5.5.9 it runs
> fine.
> > > In
> > > 5.5.12, after the login succeeds then the user-agent 
> headers appear 
> > > to be there just fine, but not on the initial login page.
> > >
> > > Is this a known issue?
> > >
> >
> > It's certainly not a known issue.  It would help a lot if you could 
> > tell us which Connector you are using at the time (e.g. HTTP/1.1, 
> > HTTP/1.1-APR, AJP/1.3, AJP/1.3-APR).
> >
> > > Thank you - Richard
> > >
> >
> >
> >
> >
> > 
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> >
> >
> > 
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> >
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> 
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