Retrieving USER-AGENT Header

[Nicole Luneburg]

Hi,

I want to do this in my main.jsp page:

<%
if(request.getHeader("user-agent").startsWith("Mozilla")) {
%>

display this

<%
} else {
%>

display this

<%
}
%>

I don't know how to do the request bit ...
Eg is it:

HttpServletRequest request = new HttpServletRequest();
or is it just request.getHeader
or HttpRequest request = new HttpRequest();

Do i need libraries? If so, how does that work in magnolia?
Can I import stuff in magnolia jsp's like in a normal java project?

That's what I'm lost on!

Thanks

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[David Smith]

You should be able to do this:

<c:set
var="mozUserAgent"><jsp:expression>((javax.servlet.http.HttpSerletRequest)pageContext.getRequest()).getHeader(
"user-agent" ).startsWith( "Mozilla" )</jsp:expression></c:set>

<c:if test="${mozUserAgent}">
<p>display....</p>
</c:if>
<c:if test="${not mozUserAgent}">
<p>display something different....</p>
</c:if>

There may be functions in the standard taglib to reduce this to
something like:

<c:if test="${not fn:startsWith( header.user-agent, 'Mozilla' )}">
<p>display....</p>
</c:if>

But I'd have to do more digging into the standard taglib docs than I
really want to right now. The first one should work without digging
into additional expression language functions.

--David

Post by Nicole Luneburg
Hi,
<%
if(request.getHeader("user-agent").startsWith("Mozilla")) {
%>
display this
<%
} else {
%>
display this
<%
}
%>
I don't know how to do the request bit ...
HttpServletRequest request = new HttpServletRequest();
or is it just request.getHeader
or HttpRequest request = new HttpRequest();
Do i need libraries? If so, how does that work in magnolia?
Can I import stuff in magnolia jsp's like in a normal java project?
That's what I'm lost on!
Thanks
----------------------------------------------------------------
for list details see
http://www.magnolia.info/en/magnolia/developer.html
----------------------------------------------------------------

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[Nicole Luneburg]

Hi David,

Thank you very very much for that!
With a bit of tweaking, it now works!
Here's my code for anyone who wants to do anything similar:

<c:set var="mozillaUA">
<jsp:expression>

((javax.servlet.http.HttpServletRequest)pageContext.getRequest()).getHeader(
"user-agent" ).indexOf( "Firefox/" ) != -1
</jsp:expression>
</c:set>
<c:set var="ieUA">
<jsp:expression>

((javax.servlet.http.HttpServletRequest)pageContext.getRequest()).getHeader(
"user-agent" ).indexOf( "MSIE" ) != -1
</jsp:expression>
</c:set>

<c:if test="${mozillaUA}">
<p>You are using Mozilla! ...</p>
</c:if>
<c:if test="${ieUA}">
<p>You are using IE! ...</p>
</c:if>

Careful how to detect browsers ... I was doing this to detect Mozilla:
useragent.startsWith("Mozilla")
and it kept coming back as true for IE too, it's because its user agent
(at least for IE 6) starts with "Mozilla"!!!

Thanks again David!

Post by David Smith
<c:set
var="mozUserAgent"><jsp:expression>((javax.servlet.http.HttpSerletRequest)pageContext.getRequest()).getHeader(
"user-agent" ).startsWith( "Mozilla" )</jsp:expression></c:set>
<c:if test="${mozUserAgent}">
<p>display....</p>
</c:if>
<c:if test="${not mozUserAgent}">
<p>display something different....</p>
</c:if>
There may be functions in the standard taglib to reduce this to
<c:if test="${not fn:startsWith( header.user-agent, 'Mozilla' )}">
<p>display....</p>
</c:if>
But I'd have to do more digging into the standard taglib docs than I
really want to right now. The first one should work without digging
into additional expression language functions.
--David

Post by Nicole Luneburg
Hi,
<%
if(request.getHeader("user-agent").startsWith("Mozilla")) {
%>
display this
<%
} else {
%>
display this
<%
}
%>
I don't know how to do the request bit ...
HttpServletRequest request = new HttpServletRequest();
or is it just request.getHeader
or HttpRequest request = new HttpRequest();
Do i need libraries? If so, how does that work in magnolia?
Can I import stuff in magnolia jsp's like in a normal java project?
That's what I'm lost on!
Thanks
----------------------------------------------------------------
for list details see
http://www.magnolia.info/en/magnolia/developer.html
----------------------------------------------------------------

----------------------------------------------------------------
for list details see
http://www.magnolia.info/en/magnolia/developer.html
----------------------------------------------------------------

Regards,

Nicole Luneburg
Software Developer
--
LISAsoft http://www.lisasoft.com
38 Greenhill Road
Wayville SA 5034
Ph: [phone]
Fax: [phone]

[Ali HAMMADI GHANEM]

Hi Nicole,

I used this solution (a taglib) but I got a problem when I activated the
cache of magnolia. So if you use this solution, you will get problem
when you change your browser (IE to Firefox or ...)

Regards

Ali HAMMADI

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[Nicole Luneburg]

Thanks Ali,

Thanks for that!
Maybe there is a cache refresh command that can be called ...
I'll look into it if the problem occurs.

Thanks again

Post by Ali HAMMADI GHANEM
Hi Nicole,
I used this solution (a taglib) but I got a problem when I activated
the cache of magnolia. So if you use this solution, you will get
problem when you change your browser (IE to Firefox or ...)
Regards
Ali HAMMADI
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for list details see
http://www.magnolia.info/en/magnolia/developer.html
----------------------------------------------------------------

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[Ali HAMMADI GHANEM]

Hi Nicole,

If you want, you can user a script (in javascript) which can identify
your browser.
This is the link:
http://www.quirksmode.org/js/detect.html

Regards,

Ali

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