Tutorial :How do you check the browser's user agent in a JSP page using JSTL, EL?



Question:

I need to check the browser's user-agent to see if it is IE6. However I shouldn't use scriptlets (we have a strict no scriptlets policy) to do this.

Currently I use

<%  String ua = request.getHeader( "User-Agent" );  boolean isMSIE = ( ua != null && ua.indexOf( "MSIE" ) != -1 );  %>    <% if( isMSIE ){ %>  <div>  <% } %>  

What is the cleanest way to do this using JSTL, EL, etc and not scriptlets?


Solution:1

<c:set var="browser" value="${header['User-Agent']}" scope="session"/>  


Solution:2

<c:if test="${fn:contains(header['User-Agent'],'MSIE')}"></c:if>  


Solution:3

If you are using spring-mobile framework you can use following to check device type

<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>       <c:choose>           <c:when test="${currentDevice.normal}"><p>"Welcome desktop user"</p> </c:when>          <c:when test="${currentDevice.mobile}"><p>"Welcome mobile user"</p>  </c:when>          <c:when test="${currentDevice.tab}"><p>"Welcome tab user"</p> </c:when>      </c:choose>  

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