How do you check the browser's user agent in a JSP page using JSTL, EL?
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13-09-2019 - |
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
<c:set var="browser" value="${header['User-Agent']}" scope="session"/>
OTHER TIPS
<c:if test="${fn:contains(header['User-Agent'],'MSIE')}"></c:if>
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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