JSP User Agent analyzer

ua-analyzer.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
<c:set var="ua" value="${fn:toLowerCase(header['User-Agent'])}" />
<c:set var="chrome" value="${fn:contains(ua, 'chrome') && !fn:contains(ua, 'msie')}" />
<fmt:formatNumber var="chrome_version" value="${ chrome ? fn:substringBefore(fn:substringAfter(ua, 'chrome/'), '.') : 0}" />
<c:set var="ff" value="${fn:contains(ua, 'firefox') && !fn:contains(ua, 'opera')}" />
<fmt:formatNumber var="ff_version" value="${ ff ? fn:substringBefore(fn:substringAfter(ua, 'firefox/'), '.') : 0}" />
<c:set var="opera" value="${fn:contains(ua, 'opera')}" />
<fmt:formatNumber var="opera_version" value="${opera ?
	( fn:contains(ua, 'version/') ?
		fn:substringBefore(fn:substringAfter(ua, 'version/'), '.')
		: fn:substringBefore(fn:substringAfter(ua, 'opera '), '.') )
	: 0}" />
<c:set var="ms" value="${fn:contains(ua, 'msie')}" />
<fmt:formatNumber var="ms_version" value="${ ms ? fn:substringBefore(fn:substringAfter(ua, 'msie '), '.') : 0 }" />
<c:set var="android" value="${fn:contains(ua, 'android')}" />
<fmt:formatNumber var="android_version" value="${ android ? fn:substringBefore(fn:substringAfter(ua, 'android '), '.') : 0 }" />
<c:set var="ios" value="${fn:contains(ua, 'ipad')||fn:contains(ua, 'iphone')||fn:contains(ua, 'ipod')}" />
<fmt:formatNumber var="ios_version" value="${ ios ? fn:substringBefore(fn:substringAfter(ua, 'os '), '_') : 0 }" />

ua: <c:out value="${ua}" />
<br />
<br />
chrome: <c:out value="${chrome}" />, <c:out value="${chrome_version}" />
<br />
ff: <c:out value="${ff}" />, <c:out value="${ff_version}" />
<br />
opera: <c:out value="${opera}" />, <c:out value="${opera_version}" />
<br />
ms: <c:out value="${ms}" />, <c:out value="${ms_version}" />
<br />
android: <c:out value="${android}" />, <c:out value="${android_version}" />
<br />
ios: <c:out value="${ios}" />, <c:out value="${ios_version}" />
<br />