Creating a EL function to return browser name
There are some situations where we need know the browser name to perform some changes on page code, the java code below defines a EL function to help on retrieve the browser name.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | package br.eti.faces.el; import javax.faces.context.FacesContext; import javax.servlet.http.HttpServletRequest; public final class Browser { public static String name() { FacesContext context=FacesContext.getCurrentInstance(); HttpServletRequest request= (HttpServletRequest)context.getExternalContext(). getRequest(); String useragent= request.getHeader("user-agent"); useragent=useragent.toLowerCase(); if (useragent.indexOf("opera")!=-1) return "opera"; if (useragent.indexOf("netscape")!=-1) return "netscape"; if (useragent.indexOf("msie")!=-1) return "ie"; if (useragent.indexOf("firefox")!=-1) return "firefox"; return ""; } } |
You can register the function above on facelets by adding the piece of xml code below in a file named browser.taglib.xml
[cc lang="xml"]
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Posted by rogerio |
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