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Custom JSP tag. Evaluates and processes own body if the specified referer field matches to the given criteria. As a referer field you may use client's IP address, an URL for the page from which client's request was redirected to your JSP page (referer), User-Agent info and Accept header. So, this tag will be useful when you need to add support for advertising, personalization or security in your JSP pages. For example:
<%@ taglib uri="taglib.tld" prefix="if" %> <!-- disable access from the specified IP address --> <if:Referer field="ip" pattern="192.168.1.1"> <% return; %> </if:Referer> When you describe your criteria, you may use metasymbol * which will
match to any substring. For example:
<%@ taglib uri="taglib.tld" prefix="if" %> <!-- some special procedure for all requests from Google --> <if:Referer field="url" pattern="http://www.google.com*"> <% out.println("Google is a cool search engine!"); %> </if:Referer> <!-- do something for MS IE browser --> <if:Referer field="agent" pattern="*MSIE*"> <% out.println("Your browser is MS IE!"); %> </if:Referer> <!-- do something for mobiles with WAP/WML --> <if:Referer field="accept" pattern="*wap.wml*"> <% out.println("User with mobile!"); %> </if:Referer> <!-- disable access for bots --> <if:Referer field="agent" pattern="*bot*"> <% return; %> </if:Referer> Tags are: Referer Evaluates own body in case of referer field matches to the given pattern. Parameters are: 1) field Optional parameter. Describes referer field. Possible values are ip, url, agent, accept.
Default value is url.
for downloading: Library: reftag.jar Description: taglib.tld See also Coldtags suite - the largest collection of custom JSP tags. |
Also in Coldtags:
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