?? validatetag.java
字號:
package org.it315;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;
public class ValidateTag extends TagSupport
{
private String url;
public void setUrl(String url)
{
this.url = url;
}
public int doEndTag() throws JspException
{
HttpServletRequest req = (HttpServletRequest)pageContext.getRequest();
String referrer = req.getHeader("referer");
String sitePart = "http://" + req.getServerName();
if(referrer!=null && referrer.startsWith(sitePart))
{
return EVAL_PAGE;
}
else
{
try
{
pageContext.forward(url);
}
catch (Exception e)
{
e.printStackTrace();
}
return SKIP_PAGE;
}
}
}
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