搞什麼安全漏洞檢查,在加個防止惡意彈窗的吧

package com.wh.tms.xss;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;

public class XssHttpServletRequestWrapper extends HttpServletRequestWrapper{

	public XssHttpServletRequestWrapper(HttpServletRequest servletRequest) {
		super(servletRequest);
		
	}
	public String[] getParameterValues(String parameter) {
	      String[] values = super.getParameterValues(parameter);
	      if (values==null)  {
	                  return null;
	          }
	      int count = values.length;
	      String[] encodedValues = new String[count];
	      for (int i = 0; i < count; i++) {
	                 encodedValues[i] = cleanXSS(values[i]);
	       }
	      return encodedValues;
	    }
	    public String getParameter(String parameter) {
	          String value = super.getParameter(parameter);
	          if (value == null) {
	                 return null;
	                  }
	          return cleanXSS(value);
	    }
	    public String getHeader(String name) {
	        String value = super.getHeader(name);
	        if (value == null)
	            return null;
	        return cleanXSS(value);
	    }
	    private String cleanXSS(String value) {
	        value = value.replaceAll("<", "& lt;").replaceAll(">", "& gt;");
	        value = value.replaceAll("\\(", "& #40;").replaceAll("\\)", "& #41;");
	        value = value.replaceAll("'", "& #39;");
	        value = value.replaceAll("eval\\((.*)\\)", "");
	        value = value.replaceAll("[\\\"\\\'][\\s]*javascript:(.*)[\\\"\\\']", "\"\"");
	        value = value.replaceAll("script", "");
	        return value;
	    }

}
 

package com.wh.tms.xss;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

public class XssFilter implements Filter{

	FilterConfig filterConfig = null;
	 
    public void init(FilterConfig filterConfig) throws ServletException {
        this.filterConfig = filterConfig;
    }
 
    public void destroy() {
        this.filterConfig = null;
    }
 
    public void doFilter(ServletRequest request, ServletResponse response,
            FilterChain chain) throws IOException, ServletException {
        chain.doFilter(new XssHttpServletRequestWrapper( (HttpServletRequest) request), response);
    }

}
 

在filter裡完成惡意字串的過濾,如果有更多的過濾,可以再clear方法中過濾更多的惡意輸入.

主要防止<script>標籤alert(xxx)這些

web.xml

<filter>
    	<filter-name>XssFilter</filter-name>
     	<filter-class>com.wh.tms.xss.XssFilter</filter-class>
	</filter>
	<filter-mapping>
	     <filter-name>XssFilter</filter-name>
	     <url-pattern>*.html</url-pattern>
	     <dispatcher>REQUEST</dispatcher>
	</filter-mapping>
	<filter-mapping>
	     <filter-name>XssFilter</filter-name>
	     <url-pattern>*.json</url-pattern>
	     <dispatcher>REQUEST</dispatcher>
	</filter-mapping>
 

這裡是允許配置多個filter的,不過配置過多的話會降低執行效率.

這個比許可權過濾的那個好弄