package com.hs.servlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import org.apache.commons.lang.StringEscapeUtils;
/**
*
* @date 上午9:44:40
* @author DuChaoWei
* @descripte
*/
public class XSSRequestWrapper extends HttpServletRequestWrapper {
/**
* 构造方法
*
* @param request
*/
public XSSRequestWrapper(HttpServletRequest request) {
super(request);
}
/**
* 处理参数值
*/
@Override
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] = dealString(values[i]);
}
return encodedValues;
}
/**
* 覆盖
*
* @date 上午9:30:43
* @author DuChaoWei
* @descripte
* @param value
* @return
*/
@Override
public String getParameter(String parameter) {
String value = super.getParameter(parameter);
return dealString(value);
}
@Override
public String getHeader(String name) {
String value = super.getHeader(name);
return dealString(value);
}
/**
* 字符串处理
*
* @date 上午9:30:43
* @author DuChaoWei
* @descripte
* @param value
* @return
*/
private String dealString(String value) {
if (value != null) {
// 采用spring的StringEscapeUtils工具类 实现
StringEscapeUtils.escapeHtml(value);
StringEscapeUtils.escapeJavaScript(value);
StringEscapeUtils.escapeSql(value);
}
return value;
}
}
package com.hs.servlet;
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;
/**
* 防止xss攻击 过滤器（顺便过滤了 sql攻击）
* @date 上午9:58:58
* @author DuChaoWei
* @descripte
*/
public class XSSFilter implements Filter {
@Override
public void init(FilterConfig arg0) throws ServletException {
}
@Override
public void destroy() {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
chain.doFilter(new XSSRequestWrapper((HttpServletRequest) request), response);
}
}