package com.supermap.huawei;

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;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpServletResponseWrapper;

/**

 * 1、输出http信息 2、修改返回的状态码

 *

 */

public class ResponseCodeFilter implements Filter {

	@Override

	public void init(FilterConfig filterConfig) throws ServletException {

	}

	@Override

	public void doFilter(ServletRequest req, ServletResponse res,

			FilterChain chain) throws IOException, ServletException {

		HttpServletRequest request = (HttpServletRequest) req;

		StatusExposingServletResponse response = new StatusExposingServletResponse(

				(HttpServletResponse) res);

		String ip = request.getRemoteAddr();

		String method = request.getMethod();

		String url = request.getRequestURI();

		String characterEncoding = request.getCharacterEncoding();

		String referer = request.getHeader("Referer");

		chain.doFilter(request, response);

		int status = response.getStatus();

		System.out.println(ip + method + characterEncoding + referer + url

				+ status);

		// String s1 = "" + status;

		if (status == 201) {

			// if(s1.contains("20")){

			response.setStatus(200);

		} else {

			response.setStatus(status);

		}

	}

	@Override

	public void destroy() {

	}

	public static class StatusExposingServletResponse extends

			HttpServletResponseWrapper implements HttpServletResponse {

		private int status = 200;

		public StatusExposingServletResponse(HttpServletResponse response) {

			super(response);

		}

		@Override

		public void setStatus(int sc) {

			this.status = sc;

			super.setStatus(sc);

		}

		public int getStatus() {

			return status;

		}

	}

}

<filter>

	<filter-name>ResponseCodeFilter</filter-name>

	<filter-class>com.supermap.test.ResponseCodeFilter</filter-class>

</filter>

<filter-mapping>

	<filter-name>ResponseCodeFilter</filter-name>

	<url-pattern>/*</url-pattern>

</filter-mapping>