package com.zcloud.config;

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 org.springframework.stereotype.Component;

/**
 * 说明：跨域访问处理
 * 作者：luoxiaobao
 * 官网：www.qdkjchina.com
 */
@Component
public class CORSFilter implements Filter {

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {

	}

	@Override
	public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
			throws IOException, ServletException {

		HttpServletRequest request = (HttpServletRequest) servletRequest;
		HttpServletResponse response = (HttpServletResponse) servletResponse;
		response.setContentType("textml;charset=UTF-8");
		response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
		response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
		response.setHeader("Access-Control-Max-Age", "0");
		response.setHeader("Access-Control-Allow-Headers","Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With,userId,token");
		response.setHeader("Access-Control-Allow-Credentials", "true"); // 是否支持cookie跨域        
		response.setHeader("XDomainRequestAllowed", "1");
		filterChain.doFilter(servletRequest, servletResponse);

	}

	@Override
	public void destroy() {

	}
}
