package greenH5.util;

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;

/**
 * Servlet Filter implementation class CORSFilter
 */
// Enable it for Servlet 3.x implementations
/* @ WebFilter(asyncSupported = true, urlPatterns = { "/*" }) */
public class AjaxFilter implements Filter {


	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain)
			throws IOException, ServletException {

		HttpServletRequest request = (HttpServletRequest) servletRequest;
		String urlString = request.getRequestURL().toString();
		if (urlString.contains("greenH5/workbench/default.jsp")) {
			return;
		}
		// Authorize (allow) all domains to consume the content
		((HttpServletResponse) servletResponse).addHeader("Access-Control-Allow-Origin", "*");
		((HttpServletResponse) servletResponse).addHeader("Access-Control-Allow-Methods","GET, POST");
		((HttpServletResponse) servletResponse).addHeader("Access-Control-Allow-Headers", "Content-Type,token,u");

		
		String method = request.getMethod();
		// For HTTP OPTIONS verb/method reply with ACCEPTED status code -- per CORS handshake
		if ("OPTIONS".equals(method)) {
			HttpServletResponse resp = (HttpServletResponse) servletResponse;
			resp.setStatus(HttpServletResponse.SC_OK);
			return;
		}

		// pass the request along the filter chain
		chain.doFilter(request, servletResponse);
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		// TODO Auto-generated method stub
	}

	public void destroy() {
		// TODO Auto-generated method stub
		
	}

}