CorsFilter.java

/**
 * 
 */
package org.minnal.api.filter;

import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerResponseContext;
import javax.ws.rs.container.ContainerResponseFilter;

import com.google.common.base.Strings;

/**
 * @author ganeshs
 * 
 */
public class CorsFilter implements ContainerResponseFilter {

	@Override
	public void filter(ContainerRequestContext requestContext, ContainerResponseContext responseContext) {
		responseContext.getHeaders().add("Access-Control-Allow-Origin", "*");
		responseContext.getHeaders().add("Access-Control-Allow-Methods", "GET, POST, OPTIONS");

		String reqHead = requestContext.getHeaderString("Access-Control-Request-Headers");

		if (! Strings.isNullOrEmpty(reqHead)) {
			responseContext.getHeaders().add("Access-Control-Allow-Headers", reqHead);
		}
	}

}