package com.elm.mb.rest.filters;
import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.web.filter.OncePerRequestFilter;
/**
* Enabling CORS support - Access-Control-Allow-Origin
* @author zeroows@gmail.com
*
* <code>
<!-- Add this to your web.xml to enable "CORS" -->
<filter>
<filter-name>cors</filter-name>
<filter-class>com.elm.mb.rest.filters.CORSFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>cors</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
* </code>
*/
public class CORSFilter extends OncePerRequestFilter {
private static final Log LOG = LogFactory.getLog(CORSFilter.class);
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
response.addHeader("Access-Control-Allow-Origin", "*");
if (request.getHeader("Access-Control-Request-Method") != null && "OPTIONS".equals(request.getMethod())) {
LOG.trace("Sending Header....");
// CORS "pre-flight" request
response.addHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE");
// response.addHeader("Access-Control-Allow-Headers", "Authorization");
response.addHeader("Access-Control-Allow-Headers", "Content-Type");
response.addHeader("Access-Control-Max-Age", "1");
}
filterChain.doFilter(request, response);
}
}
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To enable CORS support in Spring MVC 4 - Access-Control-Allow-Origin
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