Cross-Origin Request Blocked Spring REST service + AJAX

Question

Unable to call spring REST service

My spring service

@RequestMapping(value = \"/MAS/authenticate\", method = RequestMethod.POST)
public ResponseEnti         


        

Answer 1

My AJAX call and service were OK. After searching a lot on internet i have found that its server side problem not client side.

on server side with Spring we have to implement filter which will allow CORS requests.

filter will look like this.

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;

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);
    }

}

and in web.xml apply this filter on your service requests like this

    
        cors
        com.test.common.controller.CORSFilter 
    
    
        cors
        /*
     

This may help someone else who went through this problem. :)