UnauthorizedEntryPoint.java

package net.dontdrinkandroot.example.angularrestspringsecurity.rest;

import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.AuthenticationEntryPoint;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * {@link AuthenticationEntryPoint} that rejects all requests with an unauthorized error message.
 *
 * @author Philip W. Sorst <philip@sorst.net>
 */
public class UnauthorizedEntryPoint implements AuthenticationEntryPoint
{
    @Override
    public void commence(
            HttpServletRequest request,
            HttpServletResponse response,
            AuthenticationException authException
    ) throws IOException, ServletException
    {
        response.sendError(
                HttpServletResponse.SC_UNAUTHORIZED,
                "Unauthorized: Authentication token was either missing or invalid."
        );
    }
}