CorsFilter.java
/*******************************************************************************
* Copyright 2017 The MIT Internet Trust Consortium
*
* Portions copyright 2011-2013 The MITRE Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
/**
*
*/
package org.mitre.oauth2.web;
import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.OncePerRequestFilter;
/**
*
* Implements Cross-Origin Resource Sharing (CORS) headers. This filter adds the CORS
* headers to all requests that pass through it, and as such it should be used only
* on endpoints that require CORS support.
*
* @author jricher
*
*/
@Component("corsFilter")
public class CorsFilter extends OncePerRequestFilter {
/* (non-Javadoc)
* @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)
*/
@Override
public void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws IOException, ServletException {
response.addHeader("Access-Control-Allow-Origin", "*");
if (request.getHeader("Access-Control-Request-Method") != null && "OPTIONS".equals(request.getMethod())) {
// CORS "pre-flight" request
response.addHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE");
response.addHeader("Access-Control-Allow-Headers", "X-Requested-With,Origin,Content-Type, Accept, Authorization");
}
filterChain.doFilter(request, response);
}
}