/*
* Copyright 2002-2015 the original author or authors.
*
* 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.springframework.web.cors;
import javax.servlet.http.HttpServletRequest;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
/**
* Utility class for CORS request handling based on the
* <a href="http://www.w3.org/TR/cors/">CORS W3C recommandation</a>.
*
* @author Sebastien Deleuze
* @since 4.2
*/
public abstract class CorsUtils {
/**
* Returns {@code true} if the request is a valid CORS one.
*/
public static boolean isCorsRequest(HttpServletRequest request) {
return (request.getHeader(HttpHeaders.ORIGIN) != null);
}
/**
* Returns {@code true} if the request is a valid CORS pre-flight one.
*/
public static boolean isPreFlightRequest(HttpServletRequest request) {
return (isCorsRequest(request) && HttpMethod.OPTIONS.matches(request.getMethod()) &&
request.getHeader(HttpHeaders.ACCESS_CONTROL_REQUEST_METHOD) != null);
}
}