001    /**
002     * Copyright (C) 2009-2011 the original author or authors.
003     * See the notice.md file distributed with this work for additional
004     * information regarding copyright ownership.
005     *
006     * Licensed under the Apache License, Version 2.0 (the "License");
007     * you may not use this file except in compliance with the License.
008     * You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package org.fusesource.restygwt.client.callback;
020    
021    import org.fusesource.restygwt.client.Method;
022    import org.fusesource.restygwt.client.cache.QueueableCacheStorage;
023    
024    import com.google.gwt.http.client.RequestCallback;
025    import com.google.gwt.http.client.Response;
026    
027    public class XSRFTokenCallbackFilter implements CallbackFilter {
028    
029        protected XSRFToken xsrf;
030    
031        public XSRFTokenCallbackFilter(XSRFToken xsrf) {
032            this.xsrf = xsrf;
033        }
034    
035        @Override
036        public RequestCallback filter(final Method method, final Response response,
037                RequestCallback callback) {
038            // is it a live response ?
039            if (response.getHeader(QueueableCacheStorage.RESTY_CACHE_HEADER) == null){
040                this.xsrf.token = response.getHeader(this.xsrf.getHeaderKey());
041            }
042            return callback;
043        }
044    }