1 /* 2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 */ 24 25 package java.net.http; 26 27 import java.io.IOException; 28 29 /** 30 * A header filter that can examine or modify, typically system headers for 31 * requests before they are sent, and responses before they are returned to the 32 * user. Some ability to resend requests is provided. 33 * 34 */ 35 interface HeaderFilter { 36 37 void request(HttpRequestImpl r) throws IOException; 38 39 /** 40 * Returns null if response ok to be given to user. Non null is a request 41 * that must be resent and its response given to user. If impl throws an 42 * exception that is returned to user instead. 43 */ 44 HttpRequestImpl response(HttpResponseImpl r) throws IOException; 45 }