1 /*

     2  * Copyright (c) 2015, 2018, 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  * questions.

    24  */

    25 

    26 package jdk.internal.net.http;

    27 

    28 import java.io.IOException;

    29 

    30 /**

    31  * A header filter that can examine or modify, typically system headers for

    32  * requests before they are sent, and responses before they are returned to the

    33  * user. Some ability to resend requests is provided.

    34  */

    35 interface HeaderFilter {

    36 

    37     void request(HttpRequestImpl r, MultiExchange<?> e) 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(Response r) throws IOException;

    45 }