/*

 * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.function.Supplier;

public class Http2RedirectHandler implements Http2Handler {

    final Supplier<String> supplier;

    public Http2RedirectHandler(Supplier<String> redirectSupplier) {

        supplier = redirectSupplier;

    }

    @Override

    public void handle(Http2TestExchange t) throws IOException {

        examineExchange(t);

        try (InputStream is = t.getRequestBody()) {

            is.readAllBytes();

            String location = supplier.get();

            System.err.printf("RedirectHandler request to %s from %s\n",

                t.getRequestURI().toString(), t.getRemoteAddress().toString());

            System.err.println("Redirecting to: " + location);

            HttpHeadersImpl map1 = t.getResponseHeaders();

            map1.addHeader("Location", location);

            t.sendResponseHeaders(301, 1024);

            byte[] bb = new byte[1024];

            OutputStream os = t.getResponseBody();

            os.write(bb);

            os.close();

            t.close();

        }

    }

    // override in sub-class to examine the exchange, but don't

    // alter transaction state by reading the request body etc.

    protected void examineExchange(Http2TestExchange t) {

    }

}