Java example source code file (ResponseCacheStream.java)

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Java - Java tags/keywords

bytearrayoutputstream, hello, httptransaction, inputstream, ioexception, let\'s, list, mycacherequest, myresponsecache, net, network, responsecachestream, string, testhttpserver, url, util

The ResponseCacheStream.java Java example source code

/*
 * Copyright (c) 2005, 2012, 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.
 */

/*
 * @test
 * @bug 6262486
 * @library ../../httptest/
 * @build HttpCallback TestHttpServer ClosedChannelList HttpTransaction
 * @run main/othervm -Dhttp.keepAlive=false ResponseCacheStream
 * @summary COMPATIBILITY: jagex_com - Monkey Puzzle applet fails to load
 */

import java.net.*;
import java.io.*;
import java.util.*;

public class ResponseCacheStream implements HttpCallback {

    void okReply (HttpTransaction req) throws IOException {
        req.setResponseEntityBody ("Hello, This is the response body. Let's make it as long as possible since we need to test the cache mechanism.");
        req.sendResponse (200, "Ok");
            System.out.println ("Server: sent response");
        req.orderlyClose();
    }

    public void request (HttpTransaction req) {
        try {
            okReply (req);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    static class MyCacheRequest extends CacheRequest {
        private OutputStream buf = null;

        public MyCacheRequest(OutputStream out) {
            buf = out;
        }

        public OutputStream getBody() throws IOException {
            return buf;
        }

        /**
         * Aborts the attempt to cache the response. If an IOException is
         * encountered while reading the response or writing to the cache,
         * the current cache store operation will be abandoned.
         */
        public void abort() {
        }

    }

    static class MyResponseCache extends ResponseCache {
        private ByteArrayOutputStream buf = new ByteArrayOutputStream(1024);

        public MyResponseCache() {
        }

        public CacheRequest put(URI uri, URLConnection conn) throws IOException {
            return new MyCacheRequest(buf);
        }

        public CacheResponse get(URI uri, String rqstMethod, Map<String, List rqstHeaders) throws IOException {
            return null;
        }

        public byte[] getBuffer() {
            return buf.toByteArray();
        }
    }

    static TestHttpServer server;

    public static void main(String[] args) throws Exception {
        MyResponseCache cache = new MyResponseCache();
        try {
            ResponseCache.setDefault(cache);
            server = new TestHttpServer (new ResponseCacheStream());
            System.out.println ("Server: listening on port: " + server.getLocalPort());
            URL url = new URL ("http://127.0.0.1:"+server.getLocalPort()+"/");
            System.out.println ("Client: connecting to " + url);
            HttpURLConnection urlc = (HttpURLConnection)url.openConnection();
            InputStream is = urlc.getInputStream();
            System.out.println("is is " + is.getClass() + ". And markSupported: " + is.markSupported());
            if (is.markSupported()) {
                byte[] b = new byte[1024];
                byte[] b2 = new byte[32];
                int len;
                int count;
                is.mark(10);
                len = is.read(b, 0, 10);
                is.reset();
                len = 0;
                count = 0;
                do {
                    len = is.read(b, count, 40 - count);
                    if (len > 0)
                        count += len;
                } while (len > 0);
                is.mark(20);
                len = is.read(b2, 0, 20);
                is.reset();
                len = is.read(b, count, 10);
                count += len;
                is.mark(20);
                len = is.read(b2, 0, 20);
                is.reset();
                do {
                    len = is.read(b, count, 1024 - count);
                    if (len > 0)
                        count += len;
                } while (len > 0);
                is.close();
                String s1 = new String(b, 0 , count);
                String s2 = new String(cache.getBuffer(), 0 , count);
                if (! s1.equals(s2))
                    throw new RuntimeException("cache got corrupted!");
            }
        } catch (Exception e) {
            if (server != null) {
                server.terminate();
            }
            throw e;
        }
        server.terminate();
    }
}