darwin-x86/sample/nio/server/URLDumper.java

/*
 * Copyright (c) 2004, 2011, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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/*
 * This source code is provided to illustrate the usage of a given feature
 * or technique and has been deliberately simplified. Additional steps
 * required for a production-quality application, such as security checks,
 * input validation and proper error handling, might not be present in
 * this sample code.
 */


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

/**
 * A simple example to illustrate using a URL to access a resource
 * and then store the result to a File.
 * <P>
 * Any type of URL can be used:  http, https, ftp, etc.
 *
 * @author Brad R. Wetmore
 * @author Mark Reinhold
 */
public class URLDumper {
    public static void main(String[] args) throws Exception {

        if (args.length != 2) {
            System.out.println("Usage:  URLDumper <URL> <file>");
            System.exit(1);
        }

        String location = args[0];
        String file = args[1];

        URL url = new URL(location);
        FileOutputStream fos = new FileOutputStream(file);

        byte [] bytes = new byte [4096];

        InputStream is = url.openStream();

        int read;

        while ((read = is.read(bytes)) != -1) {
            fos.write(bytes, 0, read);
        }

        is.close();
        fos.close();
    }
}