Java example source code file (RequestPropertyValues.java)

This example Java source code file (RequestPropertyValues.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

arraylist, dummyurlconnection, exception, key, list, method, net, network, npe, nullpointerexception, requestproperty, requestpropertyvalues, string, testheader, url, urlconnection, util

The RequestPropertyValues.java Java example source code

/*
 * Copyright (c) 2002, 2013, 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 4644775 6230836
 * @summary Test URLConnection Request Proterties
 */

import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;

/**
 * Part1:
 *   bug 4644775: Unexpected NPE in setRequestProperty(key, null) call
 * Part2:
 *   bug 6230836: A few methods of class URLConnection implemented incorrectly
 */

public class RequestPropertyValues {

    public static void main(String[] args) throws Exception {
        part1();
        part2();
    }

    public static void part1() throws Exception {
        List<URL> urls = new ArrayList<>();
        urls.add(new URL("http://localhost:8088"));
        urls.add(new URL("file:/etc/passwd"));
        urls.add(new URL("jar:http://foo.com/bar.html!/foo/bar"));
        if (hasFtp())
            urls.add(new URL("ftp://foo:bar@foobar.com/etc/passwd"));

        boolean failed = false;

        for (URL url : urls) {
            URLConnection uc = url.openConnection();
            try {
                uc.setRequestProperty("TestHeader", null);
            } catch (NullPointerException npe) {
                System.out.println("setRequestProperty is throwing NPE" +
                                " for url: " + url);
                failed = true;
            }
            try {
                uc.addRequestProperty("TestHeader", null);
            } catch (NullPointerException npe) {
                System.out.println("addRequestProperty is throwing NPE" +
                                " for url: " + url);
                failed = true;
            }
        }
        if (failed) {
            throw new Exception("RequestProperty setting/adding is" +
                                " throwing NPE for null values");
        }
    }

    public static void part2() throws Exception {
        URL url = null;
        String[] goodKeys = {"", "$", "key", "Key", " ", "    "};
        String[] goodValues = {"", "$", "value", "Value", " ", "    "};

        URLConnection conn = getConnection(url);

        for (int i = 0; i < goodKeys.length; ++i) {
            for (int j = 0; j < goodValues.length; ++j) {
                // If a property with the key already exists, overwrite its value with the new value
                conn.setRequestProperty(goodKeys[i], goodValues[j]);
                String value = conn.getRequestProperty(goodKeys[i]);

                if (!((goodValues[j] == null && value == null) || (value != null && value.equals(goodValues[j]))))
                    throw new RuntimeException("Method setRequestProperty(String,String) works incorrectly");
            }
        }
    }

    static URLConnection getConnection(URL url) {
        return new DummyURLConnection(url);
    }

    static class DummyURLConnection extends URLConnection {

        DummyURLConnection(URL url) {
            super(url);
        }

        public void connect() {
            connected = true;
        }
    }

    private static boolean hasFtp() {
        try {
            return new java.net.URL("ftp://") != null;
        } catch (java.net.MalformedURLException x) {
            System.out.println("FTP not supported by this runtime.");
            return false;
        }
    }
}