org.eclipse.wst.ws.internal.parser.discovery.NetUtils.java Source code

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Here is the source code for org.eclipse.wst.ws.internal.parser.discovery.NetUtils.java

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/*******************************************************************************
 * Copyright (c) 2001, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 * IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.wst.ws.internal.parser.discovery;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

import org.apache.commons.codec.binary.Base64;

public final class NetUtils {

    /**
     * Get the java.net.URLConnection given a string representing the URL. This class ensures
     * that proxy settings in WSAD are respected.
     * @param urlString String representing the URL.
     * @return java.net.URLCDonnection URLConnection to the URL.
     */
    public static final URLConnection getURLConnection(String urlString) {
        try {
            URL url = createURL(urlString);
            URLConnection uc = url.openConnection();
            String proxyUserName = System.getProperty("http.proxyUserName");
            String proxyPassword = System.getProperty("http.proxyPassword");
            if (proxyUserName != null && proxyPassword != null) {
                StringBuffer userNamePassword = new StringBuffer(proxyUserName);
                userNamePassword.append(':').append(proxyPassword);
                Base64 encoder = new Base64();
                String encoding = new String(encoder.encode(userNamePassword.toString().getBytes()));
                userNamePassword.setLength(0);
                userNamePassword.append("Basic ").append(encoding);
                uc.setRequestProperty("Proxy-authorization", userNamePassword.toString());
            }
            return uc;
        } catch (MalformedURLException e) {
        } catch (IOException e) {
        }
        return null;
    }

    /**
     * Get the java.io.InputStream for a URL given a string representing the URL. This class
     * ensures that proxy settings in WSAD are respected.
     * @param urlString String representing the URL.
     * @return java.io.InputStream InputStream for reading the URL stream.
     */
    public static final InputStream getURLInputStream(String urlString) {
        try {
            URLConnection uc = getURLConnection(urlString);
            if (uc != null) {
                InputStream is = uc.getInputStream();
                return is;
            }
        } catch (IOException e) {
        }
        return null;
    }

    /**
     * Create a URL from a string.
     * @param urlString String representing the URL.
     * @return URL java.lang.URL representation of the URL.
     * @throws MalformedURLException
     */
    public static final URL createURL(String urlString) throws MalformedURLException {
        return new URL(urlString);
    }
}