netutils.java

aglet的部分源码

package com.ibm.agletx.patterns;

/*
 * @(#)NetUtils.java
 * 
 * IBM Confidential-Restricted
 * 
 * OCO Source Materials
 * 
 * 03L7246 (c) Copyright IBM Corp. 1996, 1998
 * 
 * The source code for this program is not published or otherwise
 * divested of its trade secrets, irrespective of what has been
 * deposited with the U.S. Copyright Office.
 */

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

public class NetUtils {

	static public int getDefaultPort(String protocol) {
		if ("http".equals(protocol)) {
			return 80;
		} else if ("atp".equals(protocol)) {
			return 4434;
		} else if ("smtp".equals(protocol)) {
			return 25;
		} else if ("ftp".equals(protocol)) {
			return 21;
		} 
		return -1;
	}
	static public void main(String arg[]) throws java.io.IOException {
		System.out.println(sameURL(new URL("http://test/foo"), 
								   new URL("http://test:80/foo")));
		System.out.println(sameURL(new URL("http://test.trl.ibm.com/foo"), 
								   new URL("http://test:80/foo")));
		System.out.println(sameURL(new URL("http://test"), 
								   new URL("http://test/")));
		System.out.println(sameURL(new URL("http://test"), 
								   new URL("http://test/foo")));
	}
	static public boolean sameURL(URL u1, URL u2) {
		if (u1 == null || u2 == null) {
			return false;
		} 
		String u1_protocol = u1.getProtocol();
		String u2_protocol = u2.getProtocol();

		int u1_port = u1.getPort() == -1 ? getDefaultPort(u1_protocol) 
					  : u1.getPort();
		int u2_port = u2.getPort() == -1 ? getDefaultPort(u2_protocol) 
					  : u2.getPort();

		return (u1_protocol.equals(u2_protocol) 
				&& u1.getHost().equals(u2.getHost()) && u1_port == u2_port 
				&& u1.getFile().equals(u2.getFile()));
	}
}