/**
* Copyright 2010 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.waveprotocol.box.server.util;
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
/**
* Networking utility methods.
*
* @author soren@google.com (Soren Lassen)
*/
public class NetUtils {
/** Default port number for HTTP server addresses. */
public static final short HTTP_DEFAULT_PORT = 80;
/**
* Parses a string of format "host[:port]" into a InetSocketAddress.
* The port defaults to HTTP_DEFAULT_PORT.
*/
public static InetSocketAddress parseHttpAddress(String address) throws IOException {
String[] parts = address.split(":");
if (parts.length < 1) {
throw new IOException("Empty address");
}
if (parts.length > 2) {
throw new IOException("Too many colons");
}
String host = parts[0];
short port = HTTP_DEFAULT_PORT;
if (parts.length == 2) {
try {
port = Short.parseShort(parts[1]);
if (port <= 0) {
throw new IOException("Invalid port number: " + parts[1]);
}
} catch (NumberFormatException e) {
throw new IOException("Invalid port number: " + parts[1], e);
}
}
InetAddress addr = InetAddress.getByName(host);
return new InetSocketAddress(addr, port);
}
private NetUtils() { } // prevents instantiation
}