Java URL to Host Name getHost(String url)

Description

Parses URL and get host from it, if it is possible

License

Open Source License

Parameter

Parameter	Description
url	url to the repository

Return

host if it exists in URL or null if it doesn't.

Declaration

public static String getHost(String url) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2012-2017 Codenvy, S.A.
 * 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:/*  w ww .  j  a  v a 2  s  .  co m*/
 *   Codenvy, S.A. - initial API and implementation
 *******************************************************************************/

import java.net.URI;
import java.util.regex.Pattern;

public class Main {
    public static final Pattern GIT_URL_PATTERN = Pattern.compile("([^\\\\/@:]+@[^\\\\/@:]+)(:|/)[^\\\\@:]+");

    /**
     * Parses URL and get host from it, if it is possible
     *
     * @param url
     *         url to the repository
     * @return host if it exists in URL or <code>null</code> if it doesn't.
     */
    public static String getHost(String url) {
        if (url.contains("://")) {
            /*
            Host between ("://" or "@") and (":" or "/")
            for ssh or git Schema uri.
            ssh://user@host.com/some/path
            ssh://host.com/some/path
            git://host.com/user/repo
            can be with port
            ssh://host.com:port/some/path
             */
            URI uri = URI.create(url);
            return uri.getHost();
        } else if (GIT_URL_PATTERN.matcher(url).matches()) {
            /*
            Host between "@" and ":"
            user@host.com:login/repo
             */
            return url.substring(url.indexOf("@") + 1, url.indexOf(":"));
        } else {
            return null;
        }
    }
}

Related

1. getHost(String url)
2. getHost(String url)
3. getHost(String url)
4. getHost(String url)
5. getHost(String urlString)
6. getHost(String urlString)
7. getHost(URL url)
8. getHostAddressAsBytes(String url)