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Java example source code file (StrictHostnameVerifier.java)

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

Java tags/keywords

abstractverifier, immutable, net, override, ssl, sslexception, strict, stricthostnameverifier, string

The StrictHostnameVerifier.java example source code

 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * ====================================================================
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.

package org.apache.http.conn.ssl;

import javax.net.ssl.SSLException;

import org.apache.http.annotation.Immutable;

 * The Strict HostnameVerifier works the same way as Sun Java 1.4, Sun
 * Java 5, Sun Java 6-rc.  It's also pretty close to IE6.  This
 * implementation appears to be compliant with RFC 2818 for dealing with
 * wildcards.
 * <p/>
 * The hostname must match either the first CN, or any of the subject-alts.
 * A wildcard can occur in the CN, and in any of the subject-alts.  The
 * one divergence from IE6 is how we only check the first CN.  IE6 allows
 * a match against any of the CNs present.  We decided to follow in
 * Sun Java 1.4's footsteps and only check the first CN.  (If you need
 * to check all the CN's, feel free to write your own implementation!).
 * <p/>
 * A wildcard such as "*.foo.com" matches only subdomains in the same
 * level, for example "a.foo.com".  It does not match deeper subdomains
 * such as "a.b.foo.com".
 * @since 4.0
public class StrictHostnameVerifier extends AbstractVerifier {

    public final void verify(
            final String host, 
            final String[] cns,
            final String[] subjectAlts) throws SSLException {
        verify(host, cns, subjectAlts, true);

    public final String toString() { 
        return "STRICT"; 

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