Java example source code file (PlainSocketFactory.java)

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Java tags/keywords

connecttimeoutexception, default_factory, hostnameresolver, httpparams, illegalargumentexception, inetaddress, inetsocketaddress, io, ioexception, net, network, parameters, plainsocketfactory, socket, sockettimeoutexception, string, target

The PlainSocketFactory.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
 * "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.
 * ====================================================================
 *
 * 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.scheme;

import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketTimeoutException;

import org.apache.http.annotation.Immutable;

import org.apache.http.conn.ConnectTimeoutException;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;

/**
 * The default class for creating plain (unencrypted) sockets.
 * <p>
 * The following parameters can be used to customize the behavior of this 
 * class: 
 * <ul>
 *  <li>{@link org.apache.http.params.CoreConnectionPNames#CONNECTION_TIMEOUT}
 * </ul>
 *
 * @since 4.0
 */
@Immutable
public final class PlainSocketFactory implements SocketFactory {

    /**
     * The default factory.
     */
    private static final
        PlainSocketFactory DEFAULT_FACTORY = new PlainSocketFactory();

    private final HostNameResolver nameResolver;
    
    /**
     * Gets the default factory. Usually there should be no reason for creating 
     * multiple instances of this class.
     * 
     * @return the default factory
     */
    public static PlainSocketFactory getSocketFactory() {
        return DEFAULT_FACTORY;
    }

    public PlainSocketFactory(final HostNameResolver nameResolver) {
        super();
        this.nameResolver = nameResolver;
    }


    public PlainSocketFactory() {
        this(null);
    }

    public Socket createSocket() {
        return new Socket();
    }

    public Socket connectSocket(Socket sock, String host, int port, 
                                InetAddress localAddress, int localPort,
                                HttpParams params)
        throws IOException {

        if (host == null) {
            throw new IllegalArgumentException("Target host may not be null.");
        }
        if (params == null) {
            throw new IllegalArgumentException("Parameters may not be null.");
        }

        if (sock == null)
            sock = createSocket();

        if ((localAddress != null) || (localPort > 0)) {

            // we need to bind explicitly
            if (localPort < 0)
                localPort = 0; // indicates "any"

            InetSocketAddress isa =
                new InetSocketAddress(localAddress, localPort);
            sock.bind(isa);
        }

        int timeout = HttpConnectionParams.getConnectionTimeout(params);

        InetSocketAddress remoteAddress;
        if (this.nameResolver != null) {
            remoteAddress = new InetSocketAddress(this.nameResolver.resolve(host), port); 
        } else {
            remoteAddress = new InetSocketAddress(host, port);            
        }
        try {
            sock.connect(remoteAddress, timeout);
        } catch (SocketTimeoutException ex) {
            throw new ConnectTimeoutException("Connect to " + remoteAddress + " timed out");
        }
        return sock;
    }

    /**
     * Checks whether a socket connection is secure.
     * This factory creates plain socket connections
     * which are not considered secure.
     *
     * @param sock      the connected socket
     *
     * @return  <code>false
     *
     * @throws IllegalArgumentException if the argument is invalid
     */
    public final boolean isSecure(Socket sock)
        throws IllegalArgumentException {

        if (sock == null) {
            throw new IllegalArgumentException("Socket may not be null.");
        }
        // This check is performed last since it calls a method implemented
        // by the argument object. getClass() is final in java.lang.Object.
        if (sock.isClosed()) {
            throw new IllegalArgumentException("Socket is closed.");
        }
        return false;
    }

}