commons-net.jar is the bytecode of Apache Commons Net library, which implements the client side of many basic Internet protocols.

Apache Commons Net Source Code files are provided in the binary packge (commons-net-3.8.0-bin.zip). You can download it at Apache Commons Net Website.

The source code of commons-net-3.8.0.jar is provided below:

⏎ org/apache/commons/net/ftp/FTPSSocketFactory.java

/*
 * 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.
 */

package org.apache.commons.net.ftp;

import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

import javax.net.SocketFactory;
import javax.net.ssl.SSLContext;

/**
 *
 * Socket factory for FTPS connections.
 *
 * @since 2.0
 */
public class FTPSSocketFactory extends SocketFactory {

    private final SSLContext context;

    public FTPSSocketFactory(final SSLContext context) {
        this.context = context;
    }

    // Override the default implementation
    @Override
    public Socket createSocket() throws IOException{
        return this.context.getSocketFactory().createSocket();
    }

    @Override
    public Socket createSocket(final String address, final int port) throws UnknownHostException, IOException {
        return this.context.getSocketFactory().createSocket(address, port);
    }

    @Override
    public Socket createSocket(final InetAddress address, final int port) throws IOException {
        return this.context.getSocketFactory().createSocket(address, port);
    }

    @Override
    public Socket createSocket(final String address, final int port, final InetAddress localAddress, final int localPort)
            throws UnknownHostException, IOException {
        return this.context.getSocketFactory().createSocket(address, port, localAddress, localPort);
    }

    @Override
    public Socket createSocket(final InetAddress address, final int port, final InetAddress localAddress,
            final int localPort) throws IOException {
        return this.context.getSocketFactory().createSocket(address, port, localAddress, localPort);
    }

    // DEPRECATED METHODS - for API compatibility only - DO NOT USE

    /** @param port the port
     * @return  the socket
     * @throws IOException on error
     * @deprecated (2.2) use {@link FTPSServerSocketFactory#createServerSocket(int) instead} */
    @Deprecated
    public java.net.ServerSocket createServerSocket(final int port) throws IOException {
        return this.init(this.context.getServerSocketFactory().createServerSocket(port));
    }

    /** @param port  the port
     * @param backlog the backlog
     * @return  the socket
     * @throws IOException  on error
     * @deprecated  (2.2) use {@link FTPSServerSocketFactory#createServerSocket(int, int) instead} */
    @Deprecated
    public java.net.ServerSocket createServerSocket(final int port, final int backlog) throws IOException {
        return this.init(this.context.getServerSocketFactory().createServerSocket(port, backlog));
    }

    /** @param port  the port
     * @param backlog the backlog
     * @param ifAddress the interface
     * @return  the socket
     * @throws IOException  on error
     * @deprecated  (2.2) use {@link FTPSServerSocketFactory#createServerSocket(int, int, InetAddress) instead} */
    @Deprecated
    public java.net.ServerSocket createServerSocket(final int port, final int backlog, final InetAddress ifAddress)
            throws IOException {
        return this.init(this.context.getServerSocketFactory().createServerSocket(port, backlog, ifAddress));
    }

    /** @param socket the socket
     * @return the socket
     * @throws IOException  on error
     * @deprecated  (2.2) use {@link FTPSServerSocketFactory#init(java.net.ServerSocket)} */
    @Deprecated
    public java.net.ServerSocket init(final java.net.ServerSocket socket) throws IOException {
        ((javax.net.ssl.SSLServerSocket) socket).setUseClientMode(true);
        return socket;
    }

}

⏎ org/apache/commons/net/ftp/FTPSSocketFactory.java

Or download all of them as a single archive file:

File name: commons-net-3.8.0-sources.jar
File size: 437325 bytes
Release date: 2020-01-22
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