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/FTPSCommand.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;

/**
 * FTPS-specific commands.
 * @since 2.0
 * @deprecated 3.0 DO NOT USE
 */
@Deprecated
public final class FTPSCommand {
    public static final int AUTH = 0;
    public static final int ADAT = 1;
    public static final int PBSZ = 2;
    public static final int PROT = 3;
    public static final int CCC = 4;

    public static final int AUTHENTICATION_SECURITY_MECHANISM = AUTH;
    public static final int AUTHENTICATION_SECURITY_DATA = ADAT;
    public static final int PROTECTION_BUFFER_SIZE = PBSZ;
    public static final int DATA_CHANNEL_PROTECTION_LEVEL = PROT;
    public static final int CLEAR_COMMAND_CHANNEL = CCC;

    private static final String[] commands = {"AUTH","ADAT","PBSZ","PROT","CCC"};

    /**
     * Retrieve the FTPS command string corresponding to a specified
     * command code.
     *
     * @param command The command code.
     * @return The FTPS command string corresponding to a specified
     *  command code.
     */
    public static String getCommand(final int command) {
        return commands[command];
    }
}

⏎ org/apache/commons/net/ftp/FTPSCommand.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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