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The MockFtpServer project provides mock/dummy FTP server implementations for testing FTP client code. Two FTP Server implementations are provided, each at a different level of abstraction. FakeFtpServer provides a higher-level abstraction. You define a virtual file system, including directories and files, as well as a set of valid user accounts and credentials. The FakeFtpServer then responds with appropriate replies and reply codes based on that configuration. StubFtpServer, on the other hand, is a lower-level "stub" implementation. You configure the individual FTP server commands to return custom data or reply codes, allowing simulation of either success or failure scenarios. You can also verify expected command invocations.

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/*
 * Copyright 2008 the original author or authors.
 *
 * Licensed 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.mockftpserver.fake.command;

import org.mockftpserver.core.command.Command;

/**
 * CommandHandler for the STOU command. Handler logic:
 * 
 * If the user has not logged in, then reply with 530 and terminate
 * Create new unique filename within the current directory
 * If the current user does not have write access to the named file, if it already exists, or else to its
 * parent directory, then reply with 553 and terminate
 * If the current user does not have execute access to the parent directory, then reply with 553 and terminate
 * Send an initial reply of 150
 * Read all available bytes from the data connection and write out to the unique file in the server file system
 * If file write/store fails, then reply with 553 and terminate
 * Send a final reply with 226, along with the new unique filename
 * 
 *
 * @author Chris Mair
 */
public class StouCommandHandler extends AbstractStoreFileCommandHandler {

    /**
     * @return the message key for the reply message sent with the final (226) reply
     */
    protected String getMessageKey() {
        return "stou";
    }

    /**
     * Return the path (absolute or relative) for the output file.
     */
    protected String getOutputFile(Command command) {
        String baseName = defaultIfNullOrEmpty(command.getOptionalString(0), "Temp");
        String suffix = Long.toString(System.currentTimeMillis());
        return baseName + suffix;
    }

}