Question

我正在尝试用Java编写FTP服务器，并且基本功能已关闭，但我无法弄清楚或找到有关LIST命令的任何信息。

LIST -a会发送一个文件列表，例如

drwxrwxrwx 1 stefan stefan             0 Jan  1  1970 personaluploads
-rwxrwxrwx 1 stefan stefan             0 Jan  1  1970 serverflags.txt
-rwxrwxrwx 1 stefan stefan             0 Jan  1  1970 serveroptions.txt
-rwxrwxrwx 1 stefan stefan             0 Jan  1  1970 levels_npcserver.txt

通过数据连接。

我应该只用LIST返回什么？我是通过数据连接还是控制连接发送的？

感谢您的帮助。

Answer 1

见RFC 959 - File Transfer Protocol。它拥有您需要的所有信息。

LIST (LIST)

            This command causes a list to be sent from the server to the
            passive DTP.  If the pathname specifies a directory or other
            group of files, the server should transfer a list of files
            in the specified directory.  If the pathname specifies a
            file then the server should send current information on the
            file.  A null argument implies the user's current working or
            default directory.  The data transfer is over the data
            connection in type ASCII or type EBCDIC.  (The user must
            ensure that the TYPE is appropriately ASCII or EBCDIC).
            Since the information on a file may vary widely from system
            to system, this information may be hard to use automatically
            in a program, but may be quite useful to a human user.

FTP LIST命令响应

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