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  • FTP 协议命令参数详解

     
     

    如果想自己编写一个FTP客户端程序,首先得搞清楚FTP协议中的这些命令和用法。

    FTP COMMANDS

             The following are the FTP commands:

                USER <SP> <username> <CRLF>       登录的用户名
                PASS <SP> <password> <CRLF>       密码
                ACCT <SP> <account-information> <CRLF>
                CWD  <SP> <pathname> <CRLF>       改变当前目录
                CDUP <CRLF>                       返回上级目录
                SMNT <SP> <pathname> <CRLF>
                QUIT <CRLF>                       退出
                REIN <CRLF>                       重新登录
                PORT <SP> <host-port> <CRLF>
                PASV <CRLF>                       获取数据传输端口
                TYPE <SP> <type-code> <CRLF>      设置数据交换的类型{A(SCII),E(BCDIC),I(mage),L(ocal byte size)}
                STRU <SP> <structure-code> <CRLF>
                MODE <SP> <mode-code> <CRLF>
                RETR <SP> <pathname> <CRLF>
                STOR <SP> <pathname> <CRLF>       用覆盖方式上传一个文件到服务器
                STOU <CRLF>
                APPE <SP> <pathname> <CRLF>       用追加方式上传一个文件到服务器
                ALLO <SP> <decimal-integer>
                    [<SP> R <SP> <decimal-integer>] <CRLF>
                REST <SP> <marker> <CRLF>         指定重新下在的字节数
                RNFR <SP> <pathname> <CRLF>       指定需要改名的原文件
                RNTO <SP> <pathname> <CRLF>       指定需要改名的新文件名
                ABOR <CRLF>                       取消前一指令
                DELE <SP> <pathname> <CRLF>       在服务器上删除指定文件
                RMD  <SP> <pathname> <CRLF>       在服务器上删除指定目录
                MKD  <SP> <pathname> <CRLF>       在服务器上创建目录       
                PWD  <CRLF>                       显示当前目录
                LIST [<SP> <pathname>] <CRLF>     列出当前目录下所有文件和子目录
                NLST [<SP> <pathname>] <CRLF>     列出当前目录下所有文件和子目录的名字
                SITE <SP> <string> <CRLF>
                SYST <CRLF>
                STAT [<SP> <pathname>] <CRLF>
                HELP [<SP> <string>] <CRLF>       获取帮助
                NOOP <CRLF>

    FTP Security commands and arguments

          AUTH <SP> <mechanism-name> <CRLF>
          ADAT <SP> <base64data> <CRLF>
          PROT <SP> <prot-code> <CRLF>
          PBSZ <SP> <decimal-integer> <CRLF>
          MIC <SP> <base64data> <CRLF>
          CONF <SP> <base64data> <CRLF>
          ENC <SP> <base64data> <CRLF>

          <mechanism-name> ::= <string>
          <base64data> ::= <string>
                  ; must be formatted as described in section 9
          <prot-code> ::= C | S | E | P
          <decimal-integer> ::= any decimal integer from 1 to (2^32)-1

       

    上面是一些ftp协议支持的命令,下面介绍一些使用实例

    FTP 协议命令实战

     

    废话就不多说了,下面是用TELNET连接Serv-U测试成功的例子

    下载文件
    ---------------------------------------------------------------------------
    TELNET 127.0.0.1 21
    220 Serv-U FTP Server v4.0 for WinSock ready...

    USER ADMIN
    331 User name okay, need password.

    PASS ****
    230 User logged in, proceed.

    PASV
    227 Entering Passive Mode <127,0,0,1,4,191>

    REST 0
    350 Restarting at 0. Send STORE or RETRIEVE.

    RETR test.rar
    150 Opening ASCII mode data connection for test.rar <94370 bytes>.
    226 Transfer complete.

       

    覆盖方式上传文件
    ---------------------------------------------------------------------------
    TELNET 127.0.0.1 21
    220 Serv-U FTP Server v4.0 for WinSock ready...

    USER ADMIN
    331 User name okay, need password.

    PASS ****
    230 User logged in, proceed.

    STOR test.dat
    150 Opening ASCII mode data connection for test.dat

    PASV
    227 Entering Passive Mode <127,0,0,1,4,191>

    ...创建另一条连接到指定端口然后向其发送数据...

       

    追加方式上传文件
    ---------------------------------------------------------------------------
    TELNET 127.0.0.1 21
    220 Serv-U FTP Server v4.0 for WinSock ready...

    USER ADMIN
    331 User name okay, need password.

    PASS ****
    230 User logged in, proceed.

    APPE test.dat
    150 Opening ASCII mode data connection for test.dat

    PASV
    227 Entering Passive Mode <127,0,0,1,4,191>

    ...创建另一条连接到指定端口然后向其发送数据...

       

    重命名文件和目录
    ---------------------------------------------------------------------------
    TELNET 127.0.0.1 21
    220 Serv-U FTP Server v4.0 for WinSock ready...

    USER ADMIN
    331 User name okay, need password.

    PASS ****
    230 User logged in, proceed.

    RNFR sss.rar
    350 File or directory exists; ready for destination name

    RNTO stock.rar
    250 RNTO command successfull.

       

    删除文件
    ---------------------------------------------------------------------------
    TELNET 127.0.0.1 21
    220 Serv-U FTP Server v4.0 for WinSock ready...

    USER ADMIN
    331 User name okay, need password.

    PASS ****
    230 User logged in, proceed.

    DELE test.dat
    250 DELE command successfull.

       

    建立和删除目录
    ---------------------------------------------------------------------------
    TELNET 127.0.0.1 21
    220 Serv-U FTP Server v4.0 for WinSock ready...

    USER ADMIN
    331 User name okay, need password.

    PASS ****
    230 User logged in, proceed.

    MKD myDir
    257 "/myDir" directory created.

    RMD myDir
    250 RMD command successfull.

       

    退出连接
    ---------------------------------------------------------------------------
    TELNET 127.0.0.1 21
    220 Serv-U FTP Server v4.0 for WinSock ready...

    USER ADMIN
    331 User name okay, need password.

    PASS ****
    230 User logged in, proceed.

    QUIT
    221 Goodbye!

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  • 原文地址:https://www.cnblogs.com/Alum/p/3929767.html
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