FTP 協議命令參數詳解

 
 

若是想本身編寫一個FTP客戶端程序,首先得搞清楚FTP協議中的這些命令和用法。 服務器

FTP COMMANDS 測試

         The following are the FTP commands: spa

            USER <SP> <username> <CRLF>       登陸的用戶名
            PASS <SP> <password> <CRLF>       密碼
            ACCT <SP> <account-information> <CRLF>
            CWD  <SP> <pathname> <CRLF>       改變當前目錄
            CDUP <CRLF>                       返回上級目錄
            SMNT <SP> <pathname> <CRLF>
            QUIT <CRLF>                       退出
            REIN <CRLF>                       從新登陸
            PORT <SP> <host-port> <CRLF>
            PASV <CRLF>                       獲取數據傳輸端口
            TYPE <SP> <type-code> <CRLF>      設置數據交換的類型{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>       用覆蓋方式上傳一個文件到服務器
            STOU <CRLF>
            APPE <SP> <pathname> <CRLF>       用追加方式上傳一個文件到服務器
            ALLO <SP> <decimal-integer>
                [<SP> R <SP> <decimal-integer>] <CRLF>
            REST <SP> <marker> <CRLF>         指定從新下在的字節數
            RNFR <SP> <pathname> <CRLF>       指定須要更名的原文件
            RNTO <SP> <pathname> <CRLF>       指定須要更名的新文件名
            ABOR <CRLF>                       取消前一指令
            DELE <SP> <pathname> <CRLF>       在服務器上刪除指定文件
            RMD  <SP> <pathname> <CRLF>       在服務器上刪除指定目錄
            MKD  <SP> <pathname> <CRLF>       在服務器上建立目錄       
            PWD  <CRLF>                       顯示當前目錄
            LIST [<SP> <pathname>] <CRLF>     列出當前目錄下全部文件和子目錄
            NLST [<SP> <pathname>] <CRLF>     列出當前目錄下全部文件和子目錄的名字
            SITE <SP> <string> <CRLF>
            SYST <CRLF>
            STAT [<SP> <pathname>] <CRLF>
            HELP [<SP> <string>] <CRLF>       獲取幫助
            NOOP <CRLF>
code

FTP Security commands and arguments orm

      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>
ci

      <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
string

   

上面是一些ftp協議支持的命令,下面介紹一些使用實例 it

FTP 協議命令實戰io

 

廢話就很少說了,下面是用TELNET鏈接Serv-U測試成功的例子 base64

下載文件
---------------------------------------------------------------------------
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.

   

覆蓋方式上傳文件
---------------------------------------------------------------------------
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>

...建立另外一條鏈接到指定端口而後向其發送數據...

   

追加方式上傳文件
---------------------------------------------------------------------------
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>

...建立另外一條鏈接到指定端口而後向其發送數據...

   

重命名文件和目錄
---------------------------------------------------------------------------
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.

   

刪除文件
---------------------------------------------------------------------------
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.

   

創建和刪除目錄
---------------------------------------------------------------------------
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.

   

退出鏈接
---------------------------------------------------------------------------
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.

QUIT221 Goodbye!

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