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FTP协议的命令的使用(转)

2011-12-06 20:27 393 查看

FTP 协议命令

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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