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!

发表于 @ 2008年08月28日 19:54:00|评论(0 )|收藏