FTP协议的命令的使用(转)
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
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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
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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
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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
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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
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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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