FTP协议的命令的使用

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!