1, FTP介绍
FTP(File transfer protocol)是一种标准的网络协议，可以用于在互联网上传递文件。SAP系统中提供了一些标准函数，放在函数组SFTP中，
除此之外，sap还提供了一些demo程序：
RSFTP001 - SAPFTP Version (Current Version one is working on)
RSFTP002 - Execute FTP Command
RSFTP003 - FTP put / get Test
RSFTP004 - FTP Copy
RSFTP005 - SAPFTP check
RSFTP006 - FTP command list
RSFTP007 - Test FB:FTP_SERVER_TO_R3 / FTP_R3_TO_SERVER
RSFTP008 - Test FB:FTP_CLIENT_TO_R3 / FTP_R3_TO_CLIENT
RSFTP009 - Test FTP put with Verify
FTP相关一些术语：
USER : 连接FTP服务器的用户名.
PASSWORD ： 密码
HOST ： 需要连接的FTP服务器名字或者是ip地址
RFC Destination ：RFC目标连接名字，通常是SAPFTP，可以通过SM59创建，选择TCP/IP连接
也可以通过执行SAP的标准程序RSFTP005，自动创建两个名为SAPFTP何SAPFTPA的TCP/IP的RFC连接。
HANDLE：可以用来执行FTP命令
2, 相关函数
在函数组SFTP中可以看到常用的一些函数，如下：
'HTTP_SCRAMBLE' "获取加密密码
'FTP_CONNECT' "连接ftp服务器
'FTP_COMMAND' "执行FTP命令
'FTP_SERVER_TO_R3' "拷贝ftp服务器文件到r3
'FTP_COPY' "拷贝文件到指定位置
'FTP_DISCONNECT' "断开FTP连接
'RFC_CONNECTION_CLOSE' "断开RFC链接
3, 例子程序
本例子实现向FTP服务器上传输文件，用到了put命令。
ABAP
REPORT ztest_ftp_sample.
PARAMETERS: p_file TYPE char255 DEFAULT 'dummy.txt',
p_host TYPE char64 DEFAULT 'scnftp.global.xxxx.com',
p_folder TYPE char255 DEFAULT '/jobs_for_test/' LOWER CASE,
p_uname TYPE char30 DEFAULT 'global/xxxxx' LOWER CASE,
p_pwd TYPE char30 DEFAULT 'xxxxxxx' LOWER CASE.
PARAMETERS: dest LIKE rfcdes-rfcdest DEFAULT 'SAPFTP',
compress TYPE c DEFAULT 'N'.
DATA: hdl TYPE i,
key TYPE i VALUE 26101957,
slen TYPE i,
cmd(80) TYPE c.
DATA: BEGIN OF result OCCURS 0,
line(100) TYPE c,
END OF result.
slen = strlen( p_pwd ).
* "获取加密密码 保存到P_PWD
CALL FUNCTION 'HTTP_SCRAMBLE'
EXPORTING
source = p_pwd
sourcelen = slen
key = key
IMPORTING
destination = p_pwd.
* 连接ftp服务器
CALL FUNCTION 'FTP_CONNECT'
EXPORTING
user = p_uname
password = p_pwd
host = p_host
rfc_destination = dest
IMPORTING
handle = hdl. "连接的句柄
"执行FTP命令 CD 打开目标ftp的文件夹
"now open the target ftp folder
concatenate 'cd' p_folder into cmd SEPARATED BY space.
CALL FUNCTION 'FTP_COMMAND'
EXPORTING
handle = hdl
command = cmd
compress = compress
TABLES
data = result
EXCEPTIONS
command_error = 1
tcpip_error = 2.
LOOP AT result.
WRITE AT / result-line.
ENDLOOP.
REFRESH result.
* 打开本地ftp文件夹
"now open the local ftp folder
concatenate 'lcd' 'C:\TEMP\' into cmd SEPARATED BY space.
CALL FUNCTION 'FTP_COMMAND'
EXPORTING
handle = hdl
command = cmd
compress = compress
TABLES
data = result
EXCEPTIONS
command_error = 1
tcpip_error = 2.
LOOP AT result.
WRITE AT / result-line.
ENDLOOP.
REFRESH result.
* 将本地文件放到目标ftp文件夹中
CONCATENATE 'put ' p_file INTO cmd SEPARATED BY space.
CALL FUNCTION 'FTP_COMMAND'
EXPORTING
handle = hdl
command = cmd
compress = compress
TABLES
data = result
EXCEPTIONS
command_error = 1
tcpip_error = 2.
LOOP AT result.
WRITE AT / result-line.
ENDLOOP.
REFRESH result.
* 断开FTP连接
CALL FUNCTION 'FTP_DISCONNECT'
EXPORTING
handle = hdl.
* 断开RFC链接
CALL FUNCTION 'RFC_CONNECTION_CLOSE'
EXPORTING
destination = dest
EXCEPTIONS
OTHERS = 1.
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REPORTztest_ftp_sample.
PARAMETERS:p_fileTYPEchar255DEFAULT'dummy.txt',
p_hostTYPEchar64DEFAULT'scnftp.global.xxxx.com',
p_folderTYPEchar255DEFAULT'/jobs_for_test/'LOWERCASE,
p_unameTYPEchar30DEFAULT'global/xxxxx'LOWERCASE,
p_pwdTYPEchar30DEFAULT'xxxxxxx'LOWERCASE.
PARAMETERS:destLIKErfcdes-rfcdestDEFAULT'SAPFTP',
compressTYPEcDEFAULT'N'.
DATA:hdlTYPEi,
keyTYPEiVALUE26101957,
slenTYPEi,
cmd(80)TYPEc.
DATA:BEGIN OFresultOCCURS0,
line(100)TYPEc,
END OFresult.
slen=strlen(p_pwd).
* "获取加密密码 保存到P_PWD
CALL FUNCTION'HTTP_SCRAMBLE'
EXPORTING
source=p_pwd
sourcelen=slen
key=key
IMPORTING
destination=p_pwd.
* 连接ftp服务器
CALL FUNCTION'FTP_CONNECT'
EXPORTING
user=p_uname
password=p_pwd
host=p_host
rfc_destination=dest
IMPORTING
handle=hdl."连接的句柄
"执行FTP命令 CD 打开目标ftp的文件夹
"now open the target ftp folder
concatenate'cd'p_folderintocmdSEPARATED BYspace.
CALL FUNCTION'FTP_COMMAND'
EXPORTING
handle=hdl
command=cmd
compress=compress
TABLES
data=result
EXCEPTIONS
command_error=1
tcpip_error=2.
LOOP ATresult.
WRITEAT/result-line.
ENDLOOP.
REFRESHresult.
* 打开本地ftp文件夹
"now open the local ftp folder
concatenate'lcd''C:\TEMP\'intocmdSEPARATED BYspace.
CALL FUNCTION'FTP_COMMAND'
EXPORTING
handle=hdl
command=cmd
compress=compress
TABLES
data=result
EXCEPTIONS
command_error=1
tcpip_error=2.
LOOP ATresult.
WRITEAT/result-line.
ENDLOOP.
REFRESHresult.
* 将本地文件放到目标ftp文件夹中
CONCATENATE'put 'p_fileINTOcmdSEPARATED BYspace.
CALL FUNCTION'FTP_COMMAND'
EXPORTING
handle=hdl
command=cmd
compress=compress
TABLES
data=result
EXCEPTIONS
command_error=1
tcpip_error=2.
LOOP ATresult.
WRITEAT/result-line.
ENDLOOP.
REFRESHresult.
* 断开FTP连接
CALL FUNCTION'FTP_DISCONNECT'
EXPORTING
handle=hdl.
* 断开RFC链接
CALL FUNCTION'RFC_CONNECTION_CLOSE'
EXPORTING
destination=dest
EXCEPTIONS
OTHERS=1.
选择画面：
以上。
