SFTP（SAP FTP）：函数组说明：本函数组中的函数包括一些 FTP 和 HTTP 操作所用的函数。
FTP_CLIENT_TO_R3
FTP_COMMAND Execute FTP Command
FTP_COMMAND_LIST
FTP_CONNECT Connect to FTP server
FTP_COPY FTP Copy
FTP_DISCONNECT Disconnect from FTP server
FTP_R3_TO_CLIENT
FTP_R3_TO_SERVER
FTP_SERVER_TO_R3
FTP_START_REG_SERVER
FTP_START_SAPFTP
FTP_STOP_REG_SERVER
FTP_VERSION Procure SAPFTP version
HTTP_BASE64_ENCODE base64 encode string
HTTP_GET HTTP Get
HTTP_GET_FILE HTTP Get File
HTTP_GET_FILES HTTP Get Files
HTTP_GET_FILES_255 HTTP Get Files
HTTP_GET_FILE_DP HTTP Get File
HTTP_POST HTTP post
HTTP_POST_DOCUMENT
HTTP_POST_DOCUMENTS
HTTP_POST_DOCUMENT_255
HTTP_POST_FILES HTTP Post Files
HTTP_POST_FILES_255 HTTP Post Files
HTTP_PROXY_CONFIG
HTTP_PUT_COMPONENT
HTTP_PUT_FILE
HTTP_PUT_FILE_DP
HTTP_SCRAMBLE
HTTP_VERSION Procure SAPHTTP version
