The following figure shows the flow of file transfer using FTP:

Figure 2-63 Flow of file transfer using FTP

Steps from 1 to 3 are as follows:

1. Request reception from FTP client
   FTP inbound adapter and FTP reception are used to receive file transfer requests from FTP client. Processes such as FTP client authentication, file transfer process are performed in FTP inbound adapter. File transfer requests from FTP client are sent to FTP reception through FTP inbound adapter. After that, the business process is invoked from FTP reception.
   Files are sent and received using the working folder in HCSC server created by FTP reception.
   
2. Transforming, duplicating and deleting data in files
   If the file formats of the sending side and receiving side are different, use the file operations adapter to transform file layout and the character code.
   File operations adapter accesses the working folder and other folders on HCSC server and performs operations such as duplication and deletion of files between folders, deletion of working folders.
   File operations adapter is invoked from the business process.
   
3. Connecting to FTP server
   Use FTP adapter to connect to FTP server and for file transfer between the working folder and FTP server.
   FTP adapter is invoked from the business process.