úÎ È XFile range for sendfile. (Simple binding for sendfile() of Linux.  Used system calls: 7 EntireFile -- open(), stat(), sendfile(), and close() 5 - PartOfFile -- open(), sendfile(), and close() AIf the size of the file is unknown when sending the entire file, ) specifying PartOfFile is much faster. DThe fourth action argument is called when a file is sent as chunks. E Chucking is inevitable if the socket is non-blocking (this is the F default) and the file is large. The action is called after a chunk B is sent and bofore waiting the socket to be ready for writing.    simple-sendfile-0.1.2Network.SendfileNetwork.Sendfile.TypesNetwork.Sendfile.Linux FileRange PartOfFile rangeOffset rangeLength EntireFilesendfile c_sendfilesendPart