How do you upload a file to multiple destination at once?
I’ll introduce to you guys Golang IO pipeline and IO copier to do that
io.Pipe
Go io Pipe make a “pipe” that wrote into writer will come out at reader
reader, writer := io.Pipe()Broadcaster
Linked channel broadcaster can be found at https://github.com/hauxe/GoM/tree/master/broadcast
broadcaster := broadcast.NewBroadcaster()We will broad cast to file and stdout, so create two listener for broadcaster
fileComsumer, err := broadcaster.Listen()if err != nil { panic(err)}stdoutComsumer, err := broadcaster.Listen()if err != nil { panic(err)}
io.TeeReader
In write function we use TeeReader to write to destination and take a copy of reader to broadcast to next listener
Note that you must perform a final read on final TeeReader to trigger the io pipeline
Full working codes:
