Setting read/write deadlines

If you do not want to wait indefinitely for a connected host to send data, or for the connected host to receive the data you sent, you have to set a deadline.

How to do it...

Depending on your specific protocol, you can set read or write deadlines, and you may choose to set these deadlines for individual I/O operations, or globally:

1. Set the deadline before the operation:

   conn.SetDeadline(time.Now().Add(timeoutSeconds * timeSecond))
   if n, err:=conn.Read(data); err!=nil {
     if errors.Is(err, os.ErrDeadlineExceeded) {
       // Deadline exceeded.
     } else {
       // Some other error
     }
   }

2. If you will continue using the connection after a deadline is exceeded, you have to reset the deadline:

   conn.SetDeadline(time.Time{})

Or, set a new deadline with a time in the future.