Golang os.stdin作为Goroutines中的阅读器

Question

Is it okay to use os.stdin as a Reader in a Goroutine? Basically what I would like to accomplish is to enable the user to enter a message without blocking the main thread.

Example:

go func() {
    for {
        consolereader := bufio.NewReader(os.Stdin)

        input, err := consolereader.ReadString('
') // this will prompt the user for input

        if err != nil {
             fmt.Println(err)
             os.Exit(1)
        }

        fmt.Println(input)
    }
}()

Answer 1

Yes, this is perfectly fine. So long as this is the only goroutine that is interacting with os.Stdin, everything will work properly.

By the way, you may want to use bufio.Scanner - it's a bit nicer to work with than bufio.Reader:

go func() {
    consolescanner := bufio.NewScanner(os.Stdin)

    // by default, bufio.Scanner scans newline-separated lines
    for consolescanner.Scan() {
        input := consolescanner.Text()
        fmt.Println(input)
    }

    // check once at the end to see if any errors
    // were encountered (the Scan() method will
    // return false as soon as an error is encountered) 
    if err := consolescanner.Err(); err != nil {
         fmt.Println(err)
         os.Exit(1)
    }
}()