Go: What's the best way to detect invalid JSON string characters?

Question

What's the best, most efficient way to detect whether a Go string contains characters that are invalid in JSON strings? In other words, what's the Go equivalent to this answer to this Java question? Is it just to use strings.ContainsAny (assuming the ASCII control characters)?

ctlChars := string([]byte{
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
    19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 127,
})
if strings.ContainsAny(str, ctlChars) {
    println("has control chars")
}

Answer 1

If you are looking to identify control characters (as in the answers to the Java question you pointed to), you might want to use unicode.IsControl for a simpler solution.

https://golang.org/pkg/unicode/#IsControl

func containsControlChar(s string) bool {
    for _, c := range s {
        if unicode.IsControl(c) {
            return true
        }
    }
    return false
}

Playground: https://play.golang.org/p/Pr_9mmt-th