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
32
33
34
35
36
37
38
|
package main
import (
"errors"
"fmt"
"net"
"os"
"github.com/cqroot/prompt"
"github.com/cqroot/prompt/input"
)
var ErrInvalidIP = errors.New("invalid ip")
func validateIP(ip string) error {
if net.ParseIP(ip) == nil {
return fmt.Errorf("%s: %w", ip, ErrInvalidIP)
} else {
return nil
}
}
func main() {
val, err := prompt.New().Ask("Please enter the server IP:").
Input("127.0.0.1", input.WithValidateFunc(validateIP))
if err != nil {
if errors.Is(err, prompt.ErrUserQuit) {
fmt.Fprintln(os.Stderr, "Error:", err)
os.Exit(1)
} else if errors.Is(err, ErrInvalidIP) {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
} else {
panic(err)
}
}
fmt.Println(val)
}
|
