sillygod/cdp-cache

package helper

import (
    "net"
    "strings"
)

var LogUTCTimeFormat = "2006/01/02 15:04:05"

// IPAddr get the local node's ip address
func IPAddr() (net.IP, error) {
    addrs, err := net.InterfaceAddrs()
    if err != nil {
        return nil, err
    }

    for _, addr := range addrs {
        if ipnet, ok := addr.(*net.IPNet); ok && ipnet.IP.IsGlobalUnicast() {
            if ipnet.IP.To4() != nil || ipnet.IP.To16() != nil {
                return ipnet.IP, nil
            }
        }
    }
    return nil, nil
}

// TrimBy trims the string with provided substring and repeat
// it multiple times decided by the count.
// ex.
// TrimBy("/localhost/caches/abc.txt", "/", 2)
// will get "caches/abc.txt"
func TrimBy(str, substr string, count int) string {
    tmp := 0

    for {
        if tmp == count {
            break
        }

        index := strings.Index(str, substr)
        str = str[index+1:]
        tmp++
    }

    return str
}