[code=golang]
import (
	"crypto/sha512"
	"encoding/base64"
	"strings"
)

func hashMiaoSpeed(token, request string) string {
	buildTokens := append([]string{token}, strings.Split(strings.TrimSpace(BUILDTOKEN), "|")...)

	hasher := sha512.New()
	hasher.Write([]byte(request))

	for _, t := range buildTokens {
		if t == "" {
			// unsafe, please make sure not to let token segment be empty
			t = "SOME_TOKEN"
		}

		hasher.Write(hasher.Sum([]byte(t)))
	}

	return base64.URLEncoding.EncodeToString(hasher.Sum(nil))
}
[/code]