package util

import (
	"crypto/sha256"
	"fmt"
	"io"
	"os"
)

// 计算文件的hash
func CalacHash(rfile string) string {
	// 获取到真实地址
	//
	file, err := os.Open(rfile)
	if err != nil {
		panic(err)
	}
	defer file.Close()

	// initlize hash object
	hash := sha256.New()

	// write file into hash object
	if _, err := io.Copy(hash, file); err != nil {
		panic(err)
	}
	// get hash value
	hashBytes := hash.Sum(nil)
	//converto to hash string
	hastString := fmt.Sprintf("%x", hashBytes)
	return hastString
}