golang base64图片存入服务器

//写入文件,保存
func WriteFile(path string, base64_image_content string) bool {
	b, _ := regexp.MatchString(`^data:\s*image\/(\w+);base64,`, base64_image_content)
	if !b {
		return false
	}
	re, _ := regexp.Compile(`^data:\s*image\/(\w+);base64,`)
	allData := re.FindAllSubmatch([]byte(base64_image_content), 2)
	fileType := string(allData[0][1]) //png ，jpeg 后缀获取

	base64Str := re.ReplaceAllString(base64_image_content, "")

	date := time.Now().Format("20060102")
	if ok := IsFileExist(path + "/" + date); !ok {
		os.Mkdir(path+"/"+date, 0666)
	}

	var file string = path + "/" + date + "/" + strconv.FormatInt(time.Now().Unix(),10) + strconv.Itoa(rand.Intn(999999-100000)+100000) + "." + fileType
	byte, _ := base64.StdEncoding.DecodeString(base64Str)

	err := ioutil.WriteFile(file, byte, 0666)
	if err != nil {
		return false
	}
	return true
}

//判断文件是否存在

func IsFileExist(filename string) bool {
	_, err := os.Stat(filename)
	if os.IsNotExist(err) {
		return false
	}
	return true
}