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file.go
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/
file.go
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package utils
import (
"bytes"
"encoding/base64"
"io"
"net/http"
"os"
"strings"
)
// CheckFolderExists 检查文件夹是否存在,如果不存在则创建
func CheckFolderExists(path string) error {
_, err := os.Stat(path)
if err != nil {
if os.IsNotExist(err) {
if err := os.MkdirAll(path, os.ModePerm); err != nil {
return err
}
return nil
}
return err
}
return nil
}
// CheckPathExists 判断文件/文件夹是否存在
func CheckPathExists(path string) bool {
_, err := os.Stat(path)
if err == nil {
return true
}
if os.IsNotExist(err) {
return false
}
return false
}
// Base64ToImage base64转图片
// b64Str base64字符串
// dst 图片保存路径
func Base64ToImage(b64Str, dst string) error {
imgByte, err := base64.StdEncoding.DecodeString(b64Str)
if err != nil {
return err
}
file, err := os.Create(dst)
if err != nil {
return err
}
defer file.Close()
_, err = io.Copy(file, bytes.NewReader(imgByte))
if err != nil {
return err
}
return nil
}
// IsImageFile 判断文件是否存在,如果存在是否为图片类型
func IsImageFile(path string) bool {
if !CheckPathExists(path) {
return false
}
file, err := os.Open(path)
if err != nil {
return false
}
defer file.Close()
buff := make([]byte, 512)
_, err = file.Read(buff)
if err != nil {
return false
}
fileType := http.DetectContentType(buff)
if strings.Contains(fileType, "image") {
return true
}
return false
}