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qrcode.go
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qrcode.go
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package qrcode
import (
"crypto/md5"
"encoding/hex"
"image/jpeg"
"os"
"github.com/boombuler/barcode"
"github.com/boombuler/barcode/qr"
)
type QrCode struct {
URL string
Width int
Height int
Ext string
Level qr.ErrorCorrectionLevel
Mode qr.Encoding
}
const (
EXT_JPG = ".jpg"
)
func NewQrCode(url string, width, height int, level qr.ErrorCorrectionLevel, mode qr.Encoding) *QrCode {
return &QrCode{
URL: url,
Width: width,
Height: height,
Level: level,
Mode: mode,
Ext: EXT_JPG,
}
}
/*func GetQrCodePath() string {
return initialize.Config.Server.QrCodeSavePath
}
func GetQrCodeFullPath() string {
return initialize.Config.Server.RuntimeRootPath + initialize.Config.Server.QrCodeSavePath
}
func GetQrCodeFullUrl(name string) string {
return initialize.Config.Server.PrefixUrl + "/" + GetQrCodePath() + name
}*/
func GetQrCodeFileName(value string) string {
m := md5.New()
m.Write([]byte(value))
return hex.EncodeToString(m.Sum(nil))
}
func (q *QrCode) GetQrCodeExt() string {
return q.Ext
}
func (q *QrCode) CheckEncode(path string) bool {
src := path + GetQrCodeFileName(q.URL) + q.GetQrCodeExt()
_, err := os.Stat(src)
return !os.IsNotExist(err)
}
func (q *QrCode) Encode(path string) (string, string, error) {
name := GetQrCodeFileName(q.URL) + q.GetQrCodeExt()
src := path + name
_, err := os.Stat(src)
if os.IsNotExist(err) == true {
code, err := qr.Encode(q.URL, q.Level, q.Mode)
if err != nil {
return "", "", err
}
code, err = barcode.Scale(code, q.Width, q.Height)
if err != nil {
return "", "", err
}
f, err := os.Open(path + name)
if err != nil {
return "", "", err
}
defer f.Close()
err = jpeg.Encode(f, code, nil)
if err != nil {
return "", "", err
}
}
return name, path, nil
}