first version

module/image/image.go

@@ -0,0 +1,40 @@
+package image
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"path"
+	"time"
+
+	"image/png"
+
+	"git.trj.tw/golang/go-watch-webp/module/config"
+	"golang.org/x/image/webp"
+)
+
+// ConvertToPng -
+func ConvertToPng(file io.Reader) error {
+	log.Println("convert func ")
+	conf := config.GetConfig()
+
+	webpImg, err := webp.Decode(file)
+	if err != nil {
+		return err
+	}
+
+	filename := fmt.Sprintf("%d.png", time.Now().UnixNano())
+	fp := path.Join(conf.Dist, filename)
+
+	target, err := os.Create(fp)
+	if err != nil {
+		return err
+	}
+
+	if err := png.Encode(target, webpImg); err != nil {
+		return err
+	}
+
+	return nil
+}