paths safeguard

blend.go

@@ -8,6 +8,7 @@ import (
 	"log"
 	"math"
 	"os"
+	"path"
 )
 
 // convert RGBA pixel to grayscale. BT.709 luminosity formula
@@ -115,7 +116,7 @@ func blendColor(color1 color.Color, color2 color.Color) color.Color {
 
 // encode the image
 func encodeImage(imgData *image.RGBA) {
-	outputFile := fmt.Sprintf("%s/%s", ConfigRegister.OutputDir, "output.jpg")
+	outputFile := fmt.Sprintf("%s/%s", path.Clean(ConfigRegister.OutputDir), "output.jpg")
 	out, _ := os.Create(outputFile)
 	defer out.Close()
 	log.Println("Encoding the new image...")