feat: add working watchdog cycle

internal/crypto/crypto.go

@@ -4,24 +4,23 @@ import (
 	"crypto/sha512"
 	"encoding/hex"
 	"io"
-	"os"
+	"mime/multipart"
 )
 
-func CalculateHash(p string) (string, error) {
-	f, err := os.Open(p)
+func CalculateHashFromRequest(fileHeader *multipart.FileHeader) (string, error) {
+	src, err := fileHeader.Open()
 	if err != nil {
 		return "", err
 	}
-	defer f.Close()
+	defer src.Close()
 
 	h := sha512.New()
-	if _, err := io.Copy(h, f); err != nil {
+	if _, err := io.Copy(h, src); err != nil {
 		return "", err
 	}
 
-	sum := h.Sum(nil)
 	// return the sha checksum in hex
-	return hex.EncodeToString(sum), nil
+	return hex.EncodeToString(h.Sum(nil)), nil
 	// alternatively return in base64
-	//return base64.StdEncoding.EncodeToString(sum), nil
+	//return base64.StdEncoding.EncodeToString(h.Sum(nil)), nil
 }