ADD: ioutil.CopyFile() & ioutil.CreateFileWithData()

util/ioutil/ioutil.go

@@ -14,3 +14,32 @@ func SeekAndReadAll(fi *os.File) ([]byte, error) {
 	}
 	return io.ReadAll(fi)
 }
+
+// CopyFile reads file content and writes to another file.
+func CopyFile(fromPath, toPath string) (int64, error) {
+	from, err := os.Open(fromPath)
+	if err != nil {
+		return 0, err
+	}
+	defer from.Close()
+
+	to, err := os.Create(toPath)
+	if err != nil {
+		return 0, err
+	}
+	defer to.Close()
+
+	// TODO: speedtest with different buf sizes
+	return io.Copy(to, from)
+}
+
+// CreateFileWithData
+func CreateFileWithData(filePath string, data []byte) (int, error) {
+	fi, err := os.Create(filePath)
+	if err != nil {
+		return 0, err
+	}
+	defer fi.Close()
+
+	return fi.Write(data)
+}