feat: add RequestParamValue.Bytes

request.go

@@ -755,6 +755,16 @@ func (rpv *RequestParamValue) String() string {
 	return *rpv.s
 }
 
+// Bytes returns a `[]byte` from the underlying value of the rpv. It returns nil
+// if the rpv is not text-based.
+func (rpv *RequestParamValue) Bytes() []byte {
+	if s := rpv.String(); s != "" {
+		return []byte(s)
+	}
+
+	return nil
+}
+
 // File returns a `multipart.FileHeader` from the underlying value of the rpv.
 func (rpv *RequestParamValue) File() (*multipart.FileHeader, error) {
 	if rpv.f == nil {

request_test.go

@@ -793,6 +793,26 @@ func TestRequestParamValueString(t *testing.T) {
 	assert.NotNil(t, rpv.s)
 }
 
+func TestRequestParamValueBytes(t *testing.T) {
+	rpv := &RequestParamValue{
+		i: "foobar",
+	}
+	assert.Nil(t, rpv.s)
+
+	b := rpv.Bytes()
+	assert.Equal(t, []byte("foobar"), b)
+	assert.NotNil(t, rpv.s)
+
+	rpv = &RequestParamValue{
+		i: errors.New("foobar"),
+	}
+	assert.Nil(t, rpv.s)
+
+	b = rpv.Bytes()
+	assert.Equal(t, []byte("foobar"), b)
+	assert.NotNil(t, rpv.s)
+}
+
 func TestRequestParamValueFile(t *testing.T) {
 	rpv := &RequestParamValue{
 		i: &multipart.FileHeader{},