Only set mirror source when a target is configured (#5055)

internal/ingress/annotations/mirror/main.go

@@ -82,6 +82,7 @@ func (a mirror) Parse(ing *networking.Ingress) (interface{}, error) {
 	config.Target, err = parser.GetStringAnnotation("mirror-target", ing)
 	if err != nil {
 		config.Target = ""
+		config.Source = ""
 	}
 
 	return config, nil

internal/ingress/annotations/mirror/main_test.go

@@ -47,7 +47,7 @@ func TestParse(t *testing.T) {
 			Target:      "https://test.env.com/$request_uri",
 		}},
 		{map[string]string{requestBody: "off"}, &Config{
-			Source:      ngxURI,
+			Source:      "",
 			RequestBody: "off",
 			Target:      "",
 		}},