StatusNoContent does not allow body

Fix http: request method or response status code does not allow body

cors.go

@@ -86,7 +86,8 @@ func WithConfig(service *goa.Service, conf *GoaCORSConfig) goa.Middleware {
 			if conf.MaxAge > 0 {
 				rw.Header().Set(HeaderAccessControlMaxAge, maxAge)
 			}
-			return service.Send(c, http.StatusNoContent, http.StatusText(http.StatusNoContent))
+			rw.WriteHeader(http.StatusNoContent)
+			return nil
 		}
 	}
 

cors_test.go

@@ -220,6 +220,14 @@ func TestPreflightRequet(t *testing.T) {
 		t.Error("access control allow headers should be 'X-OriginalRequest' but ", rw.Header().Get(goacors.HeaderAccessControlAllowHeaders))
 		t.Fail()
 	}
+
+	// StatusNoContent does not allow body
+	if rw.Status != http.StatusNoContent {
+		t.Errorf("the status should be %d, got %d", http.StatusNoContent, rw.Status)
+	}
+	if len(rw.Body) != 0 {
+		t.Errorf("the length of the body should be 0, got %d", len(rw.Body))
+	}
 }
 
 func TestNotGivenAllowHeaderOnRequest(t *testing.T) {
@@ -325,4 +333,13 @@ func TestAddedAllowOrigHeader(t *testing.T) {
 		t.Error("allow origin should be empty")
 		t.Fail()
 	}
+
+	// StatusNoContent does not allow body
+	if rw.Status != http.StatusNoContent {
+		t.Errorf("the status should be %d, got %d", http.StatusNoContent, rw.Status)
+	}
+	if len(rw.Body) != 0 {
+		t.Errorf("the length of the body should be 0, got %d", len(rw.Body))
+		t.Log(string(rw.Body))
+	}
 }