Remove lua and use fastcgi to render errors

controllers/nginx/pkg/fastcgi/fastcgi_test.go

@@ -0,0 +1,70 @@
+/*
+Copyright 2015 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package fastcgi
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestErrorHandler(t *testing.T) {
+	tt := []struct {
+		name   string
+		code   int
+		format string
+	}{
+		{name: "404 text/html", code: 404, format: "text/html"},
+		{name: "503 text/html", code: 503, format: "text/html"},
+		{name: "404 application/json", code: 404, format: "application/json"},
+	}
+
+	for _, tc := range tt {
+		t.Run(tc.name, func(t *testing.T) {
+			req, err := http.NewRequest("GET", "localhost:8080/", nil)
+			req.Header.Add(CodeHeader, fmt.Sprintf("%v", tc.code))
+			req.Header.Add(FormatHeader, tc.format)
+			if err != nil {
+				t.Fatalf("could not created request: %v", err)
+			}
+			w := httptest.NewRecorder()
+			serveError(w, req)
+
+			res := w.Result()
+			defer res.Body.Close()
+
+			b, err := ioutil.ReadAll(res.Body)
+			if err != nil {
+				t.Fatalf("could not read response: %v", err)
+			}
+
+			if res.StatusCode != tc.code {
+				t.Errorf("expected status %v; got %v", tc.code, res.StatusCode)
+			}
+
+			ct := res.Header.Get(ContentTypeHeader)
+			if ct != tc.format {
+				t.Errorf("expected content type %v; got %v", tc.format, ct)
+			}
+
+			if len(b) == 0 {
+				t.Fatalf("unexpected empty body")
+			}
+		})
+	}
+}