Initial QSfera import

Server/vendor/github.com/libregraph/lico/utils/errorpage.go

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2017-2019 Kopano and its licensors
+ *
+ * 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 utils
+
+import (
+	"fmt"
+	"net/http"
+)
+
+// WriteErrorPage create a formatted error page response containing the provided
+// information and writes it to the provided http.ResponseWriter.
+func WriteErrorPage(rw http.ResponseWriter, code int, title string, message string) {
+	if title == "" {
+		title = http.StatusText(code)
+	}
+
+	text := fmt.Sprintf("%d %s", code, title)
+	if message != "" {
+		text = text + " - " + message
+	}
+
+	http.Error(rw, text, code)
+}