First commit

reader/http/response.go

@@ -0,0 +1,32 @@
+// Copyright 2017 Frédéric Guillot. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package http
+
+import "io"
+
+type ServerResponse struct {
+	Body         io.Reader
+	StatusCode   int
+	EffectiveURL string
+	LastModified string
+	ETag         string
+	ContentType  string
+}
+
+func (s *ServerResponse) HasServerFailure() bool {
+	return s.StatusCode >= 400
+}
+
+func (s *ServerResponse) IsModified(etag, lastModified string) bool {
+	if s.StatusCode == 304 {
+		return false
+	}
+
+	if s.ETag != "" && s.LastModified != "" && (s.ETag == etag || s.LastModified == lastModified) {
+		return false
+	}
+
+	return true
+}