1 files changed, 68 insertions, 0 deletions
diff --git a/http/client/response.go b/http/client/response.go
new file mode 100644
index 0000000..f033d61
--- /dev/null
+++ b/http/client/response.go
@@ -0,0 +1,68 @@
+// 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 client
+
+import (
+	"io"
+	"mime"
+	"strings"
+
+	"github.com/miniflux/miniflux/logger"
+	"golang.org/x/net/html/charset"
+)
+
+// Response wraps a server response.
+type Response struct {
+	Body          io.Reader
+	StatusCode    int
+	EffectiveURL  string
+	LastModified  string
+	ETag          string
+	ContentType   string
+	ContentLength int64
+}
+
+// HasServerFailure returns true if the status code represents a failure.
+func (r *Response) HasServerFailure() bool {
+	return r.StatusCode >= 400
+}
+
+// IsModified returns true if the resource has been modified.
+func (r *Response) IsModified(etag, lastModified string) bool {
+	if r.StatusCode == 304 {
+		return false
+	}
+
+	if r.ETag != "" && r.ETag == etag {
+		return false
+	}
+
+	if r.LastModified != "" && r.LastModified == lastModified {
+		return false
+	}
+
+	return true
+}
+
+// NormalizeBodyEncoding make sure the body is encoded in UTF-8.
+//
+// If a charset other than UTF-8 is detected, we convert the document to UTF-8.
+// This is used by the scraper and feed readers.
+//
+// Do not forget edge cases:
+// - Some non-utf8 feeds specify encoding only in Content-Type, not in XML document.
+func (r *Response) NormalizeBodyEncoding() (io.Reader, error) {
+	_, params, err := mime.ParseMediaType(r.ContentType)
+	if err == nil {
+		if enc, found := params["charset"]; found {
+			enc = strings.ToLower(enc)
+			if enc != "utf-8" && enc != "utf8" && enc != "" {
+				logger.Debug("[NormalizeBodyEncoding] Convert body to UTF-8 from %s", enc)
+				return charset.NewReader(r.Body, r.ContentType)
+			}
+		}
+	}
+	return r.Body, nil
+}