1 files changed, 33 insertions, 0 deletions
diff --git a/utils/log.go b/utils/log.go
new file mode 100644
index 000000000..360c785d0
--- /dev/null
+++ b/utils/log.go
@@ -0,0 +1,33 @@
+// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package utils
+
+import (
+	"bytes"
+	"io"
+	"io/ioutil"
+
+	l4g "github.com/alecthomas/log4go"
+)
+
+// DebugReader logs the content of the io.Reader and returns a new io.Reader
+// with the same content as the received io.Reader.
+// If you pass reader by reference, it won't be re-created unless the loglevel
+// includes Debug.
+// If an error is returned, the reader is consumed an cannot be read again.
+func DebugReader(reader io.Reader, message string) (io.Reader, error) {
+	var err error
+	l4g.Debug(func() string {
+		content, err := ioutil.ReadAll(reader)
+		if err != nil {
+			return ""
+		}
+
+		reader = bytes.NewReader(content)
+
+		return message + string(content)
+	})
+
+	return reader, err
+}