Merge pull request #2359 from kbynd/patch-1

content-length not set in case EnableGZIP=true

context/output.go

@@ -67,6 +67,7 @@ func (output *BeegoOutput) Body(content []byte) error {
 	}
 	if b, n, _ := WriteBody(encoding, buf, content); b {
 		output.Header("Content-Encoding", n)
+		output.Header("Content-Length", strconv.Itoa(buf.Len()))
 	} else {
 		output.Header("Content-Length", strconv.Itoa(len(content)))
 	}