Update output.go

context/output.go

@@ -67,8 +67,11 @@ 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(len(content)))
+		output.Header("Content-Length", strconv.Itoa(buf.Len()))
+	} else {
+		output.Header("Content-Length", strconv.Itoa(len(content)))
+	}
+
 	
 	// Write status code if it has been set manually
 	// Set it to 0 afterwards to prevent "multiple response.WriteHeader calls"