From df68a84f4257d771f8c165765710768c2701b4db Mon Sep 17 00:00:00 2001
From: Jumper Chen <jumperchen@gmail.com>
Date: Fri, 2 Feb 2018 16:26:13 +0800
Subject: [PATCH] fix rikulo/socket.io-client-dart#2

---
 lib/src/engine/parser/parser.dart | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/src/engine/parser/parser.dart b/lib/src/engine/parser/parser.dart
index f31d9d3..78badd1 100644
--- a/lib/src/engine/parser/parser.dart
+++ b/lib/src/engine/parser/parser.dart
@@ -170,9 +170,15 @@ class PacketParser {
     return { 'type': type, 'data': data};
   }
 
+  static hasBinary(List packets) {
+    return packets.any((map) {
+      final data = map['data'];
+      return data is ByteBuffer;
+    });
+  }
   static encodePayload(List packets,
                        {bool supportsBinary = false, callback(_)}) {
-    if (supportsBinary) {
+    if (supportsBinary && hasBinary(packets)) {
       return encodePayloadAsBinary(packets, callback);
     }