1 files changed, 40 insertions, 0 deletions
diff --git a/devtools/client/netmonitor/src/components/messages/parsers/socket-io/is-buffer.js b/devtools/client/netmonitor/src/components/messages/parsers/socket-io/is-buffer.js
new file mode 100644
index 0000000000..cdbad14abc
--- /dev/null
+++ b/devtools/client/netmonitor/src/components/messages/parsers/socket-io/is-buffer.js
@@ -0,0 +1,40 @@
+/*
+ * A socket.io encoder and decoder written in JavaScript complying with version 4
+ * of socket.io-protocol. Used by socket.io and socket.io-client.
+ *
+ * Copyright (c) 2014 Guillermo Rauch <guillermo@learnboost.com>
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of the library source tree.
+ *
+ * https://github.com/socketio/socket.io-parser
+ */
+
+/* eslint-disable no-undef */
+
+"use strict";
+
+var withNativeBuffer =
+  typeof Buffer === "function" && typeof Buffer.isBuffer === "function";
+var withNativeArrayBuffer = typeof ArrayBuffer === "function";
+
+var isView = function (obj) {
+  return typeof ArrayBuffer.isView === "function"
+    ? ArrayBuffer.isView(obj)
+    : obj.buffer instanceof ArrayBuffer;
+};
+
+/**
+ * Returns true if obj is a buffer or an arraybuffer.
+ *
+ * @api private
+ */
+
+function isBuf(obj) {
+  return (
+    (withNativeBuffer && Buffer.isBuffer(obj)) ||
+    (withNativeArrayBuffer && (obj instanceof ArrayBuffer || isView(obj)))
+  );
+}
+
+module.exports = isBuf;