Reimplementd IX with OpenSSL

ixwebsocket/include/IXProgressCallback.h

@@ -0,0 +1,16 @@
+/*
+ *  IXProgressCallback.h
+ *  Author: Benjamin Sergeant
+ *  Copyright (c) 2019 Machine Zone, Inc. All rights reserved.
+ */
+
+#pragma once
+
+#include <functional>
+#include <string>
+
+namespace ix
+{
+    using OnProgressCallback = std::function<bool(int current, int total)>;
+    using OnChunkCallback = std::function<void(const std::string&)>;
+}