Microsoft project for cloud-based client-server communication
...HTTP client/server, JSON, URI, asynchronous streams, WebSockets client, oAuth. A powerful model for composing asynchronous operations based on C++ 11 features. Windows desktop, Windows Store (UWP), Linux, OS X, Unix, iOS, and Android. Support for Visual Studio 2015 and 2017 with debugger visualizers.
...Entirely built with an event-driven design using Grand Central Dispatch for best performance and concurrency. No dependencies on third-party source code. Parser for web forms submitted using "application/x-www-form-urlencoded" or "multipart/form-data" encodings (including file uploads). Allow implementation of fully asynchronous handlers of incoming HTTP requests. Minimize memory usage with disk streaming of large HTTP request or response bodies. Automatically handle transitions between foreground, background and suspended modes in iOS apps. ...