Drogon is a C++11-based HTTP application framework. Drogon can be used to easily build various types of web application server programs using C++. Drogon's main application platform is Linux. For debugging purposes, it also supports Mac OS. There is no plan to support Windows. Its main features are as follows:

• The network layer uses a NIO framework based on epoll (poll under MacOS) to provide high-concurrency, high-performance network IO;
• Full asynchronous programming mode;
• Support Http1.0/1.1 (server side and client side);
• Based on template, a simple reflection mechanism is implemented to completely decouple the main program framework, controller and view.
• Support for cookies and built-in sessions;
• Support back-end rendering, the controller generates the data to the view to generate the Html page, the view is described by a "JSP-like" CSP file, the C++ code is embedded into the Html page by the CSP tag, and the drogon command-line tool automatically generates the C++ code file for compilation;
• Support view page dynamic loading (dynamic compilation and loading at runtime);
• Very convenient and flexible path to controller handler mapping scheme;
• Support filter chain to facilitate the execution of unified logic (such as login verification, Http Method constraint verification, etc.) before the controller;
• Support https (based on OpenSSL implementation);
• Support websocket (server side);
• Support Json format request and response;
• Support file download and upload;
• Support gzip compression transmission;
• Provides a lightweight command line tool, drogon_ctl, to simplify the creation of various classes in Drogon and the generation of view code;

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