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Drogon is a C++17/20-based HTTP application framework. Drogon can be used to easily build various types of web application server programs using C++.

Drogon is the name of a dragon in the American TV series "Game of Thrones" that I really like.

Drogon's main application platform is Linux. It also supports Mac OS, FreeBSD and Windows.

Its main features are as follows:

• Use a non-blocking I/O network lib based on epoll (kqueue under macOS/FreeBSD) to provide high-concurrency, high-performance network IO, please visit the TFB Tests Results for more details;
• Provide a completely 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, controllers and views.
• Support cookies and built-in sessions;
• Support back-end rendering, the controller generates the data to the view to generate the Html page. Views are described by CSP template files, C++ codes are embedded into Html pages through CSP tags. And the drogon command-line tool automatically generates the C++ code files for compilation;
• Support view page dynamic loading (dynamic compilation and loading at runtime);
• Provide a convenient and flexible routing solution from the path to the controller handler;
• Support filter chains to facilitate the execution of unified logic (such as login verification, Http Method constraint verification, etc.) before handling HTTP requests;
• Support https (based on OpenSSL);
• Support WebSocket (server side and client side);
• Support JSON format request and response, very friendly to the Restful API application development;
• Support file download and upload;
• Support gzip, brotli compression transmission;
• Support pipelining;
• Provide a lightweight command line tool, drogon_ctl, to simplify the creation of various classes in Drogon and the generation of view code;
• Support non-blocking I/O based asynchronously reading and writing database (PostgreSQL and MySQL(MariaDB) database);
• Support asynchronously reading and writing sqlite3 database based on thread pool;
• Support ARM Architecture;
• Provide a convenient lightweight ORM implementation that supports for regular object-to-database bidirectional mapping;
• Support plugins which can be installed by the configuration file at load time;
• Support AOP with build-in joinpoints.