Spark is a lightweight Java web framework and embedded server designed for building web applications with minimal boilerplate. It functions as an HTTP routing engine that maps URL paths and methods to handler functions, providing a specialized domain specific language for web development in Kotlin.
The framework enables the implementation of REST APIs and web services through the definition of HTTP routes. It supports the extraction of dynamic path parameters and the transformation of response data into formats such as JSON.
Additional capabilities include the ability to serve static files and render dynamic HTML via template engine integration. The system also provides request filtering to execute custom logic or security checks before requests reach their final handlers.