Hands-On Spring Security 5 for Reactive Applications

HandlerFunction

HandlerFunction accepts a ServerRequest object and returns Mono<ServerResponse>. Both ServerRequest and ServerResponse objects are immutable and fully reactive, built on top of Reactor.

ServerRequest exposes the body as Mono or Flux. Traditionally, BodyExtractor is used to achieve this. However, it also has utility methods which exposes these objects as shown in the following code. ServerRequest also gives access to all HTTP request elements, such as method, URI, and query string parameters:

Mono<String> helloWorld = request.body(BodyExtractors.toMono(String.class);Mono<String> helloWorldUtil = request.bodyToMono(String.class);Flux<Person> movie = request.body(BodyExtractors.toFlux(Movie.class);Flux<Person> movieUtil = request.bodyToFlux(Movie.class); ...