# HTTP Request Function
This module provides an HTTP request function that can be reused and composed in other applications.
The `Function` uses the reactive `WebClient` from `Spring WebFlux` and is implemented as a `java.util.function.Function`.
This function gives you a reactive stream of `ResponseEntity` given a stream of request messages as the function a signature of `Function<Message<?>,ResponseEntity>`.
Users have to subscribe to the returned `Flux` to receive the data.
## Beans for injection
You can import the `HttpRequestFunction` configuration in a Spring Boot application and then inject the following bean.
`httpRequestFunction`
You may inject this as `HttpRequestFunction`.
You can use `httpRequestFunction` as a qualifier when injecting.
Once injected, you can use the `apply` method of the `Function` to invoke it and then subscribe to the returned `Flux`.
## Configuration Options
All configuration properties are prefixed with `http.request`.
For more information on the various options available, please see link:src/main/java/org/springframework/cloud/fn/http/request/HttpRequestFunctionProperties.java[HttpRequestFunctionProperties.java]
## Examples
See this link:src/test/java/org/springframework/cloud/fn/http/request/HttpRequestFunctionApplicationTests.java[test suite] for examples of how this function is used.
## Other usage
See this link:../../../applications/processor/http-request-processor/README.adoc[README] where this function is used to create a Spring Cloud Stream application to process HTTP requests.
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