How to get both HTTP response body and Status when using Reactor Netty HTTP Client

Question

I am using the Reactor Netty HTTP client here as a stand alone dependency, ie not via spring-webflux because I do not want to drag in Spring related dependencies

As can be seen from the documentation it is possible to make a request that returns HttpClientResponse

import reactor.netty.http.client.HttpClient;
import reactor.netty.http.client.HttpClientResponse;

public class Application {

    public static void main(String[] args) {
        HttpClientResponse response =
                HttpClient.create()                   
                          .get()                      
                          .uri("http://example.com/") 
                          .response()                 
                          .block();
    }
}

Thing is HttpClientResponse only contains the headers and the staus. As can be seen from its Java Docs here

Also from the example to consume data one can do

import reactor.netty.http.client.HttpClient;

public class Application {

    public static void main(String[] args) {
        String response =
                HttpClient.create()
                          .get()
                          .uri("http://example.com/")
                          .responseContent() 
                          .aggregate()       
                          .asString()        
                          .block();
    }
}

But this only returns the http entity data as string. No information about the headers nor status code.

The problem I have now is I need to make a request and get a response that gives me both the headers, status etc alongside with the http response body.

I cannot seem to find how. Any ideas?qw

Are you using reactor-netty as a standalone dependency? Or in the context of spring-webflux? If so you may want to use WebClient instead — Denis Zavedeev
As a stand alone dependency. I updated to question to include this — Finlay Weber

Denis Zavedeev Denis Zavedeev · Accepted Answer · 2020-09-06T15:40:48

Take a look at the following methods:

They allow you to access response body, status, and http headers simultaneously.

For example using the responseSingle method you can do the following:

private Mono<Foo> getFoo() {
    return httpClient.get()
            .uri("foos/1")
            .responseSingle(
                    (response, bytes) ->
                            bytes.asString()
                                    .map(it -> new Foo(response.status().code(), it))
            );
}

The code above translates the response into some domain object Foo defined as follows:

public static class Foo {
    int status;
    String response;

    public Foo(int status, String response) {
        this.status = status;
        this.response = response;
    }
}

How to get both HTTP response body and Status when using Reactor Netty HTTP Client

1 Answers