Calling rest api secured with Bearer token authentication in Apache Camel route

Question

I need to call a Rest API from my Apache Camel route. The Rest API is secured with a token that can be obtained on andother API.

My demo route looks like following:

    from("direct:iot")
        .id("iot")
        .setHeader(Exchange.HTTP_METHOD, constant("POST"))
        .setHeader(Exchange.CONTENT_TYPE, constant("application/x-www-form-urlencoded"))
        .setBody(simple(STR."username=\{USERNAME}&password=\{PASSWORD}&grant_type=password&client_id=iot-api-client&client_secret=\{CLIENT_SECRET}"))
        .to(TOKEN_URL)
        .unmarshal().json(JsonLibrary.Gson)
        .process(e -> {
            Map body = e.getIn().getBody(Map.class);
            e.getIn().setHeader("Authorization",
                STR."Bearer \{body.get("access_token")}");
        })
        .removeHeader("*")
        .setHeader(Exchange.HTTP_METHOD, constant("GET"))
        .to(STR."\{BASE_URL}\{RESOURCE_URI}")
        .log("${body}");

It works but it seems quite complicatied to me (I should also add some error handling, token caching etc.). I wonder if it can be simplified somehow.

In the APACHE CAMEL 4.2 WHAT'S NEW they write:

"The camel-http component now supports OAuth 2.0 client authentication."

Unfortunately I was not able to find any details.

Answer 1

You can see this unit test HttpOAuth2AuthenticationTest and there is also a little bit docs as there are new oauth options on the http component.