Retrofit - Is it possible to avoid calling actual api from application interceptor and return hard-coded response?

user_2484327 0
Viewed 758

source - https://square.github.io/okhttp/interceptors/

I understand that this is how the interceptor works and a request from the application passes through the OkHttp core, via retrofit wrapper and OkHttpp core call to make an actual network request and the network response to the application interceptor response via the retrofit wrapper.

Is there a way to avoid calling the actual request from the application interceptor, as in, in some scenario in application interceptor check if the request URL is some string, then, in that case, do-not-call the actual network request and directly return the hard-coded response from the application interceptor?

retrofit okhttp interceptor android
2 Answers

You can return a new Response instead of calling chain.proceed() and it would stop the chain from moving forward. You can do it like this.

if(something)
    return Response.Builder()
           .code(200) //Or whatever you might later check from
           .protocol(Protocol.HTTP_2) //or 1
           .message("SUCCESS")
           .body(ResponseBody.create(MediaType.get("application/json"), "{\"x\": 1}")) // your response
           .request(chain.request())
           .build()

I also recommend to define an annotation, and get it in your interceptor instead of checking for the URL.

 request.tag(Invocation::class.java)?.method()?.getAnnotation(YourAnnotation::class.java)
user_19059650

Retrofit has so called "retrofit-mock", which is designed specifically for your task - mocking: https://github.com/square/retrofit/tree/master/retrofit-mock

You can try it, maybe you will find it useful.

Example of usage: https://github.com/square/retrofit/blob/master/samples/src/main/java/com/example/retrofit/SimpleMockService.java

You can create 2 implementations of your retrofit service - real and mocked. And provide one of them via DI depending on build flavor or application mode (demo mode or real http session).

user_8947010
Related