How to get error body returned by server when using Retrofit + Coroutine

Question

When using Coroutine with Retrofit in order to call network apis, in case the server returns an error (response code != 200) we will get an Exception. My question is how to find/read the error body (in Json) sent by the server through the Exception?

try{
     apiService.login()
}catch(exception:Exception){
     //How to read error body from exception
     //Error body example: {"ok":false,"error":"Incorrect username or password."}
}

Answer 1

You will just need to do this:

(exception as? HttpException)?.response()?.errorBody()?.string()

This will return the error body in Json format.