Clean Flutter Network Architecture Using Dio (2022) | Part 3 — Interceptors
Missed out on previous part? Check out Part 2 — Custom Exception and Response Model
Interceptors
Let’s add a few useful interceptors to handle some important network tasks for us. An interceptor fires automatically for each request, response or error depending on which method it overrides. We will create three interceptors.
Api Interceptor
Create a file called api_interceptor.dart . This is how it should look, the docs in the file are self explanatory:
Logging Interceptor
Create a file called logging_interceptor.dart like this:
Refresh Token Interceptor
Create a file refresh_token_interceptor.dart like this:
You can add these interceptors while initializing DioService.
Summary
We have leveraged the power of Dio Interceptors to automatically log, authorize and validate our network requests and responses. We can now finally move on the towards developing our API interaction by starting of with a helper class for endpoints.
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Read on Part 4: Api Endpoint
