Dio's Interceptor implementation that sends http request metric data to Firebase

Description

Dio’s Interceptor implementation that sends http request metric data to Firebase.

STATUS: works for us in production.

Usage

final dio = Dio();
final performanceInterceptor = DioFirebasePerformanceInterceptor();
dio.interceptors.add(performanceInterceptor);

SUGGESTION: If you use dio client as a singleton you can use this interceptor as singleton as well.