Mastering API Requests in Flutter with Dio

Blend Visions
8 min readNov 23, 2024

Flutter developers always try to find ways to manage and perform network requests faster in their applications. Enter Dio: an urge and versatile HTTP client for Dart and Flutter to handle APIs. It has a rich set of features needed for powering modern apps. In this complete tutorial, you will learn how to utilize Dio to process different types of HTTP requests, responses, and other features such as file uploading and progress bar.

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Getting Started with Dio

Let me tell you how to get started with Dio properly, what it is and what it is not, and some basic examples. Dio is by far one of the easiest packages to integrate into your Flutter application with a sleek, easy to learn API to make your HTTP requests feel more natural. However, unlike other HTTP clients for Dartlang, Dio was designed with Flutter in mind and is bundled with the ability to work with Flutter’s futures and dispose of forestry.

Interceptor system, for instance, on Dio is incredible since you can inspect and modify HTTP requests and responses across the system. This is especially convenient when extending an SQS API to add attributes like authentication tokens, record network activities, or add retry functionality among others. The interceptor system organized itself in a middleware way so that it…

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