Response not produce null response body

[NguyenDinhTruong97]

Package

dio

Version

5.3.0

Output of flutter doctor -v

[✓] Flutter (Channel stable, 3.10.6, on macOS 12.6.3 21G419 darwin-x64, locale en-VN)
    • Flutter version 3.10.6 on channel stable at /Users/admin/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision f468f3366c (12 days ago), 2023-07-12 15:19:05 -0700
    • Engine revision cdbeda788a
    • Dart version 3.0.6
    • DevTools version 2.23.1

[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.2)
    • Android SDK at /Users/admin/Library/Android/sdk
    • Platform android-33, build-tools 33.0.2
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.15+0-b2043.56-8887301)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 14.2)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 14C18
    • CocoaPods version 1.12.1

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2022.1)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 11.0.15+0-b2043.56-8887301)

[✓] Connected device (4 available)
    • Star 5 (mobile)      • BRB00064261                              • android-arm64  • Android 11 (API 30)
    • Gym iPhone (mobile) • 4a00cbe28e36bde37a76a2eadb4afd946148b613 • ios            • iOS 14.7.1 18G82
    • macOS (desktop)      • macos                                    • darwin-x64     • macOS 12.6.3 21G419 darwin-x64
    • Chrome (web)         • chrome                                   • web-javascript • Google Chrome 114.0.5735.198

[✓] Network resources
    • All expected network resources are available.

• No issues found!

Dart Version

3.0.6

Steps to Reproduce

1. Set dio.options.responseType = ResponseType.json;
2. Request to GET data from API

Expected Result

Response produce null result

Actual Result

Response is String with "" value

[AlexV525]

The response data will be null if your content-type is defined as application/json in your response header.

[VasanthakumarTW]

If Response type is application/json - DioError.Response.Data is coming null