Issues with http2_adapter in dio causing HTTP/1.1 requests to fail and incorrect traffic type displayed in Flutter DevTools

[TheWalkingDead1024]

Package

dio

Version

5.7.0

Operating-System

Android

Adapter

Http2Adapter

Output of flutter doctor -v

[✓] Flutter (Channel stable, 3.19.0, on macOS 14.5 23F79 darwin-arm64, locale zh-Hans-CN)
    • Flutter version 3.19.0 on channel stable at /Users/luhaobo/fvm/versions/3.19.0
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision bae5e49bc2 (10 months ago), 2024-02-13 17:46:18 -0800
    • Engine revision 04817c99c9
    • Dart version 3.3.0
    • DevTools version 2.31.1
    • Pub download mirror https://pub.flutter-io.cn
    • Flutter download mirror https://storage.flutter-io.cn

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/luhaobo/Library/Android/sdk/
    • Platform android-34, build-tools 34.0.0
    • ANDROID_HOME = /Users/luhaobo/Library/Android/sdk/
    • Java binary at: /Users/luhaobo/Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.11+0-17.0.11b1207.24-11852314)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 15.4)
    • Xcode at /Applications/Xcode 15.4.app/Contents/Developer
    • Build 15F31d
    • CocoaPods version 1.16.2

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

[✓] Android Studio (version 2024.1)
    • Android Studio at /Users/luhaobo/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 17.0.11+0-17.0.11b1207.24-11852314)

[✓] VS Code (version 1.95.3)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.102.0

[✓] Connected device (2 available)
    • macOS (desktop) • macos  • darwin-arm64   • macOS 14.5 23F79 darwin-arm64
    • Chrome (web)    • chrome • web-javascript • Google Chrome 131.0.6778.109
    ! Error: Browsing on the local area network for iPhone. Ensure the device is unlocked and attached with a cable or associated with the same local area
      network as this Mac.
      The device must be opted into Developer Mode to connect wirelessly. (code -27)
    ! Error: Browsing on the local area network for iPhone. Ensure the device is unlocked and attached with a cable or associated with the same local area
      network as this Mac.
      The device must be opted into Developer Mode to connect wirelessly. (code -27)
    ! Error: Browsing on the local area network for 鲁好波 iPhone 13 Pro (2700). Ensure the device is unlocked and attached with a cable or associated with
      the same local area network as this Mac.
      The device must be opted into Developer Mode to connect wirelessly. (code -27)
    ! Error: Browsing on the local area network for 鸣人的iPhone. Ensure the device is unlocked and attached with a cable or associated with the same local
      area network as this Mac.
      The device must be opted into Developer Mode to connect wirelessly. (code -27)

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

• No issues found!

Dart Version

3.3.0

Steps to Reproduce

1. Set up dio with http2_adapter as follows:

   final dio = Dio();
   dio.httpClientAdapter = Http2Adapter(
     ConnectionManager(
       idleTimeout: 10000,
     ),
   );

2. Perform a HTTP/1.1 request using dio.
3. Perform a HTTP/2 request using dio.
4. Observe the traffic type in Flutter DevTools.

Expected Result

HTTP/1.1 requests should be handled correctly without failing, and the network traffic should be appropriately categorized and displayed in Flutter DevTools.

Actual Result

HTTP/1.1 requests fail when using http2_adapter, and the network traffic is incorrectly displayed as WebSocket traffic in Flutter DevTools.

[AlexV525]

Please provide a minimal reproducible example. We have a test to make sure that the adapter works with non-TLS requests and HTTP/1.x responses.