flutter web empty response header

[mhalizadeh]

New Issue Checklist

• I have searched for a similar issue in the project and found none

Issue Info

Info	Value
Platform Name	flutter web
Flutter Version	Channel beta, 1.18.0-11.1.pre, on Linux
Dio Version	^3.0.9
Android Studio / Xcode Version	Android Studio (version 4.0)
Repro rate	all the time (100%)
Repro with our demo prj
Demo project link

Issue Description and Steps

hi everyone
I have a problem with response headers in POST request in web version.
response header is empty
but in google chrome network inspect everything is fine

flutter doctor output

`[✓] Flutter (Channel beta, 1.18.0-11.1.pre, on Linux, locale en_US.UTF-8)
• Flutter version 1.18.0-11.1.pre at /home/mhalizadeh/Android/flutter.beta
• Framework revision 2738a1148b (2 weeks ago), 2020-05-13 15:24:36 -0700
• Engine revision ef9215ceb2
• Dart version 2.9.0 (build 2.9.0-8.2.beta)

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
• Android SDK at /home/mhalizadeh/Android/Sdk
• Platform android-29, build-tools 29.0.2
• ANDROID_HOME = /home/mhalizadeh/Android/Sdk
• Java binary at: /opt/android-studio/jre/bin/java
• Java version OpenJDK Runtime Environment (build
1.8.0_242-release-1644-b3-6222593)
• All Android licenses accepted.

[✓] Chrome - develop for the web
• CHROME_EXECUTABLE = google-chrome-stable

[✓] Android Studio (version 4.0)
• Android Studio at /opt/android-studio
• Flutter plugin version 44.0.2
• Dart plugin version 192.7761
• Java version OpenJDK Runtime Environment (build
1.8.0_242-release-1644-b3-6222593)

[✓] Connected device (3 available)
• Android SDK built for x86 • emulator-5554 • android-x86 • Android 9
(API 28) (emulator)
• Web Server • web-server • web-javascript • Flutter Tools
• Chrome • chrome • web-javascript • Google Chrome
• No issues found!
`

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. If this is still an issue, please make sure it is up to date and if so, add a comment that this is still an issue to keep it open. Thank you for your contributions.

[temirfe]

Have the same problem, except in my case there is only 'content-type' in response headers. I need X-Pagination-.. info. Works fine with android device. dio 3.0.9

[janek515]

@temirfe did you manage to find the cause?