Flutter doesn't support downloading Dart SDK over proxy on Windows

[mengchengxxx]

when i run flutter doctor:

PS E:\git_project\flutter\bin> flutter doctor
Checking Dart SDK version...
Downloading Dart SDK 1.25.0-dev.11.0...
Start-BitsTransfer : HTTP 状态 407: 需要代理身份验证。
所在位置 E:\git_project\flutter\bin\internal\update_dart_sdk.ps1:55 字符: 19

• Start-BitsTransfer <<<< -Source $dartSdkUrl -Destination $dartSdkZip
  • CategoryInfo : InvalidOperation: (:) [Start-BitsTransfer], Exception
  • FullyQualifiedErrorId : StartBitsTransferCOMException,Microsoft.BackgroundIntelligentTransfer.Management.NewBits
    TransferCommand

Error: Unable to update Dart SDK. Retrying...

How to solve this problem？

[sethladd]

cc @jakobr-google @mit-mit does this look familiar?

Does this mean that a proxy or intermediary is in the way?

[mit-mit]

I think this is the windows proxy issue @goderbauer has mentioned before?

[Hixie]

Dupe of #10903.

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.