it looks like dart pub is not working behind a corporate proxy with authentication

[insinfo]

it seems that dart pub is not working behind a corporate proxy, I configured a Windows 10 PC with corporate Proxy with authentication and installed Chocolatey using the proxy through an environment variable and Chocolatey worked correctly including installing dart sdk 2.18 correctly but when I went to use dart pub it didn't work

PS C:\tiff_to_pdf-main\tiff_to_pdf-main> dart pub get
Resolving dependencies...
Proxy failed to establish tunnel (407 Proxy Authentication Required)
PS C:\tiff_to_pdf-main\tiff_to_pdf-main> dart --version
Dart SDK version: 2.18.0 (stable) (Fri Aug 26 10:22:54 2022 +0000) on "windows_x64"

[sigurdm]

Maybe you need to lower-case the env-vars: https://dart.dev/tools/pub/troubleshoot#pub-get-fails-from-behind-a-corporate-firewall...

[sigurdm]

(never mind, it seems we are supposed to read both:

sdk/sdk/lib/_http/http_impl.dart

Line 3326 in c954620

if (url.isScheme("http")) {

)