Proxy support setting removes GET query parameters from URLs on extension's GET requests

[SounD120]

• VSCode Version: 1.30.2 - 1.31-insiders
• OS Version: Windows 10 (1803), macOS 10.14.2 Mojave

Steps to Reproduce:

1. Clone test VS Code extension with git clone https://github.com/SounD120/proxysupporttest.git command
2. cd proxysupporttest
3. npm i
4. code .
5. Open VS Code Preferences->Settings, find and enable Proxy Support setting with on or override option.
6. Open debug tab and run Run extension
7. In Extension Developement Host call command pallete and run Proxy Support Test: Start test HTTP server command
8. Call Proxy Support Test: Send HTTP request to server command from command pallete

You will see the VS Code information message window with URL which hit the server.

In my test repo I used such URL : http://127.0.0.1:8080?platform=android

Without Proxy Support setting HTTP get request returns : /?platform=android
With Proxy Support setting HTTP get request returns: /

Also this setting is enabled in 1.31-insiders by default, so I want to clarify would it be enabled in release 1.31 version?

Observation: this might be connected to this code

Does this issue occur when all extensions are disabled?: Yes

[vscodebot]

(Experimental duplicate detection)
Thanks for submitting this issue. Please also check if it is already covered by an existing one, like:

• Extension proxy support (#12588)

[chrmarti]

@SounD120 Thanks for the detailed bug report!

The setting will be enabled as 'override' in the upcoming release.