Support passing default credentials to a proxy

[mungojam]

We are behind a corporate proxy and so the tool isn't currently usable for us which is a shame as it's great :)

[tlmii]

Sorry it's taken us a while to get back to you.

Default proxy support should already be in the tool. Under the hood, we're using HttpClient, and that picks up the DefaultProxy automatically. I'll get that added to the documentation, but I'm curious what issues you ran into with your corporate proxy. It should just pick up your system proxy, but you can also configure it directly via environment variables (see the Remarks section of the DefaultProxy docs).

[tlmii]

@mungojam Just following up here. I still need to get this added to the documentation. But do you have any additional details on what issues you ran into?

[mungojam]

Hiya, sorry haven't got around to looking into it again. I think the issue is more if you have a Windows authenticated proxy. .net core requires a one-liner to tell it to use the default credentials for the proxy but I'm not at my computer to point you to it. Will try to later 🙂

[mungojam]

You can see how it was added to sleet (following my request):

emgarten/Sleet#126

[tlmii]

@mungojam Ah, so its the auth side that's the problem, not the use of the proxy itself. That makes sense.

Thanks for the link. We've already got default cred support for the APIs themselves, It should be easy to add the call for the proxy too. Looks like we'll need a new preference (probably httpClient.proxy.useDefaultCredentials or similar) and then adding it when we construct the handler in GetHttpClientWithPreferences.

I'll see if we can sneak that in before 5.0