support for CREDENTIALPROVIDERS for nuget in LinqPad

rowdy_coder

I am using VSTS package feed for my project and it requires custom credential provider for nuget feed authentication.
I tried putting VSTS Credential Provider at LinqPAd/nuget but it is not working. I doubt if LinqPad has support for it. can some one confirm if it is supported then how to configure it ?

FYI - for general info on credential provider http://docs.nuget.org/ndocs/api/credential-providers#using-a-credential-provider-from-an-environment-variable

JoeAlbahari

LINQPad doesn't support VSTS authentication right now. Have you tried creating a personal access token?

https://www.visualstudio.com/en-us/docs/setup-admin/team-services/use-personal-access-tokens-to-authenticate

rowdy_coder

I tried that but that is not working. Any idea where LinqPad stores PAT after configuring ?

JoeAlbahari

LINQPad feeds your proxy credentials to the NuGet library using the following code:

static void SetupProxy ()
{
	if (_proxySetupDone) return;
	_proxySetupDone = true;

	// Set up proxy handling for v3 sources.
	// We need to sync the v2 proxy cache and v3 proxy cache so that the user will not
	// get prompted twice for the same authenticated proxy.
	var v2ProxyCache = global::NuGet.ProxyCache.Instance as IProxyCache;

	global::NuGet.Protocol.Core.v3.HttpHandlerResourceV3.PromptForProxyCredentials = (uri, proxy, cancellationToken) =>
	{
		var v2Credentials = v2ProxyCache?.GetProxy (uri)?.Credentials;
		if (v2Credentials != null && proxy.Credentials != v2Credentials)
		{
			// if cached v2 credentials have not been used, try using it first.
			return Task.FromResult (v2Credentials);
		}

		return Task.FromResult (GetProxyCredentials());
	};

	global::NuGet.Protocol.Core.v3.HttpHandlerResourceV3.ProxyPassed = proxy =>
	{
		// add the proxy to v2 proxy cache.
		v2ProxyCache?.Add (proxy);
	};
}

In addition, it populates the http_proxy environment variable before calling NuGet.Core library features such as search (crazy, I know, but that's the only way I know to get it to use a web proxy.)

aniruddhadas

Any clue when this issues will be fixed? I trued couldnt get this to work

cilerler

Joe, is there any chance you may give this issue a lift?

I feel like I'm in a constant crazy loop that forces me to download new internal packages from VSTS into a folder in order to be able to use my lovely tool LinqPad.

Is there any chance you can give us a way to make this work?

Thanks in advance

ordinaryorange

Per this SO post, change the end of your feed URL to /v2. Then create a Personal Access Token and put it into both the username and password fields. Works here. HTH

leon99

While using this advice allowed me to see the content of my VSTS feed in LINQPad's package manager, it gave an error when I'm trying to add a package to the query. Also, when I try to access the feed again after re-opening the package manager window, it won't show again with "TF400813: Resource not available for anonymous access. Client authentication required." message.
Looks like LINQPad only uses the provided credentials once and then stops passing them.

ivoloshin

I'm having the same problem. /v3 and /v2 suggestion both work, but ONLY when the VSTS Nuget source is the ONLY one in the list. If there's a second one and I'm switching between them, then I get the TF400813 error.

marklio

+1 This is really frustrating