Stackify not using proxy in ASP.NET Core

Question

In a ASP.Net Core website I am using NLog with a StackifyTarget to log to Stackify Retrace. Our code is running behind a corporate HTTP proxy.

I have some custom code that returns a WebProxy. The WebProxy is then set on StackifyLib.Utils.HttpClient.CustomWebProxy, in the Configure method of the StartUp.cs.

When a log is written, it is written successfully to file, but not to the StackifyTarget.

When I investigate the network traffic using Fiddler, I can see that there are 407/Proxy AuthenticationRequired errors for outbound traffic to the Stackify servers.

Using the same StackifyTarget in a WinForms application, .Net Framework 4.7.2, it just works fine:

<system.net>
    <defaultProxy useDefaultCredentials="true" />
</system.net>

When I set a breakpoint on the Log.Info, I can see that the proxy information is still set on the StackifyLib. How can have StackifyLib work correctly with the proxy, in ASP.Net Core?

Think you have to contact `support@stackify.com` and have them fix the existing issue: https://github.com/stackify/stackify-api-dotnet/issues/81 by using HttpClientHandler as recommended by Microsoft: https://github.com/dotnet/corefx/issues/28780#issuecomment-378322214 — Rolf Kristensen, Feb 06 '19 at 19:38
The custom code that assigns proxy to `CustomWebProxy` could also try and assign this first `System.Net.WebRequest.DefaultWebProxy = webProxy;` (As the very first thing in the application, before Stackify-HttpClient is created). — Rolf Kristensen, Feb 06 '19 at 19:46
@RolfKristensen: it worked! It seems that when the proxy is set after StackifyLib is initialized, it isn't picking up the settings anymore. If you add it as an answer, I'll vote for it! — Michel van Engelen, Feb 11 '19 at 14:19

score 1 · Accepted Answer · answered Feb 17 '19 at 17:58

1

The custom code that assigns proxy to CustomWebProxy could also try and assign this first:

System.Net.WebRequest.DefaultWebProxy = webProxy;

As the very first thing in the application, before Stackify-HttpClient is created.

answered Feb 17 '19 at 17:58

Rolf Kristensen

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score 0 · Answer 2 · answered Feb 06 '19 at 14:59

Stackify has 2 docs that may help with this: https://docs.stackify.com/docs/troubleshoot-errors-and-logs-net-configurations https://docs.stackify.com/docs/http-proxies-configure

If either of these do not work you can submit a ticket to them to support@stackify.com

Stackify not using proxy in ASP.NET Core

2 Answers2