How do I enable logging for HttpClient in a .NET Core console app?

问题

.NET Core 2.2

I have a basic CLI created with dotnet new console. It uses HttpClient to make web requests. How can I see trace or logging information about these requests?

Data like this: https://www.stevejgordon.co.uk/httpclientfactory-asp-net-core-logging

In the .NET Framework, you could turn on System Tracing: https://docs.microsoft.com/en-us/dotnet/framework/network-programming/how-to-configure-network-tracing

回答1:

In your appsettings.json file there will be an object which looks similar to the following:

  "Logging": {
    "LogLevel": {
      "Default": "Warning"
    }
  }

Increase the log level to Information and run your application again. Once you have done that, take a look at this page in the ASP.NET Core documentation for how to enable logging to file or the terminal.

来源：https://stackoverflow.com/questions/56170377/how-do-i-enable-logging-for-httpclient-in-a-net-core-console-app