Loggen des User Agent mit Azure Application Insights

Standardmäßig wird der User-Agent des HTTP-Requests nicht von der Application Insights Middleware des ASP.NET SDKs gespeichert; vermutlich aufgrund der sehr strengen Implementierungsart der DSGVO-Vorgaben von Microsoft.

Dennoch ist es möglich entsprechend den User Agent mit einem eigenen ITelemetryInitializer zu loggen.

 1    public class HttpUserAgentTelemetryInitializer : ITelemetryInitializer
 2    {
 3        private readonly IHttpContextAccessor _httpContextAccessor;
 4
 5        public HttpUserAgentTelemetryInitializer(IHttpContextAccessor httpContextAccessor)
 6        {
 7            _httpContextAccessor = httpContextAccessor;
 8        }
 9
10        public void Initialize(ITelemetry telemetry)
11        {
12            if (telemetry is RequestTelemetry requestTelemetry)
13            {
14                requestTelemetry.Context.GlobalProperties.Add("User-Agent",
15                    _httpContextAccessor.HttpContext.Request.Headers["User-Agent"]);
16            }
17        }
18    }

Dieser muss anschließend noch registriert werden

1services.AddSingleton<ITelemetryInitializer, HttpUserAgentTelemetryInitializer>();

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