Use Agent.Subscribe() to register diagnostic subscribers that automatically capture outgoing HTTP calls as spans within your transactions.

Required Imports

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using Atatus;
using Atatus.DiagnosticSource;

HttpDiagnosticsSubscriber

Use HttpDiagnosticsSubscriber to automatically capture all outgoing HTTP requests made via HttpClient as spans. Each HTTP call will appear as a span under the active transaction.

Syntax

Agent.Subscribe(new HttpDiagnosticsSubscriber());

Example

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using Atatus;
using Atatus.Api;
using Atatus.DiagnosticSource;

// Subscribe to HTTP diagnostic events at application startup
Agent.Subscribe(new HttpDiagnosticsSubscriber());

var httpClient = new HttpClient
{
    BaseAddress = new Uri("http://localhost:8080/")
};

var transaction = Atatus.Agent.Tracer.StartTransaction("GET /api/users", ApiConstants.TypeRequest);

try
{
    // This HTTP call is automatically captured as a span
    var response = await httpClient.GetAsync("/api/users");
    var content = await response.Content.ReadAsStringAsync();
}
catch (Exception ex)
{
    transaction.CaptureException(ex);
}
finally
{
    transaction.End();
}

See also