public async Task InvokeAsync(HttpContext httpContext)
{
var userAgent = "Unknown";
if (httpContext.Request.Headers.TryGetValue("User-Agent", out var userAgentValue))
{
userAgent = userAgentValue.First();
}
var correlationId = "Not Set";
if (httpContext.Request.Headers.TryGetValue("Correlation-Id", out var correlationIdValue))
{
correlationId = correlationIdValue.First();
}
using var loggingScope = _logger.BeginScope(new Dictionary <string, object>
{
["UserAgent"] = userAgent,
["CorrelationId"] = correlationId
});
try
{
await _next(httpContext);
}
catch (Exception e)
{
_logger.LogError(e, "An unhandled exception was thrown by the application for request.");
_metricRecorder.RecordMetric("unhandled-exception", 1, new[]
{
$"correlation_id:{correlationId}",
$"user_agent:{userAgent}"
});
throw; // Let ASP.NET Core handle this
}
_metricRecorder.RecordMetric("sending-response", 1, new[]
{
$"status_code:{httpContext.Response.StatusCode}",
$"user_agent:{userAgent}"
});
}