public ApiFunctionTelemetryInitializer(IMetadataResolver metadataResolver)
{
if (metadataResolver is null)
{
throw new System.ArgumentNullException(nameof(metadataResolver));
}
_metadata = metadataResolver.GetMetadata();
}
#pragma warning disable CS0618 // Type or member is obsolete: in preview
public Task OnExecutingAsync(FunctionExecutingContext executingContext, CancellationToken cancellationToken)
#pragma warning restore CS0618 // Type or member is obsolete
{
var httpContext = _httpContextAccessor.HttpContext;
if (httpContext != null)
{
var metadata = _metadataResolver.GetMetadata();
httpContext.Response.Headers.Add(ApiVersionResponseHeader, metadata.Version);
httpContext.Response.Headers.Add(ApiNameResponseHeader, metadata.Component);
var correlationId = Activity.Current?.RootId;
if (!string.IsNullOrEmpty(correlationId))
{
httpContext.Response.Headers.Add(ApiCorrelationIdResponseReader, correlationId);
}
}
return(Task.CompletedTask);
}
