private static void AddRequestTagsAndInstrumentRequest(HttpWebRequest request, Activity activity)
{
activity.DisplayName = HttpTagHelper.GetOperationNameForHttpMethod(request.Method);
InstrumentRequest(request, activity);
if (activity.IsAllDataRequested)
{
try
{
Options.Enrich?.Invoke(activity, "OnStartActivity", request);
}
catch (Exception ex)
{
HttpInstrumentationEventSource.Log.EnrichmentException(ex);
}
activity.SetTag(SemanticConventions.AttributeHttpMethod, request.Method);
activity.SetTag(SemanticConventions.AttributeHttpHost, HttpTagHelper.GetHostTagValueFromRequestUri(request.RequestUri));
activity.SetTag(SemanticConventions.AttributeHttpUrl, request.RequestUri.OriginalString);
if (Options.SetHttpFlavor)
{
activity.SetTag(SemanticConventions.AttributeHttpFlavor, HttpTagHelper.GetFlavorTagValueFromProtocolVersion(request.ProtocolVersion));
}
}
}
private static void AddResponseTags(HttpWebResponse response, Activity activity)
{
activity.SetCustomProperty("HttpWebRequest.Response", response);
if (activity.IsAllDataRequested)
{
activity.AddTag(SemanticConventions.AttributeHttpStatusCode, HttpTagHelper.GetStatusCodeTagValueFromHttpStatusCode(response.StatusCode));
activity.SetStatus(
SpanHelper
.ResolveSpanStatusForHttpStatusCode((int)response.StatusCode)
.WithDescription(response.StatusDescription));
}
}
private static void AddRequestTagsAndInstrumentRequest(HttpWebRequest request, Activity activity)
{
activity.DisplayName = HttpTagHelper.GetOperationNameForHttpMethod(request.Method);
InstrumentRequest(request, activity);
if (activity.IsAllDataRequested)
{
activity.SetCustomProperty(RequestCustomPropertyName, request);
activity.SetTag(SemanticConventions.AttributeHttpMethod, request.Method);
activity.SetTag(SemanticConventions.AttributeHttpHost, HttpTagHelper.GetHostTagValueFromRequestUri(request.RequestUri));
activity.SetTag(SemanticConventions.AttributeHttpUrl, request.RequestUri.OriginalString);
if (Options.SetHttpFlavor)
{
activity.SetTag(SemanticConventions.AttributeHttpFlavor, HttpTagHelper.GetFlavorTagValueFromProtocolVersion(request.ProtocolVersion));
}
}
}
public override void OnStartActivity(Activity activity, object payload)
{
if (!(this.startRequestFetcher.Fetch(payload) is HttpRequestMessage request))
{
HttpInstrumentationEventSource.Log.NullPayload(nameof(HttpHandlerDiagnosticListener), nameof(this.OnStartActivity));
return;
}
if (this.options.TextFormat.IsInjected(request, HttpRequestMessageHeaderValuesGetter))
{
// this request is already instrumented, we should back off
activity.IsAllDataRequested = false;
return;
}
activity.SetKind(ActivityKind.Client);
activity.DisplayName = HttpTagHelper.GetOperationNameForHttpMethod(request.Method);
this.activitySource.Start(activity);
if (activity.IsAllDataRequested)
{
activity.AddTag(SemanticConventions.AttributeHttpMethod, HttpTagHelper.GetNameForHttpMethod(request.Method));
activity.AddTag(SemanticConventions.AttributeHttpHost, HttpTagHelper.GetHostTagValueFromRequestUri(request.RequestUri));
activity.AddTag(SemanticConventions.AttributeHttpUrl, request.RequestUri.OriginalString);
if (this.options.SetHttpFlavor)
{
activity.AddTag(SemanticConventions.AttributeHttpFlavor, HttpTagHelper.GetFlavorTagValueFromProtocolVersion(request.Version));
}
}
if (!(this.httpClientSupportsW3C && this.options.TextFormat is TraceContextFormat))
{
this.options.TextFormat.Inject(activity.Context, request, HttpRequestMessageHeaderValueSetter);
}
}
public override void OnStopActivity(Activity activity, object payload)
{
if (activity.IsAllDataRequested)
{
var requestTaskStatus = this.stopRequestStatusFetcher.Fetch(payload) as TaskStatus?;
if (requestTaskStatus.HasValue)
{
if (requestTaskStatus != TaskStatus.RanToCompletion)
{
if (requestTaskStatus == TaskStatus.Canceled)
{
activity.SetStatus(Status.Cancelled);
}
else if (requestTaskStatus != TaskStatus.Faulted)
{
// Faults are handled in OnException and should already have a span.Status of Unknown w/ Description.
activity.SetStatus(Status.Unknown);
}
}
}
if (this.stopResponseFetcher.Fetch(payload) is HttpResponseMessage response)
{
// response could be null for DNS issues, timeouts, etc...
activity.SetTag(SemanticConventions.AttributeHttpStatusCode, HttpTagHelper.GetStatusCodeTagValueFromHttpStatusCode(response.StatusCode));
activity.SetStatus(
SpanHelper
.ResolveSpanStatusForHttpStatusCode((int)response.StatusCode)
.WithDescription(response.ReasonPhrase));
}
}
this.activitySource.Stop(activity);
}
private static void AddExceptionTags(Exception exception, Activity activity)
{
activity.SetCustomProperty("HttpWebRequest.Exception", exception);
if (!activity.IsAllDataRequested)
{
return;
}
Status status;
if (exception is WebException wexc)
{
if (wexc.Response is HttpWebResponse response)
{
activity.AddTag(SemanticConventions.AttributeHttpStatusCode, HttpTagHelper.GetStatusCodeTagValueFromHttpStatusCode(response.StatusCode));
status = SpanHelper.ResolveSpanStatusForHttpStatusCode((int)response.StatusCode).WithDescription(response.StatusDescription);
}
else
{
switch (wexc.Status)
{
case WebExceptionStatus.Timeout:
status = Status.DeadlineExceeded;
break;
case WebExceptionStatus.NameResolutionFailure:
status = Status.InvalidArgument.WithDescription(exception.Message);
break;
case WebExceptionStatus.SendFailure:
case WebExceptionStatus.ConnectFailure:
case WebExceptionStatus.SecureChannelFailure:
case WebExceptionStatus.TrustFailure:
status = Status.FailedPrecondition.WithDescription(exception.Message);
break;
case WebExceptionStatus.ServerProtocolViolation:
status = Status.Unimplemented.WithDescription(exception.Message);
break;
case WebExceptionStatus.RequestCanceled:
status = Status.Cancelled;
break;
case WebExceptionStatus.MessageLengthLimitExceeded:
status = Status.ResourceExhausted.WithDescription(exception.Message);
break;
default:
status = Status.Unknown.WithDescription(exception.Message);
break;
}
}
}
else
{
status = Status.Unknown.WithDescription(exception.Message);
}
activity.SetStatus(status);
}
public override void OnStopActivity(Activity activity, object payload)
{
if (Sdk.SuppressInstrumentation)
{
return;
}
if (this.stopResponseFetcher.TryFetch(payload, out HttpResponseMessage response) && response != null)
{
var request = response.RequestMessage;
// TODO: This is just a minimal set of attributes. See the spec for additional attributes:
// https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/semantic_conventions/http-metrics.md#http-client
var tags = new KeyValuePair <string, object>[]
{
new KeyValuePair <string, object>(SemanticConventions.AttributeHttpMethod, HttpTagHelper.GetNameForHttpMethod(request.Method)),
new KeyValuePair <string, object>(SemanticConventions.AttributeHttpScheme, request.RequestUri.Scheme),
new KeyValuePair <string, object>(SemanticConventions.AttributeHttpStatusCode, (int)response.StatusCode),
new KeyValuePair <string, object>(SemanticConventions.AttributeHttpFlavor, HttpTagHelper.GetFlavorTagValueFromProtocolVersion(request.Version)),
};
this.httpClientDuration.Record(activity.Duration.TotalMilliseconds, tags);
}
}
