public async Task SendAsync_CurrentActivitySet_RequestHeadersSet(bool useW3CFormat, ActivityContextHeaders activityContextHeaders)
{
const string TraceStateString = "CustomTraceStateString";
string expectedId = null;
var invoker = new HttpMessageInvoker(new ActivityPropagationHandler(activityContextHeaders, new MockHttpHandler(
(HttpRequestMessage request, CancellationToken cancellationToken) =>
{
var headers = request.Headers;
Assert.True(headers.TryGetValues(useW3CFormat ? "traceparent" : "Request-Id", out var values));
Assert.Equal(expectedId, Assert.Single(values));
if (useW3CFormat)
{
Assert.True(headers.TryGetValues("tracestate", out values));
Assert.Equal(TraceStateString, Assert.Single(values));
}
if (activityContextHeaders.HasFlag(ActivityContextHeaders.Baggage))
{
Assert.True(headers.TryGetValues("Baggage", out values));
Assert.Equal("foo=bar", Assert.Single(values));
}
if (activityContextHeaders.HasFlag(ActivityContextHeaders.CorrelationContext))
{
Assert.True(headers.TryGetValues("Correlation-Context", out values));
Assert.Equal("foo=bar", Assert.Single(values));
}
return(Task.FromResult <HttpResponseMessage>(null));
})));
var activity = new Activity("CustomOperation");
if (useW3CFormat)
{
activity.SetIdFormat(ActivityIdFormat.W3C);
activity.TraceStateString = TraceStateString;
activity.SetParentId("00-01234567890123456789012345678901-0123456789012345-01");
}
else
{
activity.SetIdFormat(ActivityIdFormat.Hierarchical);
activity.SetParentId("|root");
}
activity.AddBaggage("foo", "bar");
activity.Start();
expectedId = activity.Id;
await invoker.SendAsync(new HttpRequestMessage(), CancellationToken.None);
activity.Stop();
}
private void InjectHeaders(Activity currentActivity, HttpRequestMessage request)
{
if (currentActivity.IdFormat == ActivityIdFormat.W3C)
{
request.Headers.Remove(TraceParentHeaderName);
request.Headers.Remove(TraceStateHeaderName);
request.Headers.TryAddWithoutValidation(TraceParentHeaderName, currentActivity.Id);
if (currentActivity.TraceStateString != null)
{
request.Headers.TryAddWithoutValidation(TraceStateHeaderName, currentActivity.TraceStateString);
}
}
else
{
request.Headers.Remove(RequestIdHeaderName);
request.Headers.TryAddWithoutValidation(RequestIdHeaderName, currentActivity.Id);
}
// we expect baggage to be empty or contain a few items
using (var e = currentActivity.Baggage.GetEnumerator())
{
if (e.MoveNext())
{
var baggage = new List <string>();
do
{
var item = e.Current;
baggage.Add(new NameValueHeaderValue(Uri.EscapeDataString(item.Key), Uri.EscapeDataString(item.Value ?? string.Empty)).ToString());
}while (e.MoveNext());
if (_activityContextHeaders.HasFlag(ActivityContextHeaders.Baggage))
{
request.Headers.TryAddWithoutValidation(BaggageHeaderName, baggage);
}
if (_activityContextHeaders.HasFlag(ActivityContextHeaders.CorrelationContext))
{
request.Headers.TryAddWithoutValidation(CorrelationContextHeaderName, baggage);
}
}
}
}