public void Inject_SpanContext_HeadersWithCorrectInfo()
{
const ulong spanId = 10;
const ulong traceId = 7;
var spanContext = new SpanContext(traceId, spanId);
HeaderCollectionPropagator.Inject(_headers, spanContext);
Assert.Equal(spanId.ToString(), _headers.Get(HttpHeaderParentId));
Assert.Equal(traceId.ToString(), _headers.Get(HttpHeaderTraceId));
}
/// <summary>
/// Extracts a <see cref="SpanContext"/> from the specified headers.
/// </summary>
/// <param name="headers">The headers.</param>
/// <returns>The <see cref="SpanContext"/></returns>
public static SpanContext Extract(this IHeaderCollection headers)
{
var parentIdHeader = headers.Get(HttpHeaderNames.HttpHeaderParentId);
if (parentIdHeader == null)
{
return(null);
}
var traceIdHeader = headers.Get(HttpHeaderNames.HttpHeaderTraceId);
if (traceIdHeader == null)
{
return(null);
}
ulong parentId;
try
{
parentId = Convert.ToUInt64(parentIdHeader);
}
catch (FormatException)
{
return(null);
}
ulong traceId;
try
{
traceId = Convert.ToUInt64(traceIdHeader);
}
catch (FormatException)
{
return(null);
}
return(new SpanContext(traceId, parentId));
}
