public ISpanContext Extract(ITextMap carrier)
{
SpanContext spanContext = null;
Dictionary <string, string> baggage = new Dictionary <string, string>();
foreach (var item in carrier)
{
if (item.Key.ToLower() == _spanContextKey.ToLower())
{
spanContext = SpanContext.FromString(item.Value);
}
baggage.Add(item.Key, item.Value);
}
if (spanContext is null)
{
return(null);
}
if (baggage.Any())
{
spanContext = spanContext.WithBaggage(baggage);
}
return(spanContext);
}
protected override SpanContext Extract(ITextMap carrier)
{
SpanContext context = null;
Dictionary <string, string> baggage = null;
string debugId = null;
foreach (var entry in carrier)
{
// TODO there should be no lower-case here
string key = entry.Key.ToLowerInvariant();
if (string.Equals(key, _contextKey, StringComparison.Ordinal))
{
context = SpanContext.ContextFromString(DecodedValue(entry.Value));
}
else if (string.Equals(key, Constants.DebugIdHeaderKey, StringComparison.Ordinal))
{
debugId = DecodedValue(entry.Value);
}
else if (key.StartsWith(_baggagePrefix, StringComparison.Ordinal))
{
if (baggage == null)
{
baggage = new Dictionary <string, string>();
}
baggage[Keys.UnprefixedKey(key, _baggagePrefix)] = DecodedValue(entry.Value);
}
}
if (context == null)
{
if (debugId != null)
{
return(SpanContext.WithDebugId(debugId));
}
return(null);
}
if (baggage == null)
{
return(context);
}
return(context.WithBaggage(baggage));
}