public bool TryExtract <TCarrier, TCarrierGetter>(TCarrier carrier, TCarrierGetter carrierGetter, out SpanContext?spanContext)
where TCarrierGetter : struct, ICarrierGetter <TCarrier>
{
spanContext = null;
var rawTraceId = ParseUtility.ParseString(carrier, carrierGetter, TraceId)?.Trim();
var rawSpanId = ParseUtility.ParseString(carrier, carrierGetter, SpanId)?.Trim();
var samplingPriority = ParseUtility.ParseInt32(carrier, carrierGetter, Sampled);
if (IsValidTraceId(rawTraceId) && IsValidSpanId(rawSpanId))
{
#if NETCOREAPP
var traceId = rawTraceId.Length == 32 ?
ParseUtility.ParseFromHexOrDefault(rawTraceId.AsSpan(16)) :
ParseUtility.ParseFromHexOrDefault(rawTraceId);
#else
var traceId = rawTraceId.Length == 32 ?
ParseUtility.ParseFromHexOrDefault(rawTraceId.Substring(16)) :
ParseUtility.ParseFromHexOrDefault(rawTraceId);
#endif
if (traceId == 0)
{
return(false);
}
var parentId = ParseUtility.ParseFromHexOrDefault(rawSpanId);
spanContext = new SpanContext(traceId, parentId, samplingPriority, serviceName: null, null, rawTraceId, rawSpanId);
return(true);
}
return(false);
}
public bool TryExtract <TCarrier, TCarrierGetter>(TCarrier carrier, TCarrierGetter carrierGetter, out SpanContext?spanContext)
where TCarrierGetter : struct, ICarrierGetter <TCarrier>
{
spanContext = null;
var rawTraceId = ParseUtility.ParseString(carrier, carrierGetter, TraceId)?.Trim();
var rawSpanId = ParseUtility.ParseString(carrier, carrierGetter, SpanId)?.Trim();
var samplingPriority = ParseUtility.ParseInt32(carrier, carrierGetter, Sampled);
if (IsValidTraceId(rawTraceId, out var traceId) && IsValidSpanId(rawSpanId))
{
var parentId = ParseUtility.ParseFromHexOrDefault(rawSpanId);
spanContext = new SpanContext(traceId, parentId, samplingPriority, serviceName: null, null, rawTraceId, rawSpanId);
return(true);
}
return(false);
}
public bool TryExtract <TCarrier, TCarrierGetter>(TCarrier carrier, TCarrierGetter carrierGetter, out SpanContext?spanContext)
where TCarrierGetter : struct, ICarrierGetter <TCarrier>
{
spanContext = null;
var brValue = ParseUtility.ParseString(carrier, carrierGetter, B3)?.Trim();
if (!string.IsNullOrEmpty(brValue))
{
// We found a trace parent (we are reading from the Http Headers)
// 80f198ee56343ba864fe8b2a57d3eff7-e457b5a2e4d86bd1-1-05e3ac9a4f6e3b90
// 80f198ee56343ba864fe8b2a57d3eff7-e457b5a2e4d86bd1-1
// e457b5a2e4d86bd1-e457b5a2e4d86bd1-1-05e3ac9a4f6e3b90
// e457b5a2e4d86bd1-e457b5a2e4d86bd1-1
if (brValue !.Length != 68 && brValue !.Length != 51 &&
brValue !.Length != 52 && brValue !.Length != 35)
{
return(false);
}
#if NETCOREAPP
ReadOnlySpan <char> rawTraceId = null;
ReadOnlySpan <char> rawSpanId = null;
char rawSampled = '0';
if (brValue.Length > 50 && brValue[32] == '-' && brValue[49] == '-')
{
// 128 bits trace id
rawTraceId = brValue.AsSpan(0, 32);
rawSpanId = brValue.AsSpan(33, 16);
rawSampled = brValue[50];
}
else if (brValue.Length > 34 && brValue[16] == '-' && brValue[33] == '-')
{
// 64 bits trace id
rawTraceId = brValue.AsSpan(0, 16);
rawSpanId = brValue.AsSpan(17, 16);
rawSampled = brValue[34];
}
else
{
return(false);
}
var traceId = rawTraceId.Length == 32 ?
ParseUtility.ParseFromHexOrDefault(rawTraceId.Slice(16)) :
ParseUtility.ParseFromHexOrDefault(rawTraceId);
var parentId = ParseUtility.ParseFromHexOrDefault(rawSpanId);
var samplingPriority = rawSampled == '1' ? 1 : 0;
spanContext = new SpanContext(traceId, parentId, samplingPriority, serviceName: null, null, rawTraceId.ToString(), rawSpanId.ToString());
#else
string?rawTraceId = null;
string?rawSpanId = null;
char rawSampled = '0';
if (brValue.Length > 50 && brValue[32] == '-' && brValue[49] == '-')
{
// 128 bits trace id
rawTraceId = brValue.Substring(0, 32);
rawSpanId = brValue.Substring(33, 16);
rawSampled = brValue[50];
}
else if (brValue.Length > 34 && brValue[16] == '-' && brValue[33] == '-')
{
// 64 bits trace id
rawTraceId = brValue.Substring(0, 16);
rawSpanId = brValue.Substring(17, 16);
rawSampled = brValue[34];
}
else
{
return(false);
}
var traceId = rawTraceId.Length == 32 ?
ParseUtility.ParseFromHexOrDefault(rawTraceId.Substring(16)) :
ParseUtility.ParseFromHexOrDefault(rawTraceId);
var parentId = ParseUtility.ParseFromHexOrDefault(rawSpanId);
var samplingPriority = rawSampled == '1' ? 1 : 0;
spanContext = new SpanContext(traceId, parentId, samplingPriority, serviceName: null, null, rawTraceId, rawSpanId);
#endif
return(true);
}
return(false);
}
public bool TryExtract <TCarrier, TCarrierGetter>(TCarrier carrier, TCarrierGetter carrierGetter, out SpanContext?spanContext)
where TCarrierGetter : struct, ICarrierGetter <TCarrier>
{
spanContext = null;
var traceParent = ParseUtility.ParseString(carrier, carrierGetter, TraceParent)?.Trim();
if (!string.IsNullOrEmpty(traceParent))
{
// We found a trace parent (we are reading from the Http Headers)
/* (https://www.w3.org/TR/trace-context/)
* Valid traceparent when caller sampled this request:
*
* Value = 00-4bf92f3577b34da6a3ce929d0e0e4736-00f067aa0ba902b7-01
* base16(version) = 00
* base16(trace-id) = 4bf92f3577b34da6a3ce929d0e0e4736
* base16(parent-id) = 00f067aa0ba902b7
* base16(trace-flags) = 01 // sampled
* Valid traceparent when caller didn’t sample this request:
*
* Value = 00-4bf92f3577b34da6a3ce929d0e0e4736-00f067aa0ba902b7-00
* base16(version) = 00
* base16(trace-id) = 4bf92f3577b34da6a3ce929d0e0e4736
* base16(parent-id) = 00f067aa0ba902b7
* base16(trace-flags) = 00 // not sampled
*/
if (traceParent !.Length != 55 || traceParent[2] != '-' || traceParent[35] != '-' || traceParent[52] != '-')
{
return(false);
}
char w3cSampled = traceParent[54];
if (traceParent[53] != '0' || (w3cSampled != '0' && w3cSampled != '1'))
{
return(false);
}
var samplingPriority = w3cSampled == '0' ? 0 : 1;
#if NETCOREAPP
var w3cTraceId = traceParent.AsSpan(3, 32);
var w3cSpanId = traceParent.AsSpan(36, 16);
var traceId = ParseUtility.ParseFromHexOrDefault(w3cTraceId.Slice(16));
if (traceId == 0)
{
return(false);
}
var parentId = ParseUtility.ParseFromHexOrDefault(w3cSpanId);
spanContext = new SpanContext(traceId, parentId, samplingPriority, serviceName: null, null, w3cTraceId.ToString(), w3cSpanId.ToString());
#else
var w3cTraceId = traceParent.Substring(3, 32);
var w3cSpanId = traceParent.Substring(36, 16);
var traceId = ParseUtility.ParseFromHexOrDefault(w3cTraceId.Substring(16));
if (traceId == 0)
{
return(false);
}
var parentId = ParseUtility.ParseFromHexOrDefault(w3cSpanId);
spanContext = new SpanContext(traceId, parentId, samplingPriority, serviceName: null, null, w3cTraceId, w3cSpanId);
#endif
return(true);
}
return(false);
}