remove tracestate

tracer/propagation_ot.go

@@ -30,7 +30,6 @@ const (
 	fieldNameSampled      = prefixTracerState + "sampled"
 
 	traceParentKey = "traceparent"
-	traceStateKey  = "tracestate"
 )
 
 func (p *textMapPropagator) Inject(
@@ -64,16 +63,10 @@ func (p *textMapPropagator) Inject(
 	)
 	carrier.Set(traceParentKey, traceParentValue)
 
-	var traceStatePairs []string
-
 	for k, v := range sc.Baggage {
 		carrier.Set(prefixBaggage+k, v)
-		traceStatePairs = append(traceStatePairs, k+"="+v)
 	}
 
-	traceStateValue := strings.Join(traceStatePairs, ",")
-	carrier.Set(traceStateKey, traceStateValue)
-
 	return nil
 }
 
@@ -113,55 +106,44 @@ func (p *textMapPropagator) Extract(
 			if traceParentArray[3] == "01" {
 				sampled = true
 			}
-			requiredFieldCount = requiredFieldCount + 2
-		case traceStateKey:
-			traceStateArray := strings.Split(v, ",")
-			for _, stItem := range traceStateArray {
-				stItem = strings.TrimSpace(stItem)
-				if strings.IndexRune(stItem, '=') > -1 {
-					stItemArray := strings.Split(stItem, "=")
-					decodedBaggage[stItemArray[0]] = stItemArray[1]
-				}
-			}
+			requiredFieldCount = requiredFieldCount + 3
 		default:
 			// Balance off the requiredFieldCount++ just below...
 			requiredFieldCount--
 		}
 		requiredFieldCount++
 		return nil
 	})
-	if traceID == uuid.Nil && spanID == 0 {
-		err = carrier.ForeachKey(func(k, v string) error {
-			switch strings.ToLower(k) {
-			case fieldNameTraceID:
-				traceID, err = uuid.Parse(v)
-				if err != nil {
-					return opentracing.ErrSpanContextCorrupted
-				}
-			case fieldNameSpanID:
-				spanID, err = strconv.ParseUint(v, 16, 64)
-				if err != nil {
-					return opentracing.ErrSpanContextCorrupted
-				}
-			case fieldNameSampled:
-				sampled, err = strconv.ParseBool(v)
-				if err != nil {
-					return opentracing.ErrSpanContextCorrupted
-				}
-			default:
-				lowercaseK := strings.ToLower(k)
-				if strings.HasPrefix(lowercaseK, prefixBaggage) {
-					decodedBaggage[strings.TrimPrefix(lowercaseK, prefixBaggage)] = v
-				}
-				// Balance off the requiredFieldCount++ just below...
-				requiredFieldCount--
+	err = carrier.ForeachKey(func(k, v string) error {
+		switch strings.ToLower(k) {
+		case fieldNameTraceID:
+			traceID, err = uuid.Parse(v)
+			if err != nil {
+				return opentracing.ErrSpanContextCorrupted
 			}
-			requiredFieldCount++
-			return nil
-		})
-		if err != nil {
-			return nil, err
+		case fieldNameSpanID:
+			spanID, err = strconv.ParseUint(v, 16, 64)
+			if err != nil {
+				return opentracing.ErrSpanContextCorrupted
+			}
+		case fieldNameSampled:
+			sampled, err = strconv.ParseBool(v)
+			if err != nil {
+				return opentracing.ErrSpanContextCorrupted
+			}
+		default:
+			lowercaseK := strings.ToLower(k)
+			if strings.HasPrefix(lowercaseK, prefixBaggage) {
+				decodedBaggage[strings.TrimPrefix(lowercaseK, prefixBaggage)] = v
+			}
+			// Balance off the requiredFieldCount++ just below...
+			requiredFieldCount--
 		}
+		requiredFieldCount++
+		return nil
+	})
+	if err != nil {
+		return nil, err
 	}
 
 	if requiredFieldCount < tracerStateFieldCount {