feat: add jaeger http trace format (#696)

packages/opentelemetry-core/src/context/propagation/JaegerHttpTraceFormat.ts

@@ -38,11 +38,11 @@ export class JaegerHttpTraceFormat implements HttpTextFormat {
     format: string,
     carrier: { [key: string]: unknown }
   ) {
-    const hexTraceId = removeLeadingZeros(spanContext.traceId);
-    const hexSpanId = removeLeadingZeros(spanContext.spanId);
     const flags = TraceFlags.SAMPLED;
 
-    carrier[UBER_TRACE_ID_HEADER] = `${hexTraceId}:${hexSpanId}:0:${flags}`;
+    carrier[
+      UBER_TRACE_ID_HEADER
+    ] = `${spanContext.traceId}:${spanContext.spanId}:0:${flags}`;
   }
 
   extract(
@@ -59,14 +59,6 @@ export class JaegerHttpTraceFormat implements HttpTextFormat {
   }
 }
 
-/**
- * @param {string} input - the input for which leading zeros should be removed.
- * @return {string} - returns the input string without leading zeros.
- **/
-function removeLeadingZeros(input: string): string {
-  return input.replace(/^0+/, '');
-}
-
 /**
  * @param {string} serializedString - a serialized span context.
  * @return {SpanContext} - returns a span context represented by the serializedString.

packages/opentelemetry-core/src/index.ts

@@ -22,6 +22,7 @@ export * from './version';
 export * from './context/propagation/B3Format';
 export * from './context/propagation/BinaryTraceContext';
 export * from './context/propagation/HttpTraceContext';
+export * from './context/propagation/JaegerHttpTraceFormat';
 export * from './platform';
 export * from './trace/globaltracer-utils';
 export * from './trace/instrumentation/BasePlugin';