@opentelemetry/core/dist/baggage/propagation/W3CBaggagePropagator.mjs

OpenTelemetry Core provides constants and utilities shared by all OpenTelemetry SDK packages.

import { isTracingSuppressed } from "../../trace/suppress-tracing.mjs";
import { BAGGAGE_HEADER, BAGGAGE_MAX_PER_NAME_VALUE_PAIRS } from "../constants.mjs";
import { getKeyPairs, parseBaggageHeaderString, serializeKeyPairs } from "../utils.mjs";
import { propagation } from "@opentelemetry/api";
//#region src/baggage/propagation/W3CBaggagePropagator.ts
/**
* Propagates {@link Baggage} through Context format propagation.
*
* Based on the Baggage specification:
* https://w3c.github.io/baggage/
*/
var W3CBaggagePropagator = class {
	inject(context, carrier, setter) {
		const baggage = propagation.getBaggage(context);
		if (!baggage || isTracingSuppressed(context)) return;
		const keyPairs = getKeyPairs(baggage).filter((pair) => {
			return pair.length <= BAGGAGE_MAX_PER_NAME_VALUE_PAIRS;
		}).slice(0, 180);
		const headerValue = serializeKeyPairs(keyPairs);
		if (headerValue.length > 0) setter.set(carrier, BAGGAGE_HEADER, headerValue);
	}
	extract(context, carrier, getter) {
		const headerValue = getter.get(carrier, BAGGAGE_HEADER);
		if (!headerValue) return context;
		const baggage = {};
		let count = 0;
		let totalSize = 0;
		if (Array.isArray(headerValue)) for (let i = 0; i < headerValue.length; i++) [count, totalSize] = parseBaggageHeaderString(headerValue[i], baggage, count, totalSize);
		else [count] = parseBaggageHeaderString(headerValue, baggage, count, totalSize);
		if (count === 0) return context;
		return propagation.setBaggage(context, propagation.createBaggage(baggage));
	}
	fields() {
		return [BAGGAGE_HEADER];
	}
};
//#endregion
export { W3CBaggagePropagator };

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