Client

import { check } from "k6";
import tracing from "k6/experimental/tracing";
import http from "k6/http";

// Explicitly instantiating a tracing client allows to distringuish
// instrumented from non-instrumented HTTP calls, by keeping APIs separate.
// It also allows for finer-grained configuration control, by letting
// users changing the tracing configuration on the fly during their
// script's execution.
const instrumentedHTTP = new tracing.Client({
  propagator: "w3c",
});

const testData = { name: "Bert" };

export default () => {
  // Using the tracing client instance, HTTP calls will have
  // their trace context headers set.
  let res = instrumentedHTTP.request("GET", "http://httpbin.org/get", null, {
    headers: {
      "X-Example-Header": "instrumented/request",
    },
  });

  // The tracing client offers more flexibility over
  // the `instrumentHTTP` function, as it leaves the
  // imported standard http module untouched. Thus,
  // one can still perform non-instrumented HTTP calls
  // using it.
  res = http.post("http://httpbin.org/post", JSON.stringify(testData), {
    headers: { "X-Example-Header": "noninstrumented/post" },
  });

  res = instrumentedHTTP.del("http://httpbin.org/delete", null, {
    headers: { "X-Example-Header": "instrumented/delete" },
  });
};