Client

import { check } from 'k6';
import pyroscope from 'https://jslib.k6.io/http-instrumentation-pyroscope/1.0.2/index.js';
import http from 'k6/http';

// Explicitly instantiating a Pyroscope client allows to distinguish
// instrumented from non-instrumented HTTP calls, by keeping APIs separate.
const instrumentedHTTP = new pyroscope.Client();

const testData = { name: 'Bert' };

export default () => {
  // Using the pyroscope client instance, HTTP calls will have
  // baggage header added.
  let res = instrumentedHTTP.request('GET', 'http://httpbin.org/get', null, {
    headers: {
      'X-Example-Header': 'instrumented/request',
    },
  });

  // The 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' },
  });
};