wba/frontend/src/js/misc/make-arvados-request.js

function makeArvadosRequest(arvHost, arvToken, endpoint, method='GET', data=null,
  contentType='application/json;charset=utf-8', responseType='json') {

  if (!arvHost || !arvToken)
    return new Promise((accept, reject) => reject());

  let xhr = new XMLHttpRequest();
  xhr.open(method, 'https://' + arvHost + endpoint);
  xhr.setRequestHeader('Authorization', 'OAuth2 ' + arvToken);
  if (data !== null)
    xhr.setRequestHeader('Content-Type', contentType);
  xhr.responseType = responseType;

  let res = new Promise((accept, reject) => {
    xhr.onreadystatechange = () => {
      if (xhr.readyState !== 4)
        return;
      if (xhr.status !== 200)
        reject(xhr);
      else
        accept(xhr);
    };
    xhr.send(data);
  });

  return res;
}

export default makeArvadosRequest;