contiago-toolbar/app/utils/request.js

One of the options for outputting content from contiago xml-server

import 'whatwg-fetch';
import config from '../../config.json';

/**
 * Parses the JSON returned by a network request
 *
 * @param  {object} response A response from a network request
 *
 * @return {object}          The parsed JSON from the request
 */
function parseJSON(response) {
  if (response.status === 204 || response.status === 205) {
    return null;
  }
  return response.json();
}

/**
 * Checks if a network request came back fine, and throws an error if not
 *
 * @param  {object} response   A response from a network request
 *
 * @return {object|undefined} Returns either the response, or throws an error
 */
function checkStatus(response) {
  if (response.status >= 400) {
    throw response;
  }
  return response;
}

/**
 * Requests a URL, returning a promise
 *
 * @param  {string} url       The URL we want to request
 * @param  {object} [options] The options we want to pass to "fetch"
 *
 * @return {object}           The response data
 */
export default function request(url, options = {}) {
  const resultUrl = options.getParamsObject && !options.method
        ? `${url}?${Object.keys(options.getParamsObject)
            .filter((paramName) => options.getParamsObject[paramName] !== undefined && options.getParamsObject[paramName] != null)
            .map((paramName) => `${paramName}=${options.getParamsObject[paramName]}`).join('&')}`
        : url;
  const host = localStorage.getItem(config['toolbar.sandbox.attribute.name']) ? config.sandboxXmlContentServerHost : config.xmlContentServerHost;
  const customOptions = {
    ...options,
    headers: {
      'Content-Type': 'application/json',
      [`${config['toolbar.access.token.header.name']}`]: localStorage.getItem(`${config['toolbar.access.token.header.name']}`),
      Accept: '*/*',
      ...(options.headers || {}),
    },
  };

  return fetch(`${host}${resultUrl}`, customOptions)
        .then(parseJSON)
        .then(checkStatus);
}