gatsby-source-strapi/dist/axios-instance.js

Gatsby source plugin for building websites using Strapi as a data source

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
exports.__esModule = true;
exports.createAxiosInstance = void 0;
var _axios = _interopRequireDefault(require("axios"));
/**
 * Inspiration from:
 * https://gist.github.com/matthewsuan/2bdc9e7f459d5b073d58d1ebc0613169
 *
 * @param {AxiosInstance} axiosInstance
 * @param {number} maxParallelRequests
 */
const throttlingInterceptors = (axiosInstance, maxParallelRequests) => {
  const INTERVAL_MS = 50; // Wait time until retrying request
  let PENDING_REQUESTS = 0;

  /** Axios Request Interceptor */
  axiosInstance.interceptors.request.use(function (config) {
    return new Promise(resolve => {
      let interval = setInterval(() => {
        if (PENDING_REQUESTS < maxParallelRequests) {
          PENDING_REQUESTS++;
          clearInterval(interval);
          resolve(config);
        }
      }, INTERVAL_MS);
    });
  });

  /** Axios Response Interceptor */
  axiosInstance.interceptors.response.use(function (response) {
    PENDING_REQUESTS = Math.max(0, PENDING_REQUESTS - 1);
    return Promise.resolve(response);
  }, function (error) {
    PENDING_REQUESTS = Math.max(0, PENDING_REQUESTS - 1);
    return Promise.reject(error);
  });
};

/**
 *
 * @param {Object} strapiConfig - Strapi configuration object
 * @param {string} strapiConfig.apiURL - Strapi API endpoint
 * @param {Object|undefined} strapiConfig.headers - Headers to be sent with each request
 * @param {number|undefined} strapiConfig.maxParallelRequests - Number of parallel requests
 * @param {string} strapiConfig.accessToken - Strapi access token
 * @returns {AxiosInstance}
 */
const createAxiosInstance = strapiConfig => {
  const {
    maxParallelRequests = Number.POSITIVE_INFINITY,
    headers = {},
    accessToken,
    apiURL
  } = strapiConfig;
  if (accessToken) {
    headers.authorization = `Bearer ${accessToken}`;
  }
  const instance = _axios.default.create({
    baseURL: apiURL,
    headers
  });

  /** Add throttling interceptors */
  throttlingInterceptors(instance, maxParallelRequests);
  return instance;
};
exports.createAxiosInstance = createAxiosInstance;