test_hal_gatsby/gatsby-node.js

const axios = require('axios');
const crypto = require('crypto');

exports.sourceNodes = async ({ boundActionCreators }) => {
  const { createNode } = boundActionCreators;

  const fetchEntry = () => axios.get("http://api.archives-ouvertes.fr/search/?q=docid:410979&fl=*");

  const res = await fetchEntry();

  r = res.data.response.docs[0];
  console.log("ddd");
  const articleNode = {
    id : "0",
    parent: `__SOURCE__`,
    internal:{
      type: `Truc`
    },
    children: [],
    // Custom data
    docid: r.docid,
    title: r.title_s[0],
    pages: r.page_s
  }

  const contentDigest = crypto
    .createHash(`md5`)
    .update(JSON.stringify(articleNode))
    .digest(`hex`);
  articleNode.internal.contentDigest = contentDigest;

  createNode(articleNode);


  return;
}