Webhook Download PDF

index.js

'use strict';
const config = {
  projectUrl: 'http://localhost:3000',
  apiKey: '23423423lkj234ljk234lkj234lkj23'
};

const express = require('express');
const bodyParser = require('body-parser');
const methodOverride = require('method-override');
const fetch = require('node-fetch');
const fs = require('fs');

// Creat eour application.
const app = express();

// Add Middleware necessary for REST API's
app.use(bodyParser.urlencoded({extended: true}));
app.use(bodyParser.json());
app.use(methodOverride('X-HTTP-Method-Override'));

function download(url, filename) {
  return fetch(url).then((res) => {
    return new Promise((resolve, reject) => {
      const fileStream = fs.createWriteStream(filename);
      res.body.pipe(fileStream);
      res.body.on("error", (err) => {
        reject(err);
      });
      fileStream.on("finish", function() {
        resolve();
      });
    });
  });
}

app.post('/*', (req, res, next) => {
  fetch(`http://${config.projectUrl}/project/${req.body.submission.project}/token`, {
    headers: {
      'x-allow': `GET:/project/${req.body.submission.project}/form/${req.body.submission.form}/submission/${req.body.submission._id}/download`,
      'x-expire': 3600,
      'x-token': config.apiKey
    }
  })
    .then(res => res.json())
    .then(json => {
      download(`http://${config.projectUrl}/project/${req.body.submission.project}/form/${req.body.submission.form}/submission/${req.body.submission._id}/download?token=${json.key}`, `./${req.body.submission._id}.pdf`).then(() => {
        console.log('Download complete');
      });
    });
  next();
})

module.exports = app;