Bounce a file with GCF

index.js

const request = require('request');
const gcs = require('@google-cloud/storage')();
const uuid = require('uuid/v4');

const bucket = gcs.bucket('el-gato-functions');

exports.bounce = (req, res) => {
  const bounceUrl = req.get('bounceUrl') || 'https://www.googleapis.com/discovery/v1/apis/';
  console.log(`requesting ${bounceUrl}`);
  request(bounceUrl, (err, response, body) => {
    if (err) {
      console.error(err);
      return;
    }
    const data = JSON.parse(body);
    // this is where you can modify `data` if you need to
    const tempFileName = uuid();
    const file = bucket.file(tempFileName);
    let stream = file.createWriteStream()
      .on('error', (err) => {
        console.error("There was a problem uploading the file to GCS :(");
        console.error(err);
      })
      .on('finish', () => {
        console.log("File upload complete!");
        res.send(`Written to ${tempFileName}`);
      });
    stream.end(JSON.stringify(data));
  });
}