nodejs-storage: HTTPS_PROXY with HTTP Proxy and google HTTPS URLs does not work.

Environment details

• OS: all
• Node.js version: 8.11.3
• npm version: 5.6.0
• @google-cloud/storage version: 1.7.0 (1.5.2 is fine)

Steps to reproduce

1. Setup HTTP Proxy
2. Start NodeJS with ENV

HTTPS_PROXY=http://proxy... node script.js

1. upload file to bucket (script.js)

const storage = require('@google-cloud/storage')({
  projectId: 'projectid',
  keyFilename: 'gcloud.json',
});

const bucketname = 'bucketname';
const bucket = storage.bucket(bucketname);

const file = bucket.file('foo');
const stream = file.createWriteStream();
stream.on('error', console.log);
stream.on('finish', console.log);
stream.end('bar');

Information on the root-cause

nodejs-storage uses

• https://github.com/google/google-auth-library-nodejs

which uses gcs-resumable-upload

• https://github.com/stephenplusplus/gcs-resumable-upload

which uses axios and the issue:

• https://github.com/google/google-auth-library-nodejs/issues/352

issues at axios

• https://github.com/axios/axios/issues/925
• https://github.com/axios/axios/issues/1371

pullrequest (open since 1 year caused by bad weather)

• https://github.com/axios/axios/pull/959