1const fetch = require('make-fetch-happen')
2const { promises: fs } = require('graceful-fs')
3const log = require('./log')
4
5async function download (gyp, url) {
6  log.http('GET', url)
7
8  const requestOpts = {
9    headers: {
10      'User-Agent': `node-gyp v${gyp.version} (node ${process.version})`,
11      Connection: 'keep-alive'
12    },
13    proxy: gyp.opts.proxy,
14    noProxy: gyp.opts.noproxy
15  }
16
17  const cafile = gyp.opts.cafile
18  if (cafile) {
19    requestOpts.ca = await readCAFile(cafile)
20  }
21
22  const res = await fetch(url, requestOpts)
23  log.http(res.status, res.url)
24
25  return res
26}
27
28async function readCAFile (filename) {
29  // The CA file can contain multiple certificates so split on certificate
30  // boundaries.  [\S\s]*? is used to match everything including newlines.
31  const ca = await fs.readFile(filename, 'utf8')
32  const re = /(-----BEGIN CERTIFICATE-----[\S\s]*?-----END CERTIFICATE-----)/g
33  return ca.match(re)
34}
35
36module.exports = {
37  download,
38  readCAFile
39}
40