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'use strict'
const BB = require('bluebird')
const fetch = require('./fetch')
const manifest = require('./manifest')
const optCheck = require('../../util/opt-check')
const PassThrough = require('stream').PassThrough
const pickRegistry = require('./pick-registry')
const pipe = BB.promisify(require('mississippi').pipe)
const ssri = require('ssri')
const url = require('url')
module.exports = tarball
function tarball (spec, opts) {
opts = optCheck(opts)
const stream = new PassThrough()
manifest(spec, opts).then(manifest => {
stream.emit('manifest', manifest)
return pipe(
fromManifest(manifest, spec, opts).on(
'integrity', i => stream.emit('integrity', i)
),
stream
)
}).catch(err => stream.emit('error', err))
return stream
}
module.exports.fromManifest = fromManifest
function fromManifest (manifest, spec, opts) {
opts = optCheck(opts)
opts.scope = spec.scope || opts.scope
const stream = new PassThrough()
const registry = pickRegistry(spec, opts)
const uri = getTarballUrl(registry, manifest)
fetch(uri, registry, Object.assign({
headers: {
'pacote-req-type': 'tarball',
'pacote-pkg-id': `registry:${
spec.type === 'remote'
? spec
: `${manifest.name}@${manifest.version}`
}`
},
integrity: manifest._integrity,
algorithms: [
manifest._integrity
? ssri.parse(manifest._integrity).pickAlgorithm()
: 'sha1'
],
spec
}, opts)).then(res => {
const hash = res.headers.get('x-local-cache-hash')
if (hash) {
stream.emit('integrity', decodeURIComponent(hash))
}
res.body.on('error', err => stream.emit('error', err))
res.body.pipe(stream)
}).catch(err => stream.emit('error', err))
return stream
}
function getTarballUrl (registry, manifest) {
// https://github.com/npm/npm/pull/9471
//
// TL;DR: Some alternative registries host tarballs on http and packuments on
// https, and vice-versa. There's also a case where people who can't use SSL
// to access the npm registry, for example, might use
// `--registry=http://registry.npmjs.org/`. In this case, we need to rewrite
// `tarball` to match the protocol.
//
const reg = url.parse(registry)
const tarball = url.parse(manifest._resolved)
if (reg.hostname === tarball.hostname && reg.protocol !== tarball.protocol) {
tarball.protocol = reg.protocol
// Ports might be same host different protocol!
if (reg.port !== tarball.port) {
delete tarball.host
tarball.port = reg.port
}
delete tarball.href
}
return url.format(tarball)
}