unpkg/server/utils/fetchNpmPackage.js

47 lines
1.2 KiB
JavaScript

const url = require("url");
const https = require("https");
const gunzip = require("gunzip-maybe");
const tar = require("tar-stream");
const bufferStream = require("./bufferStream");
const agent = require("./registryAgent");
function fetchNpmPackage(packageConfig) {
return new Promise((resolve, reject) => {
const tarballURL = packageConfig.dist.tarball;
console.log(
`info: Fetching package for ${packageConfig.name} from ${tarballURL}`
);
const { hostname, pathname } = url.parse(tarballURL);
const options = {
agent: agent,
hostname: hostname,
path: pathname
};
https
.get(options, res => {
if (res.statusCode === 200) {
resolve(res.pipe(gunzip()).pipe(tar.extract()));
} else {
bufferStream(res).then(data => {
const spec = `${packageConfig.name}@${packageConfig.version}`;
const content = data.toString("utf-8");
const error = new Error(
`Failed to fetch tarball for ${spec}\nstatus: ${
res.statusCode
}\ndata: ${content}`
);
reject(error);
});
}
})
.on("error", reject);
});
}
module.exports = fetchNpmPackage;