unpkg/server/utils/parsePackageURL.js

46 lines
1.1 KiB
JavaScript

const url = require('url')
const validatePackageName = require('./validatePackageName')
const URLFormat = /^\/((?:@[^\/@]+\/)?[^\/@]+)(?:@([^\/]+))?(\/.*)?$/
function decodeParam(param) {
if (param) {
try {
return decodeURIComponent(param)
} catch (error) {
// Ignore invalid params.
}
}
return ''
}
function parsePackageURL(packageURL) {
const { pathname, search, query } = url.parse(packageURL, true)
const match = URLFormat.exec(pathname)
// Disallow invalid URL formats.
if (match == null) return null
const packageName = match[1]
// Disallow invalid npm package names.
if (!validatePackageName(packageName)) return null
const packageVersion = decodeParam(match[2]) || 'latest'
const filename = decodeParam(match[3])
return {
// If the URL is /@scope/name@version/file.js?main=browser:
pathname, // /@scope/name@version/path.js
search, // ?main=browser
query, // { main: 'browser' }
packageName, // @scope/name
packageVersion, // version
filename // /file.js
}
}
module.exports = parsePackageURL