unpkg/server/middleware/parseURL.js

const { parsePackageURL } = require('./PackageUtils')

/**
 * Parse and validate the URL.
 */
function parseURL(req, res, next) {
  let url
  try {
    url = parsePackageURL(req.url)
  } catch (error) {
    return res.status(403).send(`Invalid URL: ${req.url}`)
  }

  if (url == null)
    return res.status(403).send(`Invalid URL: ${req.url}`)

  req.packageName = url.packageName
  req.packageVersion = url.packageVersion
  req.packageSpec = `${req.packageName}@${req.packageVersion}`
  req.pathname = url.pathname
  req.filename = url.filename
  req.search = url.search
  req.query = url.query

  next()
}

module.exports = parseURL