48 lines
1.2 KiB
JavaScript
48 lines
1.2 KiB
JavaScript
const validateNPMPackageName = require('validate-npm-package-name')
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const PackageURL = require('../PackageURL')
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const ValidQueryKeys = {
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main: true,
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meta: true,
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json: true // deprecated
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}
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function queryIsValid(query) {
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return Object.keys(query).every(function (key) {
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return ValidQueryKeys[key]
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})
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}
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/**
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* Parse and validate the URL.
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*/
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function parseURL(req, res, next) {
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const url = PackageURL.parse(req.url)
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if (url == null)
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return res.status(403).type('text').send(`Invalid URL: ${req.url}`)
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const nameErrors = validateNPMPackageName(url.packageName).errors
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// Do not allow invalid package names.
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if (nameErrors)
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return res.status(403).type('text').send(`Invalid package name: ${url.packageName} (${nameErrors.join(', ')})`)
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// Do not allow unrecognized query parameters because
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// some people use them to bust the cache.
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if (!queryIsValid(url.query))
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return res.status(403).type('text').send(`Invalid query: ${url.search}`)
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req.packageName = url.packageName
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req.packageVersion = url.packageVersion
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req.packageSpec = `${req.packageName}@${req.packageVersion}`
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req.pathname = url.pathname
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req.filename = url.filename
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req.search = url.search
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req.query = url.query
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next()
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}
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module.exports = parseURL
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