22 lines
544 B
JavaScript
22 lines
544 B
JavaScript
const defaultResponse = 'User-agent: *'
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const disallowAll = `User-agent: *
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Disallow: /`
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export default function robots(req, res, next) {
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if (req.path !== '/robots.txt') return next()
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res.type('text/plain')
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// remove subdomain from host
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// docs-internal-12345--branch-name.herokuapp.com -> herokuapp.com
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const rootDomain = req.hostname.split('.').slice(1).join('.')
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// prevent crawlers from indexing staging apps
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if (rootDomain === 'herokuapp.com') {
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return res.send(disallowAll)
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}
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return res.send(defaultResponse)
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}
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