22 lines
724 B
JavaScript
22 lines
724 B
JavaScript
import { cacheControlFactory } from './cache-control.js'
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import { getLanguageCodeFromHeader } from './detect-language.js'
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import { PREFERRED_LOCALE_COOKIE_NAME } from '../lib/constants.js'
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const cacheControl = cacheControlFactory(0)
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const noCacheSurrogateControl = cacheControlFactory(0, {
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key: 'surrogate-control',
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maxAgeZero: true,
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})
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export default function fastRootRedirect(req, res, next) {
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if (!req.headers.cookie || !req.headers.cookie.includes(PREFERRED_LOCALE_COOKIE_NAME)) {
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// No preferred language cookie header!
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const language = getLanguageCodeFromHeader(req) || 'en'
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cacheControl(res)
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// See #2287
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noCacheSurrogateControl(res)
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return res.redirect(`/${language}`)
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}
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next()
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}
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