Function lang

Creates a middleware, that tries to get the current language from 'Accept-Language' HTTP header and writes it to 'lang' property of request context.

Example

import assert from 'assert'
import createServer, { IHttpRequest, IHttpResponse, lang } from '@egomobile/http-server'

const app = createServer()

// try submit 'Accept-Language' HTTP header
// with 'de, en-GB;q=0.85, en;q=0.9'
app.get('/', [lang('de', 'en')], async (request, response) => {
  assert.strictEqual(request.lang, 'de')
})
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