/
base.ts
52 lines (46 loc) · 1.64 KB
/
base.ts
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import type { Connect } from 'dep-types/connect'
import type { ViteDevServer } from '..'
import { joinUrlSegments, stripBase } from '../../utils'
// this middleware is only active when (base !== '/')
export function baseMiddleware({
config
}: ViteDevServer): Connect.NextHandleFunction {
// Keep the named function. The name is visible in debug logs via `DEBUG=connect:dispatcher ...`
return function viteBaseMiddleware(req, res, next) {
const url = req.url!
const parsed = new URL(url, 'http://vitejs.dev')
const path = parsed.pathname || '/'
const base = config.rawBase
if (path.startsWith(base)) {
// rewrite url to remove base. this ensures that other middleware does
// not need to consider base being prepended or not
req.url = stripBase(url, base)
return next()
}
// skip redirect and error fallback on middleware mode, #4057
if (config.server.middlewareMode) {
return next()
}
if (path === '/' || path === '/index.html') {
// redirect root visit to based url with search and hash
res.writeHead(302, {
Location: base + (parsed.search || '') + (parsed.hash || '')
})
res.end()
return
} else if (req.headers.accept?.includes('text/html')) {
// non-based page visit
const redirectPath =
url + '/' !== base ? joinUrlSegments(base, url) : base
res.writeHead(404, {
'Content-Type': 'text/html'
})
res.end(
`The server is configured with a public base URL of ${base} - ` +
`did you mean to visit <a href="${redirectPath}">${redirectPath}</a> instead?`
)
return
}
next()
}
}