/
base.ts
66 lines (60 loc) · 1.86 KB
/
base.ts
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import type { Connect } from 'dep-types/connect'
import {
cleanUrl,
joinUrlSegments,
stripBase,
withTrailingSlash,
} from '../../utils'
// this middleware is only active when (base !== '/')
export function baseMiddleware(
rawBase: string,
middlewareMode: boolean,
): 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 pathname = cleanUrl(url)
const base = rawBase
if (pathname.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 (middlewareMode) {
return next()
}
if (pathname === '/' || pathname === '/index.html') {
// redirect root visit to based url with search and hash
res.writeHead(302, {
Location: base + url.slice(pathname.length),
})
res.end()
return
}
// non-based page visit
const redirectPath =
withTrailingSlash(url) !== base ? joinUrlSegments(base, url) : base
if (req.headers.accept?.includes('text/html')) {
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
} else {
// not found for resources
res.writeHead(404, {
'Content-Type': 'text/plain',
})
res.end(
`The server is configured with a public base URL of ${base} - ` +
`did you mean to visit ${redirectPath} instead?`,
)
return
}
}
}