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Make SPA fallback try each directory component #20839

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Make SPA fallback try each directory component #20839

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16 changes: 14 additions & 2 deletions packages/vite/src/node/server/middlewares/htmlFallback.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -63,8 +63,20 @@ export function htmlFallbackMiddleware(
}

if (spaFallback) {
debug?.(`Rewriting ${req.method} ${req.url} to /index.html`)
req.url = '/index.html'
// remove a path component at a time from pathname and check for
// the presence of a corresponding index.html
let workingPathname = pathname
while (true) {
const filePath = path.join(root, workingPathname, 'index.html')
if (fs.existsSync(filePath)) {
const newUrl = workingPathname + '/index.html'
debug?.(`Rewriting ${req.method} ${req.url} to ${newUrl}`)
req.url = newUrl
return next()
}
if (workingPathname === '/') break
workingPathname = path.dirname(workingPathname)
}
}

next()
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