fix(@angular/build): allow non-prefixed requests when using SSR and base href #32137
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…ase href When using SSR with a configured baseHref, the Vite dev server's default base middleware would intercept and reject requests that did not start with the base path. This created a mismatch with production behavior, where such requests (e.g., health check endpoints or custom routes defined in server.ts) could be handled correctly without the base prefix. This change patches the Vite base middleware to allow requests that do not match the base path to proceed, enabling them to be handled by subsequent middlewares like the Angular SSR middleware. Fixes angular#31896
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| const { pathname, hash, search } = new URL(url, 'http://localhost'); | ||
| if (pathname === '/' || pathname === '/index.html') { | ||
| res.writeHead(302, { Location: `${base}${search}${hash}` }); | ||
| res.end(); | ||
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|
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| return; | ||
| } |
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Would the existing fallback middleware handle this case?
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Yes, the existing middleware handle this https://github.com/vitejs/vite/blob/e81c183f8c8ccaf7774ef0d0ee125bf63dbf30b4/packages/vite/src/node/server/middlewares/base.ts#L29-L36
The problem with the existing middleware is anything below https://github.com/vitejs/vite/blob/e81c183f8c8ccaf7774ef0d0ee125bf63dbf30b4/packages/vite/src/node/server/middlewares/base.ts#L38
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When using SSR with a configured baseHref, the Vite dev server's default base middleware would intercept and reject requests that did not start with the base path. This created a mismatch with production behavior, where such requests (e.g., health check endpoints or custom routes defined in server.ts) could be handled correctly without the base prefix.
This change patches the Vite base middleware to allow requests that do not match the base path to proceed, enabling them to be handled by subsequent middlewares like the Angular SSR middleware.
Fixes #31896