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Zack TannerandGitHub
53a20d7a35
### What When using middleware + i18n in pages router, and upon navigation to a dynamic route, the wrong locale would be served in `getServerSideProps`. ### Why The route resolver code handles detecting the initial locale by splitting the path and looking at the first non-empty index to determine which locale was set. However, it does this assuming it has a regular path name, and not a `/_next/data` URL. When middleware is present, the route resolver code hits the `middleware_next_data` branch, which doesn't have any logic to properly set the locale. This means that resolveRoutes will return the default locale rather than the locale from the path. In the non-middleware case, this would normally flow through `handleNextDataRequest` in base-server which has handling to infer i18n via `i18nProvider`. This branch is functionally very similar to what we're doing in `resolveRoutes` but it does so in a different way: it reconstructs the URL without the `/_next/data` information and then attaches locale information. However because `middleware_next_data` rewrites the pathname to the actual route (ie `/_next/data/development/foo.json` -> `/foo`), `handleNextDataRequest` won't handle that request since it's no longer a data request. It's strange to me that `handleNextDataRequest` and `middleware_next_data` are doing similar path normalization in completely different ways, but that was a deeper rabbit hole and simply removing the normalization logic in `resolveRoutes` causes other problems. ### How Since data requests that flow through this middleware matcher logic aren't going to be handled by `handleNextDataRequest`, I've updated `middleware_next_data` to perform the logic of attaching the locale information to the query. Initially I was going to do this for anything that calls `normalizeLocalePath` but it seems like other branches of `resolveRoutes` do it in the matcher function directly. Fixes #54217 Closes NDX-116
12 lines
213 B
JavaScript
12 lines
213 B
JavaScript
export const getServerSideProps = async ({ locale }) => {
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return {
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props: {
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locale,
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},
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}
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}
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export default function Static({ locale }) {
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return <div id="static-locale">Locale: {locale}</div>
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}
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