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Added note about why Next.js used 307 and 308 status codes #35325

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merged 3 commits into from Mar 19, 2022
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Added note about why Next.js used 307 and 308 status codes #35325

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Added note about why Next.js used 307 and 308 status codes
molebox Mar 15, 2022
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Apply suggestions from code review
ijjk Mar 19, 2022
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Merge branch 'canary' into additional-redirect-note
kodiakhq[bot] Mar 19, 2022
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3 changes: 3 additions & 0 deletions docs/api-reference/next.config.js/redirects.md
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Expand Up @@ -44,6 +44,9 @@ module.exports = {
- `source` is the incoming request path pattern.
- `destination` is the path you want to route to.
- `permanent` `true` or `false` - if `true` will use the 308 status code which instructs clients/search engines to cache the redirect forever, if `false` will use the 307 status code which is temporary and is not cached.

> **Why does Next.js use 307 and 308?** Traditionally a 302 was used for a temporary redirect, and a 301 for a permanent redirect, but many browsers changed the request method of the redirect to `GET`, regardless of the original method. For example, if the browser made a request to `POST /v1/users` which returned status code `302` with location `/v2/users`, the subsequent request might be `GET /v2/users` instead of the expected `POST /v2/users`. Next.js uses the 307 temporary redirect, and 308 permanent redirect status codes to explicitly preserve the request method used.

- `basePath`: `false` or `undefined` - if false the basePath won't be included when matching, can be used for external rewrites only.
- `locale`: `false` or `undefined` - whether the locale should not be included when matching.
- `has` is an array of [has objects](#header-cookie-and-query-matching) with the `type`, `key` and `value` properties.
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