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Next.js strips the basePath from req.url before running Pages Router data fetchers and API routes, so captured errors reported a request url without it. Use the originally requested path and query from Next.js' initURL request meta instead, keeping the origin from the request headers. Fixes #24975 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Next.js removes the
basePathfromreq.urlbefore running Pages Router data fetchers and API routes. So errors captured there reported arequest.urlwithout it, for examplehttp://localhost:3000/foo/barinstead ofhttp://localhost:3000/base/foo/bar.Next keeps the URL as it was originally requested in its internal request meta (
initURL), set before thebasePathis removed. We now take the path and query from there. The origin still comes from the request headers, because Next builds the absoluteinitURLfrom its own hostname and port, which can differ from the public host behind a proxy. API routes were affected the same way, so they're covered too.Fixes #24975