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feat(core): Limit the body size of tunnel requests - #25515
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#25515's 411 and 413 checks run before the header line is read, so an oversized or unlengthed request is rejected without reading its body.
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#25515's 411 and 413 checks run before the header line is read, so an oversized or unlengthed request is rejected without reading its body.
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The tunnel route handlers (
@sentry/nextjs/tunneland TanStack Start'screateSentryTunnelRoute) now check the request size before they read the body.A request larger than 20 MiB gets a 413, and a request without
Content-Lengthgets a 411. So one request can no longer make the server hold more than 20 MiB in memory. SDK envelopes are much smaller than this limit, so normal traffic does not change.Checking the header is enough, because the HTTP server stops reading the body at
Content-Length.Stacked on #25456.