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feat(react-router): Serve the managed tunnel from a route in the server build - #25422

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logaretm merged 14 commits into
awad/tunnel-remixfrom
awad/tunnel-react-router
Oct 27, 2026
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logaretm merged 14 commits into
awad/tunnel-remixfrom
awad/tunnel-react-router

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@logaretm logaretm commented Oct 15, 2026 •

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React Router has no request hook, so to wire the tunnel logic, we add a resource route to the server build whose path comes from the DSN at runtime.

The base path is the app's basename, which the server build already exports. The tunnel-basepath e2e variants cover dev, prod and Cloudflare.

For reviewers: if you need an overview of what this is, refer to #25199.

closes #20255

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logaretm added this pull request to stack #25201 October 15, 2026 17:17
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size-limit report 📦

Compared: 957bffb (PR test merge using develop at 72b0363)

Against: ca4fc32 (develop) · base run #62950

⚠️ Baseline mismatch: 106 develop commit(s) in the PR build are missing from the baseline. Their size changes also affect this comparison. Compare commits. Re-run once develop's baseline build for 72b0363 finishes.

Path Size % Change Change
@sentry/browser 30.56 kB +2.18% +651 B 🔺
@sentry/browser - with treeshaking flags 28.54 kB +1.76% +491 B 🔺
@sentry/browser - with treeshaking flags tracing without tracing 28.42 kB +1.69% +470 B 🔺
@sentry/browser (incl. Tracing) 52.8 kB +1.35% +702 B 🔺
@sentry/browser (incl. Tracing + Span Streaming) 52.8 kB +1.35% +699 B 🔺
@sentry/browser (incl. Tracing, Profiling) 55.77 kB +1.31% +720 B 🔺
@sentry/browser (incl. Tracing, Replay) 92.47 kB +0.68% +621 B 🔺
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags 81.21 kB +0.61% +492 B 🔺
@sentry/browser (incl. Tracing, Replay with Canvas) 97.21 kB +0.66% +633 B 🔺
@sentry/browser (incl. Tracing, Replay, Feedback) 110.2 kB +0.63% +687 B 🔺
@sentry/browser (incl. Feedback) 48.12 kB +1.49% +703 B 🔺
@sentry/browser (incl. sendFeedback) 35.63 kB +1.9% +664 B 🔺
@sentry/browser (incl. FeedbackAsync) 40.76 kB +1.71% +684 B 🔺
@sentry/browser (incl. Metrics) 31.57 kB +2.05% +634 B 🔺
@sentry/browser (incl. Logs) 31.84 kB +2.02% +629 B 🔺
@sentry/browser (incl. Metrics & Logs) 32.52 kB +2.12% +673 B 🔺
@sentry/react 32.37 kB +1.99% +630 B 🔺
@sentry/react (incl. Tracing) 55.05 kB +1.17% +635 B 🔺
@sentry/vue 38.71 kB +1.7% +646 B 🔺
@sentry/vue (incl. Tracing) 55.75 kB +1.3% +715 B 🔺
@sentry/svelte 30.59 kB +2.2% +656 B 🔺
@sentry/remix (Remix 3 client bundle) 57.84 kB +1.27% +722 B 🔺
CDN Bundle 32.14 kB +1.5% +474 B 🔺
CDN Bundle (incl. Tracing) 53.09 kB +0.92% +480 B 🔺
CDN Bundle (incl. Logs, Metrics) 34.34 kB +1.4% +471 B 🔺
CDN Bundle (incl. Tracing, Logs, Metrics) 55.04 kB +0.89% +484 B 🔺
CDN Bundle (incl. Replay, Logs, Metrics) 75.29 kB +0.67% +499 B 🔺
CDN Bundle (incl. Tracing, Replay) 90.75 kB +0.53% +476 B 🔺
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) 92.69 kB +0.52% +479 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback) 96.89 kB +0.49% +470 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) 98.86 kB +0.5% +486 B 🔺
CDN Bundle - uncompressed 94.44 kB +1.24% +1.15 kB 🔺
CDN Bundle (incl. Tracing) - uncompressed 157.29 kB +0.74% +1.15 kB 🔺
CDN Bundle (incl. Logs, Metrics) - uncompressed 100.99 kB +1.16% +1.15 kB 🔺
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed 163.26 kB +0.72% +1.15 kB 🔺
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed 231.03 kB +0.51% +1.15 kB 🔺
CDN Bundle (incl. Tracing, Replay) - uncompressed 277.46 kB +0.42% +1.15 kB 🔺
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed 283.42 kB +0.41% +1.15 kB 🔺
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed 291.16 kB +0.4% +1.15 kB 🔺
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed 297.11 kB +0.39% +1.15 kB 🔺
@sentry/nextjs (client) 57.91 kB +1.05% +601 B 🔺
@sentry/sveltekit (client) 53.29 kB +1.55% +812 B 🔺
@sentry/core/server 43.52 kB +4.13% +1.73 kB 🔺
@sentry/core/browser 13.81 kB - -
@sentry/node 153.29 kB +0.44% +662 B 🔺
@sentry/node/import (ESM hook with diagnostics-channel injection) 81.58 kB - -
@sentry/node - without tracing 94.9 kB +0.69% +649 B 🔺
@sentry/node - without channel injection 133.92 kB +0.47% +616 B 🔺
@sentry/aws-serverless 103.15 kB +0.7% +710 B 🔺
@sentry/cloudflare (withSentry) - minified 213.13 kB +0.96% +2.02 kB 🔺
@sentry/cloudflare (withSentry) 528.73 kB +0.94% +4.9 kB 🔺
@sentry/nextjs/cloudflare (withSentry) - minified 232.75 kB +0.88% +2.01 kB 🔺

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@logaretm
logaretm force-pushed the awad/tunnel-react-router branch from 19cfdcb to e1da135 Compare October 15, 2026 17:36
@logaretm
logaretm force-pushed the awad/tunnel-react-router branch from e1da135 to 8bd81ed Compare October 15, 2026 17:44
@logaretm
logaretm force-pushed the awad/tunnel-react-router branch 2 times, most recently from 1404a52 to 45ea3d1 Compare October 15, 2026 18:26
@logaretm
logaretm force-pushed the awad/tunnel-react-router branch from 45ea3d1 to b227d1c Compare October 15, 2026 18:28
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logaretm force-pushed the awad/tunnel-react-router branch from b227d1c to 808fd83 Compare October 16, 2026 01:51
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@logaretm
logaretm force-pushed the awad/tunnel-react-router branch from 808fd83 to 7d51d31 Compare October 16, 2026 02:25
@logaretm
logaretm force-pushed the awad/tunnel-react-router branch from 7d51d31 to c8efd24 Compare October 16, 2026 03:32
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logaretm force-pushed the awad/tunnel-react-router branch 2 times, most recently from 94ce573 to 3d0c6ae Compare October 16, 2026 04:48
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logaretm force-pushed the awad/tunnel-react-router branch from 3d0c6ae to c5bc1f3 Compare October 16, 2026 14:00
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logaretm force-pushed the awad/tunnel-react-router branch from c5bc1f3 to 268adff Compare October 16, 2026 14:37
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logaretm requested review from mydea and s1gr1d October 19, 2026 19:37

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

Fix All in Cursor

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logaretm requested review from a team as code owners October 19, 2026 20:08
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logaretm requested review from JPeer264 and Lms24 and removed request for a team October 19, 2026 20:08
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logaretm force-pushed the awad/tunnel-react-router branch from 88b440e to c688a7c Compare October 19, 2026 20:08
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One or more gzipped bundles increased by more than 500 bytes. If this increase is intentional, add the Accept Bundlesize Increase label to this PR to rerun and accept the check.

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👋 @mydea, @Lms24, @JPeer264, @s1gr1d — Please review this PR when you get a chance!

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Optional E2E tests

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On the right track. Left some comments.

Comment thread packages/react-router/src/vite/makeTunnelRoutePlugin.ts Outdated
Comment thread packages/react-router/src/server/tunnelRoute.ts
Comment thread packages/react-router/src/client/sdk.ts
…er build

React Router has no request hook to answer from, so `sentryReactRouter()` adds a
resource route whose path is read from the DSN at runtime. React Router reads it
on its first request, so a request before `Sentry.init` keeps the tunnel off
until restart.
The tunnel handler now answers a request without one with a 411.
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React Router Framework managed tunnel

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