feat(sveltekit): Serve the managed tunnel from `sentryHandle` under the app's base path by logaretm · Pull Request #25415 · getsentry/sentry-javascript

logaretm · 2026-10-15T15:33:50Z

Implements sveltekit tunnel wiring, the way it works is:

Our Vite plugin injects the base path (kit.paths.base) if it exists to both server/client bundles.
Our entry handler (sentryHandle) will check for any incoming request if it is a tunneled one, and if it matches it handles it.

(I made the decision to respect base paths rather than ignoring them, this is something to review in #25199)

This also adds a couple of shared e2e helpers to @sentry-internal/test-utils that the rest of the stack uses. The sveltekit-3 tunnel variants cover dev and prod, and there's one for Cloudflare Workers too.

closes #20256

github-actions · 2026-10-15T15:44:53Z

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	30.53 kB	+2.18%	+649 B 🔺
@sentry/browser - with treeshaking flags	28.51 kB	+1.75%	+490 B 🔺
@sentry/browser - with treeshaking flags tracing without tracing	28.39 kB	+1.7%	+473 B 🔺
@sentry/browser (incl. Tracing)	52.77 kB	+1.35%	+699 B 🔺
@sentry/browser (incl. Tracing + Span Streaming)	52.77 kB	+1.35%	+698 B 🔺
@sentry/browser (incl. Tracing, Profiling)	55.74 kB	+1.32%	+721 B 🔺
@sentry/browser (incl. Tracing, Replay)	92.44 kB	+0.68%	+616 B 🔺
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	81.18 kB	+0.62%	+496 B 🔺
@sentry/browser (incl. Tracing, Replay with Canvas)	97.18 kB	+0.66%	+629 B 🔺
@sentry/browser (incl. Tracing, Replay, Feedback)	110.17 kB	+0.63%	+683 B 🔺
@sentry/browser (incl. Feedback)	48.09 kB	+1.48%	+699 B 🔺
@sentry/browser (incl. sendFeedback)	35.6 kB	+1.9%	+662 B 🔺
@sentry/browser (incl. FeedbackAsync)	40.73 kB	+1.71%	+683 B 🔺
@sentry/browser (incl. Metrics)	31.54 kB	+2.05%	+633 B 🔺
@sentry/browser (incl. Logs)	31.81 kB	+2.01%	+626 B 🔺
@sentry/browser (incl. Metrics & Logs)	32.48 kB	+2.11%	+670 B 🔺
@sentry/react	32.33 kB	+2%	+631 B 🔺
@sentry/react (incl. Tracing)	55.02 kB	+1.17%	+633 B 🔺
@sentry/vue	38.68 kB	+1.7%	+643 B 🔺
@sentry/vue (incl. Tracing)	55.72 kB	+1.31%	+716 B 🔺
@sentry/svelte	30.56 kB	+2.2%	+657 B 🔺
@sentry/remix (Remix 3 client bundle)	57.8 kB	+1.26%	+715 B 🔺
CDN Bundle	32.11 kB	+1.49%	+470 B 🔺
CDN Bundle (incl. Tracing)	53.06 kB	+0.91%	+478 B 🔺
CDN Bundle (incl. Logs, Metrics)	34.31 kB	+1.41%	+474 B 🔺
CDN Bundle (incl. Tracing, Logs, Metrics)	55.01 kB	+0.89%	+483 B 🔺
CDN Bundle (incl. Replay, Logs, Metrics)	75.26 kB	+0.66%	+492 B 🔺
CDN Bundle (incl. Tracing, Replay)	90.73 kB	+0.53%	+478 B 🔺
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)	92.66 kB	+0.52%	+479 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback)	96.87 kB	+0.49%	+468 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)	98.83 kB	+0.5%	+489 B 🔺
CDN Bundle - uncompressed	94.33 kB	+1.24%	+1.15 kB 🔺
CDN Bundle (incl. Tracing) - uncompressed	157.19 kB	+0.74%	+1.15 kB 🔺
CDN Bundle (incl. Logs, Metrics) - uncompressed	100.87 kB	+1.16%	+1.15 kB 🔺
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed	163.14 kB	+0.72%	+1.15 kB 🔺
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed	230.91 kB	+0.51%	+1.15 kB 🔺
CDN Bundle (incl. Tracing, Replay) - uncompressed	277.35 kB	+0.42%	+1.15 kB 🔺
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed	283.3 kB	+0.41%	+1.15 kB 🔺
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	291.06 kB	+0.4%	+1.15 kB 🔺
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed	296.99 kB	+0.39%	+1.15 kB 🔺
@sentry/nextjs (client)	57.35 kB	+1.09%	+613 B 🔺
@sentry/sveltekit (client)	53.26 kB	+1.54%	+806 B 🔺
@sentry/core/server	42.85 kB	+4.08%	+1.68 kB 🔺
@sentry/core/browser	13.81 kB	-	-
@sentry/node	155.79 kB	+0.42%	+649 B 🔺
@sentry/node/import (ESM hook with diagnostics-channel injection)	84.06 kB	-	-
@sentry/node - without tracing	97.47 kB	+0.69%	+661 B 🔺
@sentry/node - without channel injection	133.8 kB	+0.47%	+623 B 🔺
@sentry/aws-serverless	105.74 kB	+0.69%	+723 B 🔺
@sentry/cloudflare (withSentry) - minified	212.9 kB	+0.96%	+2.01 kB 🔺
@sentry/cloudflare (withSentry)	528.07 kB	+0.94%	+4.9 kB 🔺
@sentry/nextjs/cloudflare (withSentry) - minified	232.52 kB	+0.88%	+2.01 kB 🔺

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logaretm · 2026-10-15T21:56:04Z

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…he app's base path `sentryHandle` answers tunnel requests before isolation, tracing and routing. `sentrySvelteKit()` hands `paths.base` to the client and server SDKs, so `tunnel: true` works under a base path without repeating it.

…racing on

The tunnel handler now answers a request without one with a 411.

…, in one test per app

…ests of what the SDK adds

…dules as side-effect free

logaretm added this pull request to stack #25201 October 15, 2026 15:33

logaretm force-pushed the awad/tunnel-sveltekit branch 2 times, most recently from 364f99c to b6212f2 Compare October 15, 2026 15:36

logaretm force-pushed the awad/tunnel-sveltekit branch 2 times, most recently from de28310 to 47c1f76 Compare October 15, 2026 16:20

logaretm force-pushed the awad/tunnel-sveltekit branch from 47c1f76 to d1a7e32 Compare October 15, 2026 16:38

logaretm force-pushed the awad/tunnel-sveltekit branch from d1a7e32 to 17f5b0c Compare October 15, 2026 17:15

logaretm force-pushed the awad/tunnel-sveltekit branch from 17f5b0c to ff9f3cc Compare October 15, 2026 17:36

logaretm force-pushed the awad/tunnel-sveltekit branch 2 times, most recently from 7185904 to 0846a80 Compare October 15, 2026 18:16

logaretm force-pushed the awad/tunnel-sveltekit branch from 0846a80 to 2d31aba Compare October 15, 2026 18:26

logaretm force-pushed the awad/tunnel-sveltekit branch from 2d31aba to d7b1800 Compare October 15, 2026 18:28

cursor Bot reviewed Oct 15, 2026

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Comment thread packages/sveltekit/test/vite/tunnelBasePath.test.ts

Comment thread dev-packages/e2e-tests/test-applications/sveltekit-3/tests/tunnel.test.ts Outdated

logaretm force-pushed the awad/tunnel-sveltekit branch from d7b1800 to 1d49365 Compare October 16, 2026 01:51

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Comment thread packages/sveltekit/src/vite/tunnelBasePath.ts Outdated

logaretm force-pushed the awad/tunnel-sveltekit branch from 1d49365 to 89e93d5 Compare October 16, 2026 02:25

logaretm force-pushed the awad/tunnel-sveltekit branch 3 times, most recently from d0e1a76 to 05c691a Compare October 19, 2026 18:36

logaretm force-pushed the awad/tunnel-sveltekit branch from 05c691a to 36f589a Compare October 19, 2026 19:12

logaretm marked this pull request as ready for review October 19, 2026 19:36

logaretm requested a review from a team as a code owner October 19, 2026 19:36

logaretm requested review from chargome and s1gr1d and removed request for a team October 19, 2026 19:36

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Comment thread dev-packages/e2e-tests/test-applications/sveltekit-3/tests/tunnel.test.ts Outdated

Comment thread dev-packages/e2e-tests/test-applications/sveltekit-3/tests/tunnel.test.ts Outdated

Comment thread packages/sveltekit/src/vite/tunnelBasePath.ts Outdated

logaretm requested review from a team as code owners October 19, 2026 20:07

logaretm requested review from JPeer264 and isaacs and removed request for a team October 19, 2026 20:08

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Comment thread dev-packages/test-utils/src/tunnel.ts

logaretm added 10 commits October 20, 2026 10:29

fix(sveltekit): Keep source maps of the hooks files under a base path

8ea7904

fix(sveltekit): Serve a relative tunnel path under the base path too

a86ae86

test(sveltekit): Check the managed tunnel under vite dev too

cdedc8b

test(sveltekit): Check no span of a tunnel request is sent with Kit t…

af37c26

…racing on

ref(sveltekit): Import the tunnel handler from @sentry/core/server

8eb76b3

test(sveltekit): Send Content-Length with the tunnel test requests

4d98f97

The tunnel handler now answers a request without one with a 411.

test(sveltekit): Race the tunnel span with a shared test-utils helper…

a83ae92

…, in one test per app

ref(sveltekit): Let core skip an empty base path, and keep only the t…

011450a

…ests of what the SDK adds

fix(sveltekit): Keep the base path module when tree-shaking treats mo…

ccdb232

…dules as side-effect free

logaretm mentioned this pull request Oct 20, 2026

feat(core): Add managed tunnel helpers that derive the tunnel path from the DSN #25199

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feat(sveltekit): Serve the managed tunnel from `sentryHandle` under the app's base path - #25415

feat(sveltekit): Serve the managed tunnel from `sentryHandle` under the app's base path#25415
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