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ref(deno): Use a shared request handler wrapper for Deno.serve - #25586

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isaacschlueter/js-3975-share-one-request-handler-wrapper-across-denoserve-bunserve

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@isaacs isaacs commented Oct 20, 2026 •

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Deno.serve, Bun.serve and Cloudflare each wrap a web Request handler with their own copy of the same steps: request data and body, the http.server span, streamed responses, errors and sessions. The copies drift, so a fix in one runtime does not reach the others.

This adds wrapServerRequestHandler to @sentry/server-utils and moves Deno.serve onto it. Bun.serve and Cloudflare follow in separate PRs, so each runtime's changes can be reviewed alone. The wrapper has only what Deno needs today, and the next PRs extend it. It is exported from the shared entry, so the Node-free @sentry/server-utils/no-diagnostic-channels entry can use it too.

The rules follow core's node:http server code. OPTIONS and HEAD requests get no span and no body capture, but still get request data, a session and error capture. The static asset filter applies only to GET. For streamed responses, the wrapper uses the stream monitor from the Bun SDK, which reads only when the client pulls and reports errors from the stream source. It replaces Deno's own copy, which read ahead of the client and ignored source errors.

The existing Deno tests pass with no change. Visible changes for Deno:

  • An error from the source of a streamed response is now captured, and the span gets an error status.
  • The SDK no longer reads a streamed response ahead of the client.
  • Errors in OPTIONS and HEAD requests now carry the request data.
  • client.address is no longer set to the path of a Unix socket.

Part of #25577
Part of JS-3975

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linear-code Bot commented Oct 20, 2026

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JS-3975

@isaacs
isaacs added this pull request to stack #25589 October 20, 2026 22:30

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Stale Bugbot comment from a previous run.

Comment thread packages/server-utils/src/utils/wrapServerRequestHandler.ts Outdated
Comment thread packages/server-utils/test/utils/wrapServerRequestHandler.test.ts Outdated
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size-limit report 📦

Path Size % Change Change
@sentry/browser 29.88 kB - -
@sentry/browser - with treeshaking flags 28.02 kB - -
@sentry/browser - with treeshaking flags tracing without tracing 27.92 kB - -
@sentry/browser (incl. Tracing) 52.07 kB - -
@sentry/browser (incl. Tracing + Span Streaming) 52.07 kB - -
@sentry/browser (incl. Tracing, Profiling) 55.02 kB - -
@sentry/browser (incl. Tracing, Replay) 91.82 kB - -
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags 80.68 kB - -
@sentry/browser (incl. Tracing, Replay with Canvas) 96.55 kB - -
@sentry/browser (incl. Tracing, Replay, Feedback) 109.49 kB - -
@sentry/browser (incl. Feedback) 47.4 kB - -
@sentry/browser (incl. sendFeedback) 34.94 kB - -
@sentry/browser (incl. FeedbackAsync) 40.05 kB - -
@sentry/browser (incl. Metrics) 30.9 kB - -
@sentry/browser (incl. Logs) 31.18 kB - -
@sentry/browser (incl. Metrics & Logs) 31.81 kB - -
@sentry/react 31.7 kB - -
@sentry/react (incl. Tracing) 54.39 kB - -
@sentry/vue 38.04 kB - -
@sentry/vue (incl. Tracing) 55.01 kB - -
@sentry/svelte 29.9 kB - -
@sentry/remix (Remix 3 client bundle) 57.08 kB - -
CDN Bundle 31.64 kB - -
CDN Bundle (incl. Tracing) 52.58 kB - -
CDN Bundle (incl. Logs, Metrics) 33.84 kB - -
CDN Bundle (incl. Tracing, Logs, Metrics) 54.52 kB - -
CDN Bundle (incl. Replay, Logs, Metrics) 74.77 kB - -
CDN Bundle (incl. Tracing, Replay) 90.25 kB - -
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) 92.18 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback) 96.4 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) 98.34 kB - -
CDN Bundle - uncompressed 93.18 kB - -
CDN Bundle (incl. Tracing) - uncompressed 156.03 kB - -
CDN Bundle (incl. Logs, Metrics) - uncompressed 99.72 kB - -
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed 161.99 kB - -
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed 229.76 kB - -
CDN Bundle (incl. Tracing, Replay) - uncompressed 276.2 kB - -
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed 282.14 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed 289.9 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed 295.84 kB - -
@sentry/nextjs (client) 57.28 kB - -
@sentry/sveltekit (client) 52.45 kB - -
@sentry/core/server 41.75 kB - -
@sentry/core/browser 13.81 kB - -
@sentry/node 155.45 kB +0.13% +194 B 🔺
@sentry/node/import (ESM hook with diagnostics-channel injection) 84.06 kB - -
@sentry/node - without tracing 97.08 kB +0.17% +160 B 🔺
@sentry/node - without channel injection 133.42 kB +0.14% +182 B 🔺
@sentry/aws-serverless 105.28 kB +0.18% +180 B 🔺
@sentry/cloudflare (withSentry) - minified 212.55 kB +0.79% +1.67 kB 🔺
@sentry/cloudflare (withSentry) 526.82 kB +0.7% +3.65 kB 🔺
@sentry/nextjs/cloudflare (withSentry) - minified 232.11 kB +0.7% +1.6 kB 🔺

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@isaacs
isaacs force-pushed the isaacschlueter/js-3975-share-one-request-handler-wrapper-across-denoserve-bunserve branch from 0e901b1 to bf847fb Compare October 21, 2026 00:49
@isaacs
isaacs marked this pull request as ready for review October 21, 2026 00:49
@isaacs
isaacs requested a review from a team as a code owner October 21, 2026 00:49
@isaacs
isaacs requested review from andreiborza and mydea and removed request for a team October 21, 2026 00:49

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Stale Bugbot comment from a previous run.

Comment thread packages/server-utils/src/utils/wrapServerRequestHandler.ts
@isaacs
isaacs force-pushed the isaacschlueter/js-3975-share-one-request-handler-wrapper-across-denoserve-bunserve branch from bf847fb to e2c327d Compare October 21, 2026 01:07
@isaacs
isaacs requested a review from a team as a code owner October 21, 2026 01:13
@isaacs
isaacs requested review from chargome and removed request for a team October 21, 2026 01:13
@isaacs
isaacs force-pushed the isaacschlueter/js-3975-share-one-request-handler-wrapper-across-denoserve-bunserve branch from e2c327d to 904c22c Compare October 21, 2026 01:13
@isaacs
isaacs force-pushed the isaacschlueter/js-3975-share-one-request-handler-wrapper-across-denoserve-bunserve branch 2 times, most recently from 997d5b5 to 415525c Compare October 21, 2026 01:20

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

Fix All in Cursor

❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.

Reviewed by Cursor Bugbot for commit 415525c. Configure here.

Comment thread packages/server-utils/test/utils/monitorStream.test.ts Outdated
isaacs and others added 2 commits October 20, 2026 21:14
Deno.serve, Bun.serve and Cloudflare each wrap a web `Request` handler
with their own copy of the same steps: request data and body, the
`http.server` span, streamed responses, errors and sessions. The copies
drift, so a fix in one runtime does not reach the others.

This adds `wrapServerRequestHandler` to `@sentry/server-utils` and
moves `Deno.serve` onto it. Bun.serve and Cloudflare follow in separate
PRs, so each runtime's changes can be reviewed alone. The wrapper has
only what Deno needs today, and the next PRs extend it. It is exported
from the shared entry, so the Node-free
`@sentry/server-utils/no-diagnostic-channels` entry can use it too.

The rules follow core's `node:http` server code. `OPTIONS` and `HEAD`
requests get no span and no body capture, but still get request data,
a session and error capture. The static asset filter applies only to
`GET`. For streamed responses, the wrapper uses the stream monitor from
the Bun SDK, which reads only when the client pulls and reports errors
from the stream source. It replaces Deno's own copy, which read ahead
of the client and ignored source errors.

The existing Deno tests pass with no change. Visible changes for Deno:

- An error from the source of a streamed response is now captured, and
  the span gets an error status.
- The SDK no longer reads a streamed response ahead of the client.
- Errors in `OPTIONS` and `HEAD` requests now carry the request data.
- `client.address` is no longer set to the path of a Unix socket.

Part of #25577
Part of JS-3975

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
@isaacs
isaacs force-pushed the isaacschlueter/js-3975-share-one-request-handler-wrapper-across-denoserve-bunserve branch from 6bfff61 to c992cee Compare October 21, 2026 04:14
request,
client,
isolationScope,
options: client.getIntegrationByName<Integration & DenoServeIntegrationOptions>('DenoServe'),

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is this right, does this have the full options? Maybe it would be nicer to have a utility like getDenoServeINtegration being exported from that file and keep that together, instead of having to cast this here, which could easily diverge?

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2 participants