Add JavaScript source map symbolication by ejsmith · Pull Request #2373 · exceptionless/Exceptionless

ejsmith · 2026-07-14T22:30:58Z

Summary

Symbolicate JavaScript error frames with version 3 source maps before stack signatures are calculated.
Automatically discover public source maps from SourceMap/X-SourceMap headers, sourceMappingURL, or the conventional .map URL.
Add project-scoped upload/list/delete APIs and a Svelte Project Settings page for private or unpublished maps.
Add least-privilege, project-scoped source-maps:write tokens for CI/CD uploads, including creation from the API Keys UI, visible scope labels, deployment documentation, and HTTP contract samples.
Persist maps in configured file storage, remove them with deleted projects or organizations, and document current limitations.

Security and reliability

Automatic downloads are anonymous HTTPS-only requests to public network addresses; redirects are revalidated and cookies/proxies are disabled.
Download time, redirects, sizes, concurrency, per-project rate, mapping count, frame count, and total event processing time are bounded and configurable.
Parsed maps use a size-bounded, expiring memory cache; in-flight loads are deduplicated without being abandoned when one event times out.
Automatically discovered maps are revalidated after a configurable interval, and a failed refresh leaves generated frames unchanged instead of applying stale mappings.
Content-versioned storage and distributed artifact locks keep replacements consistent and ensure explicit uploads win races with automatic discovery.
Upload-only tokens are accepted only for their assigned project and cannot list/delete maps or use ordinary user APIs; normal client keys cannot upload maps.
Generated locations are retained in frame metadata, and symbolication failures or malformed maps never prevent event ingestion.

Validation

Backend build: 0 warnings, 0 errors
Source map parser/service tests: 20 passed
Source map API tests: 10 passed
Token/auth authorization tests: 81 passed
Organization source-map cleanup regression: passed
Controller manifest and OpenAPI integration tests: 4 passed
Frontend unit tests: 294 passed
npm run validate: 0 errors, 0 warnings
npm run build
deno task build

Adversarial review

The follow-up reviews found and fixed unbounded parsed-map retention, indefinitely stale auto-downloaded maps, non-atomic replacement storage, upload/download races, canceled-caller in-flight eviction, unsafe configuration limits, hidden UI query/delete failures, missing organization-level source-map cleanup, malformed-map 500 responses, and unbounded empty mapping-line allocations. Regression coverage and HTTP contract samples were added for these paths.

Breaking changes

None.

Follow-ups

Indexed source maps and authenticated automatic downloads are intentionally left for future work; private flat maps can be uploaded now.

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ejsmith · 2026-07-15T01:14:04Z

/preview

github-actions · 2026-07-15T01:14:13Z

Preview deployed

App: https://dev-app.exceptionless.io
Collector: https://dev-collector.exceptionless.io
Commit: 945a328f906d
Version: 8.6.3-preview.feature.source-map-symbolication.0.26
Workflow run: view logs

ejsmith · 2026-07-15T02:39:25Z

/preview

ejsmith · 2026-07-15T03:20:47Z

/preview

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…mbolication # Conflicts: # src/Exceptionless.Web/Api/Handlers/SourceMapController.cs # src/Exceptionless.Web/Controllers/EventController.cs # src/Exceptionless.Web/Controllers/TokenController.cs # src/Exceptionless.Web/Startup.cs # tests/Exceptionless.Tests/Api/Data/openapi.json # tests/Exceptionless.Tests/Api/Endpoints/SourceMapControllerTests.cs # tests/Exceptionless.Tests/Controllers/Data/controller-manifest.json # tests/Exceptionless.Tests/Controllers/OpenApiControllerTests.cs

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github-actions · 2026-07-16T04:25:49Z

Package	Line Rate	Branch Rate	Complexity	Health
Exceptionless.Insulation	23%	23%	205	❌
Exceptionless.Core	72%	65%	9271	➖
Exceptionless.AppHost	38%	39%	144	❌
Exceptionless.Web	84%	67%	6888	✔
Summary	76% (22135 / 29042)	65% (10122 / 15600)	16508	✔

niemyjski

Addressed source-map review feedback; pushed fixes and replacement CI are green.

Add JavaScript source map symbolication

6550a8d

ejsmith force-pushed the feature/source-map-symbolication branch from 6fb5096 to 6550a8d Compare July 14, 2026 22:42

Harden source map symbolication lifecycle

5e7dd25

ejsmith marked this pull request as ready for review July 14, 2026 23:24

chatgpt-codex-connector Bot reviewed Jul 14, 2026

View reviewed changes

Comment thread src/Exceptionless.Web/Controllers/SourceMapController.cs Outdated

Comment thread src/Exceptionless.Core/Jobs/CleanupDataJob.cs

Comment thread src/Exceptionless.Core/Services/SourceMaps/SourceMapDocument.cs Outdated

Add project-scoped source map upload tokens

3a42b1f

chatgpt-codex-connector Bot reviewed Jul 15, 2026

View reviewed changes

Comment thread src/Exceptionless.Core/Services/SourceMaps/SourceMapDocument.cs Outdated

Comment thread src/Exceptionless.Core/Services/SourceMaps/SourceMapDocument.cs

ejsmith added 2 commits July 14, 2026 19:06

Add source map token creation to the UI

5bc2414

Harden source map parser limits

609846c

chatgpt-codex-connector Bot reviewed Jul 15, 2026

View reviewed changes

Comment thread src/Exceptionless.Core/Jobs/CleanupDataJob.cs Outdated

Clean up source maps for deleted projects

8bed4e0

github-actions Bot added the dev-preview Deploy this pull request to the shared dev environment. label Jul 15, 2026

Throttle automatic source map discovery

911eb5d

Fix source map upload page render

a687fb5

chatgpt-codex-connector Bot reviewed Jul 15, 2026

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Comment thread src/Exceptionless.Core/Services/SourceMaps/SourceMapDownloader.cs Outdated

ejsmith and others added 3 commits July 15, 2026 10:23

Merge origin/main into feature/source-map-symbolication

618e4ce

Harden source map processing

758ddaf

chatgpt-codex-connector Bot reviewed Jul 16, 2026

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Comment thread src/Exceptionless.Core/Services/SourceMaps/SourceMapDownloader.cs Outdated

niemyjski added 2 commits July 15, 2026 22:12

Fix OpenAPI snapshot terminator

1064caf

Honor source map response headers before size checks

e1e4ab2

chatgpt-codex-connector Bot reviewed Jul 16, 2026

View reviewed changes

Comment thread src/Exceptionless.Core/Services/SourceMaps/SourceMapService.cs Outdated

Comment thread src/Exceptionless.Web/Api/Endpoints/SourceMapEndpoints.cs Outdated

Validate source map symbolication inputs

7cb15bf

chatgpt-codex-connector Bot reviewed Jul 16, 2026

View reviewed changes

Comment thread src/Exceptionless.Core/Services/SourceMaps/SourceMapDocument.cs

niemyjski added 2 commits July 15, 2026 22:52

Stabilize source map content validation tests

9645042

Bound source map segments before allocation

3a381b2

chatgpt-codex-connector Bot reviewed Jul 16, 2026

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Comment thread src/Exceptionless.Core/Services/SourceMaps/SourceMapDownloader.cs Outdated

Stabilize source map validation and fallback

945a328

niemyjski reviewed Jul 16, 2026

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