Return barcode results when one provider fails by justadityaraj · Pull Request #1727 · sysadminsmedia/homebox

justadityaraj · 2026-09-10T03:10:14Z

What type of PR is this?

bug

What this PR does / why we need it

Context

Barcode providers were queried serially, and each upstream request could consume the server's full default write timeout. One unavailable provider could therefore prevent results already returned by another provider from reaching the client.

Changes

Start all configured barcode lookups concurrently using the existing provider functions, shared HTTP client, and standard WaitGroup Add/Done coordination.
Keep results in provider order even when requests finish out of order.
Reuse the existing response-deadline helper so an upstream timeout cannot sever the partial JSON response.

User impact

Barcode autofill now returns products from healthy providers when another provider is slow or failing. Provider failures remain logged, and the configured provider set and response format are unchanged.

Which issue(s) this PR fixes

Fixes #1709.

Testing / Verification

Added an HTTP regression with Homebox's real handler and server, a 50 ms write timeout, and controlled transports for all four default providers. It holds every upstream request past the server deadline, then verifies the available UPCItemDB product still returns with status 200. On clean main, only one of four providers starts before the first response is released.
Ran the regression 10 consecutive times and the complete app/api/handlers/v1 package: passed.
go vet ./...: passed.
golangci-lint v2.13.2 run --timeout=6m ./...: 0 issues.
go build ./app/api: passed.
Live-service check used barcode 4060800160683 with the default public HTTPS providers and no BarcodeSpider token. UPCItemDB returned 200, Open Food Facts returned 200, Open Beauty Facts returned 500, and Open Products Facts returned 404; the actual Homebox handler returned status 200 with the Open Food Facts product in 5.97 seconds.
go test ./... -count=1: the changed handler package and all unrelated packages except attachment/temp-path coverage passed. Five existing Windows failures remain in internal/core/services and internal/data/repo, where absolute temp paths are joined beneath the package directory.

coderabbitai · 2026-09-10T03:10:30Z

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backend/app/api/handlers/v1/v1_ctrl_product_search.go

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Summary by CodeRabbit

Bug Fixes
- Barcode product searches now remain available when one provider responds slowly or fails.
- Searches complete more efficiently by checking supported providers concurrently.
- Slow provider responses no longer prevent available product results from being returned.
Tests
- Added coverage verifying that available product results are returned despite delayed provider responses.
- Added validation that successful results remain accessible when other provider requests are delayed.

Walkthrough

The barcode search handler now performs provider lookups concurrently, allows slow responses, preserves available provider results, and logs individual lookup errors. A new test validates delayed provider responses and successful partial results.

Changes

Barcode search resilience

Layer / File(s)	Summary
Concurrent provider lookup `backend/app/api/handlers/v1/v1_ctrl_product_search.go`	The handler runs configured barcode providers concurrently with a `sync.WaitGroup`. It preserves per-provider errors and combines successful results into the response.
Delayed provider response validation `backend/app/api/handlers/v1/v1_ctrl_product_search_test.go`	The test blocks mocked provider requests beyond the server write timeout and verifies a `200` response containing the available product.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Severity of issue fixed: Medium

Merge Risk: ⚪ Minimal · up to 7a6fb

Barcode searches now run providers concurrently and return available product data when other providers are delayed or fail. The delayed-response coverage confirms successful partial results, with no concrete current-head merge risk identified.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 2 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly describes the primary change: returning barcode results when a provider fails.
Description check	✅ Passed	The description identifies the bug, explains the implementation and user impact, links issue `#1709`, and documents testing. The optional reviewer-notes section is not required.
Linked Issues check	✅ Passed	The PR satisfies issue `#1709` by running provider lookups concurrently, preserving successful results, preventing response deadlines from interrupting partial responses, and retaining provider failure …
Out of Scope Changes check	✅ Passed	The handler changes and regression test directly support the linked issue and PR objectives. No unrelated code changes are present.

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_{Barcode calls now race the clock,
Slow providers no longer block.
One result returns bright and clear,
While errors stay logged near.
The handler gathers what can arrive,
And keeps the response alive.}

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Actionable comments posted: 1

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Inline comments:
In `@backend/app/api/handlers/v1/v1_ctrl_product_search.go`:
- Line 518: Update the GitLab CI test and binary build job images from
golang:1.24 to golang:1.26 so they match the Go version required by
backend/go.mod and support sync.WaitGroup.Go without relying on toolchain
downloads.

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backend/app/api/handlers/v1/v1_ctrl_product_search.go
backend/app/api/handlers/v1/v1_ctrl_product_search_test.go

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Return available barcode results after provider failures

79df8eb

coderabbitai Bot requested a review from tankerkiller125 September 10, 2026 03:10

coderabbitai Bot requested changes Sep 10, 2026

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Comment thread backend/app/api/handlers/v1/v1_ctrl_product_search.go Resolved

fix: avoid WaitGroup.Go in barcode lookup

7a6fbf0

coderabbitai Bot approved these changes Sep 10, 2026

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tankerkiller125 approved these changes Sep 11, 2026

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tankerkiller125 merged commit 9392326 into sysadminsmedia:main Sep 11, 2026
21 of 22 checks passed

github-actions Bot mentioned this pull request Nov 2, 2026

Update sysadminsmedia/homebox Docker tag to v0.27.0 claytono/infra#3361

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Return barcode results when one provider fails - #1727

Return barcode results when one provider fails#1727
tankerkiller125 merged 2 commits into
sysadminsmedia:mainfrom
justadityaraj:fix/1709-barcode-provider-fallback

justadityaraj commented Sep 10, 2026 •

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coderabbitai Bot commented Sep 10, 2026 •

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justadityaraj commented Sep 10, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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coderabbitai Bot commented Sep 10, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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justadityaraj commented Sep 10, 2026 •

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