Update Lockr integration to use dedicated trust-server SDK

[ChristianPavilonis]

Summary

• Switch to Lockr's dedicated trust-server SDK (identity-lockr-trust-server.js) which is pre-configured to route API calls through the first-party proxy, eliminating our fragile runtime regex host rewriting
• Remove rewrite_sdk_host config and regex logic — the new SDK handles this natively, so handle_sdk_serving() now serves the SDK as-is with no conditional rewriting
• Add debug logging with [lockr] prefix for diagnosing production attribute rewriting issues

Changes

File	Change
crates/common/src/integrations/lockr.rs	Updated default sdk_url to identity-lockr-trust-server.js; removed rewrite_sdk_host config field, rewrite_sdk_host() regex method, default_rewrite_sdk_host() fn, and regex import; simplified handle_sdk_serving() to serve SDK without host rewriting or X-Lockr-Host-Rewritten header; fixed operator precedence in is_lockr_sdk_url() with explicit parentheses; added tracing::debug! logging to register() and rewrite(); removed 4 host-rewriting tests, extracted test_config()/test_context() helpers, added test_attribute_rewriter_keeps_non_lockr_urls and trust-server SDK URL detection test
trusted-server.toml	Updated example sdk_url to match new default (identity-lockr-trust-server.js)

Closes

Closes #394
Closes #150

Test plan

• cargo test --workspace
• cargo clippy --all-targets --all-features -- -D warnings
• cargo fmt --all -- --check
• JS tests: cd crates/js/lib && npx vitest run
• JS format: cd crates/js/lib && npm run format
• Docs format: cd docs && npm run format
• WASM build: cargo build --bin trusted-server-fastly --release --target wasm32-wasip1
• Manual testing via fastly compute serve
• Other: N/A

Checklist

• Changes follow CLAUDE.md conventions
• No unwrap() in production code — use expect("should ...")
• Uses tracing macros (not println!)
• New code has tests
• No secrets or credentials committed

Backward compatibility

LockrConfig does not have #[serde(deny_unknown_fields)], so existing configs with rewrite_sdk_host will be silently ignored during deserialization. No breakage.

[prk-Jr]

👍 Looks good to me.

[aram356]

Summary

Good simplification — replaces fragile regex-based SDK host rewriting with a dedicated trust-server SDK from Lockr. Removes the regex dependency from this module, cleans up tests, and reduces code by ~190 lines. Two issues need attention before merge: the aim.loc.kr URL matching is overly broad, and removing rewrite_sdk_host without a deprecation warning risks silent privacy regressions for existing deployments.

Blocking

🔧 wrench

• Overly broad aim.loc.kr URL matching: any URL on that domain matches, including non-JS resources (lockr.rs:94)
• Silent config drop for rewrite_sdk_host: existing deployments lose host rewriting without warning (lockr.rs:31)

Non-blocking

🤔 thinking

• Contract coverage regressed: no test asserts the new SDK-served-as-is contract (lockr.rs:361)

🏕 camp site

• Verbose debug logging: log::debug! fires for every attribute on every page (lockr.rs:322)

📝 note

• Redundant guard is consistent: defensive rewrite_sdk check matches other integrations (lockr.rs:316)

📌 out of scope

• API endpoint domain mismatch (pre-existing): code default identity.lockr.kr vs TOML identity.loc.kr — worth a follow-up

🌱 seedling

• SDK mode header: consider X-Lockr-SDK-Mode for migration observability (lockr.rs:153)

👍 praise

• Test helpers and assertions: test_config(), test_context(), descriptive messages (lockr.rs:365)

CI Status

• fmt: PASS
• clippy: PASS
• rust tests: PASS
• js tests: PASS

[ChristianPavilonis]

Addressed all review feedback in 6f4077a:

Blocking — fixed:

• Overly broad aim.loc.kr URL matching — is_lockr_sdk_url() now requires both domains to match identity-lockr and end with .js. Added negative test cases for pixel.gif and styles.css.
• Silent config drop for rewrite_sdk_host — Re-added as Option<bool> with #[serde(default)] so existing configs deserialize cleanly. register() emits log::warn! when the field is present.

Non-blocking — addressed:

• Contract coverage — Added test_default_sdk_url_uses_trust_server asserting the default SDK URL contains trust-server.
• Verbose debug logging — Removed the per-attribute log::debug! that fired on every src/href; now only logs when actually rewriting a Lockr URL.
• API endpoint domain mismatch — Fixed default_api_endpoint() from identity.lockr.kr to identity.loc.kr to match trusted-server.toml.
• SDK mode header — Added X-Lockr-SDK-Mode: trust-server to SDK responses for migration observability.

[aram356]

Removed in place one below

[aram356]

Summary

Clean simplification — switches from fragile runtime regex rewriting of obfuscated SDK JavaScript to a dedicated trust-server SDK that handles host routing natively. Net -165 lines. Backwards-compatible deprecation of rewrite_sdk_host is well handled.

Findings

🤔 Medium (P2)

• Operator precedence was a real bug: commit message says "no behavioral change" but the old code matched any aim.loc.kr URL regardless of path (lockr.rs:101) — see inline
• Dead code guard in rewrite(): handles_attribute() already gates on rewrite_sdk, so the guard and debug log inside rewrite() never fire (lockr.rs:328) — see inline
• Inconsistent log prefix: [lockr] prefix on debug lines doesn't match rest of file (lockr.rs:337) — see inline
• Missing negative test: no Rust test for non-SDK .js on identity.loc.kr (lockr.rs:398) — see inline

⛏ Low (P3)

• Hardcoded domain in doc comment: should say "configured Lockr API endpoint" (lockr.rs:161) — see inline
• Silent default change: default_api_endpoint changed from identity.lockr.kr to identity.loc.kr (lockr.rs:350) — see inline

👍 Highlights

• Backwards-compatible deprecation of rewrite_sdk_host via Option<bool> + runtime warning
• Operator precedence bug fix in is_lockr_sdk_url
• Test helpers test_config() / test_context() reduce boilerplate cleanly

CI Status

• fmt: PASS
• clippy: PASS (via Analyze)
• rust tests: PASS
• js tests: PASS
• docs format: PASS
• CodeQL: PASS

[ChristianPavilonis]

Addressed remaining review feedback (df8ca54)

Thanks for the thorough second pass Aram — all four items are addressed:

Finding	Resolution
Dead code guard in rewrite() (P2)	Removed the unreachable log::debug! line. Kept the guard itself for defensive consistency with other integrations (permutive, gpt, testlight).
Inconsistent [lockr] log prefix (P2)	Dropped the [lockr] prefix — now reads "Rewriting Lockr SDK URL to {}" to match the rest of the file.
Missing negative test for non-SDK .js (P2)	Added !is_lockr_sdk_url("https://identity.loc.kr/some-other-script.js") assertion.
Hardcoded domain in doc comment (P3)	Changed to "forward requests to the configured Lockr API endpoint."

Re: the default_api_endpoint change from identity.lockr.kr — as noted, it was never lockr.kr; the old default was an AI hallucination that never matched the TOML config. The correct domain has always been identity.loc.kr.