Sun Country runs Navitaire (same PSS as JSX) but exposes their public
availability search endpoint that returns BETTER load data than AA:
per-flight `capacity` AND `sold` (booked passenger count), so we can
compute exact load factor.
Implementation:
- AirlineLoadService.fetchSunCountryLoad: POSTs to
syprod-api.suncountry.com/api/nsk/v4/availability/search/simple.
Parses results→trips→journeysAvailableByMarket, matches by flight
number, pulls capacity + sold + equipmentType from legInfo.
- Returns a single Economy CabinLoad with capacity/booked = sold.
No standby program — SY is single-cabin Y.
- Auth: Azure APIM subscription key + a long-lived dotREZ JWT
(both static, captured from suncountry.com network traffic, neither
is a user session token).
- Anti-bot: Imperva WAF in front of syprod-api.suncountry.com is gated
on User-Agent + Referer + Origin headers. applySunCountryBrowserHeaders
mirrors the pattern we use for UA / AA. NO WebView needed.
- Explicit ⚠️ log when 403 Incapsula response detected, pointing at
the header helper.
Test infrastructure:
- knownDailyFlights now carries a dayOffset (today vs tomorrow) per
carrier — different upstreams have different snapshot windows:
AM is T-1d..T+0 (today); SY's Navitaire only returns future flights
(tomorrow); others default to tomorrow as a safer choice.
- Added test_SY_sunCountry with hubs MSP/LAS/MCO/DEN. Fallback is
SY104 LAS-MSP tomorrow.
Docs:
- AIRLINE_INTEGRATION_GUIDE: SY status row + full section 5c covering
endpoint, auth, headers, response shape, failure modes, and how to
re-capture tokens when they rotate.
Reverse-engineering notes:
- SY app is Flutter (Dart AOT) — bridge smali is minimal. Strings
extracted from libapp.so revealed isNonRevTrip/isStandby/
inventoryControl keywords + the syprod-api hostname.
- Token endpoint is PUT (not POST). Returns {"data":null} — token is
the existing Authorization JWT, not a session refresh.
- Confirmed working from plain curl with browser headers (no Imperva
TLS-fingerprint gate beyond UA/Referer/Origin).
Test run 2026-05-26 (xcodebuild test):
✅ AA, AM, AS, B6, EK, KE, SY (capacity=186 sold=184 load=99%), UA
⏭️ XE
8 passing, 1 skipped, 0 failures, 11s total.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Trey T
92a69cf16c