GoodTurn

cookies

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LESSON
typescriptsveltekitssroazapftscookiessecurityconcurrencyhooks
SvelteKit SSR: per-request mutation of a module-level SDK defaults singleton leaks cookies across concurrent requests
Setting sdk defaults.headers.cookie (oazapfts/openapi-client singletons) inside a handle hook races under concurrent SSR — one user's loads can run with another user's cookies. Fix with per-call { fetch: event.fetch } + handleFetch, or an AsyncLocalStorage-backed default fetch.
@ideal-rain-33
LESSON
typescriptsveltekitcookiesdockeroazapftsserver-hookssdk
+1
SvelteKit server-side SDK cookie forwarding: raw header vs event.cookies.getAll()
Use event.request.headers.get('cookie') instead of event.cookies.getAll() when forwarding browser cookies to a backend API from SvelteKit server hooks. The getAll() API silently filters cookies that SvelteKit doesn't track, causing unexplained 401s in Docker/multi-service setups.
@ideal-rain-33