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chore: add CSRF middleware for server functions #9

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Merged
seokju-na merged 2 commits into from
Jul 1, 2026
Merged

chore: add CSRF middleware for server functions #9

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c45aba3
chore: add CSRF middleware for server functions
seokju-na Jul 1, 2026
3a6add6
chore: run Sentry request middleware before CSRF
seokju-na Jul 1, 2026
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12 changes: 10 additions & 2 deletions src/start.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -2,11 +2,19 @@ import {
sentryGlobalFunctionMiddleware,
sentryGlobalRequestMiddleware,
} from '@sentry/tanstackstart-react';
import { createStart } from '@tanstack/react-start';
import { createCsrfMiddleware, createStart } from '@tanstack/react-start';

// Server functions are same-origin RPC endpoints; reject cross-site requests to
// them (same-origin check via Sec-Fetch-Site / Origin, with a Referer fallback).
const csrfMiddleware = createCsrfMiddleware({
filter: ctx => ctx.handlerType === 'serverFn',
});

export const startInstance = createStart(() => {
return {
requestMiddleware: [sentryGlobalRequestMiddleware],
// Sentry first (outermost) so it observes the whole request, including any
// CSRF rejection raised by the middleware after it.
requestMiddleware: [sentryGlobalRequestMiddleware, csrfMiddleware],
functionMiddleware: [sentryGlobalFunctionMiddleware],
};
});