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actuallyjamez/svelte-cookies.ts

Created March 22, 2025 15:37
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Better Auth plugin to set cookies on server api requests
Raw
svelte-cookies.ts
import type { BetterAuthPlugin } from "better-auth";
import { createAuthMiddleware } from "better-auth/api";
import { parseSetCookieHeader } from "better-auth/cookies";
export const svelteCookies = () => {
return {
id: "svelte-cookies",
hooks: {
after: [
{
matcher(ctx) {
return true;
},
handler: createAuthMiddleware(async (ctx) => {
const returned = ctx.context.responseHeaders;
if (returned instanceof Headers) {
const setCookies = returned?.get("set-cookie");
if (!setCookies) return;
const { getRequestEvent } = await import("$app/server")
const event = getRequestEvent();
const parsed = parseSetCookieHeader(setCookies);
for (const [name, { value, ...ops }] of parsed) {
event.cookies.set(name, value, {
sameSite: ops.samesite,
path: ops.path || "/",
expires: ops.expires,
secure: ops.secure,
httpOnly: ops.httponly,
domain: ops.domain,
maxAge: ops["max-age"],
encode: (value) => value,
});
}
}
}),
},
],
},
} satisfies BetterAuthPlugin;
};
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