32 lines
1.9 KiB
TypeScript
32 lines
1.9 KiB
TypeScript
// STOREBOUND_STORE_MOCK=http://127.0.0.1:<port>: every request to a store host (App Store Connect, Google APIs, the
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// public store pages, the example.com placeholders) goes to that local double instead, as
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// <mock>/__host/<host>/<path>. The release acceptance matrix (tools/acceptance.ts) runs the packed npm tarball this
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// way against the fake stores of tests/helpers/fake-stores.ts, on every platform and runtime. Only a loopback address
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// (with an optional path: the matrix gives every cell its own store) is accepted, so the variable can never send store keys or tokens to another machine. Unset: nothing changes.
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const STORE_HOST = /^(?:[a-z0-9-]+\.)*(?:apple\.com|googleapis\.com|google\.com|example\.com)$/i;
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const LOOPBACK = /^http:\/\/(?:127\.0\.0\.1|localhost|\[::1\]):\d{1,5}(?:\/[\w.-]+)*$/;
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/** The URL a request goes to under the mock (unchanged for hosts that are not store hosts). */
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export function mockedUrl(url: string, base: string): string {
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let u: URL;
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try { u = new URL(url); } catch { return url; }
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if (u.protocol !== 'https:' || !STORE_HOST.test(u.hostname)) return url;
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return `${base}/__host/${u.hostname}${u.pathname}${u.search}`;
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}
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/** Installs the redirect when STOREBOUND_STORE_MOCK is set; throws on a non-loopback value. */
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export function installStoreMock(env: Record<string, string | undefined> = process.env): boolean {
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const base = env.STOREBOUND_STORE_MOCK?.replace(/\/+$/, '');
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if (!base) return false;
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if (!LOOPBACK.test(base)) throw new Error(`STOREBOUND_STORE_MOCK must be a loopback address like http://127.0.0.1:8080 (got ${JSON.stringify(base)})`);
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const real = globalThis.fetch;
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globalThis.fetch = ((input: string | URL | Request, init?: RequestInit) => {
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if (input instanceof Request) {
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const to = mockedUrl(input.url, base);
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return real(to === input.url ? input : new Request(to, input), init);
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}
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return real(mockedUrl(String(input), base), init);
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}) as typeof fetch;
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return true;
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}
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