79 lines
2.1 KiB
TypeScript
79 lines
2.1 KiB
TypeScript
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import {
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captureWaitlistSignup,
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normalizeWaitlistEmail,
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parseWaitlistBody,
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} from "../src/waitlist.js";
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const MAX_BODY_BYTES = 2_048;
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function json(status: number, body: unknown) {
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return Response.json(body, {
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status,
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headers: { Allow: "POST", "Cache-Control": "no-store" },
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});
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}
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async function readBody(request: Request): Promise<string | null> {
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if (!request.body) return "";
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const reader = request.body.getReader();
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const decoder = new TextDecoder();
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let bytes = 0;
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let body = "";
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try {
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while (true) {
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const { done, value } = await reader.read();
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if (done) break;
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bytes += value.byteLength;
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if (bytes > MAX_BODY_BYTES) {
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await reader.cancel();
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return null;
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}
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body += decoder.decode(value, { stream: true });
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}
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return body + decoder.decode();
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} finally {
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reader.releaseLock();
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}
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}
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async function fetchWaitlist(request: Request) {
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if (request.method !== "POST") {
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return json(405, { error: "Method not allowed" });
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}
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const contentLengthHeader = request.headers.get("content-length");
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if (contentLengthHeader !== null) {
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const contentLength = Number(contentLengthHeader);
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if (!Number.isFinite(contentLength) || contentLength < 0 || contentLength > MAX_BODY_BYTES) {
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return json(400, { error: "Invalid request" });
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}
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}
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const rawBody = await readBody(request).catch(() => null);
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const body = rawBody === null ? null : parseWaitlistBody(rawBody);
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if (!body) {
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return json(400, { error: "Enter a valid email address" });
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}
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// A hidden field catches basic form spam without confirming the trap to bots.
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if (body.contactNote?.trim()) {
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return json(200, { ok: true });
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}
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const email = normalizeWaitlistEmail(body.email);
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if (!email) {
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return json(400, { error: "Enter a valid email address" });
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}
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const captured = await captureWaitlistSignup(email, process.env).catch(() => false);
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if (!captured) {
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return json(503, { error: "Waitlist is temporarily unavailable" });
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}
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return json(200, { ok: true });
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}
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export default { fetch: fetchWaitlist };
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