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fix(demo): POST waitlist to canonical www host to avoid preflight redirect

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The demo (demo.pcbjam.com) cross-posts the waitlist to the marketing site's
serverless endpoint. It targeted the apex pcbjam.com, which 308-redirects to
www on Vercel; a CORS preflight can't follow redirects, so the OPTIONS failed
("Redirect is not allowed for a preflight request") and the POST never landed.

Point the waitlist target at the canonical www host. www.pcbjam.com already
returns 204 with access-control-allow-origin: https://demo.pcbjam.com, so the
preflight passes. Landing/version-badge link stays on the apex.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01REwWZGkAz1AZUJw8yqxkCN
This commit is contained in:
Viktor Vaczi 2026-07-04 11:39:38 +02:00
commit 34d2602132
3 changed files with 15 additions and 4 deletions
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9
scripts/deploy/build-demo.mjs
View file

@ -58,7 +58,14 @@ function parseArgs(argv) {
a.cdn = a.cdn.replace(/\/+$/, ""); a.cdn = a.cdn.replace(/\/+$/, "");
a.repo = a.repo.replace(/\/+$/, ""); a.repo = a.repo.replace(/\/+$/, "");
a.landing = a.landing.replace(/\/+$/, ""); a.landing = a.landing.replace(/\/+$/, "");
a.waitlist = a.waitlist || `${a.landing}/api/waitlist`; // The cross-origin demo POSTs the waitlist to the marketing site's serverless
// endpoint. The apex (pcbjam.com) 308-redirects to www on Vercel, and a CORS
// preflight can't follow redirects, so the demo must hit the canonical www host
// directly. Derive from --landing for custom/staging hosts, but pin the
// production apex to www. (Landing/version-badge link stays on the apex.)
const waitlistHost =
a.landing === "https://pcbjam.com" ? "https://www.pcbjam.com" : a.landing;
a.waitlist = a.waitlist || `${waitlistHost}/api/waitlist`;
return a; return a;
} }

6
web/standalone/.env.example
View file

@ -34,11 +34,13 @@ VITE_WASM_ROOT=/wasm
# Marketing / landing page the version badge links to (default https://pcbjam.com). # Marketing / landing page the version badge links to (default https://pcbjam.com).
# VITE_LANDING_URL=https://pcbjam.com # VITE_LANDING_URL=https://pcbjam.com
# Where the in-editor waitlist form POSTs (default https://pcbjam.com/api/waitlist). # Where the in-editor waitlist form POSTs (default https://www.pcbjam.com/api/waitlist).
# The demo is static with no backend, so it cross-posts to the landing site's # The demo is static with no backend, so it cross-posts to the landing site's
# serverless endpoint, which must send CORS for this origin (see # serverless endpoint, which must send CORS for this origin (see
# site/src/pages/api/waitlist.ts). Same JSON contract {email, source, company_url}. # site/src/pages/api/waitlist.ts). Same JSON contract {email, source, company_url}.
# VITE_WAITLIST_URL=https://pcbjam.com/api/waitlist # Use the canonical www host: the apex 308-redirects to www and a CORS preflight
# can't follow redirects.
# VITE_WAITLIST_URL=https://www.pcbjam.com/api/waitlist
# Plausible analytics. Unset ⇒ no tracking (dev/checkout default). Set the # Plausible analytics. Unset ⇒ no tracking (dev/checkout default). Set the
# data-domain to enable; override the script URL only if the default plausible.io # data-domain to enable; override the script URL only if the default plausible.io

4
web/standalone/src/lib/config.ts
View file

@ -54,9 +54,11 @@ export const LANDING_URL = (
* Where the in-editor waitlist form POSTs. The demo is a fully static deploy with * Where the in-editor waitlist form POSTs. The demo is a fully static deploy with
* no backend, so it cross-posts to the landing site's serverless endpoint (which * no backend, so it cross-posts to the landing site's serverless endpoint (which
* sends CORS for this origin). Same JSON contract as site/src/pages/api/waitlist.ts. * sends CORS for this origin). Same JSON contract as site/src/pages/api/waitlist.ts.
* Targets the canonical www host: the apex 308-redirects to www on Vercel, and a
* CORS preflight can't follow a redirect (so the apex would break the POST).
*/ */
export const WAITLIST_URL = export const WAITLIST_URL =
import.meta.env.VITE_WAITLIST_URL || "https://pcbjam.com/api/waitlist"; import.meta.env.VITE_WAITLIST_URL || "https://www.pcbjam.com/api/waitlist";
/** /**
* Plausible analytics (privacy-friendly, cookieless). Off unless a domain is set * Plausible analytics (privacy-friendly, cookieless). Off unless a domain is set