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import { env } from "cloudflare:workers";
import * as Sentry from "@sentry/cloudflare";
import type { APIContext, MiddlewareNext } from "astro";
import { setEnvRobotTag } from "./lib/cache-headers";
import { buildCacheKeyUrl } from "./lib/cache-key";
import { DEFAULT_LOCAL_API_URL } from "./lib/constants";
import { CSP_ALLOWLIST } from "./lib/csp-allowlist";
import { isSyntheticAuditor } from "./lib/gtm-load";
// Trace sampling per environment — mirrors the API worker so prod stays cheap
// while dev/preview capture everything. Errors are always captured regardless.
function sentryTracesSampleRate(environment: string): number {
switch (environment) {
case "production":
return 0.1;
case "preview":
return 0.5;
default:
return 1.0;
}
}
// Deploy-version marker for the edge cache key, so HTML cached by a prior
// deploy is never served by the next one. It is the Worker version ID from the
// `version_metadata` binding (wrangler.jsonc, declared per env: bindings are not
// inherited), which every `wrangler deploy` changes, from CI or by hand.
//
// It used to be `Date.now().toString(36)` at module scope. A deployed Worker's
// clock does not run during module evaluation (global scope, which this lazily
// imported module's top level still counts as), so the marker came out the same
// on every deploy and dev kept serving HTML stored before five redeploys
// (#1125). "local" covers dev servers and tests that run without the binding.
function deployVersion(): string {
return env.CF_VERSION_METADATA?.id || "local";
}
// Pre-joined CSP allowlist tokens. CSP_ALLOWLIST is static config, so the
// space-separated form is computed once at module load instead of on every
// request inside `onRequest`.
const CSP_SCRIPT_SRC = CSP_ALLOWLIST.scriptSrc.join(" ");
const CSP_IMG_SRC = CSP_ALLOWLIST.imgSrc.join(" ");
const CSP_CONNECT_SRC = CSP_ALLOWLIST.connectSrc.join(" ");
const CSP_FRAME_SRC = CSP_ALLOWLIST.frameSrc.join(" ");
const CSP_FORM_ACTION = CSP_ALLOWLIST.formAction.join(" ");
// Determine if this request should use the Cloudflare edge cache.
// Only GET requests for HTML pages — not API routes, not static assets.
function isCacheableRequest(method: string, pathname: string): boolean {
if (method !== "GET") return false;
if (pathname.startsWith("/api/")) return false;
if (pathname.startsWith("/_astro/")) return false;
if (
/\.(js|css|woff2?|ttf|otf|eot|svg|png|jpg|jpeg|gif|webp|ico|xml|txt|json)$/.test(
pathname,
)
)
return false;
return true;
}
// Extract a numeric directive (e.g. `s-maxage=600`) from a Cache-Control value.
// Anchored on a directive boundary (start, comma, or whitespace) so a short
// name can't match inside a longer one (e.g. "age" inside "s-maxage").
function cacheControlSeconds(
cacheControl: string,
directive: "s-maxage" | "stale-while-revalidate" | "max-age",
): number | undefined {
const m = cacheControl.match(new RegExp(`(?:^|[,\\s])${directive}=(\\d+)`));
return m ? Number.parseInt(m[1], 10) : undefined;
}
// Non-production X-Robots-Tag. Layout frontmatter can set Astro.response
// headers, but those headers do not survive onto the Response middleware
// returns, so the tag has to be applied here — including on an edge-cache
// HIT, whose stored headers were frozen by whoever filled the cache.
// Lighthouse / HeadlessChrome still bypass, matching setEnvRobotTag.
function applyEnvRobotTag(headers: Headers, request: Request, url: URL): void {
setEnvRobotTag(
{ response: { headers } },
env.ENVIRONMENT,
request.headers.get("user-agent"),
request.headers.get("x-lighthouse-audit"),
url.searchParams.has("_lh"),
);
}
const handleRequest = async (context: APIContext, next: MiddlewareNext) => {
const url = new URL(context.request.url);
// Purge legacy template-leak URLs. A prior bug let the SearchAction target
// template `{search_term_string}` reach live URLs (e.g.
// `/pros?search={search_term_string}`), which Googlebot crawled and indexed.
// These are never valid. Return 410 Gone (not 404) so Google drops them fast.
// Matches both the raw token and its percent-encoded form (`%7B…%7D`); we key
// off the token, not bare braces, so a genuine `?q={foo}` search still works.
Iif (/%7bsearch_term_string%7d|\{search_term_string\}/i.test(url.search)) {
return new Response("Gone", {
status: 410,
headers: { "Cache-Control": "no-store" },
});
}
// Local dev: proxy /cdn-cgi/image/* requests to the actual image URL.
// Cloudflare Image Resizing only works on their edge, not in wrangler dev.
// Format: /cdn-cgi/image/params.../https://host/api/images/path
// or: /cdn-cgi/image/params.../path (relative)
//
// Target URL MUST be validated against env.IMAGE_URL + env.API_URL — the
// path is attacker-controlled (from page src), so without allowlisting a
// request to /cdn-cgi/image/w=1/http://169.254.169.254/ would exfiltrate
// cloud metadata, and /cdn-cgi/image/w=1/http://localhost:7001/api/admin/
// would proxy internal endpoints. In production CF handles /cdn-cgi/*
// before the Worker so this code is dev-only, but a misconfigured
// wrangler route would make it exploitable in prod.
if (url.pathname.startsWith("/cdn-cgi/image/")) {
const rest = url.pathname.slice("/cdn-cgi/image/".length);
// Strip the resize params (everything before the first "/" after params)
// Params look like: onerror=redirect,width=800,height=500,format=webp/...
const slashAfterParams = rest.indexOf("/");
if (slashAfterParams !== -1) {
const imageTarget = rest.slice(slashAfterParams + 1);
const allowedImageOrigin = env.IMAGE_URL || "";
const allowedApiUrl = env.API_URL || DEFAULT_LOCAL_API_URL;
// If it starts with http, it's an absolute URL — fetch only if it
// matches the configured image host or API host.
if (imageTarget.startsWith("http")) {
let targetOrigin: string;
try {
targetOrigin = new URL(imageTarget).origin;
} catch {
return new Response(null, { status: 400 });
}
const allowedOrigins = [
allowedImageOrigin && new URL(allowedImageOrigin).origin,
new URL(allowedApiUrl).origin,
].filter(Boolean) as string[];
if (!allowedOrigins.includes(targetOrigin)) {
return new Response(null, { status: 403 });
}
try {
const imgRes = await fetch(imageTarget);
return new Response(imgRes.body, {
status: imgRes.status,
headers: {
"Content-Type":
imgRes.headers.get("Content-Type") || "image/jpeg",
"Cache-Control": "public, max-age=3600",
},
});
} catch {
return new Response(null, { status: 404 });
}
}
// Relative path — proxy through the local API
const imgPath = imageTarget.startsWith("/api/images/")
? imageTarget
: `/api/images/${imageTarget}`;
try {
const imgRes = await fetch(`${allowedApiUrl}${imgPath}`);
return new Response(imgRes.body, {
status: imgRes.status,
headers: {
"Content-Type": imgRes.headers.get("Content-Type") || "image/jpeg",
"Cache-Control": "public, max-age=3600",
},
});
} catch {
return new Response(null, { status: 404 });
}
}
}
// --- SSR session probe ---
// The marketplace is SSR on every navigation (not SPA). Without this, every
// hydration island has to fetch /api/homeowner/auth/get-session after hydrate
// before it can render the logged-in state, causing a visible "logged-out
// flash" for 0.8-1.7s. We forward the session cookie server-side so the
// Astro layout can pass `initialUser` to islands and they render correctly
// on first paint.
const cookieHeader = context.request.headers.get("cookie") || "";
const hasSessionCookie = /ho\.session_token=/.test(cookieHeader);
const apiUrlForSession = env.API_URL || DEFAULT_LOCAL_API_URL;
if (hasSessionCookie) {
try {
const sessionRes = await fetch(
`${apiUrlForSession}/api/homeowner/auth/get-session`,
{ headers: { cookie: cookieHeader } },
);
if (sessionRes.ok) {
const data = (await sessionRes.json()) as {
user?: HomeownerLocalUser & { emailVerified?: boolean };
} | null;
if (data?.user) {
context.locals.homeownerUser = {
id: data.user.id,
name: data.user.name,
email: data.user.email,
image: data.user.image ?? null,
emailVerified: data.user.emailVerified ?? false,
phoneNumber: data.user.phoneNumber ?? null,
};
} else {
context.locals.homeownerUser = null;
}
}
} catch {
// Non-fatal: fall back to client-side probe.
}
} else {
context.locals.homeownerUser = null;
}
const cacheable = isCacheableRequest(context.request.method, url.pathname);
// --- Edge Cache: check for cached HTML response ---
// Cloudflare Workers don't use the CDN cache layer automatically.
// We explicitly use the Cache API to cache SSR responses at the edge PoP.
// Skip entirely when a session cookie is present — otherwise one user's
// personalized HTML (e.g. UserMenu with their name) could be served to
// another user or to anonymous traffic.
const hasCache = typeof caches !== "undefined";
const edgeCacheable = cacheable && !hasSessionCookie;
let cache: Cache | undefined;
let cacheKey: Request | undefined;
if (edgeCacheable && hasCache) {
cache = (caches as unknown as { default: Cache }).default;
// buildCacheKeyUrl strips tracking/click-ID params (utm_*, fbclid, brid, …)
// and sorts the rest, so paid-ad clicks — each carrying a unique fbclid +
// utm_* — collapse onto ONE entry instead of each becoming a live SSR→API
// miss (prod 503 storm 2026-06-20). It also appends deployVersion() so each
// deploy starts with a clean edge cache namespace; old entries for the prior
// version naturally expire via s-maxage and never get served.
//
// Construct the cache key with ONLY method + normalized URL. Forwarding
// `context.request.headers` verbatim fragmented the cache by
// Accept-Encoding / Accept / User-Agent, driving the hit rate toward
// zero for anonymous traffic (each browser-family + locale combination
// got its own cache entry). It also included the Cookie header in the
// key — Cloudflare strips it in practice, but relying on undocumented
// behavior is fragile, and tests under miniflare would not strip.
cacheKey = new Request(buildCacheKeyUrl(url.toString(), deployVersion()), {
method: "GET",
});
const cached = await cache.match(cacheKey);
if (cached) {
// Responses returned from the Web Cache API have IMMUTABLE headers.
// If we return this object directly, anything downstream that tries
// to add/modify headers (Astro's RenderContext, the Cloudflare
// adapter, CSP middleware, etc.) throws:
// TypeError: Can't modify immutable headers.
// Wrap the body in a fresh Response with a mutable Headers copy so
// downstream code can modify headers normally.
const hitHeaders = new Headers(cached.headers);
// Observability: an unambiguous marker that this Worker served the
// copy from caches.default. The CF-Cache-Status: HIT and Age that a
// match also carries come from the Cache API, not from a CDN tier in
// front of the Worker (a custom-domain Worker has none) (#1125).
hitHeaders.set("X-Edge-Cache", "HIT");
// Every entry was stored with max-age=0 (see the caching branch
// below), but a match hands it back with the zone's Browser Cache TTL
// instead (dev: max-age=14400), letting a browser hold this HTML for
// 4 h across a deploy. Put the 0 back.
const hitCacheControl = hitHeaders.get("Cache-Control");
if (hitCacheControl) {
hitHeaders.set(
"Cache-Control",
hitCacheControl.replace(/(^|[,\s])max-age=\d+/, "$1max-age=0"),
);
}
applyEnvRobotTag(hitHeaders, context.request, url);
return new Response(cached.body, {
status: cached.status,
statusText: cached.statusText,
headers: hitHeaders,
});
}
}
// SSR error boundary. An unhandled throw in a page's frontmatter (e.g. a
// dereference of API data that violated its type contract) otherwise
// bubbles to the Cloudflare adapter, which returns a bare `text/plain` 503
// with no body we control and no log we retain — invisible to debugging.
// Catch it here so the stack is logged (visible in `wrangler tail` /
// Logpush) and the visitor gets a real, non-cached 500 page instead.
let response: Response;
try {
response = await next();
} catch (err) {
console.error(
"SSR render error:",
url.pathname,
err instanceof Error ? (err.stack ?? err.message) : err,
);
// Report to Sentry. No-op unless this request is running inside
// wrapRequestHandler (i.e. a DSN is configured and we're not local).
Sentry.captureException(err);
return new Response(
'<!doctype html><meta charset=utf-8><title>Something went wrong</title><body style="font-family:system-ui;max-width:32rem;margin:4rem auto;padding:0 1rem;text-align:center"><h1>Something went wrong</h1><p>We hit an unexpected error loading this page. Please try again.</p><p><a href="/">Back to home</a></p>',
{
status: 500,
headers: {
"Content-Type": "text/html; charset=utf-8",
"Cache-Control": "no-store",
},
},
);
}
// A render for a Lighthouse / headless audit leaves GTM out
// (GoogleTagManager.astro). The edge cache is keyed on the URL alone, so a
// stored copy would then be served to every real visitor for up to a day:
// no GA4 page view, and whatsapp_click pushed to a dataLayer nothing reads.
// On dev, /how-it-works was served without GTM 3 times out of 3 (#1086 QA).
// Opting out here makes the caching branch below keep it, and skips the
// edge write, for both the Worker cache and Cloudflare's CDN.
if (isSyntheticAuditor(context.request.headers.get("user-agent"), url)) {
response.headers.set("Cache-Control", "private, no-store");
}
// Early Hints: Cloudflare converts Link headers to 103 Early Hints automatically
// This tells the browser to preconnect to the image domain before the HTML arrives
const imageUrl = env.IMAGE_URL;
if (imageUrl) {
response.headers.append(
"Link",
`<${imageUrl}>; rel=preconnect; crossorigin`,
);
}
// Add security headers
response.headers.set("X-Content-Type-Options", "nosniff");
response.headers.set("X-Frame-Options", "SAMEORIGIN");
response.headers.set("X-XSS-Protection", "1; mode=block");
response.headers.set("Referrer-Policy", "strict-origin-when-cross-origin");
// CSP allows connections to all decorrocket.com subdomains (api, api-preview, etc.),
// the runtime-configured API origin (env.API_URL — required for Conductor workspaces
// where the API runs on a non-default port like 7021/8021), and the canonical
// localhost fallback. The wildcard subdomains cover prod/preview; env.API_URL
// covers any runtime port; the literal fallbacks cover edge cases where env is
// not yet bound (e.g. early-error responses). See:
// https://github.com/withastro/astro/issues/11555
const allowedOrigins = [
"https://*.decorrocket.com", // All production/preview subdomains
"https://*.interioring.com", // All production subdomains (new brand)
env.API_URL, // Runtime API origin (Conductor port slot, e.g. http://localhost:7021)
DEFAULT_LOCAL_API_URL, // Canonical localhost fallback (legacy port 7001)
"http://localhost:8887", // Worktree API development
]
.filter(Boolean)
.join(" ");
// Content Security Policy for marketplace pages
// More permissive than API since we need to load styles, scripts, and images.
// Third-party vendor origins (GTM, GA4, Ads, etc.) live in CSP_ALLOWLIST
// (./lib/csp-allowlist.ts) — append new vendor URLs there, not here. The
// joined forms (`CSP_SCRIPT_SRC` etc.) are pre-computed at module load.
const csp = [
"default-src 'self'",
// Allow inline styles for Tailwind/Astro
"style-src 'self' 'unsafe-inline'",
// Allow inline scripts for Astro hydration + Cloudflare Web Analytics (auto-injected via observability)
`script-src 'self' 'unsafe-inline' https://static.cloudflareinsights.com ${CSP_SCRIPT_SRC}`,
// Allow images from self, API (for R2 images), and data URIs
`img-src 'self' data: blob: https: ${allowedOrigins} ${CSP_IMG_SRC}`,
// Allow fonts from self (self-hosted via fontsource)
"font-src 'self'",
// Allow connections to API, WhatsApp, Cloudflare Analytics beacon, and third-party analytics
`connect-src 'self' https://wa.me https://cloudflareinsights.com https://*.ingest.us.sentry.io ${allowedOrigins} ${CSP_CONNECT_SRC}`,
// Our own forms, plus the vendors that submit a form to transmit an
// event (the Meta Pixel does this when it cannot use a beacon)
`form-action 'self' ${CSP_FORM_ACTION}`,
// Allow framing only by self
"frame-ancestors 'self'",
// Allow YouTube embeds + third-party tag manager iframes
`frame-src 'self' https://www.youtube-nocookie.com https://www.youtube.com ${CSP_FRAME_SRC}`,
// Contentsquare session replay serializes the DOM in a blob: web worker;
// without these it falls back to default-src 'self' and is blocked
"worker-src 'self' blob:",
"child-src 'self' blob:",
// Block object embeds
"object-src 'none'",
// Base URI restriction
"base-uri 'self'",
].join("; ");
response.headers.set("Content-Security-Policy", csp);
// Permissions Policy (formerly Feature Policy)
response.headers.set(
"Permissions-Policy",
"camera=(), microphone=(), geolocation=()",
);
// Add caching headers
if (
url.pathname.startsWith("/_astro/") ||
url.pathname.match(
/\.(js|css|woff2?|ttf|otf|eot|svg|png|jpg|jpeg|gif|webp|ico)$/,
)
) {
// Static assets with fingerprinted filenames — cache forever when the
// asset actually exists. For 4xx/5xx (typically a stale HTML reference
// to an old hash from a prior deploy, e.g. `/_astro/client.OLD.js`),
// use short no-store caching so the browser re-fetches the HTML on
// next nav and picks up the current asset hashes. Without this guard,
// a 1-year immutable cache pins the 404 in the browser and the user
// sees a broken site until they hard-refresh.
if (response.status >= 200 && response.status < 400) {
response.headers.set(
"Cache-Control",
"public, max-age=31536000, immutable",
);
} else {
response.headers.set("Cache-Control", "no-store, max-age=0");
}
} else if (
context.request.method === "GET" &&
!url.pathname.startsWith("/api/")
) {
// Respect an explicit cache opt-out the page already set (e.g. the
// homepage when it rendered an empty state, or a personalized/dynamic
// page) — never promote it to a public, edge-cacheable header. Without
// this guard the default branch below would overwrite a no-store /
// no-cache / private directive and the edge could pin an empty render
// or, worse, a private response.
const pageCacheControl = response.headers.get("Cache-Control");
const pageOptedOut =
pageCacheControl != null &&
(pageCacheControl.includes("no-store") ||
pageCacheControl.includes("no-cache") ||
pageCacheControl.includes("private"));
if (!pageOptedOut) {
// Per-path edge-TTL floor: listings revalidate faster (new pros/
// projects appear) than detail/static pages. These are the minimum
// edge lifetimes; a page may raise them (see below).
const isListing = ["/pros", "/projects", "/rooms"].some(
(p) => url.pathname === p || url.pathname === `${p}/`,
);
const floorSMaxage = isListing ? 1800 : 900;
const floorSwr = isListing ? 3600 : 1800;
// A page can declare a LONGER edge TTL via setCacheHeaders (e.g.
// `static`/`blog-post`/`faq-hub` = 1 day, `city-hub`/`calculator` =
// 1 hour). Previously this branch unconditionally overwrote those
// presets, capping every page at the floor and discarding the
// page's intent — rarely-changing pages got the same 15-min edge
// life as the homepage. Honor whichever is larger so static content
// gets a high edge hit rate; never drop below the per-path floor.
//
// `max-age` is always 0: a browser must never hold HTML that
// references fingerprinted `/_astro/*` assets from a prior deploy
// (broken hydration until the browser cache expires). The shared
// edge copy is deploy-safe because the cache key is namespaced by
// deployVersion().
const pageSMaxage = pageCacheControl
? cacheControlSeconds(pageCacheControl, "s-maxage")
: undefined;
const pageSwr = pageCacheControl
? cacheControlSeconds(pageCacheControl, "stale-while-revalidate")
: undefined;
const sMaxage = Math.max(floorSMaxage, pageSMaxage ?? 0);
const swr = Math.max(floorSwr, pageSwr ?? 0);
response.headers.set(
"Cache-Control",
`public, max-age=0, s-maxage=${sMaxage}, stale-while-revalidate=${swr}`,
);
}
}
// Prevent downstream/CDN caching of personalized pages. /account/* is
// always opted out — even without a session cookie — so the bfcache
// can't restore a stale signed-in render after sign-out (issue #462).
// The cookie-based branch still covers other personalized surfaces
// (e.g. /projects with the user's avatar in UserMenu).
const isAccountPath =
url.pathname === "/account" || url.pathname.startsWith("/account/");
if (hasSessionCookie || isAccountPath) {
response.headers.set("Cache-Control", "private, no-store");
}
applyEnvRobotTag(response.headers, context.request, url);
// --- Edge Cache: store successful HTML responses ---
// Skip the write when the final Cache-Control opts out of shared caching —
// no-store (empty homepage render), no-cache, or private (personalized
// pages) — so the edge never pins a render that explicitly opted out.
const responseCacheControl = response.headers.get("Cache-Control");
const responseOptedOut =
responseCacheControl != null &&
(responseCacheControl.includes("no-store") ||
responseCacheControl.includes("no-cache") ||
responseCacheControl.includes("private"));
if (
edgeCacheable &&
cache &&
cacheKey &&
response.status === 200 &&
!responseOptedOut
) {
// Astro 6 + @astrojs/cloudflare 13 expose the ExecutionContext
// as `Astro.locals.cfContext` (replacing the old runtime.ctx).
const waitUntil = context.locals?.cfContext?.waitUntil?.bind(
context.locals.cfContext,
);
if (waitUntil) {
// Store only a complete render. A visitor who navigates away mid-stream
// cancels the SSR stream, and the clone then ends early; caching that
// would serve a truncated page (no menu, no closing scripts) to every
// visitor at the PoP for s-maxage. HTML must end in </html>.
const edgeCache = cache;
const key = cacheKey;
const copy = response.clone();
const isHtml = (copy.headers.get("Content-Type") ?? "").includes("text/html");
waitUntil(
copy
.text()
.then((body) => {
if (isHtml && !/<\/html>\s*$/i.test(body)) return;
return edgeCache.put(
key,
new Response(body, {
status: copy.status,
statusText: copy.statusText,
headers: copy.headers,
}),
);
})
.catch(() => {}),
);
}
}
// Observability for the Worker edge cache (a HIT returns earlier with
// X-Edge-Cache: HIT). MISS = freshly rendered and eligible to populate the
// cache; BYPASS = not edge-cached this request (session cookie present, or
// the page opted out via no-store/no-cache/private).
if (cacheable) {
response.headers.set(
"X-Edge-Cache",
edgeCacheable && !responseOptedOut ? "MISS" : "BYPASS",
);
}
return response;
};
// Wrap the request in Sentry on Cloudflare Workers so unhandled SSR exceptions
// (and traces) are captured per-request and flushed via the Worker execution
// context. wrapRequestHandler needs that context to flush, so when it's absent
// — or no DSN is set, or we're local — run the handler unwrapped (Sentry then
// no-ops). DSN comes from the per-env `SENTRY_DSN` binding so each app reports
// to its own project.
export const onRequest = defineMiddleware((context, next) => {
const dsn = env.SENTRY_DSN;
const environment = env.ENVIRONMENT || "local";
const cfContext = context.locals?.cfContext;
if (!dsn || environment === "local" || !cfContext) {
return handleRequest(context, next);
}
return Sentry.wrapRequestHandler(
{
options: {
dsn,
environment,
tracesSampleRate: sentryTracesSampleRate(environment),
},
request: context.request,
context: cfContext as unknown as Parameters<
typeof Sentry.wrapRequestHandler
>[0]["context"],
},
() => handleRequest(context, next),
);
});
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