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feat(core): carry the request context in an AsyncLocalStorage

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Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Clintchiz
2026-08-20 02:46:24 +05:30
co-authored by Claude Opus 5
parent 953b1cd692
commit 680ea73975
4 changed files with 151 additions and 61 deletions
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packages/dev-server/src/runtime.ts
+64 -61
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@@ -23,6 +23,7 @@ import {
isSafeRequestPath,
renderError,
renderNotFound,
runWithRequestContext,
withContextHeaders,
withSecurityHeaders,
resolveRequestUrl,
@@ -1266,71 +1267,73 @@ export function createHandlers(deps: RuntimeDeps): Handlers {
return secure(new Response("Expected a WebSocket upgrade request", { status: 426 }));
}
try {
const ctx = createContext(req, url);
initializeRequestCache(ctx);
ctx.ip = server.requestIP?.(req)?.address ?? undefined;
ctx.locals.cspNonce = nonce; // available to pages for their own inline scripts
if (!["GET", "HEAD", "OPTIONS"].includes(req.method.toUpperCase())) {
const contentType = req.headers.get("content-type") ?? "";
if (contentType.includes("form")) {
try {
const form = await req.clone().formData();
const token = form.get("_csrf");
if (typeof token === "string") ctx.locals._csrf = token;
} catch {
// The endpoint will return its normal malformed-input response.
const ctx = createContext(req, url);
return runWithRequestContext(ctx, async () => {
try {
initializeRequestCache(ctx);
ctx.ip = server.requestIP?.(req)?.address ?? undefined;
ctx.locals.cspNonce = nonce; // available to pages for their own inline scripts
if (!["GET", "HEAD", "OPTIONS"].includes(req.method.toUpperCase())) {
const contentType = req.headers.get("content-type") ?? "";
if (contentType.includes("form")) {
try {
const form = await req.clone().formData();
const token = form.get("_csrf");
if (typeof token === "string") ctx.locals._csrf = token;
} catch {
// The endpoint will return its normal malformed-input response.
}
}
}
}
// Resolve the request language so both pages and API can translate.
if (deps.i18n) {
ctx.lang = resolveLang(
deps.i18n,
ctx.cookies.get(deps.i18n.cookie.name),
req.headers.get("accept-language"),
// Resolve the request language so both pages and API can translate.
if (deps.i18n) {
ctx.lang = resolveLang(
deps.i18n,
ctx.cookies.get(deps.i18n.cookie.name),
req.headers.get("accept-language"),
);
ctx.t = makeT(deps.i18n, ctx.lang);
}
const mws = await resolveMiddleware();
const res = secure(
withContextHeaders(ctx, await runMiddleware(mws, ctx, () => dispatch(ctx))),
);
ctx.t = makeT(deps.i18n, ctx.lang);
return compressResponse(req, res);
} catch (err) {
const app = process.env.WRNEXUS_APP_NAME ?? "app";
let detail =
err instanceof Error ? (err.stack ?? `${err.name}: ${err.message}`) : String(err);
const message = err instanceof Error ? `${err.name}: ${err.message}` : String(err);
// AggregateError (e.g. Bun.build() "Bundle failed") hides its real cause in
// `.errors` — the top-level message/stack alone is useless for diagnosing a
// failed bundle. Print every nested error so the actual failure is visible.
const nested = (err as { errors?: unknown[] } | undefined)?.errors;
if (Array.isArray(nested) && nested.length) {
detail +=
"\n caused by:\n" +
nested
.map((e, i) => ` [${i}] ${e instanceof Error ? (e.stack ?? e.message) : String(e)}`)
.join("\n");
}
console.error(
`[wrnexus] unhandled request error (${app}) ${req.method} ${url.pathname}\n${detail}`,
);
deps.devToolbar?.collector.add(
issueFromError(err, {
ruleId: "server/request-error",
category: "server",
title: "Request processing failed",
pathname: url.pathname,
}),
);
const response = secure(renderError(err, mode));
// Gateway-managed production apps bind to loopback. Carry a bounded,
// encoded diagnostic to the parent gateway so centralized log collectors
// can explain child failures; the gateway always strips this header.
response.headers.set("x-wrnexus-internal-error", encodeURIComponent(message.slice(0, 500)));
return compressResponse(req, response);
}
const mws = await resolveMiddleware();
const res = secure(
withContextHeaders(ctx, await runMiddleware(mws, ctx, () => dispatch(ctx))),
);
return compressResponse(req, res);
} catch (err) {
const app = process.env.WRNEXUS_APP_NAME ?? "app";
let detail =
err instanceof Error ? (err.stack ?? `${err.name}: ${err.message}`) : String(err);
const message = err instanceof Error ? `${err.name}: ${err.message}` : String(err);
// AggregateError (e.g. Bun.build() "Bundle failed") hides its real cause in
// `.errors` — the top-level message/stack alone is useless for diagnosing a
// failed bundle. Print every nested error so the actual failure is visible.
const nested = (err as { errors?: unknown[] } | undefined)?.errors;
if (Array.isArray(nested) && nested.length) {
detail +=
"\n caused by:\n" +
nested
.map((e, i) => ` [${i}] ${e instanceof Error ? (e.stack ?? e.message) : String(e)}`)
.join("\n");
}
console.error(
`[wrnexus] unhandled request error (${app}) ${req.method} ${url.pathname}\n${detail}`,
);
deps.devToolbar?.collector.add(
issueFromError(err, {
ruleId: "server/request-error",
category: "server",
title: "Request processing failed",
pathname: url.pathname,
}),
);
const response = secure(renderError(err, mode));
// Gateway-managed production apps bind to loopback. Carry a bounded,
// encoded diagnostic to the parent gateway so centralized log collectors
// can explain child failures; the gateway always strips this header.
response.headers.set("x-wrnexus-internal-error", encodeURIComponent(message.slice(0, 500)));
return compressResponse(req, response);
}
});
}
async function dispatch(ctx: Context): Promise<Response> {