HTTP Endpoints

HTTP Endpoints

HTTP vals (fileType: "http") export a request handler and run on every incoming HTTP request. Each HTTP file is assigned a live URL — never construct it yourself; read links.endpoint from list_files or create_file responses, or call fetch_val_endpoint.

That URL is open to anyone unless the val's app access (httpPrivacy) is restricted, in which case unauthenticated callers get a 302 to a login page instead of your response — see the restricted-access skill.

Basic handler

// Learn more: https://docs.val.town/vals/http/
export default async function (req: Request): Promise<Response> {
  return Response.json({ ok: true });
}

The file must have an export — export default for the handler.

Hono

When using Hono, export app.fetch (not app):

import { Hono } from "npm:hono";
import { parseVal, serveImmutableFile } from "https://esm.town/v/std/utils/index.ts";

const app = new Hono();

app.get("/", (c) => c.text("hello"));

// Immutable asset caching (see the client-side-js skill): serves the
// current-version URLs your HTML shell stamps with immutableFileUrl()
app.get("/__immutable/*", (c) => serveImmutableFile(c.req.path));

// View source redirect
app.get("/source", (c) => c.redirect(parseVal().links.self.val));

// Always add this for full stack traces on errors:
app.onError((err) => Promise.reject(err));

export default app.fetch;