Function fetch

examples/worker-javascript/src/index.ts:44–74

(request: Request, env: Env)

export default {
  async fetch(request: Request, env: Env): Promise<Response> {
    const url = new URL(request.url);

    const fileMatch = url.pathname.match(/^\/c\/([^/]+)\/file\/(.+)$/);
    if (fileMatch) {
      const resolved = resolveMountPath(fileMatch[2]);
      if (resolved === null) {
        return errorJSON(new Error(`path must sit under ${MOUNT_ROOT}; got /${fileMatch[2]}`), 400);
      }
      return handleFile(request, env, fileMatch[1], resolved);
    }

    const execMatch = url.pathname.match(/^\/c\/([^/]+)\/exec\/?$/);
    if (execMatch) return handleExec(request, env, execMatch[1]);

    if (url.pathname === "/" || url.pathname === "") {
      return new Response(
        [
          "worker-javascript example",
          "",
          `  PUT  /c/<name>/file/workspace/<path>     write file at ${MOUNT_ROOT}/<path>`,
          `  GET  /c/<name>/file/workspace/<path>     read file at ${MOUNT_ROOT}/<path>`,
          "  POST /c/<name>/exec                      run an ECMAScript module (JSON result)",
          "",
        ].join("\n"),
        { headers: { "content-type": "text/plain" } },
      );
    }

    return new Response("not found", { status: 404 });
  },
} satisfies ExportedHandler<Env>;

async function handleFile(