ls-deno/routes/_middleware.ts

import { MiddlewareHandlerContext } from "$fresh/server.ts";
import { deleteCookie, getCookies } from "$std/http/cookie.ts";
import { getUserFromNonExpiredLoginToken } from "@/db/mod.ts";

interface State {
  data: string;
}

export async function handler(
  request: Request,
  ctx: MiddlewareHandlerContext<State>,
) {
  ctx.state.data = "";
  let hasBadAuthCookie = false;
  const { lsauth } = getCookies(request.headers);
  console.log("lsauth cookie:", lsauth);
  if (lsauth) {
    const user = await getUserFromNonExpiredLoginToken(lsauth);
    if (!user) hasBadAuthCookie = true;
    else {ctx.state.data += "user:" + JSON.stringify({
        id: user.id,
        username: user.username,
        displayName: user.displayName || user.username,
      }) +
        "\n";}
  }

  const resp = await ctx.next();
  if (resp) {
    resp.headers.set("server", "fresh server");
    if (hasBadAuthCookie) deleteCookie(resp.headers, "lsauth");
  }
  return resp;
}