gluestick/src/app/oauth/discord/login/route.ts

import { discordRedirectUri } from "../oauth";

export async function GET(request: Request) {
  let url = `https://discord.com/oauth2/authorize`;

  let randomAssString = Math.random().toString(36).substring(2, 15);

  let params = new URLSearchParams();
  params.set("response_type", "code");
  params.set("client_id", process.env.DISCORD_CLIENT_ID);
  params.set("scope", "guilds identify email");
  params.set("state", randomAssString);
  params.set("redirect_uri", discordRedirectUri());
  params.set("prompt", "consent");

  url += "?" + params.toString();

  return new Response(null, {
    status: 302,
    headers: {
      Location: url,
      "Set-Cookie": `state=${randomAssString}; Path=/;`
    }
  });
}