link-stack/apps/link/metamigo-add/api/graphql/[[...path]]/route.ts

import { createProxyMiddleware } from "http-proxy-middleware";

export const POST = createProxyMiddleware({
  target:
    process.env.NODE_ENV === "production"
      ? "http://metamigo-api:3001"
      : "http://127.0.0.1:3001",
  changeOrigin: true,
  pathRewrite: { "^/graphql": "/graphql" },
  xfwd: true,
  onProxyReq(proxyReq, req, _res) {
    const auth = proxyReq.getHeader("authorization");
    if (auth) {
      // pass along user provided authorization header
      return;
    }

    // Else extract the session token from the cookie and pass
    // as bearer token to the proxy target
    let token = req.cookies["__Secure-next-auth.session-token"];
    if (!token) token = req.cookies["next-auth.session-token"];

    if (token) {
      proxyReq.setHeader("authorization", `Bearer ${token}`);
      proxyReq.removeHeader("cookie");
    } else {
      console.error("no token found. proxied request to backend will fail.");
    }
  },
});