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apps/leafcutter/pages/api/proxy/[[...path]].ts

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+import { createProxyMiddleware } from "http-proxy-middleware";
+import { NextApiRequest, NextApiResponse } from "next";
+import { getToken } from "next-auth/jwt";
+
+const withAuthInfo =
+  (handler) => async (req: NextApiRequest, res: NextApiResponse) => {
+    const session = await getToken({
+      req,
+      secret: process.env.NEXTAUTH_SECRET,
+    });
+
+    if (!session) {
+      return res.redirect("/login");
+    }
+
+    req.headers["x-proxy-user"] = session.email.toLowerCase();
+    req.headers["x-proxy-roles"] = "leafcutter_user";
+    const auth = `${session.email.toLowerCase()}:${process.env.OPENSEARCH_USER_PASSWORD}`;
+    const buff = Buffer.from(auth);
+    const base64data = buff.toString("base64");
+    req.headers.Authorization = `Basic ${base64data}`;
+    return handler(req, res);
+  };
+
+const proxy = createProxyMiddleware({
+  target: process.env.OPENSEARCH_DASHBOARDS_URL,
+  changeOrigin: true,
+  xfwd: true,
+});
+
+export default withAuthInfo(proxy);
+
+export const config = {
+  api: {
+    bodyParser: false,
+    externalResolver: true,
+  },
+};