pangolin/server/index.ts

import express, { Request, Response } from "express";
import next from "next";
import { parse } from "url";
import environment from "@server/environment";
import logger from "@server/logger";
import helmet from "helmet";
import cors from "cors";
import {
    errorHandlerMiddleware,
    rateLimitMiddleware,
} from "@server/middlewares";
import internal from "@server/routers/internal";
import { authenticated, unauthenticated } from "@server/routers/external";
import cookieParser from "cookie-parser";

const dev = environment.ENVIRONMENT !== "prod";

const app = next({ dev });
const handle = app.getRequestHandler();

const externalPort = environment.EXTERNAL_PORT;
const internalPort = environment.INTERNAL_PORT;

app.prepare().then(() => {
    // External server
    const externalServer = express();

    externalServer.use(helmet());
    externalServer.use(cors());
    externalServer.use(cookieParser());
    externalServer.use(express.json());
    externalServer.use(rateLimitMiddleware);

    const prefix = `/api/v1`;
    externalServer.use(prefix, unauthenticated);
    externalServer.use(prefix, authenticated);

    // We are using NEXT from here on
    externalServer.all("*", (req: Request, res: Response) => {
        const parsedUrl = parse(req.url!, true);
        handle(req, res, parsedUrl);
    });

    externalServer.listen(externalPort, (err?: any) => {
        if (err) throw err;
        logger.info(
            `Main server is running on http://localhost:${externalPort}`,
        );
    });

    externalServer.use(errorHandlerMiddleware);

    // Internal server
    const internalServer = express();

    internalServer.use(helmet());
    internalServer.use(cors());
    internalServer.use(cookieParser());
    internalServer.use(express.json());

    internalServer.use(prefix, internal);

    internalServer.listen(internalPort, (err?: any) => {
        if (err) throw err;
        logger.info(
            `Internal server is running on http://localhost:${internalPort}`,
        );
    });
});