oneuptime/TestServer/API/Main.ts

import LocalCache from 'CommonServer/Infrastructure/LocalCache';
import Express, {
    ExpressRequest,
    ExpressResponse,
    ExpressRouter,
    NextFunction,
    RequestHandler,
} from 'CommonServer/Utils/Express';
import Response from 'CommonServer/Utils/Response';
import Sleep from 'Common/Types/Sleep';
import Typeof from 'Common/Types/Typeof';
import { JSONValue } from 'Common/Types/JSON';
import logger from 'CommonServer/Utils/Logger';

const router: ExpressRouter = Express.getRouter();

router.get(
    '/',
    async (
        req: ExpressRequest,
        res: ExpressResponse,
        next: NextFunction
    ): Promise<void> => {
        returnResponse(req, res, next);
    }
);

router.post(
    '/',
    async (
        req: ExpressRequest,
        res: ExpressResponse,
        next: NextFunction
    ): Promise<void> => {
        returnResponse(req, res, next);
    }
);

const returnResponse: RequestHandler = async (
    req: ExpressRequest,
    res: ExpressResponse,
    next: NextFunction
): Promise<void> => {
    try {
        logger.debug('Request Headers: ');
        logger.debug(req.headers);
        logger.debug('Request Body: ');
        logger.debug(req.body);

        const responseCode: number | undefined =
            LocalCache.getNumber('TestServer', 'responseCode') || 200;
        const responseTime: number | undefined =
            LocalCache.getNumber('TestServer', 'responseTime') || 0;
        const responseBody: string | undefined =
            LocalCache.getString('TestServer', 'responseBody') || '';
        let responseHeaders: JSONValue | undefined =
            LocalCache.getJSON('TestServer', 'responseHeaders') || {};

        logger.debug('Response Code: ' + responseCode);
        logger.debug('Response Time: ' + responseTime);
        logger.debug('Response Body: ');
        logger.debug(responseBody);
        logger.debug('Response Headers: ');
        logger.debug(responseHeaders);

        if (responseHeaders && typeof responseHeaders === Typeof.String) {
            responseHeaders = JSON.parse(responseHeaders.toString());
        }

        if (responseTime > 0) {
            await Sleep.sleep(responseTime);
        }

        // middleware marks the probe as alive.
        // so we don't need to do anything here.
        return Response.sendCustomResponse(
            req,
            res,
            responseCode,
            responseBody,
            responseHeaders ? (responseHeaders as any) : {}
        );
    } catch (err) {
        return next(err);
    }
};

export default router;