Ytukyg

I am a newbie with Node JS and i recently made all the APIs which are working exactly as i want. However, now i want some of them (example handler.home) to return a static html template also. But, now i am getting an error as below....

Server.js

const config = require('../config');



//Dependencies

const http = require('http');

const https = require('https');

//file system support to read files

var fs = require('fs');

//path module to access directories

var path = require('path');

var url = require('url');



//importing the handlers

var handlers = require('./handlers');



//importing helpers

var helpers = require('./helpers');



var stringDecoder = require('string_decoder').StringDecoder;





//server object to handle all the tasks

let server = {}



//creating a server from the https module which defines what to do when the server is created

server.httpsServerOptions = {

    'key': fs.readFileSync(path.join(__dirname, '/../https/key-pem')),

    'cert': fs.readFileSync(path.join(__dirname, '/../https/cert.pem'))

};



//creating a server from the http module which defines what to do when the server is created

server.httpServer = http.createServer(function(req, res){

    server.unifiedServer(req, res);

});



server.httpsServer = https.createServer(server.httpsServerOptions, function(req, res){

    server.unifiedServer(req, res);

});



server.unifiedServer = function(req,res){

    //steps of parsing a user request



    //GET the method of request -> get/put/delete/post

    var method = req.method.toLowerCase();

    //PARSE THE URL / get the url

    var parsedUrl = url.parse(req.url, true);

    var path = parsedUrl.pathname;

    var queryObject = parsedUrl.query;

    var trimmedPath = path.replace(/^/+|/+$/g, '');



    //Read Headers

    var urlHeaders = req.headers;



    var decoder = new stringDecoder('utf-8');

    var bufferPayload = '';



    //event handler when some data is recieved in the payload / body

    req.on('data', (data) => {



        bufferPayload += decoder.write(data);

    });



    req.on('end', () => {

        bufferPayload += decoder.end();



        //ROUTE TO A SPECIFIC HANDLER BASED ON ROUTING OBJECT, ROUTE TO NOTFOUND IF NOT FOUND

        var selectedHandler = typeof(server.router[trimmedPath]) !== 'undefined' ? handlers[trimmedPath] : handlers.notFound;

        //once the handler is specified, we need to send some data to it as expected by the handler

        var data  = {

            'headers': urlHeaders,

            'method': method,

            'pathname': trimmedPath,

            'payload': helpers.convertJSONstr2JSON(bufferPayload),

            'queryString': queryObject

        }

        //send the data and look for callback

        selectedHandler(data, (statusCode, payload, contentType) => {

            console.log("entered")

            //send a default status code of 200 if no status code is defined

            statusCode = typeof(statusCode) == 'number' ? statusCode : 200;

            //set contentType to json if no contentType is provided for rendering

            contentType = typeof(contentType) == 'string' ? contentType : 'json';

            if(contentType == 'json'){

                res.setHeader('Content-Type', 'application/json');

                payload = typeof(payload) == 'object' ? JSON.stringify(payload) : JSON.stringify({});

            }

            if (contentType == 'html'){

                res.setHeader('Content-Type', 'text/html');

                payload = typeof(payload) == 'string' ? payload : '';

            }

            res.writeHead(statusCode);



            //SEND THE RESPOSE FROM THE SERVER

            res.end(payload);



            //LOG IF YOU NEED TO THE CONSOLE

            if(statusCode == 200){

                //display in green

                console.log('x1b[32m%sx1b[0m',"response on ", method +" " +trimmedPath, " ->", statusCode);       

            }

            else {

                //for any non 200 status, display in red

                console.log('x1b[31m%sx1b[0m',"response on ", method +" " +trimmedPath, " ->", statusCode);

            }

        });

    });

};



server.router = {

    '' : handlers.home,

    'account/create': handlers.accountCreate,

    'account/edit': handlers.accountEdit,

    'account/deleted': handlers.accountDeleted,

    'session/create' : handlers.sessionCreate,

    'session/deleted' : handlers.sessionDeleted,

    'checks/create' : handlers.checksCreate,

    'checks/all': handlers.checkList,

    'checks/edit': handlers.checksEdit,

    'ping': handlers.ping,

    'api/users': handlers.users,

    'api/tokens': handlers.tokens,

    'api/checks': handlers.checks

};



//intitialise the server file

server.init = ()=>{



    server.httpServer.listen(config.httpPort, function(){

        console.log('x1b[36m%sx1b[0m',"the server is listening on port "+config.httpPort + " ["+config.envName+"] ");

    });



    server.httpsServer.listen(config.httpsPort, function(){

        console.log('x1b[35m%sx1b[0m',"the server is listening on port "+config.httpsPort + " ["+config.envName+"] ");

    });

};



module.exports = server;

handlers.js

/*

*This file stores all the handlers

*

*/





//dependencies

let dataLib = require('./data');

let helpers = require('./helpers');

let config = require('../config');



//main code

let handlers = {};



/*

*   HTML API HANDLERS BELOW

*

*/



handlers.home = function(data, callback){

    console.log("found index ->", data);

    callback(200, 'undefined', 'html');

};

module.exports = handlers;

And the error that i am recieving is

Now what i want is to be able to respond if the contentType is html, which is not working right now. If i don't provide the contentType and set the behavior of the api to return json, everything works fine. Any ideas?