Develop Reference

How to detect Minecraft Singleplayer LAN port

Some Backstory
So I really need help with this project I am making that is suppose to try to find an open port from my Minecraft SinglePlayer LAN. As making something like that is easier then creating a server. To help with my project, I use this API https://mcapi.us/, which helps getting the status.
Firstly, I did try to use a for loop to loop through a huge range but with registering it through the API, it overloads my computer CPU. Secondly, I tried finding some help online and found about web workers and saw I could divide up work. It was about perfect but then seen that I cannot use the API (The most important part) on it as the elements that is in the API, web-workers cannot use.
The Problem:
So the problem is that I cannot properly range through a huge number like 10000 to 65535 as just running that through the API method overloads my CPU. I have also tried using PHP as well but no luck as it takes too long to read through all the numbers. I am probably going to have to use PHP though as it seems to be more powerful. But I need some way to get the Minecraft Singleplayer LAN port and I can't find any way to do that at all.
Reason:
The reason I need some way to access it is so I can make a web application to post the port the Minecraft Singleplayer LAN is running on and if offline will say another message. This way I can just send the web url to a friend and they can continuously just copy and paste the address and port for easy access so I don't have to keep sharing the port as that is non-efficient. One more thing as well, I am using Minecraft version that is before 1.13, not at 1.13 or after.
Question Update:
I have in fact made this question more clear to what I originally meant as what I said people was unclear so I updated this to be more clear. Plus Stack Overflow is kinda forcing me to make it more clear. So here, I hope this is clear for everyone.

Sending data to and from two applications?

I'm trying to write a test application for hardware and it needs to be webbased however the actual program for controlling the hardware is already made.
I made a webpage with html and javascript but i need to send data between these two applications, the applications both run on the same machine. I tried looking on the web but I cant figure it out. If anyone has an example or a direction for me to look at/in I would appreciate it.

jQuery alternatives for multiplayer games?

First off, I am not asking for any code or anything like that.
all I need is some advise.
I'm creating a roulette game and everything in my roulette game is based on jQuery.
however, as we all know, jQuery is client side so I was thinking about using AJAX to send some details back to server and from the server to the users browser so I can make this roulette game work in "multiplayer" fashion... But the issue is that I don't think its possible to send the roulette's wheel animation to the server and back to users browser so I am a bit confused about this!
In my research I came across some information (old ones) about using node.js and jquery together! I don't know if this is possible or how easy it would be to use my jquery code in node.js as I have never used node.js before..
so the question that i have is:
based on the information i provided above and my requirements, what are my options?
can I use AJAX to achieve what i am trying to do and if so, a bit
information would be great.
if AJAX is out of question, is it possible to use my jquery code in
node.js to achieve what I am trying to do?
ANY ADVISE WOULD BE APPRECIATED.
P.S. I don't want to use HTML5 as 1st I don't know much about HTML5 and also, some devices, browsers do not support it.
Thanks

The best way is to use websockets to ensure real time communication. One of the best alternatives for implementing that could be using a server under node.js. Have a look to this video from Code School node.js tutorials: https://www.youtube.com/watch?v=mtDK4jf4RS0 where is ilustrated how to implement a real time chat. Your problem is based on the same.

There are three parts to a multiplayer game displayed in a browser:
client-side display,
server-side data management,
client-server communication.
If you're already set on your display technology (jQuery), then you're probably going to use $.ajax() for client-server communication. However, technologies used for server-side data management are completely up to you and they don't necessarily have any connection to the technologies used for display and communication (meaning the traditional communication initiated by client).
Basically, use any kind of server technology stack you like. Node.js might do just fine but there are many other viable alternatives. They just need to support communication with the client.
So, to be absolutely clear, your question doesn't really make sense. You might use jQuery in the client and Node.js on the server, but they will never really "work together". They will manage completely separate parts of your application and connect through protocols not specific to either of them.
As for the animation, the animation itself is solely a client-side problem. If you want to "synchronize the animation" across multiple clients, you can let the clients communicate with the server, but they only ever need to send/receive plain data. Then you adjust the client-side animation based on the received data.
As another poster points out, websockets are a better fit for this than regular client-initiated HTTP requests. Not because of "the animation", but because you want all the clients to receive the information about the start of betting at the same time.

I am also developing a MMO game using javascript only. Firstly, there are two different types of javascript here. Usual client side javascript (the one you already know) and the server side javascript (i.e. Node.js).
You will need to develop both client and server before connecting them with jQuery's Ajax. So you need to study Node.js before designing overall architecture of your game.
I read many Node.js tutorials and watched many youtube tutorial videos but I was still confused, before I really sat down and read a good textbook that explained from basics, one like below. Try to get hold of it from your local library.
Express web application development learn how to develop web applications with the Express framework from scratch by Hage Yaapa
Express is the popular framework that runs on Node.js now. So it's worth getting familiar with Express Framework. Once you understand how express app works (not so difficult), you will see how you can frame your game structure like I did :)
In order for many clients to share same animation, there must a server that synchronizes the game state. Ajax can only link between server-client communication in my understanding. There is no mechanism that connects between clients. The clients ask server what number was the result of roulette roll and show the corresponding animations.

Yes, you can use NodeJS and jQuery together.
NodeJS is server-side, meaning that you set up a server (a lot of people use the Express module, which is easy to use), which serves content to clients asking for it. Your server-side code can be in any language supporting sockets, not just NodeJS. But NodeJS is easy to use if you know JS already.
jQuery is client-side, meaning that it's executed by the user's browser, and may or may not have a server-side component (if it doesn't need it), or it might have one where it sends requests to the server-side code. When it requests a page from the server, it can be static content (like when you request index.html) or dynamic via an AJAX request. Client-side browser code must be HTML/CSS/JS (you can't make Firefox or Chrome interpret C, for example).

Dilemma... Which Program & Language to develop my Android and iOS App

I'm developing an app for both the android and ios platform. I'd like to take a route that allows me to only have to code once for both platforms. There are 2 options I've come across:
Develop in Flash builder 4.5 with flex (actionscript, or I've heard javascript also?)
Develop using Phonegap (javascript)
The app is very simple - it will use the google api and the phone's geolocation function, then also display more information about the business listings from google map's api. Downloaders of the app will also have to register to become free members. All of this information will have to be put into a mysql database on my server.
So my question is, which is the best route to take with what I am hoping to accomplish? If using Flash builder, is it best to learn actionscript or javascript? What's the best way to connect with the mysql server if I'm writing in javascript, ajax?

If you are serious about it and want to create other apps as well in the future, you should learn the native frameworks/languages for each of the platforms. If not, and you just want to make one quick app I would choose Phonegap rather than Flex/Flash.

Firstly, get familiar with HTML and Javascript to understand what they are even capable of. There's no point in trying to complete a project with tools that you don't understand. As for the options you named, I'd definitely go with the Phonegap method as it is much simpler.
However, you also need a backend for your solution if you're trying to use a MySQL or other database to store any data. For this you'd need some server-side language like PHP, JSP (or you could use NodeJS, if you want Javscript on the server too) etc, that retrieves information from the database according to the requests received from your app.
In conclusion, I'd suggest you to read more about PHP/MySQL, Javascript and making webpages, since this is what you are actually trying to do if you use Phonegap, even though you might look it as an app. Do some tutorials, get to know the languages before you try to take on something that surpasses your skill level just yet.

For a nice small db-interface I'd rather suggest using ruby (with sinatra as mvc-framework and activerecord on top of mysql, or just use rails) than using php!
http://guides.rubyonrails.org
http://www.sinatrarb.com/

Is there any way to prevent people from making my web game available offline?

It's not the type of game that really need a server to operate. I'm using javascript and html5 right now, and I cant think of a way to prevent the game from being rip off.
Using obsfucator is useless, the game would still work offline.
Implementing a validation scheme is not invincible either. Someone smart can just crack the script and remove the validation part.

Make it attractive for users to play on your site.
For example:
Provide online Highscores.
Introduce a multiplayer option
Create friends list
Provide a server based achievement system
Develop other games and provide them on the same page so users want to come back
Create "level packs" and similar add on content and release them on your page
Overall, there are other possibilities to get users to play on your site besides technical restrictions, which - as you already found out - are difficult to deploy in an open source, browser driven environment. But, on the web, this has always been a feature, not a bug.

You're right in that a clientside-only can't be prevented from running offline. How about moving part of the game logic to the server?

You could continue to use html5 and javascript, but move your javascript to the server side using node.js For example http://www.yuiblog.com/blog/2010/09/29/video-glass-node/

If you combine obfuscation and validation, you'll go a long way. Can someone crack and use it offline? Possibly. Is it really going to be worth the effort? I mean, even an installed game can be cracked. This is especially true if you make the validation extra obfuscated by hand by spreading it out over several methods.
I would avoid moving more logic to the server than you have to, because it would obviously slow the app way down, but you might be able to get away with moving tiny crucial pieces that only happen rarely like between levels (chapters?).