How can I use JDK from ASP.NET MVC to compile and run java on remote server?

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I'm currently accessing JDK that is on my local machine. I want to be able to use it remotely(I want to have a JDK on the server, so that all users can compile and run their codes). I'm thinking of copying it from my local machine to App_Data folder in the .Net project, then right click and include it in the project. Is that correct?

What I have tried:

C#

public ActionResult Compile(string dirPath)
       {
           Process p = new Process();
           p.StartInfo.FileName = "C:/Program Files/Java/jdk1.8.0_20/bin/javac.exe";
           p.StartInfo.UseShellExecute = false;
           p.StartInfo.Arguments = "E:/Atypon/TE4/src/FileServer/Upload.java";
           p.StartInfo.RedirectStandardInput = true;
           p.StartInfo.CreateNoWindow = true;
           p.StartInfo.RedirectStandardOutput = true;
           p.StartInfo.CreateNoWindow = true;
           p.StartInfo.RedirectStandardError = true;
           p.Start();
           string result=p.StandardError.ReadToEnd();
           p.WaitForExit();
           return View(result);
       }

Posted 9-Apr-17 6:04am

Member 12992094

Updated 9-Apr-17 23:26pm

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Richard MacCutchan 9-Apr-17 12:12pm

What happens when you try it?

Member 12992094 9-Apr-17 12:16pm

It compiles correctly, but the path to the JDK is local, so users on other machines can't use it.

Richard MacCutchan 9-Apr-17 12:30pm

Why would you expect that they could?

Member 12992094 9-Apr-17 12:49pm

I have to allow them to compile their Java programs without needing to install JDK on their local machines, this is the main point of the website. JDK is a big folder, I can't upload it to the server the same way as I upload a simple txt file. So, I thought of copying it to the project directory. I'm just not sure if it will work.

Afzaal Ahmad Zeeshan 9-Apr-17 19:20pm

Then just allow them to upload a source input, and compile it on their behalf. That way, the execution will take place online, and they will get the response.

Do not allow the users to interact with binaries on your server, directly. It is totally illogical, and unsafe to allow anyone to access the content — especially the binaries — as it may expose your web application to them, and then results depend entirely on their intentions.

Member 12992094 10-Apr-17 2:19am

Yes, this is what I want to do. They will upload the files, click compile then receive a result.

But I need the JDK on my server right? How am I going to upload JDK to the server? so I was thinking, if I copy the JDK already installed on my laptop to the project directory, then access it using a virtual path, is it going to be deployed with the project on a remote server? (Azure in my case). Will users be able to compile their codes remotely?

Richard MacCutchan 10-Apr-17 3:32am

You need to follow the proper path and install the JDK somewhere on your server. Then when a web client uploads a source file you can pass it to the compiler in a separate process, capture the output, and send that back to the user.

Member 12992094 10-Apr-17 5:02am

Can you give me a hint of how to do so? I'm really new to web development, and I can't figure it out.

Richard MacCutchan 10-Apr-17 5:17am

Your question is about installing the Java Development Kit, which is a straightforward download from the Oracle website to your server. If you do not have administrative access to that server then you need to talk to the people who can provide it.

Afzaal Ahmad Zeeshan 10-Apr-17 5:27am

Please have a look at my answer below.

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Afzaal Ahmad Zeeshan · Accepted Answer · 2017-04-09T23:26:00

Now that you have mentioned the tool you are using, let me walk you through the entire process myself. The thing is, that on a cloud platform you cannot expect to run an installer, even if they let you, the virtual machine will eventually trigger and clean up the temp folders — your content is always in a virtual environment, even if you pay for a physical server.

So, how to get Java JDK on Azure? Well, you already have that... :-)

Azure provides you with all of the libraries that you require, to run an application. Python, Java, Node.js, .NET framework, all of them are supported and provided there, if you dig a bit deeper in the control panel of Azure — I am talking about the Kudu control panel, then you will be able to find that the javac (Java Compiler), and the Java JVM (java.exe) are all provided to you in the machine itself. For instance, go here,

cd D:\Program Files\Java\jdk1.8.0_73\bin

Then, if you do a dir you will see the list of binaries. They contain everything you need to compile the Java code, or run the Java code to show the output.

You would require to access the runtime information, such as environment variables, to determine where these binaries are provided and then target them from within the application.

Your control panel can be easily found at, <your-web-app-name>.scm.azurewebsites.net. You can then go to the Debug console, and roam around your service.

For resources, directly related with Java development on Azure, or the available tools and services, please review the Java developer center | Microsoft Azure[^] documentation.

How can I use JDK from ASP.NET MVC to compile and run java on remote server?

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