deepak1556/child.js Secret

## child.js
const net = require('net');
let counter = 0;
const pipename = '\\\\.\\pipe\\testpipe';
process.send('Child process created');

const errCb = () => {
   process.send('Error creating named pipe client');
};

const socket = net.createConnection(pipename, () => {
   socket.removeListener('error', errCb);
   registerSocket();
});

socket.once('error', errCb);

socket.on('close', () => {
   process.send('renderer closed the socket.');
});

function registerSocket() {
   process.send("Connected to named pipe as client");
   socket.on('data', (data) => {
      process.send(`rec'd from server: ${data}`);
      setTimeout(function() {
         socket.write(`ping ${counter++}`);
      }, 1000);
   });
}

## index.html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>Hello One!</title>
  </head>
  <body>
    <h1>Hello World!</h1>
    <!-- You can also require other files to run in this process -->
    <script src="./renderer.js"></script>
  </body>
</html>

## main.js
// Modules to control application life and create native browser window
const {app, BrowserWindow} = require('electron')
const path = require('path')
const { fork } = require('child_process')
let child = null;

function createWindow () {
  // Create the browser window.
  const mainWindow = new BrowserWindow({
    width: 800,
    height: 600,
    webPreferences: {
      nodeIntegration: true,
      sandbox: false,
      contextIsolation: false
    }
  })

  // and load the index.html of the app.
  mainWindow.loadFile('index.html')

  mainWindow.webContents.on('did-start-loading', () => {
    console.log('Renderer will start navigating');
    if (child) {
      console.log('Kill forked process');
      child.kill('SIGKILL');
      child = null;
    }
  })

  mainWindow.on('close', () => {
    console.log('App exiting');
    if (child) {
      console.log('Kill forked process');
      child.kill('SIGKILL');
      child = null;
    }
  })

  mainWindow.webContents.on('did-finish-load', () => {
    console.log('Renderer finished loading');
    if (!child) {
      child = fork(`${__dirname}/child.js`, { execArgv: ['--inspect=5870']})
      child.on('message', (msg) => {
        console.log(`Forked process: ${msg}`)
      })
      child.on('close', () => {
        console.log('forked process exited')
      })
    }
  })
}

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.whenReady().then(() => {
  createWindow()

  app.on('activate', function () {
    // On macOS it's common to re-create a window in the app when the
    // dock icon is clicked and there are no other windows open.
    if (BrowserWindow.getAllWindows().length === 0) createWindow()
  })
})

// Quit when all windows are closed, except on macOS. There, it's common
// for applications and their menu bar to stay active until the user quits
// explicitly with Cmd + Q.
app.on('window-all-closed', function () {
  if (process.platform !== 'darwin') app.quit()
})

## renderer.js
// This file is required by the index.html file and will
// be executed in the renderer process for that window.
// No Node.js APIs are available in this process because
// `nodeIntegration` is turned off. Use `preload.js` to
// selectively enable features needed in the rendering
// process.

const net = require('net');
let counter = 0;
const pipename = '\\\\.\\pipe\\testpipe';
let serverSocket = null;
let namedPipeServer = net.createServer();
const errCb = () => {
    console.log('Error creating named pipe server');
};

namedPipeServer.on('error', errCb);
namedPipeServer.listen(pipename, () => {
    if (namedPipeServer) {
        namedPipeServer.removeListener('error', errCb);
    }
})


let handle = setTimeout(() => {
    if (namedPipeServer) {
        namedPipeServer.close();
        namedPipeServer = null;
    }
    console.log('Client took more than 60s to connect.');
}, 60 * 1000);

if (namedPipeServer) {
    namedPipeServer.on('connection', (socket) => {
        console.log("Connected to named pipe as server");
        clearTimeout(handle);
        if (namedPipeServer) {
            namedPipeServer.close();
            namedPipeServer = null;
        }
        serverSocket = socket;
        registerSocket(serverSocket);
    });
}

function registerSocket(socket) {
    socket.on('data', (data) => {
        console.log(`rec'd from client: ${data}`);
        setTimeout(function() {
            socket.write(`pong ${counter++}`);
        }, 1000);
    });
    socket.write('pong!');
}
	const net = require('net');
	let counter = 0;
	const pipename = '\\\\.\\pipe\\testpipe';
	process.send('Child process created');

	const errCb = () => {
	process.send('Error creating named pipe client');
	};

	const socket = net.createConnection(pipename, () => {
	socket.removeListener('error', errCb);
	registerSocket();
	});

	socket.once('error', errCb);

	socket.on('close', () => {
	process.send('renderer closed the socket.');
	});

	function registerSocket() {
	process.send("Connected to named pipe as client");
	socket.on('data', (data) => {
	process.send(`rec'd from server: ${data}`);
	setTimeout(function() {
	socket.write(`ping ${counter++}`);
	}, 1000);
	});
	}
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8">
	<title>Hello One!</title>
	</head>
	<body>
	<h1>Hello World!</h1>
	<!-- You can also require other files to run in this process -->
	<script src="./renderer.js"></script>
	</body>
	</html>
	// Modules to control application life and create native browser window
	const {app, BrowserWindow} = require('electron')
	const path = require('path')
	const { fork } = require('child_process')
	let child = null;

	function createWindow () {
	// Create the browser window.
	const mainWindow = new BrowserWindow({
	width: 800,
	height: 600,
	webPreferences: {
	nodeIntegration: true,
	sandbox: false,
	contextIsolation: false
	}
	})

	// and load the index.html of the app.
	mainWindow.loadFile('index.html')

	mainWindow.webContents.on('did-start-loading', () => {
	console.log('Renderer will start navigating');
	if (child) {
	console.log('Kill forked process');
	child.kill('SIGKILL');
	child = null;
	}
	})

	mainWindow.on('close', () => {
	console.log('App exiting');
	if (child) {
	console.log('Kill forked process');
	child.kill('SIGKILL');
	child = null;
	}
	})

	mainWindow.webContents.on('did-finish-load', () => {
	console.log('Renderer finished loading');
	if (!child) {
	child = fork(`${__dirname}/child.js`, { execArgv: ['--inspect=5870']})
	child.on('message', (msg) => {
	console.log(`Forked process: ${msg}`)
	})
	child.on('close', () => {
	console.log('forked process exited')
	})
	}
	})
	}

	// This method will be called when Electron has finished
	// initialization and is ready to create browser windows.
	// Some APIs can only be used after this event occurs.
	app.whenReady().then(() => {
	createWindow()

	app.on('activate', function () {
	// On macOS it's common to re-create a window in the app when the
	// dock icon is clicked and there are no other windows open.
	if (BrowserWindow.getAllWindows().length === 0) createWindow()
	})
	})

	// Quit when all windows are closed, except on macOS. There, it's common
	// for applications and their menu bar to stay active until the user quits
	// explicitly with Cmd + Q.
	app.on('window-all-closed', function () {
	if (process.platform !== 'darwin') app.quit()
	})
	// This file is required by the index.html file and will
	// be executed in the renderer process for that window.
	// No Node.js APIs are available in this process because
	// `nodeIntegration` is turned off. Use `preload.js` to
	// selectively enable features needed in the rendering
	// process.

	const net = require('net');
	let counter = 0;
	const pipename = '\\\\.\\pipe\\testpipe';
	let serverSocket = null;
	let namedPipeServer = net.createServer();
	const errCb = () => {
	console.log('Error creating named pipe server');
	};

	namedPipeServer.on('error', errCb);
	namedPipeServer.listen(pipename, () => {
	if (namedPipeServer) {
	namedPipeServer.removeListener('error', errCb);
	}
	})


	let handle = setTimeout(() => {
	if (namedPipeServer) {
	namedPipeServer.close();
	namedPipeServer = null;
	}
	console.log('Client took more than 60s to connect.');
	}, 60 * 1000);

	if (namedPipeServer) {
	namedPipeServer.on('connection', (socket) => {
	console.log("Connected to named pipe as server");
	clearTimeout(handle);
	if (namedPipeServer) {
	namedPipeServer.close();
	namedPipeServer = null;
	}
	serverSocket = socket;
	registerSocket(serverSocket);
	});
	}

	function registerSocket(socket) {
	socket.on('data', (data) => {
	console.log(`rec'd from client: ${data}`);
	setTimeout(function() {
	socket.write(`pong ${counter++}`);
	}, 1000);
	});
	socket.write('pong!');
	}