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digitalocean.com

https://www.digitalocean.com/community/tutorials/how-to-install-express-a-node-js-framework-and-set-up-socket-io-on-a-vps

Step 1: Setting up NodeJS Step 1: Setting up NodeJS Note: You may skip this step if you already know you have NodeJS installed v0.10.16 Node Version Manager (NVM) is a tool to help install various versions of NodeJS on your linux machine. In order to use NVM ensure you have git and curl installed. Connect to your VPS (droplet) using SSH. If you do not have these installed, use your system’s package manager to install them. For example, on an Ubuntu or Debian install you would run: ``` sudo apt-get install curl git ``` Now you must run the NVM install script: curl https://raw.github.com/creationix/nvm/master/install.sh | sh IMPORTANT: You must now logout of your box and reconnect using SSH. Test to make sure the nvm command works by typing nvm at the terminal. If you do not get a command not found error, then you have correctly setup NVM. To install the latest version of Node (which is 0.10.16 at the time of this article), simply type: nvm install 0.10.16 Then wait for the installation to complete. If the install was successful, you should get an output reading: Now using node v0.10.16. Type node -v at the terminal to ensure you are using the specified version. You should get the output: v0.10.16Step 2: Setting Up Express Step 2: Setting Up Express Express is a web application framework for Node. It is minimal and flexible. In order to start using Express, you need to use NPM to install the module. Simple type: npm install -g express This will install the Express command line tool, which will aid in creating a basic web application. Once you have Express installed, follow these steps to create an empty Express project: mkdir socketio-test cd socketio-test express npm install These commands will create an empty Express project in the directory we just created socketio-test. We then run npm install to get all the dependencies that are needed to run the app. To test the empty application, run node app then navigate your browser to . You should get a simple welcome message saying: “Welcome to Express”. If you see the welcome message then you have a basic express application ready and running! Be sure to kill your VPS with the Ctrl+C keyboard command before you keep going.Step 3: Installing Socket.io Into Your Express Application Step 3: Installing Into Your Express Application First, a quick summary of what is. is a real-time JavaScript library. In short, it’s a WebSocket API that will determine the correct type of connection to make depending on the browser’s capabilities, whether it be AJAX Long Polling, Flash, or even just plain WebSockets. So how do you get started with this? First you need a server. We already have an Express server ready and waiting, all we need to do is add on the socket library. To do that we have to add it to the package.json file. Your initial file might look something like this: { "name": "application-name", "version": "0.0.1", "private": true, "scripts": { "start": "node app.js" }, "dependencies": { "express": "3.3.5", "jade": "*" } } Now add a new field to the “dependencies” area: "socket.io": "latest", Your resulting file should look something like this: { "name": "application-name", "version": "0.0.1", "private": true, "scripts": { "start": "node app.js" }, "dependencies": { "socket.io": "latest", "express": "3.3.5", "jade": "*" } } Now run npm install once more to install the socket library.Part 4: The Server Code Part 4: The Server Code Now that we have all the dependencies set up, we can start the code! Go and open up the app.js file in the Express application folder. Inside you’ll a bunch of auto-generated code, delete all of it and use the following example instead: /** * Module dependencies. */ var express = require('express') , routes = require('./routes') , http = require('http'); var app = express(); var server = app.listen(3000); var io = require('socket.io').listen(server); // this tells socket.io to use our express server app.configure(function(){ app.set('views', __dirname + '/views'); app.set('view engine', 'jade'); app.use(express.favicon()); app.use(express.logger('dev')); app.use(express.static(__dirname + '/public')); app.use(express.bodyParser()); app.use(express.methodOverride()); app.use(app.router); }); app.configure('development', function(){ app.use(express.errorHandler()); }); app.get('/', routes.index); console.log("Express server listening on port 3000"); All this example file has done has reorganized the auto-generated code and added the var io = require('socket.io').listen(server); line which tells to listen on and use our Express server. If you run your node app you should see it output: info - socket.io started. Now how do we transport a message to the user? Add the following lines to your app.js just below the last line. io.sockets.on('connection', function (socket) { console.log('A new user connected!'); socket.emit('info', { msg: 'The world is round, there is no up or down.' }); }); This will send out a new socket message whenever a new user connects to the server. Now we just need a way to interact with the VPS on the client side.Part 5: The Client Side Code Part 5: The Client Side Code Naviagate to the public/javascripts folder inside your Express application and add a new file called client.js and put this code into it: // connect to the socket server var socket = io.connect(); // if we get an "info" emit from the socket server then console.log the data we recive socket.on('info', function (data) { console.log(data); }); The code is simple but it demonstrates what you can do with . Now we just need to include the scripts into our main page. Navigate to your views folder in the Express app and open layout.jade. Express does not use plain HTML to render its pages. It uses a templating engine called Jade. (More information about Jade can be found ) Jade is simple and clean compared to plain HTML. To add our client script and add the client library we simple need to add these to lines just below the link(rel='stylesheet', href='/stylesheets/style.css'): script(type='text/javascript', src="/socket.io/socket.io.js") script(type='text/javascript', src='javascripts/client.js') Make sure they line up on the same indent level and do NOT mix tabs and spaces. This will cause Jade to throw an error. Switch back into the socketio-test directory: cd socketio-test Save the layout file and start your Express app once again using: node app.Part 6: Testing It Part 6: Testing It

nail express

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expressjs.com

http://expressjs.com/en/starter/installing.html

To install Express temporarily and not add it to the dependencies list: $ npm install express --no-save By default with version npm 5.0+ npm install adds the module to the dependencies list in the package.json file; with earlier versions of npm, you must specify the --save option explicitly. nail express

nail express

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robinwieruch.de

https://www.robinwieruch.de/node-js-express-tutorial/

Apr 23, 2020 . Let's continue by installing Express.js in your Node.js application from before on the command line: npm install express Now, in your src/index.js JavaScript file, use the following code to import Express.js, to create an instance of an Express application, and to start it as Express server: nail express

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github.io

https://mtyiu.github.io/csci4140-spring15/tutorials/5/install-nodejs-on-windows.pdf

Step 1: Download the Windows installer. •Download the latest version of Node.js from http://nodejs.org/download/ •Most of you should be using 64-bit machine already . 2015.02.12 3. Prepared by Matt YIU, Man Tung CSCI 4140 – Installing Node.js and Express on WindowsTutorial 5. Step 2: Install Node.js. File Size: 2MB Page Count: 21 nail express

File Size: 2MB

Page Count: 21

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twilio.com

https://www.twilio.com/docs/usage/tutorials/how-to-set-up-your-node-js-and-express-development-environment

Dec 02, 2021 . Node.js uses npm to manage dependencies, so the command to install Express and the Twilio SDK to our development environment is npm install express twilio. Installing these packages tells npm to add the Express and Twilio packages to the dependencies object in our project's package.json file. nail express

nail express

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digitalocean.com

https://www.digitalocean.com/community/tutorials/nodejs-express-basics

May 04, 2018 . Next, you will need to install the express package: npm install express @4.17.1; At this point, you have a new project ready to use Express. Step 2 — Creating an Express Server. Now that Express is installed, create a new server.js file and open it with your code editor. Then, add the following lines of code: nail express

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stackoverflow.com

https://stackoverflow.com/questions/11663590/issues-with-installing-express-js-in-windows-7

Jul 26, 2012 . Just want to add the following: instead of first installing it globally using: npm install express -g. And then moving it, like the accepted answer says (which is just silly), just simply install it within node js: npm install express -g … nail express

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bezkoder.com

https://www.bezkoder.com/node-js-express-download-file/

Jun 05, 2021 . In this tutorial, we’re gonna create Node.js Express example that provides Rest API to download file to Client from url (on server). This Node.js server works with: – Angular 8 Client / Angular 10 Client / Angular 11 Client / Angular 12. – Vue Client / Vuetify Client. – React Client / React Hooks Client. – React Material UI Client. nail express

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mozilla.org

https://developer.mozilla.org/en-US/docs/Learn/Server-side/Express_Nodejs/deployment

Previous ; Overview: Express Nodejs; Now you've created (and tested) an awesome LocalLibrary website, you're going to want to install it on a public web server so that it can be accessed by library staff and members over the Internet. This article provides an overview of how you might go about finding a host to deploy your website, and what you need to do in order to get your site … nail express

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stackoverflow.com

https://stackoverflow.com/questions/12231846/npm-will-not-install-express

Sep 02, 2012 . This answer is not useful. Show activity on this post. The solution is: 1 - chown to your user the .npm folder : sudo chown -R Webmaste /Users/webmaste/.npm/. 2 - At your test folder or your folder: sudo npm install -g [email protected]. 3 - Invoke express from your actual location: /usr/local/share/npm/bin/express. nail express

nail express

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hackernoon.com

https://hackernoon.com/set-up-ssl-in-nodejs-and-express-using-openssl-f2529eab5bb

Jan 15, 2019 . Instead, it contains only 4 files which are package.json, key.pem, cert.pem and server.js. So, create a new directory node-https, cd node-https and run npm init -y to create package.json file. Now install express using npm i --save express. Create a server.js file and type the following code in it. Our server.js should look like this: nail express

nail express

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stackfame.com

https://stackfame.com/downloading-files-from-server-express

Sep 23, 2017 . Assuming You have installed Nodejs and express.js on your pc. We will use. res.download. res.download. function of express.js. it will send the file to requesting client automatically and you can see the code below. var express = require('express'); var app= express(); //your http requests. nail express

nail express

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tutorialspoint.com

https://www.tutorialspoint.com/nodejs/nodejs_express_framework.htm

Installing Express Firstly, install the Express framework globally using NPM so that it can be used to create a web application using node terminal. $ npm install express --save The above command saves the installation locally in the node_modules directory and creates a directory express inside node_modules. nail express

nail express

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tutorialkart.com

https://www.tutorialkart.com/nodejs/install-express-js/

To install express.js using npm, run the following command. npm install express To install it globally, run the above command with -g option. g for global. npm install -g express Once express.js is installed, you can import express.js into your node project using require statement. var express = require ('express') nail express

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tutorialsteacher.com

https://www.tutorialsteacher.com/nodejs/expressjs

You can install express.js using npm. The following command will install latest version of express.js globally on your machine so that every Node.js application on your machine can use it. npm install -g express The following command will install latest version of express.js local to your project folder. C:\MyNodeJSApp> npm install express --save nail express

nail express

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expressjs.com

https://expressjs.com/ja/starter/installing.html

Express を一時的にインストールし、それを依存関係リストに追加しないようにするには、次のようにします。 $ npm install express --no-save npm 5.0 以降のデフォルトでは、npm install はモジュールを package.json ファイルの dependencies リストに追加します。 nail express

nail express

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javatpoint.com

https://www.javatpoint.com/install-expressjs

Use the following command to install express: npm install express --save. npm install express --save. The above command install express in node_module directory and create a directory named express inside the node_module. You should install some other important modules along with express. Following is the list: nail express

nail express

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geeksforgeeks.org

https://www.geeksforgeeks.org/node-js-gm-thumbnail-function/

Oct 11, 2021 . The thumbnail() function is an inbuilt function in the GraphicsMagick library which is used to make the thumbnail image of the given image. The function returns the true value on success. Syntax: thumbnail( x, y ) Parameters: This function accepts two parameters as mentioned above and described below: x: This parameter is used to specify width of the …

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coderwall.com

https://coderwall.com/p/mbov6w/running-nodejs-and-express-on-windows

Dec 26, 2021 . Download and run nodejs installer from nodejs.org. Run cmd.exe: Press Windows+R on a keyboard. Type "cmd" without quotes and press enter. Check if node is installed successfuly by typing "node -v" without quotes, it should respond with "v#.#.#" where # stands for number. Restart computer if "node -v" does not respond correctly. nail express

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