Mittwoch, 18. Mai, 2016

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Delving into Node.js and Express web framework 32 1 var port = 1337; 2 var express = require('express'); 3 var app = express(); 4 5 app.use('/', function(req, res) { 6 res.send('Howdy World'); 7 }); 8 9 app.listen(port); 10 11 console.log('Server running at http://localhost:' + port); First, we require the Express module and create a new Express application object. Then, we use the app.use() method to bind a middleware function with a specific path, and we use the app.listen() method to tell the Express application to listen on the port 1337. The app.use() method’s second parameter is an anonymous (middleware) function which accepts parameters req and res, which then uses the res.send() method to send the response back. The res.send() method is basically an Express wrapper that sets the Content-Type header according to the response object type and then sends a response back using the Connect’s res.end() method. MVC So, for some long time now the state of the best web development practices is like this: and you just may be like this: MVC
Delving into Node.js and Express web framework 33 MVClady Don’t despair, we’re going to demistify this. The Express framework in itself doesn’t require any specific pattern or syntax or structure as do some other web frameworks. Applying the MVC pattern to our Express application means that we can create specific folders where we place our JavaScript files in a certain logical order. All those files are basically CommonJS modules that function as logical units. Sooner or later you’ll find yourself wondering how you should arrange your project files and break them into logical units of code. Horizontal project structure is the structure that we will use, and it is based on the division of folders and files by their functional role rather than by the feature they implement, which means that all the application files are placed inside a main application folder that contains an MVC folder structure. A vertical project structure is based on the division of folders and files by the feature that they implement, which means that each feature has its own folder that contains an MVC folder structure. This is how our app folder structure will look like:
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Mittwoch, 18. Mai, 2016

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