Filtering paths and creating html page in express.js

Express JSServer Side ProgrammingProgramming

We added express router to handle routes. One single router file handles multiple routes.

Adding a path for router in App.js 

const http = require('http');
const express = require('express');
const bodyParser = require('body-parser');
const route = require('./routes');
const app = express();
app.use(bodyParser.urlencoded({extended: false}));
app.use('/test',route);
app.use((req, res,next)=>{
   res.status(404).send('<h1> Page not found </h1>');
});
const server = http.createServer(app);
server.listen(3000);

In router middleware we used path −/p>

app.use('/test',route);

Router will handle all paths starting with /test e.g. /test/add-username

We have to change action in form in routes.js file −

router.get('/add-username', (req, res,next)=>{
   res.send('<form action="/test/post-username" method="POST"> <input type="text" name="username">     <button type="submit"> Send </button> </form>');
});

Routes.js file −

const express = require('express');
const router = express.Router();
router.get('/add-username', (req, res,next)=>{
   res.send('<form action="/test/post-username" method="POST"> <input type="text" name="username">     <button type="submit"> Send </button> </form>');
});
router.post('/post-username', (req, res, next)=>{
   console.log('data: ', req.body.username);
   res.send('<h1>'+req.body.username+'</h1>');
});
module.exports = router;

This mechanism of adding filtering for router helps in putting common urls handler in one section.

Creating html5 page in vs code editor

Create a new folder for storing html pages , let’s say views folder. Create a new file add-user.html.

In add-user.html file, if we type html and hit ctrl + space we will get an options for creating a default skeleton for html5. Select it and we will have below html5 page −

<!DOCTYPE html>
<html lang="en">
   <head>
      <meta charset="UTF-8">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <title>Document</title>
   </head>
<body>
</body>
</html>

We can copy the form from route.js file here in html body.

<form action="/test/post-username" method="POST"> <input type="text" name="username"> <button type="submit"> Send </button> </form>
raja
Published on 13-May-2020 17:01:42
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