Freitag, 19. August 2016

node.js: create a little bit more complex webserver

In the last tutorial, we have created a simple webserver. Lets create a little bit more complex webserver with node.js, which can serv different filetypes and check for errors on the filesystem.

Prerequisits

node.js installed
npm installed

Create a webserver

This webserver can dispatch a hand full of images , text, javascript and css

Create a file "server.js" and paste following code

	const http = require('http');
	const url = require('url');
	const path = require('path');
	const fs = require('fs');


	const mimeTypes =
	{
	"html":"text/html",
	"jpg":"image/jpg",
	"jpeg":"image/jpeg",
	"png":"image/png",
	"css":"text/css",
	"javascript":"text/javascript"
	}


	http.createServer(function(req, res){


	var uri = url.parse(req.url).pathname;
	console.log(uri);


	var fileName = path.join(process.cwd(), unescape(uri));

	console.log('Loading' + uri);
	var stats;

	try
	{
	stats = fs.lstatSync(fileName);
	}
	catch(e)
	{
	res.writeHead(404,{'Content-Type':'text/plain'});
	res.write('404 Not found\n');
	res.end();
	return;
	}

	if(stats.isFile())
	{
	var mimeType = mimeTypes[path.extname(fileName).split(".").reverse()[0]];
	res.writeHead(200,{'Content-type': mimeType});
	var fileStream = fs.createReadStream(fileName);
	fileStream.pipe(res);

	}else if(stats.isDirectory())
	{
	res.writeHead(302,{'location':'index.html'});
	}else
	{
	res.writeHead(500, {'Content-type':'text/plain'});
	res.write('500 internal Error\n');
	res.end;
	}


	}).listen(1337);

view raw server hosted with ❤ by GitHub

This will create the webserver

Create a file to dispatch

Open a terminal in the projectroot and create a file "index.html" with following content

<html>

<head></head>

<body>

<h1>Testing</h1>

</body>

</html>

view raw index.html hosted with ❤ by GitHub

Start the webserver

Open a terminal in the projectroot and type:
$ node server.js

Now you can surf http://localhost:1337/index.html and you should see "Testing"

Thats it

webtexx

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