johnschimmel/server_querystring.js

## server_querystring.js
/************************************************
FILENAME
server_querystring.js

DESCRIPTION
creates a web server that
display "Hello Dynamic World Wide Web"
it includes a web form to accept a new name from the user via the querystring and displays it.
the new name will be stored in a local variable 'defaultName'.

HOW TO START SERVER:
1) from terminal run 'node server_querystring.js'
2) open web browser visit http://127.0.0.1:8080

*************************************************/

// Include the HTTP Node library
// http://nodejs.org/docs/latest/api/http.html
var http = require('http');
var url = require("url");

// define the
var localIP = "127.0.0.1"; // 127.0.0.1 is used when
var port = 8080;

var defaultName = "Dynamic World Wide Web";

var server = http.createServer(function (req, res) {

    // Print to terminal that server has been requested
    console.log("We've got a request on " + req.url);

    /********************************************/
    /*  GET DATA FROM THE URL'S QUERYSTRING     */
    /********************************************/
    // Get the request url
    var urlObj = url.parse(req.url, true);

    // Just for debugging - print out any querystring variables
    for(q in urlObj['query']) {
            console.log( q + " = " + urlObj['query'][q]);
    }

    // update the variable defaultName if new name is passed from querystring
    if (urlObj['query']['thename'] != undefined) {

        console.log("updating 'defaultName' variable to " + urlObj['query']['thename']);

        defaultName = urlObj['query']['thename']; // take the name from the URL querystring i.e. ?thename=tony
    }

    /************************************/
    /*  START HTTP RESPONSE TO BROWSER  */
    /************************************/

    // prepare HTTP response header
    res.writeHead(200, {'Content-Type': 'text/html'});

    // HTTP response body
    res.write('<html>\n<body>\n');
    res.write('<h1>Hello ' + defaultName + '<h1>\n');
    res.write('<form method="GET">\n<input type="text" placeholder="type a name" name="thename">\n<input type="submit" value="submit new name">\n</form>\n');
    res.write('</body>\n</html>');

    // HTTP response finished
    res.end();

});

server.listen(port, localIP);

// print message to terminal that server is running
console.log('Server running at http://'+ localIP +':'+ port +'/');
	/************************************************
	FILENAME
	server_querystring.js

	DESCRIPTION
	creates a web server that
	display "Hello Dynamic World Wide Web"
	it includes a web form to accept a new name from the user via the querystring and displays it.
	the new name will be stored in a local variable 'defaultName'.

	HOW TO START SERVER:
	1) from terminal run 'node server_querystring.js'
	2) open web browser visit http://127.0.0.1:8080

	*************************************************/

	// Include the HTTP Node library
	// http://nodejs.org/docs/latest/api/http.html
	var http = require('http');
	var url = require("url");

	// define the
	var localIP = "127.0.0.1"; // 127.0.0.1 is used when
	var port = 8080;

	var defaultName = "Dynamic World Wide Web";

	var server = http.createServer(function (req, res) {

	// Print to terminal that server has been requested
	console.log("We've got a request on " + req.url);

	/********************************************/
	/* GET DATA FROM THE URL'S QUERYSTRING */
	/********************************************/
	// Get the request url
	var urlObj = url.parse(req.url, true);

	// Just for debugging - print out any querystring variables
	for(q in urlObj['query']) {
	console.log( q + " = " + urlObj['query'][q]);
	}

	// update the variable defaultName if new name is passed from querystring
	if (urlObj['query']['thename'] != undefined) {

	console.log("updating 'defaultName' variable to " + urlObj['query']['thename']);

	defaultName = urlObj['query']['thename']; // take the name from the URL querystring i.e. ?thename=tony
	}

	/************************************/
	/* START HTTP RESPONSE TO BROWSER */
	/************************************/

	// prepare HTTP response header
	res.writeHead(200, {'Content-Type': 'text/html'});

	// HTTP response body
	res.write('<html>\n<body>\n');
	res.write('<h1>Hello ' + defaultName + '<h1>\n');
	res.write('<form method="GET">\n<input type="text" placeholder="type a name" name="thename">\n<input type="submit" value="submit new name">\n</form>\n');
	res.write('</body>\n</html>');

	// HTTP response finished
	res.end();

	});

	server.listen(port, localIP);

	// print message to terminal that server is running
	console.log('Server running at http://'+ localIP +':'+ port +'/');