playlist.js

var crypto = require('crypto');
var http = require('http');
var https = require('https');

function sha1(s) {
	var shasum = crypto.createHash('sha1');
	shasum.update(s);
	return shasum.digest('hex');
}

var sharedKey = {
   Samsung : 'aeaKuegnnadnau',
   Android : 'eKoShKddidoeAn',
   DotCom : '',
   Mobile : '',
   YouView : '',
   Freesat : '',
   PS3 : ''
}

function generate_hmac_token(productionId, platform) {
	console.log(platform);
	console.log(productionId);
	var prodId = productionId.split('_').join('/').split('.').join('#');
	console.log(prodId);
	var salt = sharedKey[platform];
	if (!salt) salt = '';
	console.log('salt:'+salt);
	var saltedHash = salt + prodId;
	return sha1(saltedHash).toUpperCase();
}

if (process.argv.length > 3) {

	var platform = process.argv[2];
	var prodId = process.argv[3];

	var options = {};
	options.headers = {};
	options.headers.hmac = generate_hmac_token(prodId, platform);
	options.headers['Content-Type'] = 'application/json';

	prodId = prodId.split('/').join('_').split('#').join('.');
	options.path = '/playlist/itvonline/'+(platform.toLowerCase())+'/'+prodId;
	options.host = 'old-origin-api.itv.com';

	console.log(options.headers.hmac);

	https.get(options,function(res){
		var data = '';
		res.on('data',function(chunk){
			data += chunk;
		});
		res.on('error',function(err){
		});
		res.on('end',function(){
			console.log(res.statusCode+' '+res.statusMessage);
			console.log(JSON.stringify(res.headers,null,2));
			if (data) {
				try {
					var obj = JSON.parse(data);
					console.log(JSON.stringify(obj,null,2));
					console.log();
					if (obj.Playlist) {
						console.log(obj.Playlist.Video.Base+obj.Playlist.Video.MediaFiles[0].Href);
						console.log();
						console.log('ffmpeg -protocol_whitelist crypto -i {infile] {outfile}');
					}
				}
				catch (ex) {
					console.log(ex.message);
					console.log(data);
				}
			}

		});
	});

}
else {
	console.log('Usage: playlist {platform} {productionId}');
	console.log('e.g. : playlist Samsung 1_9855_0061.001');
	console.log('or   : playlist Samsung 1/9855/0061#001');
	console.log('or   : playlist Android {channel}');
}