Example of image resizing

gistfile1.js

module.exports = {
   
	index: function(req,res){
		var name = req.params.name;
		var sub = name.split('.'),fname = sub[sub.length-2],ext = sub[sub.length-1];
		var imgpath = __dirname+'/../../assets/img/'+fname+'.'+ext;
		require('fs').exists(imgpath, function(exist){
			if(exist){
				var Canvas  = require('canvas'),
					Image = Canvas.Image,
					img = new Image;
				img.onerror =  function(err){
					throw err;
				};
				img.onload = function(){
					var width = parseInt(req.params.x);
					var height = parseInt(req.params.y);
					if(width > 2048){
						width = 2048;
					}
					if(height > 2048){
						height = 2048;
					}
					var canvas = new Canvas(width, height);
					var ctx = canvas.getContext('2d');

					ctx.imageSmoothingEnabled = false;
					ctx.drawImage(img, 0, 0, width, height);
					canvas.toBuffer(function(err,buf){
						if(err){
							console.log(err);
							res.status(500);
							res.end();
						}else{
							res.status(200);
							res.end(buf,'binary');
						}
					});
				};
				img.src = imgpath;
			}else{
				res.status(404);
				res.end();
			}
		});
	},
	_config: {}

  
};