node js file remove from s3

    var knox = require('knox');
    var client = knox.createClient({
        key: '<api key>'
        , secret: '<s3 secrect>'
        , bucket: 'tests'
    });
 
    var a = "https://s3.amazonaws.com/tests/53f1c7233f3712014-08-06-1024.png"
    var image = a.substr(32);
    client.del(String(image)).on('response', function(res){
        console.log(res.statusCode);
        console.log(res.headers);
    }).end();