Api.prototype.execute = function(url, method, args, do_something_with_chunk) {
    if (url && method) {
        basicAuth = new Buffer(this._user+':'+this._apiKey).toString('base64');
        var http = require('http');
        var api = http.createClient(80, this._host);
        var request = api.request(method, this._url+url,
            { 'host': this._host, 'authorization': 'Basic '+basicAuth });
        request.end();
        request.on('response', function (response) {
            response.setEncoding('utf8');
            response.on('data', function (chunk) {
                do_something_with_chunk(chunk);
            });
        });
    } else {
        return false;
    }
}