function HttpService(tokenService){
	this.tokenService = tokenService; 
}
HttpService.createInstance = function(tokenService){
	var tokenService = tokenService || new TokenService();
	return new HttpService(tokenService);
}
HttpService.prototype = {
		_send : function(cfg){
			var self = this;
			return new Promise(function(resolve,reject){
				cfg.beforeSend = function(request) {
					if ( self.tokenService.hasToken() ) {
						var token = self.tokenService.getToken();
						request.setRequestHeader("x-access-token", token);
					}
				};
				$.ajax(cfg).fail(reject).done(resolve);
			})
		},
		get : function(url,dataType){
			return this._send({
				dataType: dataType || 'json',  
				contentType: 'application/json',
				url: url,  
				type: 'GET',  
			});
		},
		delete : function(url){
			return this._send({
				dataType: 'json',  
				url: url,  
				type: 'DELETE',  
			});
		},
		post : function(url,dados){
			return this._send({
				dataType: 'json',  
				contentType: 'application/json',  
				url: url,  
				type: 'POST', 
				data:JSON.stringify(dados),
			});
		},
		put : function(url,dados){
			return this._send({
				dataType: 'json',  
				url: url,  
				type: 'PUT', 
				data:JSON.stringify(dados),
			});
		}
};