如何使用AJAX读取实时流数据

I want to read live streaming data from my URL(ie.https://..) My URL(ie.https://..) contain numeric data and it's continuously growing. i want to read that data in to my file(HTML5 & javascript). I have done with static numeric data using AJAX. But while duing it with dynamic data(live streaming data). i am not able to get responseText(). Is it possible to take responseText() of that URL(ie.https://..) which contain live streaming data? how i can do this? My code for reading static data is I want to read live streaming data from my URL(