???? ?????? HTML ????? ??? ????

??:

Flask ??, ???? HTML ??? ???? ????? ???. template.

??:

Flask ?? ??? ??? ????? ????? ?????? ???? ?? ?????? ?? ??????. ??? ??? ???? JavaScript? ?? ??? ?????.

XMLHttpRequest ??:

1. XMLHttpRequest ??? ???? ??????? ???? ???? ?????.
2. ??? ?????. ????(?: setInterval)? ???? ? ???? ?????.
3. ? ???? ???? HTML? ?? ???? ?????(?: DOM ?? ??).
4. ???? ?? ??? ?? ???? ?????(?? ?? ??? ??).

# Server-side Flask code
@app.route("/stream")
def stream():
    def generate():
        for i in range(500):
            yield "{}\n".format(sqrt(i))
            sleep(1)

    return app.response_class(generate(), mimetype="text/plain")

# Client-side JavaScript
var timer = setInterval(function() {
    // Handle new data
    if (xhr.readyState == XMLHttpRequest.DONE) { clearInterval(timer); }
}, 1000);