Can flask framework send real-time data from server to client browser?
I was wondering how (if at all) flask performs long polling, so the server can send data over a connection to the client. For example if the server receives a twitter feed via the streaming api how will that be passed to the client browser?
I gather that you cannot use flask.flash for such a situation.
Thanks
Thanks for the examples. I looked at the examples and when I try to implement it for my code, it still does not provide a real-time output in the client browser.
I have based it around the flask snippet() using juggernaut and redis. This is my python code:
import flask
from flask.views import MethodView
from tweetStreamsRT import StreamerRt
from juggernaut import Juggernaut
app = flask.Flask(__name__)
app.secret_key = "xxxxx"
PORT = 8080
class View(MethodView):
def get(self):
return flask.render_template('index.html')
def post(self):
results = StreamerRt().filter(track=[flask.request.form['event']])
jug = Juggernaut()
jug.publish('channel', results)
return self.get()
app.add_url_rule('/', view_func = View.as_view('index'), methods=['GET', 'POST'])
app.debug = True
if __name__ == "__main__":
print 'Listening on http://localhost:%s' % PORT
app.run()
My html page is, which inherits from a base html page:
{% extends "base.html" %}
{% import "forms.html" as forms %}
{% block page_header %}
<div class="page-header">
<h1>Welcome</h1>
</div>
{% endblock %}
{% block content %}
<h2>Enter the Event you would like to follow</h2>
<form action="/" method="post">
<input type="text" name="event" />
<input type="submit" value="Submit Query" />
</form>
Results:
<pre>
<script type="text/javascript" charset="utf-8">
var jug = new Juggernaut;
jug.subscribe("channel", function(data){
alert("Got data: " + data);});
</script>
</pre>
{% endblock %}
I'm still confused as to why nothing is sent to the client browser.
Thanks
