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POHow to stream twitter metadata to a client browser from server in Python/flask
 

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  1. POHow to stream twitter metadata to a client browser from server in Python/flask
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    <p>I'm trying to return to the client a stream of twitter metadata which the client enters in a form filtered by tweepy's 'track'. </p> <p>The problem I'm having is that nothing is returned back to the browser, eventhough the server receives it and processes the request. This is my code so far:</p> <p>The main.py:</p> <pre><code>import flask from flask.views import MethodView from tweetStreamsRT import StreamerRt app = flask.Flask(__name__) app.secret_key = "asecret" class View(MethodView): def get(self): return flask.render_template('index.html') def post(self): results = StreamerRt().filter(track = (flask.request.form['event'])) flask.flash(results) return self.get() app.add_url_rule('/', view_func = View.as_view('index'), methods=['GET', 'POST']) app.debug = True app.run() </code></pre> <p>The class connecting to the Twitter Streaming API:</p> <pre><code>import sys import tweepy import json import time #from textwrap import TextWrapper import pymongo CONSUMER_KEY = '' CONSUMER_SECRET = '' ACCESS_TOKEN = '' ACCESS_TOKEN_SECRET = '' auth = tweepy.OAuthHandler(CONSUMER_KEY,CONSUMER_SECRET) auth.set_access_token(ACCESS_TOKEN,ACCESS_TOKEN_SECRET) connection = pymongo.Connection() db = connection.twitterStream class Listener(tweepy.StreamListener): def on_status(self, status): message = {} if status.author.lang == 'en': try: message = { 'Author': status.author.screen_name, 'Author_id': status.id, 'Time_normal': str(status.created_at), 'geo_enabled': status.author.geo_enabled, 'Geo': status.geo, 'Place' : status.place, 'Coordinates': status.coordinates} db.tweetStream.insert(message) except Exception, e: print &gt;&gt; sys.stderr, 'Encountered Exception:', e pass def on_error(self, status_code): waitPeriod = 60 if status_code == 420: print &gt;&gt; sys.stderr, 'Encountered a %i Error, will retry in %i minutes' % \ (status_code, waitPeriod/60) time.sleep(waitPeriod) waitPeriod *= 2 return waitPeriod else: print &gt;&gt; sys.stderr, 'Encountered error with status code:', status_code return True def on_timeout(self): print &gt;&gt; sys.stderr, 'Timeout...' return True def StreamerRt(): return tweepy.streaming.Stream(auth, Listener(), timeout=60) </code></pre> <p>My html file which inherits from a base and forms html file:</p> <pre><code>{% extends "base.html" %} {% import "forms.html" as forms %} {% block page_header %} &lt;div class="page-header"&gt; &lt;h1&gt;Welcome&lt;/h1&gt; &lt;/div&gt; {% endblock %} {% block content %} &lt;h2&gt;Enter the Event you would like to follow&lt;/h2&gt; &lt;form action="/" method="post"&gt; &lt;input type="text" name="event" /&gt; &lt;input type="submit" value="Submit Query" /&gt; &lt;/form&gt; {% with messages = get_flashed_messages() %} {% if messages %} Results: &lt;pre&gt; {% for message in messages %} {{ message }} {% endfor %} &lt;/pre&gt; {% endif %} {% endwith %} {% endblock %} </code></pre> <p>It seems that I can't return any streaming data to the client.</p> <p>How could you return certain metadata from Twitter Streaming API to the browser, at the same time that it is written into the DB.</p> <p>Thanks</p> <p>Furthermore the function StreamerRt doesnt filter by track as input from the client, but seems to return the whole public timeline.</p>
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