Created
June 5, 2013 08:07
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Example of SSE using flask. The html template should be in the templates folder
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script type="text/javascript" src="//code.jquery.com/jquery-1.8.0.min.js"></script> | |
| <script type="text/javascript"> | |
| $(document).ready( | |
| function() { | |
| sse = new EventSource('/my_event_source'); | |
| sse.onmessage = function(message) { | |
| console.log('A message has arrived!'); | |
| $('#output').append('<li>'+message.data+'</li>'); | |
| } | |
| }) | |
| </script> | |
| </head> | |
| <body> | |
| <h2>Demo</h2> | |
| <ul id="output"> | |
| </ul> | |
| </body> | |
| </html> |
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| #!/usr/bin/env python | |
| import gevent | |
| import gevent.monkey | |
| from gevent.pywsgi import WSGIServer | |
| gevent.monkey.patch_all() | |
| from flask import Flask, Response, render_template | |
| import redis | |
| app = Flask(__name__) | |
| def event_stream(): | |
| rc = redis.Redis() | |
| ps = rc.pubsub() | |
| ps.subscribe(['chat:tarun']) | |
| for item in ps.listen(): | |
| if item['type'] == 'message': | |
| yield 'data: %s:%s\n\n' % (item['channel'], item['data']) | |
| @app.route('/my_event_source') | |
| def sse_request(): | |
| return Response(event_stream(), mimetype='text/event-stream') | |
| @app.route('/') | |
| def page(): | |
| return render_template('sse.html') | |
| if __name__ == '__main__': | |
| http_server = WSGIServer(('127.0.0.1', 8001), app) | |
| http_server.serve_forever() |
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