fourdollars/app.py

## app.py
#!/usr/bin/env python

import time
from flask import Flask, render_template, Response

app = Flask(__name__)

@app.route("/")
def index():
    return render_template('index.html')

def get_message():
    '''this could be any function that blocks until data is ready'''
    time.sleep(1.0)
    s = time.ctime(time.time())
    return s

@app.route('/sse/')
def sse():
    return render_template('sse.html')

@app.route('/stream')
def stream():
    def eventStream():
        while True:
            # wait for source data to be available, then push it
            yield 'data: {}\n\n'.format(get_message())
    return Response(eventStream(), mimetype="text/event-stream")

if __name__ == "__main__":
    app.run()

## sse.html
<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <script>
var es = new EventSource("{{ url_for('stream') }}");
es.onmessage = function(e) {
    console.log("" + e.data + " from " + e.origin);
};
    </script>
    </head>
    <body>
        <h1>SSE test</h1>
    </body>
</html>
	#!/usr/bin/env python

	import time
	from flask import Flask, render_template, Response

	app = Flask(__name__)

	@app.route("/")
	def index():
	return render_template('index.html')

	def get_message():
	'''this could be any function that blocks until data is ready'''
	time.sleep(1.0)
	s = time.ctime(time.time())
	return s

	@app.route('/sse/')
	def sse():
	return render_template('sse.html')

	@app.route('/stream')
	def stream():
	def eventStream():
	while True:
	# wait for source data to be available, then push it
	yield 'data: {}\n\n'.format(get_message())
	return Response(eventStream(), mimetype="text/event-stream")

	if __name__ == "__main__":
	app.run()
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8">
	<script>
	var es = new EventSource("{{ url_for('stream') }}");
	es.onmessage = function(e) {
	console.log("" + e.data + " from " + e.origin);
	};
	</script>
	</head>
	<body>
	<h1>SSE test</h1>
	</body>
	</html>