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#!./uwsgi --http-socket :9090 --gevent 100 --module tests.websockets_chat --gevent-monkey-patch
import uwsgi
import time
import gevent.select
import redis
def application(env, sr):
ws_scheme = 'ws'
if 'HTTPS' in env or env['wsgi.url_scheme'] == 'https':
ws_scheme = 'wss'
if env['PATH_INFO'] == '/':
sr('200 OK', [('Content-Type','text/html')])
return """
<html>
<head>
<script language="Javascript">
var s = new WebSocket("%s://%s/foobar/");
s.onopen = function() {
alert("connected !!!");
s.send("ciao");
};
s.onmessage = function(e) {
var bb = document.getElementById('blackboard')
var html = bb.innerHTML;
bb.innerHTML = html + '<br/>' + e.data;
};
s.onerror = function(e) {
alert(e);
}
s.onclose = function(e) {
alert("connection closed");
}
function invia() {
var value = document.getElementById('testo').value;
s.send(value);
}
</script>
</head>
<body>
<h1>WebSocket</h1>
<input type="text" id="testo"/>
<input type="button" value="invia" onClick="invia();"/>
<div id="blackboard" style="width:640px;height:480px;background-color:black;color:white;border: solid 2px red;overflow:auto">
</div>
</body>
</html>
""" % (ws_scheme, env['HTTP_HOST'])
elif env['PATH_INFO'] == '/favicon.ico':
return ""
elif env['PATH_INFO'] == '/foobar/':
uwsgi.websocket_handshake(env['HTTP_SEC_WEBSOCKET_KEY'], env.get('HTTP_ORIGIN', ''))
print("websockets...")
r = redis.StrictRedis(host='localhost', port=6379, db=0)
channel = r.pubsub()
channel.subscribe('foobar')
websocket_fd = uwsgi.connection_fd()
redis_fd = channel.connection._sock.fileno()
while True:
# wait max 4 seconds to allow ping to be sent
ready = gevent.select.select([websocket_fd, redis_fd], [], [], 4.0)
# send ping on timeout
if not ready[0]:
uwsgi.websocket_recv_nb()
for fd in ready[0]:
if fd == websocket_fd:
msg = uwsgi.websocket_recv_nb()
if msg:
r.publish('foobar', msg)
elif fd == redis_fd:
msg = channel.parse_response()
# only interested in user messages
if msg[0] == 'message':
uwsgi.websocket_send("[%s] %s" % (time.time(), msg))