Created
August 25, 2012 09:50
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Tornado, MongoDB, WebSockets -chat
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import logging | |
import tornado.escape | |
import tornado.ioloop | |
import tornado.options | |
import tornado.web | |
import tornado.websocket | |
import os.path | |
import asyncmongo | |
import time | |
import functools | |
from tornado.options import define, options | |
define('port', default=81, help='run on the given port', type=int) | |
class Application(tornado.web.Application): | |
def __init__(self): | |
self.db = asyncmongo.Client(pool_id='mydb', host='127.0.0.1', port=27017, dbname='test') | |
handlers = [ | |
(r'/', MainHandler), | |
(r'/add_message', AddHandler), | |
(r'/chatsocket', ChatSocketHandler) | |
] | |
settings = dict( | |
cookie_secret='43oETzKXQAGaYdk6fd8fG1kJFuYh7EQnp2XdTP1o/Vo=', | |
template_path=os.path.join(os.path.dirname(__file__), 'templates'), | |
static_path=os.path.join(os.path.dirname(__file__), 'static'), | |
xsrf_cookies=True, | |
autoescape=None | |
) | |
tornado.web.Application.__init__(self, handlers, **settings) | |
class MainHandler(tornado.web.RequestHandler): | |
@property | |
def db(self): | |
return self.application.db | |
@tornado.web.asynchronous | |
def get(self): | |
self.db.messages.find({}, limit=50, sort=[('time', -1)], callback=self.on_response) | |
def on_response(self, response, error): | |
if error: | |
raise tornado.web.HTTPError(500) | |
self.render('index.html', messages=response[::-1]) | |
class AddHandler(tornado.web.RequestHandler): | |
def post(self): | |
logging.info('Post message') | |
self.write('Your browser don\'t support JavaScript or WebSockets or Flash.'); | |
class ChatSocketHandler(tornado.websocket.WebSocketHandler): | |
waiters = set() | |
@property | |
def db(self): | |
return self.application.db | |
def open(self): | |
ChatSocketHandler.waiters.add(self) | |
logging.info('Add waiter') | |
def on_close(self): | |
ChatSocketHandler.waiters.remove(self) | |
logging.info('Remove waiter') | |
@classmethod | |
def send_updates(cls, result, error, chat): | |
if error: | |
raise tornado.web.HTTPError(500) | |
logging.info('Sending message to %d waiters', len(cls.waiters)) | |
for waiter in cls.waiters: | |
try: | |
waiter.write_message(chat) | |
except: | |
logging.error('Error sending message', exc_info=True) | |
def on_message(self, message): | |
logging.info('Got message %r', message) | |
parsed = tornado.escape.json_decode(message) | |
chat = { | |
'body': parsed['body'], | |
'time': time.time() | |
} | |
chat['html'] = self.render_string('message.html', message=chat) | |
callback = functools.partial(ChatSocketHandler.send_updates, chat=chat) | |
self.db.messages.insert(chat, callback=callback) | |
def main(): | |
tornado.options.parse_command_line() | |
app = Application() | |
app.listen(options.port) | |
tornado.ioloop.IOLoop.instance().start() | |
if __name__ == '__main__': | |
main() |
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WEB_SOCKET_SWF_LOCATION = "/static/WebSocketMain.swf"; | |
WEB_SOCKET_DEBUG = true; | |
$(document).ready(function() { | |
if (!window.console) window.console = {}; | |
if (!window.console.log) window.console.log = function() {}; | |
$("#messageform").live("submit", function() { | |
newMessage($(this)); | |
return false; | |
}); | |
$("#messageform").live("keypress", function(e) { | |
if (e.keyCode == 13) { | |
newMessage($(this)); | |
return false; | |
} | |
}); | |
$("#message").select(); | |
updater.start(); | |
}); | |
function newMessage(form) { | |
var message = form.formToDict(); | |
updater.socket.send(JSON.stringify(message)); | |
form.find("input[type=text]").val("").select(); | |
} | |
jQuery.fn.formToDict = function() { | |
var fields = this.serializeArray(); | |
var json = {} | |
for (var i = 0; i < fields.length; i++) { | |
json[fields[i].name] = fields[i].value; | |
} | |
if (json.next) delete json.next; | |
return json; | |
}; | |
var updater = { | |
socket: null, | |
start: function() { | |
updater.socket = new WebSocket("ws://"+document.location.host+"/chatsocket"); | |
updater.socket.onmessage = function(event) { | |
updater.showMessage(JSON.parse(event.data)); | |
} | |
updater.socket.onclose = function () { | |
document.location.reload(); | |
} | |
}, | |
showMessage: function(message) { | |
var existing = $("#m" + message.id); | |
if (existing.length > 0) return; | |
var node = $(message.html); | |
node.hide(); | |
$("#inbox").append(node); | |
node.slideDown(); | |
} | |
}; |
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> | |
<html xmlns="http://www.w3.org/1999/xhtml"> | |
<head> | |
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> | |
<title>Chat Demo</title> | |
<link rel="stylesheet" href="{{ static_url('chat.css') }}" type="text/css"/> | |
<script src="{{ static_url('swfobject.js') }}" type="text/javascript"></script> | |
<script src="{{ static_url('web_socket.js') }}" type="text/javascript"></script> | |
</head> | |
<body> | |
<div id="body"> | |
<div id="inbox"> | |
{% for message in messages %} | |
{% include "message.html" %} | |
{% end %} | |
</div> | |
<div id="input"> | |
<form action="/add_message" method="post" id="messageform"> | |
<table> | |
<tr> | |
<td><input name="body" id="message" style="width:500px"/></td> | |
<td style="padding-left:5px"> | |
<input type="submit" value="{{ _('Post') }}"/> | |
<input type="hidden" name="next" value="{{ request.path }}"/> | |
{{ xsrf_form_html() }} | |
</td> | |
</tr> | |
</table> | |
</form> | |
</div> | |
</div> | |
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js" type="text/javascript"></script> | |
<script src="{{ static_url('chat.js') }}" type="text/javascript"></script> | |
</body> | |
</html> |
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{% import tornado.escape %} | |
{% import time %} | |
<div class="message"> | |
<small>{{ time.strftime('%H:%M:%S - %d.%m.%Y', time.localtime(message['time'])) }}</small> | |
{{ tornado.escape.linkify(message['body']) }} | |
</div> |
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