I tested Tornado websocket to implement the functions of the chat room. It is very simple and the code is as follows:
Server:
[Python]
Import logging
Import tornado. escape
Import tornado. ioloop
Import tornado. options
Import tornado. web
Import tornado. websocket
Import OS. path
Import uuid
From tornado. options import define, options
Define ("port", default = 8888, help = "run on the given port", type = int)
Class Application (tornado. web. Application ):
Def _ init _ (self ):
Handlers = [
(R "/", MainHandler ),
(R "/websocket", ChatSocketHandler ),
]
Settings = dict (
Cookie_secret = "_ TODO: _ GENERATE_YOUR_OWN_RANDOM_VALUE_HERE __",
Template_path = OS. path. join (OS. path. dirname (_ file _), "templates "),
Static_path = OS. path. join (OS. path. dirname (_ file _), "static "),
Xsrf_cookies = True,
)
Tornado. web. Application. _ init _ (self, handlers, ** settings)
Class MainHandler (tornado. web. RequestHandler ):
Def get (self ):
Self. render ("index.html", messages = ChatSocketHandler. cache)
Class ChatSocketHandler (tornado. websocket. WebSocketHandler ):
Waiters = set ()
Cache = []
Cache_size = 200
Def allow_draft76 (self ):
# For iOS 5.0 Safari
Return True
Def open (self ):
Print "new client opened"
ChatSocketHandler. waiters. add (self)
Def on_close (self ):
ChatSocketHandler. waiters. remove (self)
@ Classmethod
Def update_cache (cls, chat ):
Cls. cache. append (chat)
If len (cls. cache)> cls. cache_size:
Cls. cache = cls. cache [-cls. cache_size:]
@ Classmethod
Def send_updates (cls, chat ):
Logging.info ("sending message to % d waiters", len (cls. waiters ))
For waiter in cls. waiters:
Try:
Waiter. write_message (chat)
Except t:
Logging. error ("Error sending message", exc_info = True)
Def on_message (self, message ):
Logging.info ("got message % r", message)
ChatSocketHandler. send_updates (message)
Def main ():
Tornado. options. parse_command_line ()
App = Application ()
App. listen (8080)
Tornado. ioloop. IOLoop. instance (). start ()
If _ name _ = "_ main __":
Main ()
Import logging
Import tornado. escape
Import tornado. ioloop
Import tornado. options
Import tornado. web
Import tornado. websocket
Import OS. path
Import uuid
From tornado. options import define, options
Define ("port", default = 8888, help = "run on the given port", type = int)
Class Application (tornado. web. Application ):
Def _ init _ (self ):
Handlers = [
(R "/", MainHandler ),
(R "/websocket", ChatSocketHandler ),
]
Settings = dict (
Cookie_secret = "_ TODO: _ GENERATE_YOUR_OWN_RANDOM_VALUE_HERE __",
Template_path = OS. path. join (OS. path. dirname (_ file _), "templates "),
Static_path = OS. path. join (OS. path. dirname (_ file _), "static "),
Xsrf_cookies = True,
)
Tornado. web. Application. _ init _ (self, handlers, ** settings)
Class MainHandler (tornado. web. RequestHandler ):
Def get (self ):
Self. render ("index.html", messages = ChatSocketHandler. cache)
Class ChatSocketHandler (tornado. websocket. WebSocketHandler ):
Waiters = set ()
Cache = []
Cache_size = 200
Def allow_draft76 (self ):
# For iOS 5.0 Safari
Return True
Def open (self ):
Print "new client opened"
ChatSocketHandler. waiters. add (self)
Def on_close (self ):
ChatSocketHandler. waiters. remove (self)
@ Classmethod
Def update_cache (cls, chat ):
Cls. cache. append (chat)
If len (cls. cache)> cls. cache_size:
Cls. cache = cls. cache [-cls. cache_size:]
@ Classmethod
Def send_updates (cls, chat ):
Logging.info ("sending message to % d waiters", len (cls. waiters ))
For waiter in cls. waiters:
Try:
Waiter. write_message (chat)
Except t:
Logging. error ("Error sending message", exc_info = True)
Def on_message (self, message ):
Logging.info ("got message % r", message)
ChatSocketHandler. send_updates (message)
Def main ():
Tornado. options. parse_command_line ()
App = Application ()
App. listen (8080)
Tornado. ioloop. IOLoop. instance (). start ()
If _ name _ = "_ main __":
Main ()
Client:
[Html]
<Html>
<Body>
<Script type = "text/javascript">
Var socket;
If (! Window. WebSocket ){
Window. WebSocket = window. WebSocket;
}
// Javascript Websocket Client
If (window. WebSocket ){
Socket = new WebSocket ("ws: // 10.197.60.125: 8080/websocket ");
Socket. onmessage = function (event ){
Var ta = document. getElementById ('responsetext ');
Ta. value = ta. value + '\ n' + event. data
};
Socket. onopen = function (event ){
Var ta = document. getElementById ('responsetext ');
Ta. value = "Web Socket opened! ";
};
Socket. onclose = function (event ){
Var ta = document. getElementById ('responsetext ');
Ta. value = ta. value + "Web Socket closed ";
};
} Else {
Alert ("Your browser does not support Web Socket .");
}
// Send Websocket data
Function send (message ){
If (! Window. WebSocket) {return ;}
If (socket. readyState = WebSocket. OPEN ){
Socket. send (message );
} Else {
Alert ("The socket is not open .");
}
}
</Script>
<H3> Send:
<Form onsubmit = "return false;">
<Input type = "text" name = "message" value = "Hello World! "/> <Input type =" button "value =" Send Web Socket Data "onclick =" send (this. form. message. value) "/>
<H3> Receive:
<Textarea id = "responseText" style = "width: 500px; height: 300px;"> </textarea>
</Form>
</Body>
</Html>
<Html>
<Body>
<Script type = "text/javascript">
Var socket;
If (! Window. WebSocket ){
Window. WebSocket = window. WebSocket;
}
// Javascript Websocket Client
If (window. WebSocket ){
Socket = new WebSocket ("ws: // 10.197.60.125: 8080/websocket ");
Socket. onmessage = function (event ){
Var ta = document. getElementById ('responsetext ');
Ta. value = ta. value + '\ n' + event. data
};
Socket. onopen = function (event ){
Var ta = document. getElementById ('responsetext ');
Ta. value = "Web Socket opened! ";
};
Socket. onclose = function (event ){
Var ta = document. getElementById ('responsetext ');
Ta. value = ta. value + "Web Socket closed ";
};
} Else {
Alert ("Your browser does not support Web Socket .");
}
// Send Websocket data
Function send (message ){
If (! Window. WebSocket) {return ;}
If (socket. readyState = WebSocket. OPEN ){
Socket. send (message );
} Else {
Alert ("The socket is not open .");
}
}
</Script>
<H3> Send:
<Form onsubmit = "return false;">
<Input type = "text" name = "message" value = "Hello World! "/> <Input type =" button "value =" Send Web Socket Data "onclick =" send (this. form. message. value) "/>
<H3> Receive:
<Textarea id = "responseText" style = "width: 500px; height: 300px;"> </textarea>
</Form>
</Body>
</Html>
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