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Created October 2, 2014 21:54
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A Kivy client for the AutobahnPython WebSocket Echo server (Twisted-based)
# As the Kivy docs ( ) state:
# install_twisted_rector must be called before importing and using the reactor.
from import install_twisted_reactor
from autobahn.twisted.websocket import WebSocketClientProtocol, \
class MyKivyClientProtocol(WebSocketClientProtocol):
def onOpen(self):
self.factory._app.print_message('WebSocket connection open.')
self.factory._proto = self
def onMessage(self, payload, isBinary):
if isBinary:
self.factory._app.print_message("Binary message received: {0} bytes".format(len(payload)))
self.factory._app.print_message("Got from server: {}".format(payload.decode('utf8')))
def onClose(self, wasClean, code, reason):
self.factory._app.print_message("WebSocket connection closed: {0}".format(reason))
self.factory._proto = None
class MyKivyClientFactory(WebSocketClientFactory):
protocol = MyKivyClientProtocol
def __init__(self, url, app):
WebSocketClientFactory.__init__(self, url)
# While the Kivy app needs a reference to the factory,
# the factory needs a reference to the Kivy app.
self._app = app
# Not sure why/whether _proto is needed?
self._proto = None
from import App
from kivy.uix.textinput import TextInput
from kivy.uix.label import Label
from kivy.uix.boxlayout import BoxLayout
from twisted.internet import reactor
class KivyClientApp(App):
def build(self):
root = self.setup_gui()
return root
def setup_gui(self):
Create a vertical oriented boxlayout that contains two widgets:
1) a label in which we show text sent/received
2) a textinput where you can enter text
to the server.
self.label = Label(text='Connecting...\n')
# Just 1 line of text; use 10% of the parent's height.
self.textbox = TextInput(size_hint_y=.1, multiline=False)
# When the 'Enter' key is pressed, call the method send_message
# that is defined below.
# Create the root widget ...
self.layout = BoxLayout(orientation='vertical')
# and add the two child widgets.
return self.layout
def connect_to_server(self):
Connect to the echoing websocket server.
# The Kivy app needs a reference to the factory object.
self._factory = MyKivyClientFactory("ws://localhost:9000", self)
reactor.connectTCP('', 9000, self._factory)
def send_message(self, *args):
Send the text entered that was entered in the texbox widget.
msg = self.textbox.text
proto = self._factory._proto
if msg and proto:
self.print_message('Sent to server: {}'.format(self.textbox.text))
self.textbox.text = ""
def print_message(self, msg):
self.label.text += msg + '\n'
if __name__ == '__main__':
import sys
from twisted.python import log
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