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POGoogle-App-Engine Channel API: Server doesn't send message to client
 

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    <p>I've created simple code to understand, how Google App Engine Channel API works. However, actually my code doesn't work and I dont know why. I am not very experienced in Python so pardon me, if it will be some stupid mistake.</p> <p>Server:</p> <pre><code>from google.appengine.api import channel import webapp2 import jinja2 import os import time channel_key = 'key' class MainHandler(webapp2.RequestHandler): def get(self): token = channel.create_channel(channel_key) template_values = {'token': channel_key} template = env.get_template('index.html') self.response.write(template.render(template_values)) class OpenedHandler(webapp2.RequestHandler): def post(self): channel.send_message(channel_key, "hi") env = jinja2.Environment(loader=jinja2.FileSystemLoader(os.path.dirname(__file__))) app = webapp2.WSGIApplication([ ('/', MainHandler), ('/opened', OpenedHandler) ], debug=True) </code></pre> <p>Client:</p> <pre><code>&lt;!DOCTYPE html&gt; &lt;html&gt; &lt;head&gt; &lt;/head&gt; &lt;body&gt; &lt;script&gt; var token = "{{ token }}"; onOpened = function() { var xhr = new XMLHttpRequest(); xhr.open('POST', '/opened'); xhr.send(); }; onMessage = function(message) { alert("something recieved"); alert(message); } &lt;/script&gt; &lt;script type="text/javascript" src="/_ah/channel/jsapi"&gt;&lt;/script&gt; &lt;script&gt; channel = new goog.appengine.Channel(token); socket = channel.open(); socket.onopen = onOpened; socket.onmessage = onMessage; socket.onerror = function(e){ alert("error:"+e['description']); }; socket.onclose = function(){ alert("close"); }; &lt;/script&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>Javascript console says, that it was successfully sended to /opened, but then no alert comes, like it havent responded. Do you have any idea, where the problem is?</p> <p>Thanks Toneks</p> <p><strong>EDIT:</strong> I added onerror and onclose event handlers to javascript and immediately after opnening the page it calls onerror event saying "Invalid+token" and then onclose event.</p>
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