javascript - SocketIO 400 Bad Request Error -

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i'm pretty new web-dev , have been struggling bug multiple days have no clue how resolve/have no idea causing it. @ point i've exhausted think causing problem, insights appreciated!

i running apache webserver through flask python framework. client-side js (app2.js) follows:

// set basic variables app var socket;  $(document).ready(function() {         socket = io.connect('https://' + document.domain + ':' + location.port+'/main');           console.log(document.domain);         console.log("document ready");         socket.on('disconnect', function() {            console.log("disconnecting...");           });   console.log("simple logging"); });

further have reduced .html page loads above script following: 

<!doctype html> <html> <body>  <h1>my first heading</h1>  <p>my first paragraph.</p>  </body>  <script type="text/javascript" src="//code.jquery.com/jquery-1.4.2.min.js"></script> <script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/socket.io/1.3.6/socket.io.min.js"></script> <script src="{{ url_for('static', filename='scripts/app2.js') }}"></script> </html>

when load page, see following printed in chrome console:

document ready simple logging https://domain/socket.io/?eio=3&transport=polling&t=1465632212131-2&sid=d4082f4636fd4d04a5dcc4b660ee5b2a 400 (bad request) disconnecting... post https://domain/socket.io/?eio=3&transport=polling&t=1465632212141-3&sid=d4082f4636fd4d04a5dcc4b660ee5b2a 400 (bad request)

i have no clue source of these malformed get/post requests are, consequence of them, page becomes non-functional. if refresh page, won't these errors. other times, refresh page , still same error logs , if stay on page long enough, more get/post errors of same flavor , "disconnecting" message sprinkled in.

it's lack of reproducibility throwing me off, , i'm not sure else consider/how go fixing this. i've tried reduce client-side .html/.js files bare minimum see wrong , reason code still failing. happy provide additional information pinpoint going on.

thanks!


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