Process incoming request #735

Elappnano · 2021-04-26T11:36:59Z

Elappnano
Apr 26, 2021

Hi Miguel,
I am using socket-io with flask to show incoming values on client. But the returned value is null. The server and client code are as follows:

from flask import Flask, render_template, jsonify, request
from flask_socketio import SocketIO, emit

app=Flask(__name__)

socketio = SocketIO(
    app,
    cors_allowed_origins="*")

values=[]
random_decimal=[]
@app.route('/')
def index():
    return render_template('index.html')

@socketio.on('connect')
def on_connect():
    value = request.args.get('test')
    values.append(value)
    random_decimal= str(values)
    emit('after connect', {'data':random_decimal})

if __name__=='__main__':
    socketio.run(app, debug=True)

====================================================

<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>SocketIO example</title>
    <script src="https://code.jquery.com/jquery-3.3.1.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.0.1/socket.io.js"></script>
    <script type="text/javascript">
        $(document).ready(function(){
            //sending connect request to the server
            var socket = io.connect('http://127.0.0.1:5000');

            socket.on('after connect', function(msg){
                console.log('after connect', msg);
                $('#log').append('<br>'+ $('<div/>').text('Received: ' + msg.data).html());
            });
        });
    </script>
</head>
<body>
    <h1>SocketIO Example</h1>
    <h2>Receive:</h2>
    <div id="log"></div>
    
</body>

miguelgrinberg · 2021-04-26T13:14:38Z

miguelgrinberg
Apr 26, 2021
Maintainer

You aren't passing any test query argument. Try connecting as follows:

 var socket = io.connect('http://127.0.0.1:5000', {query: {'test': '123'}});

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miguelgrinberg Apr 26, 2021 Maintainer

Elappnano
Apr 26, 2021

miguelgrinberg
Apr 26, 2021
Maintainer