establish initial socket connection

api/api.py

@@ -1,5 +1,7 @@
 from flask import Blueprint, request, jsonify, session
 from .users.user_endpoint import UserEndpoint
+from app import socketio
+from flask_socketio import emit
 
 api = Blueprint('api', __name__, url_prefix='/api')
 
@@ -15,3 +17,13 @@ def api_users():
 @api.route('/user')
 def api_user():
     return jsonify(UserEndpoint.user())
+
+@socketio.on('connect')
+def handle_connection():
+    print('connected')
+    socketio.emit('connect', payload={'data':'connection'})
+
+@socketio.on('message')
+def handle_message(message):
+    print(message)
+    emit('message return', {'data':'a message was sent'})

app.py

@@ -13,12 +13,12 @@ app = Flask(__name__)
 bcrypt = Bcrypt(app)
 app.config['CORS_HEADERS'] = 'Content-Type'
 app.config.from_object(DevelopmentConfig)
-socketio = SocketIO(app)
-
+socketio = SocketIO(app, cors_allowed_origins="http://localhost:3000")
+# cors_allowed_origins="http://localhost:3000"
 def create_app():
     CORS(app, resources={
         r"/api/*": {"origins": "http://localhost:3000"},
-        r"/auth/*": {"origins": "http://localhost:3000"}
+        r"/auth/*": {"origins": "http://localhost:3000"},
     })
     db.init_app(app)
     ma.init_app(app)

configuration/config.py

@@ -14,7 +14,7 @@ class DevelopmentConfig(BaseConfig):
     DEBUG = True
     BCRYPT_LOG_ROUNDS = 4
     SQLALCHEMY_DATABASE_URI = DATABASE
-    PORT = 8000
+    PORT = 5000
 
 
 class TestingConfig(BaseConfig):

requirements.txt

@@ -3,6 +3,8 @@ astroid==2.3.1
 bcrypt==3.1.7
 cffi==1.12.3
 Click==7.0
+dnspython==1.16.0
+eventlet==0.25.1
 Flask==1.1.1
 Flask-Bcrypt==0.7.1
 Flask-Cors==3.0.8
@@ -12,7 +14,6 @@ Flask-Script==2.0.6
 Flask-SocketIO==4.2.1
 Flask-SQLAlchemy==2.4.1
 Flask-Testing==0.7.1
-gevent==1.4.0
 greenlet==0.4.15
 isort==4.3.21
 itsdangerous==1.1.0
@@ -23,6 +24,7 @@ MarkupSafe==1.1.1
 marshmallow==3.2.0
 marshmallow-sqlalchemy==0.19.0
 mccabe==0.6.1
+monotonic==1.5
 numpy==1.17.2
 psycopg2==2.8.3
 pycparser==2.19