Switch from socket.io to REST for cadence streaming in attempt to fix timeout issue

Procfile

@@ -1 +1 @@
-web: gunicorn --worker-class eventlet -w 1 --timeout 600 app:app
+web: gunicorn app:app --workers=4

app.py

@@ -3,7 +3,7 @@ import json
 from urllib import response
 from dateutil.relativedelta import relativedelta
 import os
-from flask import Flask, render_template
+from flask import Flask, render_template, request
 import jinja_partials
 from flask_htmx import HTMX
 import minify_html
@@ -18,7 +18,7 @@ app = Flask(__name__)
 app.config['SECRET_KEY'] = 'secret!'
 jinja_partials.register_extensions(app)
 htmx = HTMX(app)
-socketio = SocketIO(app, cors_allowed_origins='*')
+#socketio = SocketIO(app, cors_allowed_origins='*')
 db = DataBase(app)
 
 
@@ -37,12 +37,12 @@ def response_minify(response):
     return response
 
 
-@socketio.on('message')
+# @socketio.on('message')
-def handle_message(data):
+# def handle_message(data):
-    current_time = datetime.now().replace(
+#    current_time = datetime.now().replace(
-        microsecond=0).isoformat()
+#        microsecond=0).isoformat()
-    print('' + current_time + ' ' + json.dumps(data))
+#    print('' + current_time + ' ' + json.dumps(data))
-    db.insert_cadence(data['rpm'], data['id'])
+#    db.insert_cadence(data['rpm'], data['id'])
 
 
 @ app.route("/")
@@ -73,7 +73,17 @@ def overview(device_id):
     return render_template('overview.html', last_cadence=last_cadence, cadences=cadences[-15:], graph_data=graph_data)
 
 
+@ app.route("/cadence", methods=['POST'])
+def cadence():
+    data = request.get_json()
+    print('' + datetime.now().replace(microsecond=0).isoformat() +
+          ' ' + json.dumps(data))
+    db.insert_cadence(data['rpm'], data['id'])
+    return 'ok'
+
+
 if __name__ == '__main__':
     # Bind to PORT if defined, otherwise default to 5000.
     port = int(os.environ.get('PORT', 5000))
-    socketio.run(app, host='127.0.0.1', port=port)
+    #socketio.run(app, host='127.0.0.1', port=port)
+    app.run(host='127.0.0.1', port=port)

db.py

@@ -59,3 +59,7 @@ class DataBase():
 
     def get_device(self, device_id):
         return self.execute('SELECT * FROM device WHERE id = %s', [device_id], one=True)
+
+    def insert_cadence(self, rpm, device_id):
+        self.execute('INSERT INTO cadence (rpm, device_id) VALUES (%s, %s)',
+                     [rpm, device_id], commit=True)

static/js/BLE.js

@@ -24,6 +24,7 @@ async function connect(props) {
   console.log("> Notifications started");
   characteristic.addEventListener("characteristicvaluechanged", props.onChange);
   console.log("> Characteristic value changed event listener added");
+  /*
   socket = io({
     reconnection: true,
     reconnectionDelay: 1000,
@@ -43,6 +44,7 @@ async function connect(props) {
     }
     // else the socket will automatically try to reconnect
   });
+  */
 }
 
 async function disconnect() {
@@ -88,7 +90,15 @@ function parseCSC(e) {
   if (prevRes) {
     let rpm = revsToRPM(prevRes, res);
     if (rpm > 0)
-      socket.emit("message", { rpm: parseFloat(rpm.toFixed(2)), id: 1 });
+      //socket.emit("message", { rpm: parseFloat(rpm.toFixed(2)), id: 1 });
+      fetch("/cadence", {
+        method: "POST",
+        headers: {
+          Accept: "application/json, text/plain, */*",
+          "Content-Type": "application/json",
+        },
+        body: JSON.stringify({ rpm: parseFloat(rpm.toFixed(2)), id: 1 }),
+      });
   }
   prevRes = res;
   return res;