Update app.py

app.py

@@ -1,20 +1,20 @@
-import eventlet
-eventlet.monkey_patch()  # This MUST be the first line
-
 import os, time, requests, threading, io
 from flask import Flask, render_template, request, session, send_from_directory, jsonify
 from flask_socketio import SocketIO, emit
 
+# We are switching to gevent for better stability in 2026
+from gevent import monkey
+monkey.patch_all()
+
 app = Flask(__name__)
-app.config['SECRET_KEY'] = 'suno_final_2026'
-# 'eventlet' is the key to fixing the "Invalid Session" error
-socketio = SocketIO(app, cors_allowed_origins="*", async_mode='eventlet')
+app.config['SECRET_KEY'] = 'suno_modern_2026'
+# Using gevent as the engine
+socketio = SocketIO(app, cors_allowed_origins="*", async_mode='gevent')
 
 MUSIC_FOLDER = 'saved_music'
 if not os.path.exists(MUSIC_FOLDER):
     os.makedirs(MUSIC_FOLDER)
 
-# This dictionary remembers which browser tab belongs to which song task
 task_to_sid = {}
 
 @app.route('/')
@@ -33,12 +33,10 @@ def callback():
         filename = f"{task_id}.mp3"
         filepath = os.path.join(MUSIC_FOLDER, filename)
         try:
-            # Download from Suno to your server
             r = requests.get(audio_url, timeout=30)
             with open(filepath, 'wb') as f:
                 f.write(r.content)
             
-            # Send the download link to the user
             if task_id in task_to_sid:
                 socketio.emit('status', {
                     'msg': '✨ Success! Music saved to server.',
@@ -46,7 +44,7 @@ def callback():
                     'done': True
                 }, room=task_to_sid[task_id])
         except Exception as e:
-            print(f"Callback Download Error: {e}")
+            print(f"Download Error: {e}")
 
     return jsonify({"status": "ok"}), 200
 
@@ -57,37 +55,32 @@ def get_music(filename):
 @socketio.on('save_token')
 def save_token(data):
     session['api_token'] = data.get('token')
-    emit('status', {'msg': '🔑 Token Linked and Secured.'})
+    emit('status', {'msg': '🔑 Token Linked.'})
 
 @socketio.on('start_gen')
 def handle_gen(payload):
     token = session.get('api_token')
     if not token:
-        emit('status', {'msg': '❌ Error: Please connect your token first.'})
+        emit('status', {'msg': '❌ Error: Connect token first.'})
         return
 
     headers = {"Authorization": f"Bearer {token}", "Content-Type": "application/json"}
     
-    # Fix the "Instrumental cannot be null" error
-    if payload.get('instrumental') is None:
-        payload['instrumental'] = False
-
-    # Tell Suno where to send the finished song
+    # Fix potential nulls
+    payload['instrumental'] = bool(payload.get('instrumental'))
     payload['callBackUrl'] = request.host_url + "callback"
     
     try:
         res = requests.post("https://api.sunoapi.org/api/v1/generate/upload-cover", json=payload, headers=headers)
         res_json = res.json()
         
-        # Safe check to prevent NoneType error
         api_data = res_json.get('data')
         if api_data:
             task_id = api_data.get('taskId')
-            # Link this song to the current browser session
             task_to_sid[task_id] = request.sid
-            emit('status', {'msg': f'🚀 Task {task_id} started. Don\'t close this tab!'})
+            emit('status', {'msg': f'🚀 Task {task_id} started...'})
         else:
-            msg = res_json.get('msg') or "Unknown API error"
+            msg = res_json.get('msg') or "API Error"
             emit('status', {'msg': f'❌ Suno Error: {msg}'})
             
     except Exception as e: