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Dockerfile

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+FROM python:3.9-slim
+
+RUN useradd -m -u 1000 user
+
+ENV HOME=/home/user \
+    PATH=/home/user/.local/bin:$PATH \
+    PORT=7860 \
+    HOST=0.0.0.0
+
+WORKDIR $HOME/app
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    gcc \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN pip install --no-cache-dir --upgrade pip
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY --chown=user . $HOME/app
+
+USER user
+
+EXPOSE 7860
+
+CMD ["python", "app.py"]
+```
+
+### 📁 **4. Create directory: templates/**
+Create a folder called `templates` in the same directory as your other files.

app.py

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+#!/usr/bin/env python3
+"""
+WHACKY CHAT APP - COMPLETE VERSION
+A modern, whacky Flask-SocketIO chat application
+"""
+
+from flask import Flask, render_template, request, redirect, url_for, session
+from flask_socketio import SocketIO, emit
+import secrets
+import os
+
+# Hugging Face Spaces compatibility
+PORT = int(os.environ.get("PORT", 7860))
+HOST = os.environ.get("HOST", "0.0.0.0")
+
+app = Flask(__name__)
+app.config['SECRET_KEY'] = secrets.token_hex(16)
+
+# Configure SocketIO for Hugging Face Spaces
+socketio = SocketIO(
+    app, 
+    cors_allowed_origins='*',
+    async_mode='eventlet',
+    logger=True,
+    engineio_logger=True
+)
+
+# Store connected users and user counter
+connected_users = {}
+user_counter = 0
+
+@app.route('/')
+def index():
+    # If user is not logged in, redirect to login
+    if 'user_number' not in session:
+        return redirect(url_for('login'))
+    return render_template('chat.html')
+
+@app.route('/login', methods=['GET', 'POST'])
+def login():
+    global user_counter
+    
+    if request.method == 'POST':
+        # Get username from form
+        username = request.form.get('username', '').strip()
+        
+        if username:
+            user_counter += 1
+            user_number = f"{user_counter:02d}"  # Format as two digits (01, 02, etc.)
+            
+            # Store user info in session
+            session['user_number'] = user_number
+            session['username'] = username
+            
+            return redirect(url_for('index'))
+    
+    return render_template('login.html')
+
+@app.route('/logout')
+def logout():
+    # Clear session
+    session.clear()
+    return redirect(url_for('login'))
+
+@socketio.on('connect')
+def handle_connect():
+    if 'user_number' not in session:
+        return False  # Reject connection if not logged in
+    
+    user_number = session['user_number']
+    username = session['username']
+    user_id = request.sid
+    
+    # Add user to connected users
+    connected_users[user_id] = {
+        'user_number': user_number,
+        'username': username,
+        'user_id': user_id
+    }
+    
+    # Send welcome message to the new user
+    emit('user_assigned', {
+        'user_number': user_number,
+        'username': username,
+        'message': f'Welcome {username}! You are user #{user_number}'
+    })
+    
+    # Notify all users about the new user
+    emit('user_joined', {
+        'user_number': user_number,
+        'username': username,
+        'message': f'{username} (User #{user_number}) has joined the chat!',
+        'total_users': len(connected_users)
+    }, broadcast=True)
+    
+    print(f"User {username} (#{user_number}) connected")
+
+@socketio.on('disconnect')
+def handle_disconnect():
+    user_id = request.sid
+    if user_id in connected_users:
+        user_info = connected_users[user_id]
+        user_number = user_info['user_number']
+        username = user_info['username']
+        del connected_users[user_id]
+        
+        # Notify all users about the user leaving
+        emit('user_left', {
+            'user_number': user_number,
+            'username': username,
+            'message': f'{username} (User #{user_number}) has left the chat!',
+            'total_users': len(connected_users)
+        }, broadcast=True)
+        
+        print(f"User {username} (#{user_number}) disconnected")
+
+@socketio.on('send_message')
+def handle_message(data):
+    if 'user_number' not in session:
+        return
+    
+    user_number = session['user_number']
+    username = session['username']
+    
+    # Broadcast message to all users
+    emit('new_message', {
+        'user_number': user_number,
+        'username': username,
+        'message': data['message'],
+        'timestamp': data.get('timestamp', '')
+    }, broadcast=True)
+
+@socketio.on('typing')
+def handle_typing(data):
+    if 'user_number' not in session:
+        return
+    
+    user_number = session['user_number']
+    username = session['username']
+    
+    emit('user_typing', {
+        'user_number': user_number,
+        'username': username
+    }, broadcast=True, include_self=False)
+
+if __name__ == '__main__':
+    print("🚀 Starting Whacky Chat App - Complete Version...")
+    print(f"📡 Server running on http://{HOST}:{PORT}")
+    print("✅ Ready for Hugging Face Spaces deployment!")
+    socketio.run(app, debug=True, host=HOST, port=PORT)

requirements.txt

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+flask==2.3.3
+flask-socketio==5.3.6
+python-socketio==5.8.0
+eventlet==0.33.3
+python-dotenv==1.0.0