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import gradio as gr
import asyncio
import websockets
import json
import uuid
import argparse
import urllib.parse
from datetime import datetime
import logging
import sys
# Configure logging
logging.basicConfig(
level=logging.INFO,
format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
handlers=[logging.StreamHandler(sys.stdout)]
)
logger = logging.getLogger("chat-node")
# Dictionary to store active connections
active_connections = {}
# Dictionary to store message history for each chat room
chat_history = {}
# Get node name from URL or command line
def get_node_name():
parser = argparse.ArgumentParser(description='Start a chat node with a specific name')
parser.add_argument('--node-name', type=str, default=None, help='Name for this chat node')
parser.add_argument('--port', type=int, default=7860, help='Port to run the Gradio interface on')
args = parser.parse_args()
node_name = args.node_name
port = args.port
# If no node name specified, generate a random one
if not node_name:
node_name = f"node-{uuid.uuid4().hex[:8]}"
return node_name, port
async def websocket_handler(websocket, path):
"""Handle WebSocket connections."""
try:
# Extract room_id from path if present
path_parts = path.strip('/').split('/')
room_id = path_parts[0] if path_parts else "default"
# Register the new client
client_id = str(uuid.uuid4())
if room_id not in active_connections:
active_connections[room_id] = {}
chat_history[room_id] = []
active_connections[room_id][client_id] = websocket
# Send welcome message and chat history
welcome_msg = {
"type": "system",
"content": f"Welcome to room '{room_id}'! Connected from node '{NODE_NAME}'",
"timestamp": datetime.now().isoformat(),
"sender": "system",
"room_id": room_id
}
await websocket.send(json.dumps(welcome_msg))
# Send chat history
for msg in chat_history[room_id]:
await websocket.send(json.dumps(msg))
# Broadcast join notification
join_msg = {
"type": "system",
"content": f"User joined the room",
"timestamp": datetime.now().isoformat(),
"sender": "system",
"room_id": room_id
}
await broadcast_message(join_msg, room_id)
logger.info(f"New client {client_id} connected to room {room_id}")
# Handle messages from this client
async for message in websocket:
try:
data = json.loads(message)
# Add metadata to the message
data["timestamp"] = datetime.now().isoformat()
data["sender_node"] = NODE_NAME
data["room_id"] = room_id
# Store in history
chat_history[room_id].append(data)
if len(chat_history[room_id]) > 100: # Limit history to 100 messages
chat_history[room_id] = chat_history[room_id][-100:]
# Broadcast to all clients in the room
await broadcast_message(data, room_id)
except json.JSONDecodeError:
error_msg = {
"type": "error",
"content": "Invalid JSON format",
"timestamp": datetime.now().isoformat(),
"sender": "system",
"room_id": room_id
}
await websocket.send(json.dumps(error_msg))
except websockets.exceptions.ConnectionClosed:
logger.info(f"Client {client_id} disconnected from room {room_id}")
finally:
# Remove the client when disconnected
if room_id in active_connections and client_id in active_connections[room_id]:
del active_connections[room_id][client_id]
# Broadcast leave notification
leave_msg = {
"type": "system",
"content": f"User left the room",
"timestamp": datetime.now().isoformat(),
"sender": "system",
"room_id": room_id
}
await broadcast_message(leave_msg, room_id)
# Clean up empty rooms
if not active_connections[room_id]:
del active_connections[room_id]
# Optionally, you might want to keep the chat history
async def broadcast_message(message, room_id):
"""Broadcast a message to all clients in a room."""
if room_id in active_connections:
disconnected_clients = []
for client_id, websocket in active_connections[room_id].items():
try:
await websocket.send(json.dumps(message))
except websockets.exceptions.ConnectionClosed:
disconnected_clients.append(client_id)
# Clean up disconnected clients
for client_id in disconnected_clients:
del active_connections[room_id][client_id]
async def start_websocket_server(host='0.0.0.0', port=8765):
"""Start the WebSocket server."""
server = await websockets.serve(websocket_handler, host, port)
logger.info(f"WebSocket server started on ws://{host}:{port}")
return server
def send_message(message, username, room_id):
"""Function to send a message from the Gradio interface."""
if not message.strip():
return None
loop = asyncio.get_event_loop()
msg_data = {
"type": "chat",
"content": message,
"username": username,
"room_id": room_id
}
loop.create_task(broadcast_message(msg_data, room_id))
# Format the message for display
formatted_msg = f"{username}: {message}"
return formatted_msg
def join_room(room_id, chat_history_output):
"""Join a specific chat room."""
if not room_id.strip():
return "Please enter a valid room ID", chat_history_output
# Sanitize the room ID
room_id = urllib.parse.quote(room_id.strip())
# Create the room if it doesn't exist
if room_id not in chat_history:
chat_history[room_id] = []
# Format existing messages
formatted_history = []
for msg in chat_history[room_id]:
if msg.get("type") == "chat":
formatted_history.append(f"{msg.get('username', 'Anonymous')}: {msg.get('content', '')}")
elif msg.get("type") == "system":
formatted_history.append(f"System: {msg.get('content', '')}")
return f"Joined room: {room_id}", formatted_history
def create_gradio_interface():
"""Create and return the Gradio interface."""
with gr.Blocks(title=f"Chat Node: {NODE_NAME}") as interface:
gr.Markdown(f"# Chat Node: {NODE_NAME}")
gr.Markdown("Join a room by entering a room ID below or create a new one.")
with gr.Row():
room_id_input = gr.Textbox(label="Room ID", placeholder="Enter room ID")
join_button = gr.Button("Join Room")
chat_history_output = gr.Textbox(label="Chat History", lines=15, max_lines=15)
with gr.Row():
username_input = gr.Textbox(label="Username", placeholder="Enter your username", value="User")
message_input = gr.Textbox(label="Message", placeholder="Type your message here")
send_button = gr.Button("Send")
# Current room display
current_room_display = gr.Textbox(label="Current Room", value="Not joined any room yet")
# Event handlers
join_button.click(
join_room,
inputs=[room_id_input, chat_history_output],
outputs=[current_room_display, chat_history_output]
)
def send_and_clear(message, username, room_id):
if not room_id.startswith("Joined room:"):
return "Please join a room first", message
actual_room_id = room_id.replace("Joined room: ", "").strip()
formatted_msg = send_message(message, username, actual_room_id)
if formatted_msg:
return "", formatted_msg
return message, None
send_button.click(
send_and_clear,
inputs=[message_input, username_input, current_room_display],
outputs=[message_input, chat_history_output]
)
# Enter key to send message
message_input.submit(
send_and_clear,
inputs=[message_input, username_input, current_room_display],
outputs=[message_input, chat_history_output]
)
return interface
async def main():
"""Main function to start the application."""
global NODE_NAME
NODE_NAME, port = get_node_name()
# Start WebSocket server
server = await start_websocket_server()
# Create and launch Gradio interface
interface = create_gradio_interface()
# Custom middleware to extract node name from URL query parameters
from starlette.middleware.base import BaseHTTPMiddleware
class NodeNameMiddleware(BaseHTTPMiddleware):
async def dispatch(self, request, call_next):
global NODE_NAME
query_params = dict(request.query_params)
if "node_name" in query_params:
NODE_NAME = query_params["node_name"]
logger.info(f"Node name set to {NODE_NAME} from URL parameter")
response = await call_next(request)
return response
# Apply middleware
app = gr.routes.App.create_app(interface)
app.add_middleware(NodeNameMiddleware)
# Launch with the modified app
gr.routes.mount_gradio_app(app, interface, path="/")
# Run the FastAPI app with uvicorn
import uvicorn
config = uvicorn.Config(app, host="0.0.0.0", port=port)
server = uvicorn.Server(config)
logger.info(f"Starting Gradio interface on http://0.0.0.0:{port} with node name '{NODE_NAME}'")
await server.serve()
# Keep the WebSocket server running
await asyncio.Future()
if __name__ == "__main__":
asyncio.run(main()) |