ready to write UI

UI/gunicorn.conf.py

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+import os
+import subprocess
+import signal
+import atexit
+from flask import Flask, render_template
+from dotenv import load_dotenv
+import socket
+
+# Load environment variables from .env file
+load_dotenv()
+
+# Get configuration from environment variables
+backend_ip = os.getenv('BACKEND_IP')
+backend_port = os.getenv('BACKEND_PORT')
+backend_log_level = os.getenv('BACKEND_LOG_LEVEL')
+backend_data_directory = os.getenv('BACKEND_DATA_DIRECTORY')
+backend_log_file = os.getenv('BACKEND_LOG_FILE')
+backend_path = os.getenv('BACKEND_PATH')
+
+# Command to start the backend process
+backend_command = [
+    backend_path,
+    "-d", backend_data_directory,
+    "-l", backend_log_file,
+    "--level", backend_log_level,
+    "server",
+    "--port", backend_port,
+    "--address", backend_ip
+]
+
+backend_process = None
+
+def start_backend():
+    global backend_process
+    # Try to acquire the lock without blocking, timeout if another process holds the lock
+    print("Starting backend process...")
+    backend_process = subprocess.Popen(backend_command, preexec_fn = os.setsid)
+    print(f"Backend process started with PID: {backend_process.pid}")
+def on_starting(server):
+    # 这里放置启动后台进程的逻辑
+    start_backend()
+
+def when_ready(server):
+    print("Server is ready. Spawning workers")
+def send_exit_command(ip, port):
+    try:
+        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
+            sock.connect((ip, int(port)))
+            sock.sendall(b'exit\n')
+            response = sock.recv(1024)  # Optional: read response from server
+            print(f"Received response: {response.decode('utf-8')}")
+    except Exception as e:
+        print(f"Failed to send exit command: {e}")
+
+def stop_backend():
+    global backend_process
+    if backend_process is not None:
+        print(f"Sending exit command to backend process at {backend_ip}:{backend_port}...")
+        send_exit_command(backend_ip, backend_port)
+        print(f"Waiting for backend process with PID: {backend_process.pid} to terminate...")
+        backend_process.wait()
+        print("Backend process stopped.")
+        backend_process = None
+
+def on_exit(server):
+    stop_backend()