fix: start_server.py — исправлено завершение по Ctrl+C

Проблемы:
- signal_handler блокировал shutdown()
- Порт не освобождался после Ctrl+C
- Невозможно было перезапустить сервер

Решения:
- Убран signal_handler — используется KeyboardInterrupt
- shutdown() вызывается в отдельном потоке (avoid deadlock)
- with контекст для автоматического закрытия
- allow_reuse_address = True для быстрого рестарта
- Обработка OSError при занятом порте

web-client/start_server.py

@@ -13,16 +13,13 @@ import argparse
 import http.server
 import socketserver
 import os
-import signal
 import sys
+import threading
 from pathlib import Path
 
 PORT = 8080
 SCRIPT_DIR = Path(__file__).parent.resolve()
 
-# Global server reference for cleanup
-httpd = None
-
 
 class CustomHandler(http.server.SimpleHTTPRequestHandler):
     """Custom handler with better logging."""
@@ -36,32 +33,20 @@ class CustomHandler(http.server.SimpleHTTPRequestHandler):
         pass
 
 
-def signal_handler(sig, frame):
-    """Handle Ctrl+C gracefully."""
-    print("\n👋 Shutting down...")
-    if httpd:
-        # Use shutdown() to stop serve_forever()
-        httpd.shutdown()
+class ReusableTCPServer(socketserver.TCPServer):
+    """TCP Server with address reuse enabled."""
+    allow_reuse_address = True
 
 
 def main():
-    global httpd
-    
     parser = argparse.ArgumentParser(description='WebSocket Client Web Server')
     parser.add_argument('--port', type=int, default=PORT, help=f'Port (default: {PORT})')
     parser.add_argument('--host', default='0.0.0.0', help='Host (default: 0.0.0.0)')
     args = parser.parse_args()
 
-    # Change to websocket-service directory
+    # Change to script directory
     os.chdir(SCRIPT_DIR)
 
-    # Register signal handlers
-    signal.signal(signal.SIGINT, signal_handler)
-    signal.signal(signal.SIGTERM, signal_handler)
-
-    # Allow socket reuse
-    socketserver.TCPServer.allow_reuse_address = True
-
     print(f"""
 ╔══════════════════════════════════════════════════════════╗
 ║     🛰️  Wyoming Satellite WebSocket Client Server       ║
@@ -74,16 +59,32 @@ def main():
 ╚══════════════════════════════════════════════════════════╝
     """)
 
-    httpd = socketserver.TCPServer((args.host, args.port), CustomHandler)
-    print(f"🚀 Server started on http://{args.host}:{args.port}")
-    
     try:
-        httpd.serve_forever()
-    except KeyboardInterrupt:
-        pass
-    finally:
-        print("\n👋 Server stopped")
-        httpd.server_close()
+        with ReusableTCPServer((args.host, args.port), CustomHandler) as httpd:
+            print(f"🚀 Server started on http://{args.host}:{args.port}")
+            print("📖 Serving files from:", SCRIPT_DIR)
+            print("\n⌨️  Press Ctrl+C to stop\n")
+            
+            try:
+                httpd.serve_forever()
+            except KeyboardInterrupt:
+                print("\n👋 Shutting down gracefully...")
+                # Shutdown in a separate thread to avoid deadlock
+                shutdown_thread = threading.Thread(target=httpd.shutdown)
+                shutdown_thread.start()
+                shutdown_thread.join(timeout=2)
+                httpd.server_close()
+                print("✅ Server stopped successfully")
+                
+    except OSError as e:
+        print(f"\n❌ Error: Could not bind to port {args.port}")
+        print(f"   {e}")
+        print("\n💡 Try using a different port:")
+        print(f"   python3 {sys.argv[0]} --port 8081\n")
+        sys.exit(1)
+    except Exception as e:
+        print(f"\n❌ Unexpected error: {e}")
+        sys.exit(1)
 
 
 if __name__ == "__main__":