First attempt at socket activation

server.py

@@ -37,7 +37,7 @@ from app.user_manager import UserManager
 from app.model_manager import ModelFileManager
 from app.custom_node_manager import CustomNodeManager
 from app.subgraph_manager import SubgraphManager
-from typing import Optional, Union
+from typing import Optional, Union, List, Tuple, Any
 from api_server.routes.internal.internal_routes import InternalRoutes
 from protocol import BinaryEventTypes
 
@@ -1040,28 +1040,84 @@ class PromptServer():
                                 keyfile=args.tls_keyfile)
             scheme = "https"
             
-        if verbose:
-            logging.info("Starting server\n")
-        for addr in addresses:
-            address = addr[0]
-            port = addr[1]
-            site = web.TCPSite(runner, address, port, ssl_context=ssl_ctx)
-            await site.start()
         
-            if not hasattr(self, 'address'):
-                self.address = address #TODO: remove this
-                self.port = port
-
-            if ':' in address:
-                address_print = "[{}]".format(address)
-            else:
-                address_print = address
+        # Check for systemd socket activation
+        systemd_sockets = self._get_systemd_sockets()
         
+        if systemd_sockets:
+            # Use systemd sockets instead of the provided addresses
             if verbose:
-                logging.info("To see the GUI go to: {}://{}:{}".format(scheme, address_print, port))
+                logging.info("Using systemd socket activation")
         
-        if call_on_start is not None:
-            call_on_start(scheme, self.address, self.port)
+            # Start sites using the systemd sockets
+            for sock in systemd_sockets:
+                # Get socket info for logging
+                try:
+                    sock_name = sock.getsockname()
+                    address = sock_name[0] if sock_name else "unknown"
+                    port = sock_name[1] if sock_name else "unknown"
+                except:
+                    address = "unknown"
+                    port = "unknown"
+                
+                if verbose:
+                    logging.info("To see the GUI go to: {}://{}:{}".format(scheme, address, port))
+            
+                # Create site using the socket
+                site = web.SockSite(runner, sock, ssl_context=ssl_ctx)
+                await site.start()
+            
+            # Store the socket info for reference
+            self.systemd_sockets = systemd_sockets
+        else:
+            # Fallback to original behavior
+            if verbose:
+                logging.info("Starting server\n")
+            
+            for addr in addresses:
+                address = addr[0]
+                port = addr[1]
+                site = web.TCPSite(runner, address, port, ssl_context=ssl_ctx)
+                await site.start()
+
+                if not hasattr(self, 'address'):
+                    self.address = address
+                    self.port = port
+
+                if ':' in address:
+                    address_print = "[{}]".format(address)
+                else:
+                    address_print = address
+
+                if verbose:
+                    logging.info("To see the GUI go to: {}://{}:{}".format(scheme, address_print, port))
+
+        # Call the callback if provided
+        if call_on_start:
+            await call_on_start()
+
+    def _get_systemd_sockets(self):
+        """Get sockets from systemd socket activation"""
+        sockets = []
+    
+        # Check if systemd socket activation is being used
+        if 'LISTEN_FDS' in os.environ and 'LISTEN_PID' in os.environ:
+            listen_fds = int(os.environ['LISTEN_FDS'])
+            listen_pid = int(os.environ['LISTEN_PID'])
+        
+            # Verify this is our process
+            if listen_pid == os.getpid():
+                # Create sockets from file descriptors 3, 4, 5, etc.
+                for i in range(listen_fds):
+                    try:
+                        # File descriptor starts at 3 for systemd
+                        fd = 3 + i
+                        sock = socket.fromfd(fd, socket.AF_INET, socket.SOCK_STREAM)
+                        sockets.append(sock)
+                    except Exception as e:
+                        logging.error(f"Failed to create socket from fd {fd}: {e}")
+    
+        return sockets
 
     def add_on_prompt_handler(self, handler):
         self.on_prompt_handlers.append(handler)