newly created test server works so why the fuck does my other server not work

server.old.py

@@ -0,0 +1,40 @@
+import socket
+import time
+import threading
+
+class ServerVCKO:
+    def __init__(self):
+        self.host = socket.gethostname()
+        self.port = 5000 
+        self.header_size = 1024
+        self.format = "utf-8"
+        self.disconnect_message = "!DISCONNECT"
+
+    def handle_client(self, conn, addr):
+        print(f"Connection from: {addr}")
+        connected = True
+        while connected:
+            msg_length = conn.recv(self.header_size).decode(self.format)
+            if msg_length:
+                msg_length = int(msg_length)
+                msg = conn.recv(msg_length).decode(self.format)
+                if msg == disconnect_message:
+                    connected = False
+                print(f"[{addr}] {msg}")
+                conn.send("msg received".encode(self.format))
+        conn.close()
+    def start(self):
+        server_socket = socket.socket()  
+        server_socket.bind((self.host, self.port))
+        server_socket.listen()
+        print(f"server is listening on {socket.gethostbyname(self.host)}")
+        while True:
+            conn, addr = server_socket.accept()
+            thread = threading.Thread(target=self.handle_client, args=(conn, addr))
+            thread.start
+            print(f"Active threads: {threading.active_count() - 1}")
+ 
+if __name__ == '__main__':
+    print("server starting")
+    server = ServerVCKO()
+    server.start()

server.py

@@ -1,40 +1,46 @@
 import socket 
-import time
 import threading
 
-class ServerVCKO:
+HEADER = 1024
-    def __init__(self):
+PORT = 5000
-        self.host = socket.gethostname()
+SERVER = socket.gethostbyname(socket.gethostname())
-        self.port = 5000 
+ADDR = (SERVER, PORT)
-        self.header_size = 1024
+FORMAT = 'utf-8'
-        self.format = "utf-8"
+DISCONNECT_MESSAGE = "!DISCONNECT"
-        self.disconnect_message = "!DISCONNECT"
 
-    def handle_client(self, conn, addr):
+server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-        print(f"Connection from: {addr}")
+server.bind(ADDR)
-        connected = True
+
-        while connected:
+def handle_client(conn, addr):
-            msg_length = conn.recv(self.header_size).decode(self.format)
+    print(f"[NEW CONNECTION] {addr} connected.")
-            if msg_length:
+
-                msg_length = int(msg_length)
+    connected = True
-                msg = conn.recv(msg_length).decode(self.format)
+    while connected:
-                if msg == disconnect_message:
+        msg_length = conn.recv(HEADER).decode(FORMAT)
+        if msg_length:
+            msg_length = int(msg_length)
+            msg = conn.recv(msg_length).decode(FORMAT)
+            match msg:
+                case DISCONNECT_MESSAGE:
                     connected = False
-                print(f"[{addr}] {msg}")
+                case "test":
-                conn.send("msg received".encode(self.format))
+                    print(f"[{addr}] {msg}")
-        conn.close()
+                    conn.send("Msg received special response".encode(FORMAT))
-    def start(self):
+                case _:
-        server_socket = socket.socket()  
+                    print(f"[{addr}] {msg}")
-        server_socket.bind((self.host, self.port))
+                    conn.send("Msg received".encode(FORMAT))
-        server_socket.listen()
+    conn.close()
-        print(f"server is listening on {socket.gethostbyname(self.host)}")
-        while True:
-            conn, addr = server_socket.accept()
-            thread = threading.Thread(target=self.handle_client, args=(conn, addr))
-            thread.start
-            print(f"Active threads: {threading.active_count() - 1}")
         
-if __name__ == '__main__':
+
-    print("server starting")
+def start():
-    server = ServerVCKO()
+    server.listen()
-    server.start()
+    print(f"[LISTENING] Server is listening on {SERVER}")
+    while True:
+        conn, addr = server.accept()
+        thread = threading.Thread(target=handle_client, args=(conn, addr))
+        thread.start()
+        print(f"[ACTIVE CONNECTIONS] {threading.active_count() - 1}")
+
+
+print("[STARTING] server is starting...")
+start()

testserver.py

@@ -1,7 +1,7 @@
 import socket 
 import threading
 
-HEADER = 64
+HEADER = 1024
 PORT = 5000
 SERVER = socket.gethostbyname(socket.gethostname())
 ADDR = (SERVER, PORT)

testserverwithclass.py

@@ -17,15 +17,15 @@ class MyClass():
 
         connected = True
         while connected:
-            msg_length = conn.recv(HEADER).decode(FORMAT)
+            msg_length = conn.recv(self.HEADER).decode(self.FORMAT)
             if msg_length:
                 msg_length = int(msg_length)
-                msg = conn.recv(msg_length).decode(FORMAT)
+                msg = conn.recv(msg_length).decode(self.FORMAT)
-                if msg == DISCONNECT_MESSAGE:
+                if msg == self.DISCONNECT_MESSAGE:
                     connected = False
 
                 print(f"[{addr}] {msg}")
-                conn.send("Msg received".encode(FORMAT))
+                conn.send("Msg received".encode(self.FORMAT))
         conn.close()