fixed bugs

client.py

@@ -55,6 +55,20 @@ def term_size():
 def print_white(text=""):
     print(wit + text + reset)
 
+def recv_json(sock):
+    """Veilig JSON ontvangen, ook bij grote berichten."""
+    buffer = b""
+    while True:
+        part = sock.recv(4096)
+        if not part:
+            break
+        buffer += part
+        try:
+            return json.loads(buffer.decode("utf-8"))
+        except json.JSONDecodeError:
+            continue
+    return {}  # fallback, lege dict als niks lukt
+
 def login():
     base_dir = Path(__file__).parent
     passwd_file = base_dir / "passwd.json"
@@ -98,8 +112,7 @@ while not current_user:
     w, _ = term_size()
     print(blauw_bg + wit + "Terminal Chat ".center(w) + reset)
     print()
-    
-    print( groen + "========================================")
+    print(groen + "========================================")
     print("     Welcome to the Terminal Chat")
     print("========================================" + reset)
     print()
@@ -123,8 +136,7 @@ except Exception as e:
     print("Connection failed:", e)
     exit()
 
-data = s.recv(4096)
-chat_data = json.loads(data.decode("utf-8"))
+chat_data = recv_json(s)
 chat_names = list(chat_data.keys())
 
 def draw_chat_window(messages, chatname):
@@ -143,42 +155,32 @@ def draw_chat_window(messages, chatname):
     print("-" * w)
 
 def chat_session(chatkeuze):
-    global chat_messages
-    global chat_users
-
+    global chat_messages, chat_users
     s.sendall(json.dumps({"action": "openchat", "chat_name": chatkeuze}).encode("utf-8"))
-    data = s.recv(4096)
-    chat_data = json.loads(data.decode("utf-8"))
+    chat_data = recv_json(s)
 
     if chatkeuze in chat_data:
         chat_messages = chat_data[chatkeuze].get("messages", [])
         chat_users = chat_data[chatkeuze].get("users", [])
 
     def receive_messages(sock):
-        global chat_messages
-        global chat_users
-
+        global chat_messages, chat_users
         while True:
             try:
-                data = sock.recv(4096)
-                if not data:
+                decoded = recv_json(sock)
+                if not decoded:
                     break
 
-                decoded = json.loads(data.decode("utf-8"))
-
-                # /users response
                 if isinstance(decoded, dict) and decoded.get("type") == "users_list":
                     users = decoded.get("users", [])
                     print("\nUsers:", ", ".join(users))
                     print(wit + "> " + reset, end="", flush=True)
                     continue
 
-                # normale chat update
                 if isinstance(decoded, dict) and chatkeuze in decoded:
                     with lock:
                         chat_messages = decoded[chatkeuze].get("messages", [])
                         chat_users = decoded[chatkeuze].get("users", [])
-
                     draw_chat_window(chat_messages, chatkeuze)
                     print(wit + "> " + reset, end="", flush=True)
 
@@ -238,8 +240,7 @@ while True:
     if keuze.isdigit() and int(keuze) == len(chat_names)+1:
         nieuwe_chat = input("Name of new chat: ")
         s.sendall(json.dumps({"action": "new_chat", "chat_name": nieuwe_chat}).encode("utf-8"))
-        data = s.recv(4096)
-        chat_data = json.loads(data.decode("utf-8"))
+        chat_data = recv_json(s)
         chat_names = list(chat_data.keys())
     elif keuze.isdigit() and 1 <= int(keuze) <= len(chat_names):
         chatkeuze = chat_names[int(keuze)-1]