Update app.py

app.py

@@ -1,36 +1,21 @@
 # app.py
-import os, socket, threading, sys
+import os,socket,threading,sys
 
-host = "0.0.0.0"
-port = int(os.getenv("PORT", "5678"))
+port=int(os.getenv("PORT","5678"))
+print("echo tcp on",port,flush=True)
 
-print("listening on", host, port)
-print("hostname:", socket.gethostname())
-try:
-    print("local ips:", socket.gethostbyname_ex(socket.gethostname())[2])
-except Exception as e:
-    print("ip lookup error:", e)
-sys.stdout.flush()
+def handle(c,a):
+    print("conn",a,flush=True)
+    while (d:=c.recv(1024)):
+        print("recv",d.decode(errors="ignore").strip(),flush=True)
+        c.sendall(d)
+    c.close()
+    print("disc",a,flush=True)
 
-def handle_client(conn, addr):
-    print("client connected:", addr)
-    try:
-        while True:
-            data = conn.recv(1024)
-            if not data:
-                break
-            print("received:", data.decode(errors="ignore").strip())
-            conn.sendall(data)
-    except Exception as err:
-        print("error:", err)
-    finally:
-        conn.close()
-        print("client disconnected:", addr)
+s=socket.socket()
+s.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
+s.bind(("0.0.0.0",port))
+s.listen()
 
-with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as srv:
-    srv.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-    srv.bind((host, port))
-    srv.listen()
-    while True:
-        conn, addr = srv.accept()
-        threading.Thread(target=handle_client, args=(conn, addr), daemon=True).start()
+while True:
+    threading.Thread(target=handle,args=s.accept(),daemon=True).start()