python3 tcp的粘包现象和解决办法解析

import socket
sk = socket.socket()
sk.bind(("127.0.0.1", 6666))
sk.listen()
conn, address = sk.accept()
def my_send(msg):
  bs = msg.encode("utf-8")
  len_str = format(len(bs), "04d") # 定长4位
  conn.send(len_str.encode("utf-8"))
  conn.send(bs)
my_send(input(">:").strip())
my_send(input(">:").strip())

import socket
import time

sk = socket.socket()
sk.connect(("127.0.0.1", 6666))

time.sleep(10) # 制造粘包情况
msg = sk.recv(1024).decode("utf-8") # 粘包现象
print(msg)

0004aaaa0003bbb

import socket
import time
sk = socket.socket()
sk.connect(("127.0.0.1", 6666))
time.sleep(10)
def my_recv():
  len_str = int(sk.recv(4).decode("utf-8"))
  msg = sk.recv(len_str)
  print(f"来自服务端的消息：{msg.decode('utf-8')}")
my_recv()
my_recv()

来自服务端的消息：aaaa
来自服务端的消息：bbb