python3 tcp黏包情况一

客户端没有及时接收缓冲区的包，造成多个包接收（服务端发送了一段数据，客户端只收了一小部分，客户端下次再收的时候还是从缓冲区拿上次遗留的数据，产生粘包）

-------------------------------------------tcp_stickybag_server.py-------------------------------------------
# coding:utf-8
import socket
import subprocess

tcp_server = socket.socket()
ip_port = ("127.0.0.1", 8001)
tcp_server.bind(ip_port)
tcp_server.listen(5)

while 1:
    conn, addr = tcp_server.accept()
    from_client_msg = conn.recv(1024)
    print("来自客户端的消息:", from_client_msg.decode("utf-8"))
    res = subprocess.Popen(
        from_client_msg.decode("utf-8"),
        shell=True,
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE,
    )
    conn.send(res.stdout.read())

conn.close()
tcp_server.close()

-------------------------------------------tcp_stickybag_client.py-------------------------------------------

# coding:utf-8
import socket

tcp_client = socket.socket()
ip_port = ("127.0.0.1", 8001)
tcp_client.connect(ip_port)

while 1:
    client_input = input("cmd指令1>>>:").strip()  # 可以输入dir 或 ipconfig等等
    tcp_client.send(client_input.encode("utf-8"))
    from_server_msg = tcp_client.recv(1024)
    print("来自服务端的消息:", from_server_msg.decode("gbk"))

tcp_client.close()

这种情况,可以尝试调大一次接收数据的最大大小,获取缓存区的大小,方法如下:

# coding:utf-8
import socket

tcp_client = socket.socket()
ip_port = ("127.0.0.1", 8001)
tcp_client.connect(ip_port)
bufsize = tcp_client.getsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF)

while 1:
    client_input = input("cmd指令1>>>:").strip()
    tcp_client.send(client_input.encode("utf-8"))
    from_server_msg = tcp_client.recv(bufsize)
    print("来自服务端的消息:", from_server_msg.decode("gbk"))

tcp_client.close()