python - 客户端没有响应 - Python 中的多线程

Question

我正在尝试创建 2 个线程。一个将始终在监听，第二个将检查服务器是否在监听。

Host='127.0.0.1'
Port= 5555
threads=[]
threads2=[]

def server() :
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        s.bind((Host, Port)) 
        while 1:
            print("listen() ") 
            s.listen() 
            conn, address= s. accept() 
            with conn:
                print(" Connected by", address) 
                while True:

                   data=conn.recv(1024) 
                   print("from caller", representing(data)) 


def client () :
    s= socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
    try:
        s.bind(('127.0.0.1', 5555)) 
    except socket.error as e:
        if e.errno==errno.EADDRINUSE:
            print("port in use") 
        else:
            print("connected")  
    s.close() 



served = threading.Thread(target=server) 
threads.append(served) 
served.start() 
print("started the server thread") 
time.sleep(2) 
click =threading.Thread(target=client) 
threads2.append(click) 
click.start() 
print("click started") 

我得到以下输出

started the server thread
listen() 
click started

在此之后它没有显示任何内容。

Answer 1

您正在尝试在服务器和客户端中绑定(bind) 套接字。您只能绑定(bind) 一次。 (参见 Python documentation on this。

相反，对于客户端，您应该使用connect:

def client () :
    s= socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
    try:
        # use s.connect instead of s.bind
        s.connect(('127.0.0.1', 5555)) 
    except socket.error as e:
        if e.errno==errno.EADDRINUSE:
            print("port in use") 
        else:
            print("connected")  
    s.close()