我已经在客户端和服务器之间设置了一个tcp套接字,非常基本。客户端:
#!/usr/bin/env python3
import socket
# create a socket object
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# get local machine name
host = "81.88.95.250"
port = 25000
# connection to hostname on the port.
s.connect((host, port))
# Receive no more than 1024 bytes
msg = s.recv(1024)
s.close()
print (msg.decode('ascii'))
服务器端:
#!/usr/bin/env python3
import socket
# create a socket object
serversocket = socket.socket(
socket.AF_INET, socket.SOCK_STREAM)
# get local machine name
host = socket.gethostname()
port = 25000
# bind to the port
serversocket.bind((host, port))
# queue up to 5 requests
serversocket.listen(5)
while True:
# establish a connection
clientsocket,addr = serversocket.accept()
print("Got a connection from %s" % str(addr))
msg = 'Thank you for connecting'+ "\r\n"
clientsocket.send(msg.encode('ascii'))
clientsocket.close()
我的目标是从客户端向服务器发送通知,这很容易。困难的部分是,在某些情况下,我还需要从服务器启动连接并向客户端发送命令,并且必须在收到命令后立即执行该命令,因此我无法设置定期的“轮询”。但是我对此感到很困惑,因为客户端位于NAT后面,没有公开IP。