python 筆記 之 socket

'''
服務端
'''
import time

'''
socket.AF_INET      ipv4
socket.AF_INET6     ipv6

socket.SOCK_STREAM   流式，tcp
socket.SOCK_DGRAM    數據報，udp
'''

import socket
# 建立鏈接
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
# 地址（IP，port）
#add = ('120.79.36.170',6666)
add = ('127.0.0.1',6666)
# 綁定地址，地址必須是元祖
s.bind(add)
# 監聽，同時接受的socket數量
s.listen(10)
print("server is running ...")
while 1:
    try:
        # 接受鏈接，conn新的套接字，addr客戶端地址
        conn,addr = s.accept()
        while 1:
            # 接收數據，參數接收的大小
            data = conn.recv(2048)
            if data == b'exit':
                conn.close()
            print("RECV:{0}".format(data))
            # 發送數據
            conn.sendall(data.upper())
    except Exception as e:
        conn.close()

 

'''
客戶端
'''
import socket

# 建立鏈接
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# 地址（IP，port）
add = ('127.0.0.1', 6666)
s.connect(add)
flage = 1
while flage:
    word = input("word:")
    if word == "exit":
        flage = 0
    if word == "":
        continue
    # 發送數據
    s.sendall(word.encode("utf-8"))
    data = s.recv(2048)
    print("RECV:{0}".format(data))