PythonTCP網絡編程及應用

1、TCP服務端的創建

import socket

# 創建tcp套接字
sockfd = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# 綁定地址
sockfd.bind(('0.0.0.0', 6663))
# 設置監聽
sockfd.listen(2)
# 等待客戶端連接
while True:
    print('Waiting for connect.....')
    try:
        connfd, addr = sockfd.accept()
        print('Connect from {0}'.format(addr))
    except KeyboardInterrupt as e:
        break
    # 收消息
    while True:
        data = connfd.recv(5)
        if not data:
            break
        print("接受到來自{0}的{1}".format(addr, data.decode()))
        # 發信息
        num = connfd.send(b'Thanks')
        print('Send {0} bytes'.format(num))
    # 關閉連接
    connfd.close()
sockfd.close()

2、TCP客戶端的創建

import socket
sockfd = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# 連接服務器
sockfd.connect(('127.0.0.1', 8888))
print('連接到服務端...')
# 收發信息
while True:
    msg = input('>>')
    if msg == '':
        break
    num = sockfd.send(msg.encode())
    data = sockfd.recv(1024)
    print('from  server:{0}'.format(data.decode()))
sockfd.close()

3、TCP的應用—文件上傳

"""
文件上傳服務端
"""
import socket
sockdf = socket.socket()
sockdf.bind(('0.0.0.0', 8888))
sockdf.listen(5)
print('Waiting for connect.....')
connfd, addr = sockdf.accept()
print('Connect from {0}'.format(addr))
filename = connfd.recv(1024).decode()
f = open('/home/xiaohuo/PycharmProjects/Project/Network_programming/'+filename, 'wb')
while True:
    data = connfd.recv(1024)
    if data == b'ok':
        break
    f.write(data)
f.close()
connfd.close()
sockdf.close()

"""
文件上傳客戶端
"""
import socket, time

sockdf = socket.socket()
sockdf.connect(('127.0.0.1', 8888))

filename = input('file_dir:')
f = open(filename, 'rb')
sockdf.send((filename.split('/')[-1]).encode())
while True:
     data = f.read(1024)
     if not data:
         time.sleep(0.1)
         sockdf.send('ok'.encode())
         break
     sockdf.send(data)

f.close()
sockdf.close()