Python--网络编程-----socket代码实例

一、基本socket例子

服务端：

import socket

HOST = ''
PORT = 50007

sock_server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock_server.bind((HOST, PORT))

sock_server.listen(1)
conn, addr = sock_server.accept()

with conn:
    print('Connected by', addr)
    while True:
        data = conn.recv(1024)
        if not data:
            break
        conn.sendall(data)

客户端：

import socket

HOST = 'localhost'
PORT = 50007

client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client.connect((HOST, PORT))
client.sendall(b'Hello, world')

data = client.recv(1024)

print('Received', data)

先运行服务端，再运行客户端，客户端运行结果为：

Received b'Hello, world'

二、循环收发数据

服务端：

import socket

HOST = ''
PORT = 50007

sock_server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock_server.bind((HOST, PORT))

sock_server.listen(1)
conn, addr = sock_server.accept()

with conn:
    print('Connected by', addr)
    while True:
        data = conn.recv(1024)
        print("server recv:", conn.getpeername(), data.decode())
        if not data:
            break
        conn.sendall(data)

客户端：

import socket

HOST = 'localhost'
PORT = 50007

client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client.connect((HOST, PORT))

while True:
    msg = input(">>>:").strip()
    if len(msg) == 0:
        continue
    client.sendall(msg.encode())

    data = client.recv(1024)

    print('Received', data.decode())

先运行服务端，在运行客户端，依次在客户端输入：

hi、你好、学习python，

客户端运行结果为：

>>>:hi
Received hi
>>>:你好
Received 你好
>>>:学习python
Received 学习python
>>>:

服务端运行结果为：

Connected by ('127.0.0.1', 57473)
server recv: ('127.0.0.1', 57473) hi
server recv: ('127.0.0.1', 57473) 你好
server recv: ('127.0.0.1', 57473) 学习python

三、简单聊天软件

服务端

import socket

HOST = ''
PORT = 50007

sock_server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock_server.bind((HOST, PORT))

sock_server.listen(1)
conn, addr = sock_server.accept()

with conn:
    print('Connected by', addr)
    while True:
        data = conn.recv(1024)
        print("server recv:", conn.getpeername(), data.decode())
        if not data:
            break

        response = input(">>>:").strip()
        conn.send(response.encode())
        print("send to alex:", response)

客户端

import socket

HOST = 'localhost'
PORT = 50007

client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client.connect((HOST, PORT))

while True:
    msg = input(">>>:").strip()
    if len(msg) == 0:
        continue
    client.sendall(msg.encode())

    data = client.recv(1024)

    print('Received', data.decode())

先运行服务端，再运行客户端，

客户端运行结果为：

>>>:Hi
Received hey
>>>:刚强
Received alex
>>>:egon在吗
Received 不在
>>>:哈哈
Received 哈哈
>>>:

服务端运行结果为：

Connected by ('127.0.0.1', 57682)
server recv: ('127.0.0.1', 57682) Hi
>>>:hey
send to alex: hey
server recv: ('127.0.0.1', 57682) 刚强
>>>:alex
send to alex: alex
server recv: ('127.0.0.1', 57682) egon在吗
>>>:不在
send to alex: 不在
server recv: ('127.0.0.1', 57682) 哈哈
>>>:哈哈
send to alex: 哈哈

可以看出吗，以上代码能够实现简单的聊天功能