# socket """ 1、Socket also called " Socket ", Applications usually go through " Socket " Send a request to the network or answer a network request , To enable communication between hosts or processes on a computer . 2、server End ： Server side , Listen on the specified port , Provide services 3、client End ： client , Connect server , Access to services """
Server side
# Refer to the module
import socket
# initialization （ Instantiation ）socket object sk
sk = socket.socket()
# Define the binding IP port , Tuple format
address = ('127.0.0.1', 8088)
# binding IP port
sk.bind(address)
# Set the maximum number of connections
sk.listen(5)
# Initialize connection ,conn Get access to ,addr Get remote address , Has reached the awaited
"""
1、 After initializing the connection, it will enter the blocking state , Waiting for the connection
2、 After the client is connected, it can send and receive information through the channel
"""
# Print channel and remote address information
conn, addr = sk.accept()
print(conn)
print(addr)
# Sending and receiving information
"""
1、 Either the server or the client can send messages first
2、 It must be sent and received one time , Both ends cannot send or receive messages at the same time
"""
# Receiving information
"""
1、 Receive can specify the maximum number of bytes received at a time
2、 The information received is bytes type
3、 While waiting for reception , Go into blocking mode , Until the message is sent
4、 There is a size limit for receiving messages at one time , That is to say, it may not be able to receive all at once , It takes several times
5、 The client receives information using socket object sk, The server side uses channels conn
"""
info = str(conn.recv(1024), encoding='utf8')
print(info)
# Send a message
"""
1、 The sending message must be bytes type
2、send： send out TCP data , take string The data in is sent to the connected socket . The return value is the number of bytes to send , The quantity may be less than string Byte size of （ It is possible that the transmission is incomplete ）.
3、sendall： Send in full TCP data , Send in full TCP data . take string The data in is sent to the connected socket , But try to send all the data before returning . Successfully returns None, If you fail, throw an exception .
4、 The client sends information using socket object sk, The server side uses channels conn
"""
conn.sendall(bytes('hello too', encoding='utf8'))
# Close the connection
# The client is closed for use socket object sk, The server side uses channels conn
conn.close()client
# Introduce modules
import socket
# initialization （ Instantiation ）socket object sk
sk = socket.socket()
# Define the server side IP port , Tuple format
address = ('127.0.0.1', 8088)
# Connect to server
sk.connect(address)
# Sending and receiving information
"""
1、 Either the server or the client can send messages first
2、 It must be sent and received one time , Both ends cannot send or receive messages at the same time
"""
# Send a message
"""
1、 The sending message must be bytes type
2、send： send out TCP data , take string The data in is sent to the connected socket . The return value is the number of bytes to send , The quantity may be less than string Byte size of （ It is possible that the transmission is incomplete ）.
3、sendall： Send in full TCP data , Send in full TCP data . take string The data in is sent to the connected socket , But try to send all the data before returning . Successfully returns None, If you fail, throw an exception .
4、 The client sends information using socket object sk, The server side uses channels conn
"""
sk.sendall(bytes('hello', encoding='utf8'))
# Receiving information
"""
1、 Receive can specify the maximum number of bytes received at a time
2、 The information received is bytes type
3、 While waiting for reception , Go into blocking mode , Until the message is sent
4、 There is a size limit for receiving messages at one time , That is to say, it may not be able to receive all at once , It takes several times
5、 The client receives information using socket object sk, The server side uses channels conn
"""
info = str(sk.recv(1024), encoding='utf8')
print(info)
# Close the connection
# The client is closed for use socket object sk, The server side uses channels conn
sk.close()
