What is a Socket?
Socket, also known as "socket", the application program usually through the "socket" to the network to send requests or answer network requests, so that the host or a computer process can communicate between.
python create socket
([family[, type[, proto]]])
Parameter parsing:
family: AF_UNIX (for cross-machine communication) or AF_INET(IPv4) (for local communication)
type: type of socket, can be classified as SOCK_STREAM(TCP) or SOCK_DGRAM(UDP) depending on whether it is connection oriented or non-connection.
protocol: Default is 0.
Client code: udp_client.py
Step 1: Import the socket module and create sockets
import socket u_client = (socket.AF_INET, socket.SOCK_DGRAM)
Step 2: Start communication
# () Returns the socket's own address.
print("%s:%s Start working" %u_client.getsockname())
while True:
# Send data
data = input("input>>>")
u_client.sendto(('utf-8'), ("localhost", 8887))
# Exit system operations
if data == 'exit':
break
# Receive data
data, addr = u_client.recvfrom(1024)
print("Source of information received by the client: %s:%s" %addr)
print("Client received message data: %s" %('utf-8'))
Step 3: Close the socket
u_client.close()
Server-side code: udp_server.py
Step 1: Import the socket module and create sockets
import socket u_server = (socket.AF_INET, socket.SOCK_DGRAM)
Step 2: Start communication
# Bind ports
u_server.bind(('localhost', 8887))
print("%s:%s Start working" %u_server.getsockname())
while True:
# Receive data
# u_server.recvfrom() receive UDP data, return value is (data,address)
data, addr = u_server.recvfrom(1024)
print("Source of incoming message: %s:%s" %addr)
print("Received message data: %s" %('utf-8'))
# Send original address data
send_data = ("Data received:"+('utf-8')+" --Thanks").encode('utf-8')
u_server.sendto(send_data, addr)
# Exit system operations
if(('utf-8') == 'exit'):
break
Step 3: Close the socket
u_server.close()
Test results
Create two new cmd windows, divided into executing client-side and server-side code
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