python module --socket

Example one,

server:
　　#socket socket (IP + port number) (qq, wechat message transmission relies on the socket module), CS architecture
Import socket
server socket.socket = ()
　　# instantiates a socket object, the default tcp / ip protocol
server .bind (( "127.0.0.1", 8888))
　　# bind client, VIP, tuples form, ( '') is equivalent to ( '0.0.0.0')
　　# declared the end of the visit the client address and port number
server.listen (. 5)
　　# semijoin pool, listen (5) the maximum number of connections
Print ( 'the wait Telephone ..........')
() Conn, addr = server.accept
　　# listen for client connecting
　　# operation produces two return value: connection information, client information
Print ( '............ Telephone Call')
Data = conn.recv (10240)
　　# to the received information. 10240: Maximum acceptable bytes just write '
Print (data.decode (' UTF-. 8 '))

client：
importsocket
client=socket.socket()
client.connect(('127.0.0.1',8888))
cmd=input('==>:')
client.send(cmd.encode('utf-8')) 

result:

 

 

Example 2,

Using the subprocess module and socket module executes the command cmd in other hosts:

server：
import socket,subprocess
server = socket.socket()
server.bind(('127.0.0.1',8888))
server.listen(5)
print('wait telephone..........')
conn,addr = server.accept()
print('call telephone............')
while True:
    cmd = conn.recv(10240)
    process = subprocess.Popen(cmd.decode('utf-8'),
                               shell=True,
                               stdout=subprocess.PIPE,
                               stderr=subprocess.PIPE
                               )
    stdout=process.stdout.read()
    stderr=process.stderr.read()
    result = stdout+stderr
    conn.send(result)

client：
import socket
client = socket.socket()
client.connect(('127.0.0.1',8888))
while True:
    cmd = input('==>:').strip()
    if cmd:
        client.send(cmd.encode('utf-8'))
    else:
        continue
    result = client.recv(10240)
    print(result.decode('gbk'))

　result:　

 

Example 3,

Simple chat software (first two machines to establish communication using the socket, and then make use of multi-threading to send and receive messages while running.)

server：
import socket,threading
server = socket.socket()
server.bind(('127.0.0.1',8888))
server.listen(5)
print('wait telephone..........')
conn,addr = server.accept()
print('call telephone............')
def recv():
    while True:
        data = conn.recv(1024)
        print(data.decode('utf-8'))
def send():
    while True:
        cmd = input('==>:')
        conn.send(cmd.encode('utf-8'))
t1 = threading.Thread(target=recv)
t2 = threading.Thread(target=send)
t1.start()
t2.start()


client：
import socket,threading
client = socket.socket()
client.connect(('127.0.0.1',8888))
def send():
    while True:
        cmd = input('==>:').strip()
        client.send(cmd.encode('utf-8'))
def recv():
    while True:
        data = client.recv(1024)
        print(data.decode('gbk'))

t1 = threading.Thread(target=recv)
t2 = threading.Thread(target=send)
t1.start()
t2.start()

　result:

　

 

Example 4,

Check the IP address and port number through the barrier:

Socket Import 
the hosts = [ '192.168.254.12:80','192.168.254.12:3306','2.2.2.2:80','3.3.3.3:80'] 
socket.setdefaulttimeout (. 1) 

for the hosts in Host: 
    IP = host.split ( ':') [0] 
    Port = host.split ( ':') [. 1] 
    Server socket.socket = () 
    res = server.connect_ex ((IP, int (Port))) 
    # if res is 0 represents ok, the connection is not 0 for failure 
    : IF RES == 0 
        Print ( '% S iS OK'% IP) 
    the else: 
        Print ( '% S iS not OK'% IP) 


Import Socket 
socket.setdefaulttimeout (. 1) # timeout 
host_list = [ '192.168.4.145:5555','192.168.4.146:555','192.168.4.147:5555','192.168.31.199:445'] 
for host_list info in:
    server = socket.socket()
    re.compile = ip ( '(*):.?. (*)'). Search (info) .group (1) 
    Port = re.compile ( '(*):.?. (*)'). Search (info) .group (2) 
    RES = server.connect_ex ((IP, int (port))) 
    IF RES == 0: 
        Print ( '% S -% S ports normal'% (IP, port)) 
    the else: 
        print ( '% s -% s port exception'% (ip, port))