网络通信_socket

socket又称套接字

使用server实现循环通信代码如下

import socket
server = socket.socket()
server.bind(('192.168.16.33',8000))
server.listen(5)
while 1:
    coon,addr = server.accept()
    while 1:
        ret = coon.recv(1024).decode('utf-8')
        print(ret)
        msg = input('内容:').encode('utf-8')
        coon.send(msg)
    coon.close()

server.close()

客户端如下

import socket
client = socket.socket()
client.connect(('192.168.16.33',8000))
while 1:
    msg = input('>>>')
    client.send(msg.encode('utf-8'))
    ret = client.recv(1024).decode('utf-8')
    print(ret)
client.close()

使用socketserver可以实现并发通信

import socketserver
class MY_server(socketserver.BaseRequestHandler):
    def handle(self):
        ret = self.request.recv(1024).decode('utf-8')
        print(ret)

if __name__ == '__main__':
    ip = ('127.0.0.1',8000)
    server = socketserver.ThreadingTCPServer(ip,MY_server)

使用socket实现通信效果很容易造成黏包现象

产生黏包现象需要用struct和josn序列化的方式来解决,

import struct
import subprocess
import socket
server = socket.socket()
server.bind(('127.0.0.1',8000))
server.listen(5)
coon,addr = server.accept()
cmd = coon.recv(1024).decode('utf-8')
print(cmd)
obj = subprocess.Popen(cmd,shell= True,stderr=subprocess.PIPE,stdout=subprocess.PIPE)
right_obj = obj.stdout.read()
error_obj = obj.stderr.read()
date_beyes = len(right_obj + error_obj)
print(date_beyes)
struct_date_beyes = struct.pack('i',date_beyes)
print(struct_date_beyes)
coon.send(struct_date_beyes)
coon.send(right_obj +error_obj)

import socket
import struct
client = socket.socket()
client.connect(('127.0.0.1',8000))
cmd = input('>>>').encode('utf-8')
client.send(cmd)
beyes_struct_len = client.recv(4)
print(beyes_struct_len)
beyes_struct_ = struct.unpack('i',beyes_struct_len)[0]
date = b''
while len(date) < beyes_struct_:
    form_date = client.recv(1024)
    date += form_date
print(date.decode('gbk'))

上图是解决黏包现象的客户端和服务端代码

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