pthon3环境下利用socket实现server，client交互实例

采帅哥| 2018-12-22 17:50 阅读 780 评论 0

1、实例要求

使用socket实现一个基于C/S架构的通信程序

（1）客户端发送给服务器请求，发送表征身份的用户名和密码(“admin”,“123456”)；

（2）服务器根据客户端发来的信息验证身份，如果验证错误，返回“refuse”字符串,并且断开连接信道；

（3）如果通过身份验证，服务器向客户端返回“accept”字符串；

（4）客户端在收到“accept”后，发送服务请求号，“1”表示请求文件传输服务，“2”表示请求数据库查询服务；

（5）服务器收到服务请求号后，用打印语句来模拟服务的动作，完成后返回“finish”字符串；

（6）客户端收到“finish”串后，向服务器端发送“byebye”,终止连接；

（7）双方中断连接，关闭socket。

2、原理

https://baike.baidu.com/pic/socket/281150/0/d000baa1cd11728b45647b06cafcc3cec3fd2c4c?fr=lemma&ct=single#aid=0&pic=d000baa1cd11728b45647b06cafcc3cec3fd2c4c

3、方法

https://docs.python.org/3.6/library/socket.html#module-socket

4、代码块

socket_server.py

import socket

import threading

import time

server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

server_socket.bind(('127.0.0.1', 12345))

server_socket.listen(5)

print("Waiting for connection...")

def tcplink(sock, addr):

print('Accept new connection from %s:%s...' % addr)

sock.send(b'welcome!')

name = sock.recv(1024).decode('utf-8')

sname = str(name)

time.sleep(1)

psd = sock.recv(1024).decode('utf-8')

spsd = str(psd)

print("The loginname is %s has login, and loginpasswd is %s." % (sname, spsd))

if sname == "admin" and spsd == "123456":

msg1 = bytes('accept', encoding = 'utf-8')

time.sleep(1)

sock.send(msg1)

requ_num = sock.recv(1024)

print(requ_num)

ms3 = bytes('finsh', encoding = 'utf-8')

# print("ms3")

# print(str(ms3))

if str(requ_num) == "b'1'":

print('The operqtion is 1.')

file_op = bytes('Simulate the operation that file transfer!', encoding = 'utf-8')

time.sleep(1)

sock.send(file_op)

sock.send(ms3)

order1 = sock.recv(1024).decode('utf-8')

elif str(requ_num) == "b'2'":

print('The operqtion is 2.')

sql_op = bytes('Simulate the operation that sql select!', encoding = 'utf-8')

sock.send(sql_op)

sock.send(ms3)

order1 = sock.recv(1024)

# print("test:", str(order1))

if str(order1) == "byebye":

print("Server get byebye!stop conn.")

sock.close()

else:

pass

else:

msg2 = bytes('Refuse, plz check your loginname and passwd!', encoding = 'utf-8')

sock.send(msg2)

sock.close()

while True:

# data = sock.recv(1024)

time.sleep(1)

# if not data or data.decode('utf-8') == 'exit':

# break

break

sock.close()

print('Connection from %s:%s closed.' % addr)

print("****over**** ")

n = 0#loginer

while True:

sock, addr = server_socket.accept()

# 创建新线程来处理TCP连接:

new_t = threading.Thread(target = tcplink, args=(sock, addr))

new_t.start()

n = n + 1

print("Here are %d loginer." % n)

socket_client.py

import socket

import time

client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

client_socket.connect(('127.0.0.1', 12345))

print(client_socket.recv(1024).decode('utf-8'))

name = input('Plz input your loginname:')

bname = bytes(name, encoding = 'utf-8')

psd = input('Plz input your passward:')

bpsd = bytes(psd, encoding = 'utf-8')

client_socket.send(bname)

time.sleep(1)

client_socket.send(bpsd)

order1 = client_socket.recv(1024).decode('utf-8')

print(order1)

time.sleep(1)

if order1 =='accept':

requests_ser_num = input("operation('1'表示请求文件传输服务, '2'表示请求数据库查询服务):")

b_requests_ser_num = bytes(requests_ser_num, encoding = 'utf-8')

client_socket.send(b_requests_ser_num)

op = client_socket.recv(1024).decode('utf-8')

print(op)

order2 = str(client_socket.recv(1024).decode('utf-8'))

print("Receive the server's order: %s ." % (order2))

if str(order2) == "finsh":

ms1 = bytes('byebye', encoding='utf-8')

print('Send the order "byebye" to server.')

client_socket.send(ms1)

# client_socket.send(b'exit')

client_socket.close()

else:

pass

else:

client_socket.close()

如有不对，请您指出。

---------------------

作者：Ff俯仰之间

原文：https://blog.csdn.net/Axiaobai12138/article/details/84785496

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pthon3环境下利用socket实现server，client交互实例

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