python监听网页接口请求次数 python socket 监听

socket基础知识

1.简单的例程试水：单纯的实现了客户端连接服务器

#服务器
import socket
s = socket.socket()

#获取本机主机名
host = socket.gethostname()#本机ipv4地址
port = 2222 #端口号

s.bind((host, port))#绑定地址

s.listen(5)#TCP监听；数量是客户端的最大连接数
while True:
    clientsocket, addr = s.accept()#被动接受TCP客户端连接,(阻塞式)等待连接的到来
    print('Got connection from', addr)
    msg='Thank you for connecting...'
    clientsocket.send(msg.encode('utf-8'))
    clientsocket.close()

#客户端
import socket
s = socket.socket()

host = socket.gethostname()
port = 2222

s.connect((host, port))#连接主机和端口

msg = s.recv(1024)

print(msg.decode('utf-8'))

2.客户端一直发送消息

#服务器
#服务器
import socket
s = socket.socket()
 

host = socket.gethostname()
port = 1234
 
s.bind((host, port))
 
s.listen(5)

clientsocket, addr = s.accept()
print('Got connection from', addr)
msg='Thank you for connecting...'
clientsocket.send(msg.encode('utf-8'))
    
while True:
    
    data = clientsocket.recv(1024)
    if data.decode('utf-8')=='exit':
        print('connection closed')
        break;
    print('client send data is:',data.decode('utf-8'))
    
clientsocket.close()

#客户端
#客户端
import socket
s = socket.socket()
 
host = socket.gethostname()
port = 1234
 
s.connect((host, port))#连接主机和端口
 
msg = s.recv(1024)
print(msg.decode('utf-8'))

while True:
    data = input('please input:')
    s.send(data.encode())
    if data=='exit':
        print('connection closed')
        break

运行结果：

3.客户端和服务器相互发送消息

#服务器
import socket
s = socket.socket()
 

host = socket.gethostname()
port = 1234
 
s.bind((host, port))
 
s.listen(5)

clientsocket, addr = s.accept()
print('Got connection from', addr)
msg='Thank you for connecting...'
clientsocket.send(msg.encode('utf-8'))
    
while True:

    data = clientsocket.recv(1024).decode('utf-8')#服务器接收
    if data=='exit':
        print('connection closed')
        break;
    print('client send data is:',data)
    
    msg = input("server input:")#服务器发送
    if len(msg)==0:
        continue
    clientsocket.send(msg.encode('utf-8'))
    
clientsocket.close()

#客户端
import socket
s = socket.socket()
 
host = socket.gethostname()
port = 1234
 
s.connect((host, port))#连接主机和端口
 
msg = s.recv(1024)
print(msg.decode('utf-8'))

while True:
    data = input('please input:')#客户端发送
    s.send(data.encode())
    if data=='exit':
        print('connection closed')
        break
    
    msg = s.recv(1024).decode('utf-8')#客户端接收
    if not msg:
        continue
    print('server send data is:',msg)

运行结果：

不过，与一个致命的问题，input这个会一直等待输入，只有你在控制台这里输入内容并回车后才可以显示TCP工具发送的数据，因为input这个方法是线程阻塞的，如果想实现实时收发，需要使用多线程，一个线程接收，一个线程发送；

4.客户端和服务器相互发信息：

开多线程：天哪：鬼知道为什么python shell会不行，找了一天毛病，还是会卡在input阻塞上：记住：一定在cmd中运行：一定在cmd中运行：一定在cmd中运行！！！！

#服务器
import socket
from time import sleep
import threading
 
s = socket.socket()
 
 
host = socket.gethostname()
port = 1234
 
s.bind((host, port))
 
s.listen(5)
 
clientsocket, addr = s.accept()
print('Got connection from', addr)
msg='Thank you for connecting...'
clientsocket.send(msg.encode('utf-8'))
 
def recvData():
    while True:
        data = clientsocket.recv(1024).decode('utf-8')#服务器接收
        if data=='exit':
            print('connection closed')
            break;
        print('client send data is:',data)
        s.close()
        

if __name__ == '__main__':

    t1 = threading.Thread(target=recvData)
    t1.start()
    
    while True:
        msg = input("")#服务器发送
        if len(msg)==0:
            continue
        clientsocket.send(msg.encode('utf-8'))
        if msg=='exit':
            break;
    clientsocket.close()

#客户端
import socket
from time import sleep
import threading
 
s = socket.socket()
 
host = socket.gethostname()
port = 1234
 
s.connect((host, port))#连接主机和端口
 
msg = s.recv(1024)
print(msg.decode('utf-8'))


def recvData():
    while True:
        msg = s.recv(1024).decode('utf-8')#客户端接收
        if not msg:
            continue
        print('server send data is:',msg)
 
 
if __name__ == '__main__':

    t1 = threading.Thread(target=recvData)
    t1.start()
    while True:
       data = input('')#客户端发送
       s.send(data.encode())
       if data=='exit':
           print('connection closed')
           break
    s.close()

运行结果：

5.服务器作为中介：两个客户相互发消息

import socket
import threading

users = {}#用户字典，也可以链接数据库

def run(ck,ca):
    userName = ck.recv(1024).decode('utf-8')#用户发送的信息
    users[userName] = ck #解码并存储用户的信息
    print(userName,'已链接到服务器')

    while True:
        data = ck.recv(1024).decode('utf-8')
        s = data.split(':')#分割字符串得到发送的用户名和客户端发送的信息
        users[s[0]].send((userName+'说：'+s[1]).encode('utf-8'))#要发送信息的客户端，向目标客户端发送信息




def start():
    
    server = socket.socket()
    ipStr = socket.gethostname()
    portStr = 9846
    
    server.bind((ipStr, portStr))
    
    #2:bind()的参数是一个元组的形式
    server.listen(10)#设置监听，和设置连接的最大的数量
    
    print("服务器启动成功")

    while True:
        ck, ca = server.accept()#接受所连接的客户端的信息
        # 其中ca是ip和端口号组成的元组，ck有关客户端的信息
        t = threading.Thread(target=run, args=(ck, ca))#每连接一个客户端就开启一个线程
        #其中Thread函数中的传入函数的参数也是以元组的形式
        t.start()#开启线程


s = threading.Thread(target=start)#启用一个线程开启服务器
s.start()#开启线程

import socket
import threading

ck=None

def getInfo():
    while True:
        data = ck.recv(1024).decode('utf-8')#用于接受服务其发送的信息
        print(data)


#客户1
def connectServer():
    global ck

    client  = socket.socket()
    
    ipStr = socket.gethostname()
    portStr = 9846
    username = 'client1'
    
    client.connect((ipStr,portStr))

    client.send(username.encode('utf-8'))
    ck = client

    t=threading.Thread(target = getInfo)
    t.start()


def sendMail(msg):
    
    sendStr = 'client2' + ":" + msg
    ck.send(sendStr.encode("utf-8"))

if __name__ == "__main__":
    connectServer();
    while True:
        msg = input('')
        sendMail(msg);

#客户2
import socket
import threading

ck=None

def getInfo():
    while True:
        data = ck.recv(1024).decode('utf-8')#用于接受服务其发送的信息
        print(data)



def connectServer():
    global ck

    client  = socket.socket()
    
    ipStr = socket.gethostname()
    portStr = 9846
    username = 'client2'
    
    client.connect((ipStr,portStr))

    client.send(username.encode('utf-8'))
    ck = client

    t=threading.Thread(target = getInfo)
    t.start()


def sendMail(msg):
    
    sendStr = 'client1' + ":" + msg
    ck.send(sendStr.encode("utf-8"))

if __name__ == "__main__":
    connectServer();
    while True:
        msg = input('')
        sendMail(msg);

运行结果：