利用Python打造一个多人聊天室的示例详解

import socket
import threading

num=0

def chat(service_client_socket,addr): 
    # 等待接收客户端消息存放在2个变量service_client_socket和addr里
    if not addr in user:  
        print('Accept new connection from %s:%s...' % addr)
        # 如果addr不在user字典里则执行以下代码
        for scs in serv_clie_socket: 
            serv_clie_socket[scs].send(data +' 进入聊天室...'.encode('utf-8'))  
            # 发送user字典的data和address到客户端
        user[addr] = data.decode('utf-8')  #data 是最新进入聊天室的客户，解压后放入user
        serv_clie_socket[addr] = service_client_socket #将服务器与服务器端口号为addr的套接字放入字典
        # 接收的消息解码成utf-8并存在字典user里,键名定义为addr
    #print("可以开始聊天了>>>>>>")       
    # 如果addr在user字典里，跳过本次循环
    while True:
        d = service_client_socket.recv(1024)
        if (('EXIT'.lower() in d.decode('utf-8'))|(d.decode('utf-8') == 'error1')):
            #如果EXIT在发送的data里
            name = user[addr]   
            #user字典addr键对应的值赋值给变量name
            user.pop(addr) 
            serv_clie_socket.pop(addr)     
            #删除user里的addr
            for scs in serv_clie_socket:     
                #从user取出address
                serv_clie_socket[scs].send((name + ' 离开了聊天室...').encode('utf-8'))     
                #发送name和address到客户端
            print('Connection from %s:%s closed.' % addr)
            global num
            num = num-1
            break
        else: 
            print('"%s" from %s:%s' %(d.decode('utf-8'), addr[0], addr[1]))  
            for scs in serv_clie_socket:    
                #从user遍历出address
                if serv_clie_socket[scs] != service_client_socket:  
                    #address不等于addr时，执行下面的代码
                    serv_clie_socket[scs].send(d)     
                    #发送data到客户端

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  # 创建socket对象

addr = ('127.0.0.1', 9999)
s.bind(addr)  # 绑定地址和端口

s.listen(128)

print('tcp Server on', addr[0], ":",addr[1],"......")

user = {}  # 存放字典{addr:name}
serv_clie_socket = {} #存放{socket:不同线程的套接字}
while True:
    try:
        print("等待接收客户端的连接请求....")
        service_client_socket, addr = s.accept() # 等待接收客户端的连接请求
        print("接收到客户端的连接请求....")
    except ConnectionResetError:
        print('Someone left unexcept.')
    data = service_client_socket.recv(1024)
    if data.decode()=='error1':
        print(addr,"关闭了登录窗口。。。")
        continue
    print("data = ",data.decode())
    
         
    #为服务器分配线程
    num=num+1
    r = threading.Thread(target=chat, args=(service_client_socket,addr), daemon=True) 
    r.start()
    print("聊天室人数：",num)

#客户端
import tkinter
from tkinter import font
import tkinter.messagebox
import socket
import threading
import time

string=''
def my_string(s_input):
    string = s_input.get()

def Send(sock):
    '''
        发送数据的方法
        参数：
            sock：定义一个实例化socket对象
            server：传递的服务器IP和端口
    '''
    if string!='':
        message = name + ' : ' + string
        data = message.encode('utf-8')
        sock.send(data)
        if string.lower() == 'EXIT'.lower():
            exit()


def recv(sock):
    sock.send(name.encode('utf-8'))
    while True:
        data = sock.recv(1024)
        #加一个时间戳
        time_tuple = time.localtime(time.time())
        str = ("{}点{}分".fORMat(time_tuple[3],time_tuple[4]))
        rrecv = tkinter.Label(t,text=data.decode('utf-8'),width=40,anchor='w',bg='pink')#接收的消息靠左边
        rrecv.pack()

def left():
    global string
    string = rv1.get()
    Send(s)
    if string!='':
        rleft = tkinter.Label(t,text=string,width=40,anchor='e')#发送的消息靠右边
        rleft.pack()
        rv1.set('')

def Creat():
    global name
    name = n.get()
    
    #接收进程
    tr = threading.Thread(target=recv, args=(s,), daemon=True)
    # daemon=True 表示创建的子线程守护主线程，主线程退出子线程直接销毁
    tr.start()
     
    l.destroy()
    e.destroy() 
    b.destroy()
    t.title("聊天室")
    t.geometry("500x600")
    rL0 = tkinter.Label(t,text='%s的聊天室'%name,width=40)
    rL0.pack()
    rL1 = tkinter.Label(t,text='请输入消息：',width=20, height=1)
    rL1.place(x=0,y=450)
    rE1 = tkinter.Entry(t, textvariable = rv1)
    rE1.place(x=200,y=450) 
    rB1 = tkinter.Button(t, text="发送",command=left)  
    rB1.place(x=380,y=450)
    #发送进程

def JieShu():
    tkinter.messagebox.showwarning(title='你确定退出吗？', message='刚才你点击了关闭按钮')
    s.send("error1".encode('utf-8'))
    exit(0)   
    
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)    
server = ('10.100.207.40', 9999)
s.connect(server)#建立连接
t=tkinter.Tk()
t.title("多人聊天室")
t.geometry("300x200+500+200")
l = tkinter.Label(t,text='多人聊天室欢迎您，请输入你的名称',width=40, height=8)
l.pack()
n = tkinter.StringVar()
e = tkinter.Entry(t, width=15,textvariable = n)
e.pack() 
rv1 = tkinter.StringVar()
name = n.get()

b = tkinter.Button(t, text="登录",width=40, height=10,command=Creat) 

b.pack()
t.protocol("WM_DELETE_WINDOW", JieShu)
t.mainloop()

s.close()