import socket
import threading
import queue
import json # json.dumps(some)打包  json.loads(some)解包
import os
import os.path
import sys


IP = '127.0.0.1'
PORT = 9999   # 端口
messages = queue.Queue()
users = []  # 0:userName 1:connection
lock = threading.Lock()

def onlines():  # 统计当前在线人员
  online = []
  for i in range(len(users)):
    online.append(users[i][0])
  return online

class ChatServer(threading.Thread):
  global users, que, lock

  def __init__(self):     # 构造函数
    threading.Thread.__init__(self)
    self.s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    os.chdir(sys.path[0])
# 接受来自客户端的用户名，如果用户名为空，使用用户的IP与端口作为用户名。如果用户名出现重复，则在出现的用户名依此加上后缀“2”、“3”、“4”……
  def receive(self, conn, addr):       # 接收消息
    user = conn.recv(1024)    # 用户名称
    user = user.decode()
    if user == '用户名不存在':
      user = addr[0] + ':' + str(addr[1])
    tag = 1
    temp = user
    for i in range(len(users)):   # 检验重名，则在重名用户后加数字
      if users[i][0] == user:
        tag = tag + 1
        user = temp + str(tag)
    users.append((user, conn))
    USERS = onlines()
    self.Load(USERS,addr)
    # 在获取用户名后便会不断地接受用户端发来的消息（即聊天内容），结束后关闭连接。
    try:
      while True:
        message = conn.recv(1024)      # 发送消息
        message = message.decode()
        message = user + ':' + message
        self.Load(message,addr)
      conn.close()
    # 如果用户断开连接，将该用户从用户列表中删除，然后更新用户列表。
    except:  
      j = 0      # 用户断开连接
      for man in users:
        if man[0] == user:
          users.pop(j)    # 服务器段删除退出的用户
          break
        j = j+1

      USERS = onlines()
      self.Load(USERS,addr)
      conn.close()

# 将地址与数据（需发送给客户端）存入messages队列。
  def Load(self, data, addr):
    lock.acquire()
    try:
      messages.put((addr, data))
    finally:
      lock.release()    

  # 服务端在接受到数据后，会对其进行一些处理然后发送给客户端，如下图，对于聊天内容，服务端直接发送给客户端，而对于用户列表，便由json.dumps处理后发送。
  def sendData(self): # 发送数据
    while True:
      if not messages.empty():
        message = messages.get()
        if isinstance(message[1], str):
          for i in range(len(users)):
            data = ' ' + message[1]
            users[i][1].send(data.encode())
            print(data)
            print('\n')

        if isinstance(message[1], list):
          data = json.dumps(message[1])
          for i in range(len(users)):
            try:
              users[i][1].send(data.encode())
            except:
              pass

  def run(self):
    self.s.bind((IP,PORT))
    self.s.listen(5)
    q = threading.Thread(target=self.sendData)
    q.start()
    while True:
      conn, addr = self.s.accept()
      t = threading.Thread(target=self.receive, args=(conn, addr))
      t.start()
    self.s.close()
if __name__ == '__main__':
  cserver = ChatServer()
cserver.start()

import socket
import tkinter
import tkinter.messagebox
import threading
import json
import tkinter.filedialog
from tkinter.scrolledtext import ScrolledText

IP = ''
PORT = ''
user = ''
listbox1 = '' # 用于显示在线用户的列表框
show = 1 # 用于判断是开还是关闭列表框
users = [] # 在线用户列表
chat = '------Group chat-------' # 聊天对象

#登陆窗口

root0 = tkinter.Tk()
root0.geometry("300x150")
root0.title('用户登陆窗口')
root0.resizable(0,0)
one = tkinter.Label(root0,width=300,height=150,bg="LightBlue")
one.pack()

IP0 = tkinter.StringVar()
IP0.set('')
USER = tkinter.StringVar()
USER.set('')

labelIP = tkinter.Label(root0,text='IP地址',bg="LightBlue")
labelIP.place(x=20,y=20,width=100,height=40)
entryIP = tkinter.Entry(root0, width=60, textvariable=IP0)
entryIP.place(x=120,y=25,width=100,height=30)

labelUSER = tkinter.Label(root0,text='用户名',bg="LightBlue")
labelUSER.place(x=20,y=70,width=100,height=40)
entryUSER = tkinter.Entry(root0, width=60, textvariable=USER)
entryUSER.place(x=120,y=75,width=100,height=30)

def Login(*args):
	global IP, PORT, user
	IP, PORT = entryIP.get().split(':')
	user = entryUSER.get()
	if not user:
		tkinter.messagebox.showwarning('warning', message='用户名为空!')
	else:
		root0.destroy()

loginButton = tkinter.Button(root0, text ="登录", command = Login,bg="Yellow")
loginButton.place(x=135,y=110,width=40,height=25)
root0.bind('<Return>', Login)

root0.mainloop()

# 建立连接
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((IP, int(PORT)))
if user:
  s.send(user.encode()) # 发送用户名
else:
  s.send('用户名不存在'.encode())
  user = IP + ':' + PORT

# 聊天窗口
root1 = tkinter.Tk()
root1.geometry("640x480")
root1.title('群聊')
root1.resizable(0,0)

# 消息界面
listbox = ScrolledText(root1)
listbox.place(x=5, y=0, width=640, height=320)
listbox.tag_config('tag1', foreground='red',backgroun="yellow")
listbox.insert(tkinter.END, '欢迎进入群聊，大家开始聊天吧!', 'tag1')

INPUT = tkinter.StringVar()
INPUT.set('')
entryIuput = tkinter.Entry(root1, width=120, textvariable=INPUT)
entryIuput.place(x=5,y=320,width=580,height=170)

# 在线用户列表
listbox1 = tkinter.Listbox(root1)
listbox1.place(x=510, y=0, width=130, height=320)


def send(*args):
	message = entryIuput.get() + '~' + user + '~' + chat
	s.send(message.encode())
	INPUT.set('')

sendButton = tkinter.Button(root1, text ="\n发\n\n\n送",anchor = 'n',command = send,font=('Helvetica', 18),bg = 'white')
sendButton.place(x=585,y=320,width=55,height=300)
root1.bind('<Return>', send)


def receive():
	global uses
	while True:
		data = s.recv(1024)
		data = data.decode()
		print(data)
		try:
			uses = json.loads(data)
			listbox1.delete(0, tkinter.END)
			listbox1.insert(tkinter.END, "当前在线用户")
			listbox1.insert(tkinter.END, "------Group chat-------")
			for x in range(len(uses)):
				listbox1.insert(tkinter.END, uses[x])
			users.append('------Group chat-------')
		except:
			data = data.split('~')
			message = data[0]
			userName = data[1]
			chatwith = data[2]
			message = '\n' + message
			if chatwith == '------Group chat-------':  # 群聊
				if userName == user:
					listbox.insert(tkinter.END, message)
				else:
					listbox.insert(tkinter.END, message)
			elif userName == user or chatwith == user: # 私聊
				if userName == user:
					listbox.tag_config('tag2', foreground='red')
					listbox.insert(tkinter.END, message, 'tag2')
				else:
					listbox.tag_config('tag3', foreground='green')
					listbox.insert(tkinter.END, message,'tag3')

			listbox.see(tkinter.END)
r = threading.Thread(target=receive)
r.start() # 开始线程接收信息

root1.mainloop()
s.close()