项目简介
编程语言：Python3
界面实现：Pyside2（通过QT Designer设计）
基于TCP网络编程
项目概略图：
实现功能
（1） 客户端通过服务器访问数据库，进行登录注册
（2） 群发功能（默认是群发，所有在线用户可见）
（3） 私发功能（需要选定用户，发送消息为私发）
（4） 上线通知（已经在线用户收到其上线通知，刚上线用户收到欢迎语，并实时修改当前在线用户列表和在线人数）
（5） 下线通知（用户下线后通知在线用户，并实时修改在线列表和在线人数）
（6） 服务器可访问数据库，检查登陆信息是否正确，并向客户端返回登陆信息
（7） 服务器提供注册检查，发送是否注册
（8） 转发消息（群发，私发，上线，下线通知）
（9） 显示当前在线用户，用户下线时将其从列表中删除
服务端代码
# Author:wenfei
import datetime
import socket
import threading
import json
import pymysql
host ="127.0.0.1"
prot =8080
socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
socket.bind((host, prot))# 服务端用bind，客户端用连接connec
socket.listen(5)
condi = threading.Condition()
user_list = {}# 存储用户名称和服务端与改用户的socket字典
conn_list = {}# 存储服务端与所有的客户端的地址与socket
thr = {}# 存储所开启的线程
if_the_first =True # 第一次为发送开启线程
out_message = []# 服务端向外发送的消息存储
user_name = []# 用户名称列表
user_conn = []# 用户连接列表
def edit_stats(name):# 获得已经登录用户的名称
connection = pymysql.connect(host="localhost",port=3306,user="root",password="",db="test",
charset="utf8mb4",cursorclass=pymysql.cursors.DictCursor)
cursor = connection.cursor()
sql ="update user set stats = 0 where name = '%s'"%(name)
cursor.execute(sql)
connection.commit()
connection.close()
def check_login(name, passwd):
print("执行查询语句\n")
stats =0
connectoin = pymysql.connect(host="localhost",port=3306,user="root",password="",db="test",
charset="utf8mb4",cursorclass=pymysql.cursors.DictCursor)
cursor = connectoin.cursor()
sql ="select *from user"
cursor.execute(sql)
result = cursor.fetchall()
print("打印查询结果：\n", result)
for datain result:
if data['name'] == nameand data['passwd'] == passwd:
if not data['stats']:
sql ="update user set stats = 1 where name = '%s'" % (name)
try:
cursor.execute(sql)
connectoin.commit()# 提交到数据库执行
stats =1 # 返回1表示登录成功
except:
connectoin.rollback()# 发生错误时，回滚
else:
stats =2 #2表示用户已近登录
else:
pass
connectoin.close()
return stats
def check_register(name, passwd):
stats =0
connection = pymysql.connect(host="localhost",port=3306,user="root",password="",db="test",
charset="utf8mb4",cursorclass=pymysql.cursors.DictCursor)
cursor = connection.cursor()
sql ="select name from user"
cursor.execute(sql)
result = cursor.fetchall()
print("服务端打印 注册查询结果", result)
if_exist =False
for datein result:
if name == date['name']:
if_exist =True
if not if_exist:
sql ="insert into user(name, passwd, stats) value ('%s','%s', 0)" % (name, passwd)
cursor.execute(sql)
connection.commit()
stats =1
connection.close()
return stats
def threadOut(conn):
global out_message, user_list, message, user_name, user_conn
while True:
if len(out_message) ==2:
print("是都有数据发送", out_message)
try:
js = json.loads(out_message[0])
print("取得js值", js)
# 登录消息
if js['type'] =='login':
print("登录类型")
nickname =str(js['nickname'])
passwd =str(js['passwd'])
stats = check_login(nickname, passwd)
out_message[1].send(json.dumps({
'type':'check',
'stats':stats
}).encode())
print("服务端登录验证发送成功")
if stats ==1:# 表示当前用户登录成功
user_list[nickname] = out_message[1]# 将当前用户加入到列表中r,并存储该用户的连接
print("服务端打印当前登录用户的信息", nickname, out_message[1])
print("打印全局连接字典的值", conn)
user_name.append(nickname)
for conin conn.values():
if con != out_message[1]:
con.send(json.dumps({'type':'notify',
'message':"系统通知：" + nickname +'上线',
'datetime':datetime.datetime.strftime(datetime.datetime.now(),'%Y-%m-%d %H:%M:%S'),
'current_user_name_list':repr(user_name),
}).encode())
print("服务端通知其他用户")
else:
print("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
# 套接字直接发送过去，不能用eval和exec函数进行解析，因为其中含有<>字符
# 在发送之前先将字典转换为两个列表
# 在接收到之后，将两个列表合并为字典
out_message[1].send(json.dumps({
'type':'welcome',
'message':"welcome " + nickname +" to the chat room ",
'current_user_name_list':repr(user_name),
'datetime': datetime.datetime.strftime(datetime.datetime.now(),'%Y-%m-%d %H:%M:%S')
}).encode())
print("服务端给当前用户发送欢迎")
print('登录成功！')
# 群发消息
elif js['type'] =='broadcast':
print("广播类型")
message = js['message']
nickname = js['nickname']
date_time = js['datetime']
for key, valuein conn.items():
conn[key].send(json.dumps(
{
'type':'message',
'message': nickname +':' + message,
'datetime':date_time
}).encode())
print("服务端发送消息成功")
print("打印当前所有用户信息", conn_list)
# 注册类型
elif js['type'] =='register':
stats = check_register(js['register_name'], js['register_passwd'])
out_message[1].send(json.dumps({
'type':'register_check',
'stats':stats
}).encode())
# 私发消息
elif js['type'] =='sendto':
print("私发类类型")
who = js['who']
nickname = js['nickname']
message = js['message']
date_time = js['datetime']
# 检查用户是否存在
if whonot in user_list.keys():
out_message[1].send(json.dumps(
{
'type':'message',
'message': who +' 不在线 .please try later.',
'datetime':datetime.datetime.strftime(datetime.datetime.now(),'%Y-%m-%d %H:%M:%S')
}).encode())
print("服务端确认用户不在线")
else:
user_list[who].send(json.dumps(
{
'type':'message',
'message':"私聊信息:" + nickname +' whisper to you: ' + message,
'datetime':date_time
}).encode())
print("服务端私发信息成功")
# 离线消息
elif js['type'] =='offline':
date_time = js['datetime']
off_name = js['off_name']
print(message)
for key, valuein conn.items():
conn[key].send(json.dumps(
{
'type':'offline',
'message':'系统通知：' + off_name +' 下线了 !!',
'off_name':off_name,
'datetime':date_time
}).encode())
print("服务端离线信息通知在线用户")
out_message.clear()
except :
print("服务端发送消息时出现错误")
out_message.clear()
def threadIn(conn):# 接收消息
global out_message, conn_list, user_list, user_name
while True:
try:
temp = conn.recv(1024)
if not temp:
print("跳出循环")
break
else:
out_message.clear()
out_message.append(temp.decode())#将受到的消息复制给全局变量
out_message.append(conn)# 存储收到当前消息的socket 连接对象
except:
out_message.clear()
for keyin list(user_list.keys()):
if user_list[key] == conn:
user_list.pop(key)#将当前用户从在线字典中删除
user_name.remove(key)# 将当前用户从在线列表中删除
out_message.append(json.dumps({
'type':'offline',
'off_name':key,
'datetime':datetime.datetime.strftime(datetime.datetime.now(),'%Y-%m-%d %H:%M:%S')
}))
out_message.append(conn)
for keyin list(conn_list.keys()):
if conn_list[key] == conn:
conn_list.pop(key)
break
while True:
conn, client_address = socket.accept()
print("有新用户连接", conn, client_address )
conn_list[client_address] = conn
print("打印全局变量conn_list的值", conn_list)
thr[client_address] = threading.Thread(target=threadIn,args=(conn,))
if if_the_first:
thr['fasong'] = threading.Thread(target=threadOut,args=(conn_list,))
thr['fasong'].start()# 发送只开启一个线程
print("启动发送线程")
if_the_first =False
thr[client_address].start()
登录注册界面（客户端）
import json
from PySide2.QtWidgetsimport QApplication, QMessageBox, QWidget
from PySide2.QtUiToolsimport QUiLoader
from PySide2.QtCoreimport QFile
import socket
from loginimport Login
class Main_window(QWidget):
def __init__(self):
super(Main_window,self).__init__()
main_xml = QFile("E:/Python_demo/ui/login_register.ui")
main_xml.open(QFile.ReadOnly)
main_xml.close()
self.main_ui = QUiLoader().load(main_xml)
self.main_ui.register_btn.clicked.connect(self.register)# 给登录按钮绑定点击事件
self.main_ui.login_button.clicked.connect(self.login)# 给注册按钮绑定点击事件
self.check_stats =False
self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.socket.connect(('127.0.0.1',8080))
def login(self):
name =self.main_ui.username.text()
passwd =self.main_ui.passwd.text()
print("点击登录按钮，获取到账号密码", name, passwd)
self.socket.send(json.dumps({
'type':'login',
'nickname':name,
'passwd':passwd
}).encode())
print("登录窗口发送账号密码成功")
recive =self.socket.recv(1024)
print("客户端收到验证结果", recive.decode())
js = json.loads(recive.decode())
print("客户端收到js数据", js)
if js['type'] =='check':
stats = js['stats']
if stats ==0:# 表示用户名或密码不正确
QMessageBox.warning(self.main_ui,
"警告",
"用户名或密码错误")
elif stats ==1:
login = Login(name,self.socket)
login.chat_window.show()
print("登录成功")# 此时关闭窗口，将socket传给子窗口
self.main_ui.setVisible(False)
elif stats ==2:
QMessageBox.information(self.main_ui,
"提示",
"该用户已经登录")
def register(self):
send_tag =True
print("you click the registerButton")
name =self.main_ui.username.text()
passwd =self.main_ui.passwd.text()
if name =='' or passwd =='':
QMessageBox.warning(self.main_ui,
"警告",
"用户名和密码不能为空")
send_tag =False
if send_tag:
self.socket.send(json.dumps({
'type':'register',
'register_name':name,
'register_passwd':passwd
}).encode())
print("将注册用户名和密码发给服务端")
rec =self.socket.recv(1024)
js = json.loads(rec.decode())
print("从服务端收到注册验证")
if js['type'] =='register_check':
stats = js['stats']
if stats ==0:
QMessageBox.information(self.main_ui,
"提示",
"用户名已存在")
elif stats ==1:
QMessageBox.about(self.main_ui,
"提示",
"注册成功")
if __name__ =='__main__':
app = QApplication([])
main_login = Main_window()
main_login.main_ui.show()
app.exec_()
聊天界面代码
import json
from PySide2.QtWidgetsimport QApplication, QMessageBox, QWidget, QMainWindow, QLabel
from PySide2.QtUiToolsimport QUiLoader
from PySide2.QtCoreimport QFile, QThread, Signal
import threading
import pymysql
import datetime
outString =''
inString =''
IP ="192.168.0.107"
nick =''
port =8080
if_send_tag =False
tag_if_edit =False
current_user_list_of_server = []
conn_list = []
current_user_list = []
if_chat_individually =False
chat_individually_message ="chat_individually"
to_who =''
off_name =''
class Login(QMainWindow):
def __init__(self, name, sock, parent=None):# 接受一个连接的socket,登录的姓名
global current_user_list
super().__init__(parent)
self.name = name
self.socket = sock
chat = QFile("E:/Python_demo/ui/chat_window.ui")
chat.open(QFile.ReadOnly)
chat.close()
self.chat_window = QUiLoader().load(chat)# 加载聊天界面
self.chat_window.name_user.setText(self.name)# 设定当前用户名
self.chat_string =self.chat_window.chat_string
self.listWidget =self.chat_window.listWidget
self.listWidget.itemClicked.connect(self.item_click)# 绑定在线列表的点击事件，用于私发信息
self.chat_window.send_button.clicked.connect(self.send_message)# 绑定发送按钮事件，用于发送消息
self.th_send = threading.Thread(target=self.client_send)# 默认有一个self参数，不用写进去
self.th_accept = threading.Thread(target=self.client_accept)# 默认有一个self参数，不用写进去
self.th_accept.setDaemon(True)
self.th_send.setDaemon(True)
self.workerObject = testThread(self)
self.inString ='' # 接受到服务端的信息
self.current_people_count_label =self.chat_window.user_count# 聊天界面显示当前在线人数
self.th_send.start()# 启动发送线程
self.th_accept.start()# 启动接收线程
self.workerObject.start()# 启动QThread线程，用于实时更新界面
def item_click(self, item):
global if_chat_individually, to_who
if_chat_individually =True
to_who = item.text()[0:item.text().find('在')]
# print("点击了----------item-----------", item.text())
def send_message(self):
global if_send_tag, outString
if_send_tag =True
outString =self.chat_window.outStringEdit.text()
self.chat_window.outStringEdit.setText('')
def client_send(self):
global if_send_tag, outString, if_chat_individually
while True:
if if_send_tag:
if if_chat_individually:# 判断是否是私发消息
print("客户端发送，为私发类型")
self.socket.send(json.dumps({
'type':'sendto',
'message': outString,
'who': to_who,
'nickname':self.name,
'datetime':datetime.datetime.strftime(datetime.datetime.now(),'%Y-%m-%d %H:%M:%S')
}).encode())
print("私发类型消息发送成功")
if_chat_individually =False
if_send_tag =False
else:
print("客户端发送，为群发类型")
self.socket.send(json.dumps({
'type':'broadcast',
'message': outString,
'nickname':self.name,
'datetime': datetime.datetime.strftime(datetime.datetime.now(),'%Y-%m-%d %H:%M:%S')
}).encode())
print("群发类型消息发送成功")
if_send_tag =False
def client_accept(self):
global inString, tag_if_edit, current_user_list, current_user_list_of_server, off_name
while True:
try:
inString =self.socket.recv(1024)
if not inString:# 如果没有收到
continue
else:
js = json.loads(inString)
if js['type'] =='message':
print("收到群发消息=", js['message'])
self.inString = js['message'] +' ' + js['datetime']
elif js['type'] =='notify':
print("客户端收到服务端发来的通知信息")
current_user_list_of_server =eval(js['current_user_name_list'])
self.inString = js['message'] +' ' + js['datetime']
elif js['type'] =='welcome':
print("收到来自服务端的欢迎信息", js['current_user_name_list'],"^^^type^^^^^^^")
current_user_list_of_server =eval(js['current_user_name_list'])
# print("打印从服务端收到的当前用户信息", current_user_list_of_server, type(current_user_list_of_server))
self.inString = js['message'] + js['datetime']
elif js['type'] =='offline':
print("收到离线消息=", js['message'])
self.inString = js['message'] +' ' + js['datetime']
off_name = js['off_name']# 获取下线人的名称
tag_if_edit =True # 此时可以修改显示信息
except :
print("客户端接数消息出错")
break
class testThread(QThread):
finished = Signal()
def __init__(self, win, parent=None):
super(testThread,self).__init__(parent)
self.win = win
def run(self):
global tag_if_edit, current_user_list, current_user_list_of_server, off_name
while True:
if tag_if_edit:
self.win.chat_string.appendPlainText(str(self.win.inString))
print("打印当前用户字典和在线列表", current_user_list, current_user_list_of_server)
for itemin current_user_list_of_server:
self.win.current_people_count_label.setText(str(len(current_user_list_of_server)))
print(itemnot in current_user_list)
if itemnot in current_user_list:
current_user_list.append(item)
print("子线程操作UI")
self.win.listWidget.addItem(item +"在线")# 将在线人添加到QlistWidget的item中
if off_name:
count =self.win.listWidget.count()
for iin range(count):
str_item =self.win.listWidget.item(i).text()
name = str_item[0:str_item.find('在')]
if name == off_name:
self.win.listWidget.takeItem(i)# 从在线列表中删除当前下线的人
off_name =''
print("删除当前下线用户")
self.win.current_people_count_label.setText(str(count-1))# 将在线人数减去1
print("重置当前人数")
tag_if_edit =False
# socket.bind(('127.0.0.1',)# 连接
if __name__ =='__main__':
app = QApplication([])
login = Login("直接启动")
login.chat_window.show()
app.exec_()
启动