套接字实现基于网络的简易聊天室

 

套接字实现基于网络的简易聊天室

 

 

客户端还有bug，代码还能继续优化，日后有时间再修改。

 

 

服务端代码

import  socketserver
import hmac
import os

secret_key=b'wenli bang bang bang'


# 验证客户端合法性
def conn_auth(conn):

    print('开始验证客户端合法性')
    #生成32位的随机数
    msg=os.urandom(32)
    #发送信息
    conn.sendall(msg)
    #进行加盐
    h=hmac.new(secret_key,msg)
    #转为数字型
    digest=h.digest()
    response = conn.recv(len(digest))
    return hmac.compare_digest(response,digest)





# 继承一个类,每次来一个连接就实例化一个连接，实例与实例之间互相没有影响
class Myserver(socketserver.BaseRequestHandler):
    def handle(self):
        global renshu
        print('conn is:', self.request)
        print('Client addr is:', self.client_address)
        conn = self.request

        #验证客户端合法性
        if not conn_auth(conn):
            print('该链接不合法，关闭连接')
            conn.close()

        Client_list.append(conn)


         # 在线人数
        renshu = len(Client_list)

        print('链接合法,开始通信')


        #进行信息通信
        while True:
            try:
                # 收信息
                data = conn.recv(1024)
                if not data: break
                print(data.decode('utf-8'))

                # 发信息
                for i in range(renshu):
                    print(Client_list,renshu)
                    print(1)
                    if conn is Client_list[i]: continue
                    Client_list[i].sendall(data)
                    print(conn,Client_list[i])
            except Exception as e:
                print(e)
                break
        conn.close()



if __name__ == '__main__':
    ip=input('输入服务端的ip地址:')
    port=4444
    Client_list=[]
    renshu=0
    #ThreadingTCPServer相当于外层循环，Myserver相当于里层循环
    s=socketserver.ThreadingTCPServer((ip,port),Myserver)
    #启动服务
    print('服务端已启动')
    s.serve_forever()

 

 

客户端

from socket import *
import socket
import threading
import hmac


secret_key=b'wenli bang bang bang'


#验证客户端合法性
def conn_auth(conn):
    print('开始进行通信认证')
    msg=conn.recv(32)
    h=hmac.new(secret_key,msg)
    digest=h.digest()
    conn.sendall(digest)



#接收信息
def recevie(s2,buffer_size):
    while True:
        reponse = s2.recv(buffer_size)
        if not reponse:continue
        print('\n-->',reponse.decode('utf-8'))

#发送信息
def send(s2,name):
    while True:
        data = input('-->')
        if not data: continue  # 如果客户端输入信息为空，则继续下一次循环
        if data == 'quite': break
        data = name + ':' + data
        s2.send(data.encode('utf-8'))
    s2.close()


#通信
def commucation(s2,buffer_size,name):
    t1 = threading.Thread(target=recevie,args=(s2,buffer_size))
    t2 = threading.Thread(target=send,args=(s2,name))
    t1.start()
    t2.start()
    t1.join()
    t2.join()


def main(ip,port):
    ip_port = (ip,port)
    buffer_size = 1024
    s2 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s2.connect(ip_port)  # 连接服务端#
    #进行基于连接的认证
    conn_auth(s2)
    print('验证通过')

    #输入姓名
    name = ''
    while name == '':
        name = input('请输入您的名字:')

    #通讯
    commucation(s2,buffer_size,name)



if __name__ == '__main__':
    ip=input('输入你的机器的ip地址:')
    port=4444
    main(ip,port)

　　

 

服务端

import asynchat
import asyncore


# 定义端口
PORT = 6666


class CommandHandler:
    """
    命令处理类
    """

    def unknown(self, session, cmd):
        # 响应未知命令
        # 通过 asynchat.async_chat.push 方法发送消息
        session.push(('Unknown command {} \n'.format(cmd)).encode("utf-8"))

    def handle(self, session, line):
        line = line.decode()
        # 命令处理
        if not line.strip():
            return
        parts = line.split(' ', 1)
        cmd = parts[0]
        try:
            line = parts[1].strip()
        except IndexError:
            line = ''
        # 通过协议代码执行相应的方法
        method = getattr(self, 'do_' + cmd, None)
        try:
            method(session, line)
        except TypeError:
            self.unknown(session, cmd)


#这里我们首先需要一个聊天服务器类，通过继承 asyncore 的 dispatcher 类来实现
# 定义结束异常类
class EndSession(Exception):
    pass


class ChatServer(asyncore.dispatcher):
    """
    聊天服务器
    """

    def __init__(self, port):
        asyncore.dispatcher.__init__(self)
        # 创建socket
        self.create_socket()
        # 设置 socket 为可重用
        self.set_reuse_addr()
        # 监听端口
        self.bind(('127.0.0.1', port))
        self.listen(5)
        self.users = {}
        self.main_room = ChatRoom(self)

    def handle_accept(self):
        conn, addr = self.accept()
        ChatSession(self, conn)






class ChatSession(asynchat.async_chat):
    """
    负责和客户端通信
    """

    def __init__(self, server, sock):
        asynchat.async_chat.__init__(self, sock)
        self.server = server
        self.set_terminator(b'\n')
        self.data = []
        self.name = None
        self.enter(LoginRoom(server))

    def enter(self, room):
        # 从当前房间移除自身，然后添加到指定房间
        try:
            cur = self.room
        except AttributeError:
            pass
        else:
            cur.remove(self)
        self.room = room
        room.add(self)

    def collect_incoming_data(self, data):
        # 接收客户端的数据
        self.data.append(data.decode("utf-8"))

    def found_terminator(self):
        # 当客户端的一条数据结束时的处理
        line = ''.join(self.data)
        self.data = []
        try:
            self.room.handle(self, line.encode("utf-8"))
        # 退出聊天室的处理
        except EndSession:
            self.handle_close()

    def handle_close(self):
        # 当 session 关闭时，将进入 LogoutRoom
        asynchat.async_chat.handle_close(self)
        self.enter(LogoutRoom(self.server))


class Room(CommandHandler):
    """
    包含多个用户的环境，负责基本的命令处理和广播
    """

    def __init__(self, server):
        self.server = server
        self.sessions = []

    def add(self, session):
        # 一个用户进入房间
        self.sessions.append(session)

    def remove(self, session):
        # 一个用户离开房间
        self.sessions.remove(session)

    def broadcast(self, line):
        # 向所有的用户发送指定消息
        # 使用 asynchat.asyn_chat.push 方法发送数据
        for session in self.sessions:
            session.push(line)

    def do_logout(self, session, line):
        # 退出房间
        raise EndSession


class LoginRoom(Room):
    """
    处理登录用户
    """

    def add(self, session):
        # 用户连接成功的回应
        Room.add(self, session)
        # 使用 asynchat.asyn_chat.push 方法发送数据
        session.push(b'Connect Success')

    def do_login(self, session, line):
        # 用户登录逻辑
        name = line.strip()
        # 获取用户名称
        print(name)
        if not name:
            print(1)
            session.push(b'UserName Empty')
        # 检查是否有同名用户
        elif name in self.server.users:
            session.push(b'UserName Exist')
        # 用户名检查成功后，进入主聊天室
        else:
            session.name = name
            session.enter(self.server.main_room)


class LogoutRoom(Room):
    """
    处理退出用户
    """

    def add(self, session):
        # 从服务器中移除
        try:
            del self.server.users[session.name]
        except KeyError:
            pass


class ChatRoom(Room):
    """
    聊天用的房间
    """

    def add(self, session):
        # 广播新用户进入
        session.push(b'Login Success')
        self.broadcast((session.name + ' has entered the room.\n').encode("utf-8"))
        self.server.users[session.name] = session
        Room.add(self, session)

    def remove(self, session):
        # 广播用户离开
        Room.remove(self, session)
        self.broadcast((session.name + ' has left the room.\n').encode("utf-8"))

    def do_say(self, session, line):
        # 客户端发送消息
        self.broadcast((session.name + ': ' + line + '\n').encode("utf-8"))

    def do_look(self, session, line):
        # 查看在线用户
        session.push(b'Online Users:\n')
        for other in self.sessions:
            session.push((other.name + '\n').encode("utf-8"))

if __name__ == '__main__':

    s = ChatServer(PORT)
    try:
        print("chat server run at '127.0.0.1:{0}'".format(PORT))
        asyncore.loop()
    except KeyboardInterrupt:
        print("chat server exit")

# 最后就可以运行程序进行聊天了，注意需要先启动服务器再启动客户端。这个项目中使用了 asyncore 的 dispatcher 来实现服务器，asynchat 的 asyn_chat 来维护用户的连接会话，用 wxPython 来实现图形界面，用 telnetlib 来连接服务器，在子线程中接收服务器发来的消息，由此一个简单的聊天室程序就完成了。

客户端

import wx
import telnetlib
from time import sleep
import _thread as thread

class LoginFrame(wx.Frame):
    """
    登录窗口
    """
    def __init__(self, parent, id, title, size):
        # 初始化，添加控件并绑定事件
        wx.Frame.__init__(self, parent, id, title)
        self.SetSize(size)
        self.Center()
        self.serverAddressLabel = wx.StaticText(self, label="Server Address", pos=(10, 50), size=(120, 25))
        self.userNameLabel = wx.StaticText(self, label="UserName", pos=(40, 100), size=(120, 25))
        self.serverAddress = wx.TextCtrl(self, pos=(120, 47), size=(150, 25))
        self.userName = wx.TextCtrl(self, pos=(120, 97), size=(150, 25))
        self.loginButton = wx.Button(self, label='Login', pos=(80, 145), size=(130, 30))
        # 绑定登录方法
        self.loginButton.Bind(wx.EVT_BUTTON, self.login)
        self.Show()

    def login(self, event):
        # 登录处理
        try:
            serverAddress = self.serverAddress.GetLineText(0).split(':')
            print(serverAddress)
            con.open(serverAddress[0], port=int(serverAddress[1]), timeout=10)
            response = con.read_some()
            if response != b'Connect Success':
                self.showDialog('Error', 'Connect Fail!', (200, 100))
                return
            con.write(('login ' + str(self.userName.GetLineText(0)) + '\n').encode("utf-8"))
            response = con.read_some()
            if response == b'UserName Empty':
                self.showDialog('Error', 'UserName Empty!', (200, 100))
            elif response == b'UserName Exist':
                self.showDialog('Error', 'UserName Exist!', (200, 100))
            else:
                self.Close()
                ChatFrame(None, 2, title='ShiYanLou Chat Client', size=(500, 400))
        except Exception:
            self.showDialog('Error', 'Connect Fail!', (95, 20))

    def showDialog(self, title, content, size):
        # 显示错误信息对话框
        print(1)
        dialog = wx.Dialog(self, title=title, size=size)
        dialog.Center()
        wx.StaticText(dialog, label=content)
        dialog.ShowModal()

class ChatFrame(wx.Frame):
    """
    聊天窗口
    """

    def __init__(self, parent, id, title, size):
        # 初始化，添加控件并绑定事件
        wx.Frame.__init__(self, parent, id, title)
        self.SetSize(size)
        self.Center()
        self.chatFrame = wx.TextCtrl(self, pos=(5, 5), size=(490, 310), style=wx.TE_MULTILINE | wx.TE_READONLY)
        self.message = wx.TextCtrl(self, pos=(5, 320), size=(300, 25))
        self.sendButton = wx.Button(self, label="Send", pos=(310, 320), size=(58, 25))
        self.usersButton = wx.Button(self, label="Users", pos=(373, 320), size=(58, 25))
        self.closeButton = wx.Button(self, label="Close", pos=(436, 320), size=(58, 25))
        # 发送按钮绑定发送消息方法
        self.sendButton.Bind(wx.EVT_BUTTON, self.send)
        # Users按钮绑定获取在线用户数量方法
        self.usersButton.Bind(wx.EVT_BUTTON, self.lookUsers)
        # 关闭按钮绑定关闭方法
        self.closeButton.Bind(wx.EVT_BUTTON, self.close)
        thread.start_new_thread(self.receive, ())
        self.Show()

    def send(self, event):
        # 发送消息
        message = str(self.message.GetLineText(0)).strip()
        if message != '':
            con.write(('say ' + message + '\n').encode("utf-8"))
            self.message.Clear()

    def lookUsers(self, event):
        # 查看当前在线用户
        con.write(b'look\n')

    def close(self, event):
        # 关闭窗口
        con.write(b'logout\n')
        con.close()
        self.Close()

    def receive(self):
        # 接受服务器的消息
        while True:
            sleep(0.6)
            result = con.read_very_eager()
            if result != '':
                self.chatFrame.AppendText(result)

if __name__ == '__main__':
    app = wx.App()
    con = telnetlib.Telnet()
    LoginFrame(None, -1, title="Login", size=(320, 250))
    app.MainLoop()