1、首先,我们编写C语言的头文件#include <stdio.h>。
2、然后我们编写Main函数框架。
3、接下来我们定义两个变量,如下图所示。
4、然后我们编写输入的函数,如下图所示。
5、接下来在输入后,我们编写输出程序。
6、这时候,我们便可以观察最终结果。
一、课程介绍
1.简介
本次项目课是实现简单聊天室程序的服务器端和客户端。
2.知识点
服务器端涉及到asyncore、asynchat和socket这几个模块,客户端用到了telnetlib、wx、time和thread这几个模块。
3.所需环境
本次课中编写客户端需要用到wxPython,它是一个GUI工具包,请先使用下面的命令安装:
$ sudo apt-get install python-wxtools
密码为shiyanlou
4.项目效果截图
登录窗口
聊天窗口
二、项目实战(服务器端)
1.服务器类
首先需要一个聊天服务器,这里继承asyncore的dispatcher类来实现,代码如下
class ChatServer(dispatcher):
"""
聊天服务器
"""
def __init__(self, port):
dispatcher.__init__(self)
self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
self.set_reuse_addr()
self.bind(('', port))
self.listen(5)
self.users = {}
self.main_room = ChatRoom(self)
def handle_accept(self):
conn, addr = self.accept()
ChatSession(self, conn)
2.会话类
有了服务器类还需要能维护每个用户的连接会话,这里继承asynchat的async_chat类来实现,代码如下:
class ChatSession(async_chat):
"""
负责和单用户通信
"""
def __init__(self, server, sock):
async_chat.__init__(self, sock)
self.server = server
self.set_terminator('\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):
'接受客户端的数据'
self.data.append(data)
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)
except EndSession:
self.handle_close()
def handle_close(self):
async_chat.handle_close(self)
self.enter(LogoutRoom(self.server))
3.命令解释器
现在就需要一个命令解释器能够解释用户的命令,例如登录、查询在线用户和发消息等,代码如下:
class CommandHandler:
"""
命令处理类
"""
def unknown(self, session, cmd):
'响应未知命令'
session.push('Unknown command: %s\n' % cmd)
def handle(self, session, line):
'命令处理'
if not line.strip():
return
parts = line.split(' ', 1)
cmd = parts[0]
try:
line = parts[1].strip()
except IndexError:
line = ''
meth = getattr(self, 'do_' + cmd, None)
try:
meth(session, line)
except TypeError:
self.unknown(session, cmd)
4.房间
接下来就需要实现聊天室的房间了,这里我们定义了三种房间,分别是用户刚登录时的房间、聊天的房间和退出登录的房间,这三种房间都有一个公共的父类,代码如下:
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'
for session in self.sessions:
session.push(line)
def do_logout(self, session, line):
'退出房间'
raise EndSession
class LoginRoom(Room):
"""
刚登录的用户的房间
"""
def add(self, session):
'用户连接成功的回应'
Room.add(self, session)
session.push('Connect Success')
def do_login(self, session, line):
'登录命令处理'
name = line.strip()
if not name:
session.push('UserName Empty')
elif name in self.server.users:
session.push('UserName Exist')
else:
session.name = name
session.enter(self.server.main_room)
class ChatRoom(Room):
"""
聊天用的房间
"""
def add(self, session):
'广播新用户进入'
session.push('Login Success')
self.broadcast(session.name + ' has entered the room.\n')
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')
def do_say(self, session, line):
'客户端发送消息'
self.broadcast(session.name + ': ' + line + '\n')
def do_look(self, session, line):
'查看在线用户'
session.push('Online Users:\n')
for other in self.sessions:
session.push(other.name + '\n')
class LogoutRoom(Room):
"""
用户退出时的房间
"""
def add(self, session):
'从服务器中移除'
try:
del self.server.users[session.name]
except KeyError:
pass
5.服务器端完整代码
#!/usr/bin/python
# encoding: utf-8
from asyncore import dispatcher
from asynchat import async_chat
import socket, asyncore
PORT = 6666 #端口
class EndSession(Exception):
"""
自定义会话结束时的异常
"""
pass
class CommandHandler:
"""
命令处理类
"""
def unknown(self, session, cmd):
'响应未知命令'
session.push('Unknown command: %s\n' % cmd)
def handle(self, session, line):
'命令处理'
if not line.strip():
return
parts = line.split(' ', 1)
cmd = parts[0]
try:
line = parts[1].strip()
except IndexError:
line = ''
meth = getattr(self, 'do_' + cmd, None)
try:
meth(session, line)
except TypeError:
self.unknown(session, cmd)
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'
for session in self.sessions:
session.push(line)
def do_logout(self, session, line):
'退出房间'
raise EndSession
class LoginRoom(Room):
"""
刚登录的用户的房间
"""
def add(self, session):
'用户连接成功的回应'
Room.add(self, session)
session.push('Connect Success')
def do_login(self, session, line):
'登录命令处理'
name = line.strip()
if not name:
session.push('UserName Empty')
elif name in self.server.users:
session.push('UserName Exist')
else:
session.name = name
session.enter(self.server.main_room)
class ChatRoom(Room):
"""
聊天用的房间
"""
def add(self, session):
'广播新用户进入'
session.push('Login Success')
self.broadcast(session.name + ' has entered the room.\n')
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')
def do_say(self, session, line):
'客户端发送消息'
self.broadcast(session.name + ': ' + line + '\n')
def do_look(self, session, line):
'查看在线用户'
session.push('Online Users:\n')
for other in self.sessions:
session.push(other.name + '\n')
class LogoutRoom(Room):
"""
用户退出时的房间
"""
def add(self, session):
'从服务器中移除'
try:
del self.server.users[session.name]
except KeyError:
pass
class ChatSession(async_chat):
"""
负责和单用户通信
"""
def __init__(self, server, sock):
async_chat.__init__(self, sock)
self.server = server
self.set_terminator('\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):
'接受客户端的数据'
self.data.append(data)
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)
except EndSession:
self.handle_close()
def handle_close(self):
async_chat.handle_close(self)
self.enter(LogoutRoom(self.server))
class ChatServer(dispatcher):
"""
聊天服务器
"""
def __init__(self, port):
dispatcher.__init__(self)
self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
self.set_reuse_addr()
self.bind(('', port))
self.listen(5)
self.users = {}
self.main_room = ChatRoom(self)
def handle_accept(self):
conn, addr = self.accept()
ChatSession(self, conn)
if __name__ == '__main__':
s = ChatServer(PORT)
try:
asyncore.loop()
except KeyboardInterrupt:
三、项目实战(客户端)
完成了服务器端后,就需要实现客户端了,这里客户端连接服务器使用了telnetlib模块。
1.登录窗口
这里的图形界面包选择了wxPython,前面有安装说明,登录窗口通过继承wx.Frame类来实现,代码如下:
class LoginFrame(wx.Frame):
"""
登录窗口
import java.io.InputStreamimport java.io.DataInputStream
import java.io.InputStreamReader
import java.io.OutputStream
import java.io.DataOutputStream
import java.io.BufferedReader
import java.net.ServerSocket
import java.net.Socket
import java.io.IOException
import java.util.Date
class Server
{
public Server()
{
try
{
ServerSocket s=new ServerSocket(8888)
Socket ss=s.accept()
OutputStream out=ss.getOutputStream()
DataOutputStream dout=new DataOutputStream(out)
InputStream in=ss.getInputStream()
DataInputStream din=new DataInputStream(in)
System.out.print(din.readUTF()+"!")
dout.writeUTF("你已经连接到服务器"+"\t"+"你的地址:"+ss.getInetAddress()+"\t"
+"你的链接端口:"+ss.getLocalPort()+"\n")
new ReadMessage(din).start()
new SendMessage(dout).start()
}
catch (IOException e)
{
e.printStackTrace()
}
}
public static void main(String[] args)
{
new Server()
}
}
//接受客户端信息
class ReadMessage extends Thread
{
private DataInputStream din
public ReadMessage(DataInputStream din)
{
this.din=din
}
public void run()
{
String str
try
{
while (true)
{
str=din.readUTF()
System.out.println(new Date().toLocaleString()+"客户端说:"+str)
if (str.equals("bye"))
{
System.out.println("客户端下线!")
break
}
}
}
catch (IOException e)
{
e.printStackTrace()
}
}
}
// 发出服务器信息
class SendMessage extends Thread
{
private DataOutputStream dout
public SendMessage(DataOutputStream dout)
{
this.dout=dout
}
public void run()
{
InputStreamReader inr=new InputStreamReader(System.in)
BufferedReader buf=new BufferedReader(inr)
String str
try
{
while(true)
{
str=buf.readLine()
dout.writeUTF(str)
if (str.equals("bye"))
{
System.out.println("服务器退出!")
System.exit(1)
}
}
}
catch (IOException e)
{
e.printStackTrace()
}
}
}
import java.io.InputStream
import java.io.DataInputStream
import java.io.InputStreamReader
import java.io.OutputStream
import java.io.DataOutputStream
import java.io.BufferedReader
import java.net.Socket
import java.io.IOException
import java.util.Date
class Client
{
public Client()
{
try
{
Socket s=new Socket("192.168.1.2",8888)
InputStream in=s.getInputStream()
DataInputStream din=new DataInputStream(in)
OutputStream out=s.getOutputStream()
DataOutputStream dout=new DataOutputStream(out)
dout.writeUTF("服务器你好!我是客户端")
System.out.println(din.readUTF())
new Thread(new SenderMessage(dout)).start()
new Thread(new ReaderMessage(din)).start()
}
catch (IOException e)
{
e.printStackTrace()
}
}
public static void main(String[] args)
{
new Client()
}
}
class ReaderMessage implements Runnable
{
private DataInputStream din
public ReaderMessage(DataInputStream din)
{
this.din=din
}
public void run()
{
String str
try
{
while(true)
{
str=din.readUTF()
System.out.println(new Date().toLocaleString()+"服务器说:"+str)
if (str.equals("bye"))
{
System.out.println("服务器已经关闭,此程序自动退出!")
break
}
}
}
catch (IOException e)
{
e.printStackTrace()
}
}
}
class SenderMessage implements Runnable
{
private DataOutputStream dout
public SenderMessage(DataOutputStream dout)
{
this.dout=dout
}
public void run()
{
String str
InputStreamReader inf=new InputStreamReader(System.in)
BufferedReader buf=new BufferedReader(inf)
try
{
while (true)
{
str=buf.readLine()
dout.writeUTF(str)
if (str.equals("bye"))
{
System.out.println("客户端自己退出!")
System.exit(1)
}
}
}
catch (IOException e)
{
e.printStackTrace()
}
}
}
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