郑州公司建站搭建/seo推广平台服务

1. 面向连接的套接字和无连接的套接字之间的区别是什么？

• 套接字是计算机网络数据结构，套接字最初是为同一主机上的应用程序所创建，使得主机上的不同应用程序可以相互通信，这就是所谓的进程间通信(Inter Process Communication,IPC)

2. 客户端/服务器架构

• 服务器就是一系列硬件或软件，为一个或多个客户端（服务的用户）提供所需的“服务”。其存在的目的就是等待客户端的请求，并响应他们（提供服务），然后等待更多的请求。

3. TCP和UDP之中，哪种类型的服务器接收连接，并将他们转换到独立的套接字进行客户端通信

TCP

4. 更新TCP(tsTclnt.py)和UDP(tsUclnt.py)客户端，以使得服务器名称无须硬编码到应用程序中。

if __name__ == '__main__':opts, args = getopt.getopt(sys.argv[1:],'',['host=','port='])for op, value in opts:if op == '--host':HOST = valueelif op == '--port':PORT = value

在程序中加入这段代码，可以通过输入命令来进行指定的host和port

5. 编写TCP客户端/服务器程序，使得服务器能够识别以下命令：

• date 服务器返回当前日期/时间戳，即time.ctime()
• os 获取操作系统信息(os.name)
• ls 列出当前目录文件清单（提示：os.listdir()列出一个目录，os.curdir()是当前目录）

tcp_server.py（服务器端代码）

import socket
from time import ctime
import os
import reHOST = ''
PORT = 50006
ADDR = (HOST, PORT)#获取指定路径的文件列表，默认为当前文件列表
def list_dir(path = os.curdir):files = os.listdir(path)filenames = []for file in files:filenames.append(file)return '\n'.join(filenames)with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:s.bind(ADDR)s.listen(5)while True:conn, addr = s.accept()with conn:print('Connected by', addr)while True:data = conn.recv(1024)s_data = ''if not data: breakdata = data.decode('utf-8')#判断指令为timeif data == 'time':s_data = '[%s]'%ctime()#判断指令为oselif data == 'os':s_data = '[%s]'%os.nameelse:#判断指令为lsif data == 'ls':s_data = list_dir()else:#判断指令为ls pathpatt = 'ls\s([^\s]+)'m = re.match(patt,data)if m:path = m.group(1)if os.path.exists(path):s_data = list_dir(path)else:s_data = 'not exist path'else:s_data = 'this is no order' + dataconn.send(s_data.encode('utf-8'))

tcp_clnt.py（客户端代码）

import socketHOST = 'localhost'
PORT = 50006
ADDR = (HOST, PORT)
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:s.connect(ADDR)while True:data = input('>>> ')if not data:breaks.send(data.encode('utf-8'))data = s.recv(1024)if not data:breakdata = data.decode('utf-8')print(data)

6. 半双工聊天

hdserver.py（半双工聊天服务器）

from socket import *HOST = ''
PORT = 50006
BUFSIZE = 1024
ADDR = (HOST, PORT)with socket(AF_INET, SOCK_STREAM) as s:s.bind(ADDR)s.listen(5)while True:conn, addr = s.accept()with conn:print('connected by ',addr)while True:data = conn.recv(BUFSIZE)if not data:breakprint('from:',data.decode('utf-8'))data = input('to: ')if not data:breakconn.send(data.encode('utf-8'))

hdclnt.py（半双工聊天客户端）

from socket import *HOST = 'localhost'
POST = 50006
BUFSIZE = 1024
ADDR = (HOST, POST)with socket(AF_INET, SOCK_STREAM) as s:s.connect(ADDR)while True:data = input('to: ')if not data:breaks.send(data.encode('utf-8'))data = s.recv(BUFSIZE)print('from: ',(data.decode('utf-8')))

7. 全双工聊天

fdserver.py（全双工服务器）

from socket import *
from select import *
import sysHOST = ''
PORT = 50007
BUFSIZE = 1024
ADDR = (HOST, PORT)with socket(AF_INET, SOCK_STREAM) as tcp_server:tcp_server.bind(ADDR)tcp_server.listen(5)inpu = [tcp_server, sys.stdin]while True:conn, addr = tcp_server.accept()inpu.append(conn)while True:r_list, w_list,e_list = select(inpu,[],[])for s in r_list:if s == conn:data = conn.recv(BUFSIZE)if not data: breakprint(data.decode('utf-8'))else:data = input('>>> ')if not data: breakconn.send(data.encode('utf-8'))

fdclnt.py（全双工聊天客户端）

from socket import *
from select import *
import sysHOST = 'localhost'
POST = 50007
BUFSIZE = 1024
ADDR = (HOST, POST)with socket(AF_INET, SOCK_STREAM) as tcp_clnt:tcp_clnt.connect(ADDR)inpu = [tcp_clnt,sys.stdin]while True:r_list, w_list, e_list = select(inpu,[],[])for s in r_list:if s == tcp_clnt:data = tcp_clnt.recv(BUFSIZE)if not data: breakprint((data.decode('utf-8')))else:data = input('>>> ')if not data:breaktcp_clnt.send(data.encode('utf-8'))

8. 多用户全双工聊天

mfd_server（多用户全双工聊天服务器端）

from socket import *
import threadingHOST = ''
PORT = 21568
BUFSIZE = 1024
ADDR = (HOST, PORT)conns = []#当收到消息时，向其他用户发送消息
def deal_conn(conn):while True:data = conn.recv(BUFSIZE)if not data:breakfor c in conns:if c != conn:c.send(data)with socket(AF_INET, SOCK_STREAM) as server:server.bind(ADDR)server.listen(10)while True:conn, addr = server.accept()#向其他用户发送进入聊天室欢迎语if conn not in conns:for c in conns:greet = '欢迎%s来到我们的聊天室！' %str(addr)c.send(greet.encode('utf-8'))conns.append(conn)t = threading.Thread(target=deal_conn,args=(conn,))t.start()

mfd_clnt.py（多用户全双工聊天客户端）

from socket import *
from select import *
import sysHOST = 'localhost'
POST = 21568
BUFSIZE = 1024
ADDR = (HOST, POST)with socket(AF_INET, SOCK_STREAM) as server:server.connect(ADDR)inpu = [server,sys.stdin]while True:r_list, w_list, e_list = select(inpu,[],[])for s in r_list:if s == server:data = server.recv(BUFSIZE)if not data: breakprint((data.decode('utf-8')))else:data = input('>>> ')if not data:breakserver.send(data.encode('utf-8'))

9. 多用户、多房间、全双工聊天

# mmfd_server（多用户多房间全双工聊天）

from socket import *
import re
import threadingHOST = ''
PORT = 21568
BUFSIZE = 1024
ADDR = (HOST, PORT)rooms = {}
conns = {}REFUSE = '对方正在聊天，您的请求拒绝连接'.encode('utf-8')
WAITING = '请等待对方上线'.encode('utf-8')
INPUT_ERROR = '您的输入有误'.encode('utf-8')def deal_conn(name):while True:conn_from = conns[name]data = conn_from.recv(BUFSIZE)if not data:breakif rooms[name] in conns:conn_to = conns[rooms[name]]conn_to.send(data)else:conn_from.send(WAITING)with socket(AF_INET, SOCK_STREAM) as server:server.bind(ADDR)server.listen(10)while True:conn, addr = server.accept()settings = conn.recv(BUFSIZE)patt = r'name:(.+)\sto:(.+)'m = re.match(patt,settings.decode('utf-8'))if not m:conn.send(INPUT_ERROR)name = m.group(1)if name not in conns:conns[name] = connto = m.group(2)if name not in rooms and to not in rooms:rooms[name] = torooms[to] = nameelif name in rooms and rooms[name] != to:del conns[name]if name in rooms:del rooms[name]conn.send(REFUSE)conn.close()t = threading.Thread(target=deal_conn,args=(name,))t.start()

mmfd_clnt（多用户多房间全双工聊天）

from socket import *
from select import *
import sysHOST = 'localhost'
POST = 21568
BUFSIZE = 1024
ADDR = (HOST, POST)with socket(AF_INET, SOCK_STREAM) as server:server.connect(ADDR)inpu = [server,sys.stdin]print("请输入你的姓名和对方的姓名(格式name:你的姓名 to:对方姓名)")data = input('')server.send(data.encode('utf-8'))while True:r_list, w_list, e_list = select(inpu,[],[])for s in r_list:if s == server:data = server.recv(BUFSIZE)if not data: breakprint((data.decode('utf-8')))else:data = input('>>> ')if not data:breakserver.send(data.encode('utf-8'))