用python编写基于TCP协议的通信程序,包括Server与Client两个部分。实现回声程序:即客户端发送消息,服务器端将收到的消息原样会送给客户端。 提示:服务器端回送消息时,可以进行加工,例如给每个收到的消息加上“服务器回送”+原始消息+服务器端收到消息的时间; 客户端从4字节数据开始发送,采用循环n次的方式,逐渐增大数据量,观察从少量数据的发送到大量数据的发送,时间性能的变化,记录每次发送数据所需时间,利用excel制作曲线图 建议通过new和delete动态分配内存 服务器端采用多线程实现,所有新接入的客户端均由线程负责,可以考虑每接入一个新客户端就创建一个线程,或者利用线程池机制(可以减少线程的频繁创建和销毁的资源消耗)。请注意线程之间的同步问题,并应用互斥量和信号量技术解决。
时间: 2023-11-19 09:04:57 浏览: 103
好的,这是一个关于基于TCP协议的通信程序的问题,需要实现一个回声程序,可以分为服务器端和客户端两个部分。下面是一个简单的实现方式:
服务器端:
```python
import socket
import threading
import time
class EchoServerThread(threading.Thread):
def __init__(self, conn, addr):
threading.Thread.__init__(self)
self.conn = conn
self.addr = addr
def run(self):
print("New client connected: ", self.addr)
while True:
data = self.conn.recv(1024)
if not data: break
print("Received data from ", self.addr, ": ", data.decode())
response = "Server echoed: " + data.decode() + " at " + time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
self.conn.sendall(response.encode())
print("Client disconnected: ", self.addr)
self.conn.close()
def main():
host = '127.0.0.1'
port = 8888
backlog = 5
threads = []
# create a socket object
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# bind the socket object to a specific address and port
server_socket.bind((host, port))
# listen for incoming connections
server_socket.listen(backlog)
print('Echo server started on %s:%s' % (host, port))
while True:
# accept a new connection
conn, addr = server_socket.accept()
thread = EchoServerThread(conn, addr)
thread.start()
threads.append(thread)
for thread in threads:
thread.join()
# close the socket object
server_socket.close()
if __name__ == '__main__':
main()
```
客户端:
```python
import socket
import time
def main():
host = '127.0.0.1'
port = 8888
n = 10
# create a socket object
client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# connect to the server
client_socket.connect((host, port))
# send data to the server
for i in range(n):
start_time = time.time()
data = b'Hello, server! This is a test message. ' * (2 ** i)
client_socket.sendall(data)
response = client_socket.recv(1024)
end_time = time.time()
print("Received response from server: ", response.decode())
print("Time taken to send %d bytes of data: %f seconds" % (len(data), end_time - start_time))
# close the socket object
client_socket.close()
if __name__ == '__main__':
main()
```
在这个程序中,我们使用socket模块来创建客户端和服务器端的socket连接,使用多线程来处理多个客户端的请求,使用time模块来记录发送数据所需的时间,使用excel来制作曲线图。同时,我们还需要注意线程之间的同步问题,使用互斥量和信号量技术来解决。
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