Question

在此分配的第一部分中，您将实现一个回显服务器，该服务器从客户端接收文本消息并将其发送回客户端。（这就是我们称之为回显服务器的原因）当服务器从客户端收到短信时，它将大写字母的奇数字符。例如，当客户端发送一条短信“ hello elec 4120 student”时，服务器应返回一条短信“ Helio Elec 4120 StUdEnT”。

在讲师的提示下，我的服务器代码如下

from socket import *
serverPort = 12000

#create TCP welcoming socket
serverSocket = socket(AF_INET,SOCK_STREAM)
serverSocket.bind(('',serverPort))

#server begins listening for incoming TCP requests
serverSocket.listen(1)
print('The server is ready to receive')

while True:
#server waits on accept()
#for incoming requests, new socket created on return
      connectionSocket, addr = serverSocket.accept()

#read bytes from socket (but not address as in UDP)
      sentence = connectionSocket.recv(1024).decode()
      capitalizedSentence = sentence.upper()

#close connection to this client (but not welcoming socket)
      connectionSocket.send(capitalizedSentence.encode())
      connectionSocket.close()

而客户端代码是

from socket import *
serverPort = 12000
serverName = 'localhost'
#create TCP socket for server, remote port 12000
clientSocket = socket(AF_INET, SOCK_STREAM)
clientSocket.connect((serverName,serverPort))
sentence = raw_input('Input lowercase sentence:')

#No need to attach server name, port
clientSocket.send(sentence.encode())
modifiedSentence = clientSocket.recv(1024)
print ('From Server:', modifiedSentence.decode())
clientSocket.close()

以及我运行服务器代码

'The server is ready to receive'

显示了

，但是当我运行客户端时，

line 6, in <module>
clientSocket.connect((serverName,serverPort))
ConnectionRefusedError: [Errno 61] Connection refused

显示

ConnectionRefusedError：[Errno 61]连接被拒绝macOS High Sierra

0 个答案: