client 에서 입력하는 message 가 서버로 전달되고,
server 에서 입력받은 message를 uppercase(대문자)로 변환하여 다시 client 로 전송하는 프로그램이다.
Client_side
UDPclient_capitalize.py
from socket import * serverName = '~~~.~~~.123.171' # according to intended server IP address serverPort = 12001 # arbitrarily chosen port number while 1: clientSocket = socket(AF_INET, SOCK_DGRAM) # this creates socket _ SOCK_DGRAM indicates that this is a UDP connection message = raw_input('Input lowercase sentence:') # stores the input into 'message' clientSocket.sendto(message,(serverName, serverPort)) modifiedMessage, serverAddress = clientSocket.recvfrom(2048) # 2048 indicates the buffer size print modifiedMessage clientSocket.close()
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Server_side
UDPserver_capitalize.py
from socket import * # Import socket module serverPort = 12001 # Designate port number to be made available serverSocket = socket(AF_INET, SOCK_DGRAM) # Create UDP socket with 'SOCK_DGRAM' serverSocket.bind(('', serverPort)) # Assign port number 12000 to the server's socket print "The server is ready to receive" while 1: # Run never-ending loop because server must be always on message, clientAddress = serverSocket.recvfrom(2048) # Input from client is stored in 'message' # ClientAddress is needed to reply back to host modifiedMessage = message.upper() # Change input in message to uppercase with upper() method serverSocket.sendto(modifiedMessage, clientAddress) # Reply back to client with uppercased message
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