调整第二单元实验的参考代码目录结构

CODE/chapter2/SMTPClient.py

@@ -1,66 +0,0 @@
-from socket import *
-from base64 import *
-
-mailfrom = "mail from:2@test.com\r\n"
-rcptto = "rcpt to:1@test.com\r\n"
-data = "data\r\n"
-quitmsg = "quit\r\n"
-
-msg = "\r\n I love computer networks!"
-endmsg = "\r\n.\r\n"
-#此处使用易邮邮件服务器软件搭建了一个内网邮件服务器
-mailserver = '10.130.82.62'
-mailport = 25
-connectaddress = (mailserver, mailport)
-# Create socket called clientSocket and establish a TCP connection with mailserver
-clientSocket = socket(AF_INET, SOCK_STREAM)
-clientSocket.connect(connectaddress)
-
-recv = clientSocket.recv(1024)
-print (recv)
-if recv[:3] != '220':
-    print ('220 reply not received from server.')
-# Send HELO command and print server response.
-heloCommand = 'HELO Alice\r\n'
-clientSocket.send(bytes(heloCommand.encode()))
-recv1 = clientSocket.recv(1024)
-print (recv1.decode())
-if recv1[:3] != '250':
-    print ('250 reply not received from server.')
-
-#print('000000000000000')
-#从命令和打印服务器响应发送邮件。
-login = b'auth login\r\n'
-clientSocket.send(login)
-recv2 = clientSocket.recv(1024).decode('utf-8')
-print ('222+',recv2)
-
-userCommand = b64encode('2@test.com'.encode('utf-8'))
-clientSocket.send((str(userCommand,encoding='utf-8')+'\r\n').encode())
-recv3 = clientSocket.recv(1024).decode('utf-8')
-print ('333+',recv3)
-
-password = b64encode('2'.encode('utf-8'))
-clientSocket.send((str(password,encoding='utf-8')+'\r\n').encode())
-recv4 = clientSocket.recv(1024).decode('utf-8')
-print ('444+',recv4)
-
-#print('0000000000000000')
-
-clientSocket.send(bytes(mailfrom.encode()))
-check = clientSocket.recv(1024)
-print(check)
-clientSocket.send(bytes(rcptto.encode()))#将RCPT发送到命令和打印服务器响应。
-check1 = clientSocket.recv(1024)
-print(check1)
-clientSocket.send(bytes(data.encode()))#发送数据命令和打印服务器响应。
-check2 = clientSocket.recv(1024)
-print(check2)
-clientSocket.send(bytes((mailfrom+msg+endmsg).encode()))#发送消息数据。
-check3 = clientSocket.recv(1024)
-print(check3)
-#发送退出命令并获得服务器响应。
-clientSocket.send(bytes(quitmsg.encode()))
-check4 = clientSocket.recv(1024)
-print(check4)
-clientSocket.close()

CODE/chapter2/Websever.py

@@ -1,62 +0,0 @@
-# Import socket module
-from socket import * 
-import sys # In order to terminate the program
-
-# Create a TCP server socket
-#(AF_INET is used for IPv4 protocols)
-#(SOCK_STREAM is used for TCP)
-
-serverSocket = socket(AF_INET, SOCK_STREAM)
-
-# Assign a port number
-serverPort = 80
-
-# Bind the socket to server address and server port
-serverSocket.bind(("", serverPort))
-
-# Listen to at most 1 connection at a time
-serverSocket.listen(1)
-
-# Server should be up and running and listening to the incoming connections
-
-while True:
-	print('The server is ready to receive')
-
-	# Set up a new connection from the client
-	connectionSocket, addr = serverSocket.accept()
-
-	# If an exception occurs during the execution of try clause
-	# the rest of the clause is skipped
-	# If the exception type matches the word after except
-	# the except clause is executed
-	try:
-		# Receives the request message from the client
-		message = connectionSocket.recv(1024).decode()
-		# Extract the path of the requested object from the message
-		# The path is the second part of HTTP header, identified by [1]
-		filename = message.split()[1]
-		# Because the extracted path of the HTTP request includes 
-		# a character '\', we read the path from the second character 
-		f = open(filename[1:])
-		# Store the entire contenet of the requested file in a temporary buffer
-		outputdata = f.read()
-		# Send the HTTP response header line to the connection socket
-		connectionSocket.send("HTTP/1.1 200 OK\r\n\r\n".encode()) 
- 
-		# Send the content of the requested file to the connection socket
-		for i in range(0, len(outputdata)):  
-			connectionSocket.send(outputdata[i].encode())
-		connectionSocket.send("\r\n".encode()) 
-		
-		# Close the client connection socket
-		connectionSocket.close()
-
-	except IOError:
-			# Send HTTP response message for file not found
-			connectionSocket.send("HTTP/1.1 404 Not Found\r\n\r\n".encode())
-			connectionSocket.send("<html><head></head><body><h1>404 Not Found</h1></body></html>\r\n".encode())
-			# Close the client connection socket
-			connectionSocket.close()
-
-serverSocket.close()  
-sys.exit()#Terminate the program after sending the corresponding data

CODE/reference/ch_socket/readme.md

@@ -0,0 +1,12 @@
+# 套接字编程参考实现
+
+# 说明
+
+这个目录中的四个Python文件是实验单元“基于套接字的网络编程”
+中三个实验的参考实现代码。
+
+其中：
+
+* UDP_Pinger_*.py 是实验“套接字基础与UDP通信”的参考实现
+* Websever.py 是实验“TCP通信与Web服务器”的参考实现
+* SMTPClient.py 是实验“SMTP客户端实现”的参考实现

code/ch_socket/UDP_Pinger_Client.py

@@ -1,19 +0,0 @@
-from socket import *
-import time
-serverName = 'localhost'
-serverPort = 12000
-clientSocket = socket(AF_INET, SOCK_DGRAM)
-clientSocket.settimeout(1)
-
-for i in range(0, 10):
-	sendTime = time.time()
-	message = ('Ping %d %s' % (i + 1, sendTime)).encode()
-	try:
-		clientSocket.sendto(message, (serverName, serverPort))
-		modifiedMessage, serverAddress = clientSocket.recvfrom(2048)
-		rtt = time.time() - sendTime
-		print('Sequence %d: Reply from %s  RTT = %.3fs' % (i + 1, serverName, rtt))
-	except Exception as e:
-		print('Sequence %d: Request timed out' % (i + 1))
-
-clientSocket.close()

code/ch_socket/UDP_Pinger_Server.py

@@ -1,11 +0,0 @@
-import random
-from socket import *
-serverSocket = socket(AF_INET, SOCK_DGRAM)
-serverSocket.bind(('', 12000))
-while True:
-	rand = random.randint(0, 10)
-	message, address = serverSocket.recvfrom(1024)
-	message = message.upper()
-	if (rand < 4):
-		continue
-	serverSocket.sendto(message, address)

data/appendix/cheat_sheet.tex

@@ -9,7 +9,7 @@
 
 \begin{itemize}
   \item \textbf{基本信息：} 
-  表\ref{tab:a:csheet:basic}汇总了本指导书所收录的实验的实验目的、
+  表\ref{tab:a:csheet:basic}汇总了本指导书所收录实验的实验目的、
   难度与建议的课时安排等基本信息；
 
   \item \textbf{实验任务与要求：}