计算机网络自顶向下方法 第二章套接字编程作业 邮件客户 答案

https://github.com/jzplp/Computer-Network-A-Top-Down-Approach-Answer

作业3： 邮件客户

• 官方文档 文档翻译
• 编程作业答案

#改为Python3格式
from socket import *
import base64
# Choose a mail server (e.g. Google mail server) and call it mailserver
mailserver = "smtp.163.com"
mailUser = 'jz163wy'
mailFromAddress = '[email protected]'
mailPassWord = '******'
mailToAddress = '[email protected]'

msg = 'FROM: ' + mailFromAddress + '\r\n'
msg += 'TO: ' + mailToAddress +  '\r\n'
msg += 'Subject: ' + 'test' +  '\r\n'
msg += "\r\n I love computer networks!"
endmsg = "\r\n.\r\n"
# Create socket called clientSocket and establish a TCP connection with mailserver
clientSocket = socket(AF_INET, SOCK_STREAM)
clientSocket.connect((mailserver, 25))

recv = clientSocket.recv(1024)
recv = recv.decode()
print(recv)
if recv[:3] != '220':
    print('220 reply not received from server.')

# Send HELO command and print server response.
heloCommand = 'HELO mailserver\r\n'
while True:
    clientSocket.send(heloCommand.encode())
    recv = clientSocket.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '250':
        break

# 登录过程
loginCommand = 'auth login\r\n'
while True:
    clientSocket.send(loginCommand.encode())
    recv = clientSocket.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '334':
        break

# 邮箱账户经过base64编码
userCommand = base64.b64encode(mailUser.encode()) + b'\r\n'
while True:
    clientSocket.send(userCommand)
    recv = clientSocket.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '334':
        break

# 邮箱密码经过base64编码 这里不展示密码了
passCommand = base64.b64encode(mailPassWord.encode()) + b'\r\n'
while True:
    clientSocket.send(passCommand)
    recv = clientSocket.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '235':
        break

# Send MAIL FROM command and print server response.
MFCommand = 'MAIL FROM: <'+ mailFromAddress + '>\r\n'
while True:
    clientSocket.send(MFCommand.encode())
    recv = clientSocket.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '250':
        break

# Send RCPT TO command and print server response.
RTCommand = 'RCPT TO: <'+ mailToAddress + '>\r\n'
while True:
    clientSocket.send(RTCommand.encode())
    recv = clientSocket.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '250':
        break

# Send DATA command and print server response.
DATACommand = 'DATA\r\n'
while True:
    clientSocket.send(DATACommand.encode())
    recv = clientSocket.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '354':
        break

# Send message data.
clientSocket.send(msg.encode())

# Message ends with a single period.
while True:
    clientSocket.send(endmsg.encode())
    recv = clientSocket.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '250':
        break

# Send QUIT command and get server response.
QUITCommand = 'QUIT\r\n'
while True:
    clientSocket.send(QUITCommand.encode())
    recv = clientSocket.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '221':
        break

• 可选练习1答案 可选练习2答案

#改为Python3格式
from socket import *
import base64
import ssl

# Choose a mail server (e.g. Google mail server) and call it mailserver
mailserver = "smtp.163.com"
mailUser = 'jz163wy'
mailFromAddress = '[email protected]'
mailPassWord = '******'
mailToAddress = '[email protected]'

msg = 'FROM: ' + mailFromAddress + '\r\n'
msg += 'TO: ' + mailToAddress +  '\r\n'
msg += 'Subject: ' + 'test' +  '\r\n'
msg += "\r\n I love computer networks!"
endmsg = "\r\n.\r\n"

# Create socket called clientSocket and establish a TCP connection with mailserver
context = ssl.create_default_context()
clientSocket = socket(AF_INET, SOCK_STREAM)
clientSocket.connect((mailserver, 465))
clientSocketSSL = context.wrap_socket(clientSocket, server_hostname=mailserver)

recv = clientSocketSSL.recv(1024)
recv = recv.decode()
print(recv)
if recv[:3] != '220':
    print('220 reply not received from server.')

# Send HELO command and print server response.
heloCommand = 'HELO mailserver\r\n'
while True:
    clientSocketSSL.send(heloCommand.encode())
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '250':
        break

# 登录过程
loginCommand = 'auth login\r\n'
while True:
    clientSocketSSL.send(loginCommand.encode())
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '334':
        break

# 邮箱账户经过base64编码
userCommand = base64.b64encode(mailUser.encode()) + b'\r\n'
while True:
    clientSocketSSL.send(userCommand)
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '334':
        break

# 邮箱密码经过base64编码 这里不展示密码了
passCommand = base64.b64encode(mailPassWord.encode()) + b'\r\n'
while True:
    clientSocketSSL.send(passCommand)
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '235':
        break

# Send MAIL FROM command and print server response.
MFCommand = 'MAIL FROM: <'+ mailFromAddress + '>\r\n'
while True:
    clientSocketSSL.send(MFCommand.encode())
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '250':
        break

# Send RCPT TO command and print server response.
RTCommand = 'RCPT TO: <'+ mailToAddress + '>\r\n'
while True:
    clientSocketSSL.send(RTCommand.encode())
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '250':
        break

# Send DATA command and print server response.
DATACommand = 'DATA\r\n'
while True:
    clientSocketSSL.send(DATACommand.encode())
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '354':
        break

# Send message data.
clientSocketSSL.send(msg.encode())

# Message ends with a single period.
while True:
    clientSocketSSL.send(endmsg.encode())
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '250':
        break

# Send QUIT command and get server response.
QUITCommand = 'QUIT\r\n'
while True:
    clientSocketSSL.send(QUITCommand.encode())
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '221':
        break

clientSocketSSL.close()

#改为Python3格式
from socket import *
import base64
import ssl

# Choose a mail server (e.g. Google mail server) and call it mailserver
mailserver = "smtp.163.com"
mailUser = 'jz163wy'
mailFromAddress = '[email protected]'
mailPassWord = '******'
mailToAddress = '[email protected]'

# transfer image and html
with open("timg.jpg","rb") as f:
    image_data = base64.b64encode(f.read())
with open("hello.html","rb") as f:
    html_data = base64.b64encode(f.read())

# 构造邮件正文
msg = 'FROM: ' + mailFromAddress + '\r\n'
msg += 'TO: ' + mailToAddress +  '\r\n'
msg += 'Subject: ' + 'text and picture' +  '\r\n'
msg += 'Content-Type:multipart/related; boundary="----=_NextPart_000_0012345JZ"\r\n'
msg += 'MIME-Version: 1.0\r\n'
msg += '\r\n'
msg = msg.encode()
msg += '------=_NextPart_000_0012345JZ\r\n'.encode()
msg += 'Content-Type: text/html; charset=UTF-8\r\n'.encode()
msg += 'Content-Transfer-Encoding: base64\r\n'.encode()
msg += '\r\n'.encode()
msg += html_data
msg += '\r\n'.encode()
msg += '\r\n'.encode()
msg += '------=_NextPart_000_0012345JZ\r\n'.encode()
msg += 'Content-Type: image/jpeg; name="timg.jpg"\r\n'.encode()
msg += 'Content-Transfer-Encoding: base64\r\n'.encode()
msg += 'Content-ID: JZJZJZJZJZJZJZJZ'.encode()
msg += '\r\n'.encode()
msg += image_data + "\r\n".encode()
msg += '\r\n'.encode()
msg += '------=_NextPart_000_0012345JZ--\r\n'.encode()
endmsg = "\r\n.\r\n"

# Create socket called clientSocket and establish a TCP connection with mailserver
context = ssl.create_default_context()
clientSocket = socket(AF_INET, SOCK_STREAM)
clientSocket.connect((mailserver, 465))
clientSocketSSL = context.wrap_socket(clientSocket, server_hostname=mailserver)

recv = clientSocketSSL.recv(1024)
recv = recv.decode()
print(recv)
if recv[:3] != '220':
    print('220 reply not received from server.')

# Send HELO command and print server response.
heloCommand = 'HELO mailserver\r\n'
while True:
    clientSocketSSL.send(heloCommand.encode())
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '250':
        break

# 登录过程
loginCommand = 'auth login\r\n'
while True:
    clientSocketSSL.send(loginCommand.encode())
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '334':
        break

# 邮箱账户经过base64编码
userCommand = base64.b64encode(mailUser.encode()) + b'\r\n'
while True:
    clientSocketSSL.send(userCommand)
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '334':
        break

# 邮箱密码经过base64编码 这里不展示密码了
passCommand = base64.b64encode(mailPassWord.encode()) + b'\r\n'
while True:
    clientSocketSSL.send(passCommand)
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '235':
        break

# Send MAIL FROM command and print server response.
MFCommand = 'MAIL FROM: <'+ mailFromAddress + '>\r\n'
while True:
    clientSocketSSL.send(MFCommand.encode())
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '250':
        break

# Send RCPT TO command and print server response.
RTCommand = 'RCPT TO: <'+ mailToAddress + '>\r\n'
while True:
    clientSocketSSL.send(RTCommand.encode())
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '250':
        break

# Send DATA command and print server response.
DATACommand = 'DATA\r\n'
while True:
    clientSocketSSL.send(DATACommand.encode())
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '354':
        break

# Send message data.
clientSocketSSL.send(msg)

# Message ends with a single period.
while True:
    clientSocketSSL.send(endmsg.encode())
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '250':
        break

# Send QUIT command and get server response.
QUITCommand = 'QUIT\r\n'
while True:
    clientSocketSSL.send(QUITCommand.encode())
    recv = clientSocketSSL.recv(1024)
    recv = recv.decode()
    print(recv)
    if recv[:3] == '221':
        break

clientSocketSSL.close()