我試圖弄清楚為什么到 smtp.gmail.com 的 TLS 連接不起作用，代碼包括import ssl并且我在 STARTTLS 命令之前和之后都做了 HELO，然后我用ssl_wrap. 我正在輸入我的電子郵件地址和密碼進行授權。需要注意的一件事是我無法使用 smtplib。有誰知道我做錯了什么？我可以繼續檢查錯誤編號是否可能有誤，但它似乎在授權時崩潰了。
這是控制臺中的輸出，在最后一行之后我按回車鍵并不斷獲得空格：
這是代碼：
from socket import *
import ssl
import base64
msg = "\r\n I love computer networks!"
endmsg = "\r\n.\r\n"
#----------------------------------------------------------------------
# Choose a mail server (e.g. Google mail server) and call it mailserver
#----------------------------------------------------------------------
mailserver = 'smtp.gmail.com'
#mailServer = 'localhost'
mailPort = 587 #25 is standard smtp, 465 is for SSL and 587 for TLS
#---------------------------------------------------------------------------------
# Create socket called clientSocket and establish a TCP connection with mailserver
#---------------------------------------------------------------------------------
clientSocket = socket(AF_INET, SOCK_STREAM)
clientSocket.connect((mailserver, mailPort))
recv1 = clientSocket.recv(1024).decode()
print(recv1)
if recv1[:3] != '220': #250, 530
print('220 reply not received from server.')
#---------------------------------------------
# Send HELO command and print server response.
#---------------------------------------------
heloCommand = 'HELO Shane\r\n'
clientSocket.sendall(heloCommand.encode())
recv3 = clientSocket.recv(1024).decode()
print(recv3)
if recv3[:3] != '530': #250
print('530 reply not received from server.')
#--------------------------------
# Request an encrypted connection
#--------------------------------
command = 'STARTTLS\r\n'.encode()
clientSocket.send(command)
recv2 = clientSocket.recv(1024).decode()
print(recv2)
if recv2[:3] != '220':
print('recv2:220 reply not received from server')
#-------------------
# Encrypt the socket
#-------------------
ssl_clientSocket = ssl.wrap_socket(clientSocket)
#---------------------------------------------
# Send HELO command and print server response.
#---------------------------------------------
heloCommand = 'HELO Shane\r\n'
ssl_clientSocket.sendall(heloCommand.encode())
recv3 = ssl_clientSocket.recv(1024).decode()
#print(recv3)
if recv3[:3] != '530': #250
print('530 reply not received from server.')
#---------------------------------------------
# Send the AUTH LOGIN command and print server response.
#---------------------------------------------
authCommand = 'AUTH LOGIN\r\n'
ssl_clientSocket.write(authCommand.encode())
auth_recv = ssl_clientSocket.read(1024)
if auth_recv[:3] != '334':
print ('334 reply not received from server')
#---------------------------------------------
# Send username and print server response.
#---------------------------------------------
username = input("Type your username and press enter:")
uname = base64.b64encode(username.encode())
print('\r\n')
ssl_clientSocket.write(uname)
uname_recv = ssl_clientSocket.read(1024)
if uname_recv[:3] != '334':
print ('334 reply not received from server')
#---------------------------------------------
# Send password and print server response.
#---------------------------------------------
password = input("Type your password and press enter:")
pword = base64.b64encode(password.encode())
#print('\r\n')
ssl_clientSocket.write(pword)
pword_recv = ssl_clientSocket.read(1024)
if pword_recv[:3] != '235':
print ('235 reply not received from server')
#--------------------------------------------------
# Send MAIL FROM command and print server response.
#--------------------------------------------------
mailfromCommand = 'MAIL FROM: <[email protected]>\r\n'
ssl_clientSocket.sendall(mailfromCommand.encode())
recv4 = ssl_clientSocket.recv(1024)
print(recv4)
if recv4[:3] != '530': #250, 530
print('530 reply not received from server.')
#-------------------------------------------------
# Send RCPT TO command and print server response.
#-------------------------------------------------
rcpttoCommand = 'RCPT TO: <[email protected]>\r\n'
ssl_clientSocket.sendall(rcpttoCommand.encode())
recv5 = ssl_clientSocket.recv(1024)
print(recv5)
if recv5[:3] != '530': #250
print('rcpt to 530 reply not received from server.')
#---------------------------------------------
# Send DATA command and print server response.
#---------------------------------------------
dataCommand = 'Data\r\n'
print(dataCommand)
ssl_clientSocket.sendall(dataCommand.encode())
recv6 = ssl_clientSocket.recv(1024)
print(recv6)
if recv6[:3] != '530': #250? 354, 530
print('data 530 reply not received from server.')
#---------------------------------------------
# Send message data.
#---------------------------------------------
message = 'SUBJECT: Obsidian made my best Fallout game'
fallout76 = 'SUBJECT: I’m sorry about Fallout 76\r\n'
ssl_clientSocket.send(fallout76.encode())
ssl_clientSocket.send(message.encode())
ssl_clientSocket.send(msg.encode())
#---------------------------------------------
# Message ends with a single period.
#---------------------------------------------
ssl_clientSocket.sendall(message.encode() endmsg.encode())
recv7 = ssl_clientSocket.recv(1024)
print(recv7)
if recv7[:3] != '530': #250, 530
print('end msg 530 reply not received from server.')
#---------------------------------------------
# Send QUIT command and get server response.
#---------------------------------------------
quitCommand = 'Quit\r\n'
print(quitCommand)
ssl_clientSocket.sendall(quitCommand.encode())
recv8 = ssl_clientSocket.recv(1024)
print(recv8)
if recv8[:3] != '221': #250. 221, 530
print('quit 221 reply not received from server.')
uj5u.com熱心網友回復：
到 smtp.gmail.com 的 TLS 連接不起作用
與此宣告相反，TLS 正在作業。TLS 升級成功，否則根本無法進一步通信。但是 TLS 升級后的 HELO 按預期作業并產生“250 smtp.gmail.com 為您服務”。
錯誤的是登錄程序。它無法b"\r\n"在 base64 編碼的用戶名和密碼之后發送。這會導致連接掛起，因為服務器在發回回應之前需要更多資料。
轉載請註明出處，本文鏈接：https://www.uj5u.com/qiye/382251.html