Python 3 EmailMessage html消息与图像

Question

我想要获取图像显示为用Python发送的邮件的一部分。在Python文档上有一个不起作用的例子。

from datetime import datetime 
import sys 

import smtplib 

from email.message import EmailMessage 
from email.headerregistry import Address 
from email.utils import make_msgid 



from email.mime.image import MIMEImage 

attachment = '/user/file/test.png' 


import email.policy 
msg = EmailMessage() 
msg['To'] = Address("Srujan", 'myemail@example.com') 
msg['From'] = Address("Srujan", 'myemail@example.com') 
msg['Subject'] = "Nice message goes with it "+str(datetime.now()) 
id = make_msgid() 
msg.set_type('text/html') 
msg.set_content(" This is the Data Message that we want to send") 
html_msg = "<br> <b><u> This is the Text .... </u></b><br> <img src='cid:{image_id}' />".format(image_id=id[1:-1]) 
msg.add_alternative(html_msg, subtype="html") 
image_data = open(attachment, "rb") 
image_mime = MIMEImage(image_data.read()) 
image_data.close() 
msg.add_attachment(image_mime, cid=id, filename = "myown.png" ,) 


try: 
    with smtplib.SMTP('example.com') as s: 
     s.ehlo() 
     s.starttls() 
     s.ehlo() 

     s.send_message(msg) 
     s.close() 
    print("Email sent!") 
except: 
    print("Unable to send the email. Error: ", sys.exc_info()[0]) 
    raise 

夫妇的事情，我注意到：

要：Srujan < “myemail@example.com”>来源：Srujan < “myemail@example.com”>主题：尼斯消息去它2016-01-21 17：39：23.642762 MIME版本：1.0内容类型：multipart/mixed; boundary =“=============== 3463325241650937591 ==”

- =============== 3463325241650937591 == Content-Type ：multipart/alternative; border =“=============== 0739224896516732414 ==”

- =============== 0739224896516732414 == Content-Type：文本/无格式;字符集= “utf-8” 内容传输编码：7位

这是我们想要的数据报文发送

- =============== 0739224896516732414 == Content-Type：text/html;字符集= “UTF-8” 内容传输编码：7位MIME-版本：1.0

这是文本....

- ====== ====== 0739224896516732414 == -

- =============== 3463325241650937591 == 内容类型：信息/ RFC822内容传送编码： 8位内容处理：附件; 文件名= “myown.png” 内容ID： < 20160122013923.64205.76661> MIME-版本：1.0

内容类型：图像/ PNG MIME-版本：1.0内容传输编码： BASE64

iVBORw0KGgoAAAANSUhEUgAAAyAAAAJYCAIAAAAVFBUnAAAABmJLR0QA/WD/AP + gvaeTAAAgAElE QVR4nOzdd2BUVfYH8HNfmZJAChAEQ1FAqoKgCAsWLEgTG4gKP11FQNG1AauIgGBXVhRUsCK4i6gI

现在附加消息具有两个内容类型值秒。电子邮件附带只是文本，并没有图像

我已经成功地用MultiPart类，但希望用EmailMessage实现。

Answer 1

在这个问题上的Python文档是不完整/错误的真是一个耻辱。我想要做同样的事情，得到了同样的问题（附件有两个内容类型）

使用attach()方法，而不是add_attachment()上EmailMessage对象解决了问题。唯一需要注意的是，在做这件事之前，您必须将EmailMessage转换为multipart/mixed类型。举例：

from smtplib import SMTP 
from email.message import EmailMessage 
from email.mime.text import MIMEText 
from email.headerregistry import Address 
from ssl import SSLContext, PROTOCOL_TLSv1_2 

# Creating and populating email data: 
msg = EmailMessage() 
msg['From'] = Address(display_name='Recipient', addr_spec='rcpt@example.org') 
msg['To'] = Address(display_name='Sender', addr_spec='sender@example.org') 
msg['Subject'] = 'An email for you'  
msg.set_content('This should be in the email body') 
# It is possible to use msg.add_alternative() to add HTML content too 

# Attaching content: 
att = MIMEText('This should be in an attached file') # Or use MIMEImage, etc 
# The following line is to control the filename of the attached file 
att.add_header('Content-Disposition', 'attachment', filename='attachment.txt') 
msg.make_mixed() # This converts the message to multipart/mixed 
msg.attach(att) # Don't forget to convert the message to multipart first! 

# Sending the email: 
with SMTP(host='smtp.example.org', port=587) as smtp_server: 
    try: 
     # You can choose SSL/TLS encryption protocol to use as shown 
     # or just call starttls() without parameters 
     smtp_server.starttls(context=SSLContext(PROTOCOL_TLSv1_2)) 
     smtp_server.login(user='user@smtp.example.org', password='password') 
     smtp_server.send_message(msg) 

    except Exception as e:     
     print('Error sending email. Details: {} - {}'.format(e.__class__, e))