Base64-kodiertes Bild in E-Mail

Question

Ich versuche, HTML-E-Mails mit Base64 kodierten Bildern zu senden, die in ihnen eingebettet sind, mit Gmail API und Python.

Dies ist die HTML-Datei, die ich als E-Mail meine Codes senden möchten

<h1>This is a test message</h1> 
<p> 
<img src="data:image/png;base64,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"> 
</p> 

Hier sind

"""Send an email message from the user's account. 
""" 

import base64 
from email.mime.audio import MIMEAudio 
from email.mime.base import MIMEBase 
from email.mime.image import MIMEImage 
from email.mime.multipart import MIMEMultipart 
from email.mime.text import MIMEText 
import mimetypes 
import os 

from apiclient import errors 



def send_message(service, user_id, message): 
    """Send an email message. 

    Args: 
    service: Authorized Gmail API service instance. 
    user_id: User's email address. The special value "me" 
    can be used to indicate the authenticated user. 
    message: Message to be sent. 

    Returns: 
    Sent Message. 
    """ 
    try: 
    message = (service.users().messages().send(userId=user_id, body=message) 
       .execute()) 
    print 'Message Id: %s' % message['id'] 
    return message 
    except errors.HttpError, error: 
    print 'An error occurred: %s' % error 


def create_message(sender, to, subject, message_text): 
    """Create a message for an email. 

    Args: 
    sender: Email address of the sender. 
    to: Email address of the receiver. 
    subject: The subject of the email message. 
    message_text: The text of the email message. 

    Returns: 
    An object containing a base64url encoded email object. 
    """ 
    message = MIMEText(message_text,'html') 
    message['to'] = to 
    message['from'] = sender 
    message['subject'] = subject 
    return {'raw': base64.urlsafe_b64encode(message.as_string())} 

if __name__ == "__main__": 
    from login import service 

    with open("test.html","rb") as f: 
     message_body = f.read() 

    m = create_message("xxx@gmail.com","xxx@gmail.com","test message",message_body) 

    send_message(service, "me", m) 

Allerdings sehe ich nicht mein Bild in der E-Mail-Inhalte. Wenn ich das Original inspiziere, kann ich sehen, dass mein HTML so falsch formatiert ist;

Content-Type: multipart/alternative; boundary=001a114442124f125f053789c367 

--001a114442124f125f053789c367 
Content-Type: text/plain; charset=UTF-8 

This is a test message 

--001a114442124f125f053789c367 
Content-Type: text/html; charset=UTF-8 
Content-Transfer-Encoding: quoted-printable 

<h1>This is a test message</h1> 
    <p> 
    <img src=3D"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAASwAAAEsCAMAA= 
ABOo35HAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQA= 
AAAZdEVYdFNvZnR3YXJlAFBhaW50Lk5FVCB2My41LjFO5zj5AAAA5FBMVEUAAAAAAAAAAAAAAAA= 
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA= 
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA= 
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA= 
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAWwvIjAAAATHR= 
STlMAAgMEBQYICgsMDQ4QERMUFRYXGBkaGxwdHh8hIyUnKCkrLS4vMTI0Nzg5Ojs8PkJDRUhMTl= 
FSVFhaW19iY2hrbnF0dnd6f4CEiIyPu8o/fwAAB+RJREFUeNrt3WFb00gUhuFDXCoWCpQVFgvNA= 
ksFSoEVRRR1S3HBkvn//2c/zDTJJE3SklDX6TNfQMnpJHcmk0l8uRSxWm1ltUUzbX3lpWS2lfbJ= 
Oc1qp/76wjiq5SNsxrWTRopqYQeWrOa/YFg9dXAtA5LfNmLXIOOqaKKvhVjMV4XtkItwirbFRTh= 
5O9ML1AYSk7RdERHxLcDDPZ5zdPMPrQeaIxGRhdPY3xwsCi1jpV4TkVdxK4Dsth3DWbenrDPGVb= 
K9te+Hr6M/7oGTbLELsSUireiPbXByrsMEVgucZGuBBRZYYIEFFlhggQUWWGCBBRZYYIH1q2K5F= 
XTLTaqVxHIx6JaVVCuJ5WwiaUxSrSSW00G3ZFKtJJbjQbf8wTUllvsZm43KsOYgYxNLqpXEmoeg= 
22FFWPMRdNuqBGtOgm5nL6vAmpeg224VWM4G3cYl1UpiuRx0SyfVSmK5HXRLJtVKYjkedHtbfD+= 
cAsvxoNtO8TuEKbAcD7ptPxeWi29RW2CBBRZYYIEFFlhggQUWWGCBBRZYYIEFFlhggQUWWGCBBR= 
ZYYIEFFlhggQUWWGCBBRZYYIEFFlhggQUWWGCBBRZYYIEFFlhggQUWWGCBBRZYYIEFFlhggQUWW= 
GCBBRZYYIEFFlhggQUWWDPDOvqhwnYrIvLm7treYunjY7RJN1nzTUTkj3+iv1B1Eal/DjxTvvej= 
O20/3ph9S/ezNnOsq1jv6kpE2kr17GN4iG+ym6h5bOqaqB3rmoEp/5CuUR/y++mP2bd0P8HMR9a= 
eShxnLVDKtzb5ZG2yatUEn+uia0bt7o2pudLVv6dqivu5TO1buh8z1GaK9SE8j5t62OwqpZrWJo= 
EeLCLS06czqjFtV4NMVtMs7udSqUFBP4OQdIZYfX1NiMi+3pNjpZS1xaq59kTkWp/OqMa04/g1U= 
VTj61ktr59vSl3n9+MpFazNHCtQqhOeTjMEblOns66/vdenMxoC0fD8llUzSNb0lBpm9WOGzVBP= 
Z9G+pfrZVEF75nfDVaVUKzydZghcJU/nUH9XU0p1rCEQDc/LiWtusvsxw6aulPKtfUv1s9utzX7= 
pYN1e1JGIqOSwsW5jalPX2DNU9ONOcc29UhcZ/ZgZqqWns7a9GLH62f8Z66xu/KD6nshaatjcWg= 
deE+kmZ6g16xMKamr6UMf2Y2aojl5pde21XbwftfkzsK6j/ofvPDP9WsPGs477Ppqyo+aPPqHrF= 
dds6kMd20/HuhleW4uRWD/af/ZYg+QNp5ccNs3UTWqQnKGmqtnXw2ZsTTR7XuXvm5nVZovlpWaO= 
6+TaJjYEAqV61hCYoGaYrLkIh026pj6qCZr5+5ZYpM0Gq5m64YwbNsPozumXrskZnsPRsAl2Cvb= 
tOPb8ODOs/eh0Wnf6WLsJZxuzECpZM9QPOzk1rw9qRfuWWNvPBusiOVdvquRz9X24h129jLywNm= 
nn1xyPq1nLqDFtL9y3VD/BSnjn7M4c60Y92M9n+/EdfFgSqSn1xRsthIKmHgL2YU5b082oiX2kZ= 
PTTCRd2fW/mWN8/1+0NY6fz8f2SiGyG6wEZfG2INQTUj7+Kam5TNf/642tGy4/wP91L9xOuIZqP= 
7zzelPJaGSywwAILLLDAAgsssMACCyywwAILLLDA+mWwvDC+2BYR791QKXUjIuLfmbzbk6KVTmJ= 
5X+LZBq8fhiO7YXzxKdFKN7HC+OLdkoic6+9bOhFphs1TopXOzllNpdTf+qNMPs8kie7HZNcmjF= 
Y6i+VHYQPtUtdJonR2beJopbtYvTBsYFxaOklkvjwlWuku1nWYCDWXU0eHpsyXp0Qr3cUahP/Mb= 
jJ9lzq0Zr5kxiTrHx9Nzj0VrXQWy4uyiyYK2tcrrb4OFGXFJFceRjzpaKWzWE2zHpV4dPtC4nm3= 
sTHJT+FQS0Ur3cXyw18z8qI5yaSx2/kxSTOr9Sq8Gf7PsXrhr0eYfN5ulMZey49WXmbEJN3Fim6= 
GJgraDdPYgeTHJPsZMUlXsWp/3odLzAvtcmWNl7yYZJARk3QUqzN6qvuuXS717e9cj5cjKYxWjo= 
1JuokVJhyDpojcq7slEc+8gFDqH+9pMUlHsb4bqq8NEak9vv9NRJr61zNMPjI3WpkRk+RNKW9Kw= 
QILLLDAAgsssMACCyywwAILLLDAAgsssMACCyywwAILLLDAAgsssMACCyywwAILLLDAAgsssMAC= 
CyywwAILLLDAAgsssMACCyywwAILLLDAAgsssMACCyywwAILLLDAAgsssMpi7YBVULEV/cx3EGu= 
7UqzV6GdHDmLtRYe3XR5r+bz4437d1ogd3UZ5rBdn0Q/PNlyzOo1hrZTHkoPY550ftBxqW+34oZ= 
1KBVivz+ej7VWBtXg2H1irVWDNydDal0qw5HAOrE4WK8KqzcGF2JCKsObgQvSlMizZdnxs+QsVY= 
snykcNUp41pnrUnePRe2HHW6mBRKsYSWfZPHJQ621+f8i3OpC/4XrVca43pX3k5/ja02veDYIEF= 
FlhggQUWWGCBBRZYYIEFFlhggQUWWGCBBdazY+2AU4DleCK5ZEsEmh1PJJdsiUCz24nkki0ZaHY= 
6kVzWKhVodjeR/AyB5nlJJFcSaJ6XRHI1gWaG1jSB5kMsJg8017gQpwg0cyFOE2jeZmxNEWh2Op= 
FceaDZ4UTycwSa3UwkP1+g+RXPOHmB5v8A5Tz/tpGY9IQAAAAASUVORK5CYII=3D"> 
    </p> 

--001a114442124f125f053789c367-- 

Wie Sie sehen können, gibt es eine 3D in <img src=3D"data:image/png;base64 ... Teil eingefügt.

Was ist der richtige Weg, um Bilder in E-Mails mit Google Mail API einzubetten?

Addition

Nach einer weiteren Untersuchung, ich habe erkannt, dass, wenn ich =3D per E-Mail zurück zu = konvertieren, Bild immer noch kaputt ist.

Ich denke, das Problem könnte mit der Tatsache zusammenhängen, dass meine Base64-codierten Daten in mehrere Zeilen im E-Mail-Quellcode aufgeteilt sind.

Answer 1

Anstelle der Verwendung einbetten Base64-Codierung, habe ich beschlossen, Bilder als Anhänge hinzuzufügen. Hier ist meine neue test.html Datei;

<h1>This is a test message</h1> 
    <p> 
    <img src="cid:asdfgh"> 
    </p> 

Und hier ist mein Code

"""Send an email message from the user's account. 
""" 

import base64 
from email.mime.audio import MIMEAudio 
from email.mime.base import MIMEBase 
from email.mime.image import MIMEImage 
from email.mime.multipart import MIMEMultipart 
from email.mime.text import MIMEText 
import mimetypes 
import os 

from apiclient import errors 


def send_message(service, user_id, message): 
    """Send an email message. 

    Args: 
    service: Authorized Gmail API service instance. 
    user_id: User's email address. The special value "me" 
    can be used to indicate the authenticated user. 
    message: Message to be sent. 

    Returns: 
    Sent Message. 
    """ 
    try: 
    message = (service.users().messages().send(userId=user_id, body=message) 
       .execute()) 
    print 'Message Id: %s' % message['id'] 
    return message 
    except errors.HttpError, error: 
    print 'An error occurred: %s' % error 


def create_message(sender, to, subject, message_text): 
    """Create a message for an email. 

    Args: 
    sender: Email address of the sender. 
    to: Email address of the receiver. 
    subject: The subject of the email message. 
    message_text: The text of the email message. 

    Returns: 
    An object containing a base64url encoded email object. 
    """ 
    message = MIMEText(message_text,'html') 
    message['to'] = to 
    message['from'] = sender 
    message['subject'] = subject 
    return {'raw': base64.urlsafe_b64encode(message.as_string())} 

def create_multipart_message(sender, to, subject, message_text): 

     message = MIMEMultipart() 
     message['to'] = to 
     message['from'] = sender 
     message['subject'] = subject 

     msg = MIMEText(message_text,'html') 
     message.attach(msg) 

     return message 

def attach_file_to_multipart_message(message, file, content_id=None): 

    content_type, encoding = mimetypes.guess_type(file) 

    if content_type is None or encoding is not None: 
    content_type = 'application/octet-stream' 

    main_type, sub_type = content_type.split('/', 1) 
    if main_type == 'text': 
    fp = open(file, 'rb') 
    msg = MIMEText(fp.read(), _subtype=sub_type) 
    fp.close() 
    elif main_type == 'image': 
    fp = open(file, 'rb') 
    msg = MIMEImage(fp.read(), _subtype=sub_type) 
    fp.close() 
    elif main_type == 'audio': 
    fp = open(file, 'rb') 
    msg = MIMEAudio(fp.read(), _subtype=sub_type) 
    fp.close() 
    else: 
    fp = open(file, 'rb') 
    msg = MIMEBase(main_type, sub_type) 
    msg.set_payload(fp.read()) 
    fp.close() 
    filename = os.path.basename(file) 
    msg.add_header('Content-Disposition', 'attachment', filename=filename) 
    if content_id: 
    msg.add_header('Content-ID', '<%s>' % content_id) 

    message.attach(msg) 

def finalize_message(message): 
    return {"raw": base64.urlsafe_b64encode(message.as_string())} 

if __name__ == "__main__": 
    from login import service 

    m = create_multipart_message("xxxx@gmail","xxxx@gmail.com","test message", open("test.html").read()) 
    attach_file_to_multipart_message(m, "placeholder.png", "asdfgh") 

    m_final = finalize_message(m) 

    send_message(service, "me", m_final) 

Mit dieser Methode konnte ich die Bilder in meinen HTML-E-Mail zeigen.

Answer 2

Das Zeichen "=" ist ein Escape-Zeichen bei Verwendung von Quoted-Printable HTML, also ist das = 3D nur ein Escape-Zeichen.

Es ist wahrscheinlich etwas anderes falsch mit der E-Mail. Ich denke nicht das = 3D ist es.

Versuchen Sie, Ihre Nachricht an eine Nachricht füttern Dienstprogramm und sehen, ob es sich über irgendetwas beschwert.

https://tools.ietf.org/tools/msglint/