Python Sendgrid 发送带有 PDF 附件的电子邮件

Question

我正在尝试将 PDF 文件附加到我使用 sendgrid 发送的电子邮件中。

这是我的代码：

sg = sendgrid.SendGridAPIClient(apikey=os.environ.get('SENDGRID_API_KEY'))

from_email = Email("from@example.com")
subject = "subject"
to_email = Email("to@example.com")
content = Content("text/html", email_body)

pdf = open(pdf_path, "rb").read().encode("base64")
attachment = Attachment()
attachment.set_content(pdf)
attachment.set_type("application/pdf")
attachment.set_filename("test.pdf")
attachment.set_disposition("attachment")
attachment.set_content_id(number)

mail = Mail(from_email, subject, to_email, content)
mail.add_attachment(attachment)

response = sg.client.mail.send.post(request_body=mail.get())

print(response.status_code)
print(response.body)
print(response.headers)

但是 Sendgrid Python 库抛出错误 HTTP 错误 400：错误请求。

我的代码有什么问题？

Answer 1

我找到了解决办法。我替换了这一行：

pdf = open(pdf_path, "rb").read().encode("base64")

由此 :

with open(pdf_path, 'rb') as f:
    data = f.read()

encoded = base64.b64encode(data)

现在可以了。我可以在 set_content 中发送编码文件：

attachment.set_content(encoded)

注意：以上答案适用于 Sendgrid v2 或更低版本。对于 v3 及更高版本，请使用：

encoded = base64.b64encode(data).decode()

Answer 2

这是我的解决方案，适用于 Sendgrid V3

    # Where it was uploaded Path.
    file_path = "MY_FILE_PATH"

    with open(file_path, 'rb') as f:
        data = f.read()

    # Encode contents of file as Base 64
    encoded = base64.b64encode(data).decode()

    """Build attachment"""
    attachment = Attachment()
    attachment.content = encoded
    attachment.type = "application/pdf"
    attachment.filename = "my_pdf_attachment.pdf"
    attachment.disposition = "attachment"
    attachment.content_id = "PDF Document file"

    sg = sendgrid.SendGridAPIClient(apikey=settings.SENDGRID_API_KEY)

    from_email = Email("origin@gmail.com")
    to_email = Email('recipient@gmail.com')
    content = Content("text/html", html_content)

    mail = Mail(from_email, 'Attachment mail PDF', to_email, content)
    mail.add_attachment(attachment)

    try:
        response = sg.client.mail.send.post(request_body=mail.get())
    except urllib.HTTPError as e:
        print(e.read())
        exit()

Answer 3

直接来自 Sendgrid docs:

import urllib.request as urllib
import base64
import os
import json
from sendgrid import SendGridAPIClient
from sendgrid.helpers.mail import (Mail, Attachment, FileContent, FileName, FileType, Disposition, ContentId)

import os
import json
from sendgrid import SendGridAPIClient
from sendgrid.helpers.mail import Mail

message = Mail(
    from_email='from_email@example.com',
    to_emails='to@example.com',
    subject='Sending with Twilio SendGrid is Fun',
    html_content='<strong>and easy to do anywhere, even with Python</strong>')
file_path = 'example.pdf'
with open(file_path, 'rb') as f:
    data = f.read()
    f.close()
encoded = base64.b64encode(data).decode()
attachment = Attachment()
attachment.file_content = FileContent(encoded)
attachment.file_type = FileType('application/pdf')
attachment.file_name = FileName('test_filename.pdf')
attachment.disposition = Disposition('attachment')
attachment.content_id = ContentId('Example Content ID')
message.attachment = attachment
try:
    sendgrid_client = SendGridAPIClient(os.environ.get('SENDGRID_API_KEY'))
    response = sendgrid_client.send(message)
    print(response.status_code)
    print(response.body)
    print(response.headers)
except Exception as e:
    print(e.message)

Answer 4

"How does one attach more than one file to a message?"

构建附加附件：

file_path = 'test_filename1.pdf'
with open(file_path, 'rb') as f:
    data = f.read()
    f.close()
encoded = base64.b64encode(data).decode()
attachment1 = Attachment()
attachment1.file_content = FileContent(encoded)
attachment1.file_type = FileType('application/pdf')
attachment1.file_name = FileName('test_filename1.pdf')
attachment1.disposition = Disposition('attachment')
attachment1.content_id = ContentId('Example Content ID1')

file_path = 'test_filename2.pdf'
with open(file_path, 'rb') as f:
    data = f.read()
    f.close()
encoded = base64.b64encode(data).decode()
attachment2 = Attachment()
attachment2.file_content = FileContent(encoded)
attachment2.file_type = FileType('application/pdf')
attachment2.file_name = FileName('test_filename2.pdf')
attachment2.disposition = Disposition('attachment')
attachment2.content_id = ContentId('Example Content ID2')

mail.attachment = [attachment1,attachment2]

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