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Refs #35581 -- Added tests for email parameters, attachments, MIME structure, bcc header, encoding and sending.
This commit is contained in:
Mike Edmunds
Sarah Boyce
parent
5d7001b578
commit
ea34de3bd7
@ -7,11 +7,15 @@ import tempfile
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from email import charset, message_from_binary_file
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from email import message_from_bytes as _message_from_bytes
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from email import policy
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from email.message import EmailMessage as PyEmailMessage
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from email.message import Message as PyMessage
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from email.mime.image import MIMEImage
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from email.mime.text import MIMEText
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from io import StringIO
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from pathlib import Path
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from smtplib import SMTP, SMTPException
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from ssl import SSLError
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from textwrap import dedent
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from unittest import mock, skipUnless
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from django.core import mail
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@ -139,6 +143,26 @@ class MailTestsMixin:
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for attachment in self.get_raw_attachments(django_message)
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]
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def get_message_structure(self, message, level=0):
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"""
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Return a multiline indented string representation
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of the message's MIME content-type structure, e.g.:
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multipart/mixed
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multipart/alternative
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text/plain
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text/html
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image/jpg
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text/calendar
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"""
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# Adapted from email.iterators._structure().
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indent = " " * (level * 4)
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structure = [f"{indent}{message.get_content_type()}\n"]
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if message.is_multipart():
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for subpart in message.get_payload():
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structure.append(self.get_message_structure(subpart, level + 1))
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return "".join(structure)
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class MailTests(MailTestsMixin, SimpleTestCase):
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"""
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@ -299,6 +323,20 @@ class MailTests(MailTestsMixin, SimpleTestCase):
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).message()
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self.assertEqual(message.get_all("Cc"), ["foo@example.com"])
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def test_bcc_not_in_headers(self):
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"""
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A bcc address should be in the recipients,
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but not in the (visible) message headers.
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"""
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email = EmailMessage(
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to=["to@example.com"],
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bcc=["bcc@example.com"],
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)
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message = email.message()
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self.assertNotIn("Bcc", message)
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self.assertNotIn("bcc@example.com", message.as_string())
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self.assertEqual(email.recipients(), ["to@example.com", "bcc@example.com"])
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def test_reply_to(self):
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email = EmailMessage(
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"Subject",
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@ -875,6 +913,97 @@ class MailTests(MailTestsMixin, SimpleTestCase):
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self.assertEqual(content, b"\xff")
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self.assertEqual(mimetype, "application/octet-stream")
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def test_attach_mime_image(self):
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"""
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EmailMessage.attach() docs: "You can pass it
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a single argument that is a MIMEBase instance."
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"""
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# This also verifies complex attachments with extra header fields.
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email = EmailMessage()
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image = MIMEImage(b"GIF89a...", "gif")
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image["Content-Disposition"] = "inline"
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image["Content-ID"] = "<content-id@example.org>"
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email.attach(image)
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attachments = self.get_raw_attachments(email)
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self.assertEqual(len(attachments), 1)
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image_att = attachments[0]
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self.assertEqual(image_att.get_content_type(), "image/gif")
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self.assertEqual(image_att.get_content_disposition(), "inline")
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self.assertEqual(image_att["Content-ID"], "<content-id@example.org>")
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self.assertEqual(image_att.get_content(), b"GIF89a...")
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self.assertIsNone(image_att.get_filename())
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def test_attach_mime_image_in_constructor(self):
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image = MIMEImage(b"\x89PNG...", "png")
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image["Content-Disposition"] = "attachment; filename=test.png"
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email = EmailMessage(attachments=[image])
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attachments = self.get_raw_attachments(email)
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self.assertEqual(len(attachments), 1)
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image_att = attachments[0]
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self.assertEqual(image_att.get_content_type(), "image/png")
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self.assertEqual(image_att.get_content(), b"\x89PNG...")
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self.assertEqual(image_att.get_content_disposition(), "attachment")
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self.assertEqual(image_att.get_filename(), "test.png")
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def test_attach_rfc822_message(self):
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"""
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EmailMessage.attach() docs: "If you specify a mimetype of message/rfc822,
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it will also accept django.core.mail.EmailMessage and email.message.Message."
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"""
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# django.core.mail.EmailMessage
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django_email = EmailMessage("child subject", "child body")
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# email.message.Message
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py_message = PyMessage()
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py_message["Subject"] = "child subject"
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py_message.set_payload("child body")
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# email.message.EmailMessage
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py_email_message = PyEmailMessage()
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py_email_message["Subject"] = "child subject"
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py_email_message.set_content("child body")
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cases = [
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django_email,
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py_message,
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py_email_message,
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# Should also allow message serialized as str or bytes.
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py_message.as_string(),
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py_message.as_bytes(),
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]
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for child_message in cases:
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with self.subTest(child_type=child_message.__class__):
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email = EmailMessage("parent message", "parent body")
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email.attach(content=child_message, mimetype="message/rfc822")
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self.assertEqual(len(email.attachments), 1)
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self.assertIsInstance(email.attachments[0], EmailAttachment)
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self.assertEqual(email.attachments[0].mimetype, "message/rfc822")
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# Make sure it is serialized correctly: a message/rfc822 attachment
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# whose "body" content (payload) is the "encapsulated" (child) message.
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attachments = self.get_raw_attachments(email)
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self.assertEqual(len(attachments), 1)
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rfc822_attachment = attachments[0]
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self.assertEqual(rfc822_attachment.get_content_type(), "message/rfc822")
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attached_message = rfc822_attachment.get_content()
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self.assertEqual(attached_message["Subject"], "child subject")
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self.assertEqual(attached_message.get_content().rstrip(), "child body")
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# Regression for #18967: Per RFC 2046 5.2.1, "No encoding other
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# than '7bit', '8bit', or 'binary' is permitted for the body of
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# a 'message/rfc822' entity." (Default CTE is "7bit".)
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cte = rfc822_attachment.get("Content-Transfer-Encoding", "7bit")
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self.assertIn(cte, ("7bit", "8bit", "binary"))
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# Any properly declared CTE is allowed for the attached message itself
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# (including quoted-printable or base64). For the plain ASCII content
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# in this test, we'd expect 7bit.
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child_cte = attached_message.get("Content-Transfer-Encoding", "7bit")
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self.assertEqual(child_cte, "7bit")
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self.assertEqual(attached_message.get_content_type(), "text/plain")
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def test_attach_mimebase_prohibits_other_params(self):
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email_msg = EmailMessage()
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txt = MIMEText("content")
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@ -1039,63 +1168,6 @@ class MailTests(MailTestsMixin, SimpleTestCase):
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s = msg.message().as_string()
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self.assertIn("Content-Transfer-Encoding: 8bit", s)
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def test_dont_base64_encode_message_rfc822(self):
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# Ticket #18967
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# Shouldn't use base64 encoding for a child EmailMessage attachment.
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# Create a child message first
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child_msg = EmailMessage(
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"Child Subject",
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"Some body of child message",
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"bounce@example.com",
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["to@example.com"],
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headers={"From": "from@example.com"},
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)
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child_s = child_msg.message().as_string()
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# Now create a parent
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parent_msg = EmailMessage(
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"Parent Subject",
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"Some parent body",
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"bounce@example.com",
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["to@example.com"],
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headers={"From": "from@example.com"},
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)
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# Attach to parent as a string
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parent_msg.attach(content=child_s, mimetype="message/rfc822")
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parent_s = parent_msg.message().as_string()
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# The child message header is not base64 encoded
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self.assertIn("Child Subject", parent_s)
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# Feature test: try attaching email.Message object directly to the mail.
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parent_msg = EmailMessage(
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"Parent Subject",
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"Some parent body",
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"bounce@example.com",
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["to@example.com"],
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headers={"From": "from@example.com"},
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)
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parent_msg.attach(content=child_msg.message(), mimetype="message/rfc822")
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parent_s = parent_msg.message().as_string()
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# The child message header is not base64 encoded
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self.assertIn("Child Subject", parent_s)
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# Feature test: try attaching Django's EmailMessage object directly to the mail.
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parent_msg = EmailMessage(
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"Parent Subject",
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"Some parent body",
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"bounce@example.com",
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["to@example.com"],
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headers={"From": "from@example.com"},
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)
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parent_msg.attach(content=child_msg, mimetype="message/rfc822")
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parent_s = parent_msg.message().as_string()
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# The child message header is not base64 encoded
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self.assertIn("Child Subject", parent_s)
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def test_custom_utf8_encoding(self):
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"""A UTF-8 charset with a custom body encoding is respected."""
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body = "Body with latin characters: àáä."
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@ -1239,6 +1311,121 @@ class MailTests(MailTestsMixin, SimpleTestCase):
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with self.assertRaisesMessage(ValueError, msg):
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email_msg.attach_alternative("<p>content</p>", None)
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def test_mime_structure(self):
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"""
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Check generated messages have the expected MIME parts and nesting.
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"""
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html_body = EmailAlternative("<p>HTML</p>", "text/html")
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image = EmailAttachment("image.gif", b"\x89PNG...", "image/png")
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rfc822_attachment = EmailAttachment(
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None, EmailMessage(body="text"), "message/rfc822"
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)
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cases = [
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# name, email (EmailMessage or subclass), expected structure
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(
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"single body",
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EmailMessage(body="text"),
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"""
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text/plain
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""",
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),
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(
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"single body with attachment",
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EmailMessage(body="text", attachments=[image]),
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"""
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multipart/mixed
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text/plain
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image/png
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""",
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),
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(
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"alternative bodies",
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EmailMultiAlternatives(body="text", alternatives=[html_body]),
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"""
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multipart/alternative
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text/plain
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text/html
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""",
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),
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(
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"alternative bodies with attachments",
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EmailMultiAlternatives(
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body="text", alternatives=[html_body], attachments=[image]
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),
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"""
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multipart/mixed
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multipart/alternative
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text/plain
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text/html
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image/png
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""",
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),
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(
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"alternative bodies with rfc822 attachment",
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EmailMultiAlternatives(
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body="text",
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alternatives=[html_body],
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attachments=[rfc822_attachment],
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),
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"""
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multipart/mixed
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multipart/alternative
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text/plain
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text/html
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message/rfc822
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text/plain
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""",
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),
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(
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"attachment only",
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EmailMessage(attachments=[image]),
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# Avoid empty text/plain body.
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"""
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multipart/mixed
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image/png
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""",
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),
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(
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"alternative only",
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EmailMultiAlternatives(alternatives=[html_body]),
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# Avoid empty text/plain body.
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"""
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multipart/alternative
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text/html
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""",
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),
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(
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"alternative and attachment only",
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EmailMultiAlternatives(alternatives=[html_body], attachments=[image]),
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"""
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multipart/mixed
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multipart/alternative
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text/html
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image/png
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""",
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),
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(
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"empty EmailMessage",
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EmailMessage(),
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"""
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text/plain
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""",
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),
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(
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"empty EmailMultiAlternatives",
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EmailMultiAlternatives(),
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"""
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text/plain
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""",
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),
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]
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for name, email, expected in cases:
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expected = dedent(expected).lstrip()
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with self.subTest(name=name):
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message = email.message()
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structure = self.get_message_structure(message)
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self.assertEqual(structure, expected)
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def test_body_contains(self):
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email_msg = EmailMultiAlternatives()
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email_msg.body = "I am content."
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@ -1257,6 +1444,114 @@ class MailTests(MailTestsMixin, SimpleTestCase):
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email_msg.attach_alternative(b"I am a song.", "audio/mpeg")
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self.assertIs(email_msg.body_contains("I am content"), True)
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def test_all_params_optional(self):
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"""
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EmailMessage class docs: "All parameters are optional"
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"""
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email = EmailMessage()
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self.assertIsInstance(email.message(), PyMessage) # force serialization.
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email = EmailMultiAlternatives()
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self.assertIsInstance(email.message(), PyMessage) # force serialization.
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def test_positional_arguments_order(self):
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"""
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EmailMessage class docs: "… is initialized with the following parameters
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(in the given order, if positional arguments are used)."
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"""
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connection = mail.get_connection()
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email = EmailMessage(
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# (If you need to insert/remove/reorder any params here,
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# that indicates a breaking change to documented behavior.)
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"subject",
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"body",
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"from@example.com",
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["to@example.com"],
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["bcc@example.com"],
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connection,
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[EmailAttachment("file.txt", "attachment", "text/plain")],
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{"X-Header": "custom header"},
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["cc@example.com"],
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["reply-to@example.com"],
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# (New options can be added below here, ideally as keyword-only args.)
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)
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message = email.message()
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self.assertEqual(message.get_all("Subject"), ["subject"])
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self.assertEqual(message.get_all("From"), ["from@example.com"])
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self.assertEqual(message.get_all("To"), ["to@example.com"])
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self.assertEqual(message.get_all("X-Header"), ["custom header"])
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self.assertEqual(message.get_all("Cc"), ["cc@example.com"])
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self.assertEqual(message.get_all("Reply-To"), ["reply-to@example.com"])
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self.assertEqual(message.get_payload(0).get_payload(), "body")
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self.assertEqual(
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self.get_decoded_attachments(email),
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[("file.txt", "attachment", "text/plain")],
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)
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self.assertEqual(
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email.recipients(), ["to@example.com", "cc@example.com", "bcc@example.com"]
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)
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self.assertIs(email.get_connection(), connection)
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def test_all_params_can_be_set_before_send(self):
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"""
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EmailMessage class docs: "All parameters … can be set at any time
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prior to calling the send() method."
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"""
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# This is meant to verify EmailMessage.__init__() doesn't apply any
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# special processing that would be missing for properties set later.
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original_connection = mail.get_connection(username="original")
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new_connection = mail.get_connection(username="new")
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email = EmailMessage(
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"original subject",
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"original body",
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"original-from@example.com",
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["original-to@example.com"],
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["original-bcc@example.com"],
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original_connection,
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[EmailAttachment("original.txt", "original attachment", "text/plain")],
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{"X-Header": "original header"},
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["original-cc@example.com"],
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["original-reply-to@example.com"],
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)
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email.subject = "new subject"
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email.body = "new body"
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email.from_email = "new-from@example.com"
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email.to = ["new-to@example.com"]
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email.bcc = ["new-bcc@example.com"]
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email.connection = new_connection
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email.attachments = [
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("new1.txt", "new attachment 1", "text/plain"), # plain tuple.
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EmailAttachment("new2.txt", "new attachment 2", "text/csv"),
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MIMEImage(b"GIF89a...", "gif"),
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]
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email.extra_headers = {"X-Header": "new header"}
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email.cc = ["new-cc@example.com"]
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email.reply_to = ["new-reply-to@example.com"]
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message = email.message()
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self.assertEqual(message.get_all("Subject"), ["new subject"])
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self.assertEqual(message.get_all("From"), ["new-from@example.com"])
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self.assertEqual(message.get_all("To"), ["new-to@example.com"])
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self.assertEqual(message.get_all("X-Header"), ["new header"])
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self.assertEqual(message.get_all("Cc"), ["new-cc@example.com"])
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self.assertEqual(message.get_all("Reply-To"), ["new-reply-to@example.com"])
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self.assertEqual(message.get_payload(0).get_payload(), "new body")
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self.assertEqual(
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self.get_decoded_attachments(email),
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[
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("new1.txt", "new attachment 1", "text/plain"),
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("new2.txt", "new attachment 2", "text/csv"),
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(None, b"GIF89a...", "image/gif"),
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],
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)
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self.assertEqual(
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email.recipients(),
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["new-to@example.com", "new-cc@example.com", "new-bcc@example.com"],
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)
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self.assertIs(email.get_connection(), new_connection)
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self.assertNotIn("original", message.as_string())
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@requires_tz_support
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class MailTimeZoneTests(MailTestsMixin, SimpleTestCase):
|
||||
@ -1806,6 +2101,7 @@ class ConsoleBackendTests(BaseEmailBackendTests, SimpleTestCase):
|
||||
class SMTPHandler:
|
||||
def __init__(self, *args, **kwargs):
|
||||
self.mailbox = []
|
||||
self.smtp_envelopes = []
|
||||
|
||||
async def handle_DATA(self, server, session, envelope):
|
||||
data = envelope.content
|
||||
@ -1820,10 +2116,17 @@ class SMTPHandler:
|
||||
if mail_from != header_from:
|
||||
return f"553 '{mail_from}' != '{header_from}'"
|
||||
self.mailbox.append(message)
|
||||
self.smtp_envelopes.append(
|
||||
{
|
||||
"mail_from": envelope.mail_from,
|
||||
"rcpt_tos": envelope.rcpt_tos,
|
||||
}
|
||||
)
|
||||
return "250 OK"
|
||||
|
||||
def flush_mailbox(self):
|
||||
self.mailbox[:] = []
|
||||
self.smtp_envelopes[:] = []
|
||||
|
||||
|
||||
@skipUnless(HAS_AIOSMTPD, "No aiosmtpd library detected.")
|
||||
@ -1870,6 +2173,9 @@ class SMTPBackendTests(BaseEmailBackendTests, SMTPBackendTestsBase):
|
||||
def get_mailbox_content(self):
|
||||
return self.smtp_handler.mailbox
|
||||
|
||||
def get_smtp_envelopes(self):
|
||||
return self.smtp_handler.smtp_envelopes
|
||||
|
||||
@override_settings(
|
||||
EMAIL_HOST_USER="not empty username",
|
||||
EMAIL_HOST_PASSWORD="not empty password",
|
||||
@ -2094,6 +2400,85 @@ class SMTPBackendTests(BaseEmailBackendTests, SMTPBackendTestsBase):
|
||||
sent = backend.send_messages([email])
|
||||
self.assertEqual(sent, 0)
|
||||
|
||||
def test_avoids_sending_to_invalid_addresses(self):
|
||||
"""
|
||||
Verify invalid addresses can't sneak into SMTP commands through
|
||||
EmailMessage.all_recipients() (which is distinct from message header fields).
|
||||
"""
|
||||
backend = smtp.EmailBackend()
|
||||
backend.connection = mock.Mock()
|
||||
for email_address in (
|
||||
# Invalid address with two @ signs.
|
||||
"to@other.com@example.com",
|
||||
# Invalid address without the quotes.
|
||||
"to@other.com <to@example.com>",
|
||||
# Other invalid addresses.
|
||||
"@",
|
||||
"to@",
|
||||
"@example.com",
|
||||
# CR/NL in addr-spec. (SMTP strips display-name.)
|
||||
'"evil@example.com\r\nto"@example.com',
|
||||
"to\nevil@example.com",
|
||||
):
|
||||
with self.subTest(email_address=email_address):
|
||||
# Use bcc (which is only processed by SMTP backend) to ensure
|
||||
# error is coming from SMTP backend, not EmailMessage.message().
|
||||
email = EmailMessage(bcc=[email_address])
|
||||
with self.assertRaisesMessage(ValueError, "Invalid address"):
|
||||
backend.send_messages([email])
|
||||
|
||||
def test_encodes_idna_in_smtp_commands(self):
|
||||
"""
|
||||
SMTP backend must encode non-ASCII domains for the SMTP envelope
|
||||
(which can be distinct from the email headers).
|
||||
"""
|
||||
email = EmailMessage(
|
||||
from_email="lists@discussão.example.org",
|
||||
to=["To Example <to@漢字.example.com>"],
|
||||
bcc=["monitor@discussão.example.org"],
|
||||
headers={
|
||||
"From": "Gestor de listas <lists@discussão.example.org>",
|
||||
"To": "Discussão Django <django@discussão.example.org>",
|
||||
},
|
||||
)
|
||||
backend = smtp.EmailBackend()
|
||||
backend.send_messages([email])
|
||||
envelope = self.get_smtp_envelopes()[0]
|
||||
self.assertEqual(envelope["mail_from"], "lists@xn--discusso-xza.example.org")
|
||||
self.assertEqual(
|
||||
envelope["rcpt_tos"],
|
||||
["to@xn--p8s937b.example.com", "monitor@xn--discusso-xza.example.org"],
|
||||
)
|
||||
|
||||
def test_does_not_reencode_idna(self):
|
||||
"""
|
||||
SMTP backend should not downgrade IDNA 2008 to IDNA 2003.
|
||||
|
||||
Django does not currently handle IDNA 2008 encoding, but should retain
|
||||
it for addresses that have been pre-encoded.
|
||||
"""
|
||||
# Test all four EmailMessage attrs accessed by the SMTP email backend.
|
||||
# These are IDNA 2008 encoded domains that would be different
|
||||
# in IDNA 2003, from https://www.unicode.org/reports/tr46/#Deviations.
|
||||
email = EmailMessage(
|
||||
from_email='"βόλος" <from@xn--fa-hia.example.com>',
|
||||
to=['"faß" <to@xn--10cl1a0b660p.example.com>'],
|
||||
cc=['"ශ්රී" <cc@xn--nxasmm1c.example.com>'],
|
||||
bcc=['"نامهای." <bcc@xn--mgba3gch31f060k.example.com>'],
|
||||
)
|
||||
backend = smtp.EmailBackend()
|
||||
backend.send_messages([email])
|
||||
envelope = self.get_smtp_envelopes()[0]
|
||||
self.assertEqual(envelope["mail_from"], "from@xn--fa-hia.example.com")
|
||||
self.assertEqual(
|
||||
envelope["rcpt_tos"],
|
||||
[
|
||||
"to@xn--10cl1a0b660p.example.com",
|
||||
"cc@xn--nxasmm1c.example.com",
|
||||
"bcc@xn--mgba3gch31f060k.example.com",
|
||||
],
|
||||
)
|
||||
|
||||
|
||||
@skipUnless(HAS_AIOSMTPD, "No aiosmtpd library detected.")
|
||||
class SMTPBackendStoppedServerTests(SMTPBackendTestsBase):
|
||||
|
||||
Loading…
Reference in New Issue
Block a user