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import json
import unittest
from base64 import b64encode
from textwrap import dedent
from unittest.mock import ANY
from django.test import tag
from anymail.exceptions import AnymailConfigurationError
from anymail.inbound import AnymailInboundMessage
from anymail.signals import AnymailInboundEvent
from anymail.webhooks.postal import PostalInboundWebhookView
from .utils import sample_email_content, sample_image_content
from .utils_postal import ClientWithPostalSignature, make_key
from .webhook_cases import WebhookTestCase
@tag("postal")
@unittest.skipUnless(
ClientWithPostalSignature, "Install 'cryptography' to run postal webhook tests"
)
class PostalInboundTestCase(WebhookTestCase):
client_class = ClientWithPostalSignature
def setUp(self):
super().setUp()
self.clear_basic_auth()
self.client.set_private_key(make_key())
def test_inbound_basics(self):
raw_event = {
"id": 233980,
"rcpt_to": "test@inbound.example.com",
"mail_from": "envelope-from@example.org",
"message": b64encode(
dedent(
"""\
Received: from mail.example.org by postal.example.com ...
Received: by mail.example.org for <test@inbound.example.com> ...
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=example.org; ...
MIME-Version: 1.0
Received: by 10.10.1.71 with HTTP; Wed, 11 Oct 2017 18:31:04 -0700 (PDT)
From: "Displayed From" <from+test@example.org>
Date: Wed, 11 Oct 2017 18:31:04 -0700
Message-ID: <CAEPk3R+4Zr@mail.example.org>
Subject: Test subject
To: "Test Inbound" <test@inbound.example.com>, other@example.com
Cc: cc@example.com
Content-Type: multipart/alternative; boundary="94eb2c05e174adb140055b6339c5"
--94eb2c05e174adb140055b6339c5
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
It's a body=E2=80=A6
--94eb2c05e174adb140055b6339c5
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr">It's a body=E2=80=A6</div>
--94eb2c05e174adb140055b6339c5--
""" # NOQA: E501
).encode("utf-8")
).decode("ascii"),
"base64": True,
}
response = self.client.post(
"/anymail/postal/inbound/",
content_type="application/json",
data=json.dumps(raw_event),
)
self.assertEqual(response.status_code, 200)
kwargs = self.assert_handler_called_once_with(
self.inbound_handler,
sender=PostalInboundWebhookView,
event=ANY,
esp_name="Postal",
)
# AnymailInboundEvent
event = kwargs["event"]
self.assertIsInstance(event, AnymailInboundEvent)
self.assertEqual(event.event_type, "inbound")
# Postal doesn't provide inbound event timestamp:
self.assertIsNone(event.timestamp)
self.assertEqual(event.event_id, 233980)
self.assertIsInstance(event.message, AnymailInboundMessage)
self.assertEqual(event.esp_event, raw_event)
# AnymailInboundMessage - convenience properties
message = event.message
self.assertEqual(message.from_email.display_name, "Displayed From")
self.assertEqual(message.from_email.addr_spec, "from+test@example.org")
self.assertEqual(
[str(e) for e in message.to],
["Test Inbound <test@inbound.example.com>", "other@example.com"],
)
self.assertEqual([str(e) for e in message.cc], ["cc@example.com"])
self.assertEqual(message.subject, "Test subject")
self.assertEqual(message.date.isoformat(" "), "2017-10-11 18:31:04-07:00")
self.assertEqual(message.text, "It's a body\N{HORIZONTAL ELLIPSIS}\n")
self.assertEqual(
message.html,
"""<div dir="ltr">It's a body\N{HORIZONTAL ELLIPSIS}</div>\n""",
)
self.assertEqual(message.envelope_sender, "envelope-from@example.org")
self.assertEqual(message.envelope_recipient, "test@inbound.example.com")
self.assertIsNone(message.stripped_text)
self.assertIsNone(message.stripped_html)
self.assertIsNone(message.spam_detected)
self.assertIsNone(message.spam_score)
# AnymailInboundMessage - other headers
self.assertEqual(message["Message-ID"], "<CAEPk3R+4Zr@mail.example.org>")
self.assertEqual(
message.get_all("Received"),
[
"from mail.example.org by postal.example.com ...",
"by mail.example.org for <test@inbound.example.com> ...",
"by 10.10.1.71 with HTTP; Wed, 11 Oct 2017 18:31:04 -0700 (PDT)",
],
)
def test_attachments(self):
image_content = sample_image_content()
email_content = sample_email_content()
raw_mime = dedent(
"""\
MIME-Version: 1.0
From: from@example.org
Subject: Attachments
To: test@inbound.example.com
Content-Type: multipart/mixed; boundary="boundary0"
--boundary0
Content-Type: multipart/related; boundary="boundary1"
--boundary1
Content-Type: text/html; charset="UTF-8"
<div>This is the HTML body. It has an inline image: <img src="cid:abc123">.</div>
--boundary1
Content-Type: image/png
Content-Disposition: inline; filename="image.png"
Content-ID: <abc123>
Content-Transfer-Encoding: base64
{image_content_base64}
--boundary1--
--boundary0
Content-Type: text/plain; charset="UTF-8"
Content-Disposition: attachment; filename="test.txt"
test attachment
--boundary0
Content-Type: message/rfc822; charset="US-ASCII"
Content-Disposition: attachment
X-Comment: (the only valid transfer encodings for message/* are 7bit, 8bit, and binary)
{email_content}
--boundary0--
""" # NOQA: E501
).format(
image_content_base64=b64encode(image_content).decode("ascii"),
email_content=email_content.decode("ascii"),
)
raw_event = {
"id": 233980,
"rcpt_to": "test@inbound.example.com",
"mail_from": "envelope-from@example.org",
"message": b64encode(raw_mime.encode("utf-8")).decode("ascii"),
"base64": True,
}
response = self.client.post(
"/anymail/postal/inbound/",
content_type="application/json",
data=json.dumps(raw_event),
)
self.assertEqual(response.status_code, 200)
kwargs = self.assert_handler_called_once_with(
self.inbound_handler,
sender=PostalInboundWebhookView,
event=ANY,
esp_name="Postal",
)
event = kwargs["event"]
message = event.message
attachments = message.attachments # AnymailInboundMessage convenience accessor
self.assertEqual(len(attachments), 2)
self.assertEqual(attachments[0].get_filename(), "test.txt")
self.assertEqual(attachments[0].get_content_type(), "text/plain")
self.assertEqual(attachments[0].get_content_text(), "test attachment")
self.assertEqual(attachments[1].get_content_type(), "message/rfc822")
self.assertEqualIgnoringHeaderFolding(
attachments[1].get_content_bytes(), email_content
)
inlines = message.content_id_map
self.assertEqual(len(inlines), 1)
inline = inlines["abc123"]
self.assertEqual(inline.get_filename(), "image.png")
self.assertEqual(inline.get_content_type(), "image/png")
self.assertEqual(inline.get_content_bytes(), image_content)
def test_misconfigured_tracking(self):
with self.assertRaisesMessage(
AnymailConfigurationError,
"You seem to have set Postal's *tracking* webhook"
" to Anymail's Postal *inbound* webhook URL.",
):
self.client.post(
"/anymail/postal/inbound/",
content_type="application/json",
data=json.dumps({"status": "Held"}),
)
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