mirror of
https://github.com/paperless-ngx/paperless-ngx.git
synced 2025-07-28 18:24:38 -05:00
first implementation of the mail rework
This commit is contained in:
Jonas Winkler
@@ -1,249 +0,0 @@
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import datetime
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import imaplib
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import logging
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import os
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import re
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import time
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import uuid
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from base64 import b64decode
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from email import policy
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from email.parser import BytesParser
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from dateutil import parser
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from django.conf import settings
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from .models import Correspondent
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class MailFetcherError(Exception):
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pass
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class InvalidMessageError(MailFetcherError):
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pass
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class Loggable(object):
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def __init__(self, group=None):
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self.logger = logging.getLogger(__name__)
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self.logging_group = group or uuid.uuid4()
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def log(self, level, message):
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getattr(self.logger, level)(message, extra={
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"group": self.logging_group
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})
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class Message(Loggable):
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"""
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A crude, but simple email message class. We assume that there's a subject
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and n attachments, and that we don't care about the message body.
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"""
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SECRET = os.getenv("PAPERLESS_EMAIL_SECRET")
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def __init__(self, data, group=None):
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"""
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Cribbed heavily from
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https://www.ianlewis.org/en/parsing-email-attachments-python
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"""
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Loggable.__init__(self, group=group)
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self.subject = None
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self.time = None
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self.attachment = None
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message = BytesParser(policy=policy.default).parsebytes(data)
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self.subject = str(message["Subject"]).replace("\r\n", "")
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self.body = str(message.get_body())
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self.check_subject()
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self.check_body()
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self._set_time(message)
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self.log("info", 'Importing email: "{}"'.format(self.subject))
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attachments = []
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for part in message.walk():
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content_disposition = part.get("Content-Disposition")
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if not content_disposition:
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continue
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dispositions = content_disposition.strip().split(";")
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if len(dispositions) < 2:
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continue
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if not dispositions[0].lower() == "attachment" and \
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"filename" not in dispositions[1].lower():
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continue
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file_data = part.get_payload()
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attachments.append(Attachment(
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b64decode(file_data), content_type=part.get_content_type()))
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if len(attachments) == 0:
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raise InvalidMessageError(
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"There don't appear to be any attachments to this message")
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if len(attachments) > 1:
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raise InvalidMessageError(
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"There's more than one attachment to this message. It cannot "
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"be indexed automatically."
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)
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self.attachment = attachments[0]
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def __bool__(self):
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return bool(self.attachment)
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def check_subject(self):
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if self.subject is None:
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raise InvalidMessageError("Message does not have a subject")
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if not Correspondent.SAFE_REGEX.match(self.subject):
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raise InvalidMessageError("Message subject is unsafe: {}".format(
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self.subject))
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def check_body(self):
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if self.SECRET not in self.body:
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raise InvalidMessageError("The secret wasn't in the body")
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def _set_time(self, message):
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self.time = datetime.datetime.now()
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message_time = message.get("Date")
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if message_time:
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try:
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self.time = parser.parse(message_time)
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except (ValueError, AttributeError):
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pass # We assume that "now" is ok
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@property
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def file_name(self):
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return "{}.{}".format(self.subject, self.attachment.suffix)
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class Attachment(object):
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SAFE_SUFFIX_REGEX = re.compile(
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r"^(application/(pdf))|(image/(png|jpeg|gif|tiff))$")
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def __init__(self, data, content_type):
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self.content_type = content_type
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self.data = data
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self.suffix = None
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m = self.SAFE_SUFFIX_REGEX.match(self.content_type)
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if not m:
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raise MailFetcherError(
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"Not-awesome file type: {}".format(self.content_type))
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self.suffix = m.group(2) or m.group(4)
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def read(self):
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return self.data
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class MailFetcher(Loggable):
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def __init__(self, consume=settings.CONSUMPTION_DIR):
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Loggable.__init__(self)
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self._connection = None
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self._host = os.getenv("PAPERLESS_CONSUME_MAIL_HOST")
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self._port = os.getenv("PAPERLESS_CONSUME_MAIL_PORT")
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self._username = os.getenv("PAPERLESS_CONSUME_MAIL_USER")
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self._password = os.getenv("PAPERLESS_CONSUME_MAIL_PASS")
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self._inbox = os.getenv("PAPERLESS_CONSUME_MAIL_INBOX", "INBOX")
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self._enabled = bool(self._host)
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if self._enabled and Message.SECRET is None:
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raise MailFetcherError("No PAPERLESS_EMAIL_SECRET defined")
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self.last_checked = time.time()
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self.consume = consume
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def pull(self):
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"""
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Fetch all available mail at the target address and store it locally in
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the consumption directory so that the file consumer can pick it up and
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do its thing.
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"""
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if self._enabled:
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# Reset the grouping id for each fetch
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self.logging_group = uuid.uuid4()
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self.log("debug", "Checking mail")
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for message in self._get_messages():
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self.log("info", 'Storing email: "{}"'.format(message.subject))
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t = int(time.mktime(message.time.timetuple()))
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file_name = os.path.join(self.consume, message.file_name)
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with open(file_name, "wb") as f:
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f.write(message.attachment.data)
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os.utime(file_name, times=(t, t))
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self.last_checked = time.time()
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def _get_messages(self):
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r = []
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try:
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self._connect()
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self._login()
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for message in self._fetch():
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if message:
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r.append(message)
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self._connection.expunge()
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self._connection.close()
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self._connection.logout()
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except MailFetcherError as e:
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self.log("error", str(e))
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return r
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def _connect(self):
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try:
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self._connection = imaplib.IMAP4_SSL(self._host, self._port)
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except OSError as e:
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msg = "Problem connecting to {}: {}".format(self._host, e.strerror)
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raise MailFetcherError(msg)
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def _login(self):
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login = self._connection.login(self._username, self._password)
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if not login[0] == "OK":
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raise MailFetcherError("Can't log into mail: {}".format(login[1]))
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inbox = self._connection.select(self._inbox)
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if not inbox[0] == "OK":
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raise MailFetcherError("Can't find the inbox: {}".format(inbox[1]))
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def _fetch(self):
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for num in self._connection.search(None, "ALL")[1][0].split():
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__, data = self._connection.fetch(num, "(RFC822)")
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message = None
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try:
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message = Message(data[0][1], self.logging_group)
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except InvalidMessageError as e:
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self.log("error", str(e))
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else:
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self._connection.store(num, "+FLAGS", "\\Deleted")
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if message:
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yield message
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@@ -37,7 +37,7 @@ class Handler(FileSystemEventHandler):
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class Command(BaseCommand):
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"""
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On every iteration of an infinite loop, consume what we can from the
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consumption directory, and fetch any mail available.
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consumption directory.
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"""
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def __init__(self, *args, **kwargs):
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@@ -45,10 +45,6 @@ class Command(BaseCommand):
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self.verbosity = 0
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self.logger = logging.getLogger(__name__)
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self.file_consumer = None
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self.mail_fetcher = None
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self.first_iteration = True
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self.consumer = Consumer()
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BaseCommand.__init__(self, *args, **kwargs)
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@@ -9,13 +9,11 @@ from django_q.tasks import schedule
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def add_schedules(apps, schema_editor):
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schedule('documents.tasks.train_classifier', name="Train the classifier", schedule_type=Schedule.HOURLY)
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schedule('documents.tasks.index_optimize', name="Optimize the index", schedule_type=Schedule.DAILY)
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schedule('documents.tasks.consume_mail', name="Check E-Mail", schedule_type=Schedule.MINUTES, minutes=10)
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def remove_schedules(apps, schema_editor):
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Schedule.objects.filter(func='documents.tasks.train_classifier').delete()
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Schedule.objects.filter(func='documents.tasks.index_optimize').delete()
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Schedule.objects.filter(func='documents.tasks.consume_mail').delete()
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class Migration(migrations.Migration):
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@@ -6,14 +6,9 @@ from whoosh.writing import AsyncWriter
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from documents import index
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from documents.classifier import DocumentClassifier, \
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IncompatibleClassifierVersionError
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from documents.mail import MailFetcher
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from documents.models import Document
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def consume_mail():
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MailFetcher().pull()
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def index_optimize():
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index.open_index().optimize()
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File diff suppressed because it is too large
Load Diff
@@ -1,208 +0,0 @@
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Return-Path: <sender@example.com>
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X-Original-To: sender@mailbox4.mailhost.com
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Delivered-To: sender@mailbox4.mailhost.com
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Received: from mx8.mailhost.com (mail8.mailhost.com [75.126.24.68])
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by mailbox4.mailhost.com (Postfix) with ESMTP id B62BD5498001
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for <sender@mailbox4.mailhost.com>; Thu, 4 Feb 2016 22:01:17 +0000 (UTC)
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Received: from localhost (localhost.localdomain [127.0.0.1])
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by mx8.mailhost.com (Postfix) with ESMTP id B41796F190D
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for <sender@mailbox4.mailhost.com>; Thu, 4 Feb 2016 22:01:17 +0000 (UTC)
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X-Spam-Flag: NO
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X-Spam-Score: 0
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X-Spam-Level:
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X-Spam-Status: No, score=0 tagged_above=-999 required=3
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tests=[RCVD_IN_DNSWL_NONE=-0.0001]
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Received: from mx8.mailhost.com ([127.0.0.1])
|
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by localhost (mail8.mailhost.com [127.0.0.1]) (amavisd-new, port 10024)
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with ESMTP id 3cj6d28FXsS3 for <sender@mailbox4.mailhost.com>;
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Thu, 4 Feb 2016 22:01:17 +0000 (UTC)
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Received: from smtp.mailhost.com (smtp.mailhost.com [74.55.86.74])
|
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by mx8.mailhost.com (Postfix) with ESMTP id 527D76F1529
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for <paperless@example.com>; Thu, 4 Feb 2016 22:01:17 +0000 (UTC)
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Received: from [10.114.0.19] (nl3x.mullvad.net [46.166.136.162])
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by smtp.mailhost.com (Postfix) with ESMTP id 9C52420C6FDA
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for <paperless@example.com>; Thu, 4 Feb 2016 22:01:16 +0000 (UTC)
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To: paperless@example.com
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From: Daniel Quinn <sender@example.com>
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Subject: Test 0
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Message-ID: <56B3CA2A.6030806@example.com>
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Date: Thu, 4 Feb 2016 22:01:14 +0000
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User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101
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Thunderbird/38.5.0
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MIME-Version: 1.0
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Content-Type: multipart/mixed;
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boundary="------------090701020702030809070008"
|
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|
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This is a multi-part message in MIME format.
|
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--------------090701020702030809070008
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Content-Type: text/plain; charset=utf-8
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Content-Transfer-Encoding: 7bit
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The secret word is "paperless" :-)
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--------------090701020702030809070008
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Content-Type: application/pdf;
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name="test0.pdf"
|
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Content-Transfer-Encoding: base64
|
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Content-Disposition: attachment;
|
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filename="test0.pdf"
|
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|
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|
||||
--------------090701020702030809070008--
|
||||
@@ -1,90 +0,0 @@
|
||||
import base64
|
||||
import os
|
||||
from hashlib import md5
|
||||
from unittest import mock
|
||||
|
||||
import magic
|
||||
from django.conf import settings
|
||||
from django.test import TestCase
|
||||
|
||||
from ..mail import Message, Attachment
|
||||
|
||||
|
||||
class TestMessage(TestCase):
|
||||
|
||||
def __init__(self, *args, **kwargs):
|
||||
|
||||
TestCase.__init__(self, *args, **kwargs)
|
||||
self.sample = os.path.join(
|
||||
settings.BASE_DIR,
|
||||
"documents",
|
||||
"tests",
|
||||
"samples",
|
||||
"mail.txt"
|
||||
)
|
||||
|
||||
def test_init(self):
|
||||
|
||||
with open(self.sample, "rb") as f:
|
||||
|
||||
with mock.patch("logging.StreamHandler.emit") as __:
|
||||
message = Message(f.read())
|
||||
|
||||
self.assertTrue(message)
|
||||
self.assertEqual(message.subject, "Test 0")
|
||||
|
||||
data = message.attachment.read()
|
||||
|
||||
self.assertEqual(
|
||||
md5(data).hexdigest(), "7c89655f9e9eb7dd8cde8568e8115d59")
|
||||
|
||||
self.assertEqual(
|
||||
message.attachment.content_type, "application/pdf")
|
||||
with magic.Magic(flags=magic.MAGIC_MIME_TYPE) as m:
|
||||
self.assertEqual(m.id_buffer(data), "application/pdf")
|
||||
|
||||
|
||||
class TestInlineMessage(TestCase):
|
||||
|
||||
def __init__(self, *args, **kwargs):
|
||||
|
||||
TestCase.__init__(self, *args, **kwargs)
|
||||
self.sample = os.path.join(
|
||||
settings.BASE_DIR,
|
||||
"documents",
|
||||
"tests",
|
||||
"samples",
|
||||
"inline_mail.txt"
|
||||
)
|
||||
|
||||
def test_init(self):
|
||||
|
||||
with open(self.sample, "rb") as f:
|
||||
|
||||
with mock.patch("logging.StreamHandler.emit") as __:
|
||||
message = Message(f.read())
|
||||
|
||||
self.assertTrue(message)
|
||||
self.assertEqual(message.subject, "Paperless Inline Image")
|
||||
|
||||
data = message.attachment.read()
|
||||
|
||||
self.assertEqual(
|
||||
md5(data).hexdigest(), "30c00a7b42913e65f7fdb0be40b9eef3")
|
||||
|
||||
self.assertEqual(
|
||||
message.attachment.content_type, "image/png")
|
||||
with magic.Magic(flags=magic.MAGIC_MIME_TYPE) as m:
|
||||
self.assertEqual(m.id_buffer(data), "image/png")
|
||||
|
||||
|
||||
class TestAttachment(TestCase):
|
||||
|
||||
def test_init(self):
|
||||
data = base64.encodebytes(b"0")
|
||||
self.assertEqual(Attachment(data, "application/pdf").suffix, "pdf")
|
||||
self.assertEqual(Attachment(data, "image/png").suffix, "png")
|
||||
self.assertEqual(Attachment(data, "image/jpeg").suffix, "jpeg")
|
||||
self.assertEqual(Attachment(data, "image/gif").suffix, "gif")
|
||||
self.assertEqual(Attachment(data, "image/tiff").suffix, "tiff")
|
||||
self.assertEqual(Attachment(data, "image/png").read(), data)
|
||||
Reference in New Issue
Block a user