733 lines
26 KiB
Python
733 lines
26 KiB
Python
from __future__ import unicode_literals
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from email import message_from_string
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from email.Utils import collapse_rfc2231_value
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from email.header import decode_header
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import imaplib
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import json
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import logging
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import os
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import poplib
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import subprocess
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import sh
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import yaml
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try:
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scanimage = sh.Command('/usr/bin/scanimage')
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except sh.CommandNotFound:
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scanimage = None
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from django.core.exceptions import ValidationError
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from django.core.files import File
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from django.core.files.base import ContentFile
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from django.db import models, transaction
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from django.utils.encoding import python_2_unicode_compatible
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from django.utils.timezone import now
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from django.utils.translation import ugettext_lazy as _
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from model_utils.managers import InheritanceManager
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from common.compressed_files import CompressedFile, NotACompressedFile
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from common.utils import TemporaryFile
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from converter.literals import DIMENSION_SEPARATOR
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from converter.models import Transformation
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from djcelery.models import PeriodicTask, IntervalSchedule
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from documents.models import Document, DocumentType
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from documents.settings import setting_language
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from metadata.api import save_metadata_list, set_bulk_metadata
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from metadata.models import MetadataType
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from tags.models import Tag
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from .classes import Attachment, PseudoFile, SourceUploadedFile, StagingFile
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from .exceptions import SourceException
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from .literals import (
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DEFAULT_INTERVAL, DEFAULT_POP3_TIMEOUT, DEFAULT_IMAP_MAILBOX,
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DEFAULT_METADATA_ATTACHMENT_NAME, SCANNER_ADF_MODE_CHOICES,
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SCANNER_ADF_MODE_SIMPLEX, SCANNER_MODE_COLOR, SCANNER_MODE_CHOICES,
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SCANNER_SOURCE_CHOICES, SCANNER_SOURCE_FLATBED,
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SOURCE_CHOICES, SOURCE_CHOICE_STAGING, SOURCE_CHOICE_WATCH,
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SOURCE_CHOICE_WEB_FORM, SOURCE_INTERACTIVE_UNCOMPRESS_CHOICES,
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SOURCE_UNCOMPRESS_CHOICES, SOURCE_UNCOMPRESS_CHOICE_N,
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SOURCE_UNCOMPRESS_CHOICE_Y, SOURCE_CHOICE_EMAIL_IMAP,
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SOURCE_CHOICE_EMAIL_POP3, SOURCE_CHOICE_SANE_SCANNER,
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)
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from .settings import setting_scanimage_path
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logger = logging.getLogger(__name__)
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@python_2_unicode_compatible
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class Source(models.Model):
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label = models.CharField(max_length=64, verbose_name=_('Label'))
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enabled = models.BooleanField(default=True, verbose_name=_('Enabled'))
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objects = InheritanceManager()
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@classmethod
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def class_fullname(cls):
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return unicode(dict(SOURCE_CHOICES).get(cls.source_type))
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def __str__(self):
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return '%s' % self.label
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def fullname(self):
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return ' '.join([self.class_fullname(), '"%s"' % self.label])
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def upload_document(self, file_object, document_type, description=None, label=None, language=None, metadata_dict_list=None, metadata_dictionary=None, tag_ids=None, user=None):
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try:
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with transaction.atomic():
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document = Document.objects.create(
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description=description or '', document_type=document_type,
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label=label or file_object.name,
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language=language or setting_language.value
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)
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document.save(_user=user)
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document_version = document.new_version(
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file_object=file_object, _user=user
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)
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if user:
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document.add_as_recent_document_for_user(user)
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Transformation.objects.copy(
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source=self, targets=document_version.pages.all()
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)
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if metadata_dict_list:
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save_metadata_list(
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metadata_dict_list, document, create=True
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)
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if metadata_dictionary:
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set_bulk_metadata(
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document=document,
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metadata_dictionary=metadata_dictionary
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)
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if tag_ids:
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for tag in Tag.objects.filter(pk__in=tag_ids):
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tag.documents.add(document)
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except Exception as exception:
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logger.critical(
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'Unexpected exception while trying to create new document '
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'"%s" from source "%s"; %s',
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label or file_object.name, self, exception
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)
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raise
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def handle_upload(self, file_object, description=None, document_type=None, expand=False, label=None, language=None, metadata_dict_list=None, metadata_dictionary=None, user=None):
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if not document_type:
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document_type = self.document_type
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kwargs = {
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'description': description, 'document_type': document_type,
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'label': label, 'language': language,
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'metadata_dict_list': metadata_dict_list,
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'metadata_dictionary': metadata_dictionary, 'user': user
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}
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if expand:
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try:
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compressed_file = CompressedFile(file_object)
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for compressed_file_child in compressed_file.children():
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kwargs.update({'label': unicode(compressed_file_child)})
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self.upload_document(
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file_object=File(compressed_file_child), **kwargs
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)
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compressed_file_child.close()
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except NotACompressedFile:
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logging.debug('Exception: NotACompressedFile')
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self.upload_document(file_object=file_object, **kwargs)
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else:
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self.upload_document(file_object=file_object, **kwargs)
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def get_upload_file_object(self, form_data):
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pass
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# TODO: Should raise NotImplementedError()?
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def clean_up_upload_file(self, upload_file_object):
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pass
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# TODO: Should raise NotImplementedError()?
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class Meta:
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ordering = ('label',)
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verbose_name = _('Source')
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verbose_name_plural = _('Sources')
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class InteractiveSource(Source):
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objects = InheritanceManager()
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class Meta:
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verbose_name = _('Interactive source')
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verbose_name_plural = _('Interactive sources')
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class SaneScanner(InteractiveSource):
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can_compress = False
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is_interactive = True
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source_type = SOURCE_CHOICE_SANE_SCANNER
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device_name = models.CharField(
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max_length=255,
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help_text=_('Device name as returned by the SANE backend.'),
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verbose_name=_('Device name')
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)
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mode = models.CharField(
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blank=True, choices=SCANNER_MODE_CHOICES, default=SCANNER_MODE_COLOR,
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help_text=_(
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'Selects the scan mode (e.g., lineart, monochrome, or color). '
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'If this option is not supported by your scanner, leave it blank.'
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), max_length=16, verbose_name=_('Mode')
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)
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resolution = models.PositiveIntegerField(
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blank=True, help_text=_(
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'Sets the resolution of the scanned image in DPI (dots per inch). '
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'Typical value is 200. If this option is not supported by your '
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'scanner, leave it blank.'
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), verbose_name=_('Resolution')
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)
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source = models.CharField(
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blank=True, choices=SCANNER_SOURCE_CHOICES,
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default=SCANNER_SOURCE_FLATBED, help_text=_(
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'Selects the scan source (such as a document-feeder). If this '
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'option is not supported by your scanner, leave it blank.'
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), max_length=32,
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verbose_name=_('Paper source')
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)
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adf_mode = models.CharField(
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blank=True, choices=SCANNER_ADF_MODE_CHOICES,
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default=SCANNER_ADF_MODE_SIMPLEX, help_text=_(
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'Selects the document feeder mode (simplex/duplex). If this '
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'option is not supported by your scanner, leave it blank.'
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), max_length=16, verbose_name=_('ADF mode')
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)
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class Meta:
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verbose_name = _('SANE Scanner')
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verbose_name_plural = _('SANE Scanners')
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def clean_up_upload_file(self, upload_file_object):
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pass
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def get_upload_file_object(self, form_data):
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temporary_file_object = TemporaryFile()
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command_line = [
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setting_scanimage_path.value, '-d', self.device_name,
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'--format', 'tiff',
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]
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if self.resolution:
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command_line.extend(
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['--resolution', '{}'.format(self.resolution)]
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)
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if self.mode:
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command_line.extend(
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['--mode', self.mode]
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)
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if self.source:
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command_line.extend(
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['--source', self.source]
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)
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if self.adf_mode:
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command_line.extend(
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['--adf-mode', self.adf_mode]
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)
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filestderr = TemporaryFile()
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try:
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logger.debug('Scan command line: %s', command_line)
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subprocess.check_call(
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command_line, stdout=temporary_file_object, stderr=filestderr
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)
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except subprocess.CalledProcessError:
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filestderr.seek(0)
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error_message = filestderr.read()
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logger.error(
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'Exception while scanning from source:%s ; %s', self,
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error_message
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)
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message = _('Error while scanning; %s') % error_message
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self.logs.create(message=message)
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raise SourceException(message)
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else:
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return SourceUploadedFile(
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source=self, file=PseudoFile(
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file=temporary_file_object, name='scan {}'.format(now())
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)
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)
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class StagingFolderSource(InteractiveSource):
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can_compress = True
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is_interactive = True
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source_type = SOURCE_CHOICE_STAGING
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folder_path = models.CharField(
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max_length=255, help_text=_('Server side filesystem path.'),
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verbose_name=_('Folder path')
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)
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preview_width = models.IntegerField(
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help_text=_('Width value to be passed to the converter backend.'),
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verbose_name=_('Preview width')
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)
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preview_height = models.IntegerField(
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blank=True, null=True,
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help_text=_('Height value to be passed to the converter backend.'),
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verbose_name=_('Preview height')
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)
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uncompress = models.CharField(
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choices=SOURCE_INTERACTIVE_UNCOMPRESS_CHOICES, max_length=1,
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help_text=_('Whether to expand or not compressed archives.'),
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verbose_name=_('Uncompress')
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)
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delete_after_upload = models.BooleanField(
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default=True,
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help_text=_(
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'Delete the file after is has been successfully uploaded.'
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),
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verbose_name=_('Delete after upload')
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)
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def get_preview_size(self):
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dimensions = []
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dimensions.append(unicode(self.preview_width))
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if self.preview_height:
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dimensions.append(unicode(self.preview_height))
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return DIMENSION_SEPARATOR.join(dimensions)
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def get_file(self, *args, **kwargs):
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return StagingFile(staging_folder=self, *args, **kwargs)
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def get_files(self):
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try:
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for entry in sorted([os.path.normcase(f) for f in os.listdir(self.folder_path) if os.path.isfile(os.path.join(self.folder_path, f))]):
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yield self.get_file(filename=entry)
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except OSError as exception:
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logger.error(
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'Unable get list of staging files from source: %s; %s', self,
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exception
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|
)
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raise Exception(
|
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_('Unable get list of staging files: %s') % exception
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)
|
|
|
|
def get_upload_file_object(self, form_data):
|
|
staging_file = self.get_file(
|
|
encoded_filename=form_data['staging_file_id']
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)
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|
return SourceUploadedFile(
|
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source=self, file=staging_file.as_file(), extra_data=staging_file
|
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)
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|
|
|
def clean_up_upload_file(self, upload_file_object):
|
|
if self.delete_after_upload:
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|
try:
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|
upload_file_object.extra_data.delete()
|
|
except Exception as exception:
|
|
logger.error(
|
|
'Error deleting staging file: %s; %s', upload_file_object,
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|
exception
|
|
)
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|
raise Exception(
|
|
_('Error deleting staging file; %s') % exception
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)
|
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|
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class Meta:
|
|
verbose_name = _('Staging folder')
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|
verbose_name_plural = _('Staging folders')
|
|
|
|
|
|
class WebFormSource(InteractiveSource):
|
|
can_compress = True
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|
is_interactive = True
|
|
source_type = SOURCE_CHOICE_WEB_FORM
|
|
|
|
# TODO: unify uncompress as an InteractiveSource field
|
|
uncompress = models.CharField(
|
|
choices=SOURCE_INTERACTIVE_UNCOMPRESS_CHOICES,
|
|
help_text=_('Whether to expand or not compressed archives.'),
|
|
max_length=1, verbose_name=_('Uncompress')
|
|
)
|
|
# Default path
|
|
|
|
def get_upload_file_object(self, form_data):
|
|
return SourceUploadedFile(source=self, file=form_data['file'])
|
|
|
|
class Meta:
|
|
verbose_name = _('Web form')
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|
verbose_name_plural = _('Web forms')
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|
|
|
|
|
class OutOfProcessSource(Source):
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|
is_interactive = False
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|
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|
class Meta:
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|
verbose_name = _('Out of process')
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|
verbose_name_plural = _('Out of process')
|
|
|
|
|
|
class IntervalBaseModel(OutOfProcessSource):
|
|
interval = models.PositiveIntegerField(
|
|
default=DEFAULT_INTERVAL,
|
|
help_text=_('Interval in seconds between checks for new documents.'),
|
|
verbose_name=_('Interval')
|
|
)
|
|
document_type = models.ForeignKey(
|
|
DocumentType,
|
|
help_text=_(
|
|
'Assign a document type to documents uploaded from this source.'
|
|
),
|
|
verbose_name=_('Document type')
|
|
)
|
|
uncompress = models.CharField(
|
|
choices=SOURCE_UNCOMPRESS_CHOICES,
|
|
help_text=_('Whether to expand or not, compressed archives.'),
|
|
max_length=1, verbose_name=_('Uncompress')
|
|
)
|
|
|
|
def _get_periodic_task_name(self, pk=None):
|
|
return 'check_interval_source-%i' % (pk or self.pk)
|
|
|
|
def _delete_periodic_task(self, pk=None):
|
|
try:
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|
periodic_task = PeriodicTask.objects.get(
|
|
name=self._get_periodic_task_name(pk)
|
|
)
|
|
|
|
interval_instance = periodic_task.interval
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|
|
|
if tuple(interval_instance.periodictask_set.values_list('id', flat=True)) == (periodic_task.pk,):
|
|
# Only delete the interval if nobody else is using it
|
|
interval_instance.delete()
|
|
else:
|
|
periodic_task.delete()
|
|
except PeriodicTask.DoesNotExist:
|
|
logger.warning(
|
|
'Tried to delete non existant periodic task "%s"',
|
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self._get_periodic_task_name(pk)
|
|
)
|
|
|
|
def save(self, *args, **kwargs):
|
|
new_source = not self.pk
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|
super(IntervalBaseModel, self).save(*args, **kwargs)
|
|
|
|
if not new_source:
|
|
self._delete_periodic_task()
|
|
|
|
interval_instance, created = IntervalSchedule.objects.get_or_create(
|
|
every=self.interval, period='seconds'
|
|
)
|
|
# Create a new interval or reuse someone else's
|
|
PeriodicTask.objects.create(
|
|
name=self._get_periodic_task_name(),
|
|
interval=interval_instance,
|
|
task='sources.tasks.task_check_interval_source',
|
|
kwargs=json.dumps({'source_id': self.pk})
|
|
)
|
|
|
|
def delete(self, *args, **kwargs):
|
|
pk = self.pk
|
|
super(IntervalBaseModel, self).delete(*args, **kwargs)
|
|
self._delete_periodic_task(pk)
|
|
|
|
class Meta:
|
|
verbose_name = _('Interval source')
|
|
verbose_name_plural = _('Interval sources')
|
|
|
|
|
|
class EmailBaseModel(IntervalBaseModel):
|
|
host = models.CharField(max_length=128, verbose_name=_('Host'))
|
|
ssl = models.BooleanField(default=True, verbose_name=_('SSL'))
|
|
port = models.PositiveIntegerField(blank=True, null=True, help_text=_(
|
|
'Typical choices are 110 for POP3, 995 for POP3 over SSL, 143 for '
|
|
'IMAP, 993 for IMAP over SSL.'), verbose_name=_('Port')
|
|
)
|
|
username = models.CharField(max_length=96, verbose_name=_('Username'))
|
|
password = models.CharField(max_length=96, verbose_name=_('Password'))
|
|
metadata_attachment_name = models.CharField(
|
|
default=DEFAULT_METADATA_ATTACHMENT_NAME,
|
|
help_text=_(
|
|
'Name of the attachment that will contains the metadata type '
|
|
'names and value pairs to be assigned to the rest of the '
|
|
'downloaded attachments. Note: This attachment has to be the '
|
|
'first attachment.'
|
|
), max_length=128, verbose_name=_('Metadata attachment name')
|
|
)
|
|
subject_metadata_type = models.ForeignKey(
|
|
MetadataType, blank=True, help_text=_(
|
|
'Select a metadata type valid for the document type selected in '
|
|
'which to store the email\'s subject.'
|
|
), null=True, related_name='email_subject',
|
|
verbose_name=_('Subject metadata type')
|
|
)
|
|
from_metadata_type = models.ForeignKey(
|
|
MetadataType, blank=True, help_text=_(
|
|
'Select a metadata type valid for the document type selected in '
|
|
'which to store the email\'s "from" value.'
|
|
), null=True, related_name='email_from',
|
|
verbose_name=_('From metadata type')
|
|
)
|
|
store_body = models.BooleanField(
|
|
default=True, help_text=_(
|
|
'Store the body of the email as a text document.'
|
|
), verbose_name=_('Store email body')
|
|
)
|
|
|
|
def clean(self):
|
|
if self.subject_metadata_type:
|
|
if self.subject_metadata_type.pk not in self.document_type.metadata.values_list('metadata_type', flat=True):
|
|
raise ValidationError(
|
|
{
|
|
'subject_metadata_type': _(
|
|
'Subject metadata type "%(metadata_type)s" is not '
|
|
'valid for the document type: %(document_type)s'
|
|
) % {
|
|
'metadata_type': self.subject_metadata_type,
|
|
'document_type': self.document_type
|
|
}
|
|
}
|
|
)
|
|
|
|
if self.from_metadata_type:
|
|
if self.from_metadata_type.pk not in self.document_type.metadata.values_list('metadata_type', flat=True):
|
|
raise ValidationError(
|
|
{
|
|
'from_metadata_type': _(
|
|
'"From" metadata type "%(metadata_type)s" is not '
|
|
'valid for the document type: %(document_type)s'
|
|
) % {
|
|
'metadata_type': self.from_metadata_type,
|
|
'document_type': self.document_type
|
|
}
|
|
}
|
|
)
|
|
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# From: http://bookmarks.honewatson.com/2009/08/11/
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# python-gmail-imaplib-search-subject-get-attachments/
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# TODO: Add lock to avoid running more than once concurrent same document
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# download
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# TODO: Use message ID for lock
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@staticmethod
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def getheader(header_text, default='ascii'):
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headers = decode_header(header_text)
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header_sections = [
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unicode(text, charset or default) for text, charset in headers
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]
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return ''.join(header_sections)
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@staticmethod
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def process_message(source, message):
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counter = 1
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email = message_from_string(message)
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metadata_dictionary = {}
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if source.subject_metadata_type:
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metadata_dictionary[
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source.subject_metadata_type.name
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] = EmailBaseModel.getheader(email['Subject'])
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if source.from_metadata_type:
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metadata_dictionary[
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source.from_metadata_type.name
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] = EmailBaseModel.getheader(email['From'])
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for part in email.walk():
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disposition = part.get('Content-Disposition', 'none')
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logger.debug('Disposition: %s', disposition)
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if disposition.startswith('attachment'):
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raw_filename = part.get_filename()
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if raw_filename:
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filename = collapse_rfc2231_value(raw_filename)
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else:
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filename = _('attachment-%i') % counter
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counter += 1
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logger.debug('filename: %s', filename)
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with Attachment(part, name=filename) as file_object:
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if filename == source.metadata_attachment_name:
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metadata_dictionary = yaml.safe_load(
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file_object.read()
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)
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logger.debug(
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'Got metadata dictionary: %s', metadata_dictionary
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)
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else:
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source.handle_upload(
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document_type=source.document_type,
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file_object=file_object, label=filename,
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expand=(
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source.uncompress == SOURCE_UNCOMPRESS_CHOICE_Y
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), metadata_dictionary=metadata_dictionary
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)
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else:
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logger.debug('No Content-Disposition')
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content_type = part.get_content_type()
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logger.debug('content_type: %s', content_type)
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if content_type == 'text/plain' and source.store_body:
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content = part.get_payload(decode=True).decode(part.get_content_charset())
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with ContentFile(content=content, name='email_body.txt') as file_object:
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source.handle_upload(
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document_type=source.document_type,
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file_object=file_object,
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expand=SOURCE_UNCOMPRESS_CHOICE_N, label='email_body.txt',
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metadata_dictionary=metadata_dictionary
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)
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class Meta:
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verbose_name = _('Email source')
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verbose_name_plural = _('Email sources')
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class POP3Email(EmailBaseModel):
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source_type = SOURCE_CHOICE_EMAIL_POP3
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timeout = models.PositiveIntegerField(
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default=DEFAULT_POP3_TIMEOUT, verbose_name=_('Timeout')
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)
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def check_source(self):
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logger.debug('Starting POP3 email fetch')
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logger.debug('host: %s', self.host)
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logger.debug('ssl: %s', self.ssl)
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if self.ssl:
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mailbox = poplib.POP3_SSL(self.host, self.port)
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else:
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mailbox = poplib.POP3(self.host, self.port, timeout=self.timeout)
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mailbox.getwelcome()
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mailbox.user(self.username)
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mailbox.pass_(self.password)
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messages_info = mailbox.list()
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logger.debug('messages_info:')
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logger.debug(messages_info)
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logger.debug('messages count: %s', len(messages_info[1]))
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for message_info in messages_info[1]:
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message_number, message_size = message_info.split()
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logger.debug('message_number: %s', message_number)
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logger.debug('message_size: %s', message_size)
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complete_message = '\n'.join(mailbox.retr(message_number)[1])
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EmailBaseModel.process_message(
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source=self, message=complete_message
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)
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mailbox.dele(message_number)
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mailbox.quit()
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class Meta:
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verbose_name = _('POP email')
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verbose_name_plural = _('POP email')
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class IMAPEmail(EmailBaseModel):
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source_type = SOURCE_CHOICE_EMAIL_IMAP
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mailbox = models.CharField(
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default=DEFAULT_IMAP_MAILBOX,
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help_text=_('IMAP Mailbox from which to check for messages.'),
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max_length=64, verbose_name=_('Mailbox')
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)
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# http://www.doughellmann.com/PyMOTW/imaplib/
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def check_source(self):
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logger.debug('Starting IMAP email fetch')
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logger.debug('host: %s', self.host)
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logger.debug('ssl: %s', self.ssl)
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if self.ssl:
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mailbox = imaplib.IMAP4_SSL(self.host, self.port)
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else:
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mailbox = imaplib.IMAP4(self.host, self.port)
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mailbox.login(self.username, self.password)
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mailbox.select(self.mailbox)
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status, data = mailbox.search(None, 'NOT', 'DELETED')
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if data:
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messages_info = data[0].split()
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logger.debug('messages count: %s', len(messages_info))
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for message_number in messages_info:
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logger.debug('message_number: %s', message_number)
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status, data = mailbox.fetch(message_number, '(RFC822)')
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EmailBaseModel.process_message(
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source=self, message=data[0][1]
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)
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mailbox.store(message_number, '+FLAGS', '\\Deleted')
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mailbox.expunge()
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mailbox.close()
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mailbox.logout()
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class Meta:
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verbose_name = _('IMAP email')
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verbose_name_plural = _('IMAP email')
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class WatchFolderSource(IntervalBaseModel):
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source_type = SOURCE_CHOICE_WATCH
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folder_path = models.CharField(
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help_text=_('Server side filesystem path.'), max_length=255,
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verbose_name=_('Folder path')
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)
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def check_source(self):
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# Force self.folder_path to unicode to avoid os.listdir returning
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# str for non-latin filenames, gh-issue #163
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for file_name in os.listdir(unicode(self.folder_path)):
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full_path = os.path.join(self.folder_path, file_name)
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if os.path.isfile(full_path):
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with File(file=open(full_path, mode='rb')) as file_object:
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self.handle_upload(
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file_object=file_object,
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expand=(self.uncompress == SOURCE_UNCOMPRESS_CHOICE_Y),
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label=file_name
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)
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os.unlink(full_path)
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class Meta:
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verbose_name = _('Watch folder')
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verbose_name_plural = _('Watch folders')
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class SourceLog(models.Model):
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source = models.ForeignKey(
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Source, related_name='logs', verbose_name=_('Source')
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)
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datetime = models.DateTimeField(
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auto_now_add=True, editable=False, verbose_name=_('Date time')
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)
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message = models.TextField(
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blank=True, editable=False, verbose_name=_('Message')
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)
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class Meta:
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get_latest_by = 'datetime'
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ordering = ('-datetime',)
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verbose_name = _('Log entry')
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verbose_name_plural = _('Log entries')
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