417 lines
17 KiB
Python
417 lines
17 KiB
Python
from __future__ import absolute_import
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from ast import literal_eval
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import json
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import logging
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import os
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from django.contrib.contenttypes import generic
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from django.contrib.contenttypes.models import ContentType
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from django.core.exceptions import ValidationError
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from django.db import models, transaction
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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 converter.api import get_available_transformations_choices
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from converter.literals import DIMENSION_SEPARATOR
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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 metadata.api import save_metadata_list
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from .classes import Attachment, StagingFile
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from .literals import (DEFAULT_INTERVAL, DEFAULT_POP3_TIMEOUT,
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DEFAULT_IMAP_MAILBOX, SOURCE_CHOICES,
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SOURCE_CHOICES_PLURAL, SOURCE_CHOICE_STAGING,
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SOURCE_CHOICE_WATCH, SOURCE_CHOICE_WEB_FORM,
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SOURCE_INTERACTIVE_UNCOMPRESS_CHOICES,
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SOURCE_UNCOMPRESS_CHOICES, SOURCE_CHOICE_EMAIL_IMAP,
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SOURCE_CHOICE_EMAIL_POP3)
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from .managers import SourceTransformationManager
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logger = logging.getLogger(__name__)
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class Source(models.Model):
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title = models.CharField(max_length=64, verbose_name=_(u'Title'))
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enabled = models.BooleanField(default=True, verbose_name=_(u'Enabled'))
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whitelist = models.TextField(blank=True, verbose_name=_(u'Whitelist'), editable=False)
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blacklist = models.TextField(blank=True, verbose_name=_(u'Blacklist'), editable=False)
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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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@classmethod
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def class_fullname_plural(cls):
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return unicode(dict(SOURCE_CHOICES_PLURAL).get(cls.source_type))
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def __unicode__(self):
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return u'%s' % self.title
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def fullname(self):
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return u' '.join([self.class_fullname(), '"%s"' % self.title])
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def internal_name(self):
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return u'%s_%d' % (self.source_type, self.pk)
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def get_transformation_list(self):
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return SourceTransformation.transformations.get_for_object_as_list(self)
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def upload_file(self, file_object, filename=None, use_file_name=False, document_type=None, expand=False, metadata_dict_list=None, user=None, document=None, new_version_data=None, command_line=False, description=None):
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is_compressed = None
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if expand:
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try:
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cf = CompressedFile(file_object)
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count = 1
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for fp in cf.children():
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if command_line:
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print 'Uploading file #%d: %s' % (count, fp)
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self.upload_single_file(file_object=fp, filename=None, document_type=document_type, metadata_dict_list=metadata_dict_list, user=user, description=description)
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fp.close()
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count += 1
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except NotACompressedFile:
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is_compressed = False
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logging.debug('Exception: NotACompressedFile')
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if command_line:
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raise
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self.upload_single_file(file_object=file_object, filename=filename, document_type=document_type, metadata_dict_list=metadata_dict_list, user=user, description=description)
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else:
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is_compressed = True
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else:
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self.upload_single_file(file_object, filename, use_file_name, document_type, metadata_dict_list, user, document, new_version_data, description=description)
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file_object.close()
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return {'is_compressed': is_compressed}
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@transaction.atomic
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def upload_single_file(self, file_object, filename=None, use_file_name=False, document_type=None, metadata_dict_list=None, user=None, document=None, new_version_data=None, description=None):
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new_document = not document
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if new_document:
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document = Document()
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if document_type:
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document.document_type = document_type
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if description:
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document.description = description
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document.save(user=user)
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else:
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if use_file_name:
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filename = None
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else:
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filename = filename if filename else document.latest_version.filename
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if description:
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document.description = description
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document.save()
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if not new_version_data:
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new_version_data = {}
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new_version = document.new_version(file=file_object, user=user, **new_version_data)
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if filename:
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document.rename(filename)
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transformations, errors = self.get_transformation_list()
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new_version.apply_default_transformations(transformations)
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# TODO: new HISTORY for version updates
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if metadata_dict_list and new_document:
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# Only do for new documents
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save_metadata_list(metadata_dict_list, document, create=True)
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class Meta:
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ordering = ('title',)
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verbose_name = _(u'Source')
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verbose_name_plural = _(u'Sources')
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class InteractiveSource(Source):
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class Meta:
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verbose_name = _(u'Interactive source')
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verbose_name_plural = _(u'Interactive sources')
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class StagingFolderSource(InteractiveSource):
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is_interactive = True
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source_type = SOURCE_CHOICE_STAGING
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folder_path = models.CharField(max_length=255, verbose_name=_(u'Folder path'), help_text=_(u'Server side filesystem path.'))
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preview_width = models.IntegerField(verbose_name=_(u'Preview width'), help_text=_(u'Width value to be passed to the converter backend.'))
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preview_height = models.IntegerField(blank=True, null=True, verbose_name=_(u'Preview height'), help_text=_(u'Height value to be passed to the converter backend.'))
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uncompress = models.CharField(max_length=1, choices=SOURCE_INTERACTIVE_UNCOMPRESS_CHOICES, verbose_name=_(u'Uncompress'), help_text=_(u'Whether to expand or not compressed archives.'))
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delete_after_upload = models.BooleanField(default=True, verbose_name=_(u'Delete after upload'), help_text=_(u'Delete the file after is has been successfully uploaded.'))
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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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raise Exception(_(u'Unable get list of staging files: %s') % exception)
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class Meta:
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verbose_name = _(u'Staging folder')
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verbose_name_plural = _(u'Staging folders')
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class WebFormSource(InteractiveSource):
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is_interactive = True
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source_type = SOURCE_CHOICE_WEB_FORM
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uncompress = models.CharField(max_length=1, choices=SOURCE_INTERACTIVE_UNCOMPRESS_CHOICES, verbose_name=_(u'Uncompress'), help_text=_(u'Whether to expand or not compressed archives.'))
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# Default path
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class Meta:
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verbose_name = _(u'Web form')
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verbose_name_plural = _(u'Web forms')
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class OutOfProcessSource(Source):
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is_interactive = False
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class Meta:
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verbose_name = _(u'Out of process')
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verbose_name_plural = _(u'Out of process')
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class IntervalBaseModel(OutOfProcessSource):
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interval = models.PositiveIntegerField(default=DEFAULT_INTERVAL, verbose_name=_('Interval'), help_text=_('Interval in seconds between document downloads from this source.'))
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document_type = models.ForeignKey(DocumentType, null=True, blank=True, verbose_name=_('Document type'), help_text=_('Assign a document type to documents uploaded from this source.'))
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uncompress = models.CharField(max_length=1, choices=SOURCE_UNCOMPRESS_CHOICES, verbose_name=_('Uncompress'), help_text=_('Whether to expand or not, compressed archives.'))
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def save(self, *args, **kwargs):
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new_source = not self.pk
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super(IntervalBaseModel, self).save(*args, **kwargs)
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periodic_task_name = 'check_interval_source-%i' % self.pk
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if new_source:
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interval_instance = IntervalSchedule.objects.create(every=self.interval)
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PeriodicTask.objects.create(
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name=periodic_task_name,
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interval=interval_instance,
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task='sources.tasks.task_check_interval_source',
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queue='mailing',
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args=json.dump({'source_id': self.pk})
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)
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else:
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periodic_task = PeriodicTask.objects.get(name=periodic_task_name)
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periodic_task.interval.every = self.interval
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periodic_task.interval.save()
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periodic_task.save()
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def delete(self, *args, **kwargs):
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super(IntervalBaseModel, self).delete(*args, **kwargs)
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periodic_task_name = 'check_interval_source-%i' % self.pk
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periodic_task = PeriodicTask.objects.get(name=periodic_task_name)
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interval_instance = periodic_task.interval
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periodic_task.delete()
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interval_instance.delete()
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class Meta:
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verbose_name = _('Interval source')
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verbose_name_plural = _('Interval sources')
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class EmailBaseModel(IntervalBaseModel):
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host = models.CharField(max_length=128, verbose_name=_('Host'))
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ssl = models.BooleanField(verbose_name=_('SSL'))
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port = models.PositiveIntegerField(blank=True, null=True, verbose_name=_('Port'), help_text=_('Typical choices are 110 for POP3, 995 for POP3 over SSL, 143 for IMAP, 993 for IMAP over SSL.'))
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username = models.CharField(max_length=96, verbose_name=_('Username'))
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password = models.CharField(max_length=96, verbose_name=_('Password'))
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# From: http://bookmarks.honewatson.com/2009/08/11/python-gmail-imaplib-search-subject-get-attachments/
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@staticmethod
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def process_message(source, message):
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email = message_from_string(message)
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counter = 1
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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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document_file = Attachment(part, name=filename)
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source.upload_file(document_file, expand=(source.uncompress == SOURCE_UNCOMPRESS_CHOICE_Y), document_type=source.document_type)
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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(default=DEFAULT_POP3_TIMEOUT, verbose_name=_('Timeout'))
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def fetch_mail(self):
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try:
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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=POP3_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(source=self, message=complete_message)
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mailbox.dele(message_number)
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mailbox.quit()
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#SourceLog.objects.save_status(source=self, status='Successful connection.')
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except Exception as exception:
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logger.error('Unhandled exception: %s' % exception)
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#SourceLog.objects.save_status(source=self, status='Error: %s' % exc)
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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(max_length=64, default=DEFAULT_IMAP_MAILBOX, verbose_name=_('Mailbox'), help_text=_('Mail from which to check for messages with attached documents.'))
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# http://www.doughellmann.com/PyMOTW/imaplib/
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def fetch_mail(self):
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try:
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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(source=self, message=data[0][1])
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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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#SourceLog.objects.save_status(source=self, status='Successful connection.')
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except Exception as exception:
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logger.error('Unhandled exception: %s' % exc)
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#SourceLog.objects.save_status(source=self, status='Error: %s' % exc)
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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(OutOfProcessSource):
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source_type = SOURCE_CHOICE_WATCH
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folder_path = models.CharField(max_length=255, verbose_name=_(u'Folder path'), help_text=_(u'Server side filesystem path.'))
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uncompress = models.CharField(max_length=1, choices=SOURCE_UNCOMPRESS_CHOICES, verbose_name=_(u'Uncompress'), help_text=_(u'Whether to expand or not compressed archives.'))
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delete_after_upload = models.BooleanField(default=True, verbose_name=_(u'Delete after upload'), help_text=_(u'Delete the file after is has been successfully uploaded.'))
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interval = models.PositiveIntegerField(verbose_name=_(u'Interval'), help_text=_(u'Inverval in seconds where the watch folder path is checked for new documents.'))
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class Meta:
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verbose_name = _(u'Watch folder')
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verbose_name_plural = _(u'Watch folders')
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class ArgumentsValidator(object):
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message = _(u'Enter a valid value.')
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code = 'invalid'
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def __init__(self, message=None, code=None):
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if message is not None:
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self.message = message
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if code is not None:
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self.code = code
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def __call__(self, value):
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"""
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Validates that the input evaluates correctly.
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"""
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value = value.strip()
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try:
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literal_eval(value)
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except (ValueError, SyntaxError):
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raise ValidationError(self.message, code=self.code)
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class SourceTransformation(models.Model):
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"""
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Model that stores the transformation and transformation arguments
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for a given document source
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"""
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content_type = models.ForeignKey(ContentType)
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object_id = models.PositiveIntegerField()
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content_object = generic.GenericForeignKey('content_type', 'object_id')
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order = models.PositiveIntegerField(default=0, blank=True, null=True, verbose_name=_(u'Order'), db_index=True)
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transformation = models.CharField(choices=get_available_transformations_choices(), max_length=128, verbose_name=_(u'Transformation'))
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arguments = models.TextField(blank=True, null=True, verbose_name=_(u'Arguments'), help_text=_(u'Use dictionaries to indentify arguments, example: %s') % u'{\'degrees\':90}', validators=[ArgumentsValidator()])
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objects = models.Manager()
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transformations = SourceTransformationManager()
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def __unicode__(self):
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return self.get_transformation_display()
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class Meta:
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ordering = ('order',)
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verbose_name = _(u'Document source transformation')
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verbose_name_plural = _(u'Document source transformations')
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