76 lines
2.7 KiB
Python
76 lines
2.7 KiB
Python
from __future__ import unicode_literals
|
|
|
|
import logging
|
|
|
|
try:
|
|
from cStringIO import StringIO
|
|
except ImportError:
|
|
from StringIO import StringIO
|
|
|
|
from django import apps
|
|
from django.utils.translation import ugettext_lazy as _
|
|
|
|
from acls.api import class_permissions
|
|
from common import menu_facet, menu_sidebar
|
|
from django_gpg.exceptions import GPGDecryptionError
|
|
from django_gpg.runtime import gpg
|
|
from documents.models import Document, DocumentVersion
|
|
|
|
from .links import (
|
|
link_document_signature_delete, link_document_signature_download,
|
|
link_document_signature_upload, link_document_verify
|
|
)
|
|
from .models import DocumentVersionSignature
|
|
from .permissions import (
|
|
PERMISSION_DOCUMENT_VERIFY, PERMISSION_SIGNATURE_DELETE,
|
|
PERMISSION_SIGNATURE_DOWNLOAD, PERMISSION_SIGNATURE_UPLOAD
|
|
)
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
def document_pre_open_hook(descriptor, instance):
|
|
if DocumentVersionSignature.objects.has_embedded_signature(document_version=instance):
|
|
# If it has an embedded signature, decrypt
|
|
try:
|
|
result = gpg.decrypt_file(descriptor, close_descriptor=False)
|
|
# gpg return a string, turn it into a file like object
|
|
except GPGDecryptionError:
|
|
# At least return the original raw content
|
|
descriptor.seek(0)
|
|
return descriptor
|
|
else:
|
|
descriptor.close()
|
|
return StringIO(result.data)
|
|
else:
|
|
return descriptor
|
|
|
|
|
|
def document_version_post_save_hook(instance):
|
|
logger.debug('instance: %s', instance)
|
|
|
|
try:
|
|
document_signature = DocumentVersionSignature.objects.get(document_version=instance)
|
|
except DocumentVersionSignature.DoesNotExist:
|
|
document_signature = DocumentVersionSignature.objects.create(document_version=instance)
|
|
document_signature.check_for_embedded_signature()
|
|
|
|
|
|
class DocumentSignaturesApp(apps.AppConfig):
|
|
name = 'document_signatures'
|
|
verbose_name = _('Document signatures')
|
|
|
|
def ready(self):
|
|
DocumentVersion.register_post_save_hook(1, document_version_post_save_hook)
|
|
DocumentVersion.register_pre_open_hook(1, document_pre_open_hook)
|
|
|
|
class_permissions(Document, [
|
|
PERMISSION_DOCUMENT_VERIFY,
|
|
PERMISSION_SIGNATURE_DELETE,
|
|
PERMISSION_SIGNATURE_DOWNLOAD,
|
|
PERMISSION_SIGNATURE_UPLOAD,
|
|
])
|
|
|
|
menu_facet.bind_links(links=[link_document_verify], sources=[Document])
|
|
menu_sidebar.bind_links(links=[link_document_signature_upload, link_document_signature_download, link_document_signature_delete], sources=['signatures:document_verify', 'signatures:document_signature_upload', 'signatures:document_signature_download', 'signatures:document_signature_delete'])
|