mirror of
https://gitlab2.federez.net/re2o/re2o
synced 2024-11-27 07:02:26 +00:00
72 lines
2.3 KiB
Python
72 lines
2.3 KiB
Python
# -*- mode: python; coding: utf-8 -*-
|
|
|
|
|
|
"""printer.validators
|
|
Custom validators useful for printer application.
|
|
Author : Maxime Bombar <bombar@crans.org>.
|
|
Date : 29/06/2018
|
|
"""
|
|
|
|
|
|
|
|
from django.utils.translation import ugettext_lazy as _
|
|
from django.core.exceptions import ValidationError
|
|
from django.template.defaultfilters import filesizeformat
|
|
from django.utils.deconstruct import deconstructible
|
|
|
|
import mimetypes
|
|
|
|
@deconstructible
|
|
class FileValidator(object):
|
|
"""
|
|
Custom validator for files. It checks the size and mimetype.
|
|
|
|
Parameters:
|
|
* ```allowed_types``` is an iterable of allowed mimetypes. Example: ['application/pdf'] for a pdf file.
|
|
* ```max_size``` is the maximum size allowed in bytes. Example: 25*1024*1024 for 25 MB.
|
|
|
|
Usage example:
|
|
|
|
class UploadModel(models.Model):
|
|
file = fileField(..., validators=FileValidator(allowed_types = ['application/pdf'], max_size=25*1024*1024))
|
|
"""
|
|
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
"""
|
|
Initialize the custom validator.
|
|
By default, all types and size are allowed.
|
|
"""
|
|
self.allowed_types = kwargs.pop('allowed_types', None)
|
|
self.max_size = kwargs.pop('max_size', None)
|
|
|
|
def __call__(self, value):
|
|
"""
|
|
Check the type and size.
|
|
"""
|
|
|
|
|
|
type_message = _("MIME type '%(type)s' is not valid. Please, use one of these types: %(allowed_types)s.")
|
|
type_code = 'invalidType'
|
|
|
|
oversized_message = _('The current file size is %(size)s. The maximum file size is %(max_size)s.')
|
|
oversized_code = 'oversized'
|
|
|
|
|
|
mimetype = mimetypes.guess_type(value.name)[0]
|
|
if self.allowed_types and not (mimetype in self.allowed_types):
|
|
type_params = {
|
|
'type': mimetype,
|
|
'allowed_types': ', '.join(self.allowed_types),
|
|
}
|
|
|
|
raise ValidationError(type_message, code=type_code, params=type_params)
|
|
|
|
filesize = len(value)
|
|
if self.max_size and filesize > self.max_size:
|
|
oversized_params = {
|
|
'size': '{}'.format(filesizeformat(filesize)),
|
|
'max_size': '{}'.format(filesizeformat(self.max_size)),
|
|
}
|
|
|
|
raise ValidationError(oversized_message, code=oversized_code, params=oversized_params)
|