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Add UTF-8 Validation to Django FileFields, CharFields and TextFields

Project description

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This package was created because at my work, Language and Translation Technology Team at the University of Ghent, we often create demos on the web that allow the user to input and process text or files. These texts are then processed by other scripts that expect clean UTF-8-texts. This library extends the Django FileField, CharField and TextField by checking if the content of a submitted file or text is clean. If not, it generates an error. Checks are executed for four byte long characters and NULL characters.

Requirements

Django >= 1.8

Installation

pip install django-utf8field

Usage

Add the app to your settings:

INSTALLED_APPS = (
    ...
    'utf8field',
    ...

FileField

Create a model like you would do normally, but instead of using FileField you use UTF8FileField:

from django.db import models
from utf8field.fields import UTF8FileField

class YourModel(models.Model):
    title = models.CharField(max_length=255)
    created_on = models.DateTimeField(auto_add_on=True)
    text = models.UTF8FileField()

You also have the option to provide the option max_content_length to limit the number of characters in the file. If the content is longer an error will be displayed. If you want to enable four_byte_detection set the parameter to True.

text = models.UTF8FileField(max_content_length=1000, four_byte_detection=True)

CharField

Create a model like you would do normally, but instead of using CharField you use UTF8CharField. If you want to enable four_byte_detection set the parameter to True.

from django.db import models
from utf8field.fields import UTF8CharField

class YourModel(models.Model):
    title = models.CharField(max_length=255, four_byte_detection=True)
    created_on = models.DateTimeField(auto_add_on=True)
    text = models.UTF8CharField(max_length=1000)

TextField

Create a model like you would do normally, but instead of using TextField you use UTF8TextField. If you want to enable four_byte_detection set the parameter to True.

from django.db import models
from utf8field.fields import UTF8TextField

class YourModel(models.Model):
    title = models.CharField(max_length=255)
    created_on = models.DateTimeField(auto_add_on=True)
    text = models.UTF8TextField(four_byte_detection=True)

Django Rest Framework

The necessary serializers and automatic mapping of fields is provided so you should not be doing anything yourself to get the texts or files validated when using a ModelSerializer.

Development

To run the tests make sure Django, Django Rest Framework and coverage are installed (pip install django djangorestframework coverage) and execute

python manage.py test

To create extra translations, execute

pm makemessages --locale=nl --extension=py --ignore=dev_example --ignore=build

… and modify the resulting django.po file in utf8field/locale/nl/LC_MESSAGES.

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