Django WeasyPrint CBV
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A Django
_ class-based view generating PDF responses using WeasyPrint
_.
Install and update using pip
_:
.. code-block:: text
pip install -U django-weasyprint
WeasyPrint
_ is automatically installed as a dependency of this package.
If you run into any problems be sure to check their install instructions <https://weasyprint.readthedocs.io/en/latest/install.html>
_ for help!
.. tip::
In version 53 WeasyPrint switched to pydyf
_ as PDF generator instead of Cairo.
With that change PNG output was dropped and you might encounter other
changes in the generated PDF.
You can continue using WeasyPrint/Cairo by installing django-weasyprint 1.x!
Use WeasyTemplateView
as class based view base class or the
mixin WeasyTemplateResponseMixin
on a TemplateView
(or subclass
thereof).
.. code:: python
# views.py
import functools
from django.conf import settings
from django.views.generic import DetailView
from django_weasyprint import WeasyTemplateResponseMixin
from django_weasyprint.views import WeasyTemplateResponse
from django_weasyprint.utils import django_url_fetcher
class MyDetailView(DetailView):
# vanilla Django DetailView
template_name = 'mymodel.html'
def custom_url_fetcher(url, *args, **kwargs):
# rewrite requests for CDN URLs to file path in STATIC_ROOT to use local file
cloud_storage_url = 'https://s3.amazonaws.com/django-weasyprint/static/'
if url.startswith(cloud_storage_url):
url = 'file://' + url.replace(cloud_storage_url, settings.STATIC_URL)
return django_url_fetcher(url, *args, **kwargs)
class CustomWeasyTemplateResponse(WeasyTemplateResponse):
# customized response class to pass a kwarg to URL fetcher
def get_url_fetcher(self):
# disable host and certificate check
context = ssl.create_default_context()
context.check_hostname = False
context.verify_mode = ssl.CERT_NONE
return functools.partial(custom_url_fetcher, ssl_context=context)
class PrintView(WeasyTemplateResponseMixin, MyDetailView):
# output of MyDetailView rendered as PDF with hardcoded CSS
pdf_stylesheets = [
settings.STATIC_ROOT + 'css/app.css',
]
# show pdf in-line (default: True, show download dialog)
pdf_attachment = False
# custom response class to configure url-fetcher
response_class = CustomWeasyTemplateResponse
class DownloadView(WeasyTemplateResponseMixin, MyDetailView):
# suggested filename (is required for attachment/download!)
pdf_filename = 'foo.pdf'
class DynamicNameView(WeasyTemplateResponseMixin, MyDetailView):
# dynamically generate filename
def get_pdf_filename(self):
return 'foo-{at}.pdf'.format(
at=timezone.now().strftime('%Y%m%d-%H%M'),
)
.. code:: html
<!-- mymodel.html -->
<!doctype html>
<html>
<head>
<!-- Use "static" template tag and configure STATIC_URL as usual. -->
<link rel="stylesheet" href="{% static 'css/app.css' %}" />
</head>
<body>
Hello PDF-world!
</body>
</html>
By default WeasyTemplateResponse
determines the base_url
for
weasyprint.HTML
_ and weasyprint.CSS
_ automatically using Django's
request.build_absolute_uri()
.
To disable that set WEASYPRINT_BASEURL
to a fixed value, e.g.:
.. code:: python
# Disable prefixing relative URLs with request.build_absolute_uri().
# Instead, handle them as absolute file paths.
WEASYPRINT_BASEURL = '/'
See CHANGELOG.md
_
.. _pip: https://pip.pypa.io/en/stable/quickstart .. _Django: https://www.djangoproject.com .. _WeasyPrint: http://weasyprint.org .. _pydyf: https://doc.courtbouillon.org/pydyf/stable/
.. _weasyprint.HTML: https://doc.courtbouillon.org/weasyprint/stable/api_reference.html?highlight=base_url#weasyprint.HTML .. _weasyprint.CSS: https://doc.courtbouillon.org/weasyprint/stable/api_reference.html?#weasyprint.CSS
.. _CHANGELOG.md: https://github.com/fdemmer/django-weasyprint/blob/main/CHANGELOG.md