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77 lines
2.0 KiB
Markdown
77 lines
2.0 KiB
Markdown
Title: Générer un QRcode dans Django
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Date: 2019-07-20 23:13
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Modified: 2021-11-28 02:00
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Summary: Un générateur de code barre 2D dans une vue Django
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Category: Bloc-notes
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Tags: django, qrcode, web, dev, python
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Status: Published
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🚧 _need to be refreshed_ 🚧
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```python
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from base64 import b64encode
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import io
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import qrcode
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from django.urls import reverse
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from django.views.generic import DetailView
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from foobar.models import Foobar
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class FoobarDetail(DetailView):
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""" Detail view of a Foobar """
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model = Foobar
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pk_url_kwarg = "foobar_id"
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def get_context_data(self, **kwargs):
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""" Add a Base64 encoded image (QRcode) containing URL to foobar page """
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new_qrcode = qrcode.QRCode(
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version=1,
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error_correction=qrcode.constants.ERROR_CORRECT_H,
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box_size=6,
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border=0,
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)
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url_host = self.request.get_host()
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url_protocol = "http://"
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if self.request.is_secure():
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url_protocol = "https://"
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new_qrcode.add_data(
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"{protocol}{host}{path}".format(
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protocol=url_protocol,
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host=url_host,
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path=reverse(
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"foobar:form",
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kwargs={"foobar_id": self.kwargs["foobar_id"]},
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),
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)
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)
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new_qrcode.make(fit=True)
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qr_image = new_qrcode.make_image()
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qr_byte_image = io.BytesIO()
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qr_image.save(qr_byte_image, format="PNG")
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qr_byte_image = qr_byte_image.getvalue()
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qr_b64_image = "data:image/png;base64,{}".format(
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b64encode(qr_byte_image).decode()
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)
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context = super().get_context_data(**kwargs)
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context["qrcode"] = qr_b64_image
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return context
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```
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---
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Refs:
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- Internal `candidate/views.py`
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- [`lincolnloop/python-qrcode`](https://github.com/lincolnloop/python-qrcode)
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- [_Generate QR Code In Django Model_](https://gilang.chandrasa.com/blog/generate-qr-code-in-django-model/) by [_Gilang Chandrasa_](https://gilang.chandrasa.com/) (16 Nov 2015)
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