WIP:QRcode on django note

content/qrcode-generation-django.md

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+Title: Générer un QRcode dans Django
+Date: 2019-07-20 23:13
+Summary: Un générateur de code barre 2D dans une vue Django
+Category: Bloc-notes
+Tags: django, qrcode, web, dev, tdd, python
+Status: Draft
+Lang: fr
+
+---
+
+```python
+from base64 import b64encode
+import io
+import qrcode
+
+from django.urls import reverse
+from django.views.generic import DetailView
+
+from foobar.models import Foobar
+
+
+class FoobarDetail(DetailView):
+    """ Detail view of a Foobar """
+
+    model = Foobar
+    pk_url_kwarg = "foobar_id"
+
+    def get_context_data(self, **kwargs):
+        """ Add a Base64 encoded image (QRcode) containing URL to foobar page """
+
+        new_qrcode = qrcode.QRCode(
+            version=1,
+            error_correction=qrcode.constants.ERROR_CORRECT_H,
+            box_size=6,
+            border=0,
+        )
+
+        url_host = self.request.get_host()
+        url_protocol = "http://"
+
+        if self.request.is_secure():
+            url_protocol = "https://"
+
+        new_qrcode.add_data(
+            "{protocol}{host}{path}".format(
+                protocol=url_protocol,
+                host=url_host,
+                path=reverse(
+                    "foobar:form",
+                    kwargs={"foobar_id": self.kwargs["foobar_id"]},
+                ),
+            )
+        )
+        new_qrcode.make(fit=True)
+        qr_image = new_qrcode.make_image()
+
+        qr_byte_image = io.BytesIO()
+        qr_image.save(qr_byte_image, format="PNG")
+        qr_byte_image = qr_byte_image.getvalue()
+        qr_b64_image = "data:image/png;base64,{}".format(
+            b64encode(qr_byte_image).decode()
+        )
+
+        context = super().get_context_data(**kwargs)
+        context["qrcode"] = qr_b64_image
+
+        return context
+```
+
+http://git.mf2i.fr/fred/confluent/tree/master/candidate/views.py
+https://github.com/lincolnloop/python-qrcode
+https://gilang.chandrasa.com/blog/generate-qr-code-in-django-model/