Added GPG encryption for the PDFs

src/documents/views.py

@@ -1,3 +1,29 @@
-from django.shortcuts import render
+import gnupg
 
-# Create your views here.
+from django.conf import settings
+from django.http import HttpResponse
+from django.template.defaultfilters import slugify
+from django.views.generic.detail import DetailView
+
+from .models import Document
+
+
+class PdfView(DetailView):
+
+    model = Document
+
+    def render_to_response(self, context, **response_kwargs):
+        """
+        Override the default to return the unencrypted PDF as raw data.
+        """
+
+        gpg = gnupg.GPG(gnupghome=settings.GNUPG_HOME)
+
+        response = HttpResponse(gpg.decrypt_file(
+            self.object.pdf,
+            passphrase=settings.PASSPHRASE,
+        ).data, content_type="application/pdf")
+        response["Content-Disposition"] = 'attachment; filename="{}"'.format(
+            slugify(str(self.object)) + ".pdf")
+
+        return response