Add downloads in SVG or EPS format

Author: raatmarien

qr_app/templates/qr_app/your-qr-page.html

@@ -63,6 +63,14 @@ <h1>Where does my QR code go?</h1>
             <p>Your QR code leads to <a href="{{ qr_url }}">{{ qr_url }}</a>. If you
             scan the QR code you should be redirected to there.</p>
 
+            <h1>Can I also have it in vector formats?</h1>
+
+            <p>Of course! You can get your QR code <a href="{{ qr_image_svg }}">in SVG format
+            here</a> or <a href="{{ qr_image_eps }}">in EPS format here</a>. You might need to right
+            click these images and select "Save link as" to save them to your computer. If you need
+            any other format, you can probably use any online converter from the SVG format to
+            whatever you want!</p>
+
             <h1>Can I make another one?</h1>
 
             <p>Of course, just <a href="/editor">click here to get back to the editor</a></p>

qr_app/urls.py

@@ -20,7 +20,15 @@
 urlpatterns = [
     path('', views.index, name='index'),
     path('copyright/', views.copyright, name='copyright'),
-    path('your-qr-image/<str:qr_secret>', views.get_qr_from_secret, name='get_qr_from_secret'),
+    path('your-qr-image/<str:qr_secret>',
+         views.get_qr_from_secret,
+         name='get_qr_from_secret'),
+    path('your-qr-image-svg/<str:qr_secret>',
+         views.get_qr_from_secret_svg,
+         name='get_qr_from_secret_svg'),
+    path('your-qr-image-eps/<str:qr_secret>',
+         views.get_qr_from_secret_eps,
+         name='get_qr_from_secret_eps'),
     path('your-qr/<str:qr_secret>', views.get_your_qr_page, name='get_your_qr_page'),
     path('create_qr_arr/', views.create_qr_from_array, name='create_qr_from_array'),
 ]

qr_app/views.py

@@ -39,8 +39,8 @@ def index(request):
 def copyright(request):
     return render(request, 'qr_app/copyright.html', {});
 
-def get_temp_name():
-    return '/tmp/' + next(tempfile._get_candidate_names()) + '.png'
+def get_temp_name(extension='.png'):
+    return '/tmp/' + next(tempfile._get_candidate_names()) + extension
 
 
 def save_file(f):
@@ -120,6 +120,8 @@ def get_your_qr_page(request, qr_secret):
     if ri is not None:
         return render(request, 'qr_app/your-qr-page.html', context={
             'qr_image': reverse('get_qr_from_secret', args=[qr_secret]),
+            'qr_image_svg': reverse('get_qr_from_secret_svg', args=[qr_secret]),
+            'qr_image_eps': reverse('get_qr_from_secret_eps', args=[qr_secret]),
             'qr_url': ri.to_url,
         })
     else:
@@ -149,3 +151,37 @@ def get_qr_from_secret(request, qr_secret):
             return HttpResponse(f.read(), content_type="image/png")
     else:
         return HttpResponseNotFound('<h1>QR code not found</h1>')
+
+
+def get_qr_from_secret_svg(request, qr_secret):
+    ri = get_ri_from_secret(qr_secret)
+    if ri is not None:
+        qr_data_utf8 = ri.qr_data_utf8
+        qr = pyqrcode.create(
+            qr_data_utf8, mode='alphanumeric',
+            error=ri.errorCorrectionLevel, encoding='UTF-8')
+        
+        qrfile = get_temp_name('.svg')
+        qr.svg(qrfile, scale=5)
+
+        with open(qrfile, "rb") as f:
+            return HttpResponse(f.read(), content_type="image/svg+xml")
+    else:
+        return HttpResponseNotFound('<h1>QR code not found</h1>')
+
+
+def get_qr_from_secret_eps(request, qr_secret):
+    ri = get_ri_from_secret(qr_secret)
+    if ri is not None:
+        qr_data_utf8 = ri.qr_data_utf8
+        qr = pyqrcode.create(
+            qr_data_utf8, mode='alphanumeric',
+            error=ri.errorCorrectionLevel, encoding='UTF-8')
+        
+        qrfile = get_temp_name('.eps')
+        qr.eps(qrfile, scale=5)
+
+        with open(qrfile, "rb") as f:
+            return HttpResponse(f.read(), content_type="image/eps")
+    else:
+        return HttpResponseNotFound('<h1>QR code not found</h1>')