Add initial support for native product images

Definitely not perfect yet, but a start..

tailbone/templates/products/view.mako

@@ -110,7 +110,11 @@
         ${self.render_main_fields(form)}
       </div>
       % if image_url:
+          % if image_path is not Undefined:
               ${h.image(image_url, "Product Image", id='product-image', path=image_path, use_pil=False)}
+          % else:
+              ${h.image(image_url, "Product Image", id='product-image', width=150, height=150)}
+          % endif
       % endif
     </div>
   </div>

tailbone/views/products.py

@@ -2,7 +2,7 @@
 ################################################################################
 #
 #  Rattail -- Retail Software Framework
-#  Copyright © 2010-2016 Lance Edgar
+#  Copyright © 2010-2017 Lance Edgar
 #
 #  This file is part of Rattail.
 #
@@ -29,6 +29,7 @@ from __future__ import unicode_literals, absolute_import
 import os
 import re
 
+import six
 import sqlalchemy as sa
 from sqlalchemy import orm
 
@@ -345,6 +346,19 @@ class ProductsView(MasterView):
                                                 'instance_title': self.get_instance_title(instance),
                                                 'form': form})
 
+    def image(self):
+        """
+        View which renders the product's image as a response.
+        """
+        product = self.get_instance()
+        if not product.image:
+            raise httpexceptions.HTTPNotFound()
+        # TODO: how to properly detect image type?
+        # self.request.response.content_type = six.binary_type('image/png')
+        self.request.response.content_type = six.binary_type('image/jpeg')
+        self.request.response.body = product.image.bytes
+        return self.request.response
+
     def search(self):
         """
         Locate a product(s) by UPC.
@@ -562,6 +576,10 @@ class ProductsView(MasterView):
 
         cls._defaults(config)
 
+        # product image
+        config.add_route('products.image', '/products/{uuid}/image')
+        config.add_view(cls, attr='image', route_name='products.image')
+
 
 class ProductVersionView(VersionView):
     """