work with upper case file extentions

panel/pane/image.py

@@ -52,9 +52,13 @@ def applies(cls, obj):
 
     @classmethod
     def _is_url(cls, obj):
-        return (isinstance(obj, string_types) and
-                (obj.startswith('http://') or obj.startswith('https://'))
-                and obj.endswith('.'+cls.imgtype))
+        if isinstance(obj, string_types):
+            lower_string = obj.lower()
+            return (
+                lower_string.startswith('http://')
+                or lower_string.startswith('https://')
+            ) and lower_string.endswith('.'+cls.imgtype)
+        return False
 
     def _img(self):
         if hasattr(self.object, '_repr_{}_'.format(self.imgtype)):

panel/tests/pane/test_image.py

@@ -1,5 +1,8 @@
 from __future__ import absolute_import, division, unicode_literals
 
+import sys
+import pytest
+
 from base64 import b64decode, b64encode
 
 from panel.pane import GIF, JPG, PNG, SVG
@@ -65,6 +68,7 @@ def test_load_from_byteio():
     image_data = image_pane._img()
     assert b'PNG' in image_data
 
+@pytest.mark.skipif(sys.version_info.major < 2, reason="Doesn't work with python 2")
 def test_load_from_stringio():
     """Testing a loading a image from a StringIO"""
     memory = StringIO()
@@ -74,3 +78,12 @@ def test_load_from_stringio():
     image_pane = PNG(memory)
     image_data = image_pane._img()
     assert 'PNG' in image_data
+
+def test_loading_a_image_from_url():
+    """Tests the loadiing of a image from a url"""
+    url = 'https://upload.wikimedia.org/wikipedia/commons/7/71/' \
+          '1700_CE_world_map.PNG'
+
+    image_pane = PNG(url)
+    image_data = image_pane._img()
+    assert b'PNG' in image_data