diff --git a/django/contrib/staticfiles/storage.py b/django/contrib/staticfiles/storage.py
index 8353889..39b7c72 100644
a
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b
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class CachedFilesMixin(object):
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118 | 118 | of the storage. |
119 | 119 | """ |
120 | 120 | matched, url = matchobj.groups() |
121 | | # Completely ignore http(s) prefixed URLs |
122 | | if url.startswith(('http', 'https')): |
| 121 | # Completely ignore http(s) and data: prefixed URLs |
| 122 | if url.startswith(('http', 'https', 'data:')): |
123 | 123 | return matched |
124 | 124 | name_parts = name.split('/') |
125 | 125 | # Using posix normpath here to remove duplicates |