Robert Brewer avatar Robert Brewer committed 493815f

Fix for #599 (Trouble with GZip and Etag (with enabled autotags)). Response.body was being set to [''], which doesn't evaluate to False.

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             # strings get wrapped in a list because iterating over a single
             # item list is much faster than iterating over every character
             # in a long string.
-            value = [value]
+            if value:
+                value = [value]
+            else:
+                # [''] doesn't evaluate to False, so replace it with [].
+                value = []
         elif isinstance(value, types.FileType):
             value = file_generator(value)
         elif value is None:
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