django gzip middleware with streaming support

gistfile1.diff

Index: gzip.py
===================================================================
--- gzip.py     (revision 17761)
+++ gzip.py     (working copy)
@@ -1,4 +1,5 @@
 import re
+from zlib import compressobj
 
 from django.utils.text import compress_string
 from django.utils.cache import patch_vary_headers
@@ -32,15 +33,12 @@
         if not re_accepts_gzip.search(ae):
             return response
 
-        # Return the compressed content only if it's actually shorter.
-        compressed_content = compress_string(response.content)
-        if len(compressed_content) >= len(response.content):
-            return response
+        compressor = compressobj()
+        content = iter(response.content):
+        response.content = ( compressor.compress(data) for data in content )
 
         if response.has_header('ETag'):
             response['ETag'] = re.sub('"$', ';gzip"', response['ETag'])
+        response['Content-Encoding'] = 'gzip'
 
-        response.content = compressed_content
-        response['Content-Encoding'] = 'gzip'
-        response['Content-Length'] = str(len(response.content))
         return response