From: Ben Darnell <ben@bendarnell.com>
Date: Wed, 6 Jul 2011 06:53:38 +0000 (-0700)
Subject: Don't keep the entire output in a cStringIO when gzipping chunks
X-Git-Tag: v2.1.0~105
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=30c1f269c10222d6d1952f225e34322cd1f9f143;p=thirdparty%2Ftornado.git

Don't keep the entire output in a cStringIO when gzipping chunks
---

diff --git a/tornado/web.py b/tornado/web.py
index 497d7e9f5..b656178ea 100644
--- a/tornado/web.py
+++ b/tornado/web.py
@@ -1562,7 +1562,6 @@ class GZipContentEncoding(OutputTransform):
             headers["Content-Encoding"] = "gzip"
             self._gzip_value = BytesIO()
             self._gzip_file = gzip.GzipFile(mode="w", fileobj=self._gzip_value)
-            self._gzip_pos = 0
             chunk = self.transform_chunk(chunk, finishing)
             if "Content-Length" in headers:
                 headers["Content-Length"] = str(len(chunk))
@@ -1576,9 +1575,8 @@ class GZipContentEncoding(OutputTransform):
             else:
                 self._gzip_file.flush()
             chunk = self._gzip_value.getvalue()
-            if self._gzip_pos > 0:
-                chunk = chunk[self._gzip_pos:]
-            self._gzip_pos += len(chunk)
+            self._gzip_value.truncate(0)
+            self._gzip_value.seek(0)
         return chunk