On Thu, 2002-03-14 at 09:57, Clark C . Evans wrote:
> I know this is an older question, but what do I have to do
> to send back gzippped content? Here is what I figure:
>
> 1. A function needs to be written "supportsCompression"
> which examines the headers sent to determine if the
> user agent accepts compressed content.
>
> 2. If the user agent supportsCompression, then before
> the response is sent, it should be compressed and the
> mime type should be updated respectively.
The encoding shows whether the content is compressed -- the mime type
isn't touched.
I posted some code before that was tested and worked -- it's simple, but
streaming and configuration weren't included. Here it is again:
import gzip # standard module
from cStringIO import StringIO
class HTTPResponse(Response):
#...
def gzipContents(self):
if self.hasHeader('Content-encoding'):
return # I don't believe we can double-encode...?
if not self.contentTypeCompressable(self.header('Content-type')):
return
self.setHeader('Content-encoding', 'gzip')
compressed = StringIO()
gzipfile = gzip.GzipFile('', 'wb', 9, compressed) # We are writing to an
empty-named, binary file, compression level 9
gzipfile.write(string.join(self._contents, ''))
gzipfile.close()
self._contents = [compressed.getvalue())
compressed.close()
def contentTypeCompressable(self, type):
return type[:5] == 'text/'
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