You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
39 lines
1.5 KiB
39 lines
1.5 KiB
import re |
|
|
|
from django.utils.text import compress_string |
|
from django.utils.cache import patch_vary_headers |
|
|
|
re_accepts_gzip = re.compile(r'\bgzip\b') |
|
|
|
class GZipMiddleware(object): |
|
""" |
|
This middleware compresses content if the browser allows gzip compression. |
|
It sets the Vary header accordingly, so that caches will base their storage |
|
on the Accept-Encoding header. |
|
""" |
|
def process_response(self, request, response): |
|
# It's not worth compressing non-OK or really short responses. |
|
if response.status_code != 200 or len(response.content) < 200: |
|
return response |
|
|
|
patch_vary_headers(response, ('Accept-Encoding',)) |
|
|
|
# Avoid gzipping if we've already got a content-encoding. |
|
if response.has_header('Content-Encoding'): |
|
return response |
|
|
|
# Older versions of IE have issues with gzipped pages containing either |
|
# Javascript and PDF. |
|
if "msie" in request.META.get('HTTP_USER_AGENT', '').lower(): |
|
ctype = response.get('Content-Type', '').lower() |
|
if "javascript" in ctype or ctype == "application/pdf": |
|
return response |
|
|
|
ae = request.META.get('HTTP_ACCEPT_ENCODING', '') |
|
if not re_accepts_gzip.search(ae): |
|
return response |
|
|
|
response.content = compress_string(response.content) |
|
response['Content-Encoding'] = 'gzip' |
|
response['Content-Length'] = str(len(response.content)) |
|
return response
|
|
|