Coverage for /var/srv/projects/api.amasfac.comuna18.com/tmp/venv/lib/python3.9/site-packages/django/middleware/http.py: 29%

1from django.utils.cache import cc_delim_re, get_conditional_response, set_response_etag 

2from django.utils.deprecation import MiddlewareMixin 

3from django.utils.http import parse_http_date_safe 

4 

5 

6class ConditionalGetMiddleware(MiddlewareMixin): 

7 """ 

8 Handle conditional GET operations. If the response has an ETag or 

9 Last-Modified header and the request has If-None-Match or If-Modified-Since, 

10 replace the response with HttpNotModified. Add an ETag header if needed. 

11 """ 

12 

13 def process_response(self, request, response): 

14 # It's too late to prevent an unsafe request with a 412 response, and 

15 # for a HEAD request, the response body is always empty so computing 

16 # an accurate ETag isn't possible. 

17 if request.method != "GET": 

18 return response 

19 

20 if self.needs_etag(response) and not response.has_header("ETag"): 

21 set_response_etag(response) 

22 

23 etag = response.get("ETag") 

24 last_modified = response.get("Last-Modified") 

25 last_modified = last_modified and parse_http_date_safe(last_modified) 

26 

27 if etag or last_modified: 

28 return get_conditional_response( 

29 request, 

30 etag=etag, 

31 last_modified=last_modified, 

32 response=response, 

33 ) 

34 

35 return response 

36 

37 def needs_etag(self, response): 

38 """Return True if an ETag header should be added to response.""" 

39 cache_control_headers = cc_delim_re.split(response.get("Cache-Control", "")) 

40 return all(header.lower() != "no-store" for header in cache_control_headers)