I am trying to get Etags working in Django - so that if a page has not
been updated (and the client has already seen the page) it is returned
by the client's browser rather than rendered by django.
The code below is proof of concept. However, it only partially
works, and that's why I'm asking for help.
When the client first connects the code correctly renders the page and
returns an ETAG header.
On the next request, the browser correctly sends the "If None Mach"
request header with the ETAG details. The code correctly returns the
304 respose and the client displays the page from the browser's
caache.
So far so good.
However, on the third request, it seems that the browser does not send
a "If-None_match" request header, so the etag is not found and the
whole page re-renders from the server.
Is there something else I need to configure? Or something I am doing
wrong?
Cheers
MerMer
def etag_test(request):
etag = "TestEtag12345"
if etag == request.META.get("HTTP_IF_NONE_MATCH"): # Check to see
if request has matching etag
return http.HttpResponseNotModified() # if etag matches send
a 304 reponse, so browser uses client cache
html="<html><body>This is a test of ETAG</body></html>"
#Finally, add in the ETag to the new response we're returning.
response = http.HttpResponse(html)
response["Etag"] = etag # add Etag header to respone
return response
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