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A caching HttpResponse in order to reduce the roundtrip (a lot)

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Oliver Falk
2020-03-04 14:23:58 +01:00
parent 07ba1c5a05
commit 476bddb21c
2 changed files with 43 additions and 8 deletions
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5
config.py
View File

@@ -185,6 +185,11 @@ CACHES = {
'LOCATION': [
'127.0.0.1:11211',
],
},
'filesystem': {
'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache',
'LOCATION': '/var/tmp/ivatar_cache',
'TIMEOUT': 300,
}
}

46
ivatar/views.py
View File

@@ -10,7 +10,7 @@ from ssl import SSLError
from django.views.generic.base import TemplateView, View
from django.http import HttpResponse, HttpResponseRedirect, HttpResponseNotFound
from django.core.exceptions import ObjectDoesNotExist
from django.core.cache import cache
from django.core.cache import cache, caches
from django.utils.translation import ugettext_lazy as _
from django.urls import reverse_lazy
from django.db.models import Q
@@ -55,6 +55,17 @@ def get_size(request, size=DEFAULT_AVATAR_SIZE):
return size
class CachingHttpResponse(HttpResponse):
def __init__(self, uri, content=b'', content_type=None, status=200, reason=None, charset=None):
caches['filesystem'].set(uri, {
'content': content,
'content_type': content_type,
'status': status,
'reason': reason,
'charset': charset
})
return super().__init__(content, content_type, status, reason, charset)
class AvatarImageView(TemplateView):
'''
View to return (binary) image, based on OpenID/Email (both by digest)
@@ -78,6 +89,18 @@ class AvatarImageView(TemplateView):
forcedefault = False
gravatarredirect = False
gravatarproxy = True
uri = request.build_absolute_uri()
# Check the cache first
centry = caches['filesystem'].get(uri)
if centry:
# For DEBUG purpose only print('Cached entry for %s' % uri)
return HttpResponse(
centry['content'],
content_type=centry['content_type'],
status=centry['status'],
reason = centry['reason'],
charset = centry['charset'])
# In case no digest at all is provided, return to home page
if not 'digest' in kwargs:
@@ -156,7 +179,8 @@ class AvatarImageView(TemplateView):
data = BytesIO()
monsterdata.save(data, 'PNG', quality=JPEG_QUALITY)
data.seek(0)
response = HttpResponse(
response = CachingHttpResponse(
uri,
data,
content_type='image/png')
response['Cache-Control'] = 'max-age=%i' % CACHE_IMAGES_MAX_AGE
@@ -171,7 +195,8 @@ class AvatarImageView(TemplateView):
data = BytesIO()
robohash.img.save(data, format='png')
data.seek(0)
response = HttpResponse(
response = CachingHttpResponse(
uri,
data,
content_type='image/png')
response['Cache-Control'] = 'max-age=%i' % CACHE_IMAGES_MAX_AGE
@@ -184,7 +209,8 @@ class AvatarImageView(TemplateView):
img = img.resize((size, size), Image.ANTIALIAS)
img.save(data, 'PNG', quality=JPEG_QUALITY)
data.seek(0)
response = HttpResponse(
response = CachingHttpResponse(
uri,
data,
content_type='image/png')
response['Cache-Control'] = 'max-age=%i' % CACHE_IMAGES_MAX_AGE
@@ -196,7 +222,8 @@ class AvatarImageView(TemplateView):
img = paganobj.img.resize((size, size), Image.ANTIALIAS)
img.save(data, 'PNG', quality=JPEG_QUALITY)
data.seek(0)
response = HttpResponse(
response = CachingHttpResponse(
uri,
data,
content_type='image/png')
response['Cache-Control'] = 'max-age=%i' % CACHE_IMAGES_MAX_AGE
@@ -210,7 +237,8 @@ class AvatarImageView(TemplateView):
data = BytesIO()
img.save(data, 'PNG', quality=JPEG_QUALITY)
data.seek(0)
response = HttpResponse(
response = CachingHttpResponse(
uri,
data,
content_type='image/png')
response['Cache-Control'] = 'max-age=%i' % CACHE_IMAGES_MAX_AGE
@@ -250,7 +278,8 @@ class AvatarImageView(TemplateView):
obj.save()
if imgformat == 'jpg':
imgformat = 'jpeg'
response = HttpResponse(
response = CachingHttpResponse(
uri,
data,
content_type='image/%s' % imgformat)
response['Cache-Control'] = 'max-age=%i' % CACHE_IMAGES_MAX_AGE
@@ -334,7 +363,8 @@ class GravatarProxyView(View):
data = BytesIO(gravatarimagedata.read())
img = Image.open(data)
data.seek(0)
response = HttpResponse(
response = CachingHttpResponse(
uri,
data.read(),
content_type='image/%s' % file_format(img.format))
response['Cache-Control'] = 'max-age=%i' % CACHE_IMAGES_MAX_AGE