1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
import datetime
from decimal import Decimal, ROUND_HALF_DOWN
from django.contrib.syndication.views import Feed
from django.core.cache import cache
from django.db.models import Q
from django.utils.hashcompat import md5_constructor
from django.views.decorators.http import condition
from main.models import Arch, Repo, Package
from main.utils import CACHE_TIMEOUT, INVALIDATE_TIMEOUT
from main.utils import CACHE_PACKAGE_KEY, CACHE_NEWS_KEY
from news.models import News
def utc_offset():
'''Calculate the UTC offset from local time. Useful for converting values
stored in local time to things like cache last modifed headers.'''
timediff = datetime.datetime.utcnow() - datetime.datetime.now()
secs = timediff.days * 86400 + timediff.seconds
# round to nearest minute
mins = Decimal(secs) / Decimal(60)
mins = mins.quantize(Decimal('0'), rounding=ROUND_HALF_DOWN)
return datetime.timedelta(minutes=int(mins))
def retrieve_package_latest():
# we could break this down based on the request url, but it would probably
# cost us more in query time to do so.
latest = cache.get(CACHE_PACKAGE_KEY)
if latest:
return latest
try:
latest = Package.objects.values('last_update').latest(
'last_update')['last_update']
latest = latest + utc_offset()
# Using add means "don't overwrite anything in there". What could be in
# there is an explicit None value that our refresh signal set, which
# means we want to avoid race condition possibilities for a bit.
cache.add(CACHE_PACKAGE_KEY, latest, CACHE_TIMEOUT)
return latest
except Package.DoesNotExist:
pass
return None
def package_etag(request, *args, **kwargs):
latest = retrieve_package_latest()
if latest:
return md5_constructor(str(kwargs) + str(latest)).hexdigest()
return None
def package_last_modified(request, *args, **kwargs):
return retrieve_package_latest()
class PackageFeed(Feed):
link = '/packages/'
title_template = 'feeds/packages_title.html'
description_template = 'feeds/packages_description.html'
def __call__(self, request, *args, **kwargs):
wrapper = condition(etag_func=package_etag, last_modified_func=package_last_modified)
return wrapper(super(PackageFeed, self).__call__)(request, *args, **kwargs)
def get_object(self, request, arch='', repo=''):
obj = dict()
qs = Package.objects.select_related('arch', 'repo').order_by('-last_update')
if arch != '':
# feed for a single arch, also include 'any' packages everywhere
a = Arch.objects.get(name=arch)
qs = qs.filter(Q(arch=a) | Q(arch__agnostic=True))
obj['arch'] = a
if repo != '':
# feed for a single arch AND repo
r = Repo.objects.get(name=repo)
qs = qs.filter(repo=r)
obj['repo'] = r
obj['qs'] = qs[:50]
return obj
def title(self, obj):
s = 'Arch Linux: Recent package updates'
if 'repo' in obj:
s += ' (%s [%s])' % (obj['arch'].name, obj['repo'].name.lower())
elif 'arch' in obj:
s += ' (%s)' % (obj['arch'].name)
return s
def description(self, obj):
s = 'Recently updated packages in the Arch Linux package repositories'
if 'arch' in obj:
s += ' for the \'%s\' architecture' % obj['arch'].name.lower()
if not obj['arch'].agnostic:
s += ' (including \'any\' packages)'
if 'repo' in obj:
s += ' in the [%s] repository' % obj['repo'].name.lower()
s += '.'
return s
def items(self, obj):
return obj['qs']
def item_pubdate(self, item):
return item.last_update
def item_categories(self, item):
return (item.repo.name, item.arch.name)
def retrieve_news_latest():
latest = cache.get(CACHE_NEWS_KEY)
if latest:
return latest
try:
latest = News.objects.values('last_modified').latest(
'last_modified')['last_modified']
latest = latest + utc_offset()
# same thoughts apply as in retrieve_package_latest
cache.add(CACHE_NEWS_KEY, latest, CACHE_TIMEOUT)
return latest
except News.DoesNotExist:
pass
return None
def news_etag(request, *args, **kwargs):
latest = retrieve_news_latest()
if latest:
return md5_constructor(str(latest)).hexdigest()
return None
def news_last_modified(request, *args, **kwargs):
return retrieve_news_latest()
class NewsFeed(Feed):
title = 'Arch Linux: Recent news updates'
link = '/news/'
description = 'The latest and greatest news from the Arch Linux distribution.'
title_template = 'feeds/news_title.html'
description_template = 'feeds/news_description.html'
def __call__(self, request, *args, **kwargs):
wrapper = condition(etag_func=news_etag, last_modified_func=news_last_modified)
return wrapper(super(NewsFeed, self).__call__)(request, *args, **kwargs)
def items(self):
return News.objects.select_related('author').order_by('-postdate', '-id')[:10]
def item_pubdate(self, item):
d = item.postdate
return datetime.datetime(d.year, d.month, d.day)
def item_author_name(self, item):
return item.author.get_full_name()
# vim: set ts=4 sw=4 et:
|
