2 # This file is part of my.gpodder.org.
4 # my.gpodder.org is free software: you can redistribute it and/or modify it
5 # under the terms of the GNU Affero General Public License as published by
6 # the Free Software Foundation, either version 3 of the License, or (at your
7 # option) any later version.
9 # my.gpodder.org is distributed in the hope that it will be useful, but
10 # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public
12 # License for more details.
14 # You should have received a copy of the GNU Affero General Public License
15 # along with my.gpodder.org. If not, see <http://www.gnu.org/licenses/>.
20 from datetime
import datetime
24 from PIL
import Image
, ImageDraw
26 from django
.conf
import settings
27 from django
.http
import Http404
, HttpResponse
28 from django
.views
.generic
.base
import View
29 from django
.utils
.decorators
import method_decorator
30 from django
.views
.decorators
.http
import last_modified
33 LOGO_DIR
= os
.path
.join(settings
.BASE_DIR
, '..', 'htdocs', 'media', 'logo')
36 def _last_modified(request
, size
, prefix
, filename
):
38 target
= os
.path
.join(LOGO_DIR
, size
, prefix
, filename
)
41 return datetime
.fromtimestamp(os
.path
.getmtime(target
))
49 @method_decorator(last_modified(_last_modified
))
50 def get(self
, request
, size
, prefix
, filename
):
54 target
= self
.get_thumbnail(size
, prefix
, filename
)
55 original
= self
.get_original(prefix
, filename
)
57 if os
.path
.exists(target
):
58 return self
.send_file(target
)
60 if not os
.path
.exists(original
):
61 raise Http404('Cover Art not available' + original
)
63 target_dir
= self
.get_dir(target
)
66 im
= Image
.open(original
)
67 if im
.mode
not in ('RGB', 'RGBA'):
68 im
= im
.convert('RGB')
70 raise Http404('Cannot open cover file')
73 im
.thumbnail((size
, size
), Image
.ANTIALIAS
)
77 # raised when trying to read an interlaced PNG;
78 # we use the original instead
79 return self
.send_file(original
)
81 # If it's a RGBA image, composite it onto a white background for JPEG
82 if resized
.mode
== 'RGBA':
83 background
= Image
.new('RGB', resized
.size
)
84 draw
= ImageDraw
.Draw(background
)
85 draw
.rectangle((-1, -1, resized
.size
[0]+1, resized
.size
[1]+1),
88 resized
= Image
.composite(resized
, background
, resized
)
90 io
= StringIO
.StringIO()
93 resized
.save(io
, 'JPEG', optimize
=True, progression
=True,
96 return self
.send_file(original
)
100 fp
= open(target
, 'wb')
104 return self
.send_file(target
)
106 # the length of the prefix is defined here and in web/urls.py
108 def get_prefix(filename
):
112 def get_thumbnail(size
, prefix
, filename
):
113 return os
.path
.join(LOGO_DIR
, str(size
), prefix
, filename
)
116 def get_existing_thumbnails(prefix
, filename
):
117 files
= glob(os
.path
.join(LOGO_DIR
, '*', prefix
, filename
))
118 return filter(lambda f
: 'original' not in f
, files
)
121 def get_original(prefix
, filename
):
122 return os
.path
.join(LOGO_DIR
, 'original', prefix
, filename
)
125 def get_dir(filename
):
126 path
= os
.path
.dirname(filename
)
130 except OSError as ose
:
131 if ose
.errno
!= errno
.EEXIST
:
136 def send_file(self
, filename
):
137 resp
= HttpResponse(content_type
='image/jpeg')
138 resp
.status_code
= 200