mirror of
https://github.com/Hopiu/django-imagekit.git
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301adc2087
Changed my mind about 04aa72c1f9. It's
just a better description, even if different strategies can change the
behavior so it isn't really very cache-like.
91 lines
3.1 KiB
Python
91 lines
3.1 KiB
Python
"""
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Functions responsible for returning filenames for the given image generator.
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Users are free to define their own functions; these are just some some sensible
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choices.
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"""
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from django.conf import settings
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import os
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from ..utils import format_to_extension, suggest_extension
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def source_name_as_path(generator):
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"""
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A namer that, given the following source file name::
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photos/thumbnails/bulldog.jpg
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will generate a name like this::
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/path/to/generated/images/photos/thumbnails/bulldog/5ff3233527c5ac3e4b596343b440ff67.jpg
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where "/path/to/generated/images/" is the value specified by the
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``IMAGEKIT_CACHEFILE_DIR`` setting.
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"""
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source_filename = getattr(generator.source, 'name', None)
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if source_filename is None or os.path.isabs(source_filename):
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# Generally, we put the file right in the cache file directory.
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dir = settings.IMAGEKIT_CACHEFILE_DIR
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else:
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# For source files with relative names (like Django media files),
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# use the source's name to create the new filename.
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dir = os.path.join(settings.IMAGEKIT_CACHEFILE_DIR,
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os.path.splitext(source_filename)[0])
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ext = suggest_extension(source_filename or '', generator.format)
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return os.path.normpath(os.path.join(dir,
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'%s%s' % (generator.get_hash(), ext)))
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def source_name_dot_hash(generator):
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"""
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A namer that, given the following source file name::
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photos/thumbnails/bulldog.jpg
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will generate a name like this::
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/path/to/generated/images/photos/thumbnails/bulldog.5ff3233527c5.jpg
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where "/path/to/generated/images/" is the value specified by the
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``IMAGEKIT_CACHEFILE_DIR`` setting.
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"""
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source_filename = getattr(generator.source, 'name', None)
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if source_filename is None or os.path.isabs(source_filename):
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# Generally, we put the file right in the cache file directory.
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dir = settings.IMAGEKIT_CACHEFILE_DIR
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else:
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# For source files with relative names (like Django media files),
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# use the source's name to create the new filename.
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dir = os.path.join(settings.IMAGEKIT_CACHEFILE_DIR,
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os.path.dirname(source_filename))
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ext = suggest_extension(source_filename or '', generator.format)
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basename = os.path.basename(source_filename)
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return os.path.normpath(os.path.join(dir, '%s.%s%s' % (
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os.path.splitext(basename)[0], generator.get_hash()[:12], ext)))
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def hash(generator):
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"""
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A namer that, given the following source file name::
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photos/thumbnails/bulldog.jpg
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will generate a name like this::
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/path/to/generated/images/5ff3233527c5ac3e4b596343b440ff67.jpg
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where "/path/to/generated/images/" is the value specified by the
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``IMAGEKIT_CACHEFILE_DIR`` setting.
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"""
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format = getattr(generator, 'format', None)
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ext = format_to_extension(format) if format else ''
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return os.path.normpath(os.path.join(settings.IMAGEKIT_CACHEFILE_DIR,
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'%s%s' % (generator.get_hash(), ext)))
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