94 lines
2.3 KiB
Python
94 lines
2.3 KiB
Python
# -*- coding: utf-8 -*-
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import os
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import tempfile
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from uuid import uuid4
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from django.core.cache import cache
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from django.core.files.storage import default_storage
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from django.core.files.base import ContentFile
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class BaseStorage(object):
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def __init__(self, name=None):
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self.name = name
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def save(self, data, mode='w'):
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raise NotImplementedError
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def read(self, read_mode='r'):
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raise NotImplementedError
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def remove(self):
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raise NotImplementedError
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class TempFolderStorage(BaseStorage):
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def open(self, mode='r'):
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if self.name:
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return open(self.get_full_path(), mode)
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else:
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tmp_file = tempfile.NamedTemporaryFile(delete=False)
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self.name = tmp_file.name
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return tmp_file
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def save(self, data, mode='w'):
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with self.open(mode=mode) as file:
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file.write(data)
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def read(self, mode='r'):
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with self.open(mode=mode) as file:
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return file.read()
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def remove(self):
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os.remove(self.get_full_path())
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def get_full_path(self):
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return os.path.join(
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tempfile.gettempdir(),
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self.name
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)
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class CacheStorage(BaseStorage):
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"""
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By default memcache maximum size per key is 1MB, be careful with large files.
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"""
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CACHE_LIFETIME = 86400
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CACHE_PREFIX = u'django-import-export-'
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def save(self, data, mode=None):
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if not self.name:
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self.name = uuid4().hex
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cache.set(self.CACHE_PREFIX + self.name, data, self.CACHE_LIFETIME)
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def read(self, read_mode='r'):
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return cache.get(self.CACHE_PREFIX + self.name)
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def remove(self):
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cache.delete(self.name)
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class MediaStorage(BaseStorage):
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MEDIA_FOLDER = 'django-import-export'
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def save(self, data, mode=None):
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if not self.name:
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self.name = uuid4().hex
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default_storage.save(self.get_full_path(), ContentFile(data))
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def read(self, read_mode='rb'):
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with default_storage.open(self.get_full_path(), mode=read_mode) as f:
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return f.read()
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def remove(self):
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default_storage.delete(self.get_full_path())
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def get_full_path(self):
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return os.path.join(
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self.MEDIA_FOLDER,
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self.name
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)
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