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""" |
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This module implement a filesystem storage adapter. |
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""" |
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import errno |
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import logging |
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import os |
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from flask import current_app |
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from .interface import ImagineAdapterInterface |
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from PIL import Image |
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LOGGER = logging.getLogger(__name__) |
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class ImagineFilesystemAdapter(ImagineAdapterInterface): |
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""" |
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Filesystem storage adapter |
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""" |
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source_folder = None |
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cache_folder = None |
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def __init__(self, **kwargs): |
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""" |
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Init adapter |
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:param kwargs: parameters |
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:return: |
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""" |
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if 'source_folder' in kwargs: |
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self.source_folder = kwargs.pop('source_folder').strip('/') |
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else: |
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raise ValueError('Source folder does not set.') |
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self.cache_folder = kwargs.pop('cache_folder', 'cache').strip('/') |
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def get_item(self, path): |
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""" |
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Get resource item |
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:param path: string |
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:return: Image |
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""" |
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item_path = '%s/%s/%s' % ( |
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current_app.root_path, |
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self.source_folder, |
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path.strip('/') |
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) |
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if os.path.isfile(item_path): |
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try: |
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return Image.open(item_path) |
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except IOError, e: |
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LOGGER.warning('File not found on path "%s" with error: %s' % (item_path, unicode(e))) |
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return False |
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else: |
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return False |
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def create_cached_item(self, path, content): |
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""" |
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Create cached resource item |
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:param path: string |
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:param content: Image |
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:return: |
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""" |
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if isinstance(content, Image.Image): |
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item_path = '%s/%s/%s/%s' % ( |
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current_app.root_path, |
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self.source_folder, |
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self.cache_folder, |
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path.strip('/') |
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) |
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self.make_dirs(item_path) |
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content.save(item_path) |
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if os.path.isfile(item_path): |
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return '/%s/%s/%s' % (self.source_folder, self.cache_folder, path.strip('/')) |
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else: |
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LOGGER.warning('File is not created on path: %s' % item_path) |
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return False |
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else: |
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return False |
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def get_cached_item(self, path): |
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""" |
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Get cached resource item |
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:param path: string |
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:return: |
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""" |
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item_path = '%s/%s/%s/%s' % ( |
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current_app.root_path, |
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self.source_folder, |
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self.cache_folder, |
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path.strip('/') |
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) |
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if os.path.isfile(item_path): |
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try: |
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return Image.open(item_path) |
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except IOError, e: |
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LOGGER.warning('Cached file not found on path "%s" with error: %s' % (item_path, unicode(e))) |
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return False |
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else: |
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return False |
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103
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def check_cached_item(self, path): |
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""" |
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Check for cached resource item exists |
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:param path: string |
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:return: |
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""" |
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item_path = '%s/%s/%s/%s' % ( |
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current_app.root_path, |
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self.source_folder, |
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112
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self.cache_folder, |
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path.strip('/') |
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114
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) |
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115
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116
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return os.path.isfile(item_path) |
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def remove_cached_item(self, path): |
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""" |
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120
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Remove cached resource item |
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121
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:param path: string |
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122
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:return: |
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123
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""" |
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124
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item_path = '%s/%s/%s/%s' % ( |
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current_app.root_path, |
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self.source_folder, |
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127
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self.cache_folder, |
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128
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path.strip('/') |
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129
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) |
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130
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131
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if os.path.isfile(item_path): |
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os.remove(item_path) |
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133
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134
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return True |
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135
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136
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@staticmethod |
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137
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def make_dirs(path): |
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138
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""" |
|
139
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Create directories if not exist |
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140
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:param path: string |
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141
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:return: |
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142
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""" |
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143
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try: |
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144
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os.makedirs(os.path.dirname(path)) |
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145
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except OSError as e: |
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146
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if e.errno != errno.EEXIST: |
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147
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LOGGER.error('Failed to create directory %s with error: %s' % (path, unicode(e))) |
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148
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raise |
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149
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FlaskGuys /
Flask-Imagine
