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160 lines (130 loc) · 4.44 KB
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# coding: utf-8
import os
import re
import base64
import cStringIO
import StringIO
import leancloud
from leancloud import client
from leancloud import utils
from leancloud.mime_type import mime_types
__author__ = 'asaka <lan@leancloud.rocks>'
class File(object):
def __init__(self, name, data=None, type_=None):
self._name = name
self.id = None
self._url = None
self._acl = None
self.current_user = None # TODO
self._metadata = {
'owner': 'unknown'
}
if self.current_user and self.current_user is not None:
self._metadata['owner'] = self.current_user.id
pattern = re.compile('\.([^.]*)$')
extension = pattern.findall(name)
if extension:
extension = extension[0].lower()
else:
extension = None
if type_:
self._type = type_
else:
self._type = mime_types.get(extension, 'text/plain')
if data is None:
# self._source = cStringIO.StringIO()
self._source = None
elif isinstance(data, cStringIO.OutputType):
self._source = StringIO.StringIO(data.getvalue())
elif isinstance(data, StringIO.StringIO):
self._source = data
elif isinstance(data, file):
data.seek(0, os.SEEK_SET)
self._source = StringIO.StringIO(data.read())
elif isinstance(data, buffer):
self._source = StringIO.StringIO(data)
else:
raise TypeError('data must be a StringIO / buffer / file instance')
if self._source:
self._source.seek(0, os.SEEK_END)
self._metadata['size'] = self._source.tell()
self._source.seek(0, os.SEEK_SET)
@classmethod
def create_with_url(cls, name, url, meta_data=None, type_=None):
f = File(name, None, type_)
if meta_data:
f._metadata.update(meta_data)
f._url = url
f._metadata['__source'] = 'external'
return f
@classmethod
def create_without_data(cls, object_id):
f = File('')
f.id = object_id
return f
def get_acl(self):
return self._acl
def set_acl(self, acl):
if not isinstance(acl, leancloud.ACL):
raise TypeError('acl must be a leancloud.ACL instance')
self._acl = acl
@property
def name(self):
return self._name
@property
def url(self):
return self._url
@property
def size(self):
return self._metadata['size']
@property
def owner_id(self):
return self._metadata['owner']
@property
def metadata(self):
return self._metadata
def get_thumbnail_url(self, width, height, quality=100, scale_to_fit=True, fmt='png'):
if not self._url:
raise ValueError('invalid url')
if width < 0 or height < 0:
raise ValueError('invalid height or width params')
if quality > 100 or quality <= 0:
raise ValueError('quality must between 0 and 100')
mode = 2 if scale_to_fit else 1
return self.url + '?imageView/{0}/w/{1}/h/{2}/q/{3}/format/{4}'.format(mode, width, height, quality, fmt)
def destroy(self):
if not self.id:
return False
response = client.delete('/files/{0}'.format(self.id))
content = utils.response_to_json(response)
return response
def save(self):
if self._source:
output = cStringIO.StringIO()
self._source.seek(0)
base64.encode(self._source, output)
self._source.seek(0)
data = {
'base64': output.getvalue(),
'_ContentType': self._type,
'mime_type': self._type,
'metaData': self._metadata,
}
elif self._url and self.metadata['__source'] == 'external':
data = {
'name': self._name,
'ACL': self._acl,
'metaData': self._metadata,
'mime_type': self._type,
'url': self._url,
}
else:
raise ValueError
response = client.post('/files/{0}'.format(self._name), data)
content = utils.response_to_json(response)
self._name = content['name']
self._url = content['url']
self.id = content['objectId']
if 'size' in content:
self._metadata['size'] = content['size']
return self