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81 lines
2.7 KiB
Python
81 lines
2.7 KiB
Python
"""
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We are implementing transport to and from nextcloud (just like s3)
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"""
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import os
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import sys
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from transport.common import Reader,Writer, IEncoder
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import pandas as pd
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from io import StringIO
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import json
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import nextcloud_client as nextcloud
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class Nextcloud :
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def __init__(self,**_args):
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pass
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self._delimiter = None
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self._handler = nextcloud.Client(_args['url'])
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_uid = _args['uid']
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_token = _args['token']
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self._uri = _args['folder'] if 'folder' in _args else './'
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if self._uri.endswith('/') :
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self._uri = self._uri[:-1]
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self._file = None if 'file' not in _args else _args['file']
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self._handler.login(_uid,_token)
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def close(self):
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try:
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self._handler.logout()
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except Exception as e:
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pass
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class NextcloudReader(Nextcloud,Reader):
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def __init__(self,**_args):
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# self._file = [] if 'file' not in _args else _args['file']
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super().__init__(**_args)
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pass
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def read(self,**_args):
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_filename = self._file if 'file' not in _args else _args['file']
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#
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# @TODO: if _filename is none, an exception should be raised
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#
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_uri = '/'.join([self._uri,_filename])
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if self._handler.get_file(_uri) :
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#
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#
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_info = self._handler.file_info(_uri)
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_content = self._handler.get_file_contents(_uri).decode('utf8')
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if _info.get_content_type() == 'text/csv' :
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#
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# @TODO: enable handling of csv, xls, parquet, pickles
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_file = StringIO(_content)
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return pd.read_csv(_file)
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else:
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#
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# if it is neither a structured document like csv, we will return the content as is
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return _content
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return None
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class NextcloudWriter (Nextcloud,Writer):
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"""
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This class will write data to an instance of nextcloud
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"""
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def __init__(self,**_args) :
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super().__init__(**_args)
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self
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def write(self,_data,**_args):
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"""
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This function will upload a file to a given destination
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:file has the uri of the location of the file
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"""
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_filename = self._file if 'file' not in _args else _args['file']
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_uri = '/'.join([self._uri,_filename])
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if type(_data) == pd.DataFrame :
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f = StringIO()
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_data.to_csv(f,index=False)
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_content = f.getvalue()
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elif type(_data) == dict :
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_content = json.dumps(_data,cls=IEncoder)
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else:
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_content = str(_data)
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self._handler.put_file_contents(_uri,_content)
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