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pushpull.py
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168 lines (136 loc) · 5.38 KB
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import json
import os
import warnings
from functools import lru_cache
from typing import Type, TYPE_CHECKING
from urllib.request import Request, urlopen
from ....helper import get_request_header
if TYPE_CHECKING:
from ....types import T
@lru_cache()
def _get_cloud_api() -> str:
"""Get Cloud Api for transmiting data to the cloud.
:raises RuntimeError: Encounter error when fetching the cloud Api Url.
:return: Cloud Api Url
"""
if 'JINA_HUBBLE_REGISTRY' in os.environ:
u = os.environ['JINA_HUBBLE_REGISTRY']
else:
try:
req = Request(
'https://api.jina.ai/hub/hubble.json',
headers={'User-Agent': 'Mozilla/5.0'},
)
with urlopen(req) as resp:
u = json.load(resp)['url']
except Exception as ex:
raise RuntimeError(
f'Can not fetch Cloud API address from {req.full_url}'
) from ex
return u
class PushPullMixin:
"""Transmitting :class:`DocumentArray` via Jina Cloud Service"""
_max_bytes = 4 * 1024 * 1024 * 1024
def push(self, token: str, show_progress: bool = False) -> None:
"""Push this DocumentArray object to Jina Cloud which can be later retrieved via :meth:`.push`
.. note::
- Push with the same ``token`` will override the existing content.
- Kinda like a public clipboard where everyone can override anyone's content.
So to make your content survive longer, you may want to use longer & more complicated token.
- The lifetime of the content is not promised atm, could be a day, could be a week. Do not use it for
persistence. Only use this full temporary transmission/storage/clipboard.
:param token: a key that later can be used for retrieve this :class:`DocumentArray`.
:param show_progress: if to show a progress bar on pulling
"""
import requests
delimiter = os.urandom(32)
(data, ctype) = requests.packages.urllib3.filepost.encode_multipart_formdata(
{
'file': (
'DocumentArray',
delimiter,
),
'token': token,
}
)
headers = {'Content-Type': ctype, **get_request_header()}
_head, _tail = data.split(delimiter)
from rich.progress import track
def gen():
total_size = 0
for idx, d in enumerate(
track(self, description='Pushing', disable=not show_progress)
):
chunk = b''
if idx == 0:
chunk += _head
chunk += self._stream_header
if idx < len(self):
chunk += d._to_stream_bytes(protocol='protobuf', compress='gzip')
total_size += len(chunk)
if total_size > self._max_bytes:
warnings.warn(
f'DocumentArray is too big. Only first {idx} Documents are pushed'
)
break
yield chunk
yield _tail
res = requests.post(
f'{_get_cloud_api()}/v2/rpc/da.push', data=gen(), headers=headers
)
if res.status_code != 200:
json_res = res.json()
raise RuntimeError(
json_res.get('message', 'Failed to push DocumentArray to Jina Cloud'),
f'Status code: {res.status_code}',
)
@classmethod
def pull(
cls: Type['T'],
token: str,
show_progress: bool = False,
local_cache: bool = False,
*args,
**kwargs,
) -> 'T':
"""Pulling a :class:`DocumentArray` from Jina Cloud Service to local.
:param token: the upload token set during :meth:`.push`
:param show_progress: if to show a progress bar on pulling
:param local_cache: store the downloaded DocumentArray to local folder
:return: a :class:`DocumentArray` object
"""
import requests
url = f'{_get_cloud_api()}/v2/rpc/da.pull?token={token}'
response = requests.get(url)
if response.ok:
url = response.json()['data']['download']
else:
raise FileNotFoundError(
f'can not find `{token}` DocumentArray on the Cloud. Misspelled?'
)
with requests.get(
url,
stream=True,
headers=get_request_header(),
) as r:
r.raise_for_status()
_da_len = int(r.headers['Content-length'])
from .binary import LazyRequestReader
_source = LazyRequestReader(r)
if local_cache and os.path.exists(f'.cache/{token}'):
_cache_len = os.path.getsize(f'.cache/{token}')
if _cache_len == _da_len:
_source = f'.cache/{token}'
r = cls.load_binary(
_source,
protocol='protobuf',
compress='gzip',
_show_progress=show_progress,
*args,
**kwargs,
)
if isinstance(_source, LazyRequestReader) and local_cache:
os.makedirs('.cache', exist_ok=True)
with open(f'.cache/{token}', 'wb') as fp:
fp.write(_source.content)
return r