mirror of https://github.com/zulip/zulip.git
55 lines
2.1 KiB
Python
55 lines
2.1 KiB
Python
# See https://zulip.readthedocs.io/en/latest/subsystems/thumbnailing.html
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from __future__ import absolute_import
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from six.moves import urllib
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from tornado.concurrent import return_future
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from thumbor.loaders import LoaderResult, file_loader, https_loader
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from tc_aws.loaders import s3_loader
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from thumbor.context import Context
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from .helpers import (
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separate_url_and_source_type,
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THUMBOR_S3_TYPE, THUMBOR_LOCAL_FILE_TYPE, THUMBOR_EXTERNAL_TYPE
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)
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from typing import Any, Callable
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import base64
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import logging
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def get_not_found_result():
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# type: () -> LoaderResult
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result = LoaderResult()
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result.error = LoaderResult.ERROR_NOT_FOUND
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result.successful = False
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return result
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@return_future
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def load(context, url, callback):
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# type: (Context, str, Callable[..., Any]) -> None
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source_type, encoded_url = separate_url_and_source_type(url)
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actual_url = base64.urlsafe_b64decode(urllib.parse.unquote(encoded_url))
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if source_type not in (THUMBOR_S3_TYPE, THUMBOR_LOCAL_FILE_TYPE,
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THUMBOR_EXTERNAL_TYPE):
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callback(get_not_found_result())
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logging.warning('INVALID SOURCE TYPE: ' + source_type)
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return
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if source_type == THUMBOR_S3_TYPE:
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if actual_url.startswith('/user_uploads/'): # type: ignore # python 2 type differs from python 3 type
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actual_url = actual_url[len('/user_uploads/'):]
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else:
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raise AssertionError("Unexpected s3 file.")
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s3_loader.load(context, actual_url, callback)
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elif source_type == THUMBOR_LOCAL_FILE_TYPE:
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if actual_url.startswith('/user_uploads/'): # type: ignore # python 2 type differs from python 3 type
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actual_url = actual_url[len('/user_uploads/'):]
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local_file_path_prefix = 'files/'
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else:
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raise AssertionError("Unexpected local file.")
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patched_local_url = local_file_path_prefix + actual_url # type: ignore # python 2 type differs from python 3 type
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file_loader.load(context, patched_local_url, callback)
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elif source_type == THUMBOR_EXTERNAL_TYPE:
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https_loader.load(context, actual_url, callback)
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