mirror of https://github.com/zulip/zulip.git
51 lines
1.7 KiB
Python
51 lines
1.7 KiB
Python
# See https://zulip.readthedocs.io/en/latest/subsystems/thumbnailing.html
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import base64
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import logging
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import urllib.parse
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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 thumbor.loaders import LoaderResult, file_loader, https_loader
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from .helpers import (
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THUMBOR_EXTERNAL_TYPE,
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THUMBOR_LOCAL_FILE_TYPE,
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THUMBOR_S3_TYPE,
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separate_url_and_source_type,
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)
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def get_not_found_result() -> 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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async def load(context: Context, url: str) -> LoaderResult:
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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)).decode("utf-8")
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if source_type == THUMBOR_S3_TYPE:
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if actual_url.startswith("/user_uploads/"):
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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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return await s3_loader.load(context, actual_url)
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elif source_type == THUMBOR_LOCAL_FILE_TYPE:
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if actual_url.startswith("/user_uploads/"):
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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
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return await file_loader.load(context, patched_local_url)
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elif source_type == THUMBOR_EXTERNAL_TYPE:
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return await https_loader.load(context, actual_url)
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else:
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logging.warning("INVALID SOURCE TYPE: " + source_type)
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return get_not_found_result()
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