49 lines
1.7 KiB
Python
49 lines
1.7 KiB
Python
"""Static file handling for HTTP component."""
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from pathlib import Path
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from aiohttp import hdrs
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from aiohttp.web import FileResponse
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from aiohttp.web_exceptions import HTTPForbidden, HTTPNotFound
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from aiohttp.web_urldispatcher import StaticResource
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# mypy: allow-untyped-defs
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CACHE_TIME = 31 * 86400 # = 1 month
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CACHE_HEADERS = {hdrs.CACHE_CONTROL: f"public, max-age={CACHE_TIME}"}
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class CachingStaticResource(StaticResource):
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"""Static Resource handler that will add cache headers."""
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async def _handle(self, request):
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rel_url = request.match_info["filename"]
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try:
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filename = Path(rel_url)
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if filename.anchor:
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# rel_url is an absolute name like
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# /static/\\machine_name\c$ or /static/D:\path
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# where the static dir is totally different
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raise HTTPForbidden()
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filepath = self._directory.joinpath(filename).resolve()
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if not self._follow_symlinks:
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filepath.relative_to(self._directory)
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except (ValueError, FileNotFoundError) as error:
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# relatively safe
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raise HTTPNotFound() from error
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except Exception as error:
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# perm error or other kind!
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request.app.logger.exception(error)
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raise HTTPNotFound() from error
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# on opening a dir, load its contents if allowed
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if filepath.is_dir():
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return await super()._handle(request)
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if filepath.is_file():
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return FileResponse(
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filepath,
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chunk_size=self._chunk_size,
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# type ignore: https://github.com/aio-libs/aiohttp/pull/3976
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headers=CACHE_HEADERS, # type: ignore
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)
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raise HTTPNotFound
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