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89 lines
2.8 KiB
Python
89 lines
2.8 KiB
Python
import hashlib
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import sys
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from urllib.parse import urljoin
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from django.conf import settings
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from django.contrib.staticfiles.storage import staticfiles_storage
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class RelativeAbsoluteUrl:
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"""
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Represents a URL that can have both "relative" and "absolute" forms
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for various use either locally or remotely.
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"""
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absolute: str
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relative: str
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def __init__(self, absolute: str, relative: str | None = None):
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if "://" not in absolute:
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raise ValueError(f"Absolute URL {absolute!r} is not absolute!")
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self.absolute = absolute
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self.relative = relative or absolute
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class AutoAbsoluteUrl(RelativeAbsoluteUrl):
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"""
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Automatically makes the absolute variant by using either settings.MAIN_DOMAIN
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or a passed identity's URI domain.
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"""
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def __init__(
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self,
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relative: str,
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identity=None,
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):
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self.relative = relative
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if identity:
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absolute_prefix = f"https://{identity.domain.uri_domain}/"
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else:
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absolute_prefix = f"https://{settings.MAIN_DOMAIN}/"
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self.absolute = urljoin(absolute_prefix, self.relative)
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class ProxyAbsoluteUrl(AutoAbsoluteUrl):
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"""
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AutoAbsoluteUrl variant for proxy paths, that also attaches a remote URI hash
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plus extension to the end if it can.
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"""
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def __init__(
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self,
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relative: str,
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identity=None,
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remote_url: str | None = None,
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):
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if remote_url:
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# See if there is a file extension we can grab
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extension = "bin"
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remote_filename = remote_url.split("/")[-1]
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if "." in remote_filename:
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extension = remote_filename.split(".")[-1]
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# When provided, attach a hash of the remote URL
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# SHA1 chosen as it generally has the best performance in modern python, and security is not a concern
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# Hash truncation is generally fine, as in the typical use case the hash is scoped to the identity PK.
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relative += f"{hashlib.sha1(remote_url.encode('ascii')).hexdigest()[:10]}.{extension}"
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super().__init__(relative, identity)
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class StaticAbsoluteUrl(RelativeAbsoluteUrl):
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"""
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Creates static URLs given only the static-relative path
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"""
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def __init__(self, path: str):
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try:
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static_url = staticfiles_storage.url(path)
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except ValueError:
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# Suppress static issues during the first collectstatic
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# Yes, I know it's a big hack! Pull requests welcome :)
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if "collectstatic" in sys.argv:
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super().__init__("https://example.com/")
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return
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raise
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if "://" in static_url:
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super().__init__(static_url)
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else:
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super().__init__(
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urljoin(f"https://{settings.MAIN_DOMAIN}/", static_url), static_url
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)
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