c12c271276
* Add top-level API * Add tests for top-level API * Further work towards parallel support * StatusCode tweaks * Drop erronous commit
32 lines
784 B
Python
32 lines
784 B
Python
import codecs
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import typing
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def normalize_header_key(value: typing.AnyStr, encoding: str = None) -> bytes:
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"""
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Coerce str/bytes into a strictly byte-wise HTTP header key.
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"""
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if isinstance(value, bytes):
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return value.lower()
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return value.encode(encoding or "ascii").lower()
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def normalize_header_value(value: typing.AnyStr, encoding: str = None) -> bytes:
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"""
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Coerce str/bytes into a strictly byte-wise HTTP header value.
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"""
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if isinstance(value, bytes):
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return value
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return value.encode(encoding or "ascii")
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def is_known_encoding(encoding: str) -> bool:
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"""
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Return `True` if `encoding` is a known codec.
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"""
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try:
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codecs.lookup(encoding)
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except LookupError:
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return False
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return True
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