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32 lines
1.0 KiB
Python
32 lines
1.0 KiB
Python
"""Pinned Google Brotli helper for the browser-decoded WebConfig asset."""
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from __future__ import annotations
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BROTLI_VERSION = "1.2.0"
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QUALITY = 11
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# Maximum RFC 7932/browser-compatible Brotli window (16 MiB). The page is
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# smaller than the default 4 MiB window, but pin the requested maximum anyway.
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LGWIN = 24
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try:
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import brotli
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except ImportError as error:
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raise RuntimeError(
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"Google Brotli 1.2.0 is required to generate the MeshCore WebConfig "
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"asset. Install it with 'python -m pip install -r "
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"requirements-build.txt'."
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) from error
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if brotli.__version__ != BROTLI_VERSION:
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raise RuntimeError(
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"MeshCore requires Google Brotli %s, but %s is installed. Run "
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"'python -m pip install -r requirements-build.txt'."
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% (BROTLI_VERSION, brotli.__version__)
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)
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def compress_html(data: bytes) -> bytes:
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"""Return a deterministic, maximum-quality RFC 7932 Brotli text stream."""
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return brotli.compress(data, mode=brotli.MODE_TEXT, quality=QUALITY,
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lgwin=LGWIN)
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