33 lines
1.1 KiB
Python
33 lines
1.1 KiB
Python
from django.utils.functional import LazyObject
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from django.utils.importlib import import_module
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# support legacy parser module usage
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from compressor.parser.base import ParserBase # noqa
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from compressor.parser.lxml import LxmlParser
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from compressor.parser.default_htmlparser import DefaultHtmlParser as HtmlParser
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from compressor.parser.beautifulsoup import BeautifulSoupParser # noqa
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from compressor.parser.html5lib import Html5LibParser # noqa
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class AutoSelectParser(LazyObject):
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options = (
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('lxml.html', LxmlParser), # lxml, extremely fast
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('HTMLParser', HtmlParser), # fast and part of the Python stdlib
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)
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def __init__(self, content):
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self._wrapped = None
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self._setup(content)
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def __getattr__(self, name):
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return getattr(self._wrapped, name)
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def _setup(self, content):
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for dependency, parser in self.options:
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try:
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import_module(dependency)
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self._wrapped = parser(content)
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break
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except ImportError:
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continue
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