1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
|
from importlib import import_module
from django.utils import six
from django.utils.functional import LazyObject
# support legacy parser module usage
from compressor.parser.base import ParserBase # noqa
from compressor.parser.lxml import LxmlParser
from compressor.parser.default_htmlparser import DefaultHtmlParser as HtmlParser
from compressor.parser.beautifulsoup import BeautifulSoupParser # noqa
from compressor.parser.html5lib import Html5LibParser # noqa
class AutoSelectParser(LazyObject):
options = (
# TODO: make lxml.html parser first again
(six.moves.html_parser.__name__, HtmlParser), # fast and part of the Python stdlib
('lxml.html', LxmlParser), # lxml, extremely fast
)
def __init__(self, content):
self._wrapped = None
self._setup(content)
def __getattr__(self, name):
return getattr(self._wrapped, name)
def _setup(self, content):
for dependency, parser in self.options:
try:
import_module(dependency)
self._wrapped = parser(content)
break
except (ImportError, TypeError):
continue
|
