Testing the ability to include libraries with the bot
This commit is contained in:
Luke Rogers
parent
c44b1dcd6a
commit
6b4042972b
18 changed files with 6477 additions and 12 deletions
244
lib/bs4/builder/_htmlparser.py
Normal file
244
lib/bs4/builder/_htmlparser.py
Normal file
|
|
@ -0,0 +1,244 @@
|
|||
"""Use the HTMLParser library to parse HTML files that aren't too bad."""
|
||||
|
||||
__all__ = [
|
||||
'HTMLParserTreeBuilder',
|
||||
]
|
||||
|
||||
from HTMLParser import (
|
||||
HTMLParser,
|
||||
HTMLParseError,
|
||||
)
|
||||
import sys
|
||||
import warnings
|
||||
|
||||
# Starting in Python 3.2, the HTMLParser constructor takes a 'strict'
|
||||
# argument, which we'd like to set to False. Unfortunately,
|
||||
# http://bugs.python.org/issue13273 makes strict=True a better bet
|
||||
# before Python 3.2.3.
|
||||
#
|
||||
# At the end of this file, we monkeypatch HTMLParser so that
|
||||
# strict=True works well on Python 3.2.2.
|
||||
major, minor, release = sys.version_info[:3]
|
||||
CONSTRUCTOR_TAKES_STRICT = (
|
||||
major > 3
|
||||
or (major == 3 and minor > 2)
|
||||
or (major == 3 and minor == 2 and release >= 3))
|
||||
|
||||
from bs4.element import (
|
||||
CData,
|
||||
Comment,
|
||||
Declaration,
|
||||
Doctype,
|
||||
ProcessingInstruction,
|
||||
)
|
||||
from bs4.dammit import EntitySubstitution, UnicodeDammit
|
||||
|
||||
from bs4.builder import (
|
||||
HTML,
|
||||
HTMLTreeBuilder,
|
||||
STRICT,
|
||||
)
|
||||
|
||||
|
||||
HTMLPARSER = 'html.parser'
|
||||
|
||||
class BeautifulSoupHTMLParser(HTMLParser):
|
||||
def handle_starttag(self, name, attrs):
|
||||
# XXX namespace
|
||||
self.soup.handle_starttag(name, None, None, dict(attrs))
|
||||
|
||||
def handle_endtag(self, name):
|
||||
self.soup.handle_endtag(name)
|
||||
|
||||
def handle_data(self, data):
|
||||
self.soup.handle_data(data)
|
||||
|
||||
def handle_charref(self, name):
|
||||
# XXX workaround for a bug in HTMLParser. Remove this once
|
||||
# it's fixed.
|
||||
if name.startswith('x'):
|
||||
real_name = int(name.lstrip('x'), 16)
|
||||
else:
|
||||
real_name = int(name)
|
||||
|
||||
try:
|
||||
data = unichr(real_name)
|
||||
except (ValueError, OverflowError), e:
|
||||
data = u"\N{REPLACEMENT CHARACTER}"
|
||||
|
||||
self.handle_data(data)
|
||||
|
||||
def handle_entityref(self, name):
|
||||
character = EntitySubstitution.HTML_ENTITY_TO_CHARACTER.get(name)
|
||||
if character is not None:
|
||||
data = character
|
||||
else:
|
||||
data = "&%s;" % name
|
||||
self.handle_data(data)
|
||||
|
||||
def handle_comment(self, data):
|
||||
self.soup.endData()
|
||||
self.soup.handle_data(data)
|
||||
self.soup.endData(Comment)
|
||||
|
||||
def handle_decl(self, data):
|
||||
self.soup.endData()
|
||||
if data.startswith("DOCTYPE "):
|
||||
data = data[len("DOCTYPE "):]
|
||||
self.soup.handle_data(data)
|
||||
self.soup.endData(Doctype)
|
||||
|
||||
def unknown_decl(self, data):
|
||||
if data.upper().startswith('CDATA['):
|
||||
cls = CData
|
||||
data = data[len('CDATA['):]
|
||||
else:
|
||||
cls = Declaration
|
||||
self.soup.endData()
|
||||
self.soup.handle_data(data)
|
||||
self.soup.endData(cls)
|
||||
|
||||
def handle_pi(self, data):
|
||||
self.soup.endData()
|
||||
if data.endswith("?") and data.lower().startswith("xml"):
|
||||
# "An XHTML processing instruction using the trailing '?'
|
||||
# will cause the '?' to be included in data." - HTMLParser
|
||||
# docs.
|
||||
#
|
||||
# Strip the question mark so we don't end up with two
|
||||
# question marks.
|
||||
data = data[:-1]
|
||||
self.soup.handle_data(data)
|
||||
self.soup.endData(ProcessingInstruction)
|
||||
|
||||
|
||||
class HTMLParserTreeBuilder(HTMLTreeBuilder):
|
||||
|
||||
is_xml = False
|
||||
features = [HTML, STRICT, HTMLPARSER]
|
||||
|
||||
def __init__(self, *args, **kwargs):
|
||||
if CONSTRUCTOR_TAKES_STRICT:
|
||||
kwargs['strict'] = False
|
||||
self.parser_args = (args, kwargs)
|
||||
|
||||
def prepare_markup(self, markup, user_specified_encoding=None,
|
||||
document_declared_encoding=None):
|
||||
"""
|
||||
:return: A 4-tuple (markup, original encoding, encoding
|
||||
declared within markup, whether any characters had to be
|
||||
replaced with REPLACEMENT CHARACTER).
|
||||
"""
|
||||
if isinstance(markup, unicode):
|
||||
return markup, None, None, False
|
||||
|
||||
try_encodings = [user_specified_encoding, document_declared_encoding]
|
||||
dammit = UnicodeDammit(markup, try_encodings, is_html=True)
|
||||
return (dammit.markup, dammit.original_encoding,
|
||||
dammit.declared_html_encoding,
|
||||
dammit.contains_replacement_characters)
|
||||
|
||||
def feed(self, markup):
|
||||
args, kwargs = self.parser_args
|
||||
parser = BeautifulSoupHTMLParser(*args, **kwargs)
|
||||
parser.soup = self.soup
|
||||
try:
|
||||
parser.feed(markup)
|
||||
except HTMLParseError, e:
|
||||
warnings.warn(RuntimeWarning(
|
||||
"Python's built-in HTMLParser cannot parse the given document. This is not a bug in Beautiful Soup. The best solution is to install an external parser (lxml or html5lib), and use Beautiful Soup with that parser. See http://www.crummy.com/software/BeautifulSoup/bs4/doc/#installing-a-parser for help."))
|
||||
raise e
|
||||
|
||||
# Patch 3.2 versions of HTMLParser earlier than 3.2.3 to use some
|
||||
# 3.2.3 code. This ensures they don't treat markup like <p></p> as a
|
||||
# string.
|
||||
#
|
||||
# XXX This code can be removed once most Python 3 users are on 3.2.3.
|
||||
if major == 3 and minor == 2 and not CONSTRUCTOR_TAKES_STRICT:
|
||||
import re
|
||||
attrfind_tolerant = re.compile(
|
||||
r'\s*((?<=[\'"\s])[^\s/>][^\s/=>]*)(\s*=+\s*'
|
||||
r'(\'[^\']*\'|"[^"]*"|(?![\'"])[^>\s]*))?')
|
||||
HTMLParserTreeBuilder.attrfind_tolerant = attrfind_tolerant
|
||||
|
||||
locatestarttagend = re.compile(r"""
|
||||
<[a-zA-Z][-.a-zA-Z0-9:_]* # tag name
|
||||
(?:\s+ # whitespace before attribute name
|
||||
(?:[a-zA-Z_][-.:a-zA-Z0-9_]* # attribute name
|
||||
(?:\s*=\s* # value indicator
|
||||
(?:'[^']*' # LITA-enclosed value
|
||||
|\"[^\"]*\" # LIT-enclosed value
|
||||
|[^'\">\s]+ # bare value
|
||||
)
|
||||
)?
|
||||
)
|
||||
)*
|
||||
\s* # trailing whitespace
|
||||
""", re.VERBOSE)
|
||||
BeautifulSoupHTMLParser.locatestarttagend = locatestarttagend
|
||||
|
||||
from html.parser import tagfind, attrfind
|
||||
|
||||
def parse_starttag(self, i):
|
||||
self.__starttag_text = None
|
||||
endpos = self.check_for_whole_start_tag(i)
|
||||
if endpos < 0:
|
||||
return endpos
|
||||
rawdata = self.rawdata
|
||||
self.__starttag_text = rawdata[i:endpos]
|
||||
|
||||
# Now parse the data between i+1 and j into a tag and attrs
|
||||
attrs = []
|
||||
match = tagfind.match(rawdata, i+1)
|
||||
assert match, 'unexpected call to parse_starttag()'
|
||||
k = match.end()
|
||||
self.lasttag = tag = rawdata[i+1:k].lower()
|
||||
while k < endpos:
|
||||
if self.strict:
|
||||
m = attrfind.match(rawdata, k)
|
||||
else:
|
||||
m = attrfind_tolerant.match(rawdata, k)
|
||||
if not m:
|
||||
break
|
||||
attrname, rest, attrvalue = m.group(1, 2, 3)
|
||||
if not rest:
|
||||
attrvalue = None
|
||||
elif attrvalue[:1] == '\'' == attrvalue[-1:] or \
|
||||
attrvalue[:1] == '"' == attrvalue[-1:]:
|
||||
attrvalue = attrvalue[1:-1]
|
||||
if attrvalue:
|
||||
attrvalue = self.unescape(attrvalue)
|
||||
attrs.append((attrname.lower(), attrvalue))
|
||||
k = m.end()
|
||||
|
||||
end = rawdata[k:endpos].strip()
|
||||
if end not in (">", "/>"):
|
||||
lineno, offset = self.getpos()
|
||||
if "\n" in self.__starttag_text:
|
||||
lineno = lineno + self.__starttag_text.count("\n")
|
||||
offset = len(self.__starttag_text) \
|
||||
- self.__starttag_text.rfind("\n")
|
||||
else:
|
||||
offset = offset + len(self.__starttag_text)
|
||||
if self.strict:
|
||||
self.error("junk characters in start tag: %r"
|
||||
% (rawdata[k:endpos][:20],))
|
||||
self.handle_data(rawdata[i:endpos])
|
||||
return endpos
|
||||
if end.endswith('/>'):
|
||||
# XHTML-style empty tag: <span attr="value" />
|
||||
self.handle_startendtag(tag, attrs)
|
||||
else:
|
||||
self.handle_starttag(tag, attrs)
|
||||
if tag in self.CDATA_CONTENT_ELEMENTS:
|
||||
self.set_cdata_mode(tag)
|
||||
return endpos
|
||||
|
||||
def set_cdata_mode(self, elem):
|
||||
self.cdata_elem = elem.lower()
|
||||
self.interesting = re.compile(r'</\s*%s\s*>' % self.cdata_elem, re.I)
|
||||
|
||||
BeautifulSoupHTMLParser.parse_starttag = parse_starttag
|
||||
BeautifulSoupHTMLParser.set_cdata_mode = set_cdata_mode
|
||||
|
||||
CONSTRUCTOR_TAKES_STRICT = True
|
||||
Reference in a new issue