asd
This commit is contained in:
@ -0,0 +1,27 @@
|
||||
"""
|
||||
General functions for HTML manipulation, backported from Py3.
|
||||
|
||||
Note that this uses Python 2.7 code with the corresponding Python 3
|
||||
module names and locations.
|
||||
"""
|
||||
|
||||
from __future__ import unicode_literals
|
||||
|
||||
|
||||
_escape_map = {ord('&'): '&', ord('<'): '<', ord('>'): '>'}
|
||||
_escape_map_full = {ord('&'): '&', ord('<'): '<', ord('>'): '>',
|
||||
ord('"'): '"', ord('\''): '''}
|
||||
|
||||
# NB: this is a candidate for a bytes/string polymorphic interface
|
||||
|
||||
def escape(s, quote=True):
|
||||
"""
|
||||
Replace special characters "&", "<" and ">" to HTML-safe sequences.
|
||||
If the optional flag quote is true (the default), the quotation mark
|
||||
characters, both double quote (") and single quote (') characters are also
|
||||
translated.
|
||||
"""
|
||||
assert not isinstance(s, bytes), 'Pass a unicode string'
|
||||
if quote:
|
||||
return s.translate(_escape_map_full)
|
||||
return s.translate(_escape_map)
|
||||
2514
venv/lib/python3.12/site-packages/future/backports/html/entities.py
Normal file
2514
venv/lib/python3.12/site-packages/future/backports/html/entities.py
Normal file
File diff suppressed because it is too large
Load Diff
@ -0,0 +1,536 @@
|
||||
"""A parser for HTML and XHTML.
|
||||
|
||||
Backported for python-future from Python 3.3.
|
||||
"""
|
||||
|
||||
# This file is based on sgmllib.py, but the API is slightly different.
|
||||
|
||||
# XXX There should be a way to distinguish between PCDATA (parsed
|
||||
# character data -- the normal case), RCDATA (replaceable character
|
||||
# data -- only char and entity references and end tags are special)
|
||||
# and CDATA (character data -- only end tags are special).
|
||||
|
||||
from __future__ import (absolute_import, division,
|
||||
print_function, unicode_literals)
|
||||
from future.builtins import *
|
||||
from future.backports import _markupbase
|
||||
import re
|
||||
import warnings
|
||||
|
||||
# Regular expressions used for parsing
|
||||
|
||||
interesting_normal = re.compile('[&<]')
|
||||
incomplete = re.compile('&[a-zA-Z#]')
|
||||
|
||||
entityref = re.compile('&([a-zA-Z][-.a-zA-Z0-9]*)[^a-zA-Z0-9]')
|
||||
charref = re.compile('&#(?:[0-9]+|[xX][0-9a-fA-F]+)[^0-9a-fA-F]')
|
||||
|
||||
starttagopen = re.compile('<[a-zA-Z]')
|
||||
piclose = re.compile('>')
|
||||
commentclose = re.compile(r'--\s*>')
|
||||
tagfind = re.compile('([a-zA-Z][-.a-zA-Z0-9:_]*)(?:\s|/(?!>))*')
|
||||
# see http://www.w3.org/TR/html5/tokenization.html#tag-open-state
|
||||
# and http://www.w3.org/TR/html5/tokenization.html#tag-name-state
|
||||
tagfind_tolerant = re.compile('[a-zA-Z][^\t\n\r\f />\x00]*')
|
||||
# Note:
|
||||
# 1) the strict attrfind isn't really strict, but we can't make it
|
||||
# correctly strict without breaking backward compatibility;
|
||||
# 2) if you change attrfind remember to update locatestarttagend too;
|
||||
# 3) if you change attrfind and/or locatestarttagend the parser will
|
||||
# explode, so don't do it.
|
||||
attrfind = re.compile(
|
||||
r'\s*([a-zA-Z_][-.:a-zA-Z_0-9]*)(\s*=\s*'
|
||||
r'(\'[^\']*\'|"[^"]*"|[^\s"\'=<>`]*))?')
|
||||
attrfind_tolerant = re.compile(
|
||||
r'((?<=[\'"\s/])[^\s/>][^\s/=>]*)(\s*=+\s*'
|
||||
r'(\'[^\']*\'|"[^"]*"|(?![\'"])[^>\s]*))?(?:\s|/(?!>))*')
|
||||
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)
|
||||
locatestarttagend_tolerant = re.compile(r"""
|
||||
<[a-zA-Z][-.a-zA-Z0-9:_]* # tag name
|
||||
(?:[\s/]* # optional whitespace before attribute name
|
||||
(?:(?<=['"\s/])[^\s/>][^\s/=>]* # attribute name
|
||||
(?:\s*=+\s* # value indicator
|
||||
(?:'[^']*' # LITA-enclosed value
|
||||
|"[^"]*" # LIT-enclosed value
|
||||
|(?!['"])[^>\s]* # bare value
|
||||
)
|
||||
(?:\s*,)* # possibly followed by a comma
|
||||
)?(?:\s|/(?!>))*
|
||||
)*
|
||||
)?
|
||||
\s* # trailing whitespace
|
||||
""", re.VERBOSE)
|
||||
endendtag = re.compile('>')
|
||||
# the HTML 5 spec, section 8.1.2.2, doesn't allow spaces between
|
||||
# </ and the tag name, so maybe this should be fixed
|
||||
endtagfind = re.compile('</\s*([a-zA-Z][-.a-zA-Z0-9:_]*)\s*>')
|
||||
|
||||
|
||||
class HTMLParseError(Exception):
|
||||
"""Exception raised for all parse errors."""
|
||||
|
||||
def __init__(self, msg, position=(None, None)):
|
||||
assert msg
|
||||
self.msg = msg
|
||||
self.lineno = position[0]
|
||||
self.offset = position[1]
|
||||
|
||||
def __str__(self):
|
||||
result = self.msg
|
||||
if self.lineno is not None:
|
||||
result = result + ", at line %d" % self.lineno
|
||||
if self.offset is not None:
|
||||
result = result + ", column %d" % (self.offset + 1)
|
||||
return result
|
||||
|
||||
|
||||
class HTMLParser(_markupbase.ParserBase):
|
||||
"""Find tags and other markup and call handler functions.
|
||||
|
||||
Usage:
|
||||
p = HTMLParser()
|
||||
p.feed(data)
|
||||
...
|
||||
p.close()
|
||||
|
||||
Start tags are handled by calling self.handle_starttag() or
|
||||
self.handle_startendtag(); end tags by self.handle_endtag(). The
|
||||
data between tags is passed from the parser to the derived class
|
||||
by calling self.handle_data() with the data as argument (the data
|
||||
may be split up in arbitrary chunks). Entity references are
|
||||
passed by calling self.handle_entityref() with the entity
|
||||
reference as the argument. Numeric character references are
|
||||
passed to self.handle_charref() with the string containing the
|
||||
reference as the argument.
|
||||
"""
|
||||
|
||||
CDATA_CONTENT_ELEMENTS = ("script", "style")
|
||||
|
||||
def __init__(self, strict=False):
|
||||
"""Initialize and reset this instance.
|
||||
|
||||
If strict is set to False (the default) the parser will parse invalid
|
||||
markup, otherwise it will raise an error. Note that the strict mode
|
||||
is deprecated.
|
||||
"""
|
||||
if strict:
|
||||
warnings.warn("The strict mode is deprecated.",
|
||||
DeprecationWarning, stacklevel=2)
|
||||
self.strict = strict
|
||||
self.reset()
|
||||
|
||||
def reset(self):
|
||||
"""Reset this instance. Loses all unprocessed data."""
|
||||
self.rawdata = ''
|
||||
self.lasttag = '???'
|
||||
self.interesting = interesting_normal
|
||||
self.cdata_elem = None
|
||||
_markupbase.ParserBase.reset(self)
|
||||
|
||||
def feed(self, data):
|
||||
r"""Feed data to the parser.
|
||||
|
||||
Call this as often as you want, with as little or as much text
|
||||
as you want (may include '\n').
|
||||
"""
|
||||
self.rawdata = self.rawdata + data
|
||||
self.goahead(0)
|
||||
|
||||
def close(self):
|
||||
"""Handle any buffered data."""
|
||||
self.goahead(1)
|
||||
|
||||
def error(self, message):
|
||||
raise HTMLParseError(message, self.getpos())
|
||||
|
||||
__starttag_text = None
|
||||
|
||||
def get_starttag_text(self):
|
||||
"""Return full source of start tag: '<...>'."""
|
||||
return self.__starttag_text
|
||||
|
||||
def set_cdata_mode(self, elem):
|
||||
self.cdata_elem = elem.lower()
|
||||
self.interesting = re.compile(r'</\s*%s\s*>' % self.cdata_elem, re.I)
|
||||
|
||||
def clear_cdata_mode(self):
|
||||
self.interesting = interesting_normal
|
||||
self.cdata_elem = None
|
||||
|
||||
# Internal -- handle data as far as reasonable. May leave state
|
||||
# and data to be processed by a subsequent call. If 'end' is
|
||||
# true, force handling all data as if followed by EOF marker.
|
||||
def goahead(self, end):
|
||||
rawdata = self.rawdata
|
||||
i = 0
|
||||
n = len(rawdata)
|
||||
while i < n:
|
||||
match = self.interesting.search(rawdata, i) # < or &
|
||||
if match:
|
||||
j = match.start()
|
||||
else:
|
||||
if self.cdata_elem:
|
||||
break
|
||||
j = n
|
||||
if i < j: self.handle_data(rawdata[i:j])
|
||||
i = self.updatepos(i, j)
|
||||
if i == n: break
|
||||
startswith = rawdata.startswith
|
||||
if startswith('<', i):
|
||||
if starttagopen.match(rawdata, i): # < + letter
|
||||
k = self.parse_starttag(i)
|
||||
elif startswith("</", i):
|
||||
k = self.parse_endtag(i)
|
||||
elif startswith("<!--", i):
|
||||
k = self.parse_comment(i)
|
||||
elif startswith("<?", i):
|
||||
k = self.parse_pi(i)
|
||||
elif startswith("<!", i):
|
||||
if self.strict:
|
||||
k = self.parse_declaration(i)
|
||||
else:
|
||||
k = self.parse_html_declaration(i)
|
||||
elif (i + 1) < n:
|
||||
self.handle_data("<")
|
||||
k = i + 1
|
||||
else:
|
||||
break
|
||||
if k < 0:
|
||||
if not end:
|
||||
break
|
||||
if self.strict:
|
||||
self.error("EOF in middle of construct")
|
||||
k = rawdata.find('>', i + 1)
|
||||
if k < 0:
|
||||
k = rawdata.find('<', i + 1)
|
||||
if k < 0:
|
||||
k = i + 1
|
||||
else:
|
||||
k += 1
|
||||
self.handle_data(rawdata[i:k])
|
||||
i = self.updatepos(i, k)
|
||||
elif startswith("&#", i):
|
||||
match = charref.match(rawdata, i)
|
||||
if match:
|
||||
name = match.group()[2:-1]
|
||||
self.handle_charref(name)
|
||||
k = match.end()
|
||||
if not startswith(';', k-1):
|
||||
k = k - 1
|
||||
i = self.updatepos(i, k)
|
||||
continue
|
||||
else:
|
||||
if ";" in rawdata[i:]: #bail by consuming &#
|
||||
self.handle_data(rawdata[0:2])
|
||||
i = self.updatepos(i, 2)
|
||||
break
|
||||
elif startswith('&', i):
|
||||
match = entityref.match(rawdata, i)
|
||||
if match:
|
||||
name = match.group(1)
|
||||
self.handle_entityref(name)
|
||||
k = match.end()
|
||||
if not startswith(';', k-1):
|
||||
k = k - 1
|
||||
i = self.updatepos(i, k)
|
||||
continue
|
||||
match = incomplete.match(rawdata, i)
|
||||
if match:
|
||||
# match.group() will contain at least 2 chars
|
||||
if end and match.group() == rawdata[i:]:
|
||||
if self.strict:
|
||||
self.error("EOF in middle of entity or char ref")
|
||||
else:
|
||||
if k <= i:
|
||||
k = n
|
||||
i = self.updatepos(i, i + 1)
|
||||
# incomplete
|
||||
break
|
||||
elif (i + 1) < n:
|
||||
# not the end of the buffer, and can't be confused
|
||||
# with some other construct
|
||||
self.handle_data("&")
|
||||
i = self.updatepos(i, i + 1)
|
||||
else:
|
||||
break
|
||||
else:
|
||||
assert 0, "interesting.search() lied"
|
||||
# end while
|
||||
if end and i < n and not self.cdata_elem:
|
||||
self.handle_data(rawdata[i:n])
|
||||
i = self.updatepos(i, n)
|
||||
self.rawdata = rawdata[i:]
|
||||
|
||||
# Internal -- parse html declarations, return length or -1 if not terminated
|
||||
# See w3.org/TR/html5/tokenization.html#markup-declaration-open-state
|
||||
# See also parse_declaration in _markupbase
|
||||
def parse_html_declaration(self, i):
|
||||
rawdata = self.rawdata
|
||||
assert rawdata[i:i+2] == '<!', ('unexpected call to '
|
||||
'parse_html_declaration()')
|
||||
if rawdata[i:i+4] == '<!--':
|
||||
# this case is actually already handled in goahead()
|
||||
return self.parse_comment(i)
|
||||
elif rawdata[i:i+3] == '<![':
|
||||
return self.parse_marked_section(i)
|
||||
elif rawdata[i:i+9].lower() == '<!doctype':
|
||||
# find the closing >
|
||||
gtpos = rawdata.find('>', i+9)
|
||||
if gtpos == -1:
|
||||
return -1
|
||||
self.handle_decl(rawdata[i+2:gtpos])
|
||||
return gtpos+1
|
||||
else:
|
||||
return self.parse_bogus_comment(i)
|
||||
|
||||
# Internal -- parse bogus comment, return length or -1 if not terminated
|
||||
# see http://www.w3.org/TR/html5/tokenization.html#bogus-comment-state
|
||||
def parse_bogus_comment(self, i, report=1):
|
||||
rawdata = self.rawdata
|
||||
assert rawdata[i:i+2] in ('<!', '</'), ('unexpected call to '
|
||||
'parse_comment()')
|
||||
pos = rawdata.find('>', i+2)
|
||||
if pos == -1:
|
||||
return -1
|
||||
if report:
|
||||
self.handle_comment(rawdata[i+2:pos])
|
||||
return pos + 1
|
||||
|
||||
# Internal -- parse processing instr, return end or -1 if not terminated
|
||||
def parse_pi(self, i):
|
||||
rawdata = self.rawdata
|
||||
assert rawdata[i:i+2] == '<?', 'unexpected call to parse_pi()'
|
||||
match = piclose.search(rawdata, i+2) # >
|
||||
if not match:
|
||||
return -1
|
||||
j = match.start()
|
||||
self.handle_pi(rawdata[i+2: j])
|
||||
j = match.end()
|
||||
return j
|
||||
|
||||
# Internal -- handle starttag, return end or -1 if not terminated
|
||||
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 = match.group(1).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
|
||||
|
||||
# Internal -- check to see if we have a complete starttag; return end
|
||||
# or -1 if incomplete.
|
||||
def check_for_whole_start_tag(self, i):
|
||||
rawdata = self.rawdata
|
||||
if self.strict:
|
||||
m = locatestarttagend.match(rawdata, i)
|
||||
else:
|
||||
m = locatestarttagend_tolerant.match(rawdata, i)
|
||||
if m:
|
||||
j = m.end()
|
||||
next = rawdata[j:j+1]
|
||||
if next == ">":
|
||||
return j + 1
|
||||
if next == "/":
|
||||
if rawdata.startswith("/>", j):
|
||||
return j + 2
|
||||
if rawdata.startswith("/", j):
|
||||
# buffer boundary
|
||||
return -1
|
||||
# else bogus input
|
||||
if self.strict:
|
||||
self.updatepos(i, j + 1)
|
||||
self.error("malformed empty start tag")
|
||||
if j > i:
|
||||
return j
|
||||
else:
|
||||
return i + 1
|
||||
if next == "":
|
||||
# end of input
|
||||
return -1
|
||||
if next in ("abcdefghijklmnopqrstuvwxyz=/"
|
||||
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"):
|
||||
# end of input in or before attribute value, or we have the
|
||||
# '/' from a '/>' ending
|
||||
return -1
|
||||
if self.strict:
|
||||
self.updatepos(i, j)
|
||||
self.error("malformed start tag")
|
||||
if j > i:
|
||||
return j
|
||||
else:
|
||||
return i + 1
|
||||
raise AssertionError("we should not get here!")
|
||||
|
||||
# Internal -- parse endtag, return end or -1 if incomplete
|
||||
def parse_endtag(self, i):
|
||||
rawdata = self.rawdata
|
||||
assert rawdata[i:i+2] == "</", "unexpected call to parse_endtag"
|
||||
match = endendtag.search(rawdata, i+1) # >
|
||||
if not match:
|
||||
return -1
|
||||
gtpos = match.end()
|
||||
match = endtagfind.match(rawdata, i) # </ + tag + >
|
||||
if not match:
|
||||
if self.cdata_elem is not None:
|
||||
self.handle_data(rawdata[i:gtpos])
|
||||
return gtpos
|
||||
if self.strict:
|
||||
self.error("bad end tag: %r" % (rawdata[i:gtpos],))
|
||||
# find the name: w3.org/TR/html5/tokenization.html#tag-name-state
|
||||
namematch = tagfind_tolerant.match(rawdata, i+2)
|
||||
if not namematch:
|
||||
# w3.org/TR/html5/tokenization.html#end-tag-open-state
|
||||
if rawdata[i:i+3] == '</>':
|
||||
return i+3
|
||||
else:
|
||||
return self.parse_bogus_comment(i)
|
||||
tagname = namematch.group().lower()
|
||||
# consume and ignore other stuff between the name and the >
|
||||
# Note: this is not 100% correct, since we might have things like
|
||||
# </tag attr=">">, but looking for > after tha name should cover
|
||||
# most of the cases and is much simpler
|
||||
gtpos = rawdata.find('>', namematch.end())
|
||||
self.handle_endtag(tagname)
|
||||
return gtpos+1
|
||||
|
||||
elem = match.group(1).lower() # script or style
|
||||
if self.cdata_elem is not None:
|
||||
if elem != self.cdata_elem:
|
||||
self.handle_data(rawdata[i:gtpos])
|
||||
return gtpos
|
||||
|
||||
self.handle_endtag(elem.lower())
|
||||
self.clear_cdata_mode()
|
||||
return gtpos
|
||||
|
||||
# Overridable -- finish processing of start+end tag: <tag.../>
|
||||
def handle_startendtag(self, tag, attrs):
|
||||
self.handle_starttag(tag, attrs)
|
||||
self.handle_endtag(tag)
|
||||
|
||||
# Overridable -- handle start tag
|
||||
def handle_starttag(self, tag, attrs):
|
||||
pass
|
||||
|
||||
# Overridable -- handle end tag
|
||||
def handle_endtag(self, tag):
|
||||
pass
|
||||
|
||||
# Overridable -- handle character reference
|
||||
def handle_charref(self, name):
|
||||
pass
|
||||
|
||||
# Overridable -- handle entity reference
|
||||
def handle_entityref(self, name):
|
||||
pass
|
||||
|
||||
# Overridable -- handle data
|
||||
def handle_data(self, data):
|
||||
pass
|
||||
|
||||
# Overridable -- handle comment
|
||||
def handle_comment(self, data):
|
||||
pass
|
||||
|
||||
# Overridable -- handle declaration
|
||||
def handle_decl(self, decl):
|
||||
pass
|
||||
|
||||
# Overridable -- handle processing instruction
|
||||
def handle_pi(self, data):
|
||||
pass
|
||||
|
||||
def unknown_decl(self, data):
|
||||
if self.strict:
|
||||
self.error("unknown declaration: %r" % (data,))
|
||||
|
||||
# Internal -- helper to remove special character quoting
|
||||
def unescape(self, s):
|
||||
if '&' not in s:
|
||||
return s
|
||||
def replaceEntities(s):
|
||||
s = s.groups()[0]
|
||||
try:
|
||||
if s[0] == "#":
|
||||
s = s[1:]
|
||||
if s[0] in ['x','X']:
|
||||
c = int(s[1:].rstrip(';'), 16)
|
||||
else:
|
||||
c = int(s.rstrip(';'))
|
||||
return chr(c)
|
||||
except ValueError:
|
||||
return '&#' + s
|
||||
else:
|
||||
from future.backports.html.entities import html5
|
||||
if s in html5:
|
||||
return html5[s]
|
||||
elif s.endswith(';'):
|
||||
return '&' + s
|
||||
for x in range(2, len(s)):
|
||||
if s[:x] in html5:
|
||||
return html5[s[:x]] + s[x:]
|
||||
else:
|
||||
return '&' + s
|
||||
|
||||
return re.sub(r"&(#?[xX]?(?:[0-9a-fA-F]+;|\w{1,32};?))",
|
||||
replaceEntities, s)
|
||||
Reference in New Issue
Block a user