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from
__future__
import
absolute_import
,
division
,
unicode_literals
try
:
chr
=
unichr
# flake8: noqa
except
NameError
:
pass
from
collections
import
deque
from
.
constants
import
spaceCharacters
from
.
constants
import
entities
from
.
constants
import
asciiLetters
,
asciiUpper2Lower
from
.
constants
import
digits
,
hexDigits
,
EOF
from
.
constants
import
tokenTypes
,
tagTokenTypes
from
.
constants
import
replacementCharacters
from
.
inputstream
import
HTMLInputStream
from
.
trie
import
Trie
entitiesTrie
=
Trie
(
entities
)
class
HTMLTokenizer
(
object
):
""" This class takes care of tokenizing HTML.
* self.currentToken
Holds the token that is currently being processed.
* self.state
Holds a reference to the method to be invoked... XXX
* self.stream
Points to HTMLInputStream object.
"""
def
__init__
(
self
,
stream
,
encoding
=
None
,
parseMeta
=
True
,
useChardet
=
True
,
lowercaseElementName
=
True
,
lowercaseAttrName
=
True
,
parser
=
None
):
self
.
stream
=
HTMLInputStream
(
stream
,
encoding
,
parseMeta
,
useChardet
)
self
.
parser
=
parser
# Perform case conversions?
self
.
lowercaseElementName
=
lowercaseElementName
self
.
lowercaseAttrName
=
lowercaseAttrName
# Setup the initial tokenizer state
self
.
escapeFlag
=
False
self
.
lastFourChars
=
[]
self
.
state
=
self
.
dataState
self
.
escape
=
False
# The current token being created
self
.
currentToken
=
None
super
(
HTMLTokenizer
,
self
).
__init__
()
def
__iter__
(
self
):
""" This is where the magic happens.
We do our usually processing through the states and when we have a token
to return we yield the token which pauses processing until the next token
is requested.
"""
self
.
tokenQueue
=
deque
([])
# Start processing. When EOF is reached self.state will return False
# instead of True and the loop will terminate.
while
self
.
state
():
while
self
.
stream
.
errors
:
yield
{
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
self
.
stream
.
errors
.
pop
(
0
)}
while
self
.
tokenQueue
:
yield
self
.
tokenQueue
.
popleft
()
def
consumeNumberEntity
(
self
,
isHex
):
"""This function returns either U+FFFD or the character based on the
decimal or hexadecimal representation. It also discards ";" if present.
If not present self.tokenQueue.append({"type": tokenTypes["ParseError"]}) is invoked.
"""
allowed
=
digits
radix
=
10
if
isHex
:
allowed
=
hexDigits
radix
=
16
charStack
=
[]
# Consume all the characters that are in range while making sure we
# don't hit an EOF.
c
=
self
.
stream
.
char
()
while
c
in
allowed
and
c
is
not
EOF
:
charStack
.
append
(
c
)
c
=
self
.
stream
.
char
()
# Convert the set of characters consumed to an int.
charAsInt
=
int
(
""
.
join
(
charStack
),
radix
)
# Certain characters get replaced with others
if
charAsInt
in
replacementCharacters
:
char
=
replacementCharacters
[
charAsInt
]
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"illegal-codepoint-for-numeric-entity"
,
"datavars"
: {
"charAsInt"
:
charAsInt
}})
elif
((
0xD800
<=
charAsInt
<=
0xDFFF
)
or
(
charAsInt
>
0x10FFFF
)):
char
=
"
\uFFFD
"
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"illegal-codepoint-for-numeric-entity"
,
"datavars"
: {
"charAsInt"
:
charAsInt
}})
else
:
# Should speed up this check somehow (e.g. move the set to a constant)
if
((
0x0001
<=
charAsInt
<=
0x0008
)
or
(
0x000E
<=
charAsInt
<=
0x001F
)
or
(
0x007F
<=
charAsInt
<=
0x009F
)
or
(
0xFDD0
<=
charAsInt
<=
0xFDEF
)
or
charAsInt
in
frozenset
([
0x000B
,
0xFFFE
,
0xFFFF
,
0x1FFFE
,
0x1FFFF
,
0x2FFFE
,
0x2FFFF
,
0x3FFFE
,
0x3FFFF
,
0x4FFFE
,
0x4FFFF
,
0x5FFFE
,
0x5FFFF
,
0x6FFFE
,
0x6FFFF
,
0x7FFFE
,
0x7FFFF
,
0x8FFFE
,
0x8FFFF
,
0x9FFFE
,
0x9FFFF
,
0xAFFFE
,
0xAFFFF
,
0xBFFFE
,
0xBFFFF
,
0xCFFFE
,
0xCFFFF
,
0xDFFFE
,
0xDFFFF
,
0xEFFFE
,
0xEFFFF
,
0xFFFFE
,
0xFFFFF
,
0x10FFFE
,
0x10FFFF
])):
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"illegal-codepoint-for-numeric-entity"
,
"datavars"
: {
"charAsInt"
:
charAsInt
}})
try
:
# Try/except needed as UCS-2 Python builds' unichar only works
# within the BMP.
char
=
chr
(
charAsInt
)
except
ValueError
:
v
=
charAsInt
-
0x10000
char
=
chr
(
0xD800
|
(
v
>>
10
))
+
chr
(
0xDC00
|
(
v
&
0x3FF
))
# Discard the ; if present. Otherwise, put it back on the queue and
# invoke parseError on parser.
if
c
!=
";"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"numeric-entity-without-semicolon"
})
self
.
stream
.
unget
(
c
)
return
char
def
consumeEntity
(
self
,
allowedChar
=
None
,
fromAttribute
=
False
):
# Initialise to the default output for when no entity is matched
output
=
"&"
charStack
=
[
self
.
stream
.
char
()]
if
(
charStack
[
0
]
in
spaceCharacters
or
charStack
[
0
]
in
(
EOF
,
"<"
,
"&"
)
or
(
allowedChar
is
not
None
and
allowedChar
==
charStack
[
0
])):
self
.
stream
.
unget
(
charStack
[
0
])
elif
charStack
[
0
]
==
"#"
:
# Read the next character to see if it's hex or decimal
hex
=
False
charStack
.
append
(
self
.
stream
.
char
())
if
charStack
[
-
1
]
in
(
"x"
,
"X"
):
hex
=
True
charStack
.
append
(
self
.
stream
.
char
())
# charStack[-1] should be the first digit
if
(
hex
and
charStack
[
-
1
]
in
hexDigits
) \
or
(
not
hex
and
charStack
[
-
1
]
in
digits
):
# At least one digit found, so consume the whole number
self
.
stream
.
unget
(
charStack
[
-
1
])
output
=
self
.
consumeNumberEntity
(
hex
)
else
:
# No digits found
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-numeric-entity"
})
self
.
stream
.
unget
(
charStack
.
pop
())
output
=
"&"
+
""
.
join
(
charStack
)
else
:
# At this point in the process might have named entity. Entities
# are stored in the global variable "entities".
#
# Consume characters and compare to these to a substring of the
# entity names in the list until the substring no longer matches.
while
(
charStack
[
-
1
]
is
not
EOF
):
if
not
entitiesTrie
.
has_keys_with_prefix
(
""
.
join
(
charStack
)):
break
charStack
.
append
(
self
.
stream
.
char
())
# At this point we have a string that starts with some characters
# that may match an entity
# Try to find the longest entity the string will match to take care
# of ¬i for instance.
try
:
entityName
=
entitiesTrie
.
longest_prefix
(
""
.
join
(
charStack
[:
-
1
]))
entityLength
=
len
(
entityName
)
except
KeyError
:
entityName
=
None
if
entityName
is
not
None
:
if
entityName
[
-
1
]
!=
";"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"named-entity-without-semicolon"
})
if
(
entityName
[
-
1
]
!=
";"
and
fromAttribute
and
(
charStack
[
entityLength
]
in
asciiLetters
or
charStack
[
entityLength
]
in
digits
or
charStack
[
entityLength
]
==
"="
)):
self
.
stream
.
unget
(
charStack
.
pop
())
output
=
"&"
+
""
.
join
(
charStack
)
else
:
output
=
entities
[
entityName
]
self
.
stream
.
unget
(
charStack
.
pop
())
output
+=
""
.
join
(
charStack
[
entityLength
:])
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-named-entity"
})
self
.
stream
.
unget
(
charStack
.
pop
())
output
=
"&"
+
""
.
join
(
charStack
)
if
fromAttribute
:
self
.
currentToken
[
"data"
][
-
1
][
1
]
+=
output
else
:
if
output
in
spaceCharacters
:
tokenType
=
"SpaceCharacters"
else
:
tokenType
=
"Characters"
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
tokenType
],
"data"
:
output
})
def
processEntityInAttribute
(
self
,
allowedChar
):
"""This method replaces the need for "entityInAttributeValueState".
"""
self
.
consumeEntity
(
allowedChar
=
allowedChar
,
fromAttribute
=
True
)
def
emitCurrentToken
(
self
):
"""This method is a generic handler for emitting the tags. It also sets
the state to "data" because that's what's needed after a token has been
emitted.
"""
token
=
self
.
currentToken
# Add token to the queue to be yielded
if
(
token
[
"type"
]
in
tagTokenTypes
):
if
self
.
lowercaseElementName
:
token
[
"name"
]
=
token
[
"name"
].
translate
(
asciiUpper2Lower
)
if
token
[
"type"
]
==
tokenTypes
[
"EndTag"
]:
if
token
[
"data"
]:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"attributes-in-end-tag"
})
if
token
[
"selfClosing"
]:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"self-closing-flag-on-end-tag"
})
self
.
tokenQueue
.
append
(
token
)
self
.
state
=
self
.
dataState
# Below are the various tokenizer states worked out.
def
dataState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"&"
:
self
.
state
=
self
.
entityDataState
elif
data
==
"<"
:
self
.
state
=
self
.
tagOpenState
elif
data
==
"
\u0000
"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-codepoint"
})
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"
\u0000
"
})
elif
data
is
EOF
:
# Tokenization ends.
return
False
elif
data
in
spaceCharacters
:
# Directly after emitting a token you switch back to the "data
# state". At that point spaceCharacters are important so they are
# emitted separately.
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"SpaceCharacters"
],
"data"
:
data
+
self
.
stream
.
charsUntil
(
spaceCharacters
,
True
)})
# No need to update lastFourChars here, since the first space will
# have already been appended to lastFourChars and will have broken
# any <!-- or --> sequences
else
:
chars
=
self
.
stream
.
charsUntil
((
"&"
,
"<"
,
"
\u0000
"
))
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
+
chars
})
return
True
def
entityDataState
(
self
):
self
.
consumeEntity
()
self
.
state
=
self
.
dataState
return
True
def
rcdataState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"&"
:
self
.
state
=
self
.
characterReferenceInRcdata
elif
data
==
"<"
:
self
.
state
=
self
.
rcdataLessThanSignState
elif
data
==
EOF
:
# Tokenization ends.
return
False
elif
data
==
"
\u0000
"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-codepoint"
})
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"
\uFFFD
"
})
elif
data
in
spaceCharacters
:
# Directly after emitting a token you switch back to the "data
# state". At that point spaceCharacters are important so they are
# emitted separately.
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"SpaceCharacters"
],
"data"
:
data
+
self
.
stream
.
charsUntil
(
spaceCharacters
,
True
)})
# No need to update lastFourChars here, since the first space will
# have already been appended to lastFourChars and will have broken
# any <!-- or --> sequences
else
:
chars
=
self
.
stream
.
charsUntil
((
"&"
,
"<"
))
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
+
chars
})
return
True
def
characterReferenceInRcdata
(
self
):
self
.
consumeEntity
()
self
.
state
=
self
.
rcdataState
return
True
def
rawtextState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"<"
:
self
.
state
=
self
.
rawtextLessThanSignState
elif
data
==
"
\u0000
"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-codepoint"
})
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"
\uFFFD
"
})
elif
data
==
EOF
:
# Tokenization ends.
return
False
else
:
chars
=
self
.
stream
.
charsUntil
((
"<"
,
"
\u0000
"
))
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
+
chars
})
return
True
def
scriptDataState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"<"
:
self
.
state
=
self
.
scriptDataLessThanSignState
elif
data
==
"
\u0000
"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-codepoint"
})
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"
\uFFFD
"
})
elif
data
==
EOF
:
# Tokenization ends.
return
False
else
:
chars
=
self
.
stream
.
charsUntil
((
"<"
,
"
\u0000
"
))
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
+
chars
})
return
True
def
plaintextState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
EOF
:
# Tokenization ends.
return
False
elif
data
==
"
\u0000
"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-codepoint"
})
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"
\uFFFD
"
})
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
+
self
.
stream
.
charsUntil
(
"
\u0000
"
)})
return
True
def
tagOpenState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"!"
:
self
.
state
=
self
.
markupDeclarationOpenState
elif
data
==
"/"
:
self
.
state
=
self
.
closeTagOpenState
elif
data
in
asciiLetters
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"StartTag"
],
"name"
:
data
,
"data"
: [],
"selfClosing"
:
False
,
"selfClosingAcknowledged"
:
False
}
self
.
state
=
self
.
tagNameState
elif
data
==
">"
:
# XXX In theory it could be something besides a tag name. But
# do we really care?
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-tag-name-but-got-right-bracket"
})
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"<>"
})
self
.
state
=
self
.
dataState
elif
data
==
"?"
:
# XXX In theory it could be something besides a tag name. But
# do we really care?
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-tag-name-but-got-question-mark"
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
bogusCommentState
else
:
# XXX
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-tag-name"
})
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"<"
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
dataState
return
True
def
closeTagOpenState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
asciiLetters
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"EndTag"
],
"name"
:
data
,
"data"
: [],
"selfClosing"
:
False
}
self
.
state
=
self
.
tagNameState
elif
data
==
">"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-closing-tag-but-got-right-bracket"
})
self
.
state
=
self
.
dataState
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-closing-tag-but-got-eof"
})
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"</"
})
self
.
state
=
self
.
dataState
else
:
# XXX data can be _'_...
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-closing-tag-but-got-char"
,
"datavars"
: {
"data"
:
data
}})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
bogusCommentState
return
True
def
tagNameState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
:
self
.
state
=
self
.
beforeAttributeNameState
elif
data
==
">"
:
self
.
emitCurrentToken
()
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-tag-name"
})
self
.
state
=
self
.
dataState
elif
data
==
"/"
:
self
.
state
=
self
.
selfClosingStartTagState
elif
data
==
"
\u0000
"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-codepoint"
})
self
.
currentToken
[
"name"
]
+=
"
\uFFFD
"
else
:
self
.
currentToken
[
"name"
]
+=
data
# (Don't use charsUntil here, because tag names are
# very short and it's faster to not do anything fancy)
return
True
def
rcdataLessThanSignState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"/"
:
self
.
temporaryBuffer
=
""
self
.
state
=
self
.
rcdataEndTagOpenState
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"<"
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
rcdataState
return
True
def
rcdataEndTagOpenState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
asciiLetters
:
self
.
temporaryBuffer
+=
data
self
.
state
=
self
.
rcdataEndTagNameState
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"</"
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
rcdataState
return
True
def
rcdataEndTagNameState
(
self
):
appropriate
=
self
.
currentToken
and
self
.
currentToken
[
"name"
].
lower
()
==
self
.
temporaryBuffer
.
lower
()
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
and
appropriate
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"EndTag"
],
"name"
:
self
.
temporaryBuffer
,
"data"
: [],
"selfClosing"
:
False
}
self
.
state
=
self
.
beforeAttributeNameState
elif
data
==
"/"
and
appropriate
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"EndTag"
],
"name"
:
self
.
temporaryBuffer
,
"data"
: [],
"selfClosing"
:
False
}
self
.
state
=
self
.
selfClosingStartTagState
elif
data
==
">"
and
appropriate
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"EndTag"
],
"name"
:
self
.
temporaryBuffer
,
"data"
: [],
"selfClosing"
:
False
}
self
.
emitCurrentToken
()
self
.
state
=
self
.
dataState
elif
data
in
asciiLetters
:
self
.
temporaryBuffer
+=
data
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"</"
+
self
.
temporaryBuffer
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
rcdataState
return
True
def
rawtextLessThanSignState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"/"
:
self
.
temporaryBuffer
=
""
self
.
state
=
self
.
rawtextEndTagOpenState
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"<"
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
rawtextState
return
True
def
rawtextEndTagOpenState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
asciiLetters
:
self
.
temporaryBuffer
+=
data
self
.
state
=
self
.
rawtextEndTagNameState
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"</"
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
rawtextState
return
True
def
rawtextEndTagNameState
(
self
):
appropriate
=
self
.
currentToken
and
self
.
currentToken
[
"name"
].
lower
()
==
self
.
temporaryBuffer
.
lower
()
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
and
appropriate
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"EndTag"
],
"name"
:
self
.
temporaryBuffer
,
"data"
: [],
"selfClosing"
:
False
}
self
.
state
=
self
.
beforeAttributeNameState
elif
data
==
"/"
and
appropriate
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"EndTag"
],
"name"
:
self
.
temporaryBuffer
,
"data"
: [],
"selfClosing"
:
False
}
self
.
state
=
self
.
selfClosingStartTagState
elif
data
==
">"
and
appropriate
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"EndTag"
],
"name"
:
self
.
temporaryBuffer
,
"data"
: [],
"selfClosing"
:
False
}
self
.
emitCurrentToken
()
self
.
state
=
self
.
dataState
elif
data
in
asciiLetters
:
self
.
temporaryBuffer
+=
data
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"</"
+
self
.
temporaryBuffer
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
rawtextState
return
True
def
scriptDataLessThanSignState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"/"
:
self
.
temporaryBuffer
=
""
self
.
state
=
self
.
scriptDataEndTagOpenState
elif
data
==
"!"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"<!"
})
self
.
state
=
self
.
scriptDataEscapeStartState
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"<"
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
scriptDataState
return
True
def
scriptDataEndTagOpenState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
asciiLetters
:
self
.
temporaryBuffer
+=
data
self
.
state
=
self
.
scriptDataEndTagNameState
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"</"
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
scriptDataState
return
True
def
scriptDataEndTagNameState
(
self
):
appropriate
=
self
.
currentToken
and
self
.
currentToken
[
"name"
].
lower
()
==
self
.
temporaryBuffer
.
lower
()
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
and
appropriate
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"EndTag"
],
"name"
:
self
.
temporaryBuffer
,
"data"
: [],
"selfClosing"
:
False
}
self
.
state
=
self
.
beforeAttributeNameState
elif
data
==
"/"
and
appropriate
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"EndTag"
],
"name"
:
self
.
temporaryBuffer
,
"data"
: [],
"selfClosing"
:
False
}
self
.
state
=
self
.
selfClosingStartTagState
elif
data
==
">"
and
appropriate
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"EndTag"
],
"name"
:
self
.
temporaryBuffer
,
"data"
: [],
"selfClosing"
:
False
}
self
.
emitCurrentToken
()
self
.
state
=
self
.
dataState
elif
data
in
asciiLetters
:
self
.
temporaryBuffer
+=
data
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"</"
+
self
.
temporaryBuffer
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
scriptDataState
return
True
def
scriptDataEscapeStartState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"-"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"-"
})
self
.
state
=
self
.
scriptDataEscapeStartDashState
else
:
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
scriptDataState
return
True
def
scriptDataEscapeStartDashState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"-"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"-"
})
self
.
state
=
self
.
scriptDataEscapedDashDashState
else
:
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
scriptDataState
return
True
def
scriptDataEscapedState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"-"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"-"
})
self
.
state
=
self
.
scriptDataEscapedDashState
elif
data
==
"<"
:
self
.
state
=
self
.
scriptDataEscapedLessThanSignState
elif
data
==
"
\u0000
"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-codepoint"
})
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"
\uFFFD
"
})
elif
data
==
EOF
:
self
.
state
=
self
.
dataState
else
:
chars
=
self
.
stream
.
charsUntil
((
"<"
,
"-"
,
"
\u0000
"
))
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
+
chars
})
return
True
def
scriptDataEscapedDashState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"-"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"-"
})
self
.
state
=
self
.
scriptDataEscapedDashDashState
elif
data
==
"<"
:
self
.
state
=
self
.
scriptDataEscapedLessThanSignState
elif
data
==
"
\u0000
"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-codepoint"
})
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"
\uFFFD
"
})
self
.
state
=
self
.
scriptDataEscapedState
elif
data
==
EOF
:
self
.
state
=
self
.
dataState
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
})
self
.
state
=
self
.
scriptDataEscapedState
return
True
def
scriptDataEscapedDashDashState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"-"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"-"
})
elif
data
==
"<"
:
self
.
state
=
self
.
scriptDataEscapedLessThanSignState
elif
data
==
">"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
">"
})
self
.
state
=
self
.
scriptDataState
elif
data
==
"
\u0000
"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-codepoint"
})
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"
\uFFFD
"
})
self
.
state
=
self
.
scriptDataEscapedState
elif
data
==
EOF
:
self
.
state
=
self
.
dataState
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
})
self
.
state
=
self
.
scriptDataEscapedState
return
True
def
scriptDataEscapedLessThanSignState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"/"
:
self
.
temporaryBuffer
=
""
self
.
state
=
self
.
scriptDataEscapedEndTagOpenState
elif
data
in
asciiLetters
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"<"
+
data
})
self
.
temporaryBuffer
=
data
self
.
state
=
self
.
scriptDataDoubleEscapeStartState
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"<"
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
scriptDataEscapedState
return
True
def
scriptDataEscapedEndTagOpenState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
asciiLetters
:
self
.
temporaryBuffer
=
data
self
.
state
=
self
.
scriptDataEscapedEndTagNameState
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"</"
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
scriptDataEscapedState
return
True
def
scriptDataEscapedEndTagNameState
(
self
):
appropriate
=
self
.
currentToken
and
self
.
currentToken
[
"name"
].
lower
()
==
self
.
temporaryBuffer
.
lower
()
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
and
appropriate
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"EndTag"
],
"name"
:
self
.
temporaryBuffer
,
"data"
: [],
"selfClosing"
:
False
}
self
.
state
=
self
.
beforeAttributeNameState
elif
data
==
"/"
and
appropriate
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"EndTag"
],
"name"
:
self
.
temporaryBuffer
,
"data"
: [],
"selfClosing"
:
False
}
self
.
state
=
self
.
selfClosingStartTagState
elif
data
==
">"
and
appropriate
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"EndTag"
],
"name"
:
self
.
temporaryBuffer
,
"data"
: [],
"selfClosing"
:
False
}
self
.
emitCurrentToken
()
self
.
state
=
self
.
dataState
elif
data
in
asciiLetters
:
self
.
temporaryBuffer
+=
data
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"</"
+
self
.
temporaryBuffer
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
scriptDataEscapedState
return
True
def
scriptDataDoubleEscapeStartState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
(
spaceCharacters
|
frozenset
((
"/"
,
">"
))):
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
})
if
self
.
temporaryBuffer
.
lower
()
==
"script"
:
self
.
state
=
self
.
scriptDataDoubleEscapedState
else
:
self
.
state
=
self
.
scriptDataEscapedState
elif
data
in
asciiLetters
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
})
self
.
temporaryBuffer
+=
data
else
:
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
scriptDataEscapedState
return
True
def
scriptDataDoubleEscapedState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"-"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"-"
})
self
.
state
=
self
.
scriptDataDoubleEscapedDashState
elif
data
==
"<"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"<"
})
self
.
state
=
self
.
scriptDataDoubleEscapedLessThanSignState
elif
data
==
"
\u0000
"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-codepoint"
})
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"
\uFFFD
"
})
elif
data
==
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-script-in-script"
})
self
.
state
=
self
.
dataState
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
})
return
True
def
scriptDataDoubleEscapedDashState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"-"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"-"
})
self
.
state
=
self
.
scriptDataDoubleEscapedDashDashState
elif
data
==
"<"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"<"
})
self
.
state
=
self
.
scriptDataDoubleEscapedLessThanSignState
elif
data
==
"
\u0000
"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-codepoint"
})
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"
\uFFFD
"
})
self
.
state
=
self
.
scriptDataDoubleEscapedState
elif
data
==
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-script-in-script"
})
self
.
state
=
self
.
dataState
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
})
self
.
state
=
self
.
scriptDataDoubleEscapedState
return
True
def
scriptDataDoubleEscapedDashDashState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"-"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"-"
})
elif
data
==
"<"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"<"
})
self
.
state
=
self
.
scriptDataDoubleEscapedLessThanSignState
elif
data
==
">"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
">"
})
self
.
state
=
self
.
scriptDataState
elif
data
==
"
\u0000
"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-codepoint"
})
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"
\uFFFD
"
})
self
.
state
=
self
.
scriptDataDoubleEscapedState
elif
data
==
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-script-in-script"
})
self
.
state
=
self
.
dataState
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
})
self
.
state
=
self
.
scriptDataDoubleEscapedState
return
True
def
scriptDataDoubleEscapedLessThanSignState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"/"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"/"
})
self
.
temporaryBuffer
=
""
self
.
state
=
self
.
scriptDataDoubleEscapeEndState
else
:
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
scriptDataDoubleEscapedState
return
True
def
scriptDataDoubleEscapeEndState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
(
spaceCharacters
|
frozenset
((
"/"
,
">"
))):
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
})
if
self
.
temporaryBuffer
.
lower
()
==
"script"
:
self
.
state
=
self
.
scriptDataEscapedState
else
:
self
.
state
=
self
.
scriptDataDoubleEscapedState
elif
data
in
asciiLetters
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
})
self
.
temporaryBuffer
+=
data
else
:
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
scriptDataDoubleEscapedState
return
True
def
beforeAttributeNameState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
:
self
.
stream
.
charsUntil
(
spaceCharacters
,
True
)
elif
data
in
asciiLetters
:
self
.
currentToken
[
"data"
].
append
([
data
,
""
])
self
.
state
=
self
.
attributeNameState
elif
data
==
">"
:
self
.
emitCurrentToken
()
elif
data
==
"/"
:
self
.
state
=
self
.
selfClosingStartTagState
elif
data
in
(
"'"
,
'"'
,
"="
,
"<"
):
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-character-in-attribute-name"
})
self
.
currentToken
[
"data"
].
append
([
data
,
""
])
self
.
state
=
self
.
attributeNameState
elif
data
==
"
\u0000
"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-codepoint"
})
self
.
currentToken
[
"data"
].
append
([
"
\uFFFD
"
,
""
])
self
.
state
=
self
.
attributeNameState
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-attribute-name-but-got-eof"
})
self
.
state
=
self
.
dataState
else
:
self
.
currentToken
[
"data"
].
append
([
data
,
""
])
self
.
state
=
self
.
attributeNameState
return
True
def
attributeNameState
(
self
):
data
=
self
.
stream
.
char
()
leavingThisState
=
True
emitToken
=
False
if
data
==
"="
:
self
.
state
=
self
.
beforeAttributeValueState
elif
data
in
asciiLetters
:
self
.
currentToken
[
"data"
][
-
1
][
0
]
+=
data
+
\
self
.
stream
.
charsUntil
(
asciiLetters
,
True
)
leavingThisState
=
False
elif
data
==
">"
:
# XXX If we emit here the attributes are converted to a dict
# without being checked and when the code below runs we error
# because data is a dict not a list
emitToken
=
True
elif
data
in
spaceCharacters
:
self
.
state
=
self
.
afterAttributeNameState
elif
data
==
"/"
:
self
.
state
=
self
.
selfClosingStartTagState
elif
data
==
"
\u0000
"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-codepoint"
})
self
.
currentToken
[
"data"
][
-
1
][
0
]
+=
"
\uFFFD
"
leavingThisState
=
False
elif
data
in
(
"'"
,
'"'
,
"<"
):
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-character-in-attribute-name"
})
self
.
currentToken
[
"data"
][
-
1
][
0
]
+=
data
leavingThisState
=
False
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-attribute-name"
})
self
.
state
=
self
.
dataState
else
:
self
.
currentToken
[
"data"
][
-
1
][
0
]
+=
data
leavingThisState
=
False
if
leavingThisState
:
# Attributes are not dropped at this stage. That happens when the
# start tag token is emitted so values can still be safely appended
# to attributes, but we do want to report the parse error in time.
if
self
.
lowercaseAttrName
:
self
.
currentToken
[
"data"
][
-
1
][
0
]
=
(
self
.
currentToken
[
"data"
][
-
1
][
0
].
translate
(
asciiUpper2Lower
))
for
name
,
value
in
self
.
currentToken
[
"data"
][:
-
1
]:
if
self
.
currentToken
[
"data"
][
-
1
][
0
]
==
name
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"duplicate-attribute"
})
break
# XXX Fix for above XXX
if
emitToken
:
self
.
emitCurrentToken
()
return
True
def
afterAttributeNameState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
:
self
.
stream
.
charsUntil
(
spaceCharacters
,
True
)
elif
data
==
"="
:
self
.
state
=
self
.
beforeAttributeValueState
elif
data
==
">"
:
self
.
emitCurrentToken
()
elif
data
in
asciiLetters
:
self
.
currentToken
[
"data"
].
append
([
data
,
""
])
self
.
state
=
self
.
attributeNameState
elif
data
==
"/"
:
self
.
state
=
self
.
selfClosingStartTagState
elif
data
==
"
\u0000
"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-codepoint"
})
self
.
currentToken
[
"data"
].
append
([
"
\uFFFD
"
,
""
])
self
.
state
=
self
.
attributeNameState
elif
data
in
(
"'"
,
'"'
,
"<"
):
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-character-after-attribute-name"
})
self
.
currentToken
[
"data"
].
append
([
data
,
""
])
self
.
state
=
self
.
attributeNameState
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-end-of-tag-but-got-eof"
})
self
.
state
=
self
.
dataState
else
:
self
.
currentToken
[
"data"
].
append
([
data
,
""
])
self
.
state
=
self
.
attributeNameState
return
True
def
beforeAttributeValueState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
:
self
.
stream
.
charsUntil
(
spaceCharacters
,
True
)
elif
data
==
"
\"
"
:
self
.
state
=
self
.
attributeValueDoubleQuotedState
elif
data
==
"&"
:
self
.
state
=
self
.
attributeValueUnQuotedState
self
.
stream
.
unget
(
data
)
elif
data
==
"'"
:
self
.
state
=
self
.
attributeValueSingleQuotedState
elif
data
==
">"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-attribute-value-but-got-right-bracket"
})
self
.
emitCurrentToken
()
elif
data
==
"
\u0000
"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-codepoint"
})
self
.
currentToken
[
"data"
][
-
1
][
1
]
+=
"
\uFFFD
"
self
.
state
=
self
.
attributeValueUnQuotedState
elif
data
in
(
"="
,
"<"
,
"`"
):
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"equals-in-unquoted-attribute-value"
})
self
.
currentToken
[
"data"
][
-
1
][
1
]
+=
data
self
.
state
=
self
.
attributeValueUnQuotedState
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-attribute-value-but-got-eof"
})
self
.
state
=
self
.
dataState
else
:
self
.
currentToken
[
"data"
][
-
1
][
1
]
+=
data
self
.
state
=
self
.
attributeValueUnQuotedState
View remainder of file in raw view
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