| 1 | """A parser for XML, using the derived class as static DTD."""
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| 2 |
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| 3 | # Author: Sjoerd Mullender.
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| 4 |
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| 5 | import re
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| 6 | import string
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| 7 |
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| 8 | import warnings
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| 9 | warnings.warn("The xmllib module is obsolete. Use xml.sax instead.",
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| 10 | DeprecationWarning, 2)
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| 11 | del warnings
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| 12 |
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| 13 | version = '0.3'
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| 14 |
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| 15 | class Error(RuntimeError):
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| 16 | pass
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| 17 |
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| 18 | # Regular expressions used for parsing
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| 19 |
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| 20 | _S = '[ \t\r\n]+' # white space
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| 21 | _opS = '[ \t\r\n]*' # optional white space
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| 22 | _Name = '[a-zA-Z_:][-a-zA-Z0-9._:]*' # valid XML name
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| 23 | _QStr = "(?:'[^']*'|\"[^\"]*\")" # quoted XML string
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| 24 | illegal = re.compile('[^\t\r\n -\176\240-\377]') # illegal chars in content
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| 25 | interesting = re.compile('[]&<]')
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| 26 |
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| 27 | amp = re.compile('&')
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| 28 | ref = re.compile('&(' + _Name + '|#[0-9]+|#x[0-9a-fA-F]+)[^-a-zA-Z0-9._:]')
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| 29 | entityref = re.compile('&(?P<name>' + _Name + ')[^-a-zA-Z0-9._:]')
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| 30 | charref = re.compile('&#(?P<char>[0-9]+[^0-9]|x[0-9a-fA-F]+[^0-9a-fA-F])')
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| 31 | space = re.compile(_S + '$')
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| 32 | newline = re.compile('\n')
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| 33 |
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| 34 | attrfind = re.compile(
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| 35 | _S + '(?P<name>' + _Name + ')'
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| 36 | '(' + _opS + '=' + _opS +
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| 37 | '(?P<value>'+_QStr+'|[-a-zA-Z0-9.:+*%?!\(\)_#=~]+))?')
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| 38 | starttagopen = re.compile('<' + _Name)
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| 39 | starttagend = re.compile(_opS + '(?P<slash>/?)>')
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| 40 | starttagmatch = re.compile('<(?P<tagname>'+_Name+')'
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| 41 | '(?P<attrs>(?:'+attrfind.pattern+')*)'+
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| 42 | starttagend.pattern)
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| 43 | endtagopen = re.compile('</')
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| 44 | endbracket = re.compile(_opS + '>')
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| 45 | endbracketfind = re.compile('(?:[^>\'"]|'+_QStr+')*>')
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| 46 | tagfind = re.compile(_Name)
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| 47 | cdataopen = re.compile(r'<!\[CDATA\[')
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| 48 | cdataclose = re.compile(r'\]\]>')
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| 49 | # this matches one of the following:
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| 50 | # SYSTEM SystemLiteral
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| 51 | # PUBLIC PubidLiteral SystemLiteral
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| 52 | _SystemLiteral = '(?P<%s>'+_QStr+')'
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| 53 | _PublicLiteral = '(?P<%s>"[-\'\(\)+,./:=?;!*#@$_%% \n\ra-zA-Z0-9]*"|' \
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| 54 | "'[-\(\)+,./:=?;!*#@$_%% \n\ra-zA-Z0-9]*')"
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| 55 | _ExternalId = '(?:SYSTEM|' \
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| 56 | 'PUBLIC'+_S+_PublicLiteral%'pubid'+ \
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| 57 | ')'+_S+_SystemLiteral%'syslit'
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| 58 | doctype = re.compile('<!DOCTYPE'+_S+'(?P<name>'+_Name+')'
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| 59 | '(?:'+_S+_ExternalId+')?'+_opS)
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| 60 | xmldecl = re.compile('<\?xml'+_S+
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| 61 | 'version'+_opS+'='+_opS+'(?P<version>'+_QStr+')'+
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| 62 | '(?:'+_S+'encoding'+_opS+'='+_opS+
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| 63 | "(?P<encoding>'[A-Za-z][-A-Za-z0-9._]*'|"
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| 64 | '"[A-Za-z][-A-Za-z0-9._]*"))?'
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| 65 | '(?:'+_S+'standalone'+_opS+'='+_opS+
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| 66 | '(?P<standalone>\'(?:yes|no)\'|"(?:yes|no)"))?'+
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| 67 | _opS+'\?>')
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| 68 | procopen = re.compile(r'<\?(?P<proc>' + _Name + ')' + _opS)
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| 69 | procclose = re.compile(_opS + r'\?>')
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| 70 | commentopen = re.compile('<!--')
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| 71 | commentclose = re.compile('-->')
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| 72 | doubledash = re.compile('--')
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| 73 | attrtrans = string.maketrans(' \r\n\t', ' ')
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| 74 |
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| 75 | # definitions for XML namespaces
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| 76 | _NCName = '[a-zA-Z_][-a-zA-Z0-9._]*' # XML Name, minus the ":"
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| 77 | ncname = re.compile(_NCName + '$')
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| 78 | qname = re.compile('(?:(?P<prefix>' + _NCName + '):)?' # optional prefix
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| 79 | '(?P<local>' + _NCName + ')$')
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| 80 |
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| 81 | xmlns = re.compile('xmlns(?::(?P<ncname>'+_NCName+'))?$')
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| 82 |
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| 83 | # XML parser base class -- find tags and call handler functions.
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| 84 | # Usage: p = XMLParser(); p.feed(data); ...; p.close().
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| 85 | # The dtd is defined by deriving a class which defines methods with
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| 86 | # special names to handle tags: start_foo and end_foo to handle <foo>
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| 87 | # and </foo>, respectively. The data between tags is passed to the
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| 88 | # parser by calling self.handle_data() with some data as argument (the
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| 89 | # data may be split up in arbitrary chunks).
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| 90 |
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| 91 | class XMLParser:
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| 92 | attributes = {} # default, to be overridden
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| 93 | elements = {} # default, to be overridden
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| 94 |
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| 95 | # parsing options, settable using keyword args in __init__
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| 96 | __accept_unquoted_attributes = 0
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| 97 | __accept_missing_endtag_name = 0
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| 98 | __map_case = 0
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| 99 | __accept_utf8 = 0
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| 100 | __translate_attribute_references = 1
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| 101 |
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| 102 | # Interface -- initialize and reset this instance
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| 103 | def __init__(self, **kw):
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| 104 | self.__fixed = 0
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| 105 | if 'accept_unquoted_attributes' in kw:
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| 106 | self.__accept_unquoted_attributes = kw['accept_unquoted_attributes']
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| 107 | if 'accept_missing_endtag_name' in kw:
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| 108 | self.__accept_missing_endtag_name = kw['accept_missing_endtag_name']
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| 109 | if 'map_case' in kw:
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| 110 | self.__map_case = kw['map_case']
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| 111 | if 'accept_utf8' in kw:
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| 112 | self.__accept_utf8 = kw['accept_utf8']
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| 113 | if 'translate_attribute_references' in kw:
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| 114 | self.__translate_attribute_references = kw['translate_attribute_references']
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| 115 | self.reset()
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| 116 |
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| 117 | def __fixelements(self):
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| 118 | self.__fixed = 1
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| 119 | self.elements = {}
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| 120 | self.__fixdict(self.__dict__)
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| 121 | self.__fixclass(self.__class__)
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| 122 |
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| 123 | def __fixclass(self, kl):
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| 124 | self.__fixdict(kl.__dict__)
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| 125 | for k in kl.__bases__:
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| 126 | self.__fixclass(k)
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| 127 |
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| 128 | def __fixdict(self, dict):
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| 129 | for key in dict.keys():
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| 130 | if key[:6] == 'start_':
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| 131 | tag = key[6:]
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| 132 | start, end = self.elements.get(tag, (None, None))
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| 133 | if start is None:
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| 134 | self.elements[tag] = getattr(self, key), end
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| 135 | elif key[:4] == 'end_':
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| 136 | tag = key[4:]
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| 137 | start, end = self.elements.get(tag, (None, None))
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| 138 | if end is None:
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| 139 | self.elements[tag] = start, getattr(self, key)
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| 140 |
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| 141 | # Interface -- reset this instance. Loses all unprocessed data
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| 142 | def reset(self):
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| 143 | self.rawdata = ''
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| 144 | self.stack = []
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| 145 | self.nomoretags = 0
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| 146 | self.literal = 0
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| 147 | self.lineno = 1
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| 148 | self.__at_start = 1
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| 149 | self.__seen_doctype = None
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| 150 | self.__seen_starttag = 0
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| 151 | self.__use_namespaces = 0
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| 152 | self.__namespaces = {'xml':None} # xml is implicitly declared
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| 153 | # backward compatibility hack: if elements not overridden,
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| 154 | # fill it in ourselves
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| 155 | if self.elements is XMLParser.elements:
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| 156 | self.__fixelements()
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| 157 |
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| 158 | # For derived classes only -- enter literal mode (CDATA) till EOF
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| 159 | def setnomoretags(self):
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| 160 | self.nomoretags = self.literal = 1
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| 161 |
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| 162 | # For derived classes only -- enter literal mode (CDATA)
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| 163 | def setliteral(self, *args):
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| 164 | self.literal = 1
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| 165 |
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| 166 | # Interface -- feed some data to the parser. Call this as
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| 167 | # often as you want, with as little or as much text as you
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| 168 | # want (may include '\n'). (This just saves the text, all the
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| 169 | # processing is done by goahead().)
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| 170 | def feed(self, data):
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| 171 | self.rawdata = self.rawdata + data
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| 172 | self.goahead(0)
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| 173 |
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| 174 | # Interface -- handle the remaining data
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| 175 | def close(self):
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| 176 | self.goahead(1)
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| 177 | if self.__fixed:
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| 178 | self.__fixed = 0
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| 179 | # remove self.elements so that we don't leak
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| 180 | del self.elements
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| 181 |
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| 182 | # Interface -- translate references
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| 183 | def translate_references(self, data, all = 1):
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| 184 | if not self.__translate_attribute_references:
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| 185 | return data
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| 186 | i = 0
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| 187 | while 1:
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| 188 | res = amp.search(data, i)
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| 189 | if res is None:
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| 190 | return data
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| 191 | s = res.start(0)
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| 192 | res = ref.match(data, s)
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| 193 | if res is None:
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| 194 | self.syntax_error("bogus `&'")
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| 195 | i = s+1
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| 196 | continue
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| 197 | i = res.end(0)
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| 198 | str = res.group(1)
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| 199 | rescan = 0
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| 200 | if str[0] == '#':
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| 201 | if str[1] == 'x':
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| 202 | str = chr(int(str[2:], 16))
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| 203 | else:
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| 204 | str = chr(int(str[1:]))
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| 205 | if data[i - 1] != ';':
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| 206 | self.syntax_error("`;' missing after char reference")
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| 207 | i = i-1
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| 208 | elif all:
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| 209 | if str in self.entitydefs:
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| 210 | str = self.entitydefs[str]
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| 211 | rescan = 1
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| 212 | elif data[i - 1] != ';':
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| 213 | self.syntax_error("bogus `&'")
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| 214 | i = s + 1 # just past the &
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| 215 | continue
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| 216 | else:
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| 217 | self.syntax_error("reference to unknown entity `&%s;'" % str)
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| 218 | str = '&' + str + ';'
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| 219 | elif data[i - 1] != ';':
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| 220 | self.syntax_error("bogus `&'")
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| 221 | i = s + 1 # just past the &
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| 222 | continue
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| 223 |
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| 224 | # when we get here, str contains the translated text and i points
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| 225 | # to the end of the string that is to be replaced
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| 226 | data = data[:s] + str + data[i:]
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| 227 | if rescan:
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| 228 | i = s
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| 229 | else:
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| 230 | i = s + len(str)
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| 231 |
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| 232 | # Interface - return a dictionary of all namespaces currently valid
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| 233 | def getnamespace(self):
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| 234 | nsdict = {}
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| 235 | for t, d, nst in self.stack:
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| 236 | nsdict.update(d)
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| 237 | return nsdict
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| 238 |
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| 239 | # Internal -- handle data as far as reasonable. May leave state
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| 240 | # and data to be processed by a subsequent call. If 'end' is
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| 241 | # true, force handling all data as if followed by EOF marker.
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| 242 | def goahead(self, end):
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| 243 | rawdata = self.rawdata
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| 244 | i = 0
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| 245 | n = len(rawdata)
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| 246 | while i < n:
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| 247 | if i > 0:
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| 248 | self.__at_start = 0
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| 249 | if self.nomoretags:
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| 250 | data = rawdata[i:n]
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| 251 | self.handle_data(data)
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| 252 | self.lineno = self.lineno + data.count('\n')
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| 253 | i = n
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| 254 | break
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| 255 | res = interesting.search(rawdata, i)
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| 256 | if res:
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| 257 | j = res.start(0)
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| 258 | else:
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| 259 | j = n
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| 260 | if i < j:
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| 261 | data = rawdata[i:j]
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| 262 | if self.__at_start and space.match(data) is None:
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| 263 | self.syntax_error('illegal data at start of file')
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| 264 | self.__at_start = 0
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| 265 | if not self.stack and space.match(data) is None:
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| 266 | self.syntax_error('data not in content')
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| 267 | if not self.__accept_utf8 and illegal.search(data):
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| 268 | self.syntax_error('illegal character in content')
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| 269 | self.handle_data(data)
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| 270 | self.lineno = self.lineno + data.count('\n')
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| 271 | i = j
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| 272 | if i == n: break
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| 273 | if rawdata[i] == '<':
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| 274 | if starttagopen.match(rawdata, i):
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| 275 | if self.literal:
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| 276 | data = rawdata[i]
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| 277 | self.handle_data(data)
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| 278 | self.lineno = self.lineno + data.count('\n')
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| 279 | i = i+1
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| 280 | continue
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| 281 | k = self.parse_starttag(i)
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| 282 | if k < 0: break
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| 283 | self.__seen_starttag = 1
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| 284 | self.lineno = self.lineno + rawdata[i:k].count('\n')
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| 285 | i = k
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| 286 | continue
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| 287 | if endtagopen.match(rawdata, i):
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| 288 | k = self.parse_endtag(i)
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| 289 | if k < 0: break
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| 290 | self.lineno = self.lineno + rawdata[i:k].count('\n')
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| 291 | i = k
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| 292 | continue
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| 293 | if commentopen.match(rawdata, i):
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| 294 | if self.literal:
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| 295 | data = rawdata[i]
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| 296 | self.handle_data(data)
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| 297 | self.lineno = self.lineno + data.count('\n')
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| 298 | i = i+1
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| 299 | continue
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| 300 | k = self.parse_comment(i)
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| 301 | if k < 0: break
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| 302 | self.lineno = self.lineno + rawdata[i:k].count('\n')
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| 303 | i = k
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| 304 | continue
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| 305 | if cdataopen.match(rawdata, i):
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| 306 | k = self.parse_cdata(i)
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| 307 | if k < 0: break
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| 308 | self.lineno = self.lineno + rawdata[i:k].count('\n')
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| 309 | i = k
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| 310 | continue
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| 311 | res = xmldecl.match(rawdata, i)
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| 312 | if res:
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| 313 | if not self.__at_start:
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| 314 | self.syntax_error("<?xml?> declaration not at start of document")
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| 315 | version, encoding, standalone = res.group('version',
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| 316 | 'encoding',
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| 317 | 'standalone')
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| 318 | if version[1:-1] != '1.0':
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| 319 | raise Error('only XML version 1.0 supported')
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| 320 | if encoding: encoding = encoding[1:-1]
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| 321 | if standalone: standalone = standalone[1:-1]
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| 322 | self.handle_xml(encoding, standalone)
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| 323 | i = res.end(0)
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| 324 | continue
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| 325 | res = procopen.match(rawdata, i)
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| 326 | if res:
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| 327 | k = self.parse_proc(i)
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| 328 | if k < 0: break
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| 329 | self.lineno = self.lineno + rawdata[i:k].count('\n')
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| 330 | i = k
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| 331 | continue
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| 332 | res = doctype.match(rawdata, i)
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| 333 | if res:
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| 334 | if self.literal:
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| 335 | data = rawdata[i]
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| 336 | self.handle_data(data)
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| 337 | self.lineno = self.lineno + data.count('\n')
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| 338 | i = i+1
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| 339 | continue
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| 340 | if self.__seen_doctype:
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| 341 | self.syntax_error('multiple DOCTYPE elements')
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| 342 | if self.__seen_starttag:
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| 343 | self.syntax_error('DOCTYPE not at beginning of document')
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| 344 | k = self.parse_doctype(res)
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| 345 | if k < 0: break
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| 346 | self.__seen_doctype = res.group('name')
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| 347 | if self.__map_case:
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| 348 | self.__seen_doctype = self.__seen_doctype.lower()
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| 349 | self.lineno = self.lineno + rawdata[i:k].count('\n')
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| 350 | i = k
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| 351 | continue
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| 352 | elif rawdata[i] == '&':
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| 353 | if self.literal:
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| 354 | data = rawdata[i]
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| 355 | self.handle_data(data)
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| 356 | i = i+1
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| 357 | continue
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| 358 | res = charref.match(rawdata, i)
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| 359 | if res is not None:
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| 360 | i = res.end(0)
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| 361 | if rawdata[i-1] != ';':
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| 362 | self.syntax_error("`;' missing in charref")
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| 363 | i = i-1
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| 364 | if not self.stack:
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| 365 | self.syntax_error('data not in content')
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| 366 | self.handle_charref(res.group('char')[:-1])
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| 367 | self.lineno = self.lineno + res.group(0).count('\n')
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| 368 | continue
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| 369 | res = entityref.match(rawdata, i)
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| 370 | if res is not None:
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| 371 | i = res.end(0)
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| 372 | if rawdata[i-1] != ';':
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| 373 | self.syntax_error("`;' missing in entityref")
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| 374 | i = i-1
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| 375 | name = res.group('name')
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| 376 | if self.__map_case:
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| 377 | name = name.lower()
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| 378 | if name in self.entitydefs:
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| 379 | self.rawdata = rawdata = rawdata[:res.start(0)] + self.entitydefs[name] + rawdata[i:]
|
|---|
| 380 | n = len(rawdata)
|
|---|
| 381 | i = res.start(0)
|
|---|
| 382 | else:
|
|---|
| 383 | self.unknown_entityref(name)
|
|---|
| 384 | self.lineno = self.lineno + res.group(0).count('\n')
|
|---|
| 385 | continue
|
|---|
| 386 | elif rawdata[i] == ']':
|
|---|
| 387 | if self.literal:
|
|---|
| 388 | data = rawdata[i]
|
|---|
| 389 | self.handle_data(data)
|
|---|
| 390 | i = i+1
|
|---|
| 391 | continue
|
|---|
| 392 | if n-i < 3:
|
|---|
| 393 | break
|
|---|
| 394 | if cdataclose.match(rawdata, i):
|
|---|
| 395 | self.syntax_error("bogus `]]>'")
|
|---|
| 396 | self.handle_data(rawdata[i])
|
|---|
| 397 | i = i+1
|
|---|
| 398 | continue
|
|---|
| 399 | else:
|
|---|
| 400 | raise Error('neither < nor & ??')
|
|---|
| 401 | # We get here only if incomplete matches but
|
|---|
| 402 | # nothing else
|
|---|
| 403 | break
|
|---|
| 404 | # end while
|
|---|
| 405 | if i > 0:
|
|---|
| 406 | self.__at_start = 0
|
|---|
| 407 | if end and i < n:
|
|---|
| 408 | data = rawdata[i]
|
|---|
| 409 | self.syntax_error("bogus `%s'" % data)
|
|---|
| 410 | if not self.__accept_utf8 and illegal.search(data):
|
|---|
| 411 | self.syntax_error('illegal character in content')
|
|---|
| 412 | self.handle_data(data)
|
|---|
| 413 | self.lineno = self.lineno + data.count('\n')
|
|---|
| 414 | self.rawdata = rawdata[i+1:]
|
|---|
| 415 | return self.goahead(end)
|
|---|
| 416 | self.rawdata = rawdata[i:]
|
|---|
| 417 | if end:
|
|---|
| 418 | if not self.__seen_starttag:
|
|---|
| 419 | self.syntax_error('no elements in file')
|
|---|
| 420 | if self.stack:
|
|---|
| 421 | self.syntax_error('missing end tags')
|
|---|
| 422 | while self.stack:
|
|---|
| 423 | self.finish_endtag(self.stack[-1][0])
|
|---|
| 424 |
|
|---|
| 425 | # Internal -- parse comment, return length or -1 if not terminated
|
|---|
| 426 | def parse_comment(self, i):
|
|---|
| 427 | rawdata = self.rawdata
|
|---|
| 428 | if rawdata[i:i+4] != '<!--':
|
|---|
| 429 | raise Error('unexpected call to handle_comment')
|
|---|
| 430 | res = commentclose.search(rawdata, i+4)
|
|---|
| 431 | if res is None:
|
|---|
| 432 | return -1
|
|---|
| 433 | if doubledash.search(rawdata, i+4, res.start(0)):
|
|---|
| 434 | self.syntax_error("`--' inside comment")
|
|---|
| 435 | if rawdata[res.start(0)-1] == '-':
|
|---|
| 436 | self.syntax_error('comment cannot end in three dashes')
|
|---|
| 437 | if not self.__accept_utf8 and \
|
|---|
| 438 | illegal.search(rawdata, i+4, res.start(0)):
|
|---|
| 439 | self.syntax_error('illegal character in comment')
|
|---|
| 440 | self.handle_comment(rawdata[i+4: res.start(0)])
|
|---|
| 441 | return res.end(0)
|
|---|
| 442 |
|
|---|
| 443 | # Internal -- handle DOCTYPE tag, return length or -1 if not terminated
|
|---|
| 444 | def parse_doctype(self, res):
|
|---|
| 445 | rawdata = self.rawdata
|
|---|
| 446 | n = len(rawdata)
|
|---|
| 447 | name = res.group('name')
|
|---|
| 448 | if self.__map_case:
|
|---|
| 449 | name = name.lower()
|
|---|
| 450 | pubid, syslit = res.group('pubid', 'syslit')
|
|---|
| 451 | if pubid is not None:
|
|---|
| 452 | pubid = pubid[1:-1] # remove quotes
|
|---|
| 453 | pubid = ' '.join(pubid.split()) # normalize
|
|---|
| 454 | if syslit is not None: syslit = syslit[1:-1] # remove quotes
|
|---|
| 455 | j = k = res.end(0)
|
|---|
| 456 | if k >= n:
|
|---|
| 457 | return -1
|
|---|
| 458 | if rawdata[k] == '[':
|
|---|
| 459 | level = 0
|
|---|
| 460 | k = k+1
|
|---|
| 461 | dq = sq = 0
|
|---|
| 462 | while k < n:
|
|---|
| 463 | c = rawdata[k]
|
|---|
| 464 | if not sq and c == '"':
|
|---|
| 465 | dq = not dq
|
|---|
| 466 | elif not dq and c == "'":
|
|---|
| 467 | sq = not sq
|
|---|
| 468 | elif sq or dq:
|
|---|
| 469 | pass
|
|---|
| 470 | elif level <= 0 and c == ']':
|
|---|
| 471 | res = endbracket.match(rawdata, k+1)
|
|---|
| 472 | if res is None:
|
|---|
| 473 | return -1
|
|---|
| 474 | self.handle_doctype(name, pubid, syslit, rawdata[j+1:k])
|
|---|
| 475 | return res.end(0)
|
|---|
| 476 | elif c == '<':
|
|---|
| 477 | level = level + 1
|
|---|
| 478 | elif c == '>':
|
|---|
| 479 | level = level - 1
|
|---|
| 480 | if level < 0:
|
|---|
| 481 | self.syntax_error("bogus `>' in DOCTYPE")
|
|---|
| 482 | k = k+1
|
|---|
| 483 | res = endbracketfind.match(rawdata, k)
|
|---|
| 484 | if res is None:
|
|---|
| 485 | return -1
|
|---|
| 486 | if endbracket.match(rawdata, k) is None:
|
|---|
| 487 | self.syntax_error('garbage in DOCTYPE')
|
|---|
| 488 | self.handle_doctype(name, pubid, syslit, None)
|
|---|
| 489 | return res.end(0)
|
|---|
| 490 |
|
|---|
| 491 | # Internal -- handle CDATA tag, return length or -1 if not terminated
|
|---|
| 492 | def parse_cdata(self, i):
|
|---|
| 493 | rawdata = self.rawdata
|
|---|
| 494 | if rawdata[i:i+9] != '<![CDATA[':
|
|---|
| 495 | raise Error('unexpected call to parse_cdata')
|
|---|
| 496 | res = cdataclose.search(rawdata, i+9)
|
|---|
| 497 | if res is None:
|
|---|
| 498 | return -1
|
|---|
| 499 | if not self.__accept_utf8 and \
|
|---|
| 500 | illegal.search(rawdata, i+9, res.start(0)):
|
|---|
| 501 | self.syntax_error('illegal character in CDATA')
|
|---|
| 502 | if not self.stack:
|
|---|
| 503 | self.syntax_error('CDATA not in content')
|
|---|
| 504 | self.handle_cdata(rawdata[i+9:res.start(0)])
|
|---|
| 505 | return res.end(0)
|
|---|
| 506 |
|
|---|
| 507 | __xml_namespace_attributes = {'ns':None, 'src':None, 'prefix':None}
|
|---|
| 508 | # Internal -- handle a processing instruction tag
|
|---|
| 509 | def parse_proc(self, i):
|
|---|
| 510 | rawdata = self.rawdata
|
|---|
| 511 | end = procclose.search(rawdata, i)
|
|---|
| 512 | if end is None:
|
|---|
| 513 | return -1
|
|---|
| 514 | j = end.start(0)
|
|---|
| 515 | if not self.__accept_utf8 and illegal.search(rawdata, i+2, j):
|
|---|
| 516 | self.syntax_error('illegal character in processing instruction')
|
|---|
| 517 | res = tagfind.match(rawdata, i+2)
|
|---|
| 518 | if res is None:
|
|---|
| 519 | raise Error('unexpected call to parse_proc')
|
|---|
| 520 | k = res.end(0)
|
|---|
| 521 | name = res.group(0)
|
|---|
| 522 | if self.__map_case:
|
|---|
| 523 | name = name.lower()
|
|---|
| 524 | if name == 'xml:namespace':
|
|---|
| 525 | self.syntax_error('old-fashioned namespace declaration')
|
|---|
| 526 | self.__use_namespaces = -1
|
|---|
| 527 | # namespace declaration
|
|---|
| 528 | # this must come after the <?xml?> declaration (if any)
|
|---|
| 529 | # and before the <!DOCTYPE> (if any).
|
|---|
| 530 | if self.__seen_doctype or self.__seen_starttag:
|
|---|
| 531 | self.syntax_error('xml:namespace declaration too late in document')
|
|---|
| 532 | attrdict, namespace, k = self.parse_attributes(name, k, j)
|
|---|
| 533 | if namespace:
|
|---|
| 534 | self.syntax_error('namespace declaration inside namespace declaration')
|
|---|
| 535 | for attrname in attrdict.keys():
|
|---|
| 536 | if not attrname in self.__xml_namespace_attributes:
|
|---|
| 537 | self.syntax_error("unknown attribute `%s' in xml:namespace tag" % attrname)
|
|---|
| 538 | if not 'ns' in attrdict or not 'prefix' in attrdict:
|
|---|
| 539 | self.syntax_error('xml:namespace without required attributes')
|
|---|
| 540 | prefix = attrdict.get('prefix')
|
|---|
| 541 | if ncname.match(prefix) is None:
|
|---|
| 542 | self.syntax_error('xml:namespace illegal prefix value')
|
|---|
| 543 | return end.end(0)
|
|---|
| 544 | if prefix in self.__namespaces:
|
|---|
| 545 | self.syntax_error('xml:namespace prefix not unique')
|
|---|
| 546 | self.__namespaces[prefix] = attrdict['ns']
|
|---|
| 547 | else:
|
|---|
| 548 | if name.lower() == 'xml':
|
|---|
| 549 | self.syntax_error('illegal processing instruction target name')
|
|---|
| 550 | self.handle_proc(name, rawdata[k:j])
|
|---|
| 551 | return end.end(0)
|
|---|
| 552 |
|
|---|
| 553 | # Internal -- parse attributes between i and j
|
|---|
| 554 | def parse_attributes(self, tag, i, j):
|
|---|
| 555 | rawdata = self.rawdata
|
|---|
| 556 | attrdict = {}
|
|---|
| 557 | namespace = {}
|
|---|
| 558 | while i < j:
|
|---|
| 559 | res = attrfind.match(rawdata, i)
|
|---|
| 560 | if res is None:
|
|---|
| 561 | break
|
|---|
| 562 | attrname, attrvalue = res.group('name', 'value')
|
|---|
| 563 | if self.__map_case:
|
|---|
| 564 | attrname = attrname.lower()
|
|---|
| 565 | i = res.end(0)
|
|---|
| 566 | if attrvalue is None:
|
|---|
| 567 | self.syntax_error("no value specified for attribute `%s'" % attrname)
|
|---|
| 568 | attrvalue = attrname
|
|---|
| 569 | elif attrvalue[:1] == "'" == attrvalue[-1:] or \
|
|---|
| 570 | attrvalue[:1] == '"' == attrvalue[-1:]:
|
|---|
| 571 | attrvalue = attrvalue[1:-1]
|
|---|
| 572 | elif not self.__accept_unquoted_attributes:
|
|---|
| 573 | self.syntax_error("attribute `%s' value not quoted" % attrname)
|
|---|
| 574 | res = xmlns.match(attrname)
|
|---|
| 575 | if res is not None:
|
|---|
| 576 | # namespace declaration
|
|---|
| 577 | ncname = res.group('ncname')
|
|---|
| 578 | namespace[ncname or ''] = attrvalue or None
|
|---|
| 579 | if not self.__use_namespaces:
|
|---|
| 580 | self.__use_namespaces = len(self.stack)+1
|
|---|
| 581 | continue
|
|---|
| 582 | if '<' in attrvalue:
|
|---|
| 583 | self.syntax_error("`<' illegal in attribute value")
|
|---|
| 584 | if attrname in attrdict:
|
|---|
| 585 | self.syntax_error("attribute `%s' specified twice" % attrname)
|
|---|
| 586 | attrvalue = attrvalue.translate(attrtrans)
|
|---|
| 587 | attrdict[attrname] = self.translate_references(attrvalue)
|
|---|
| 588 | return attrdict, namespace, i
|
|---|
| 589 |
|
|---|
| 590 | # Internal -- handle starttag, return length or -1 if not terminated
|
|---|
| 591 | def parse_starttag(self, i):
|
|---|
| 592 | rawdata = self.rawdata
|
|---|
| 593 | # i points to start of tag
|
|---|
| 594 | end = endbracketfind.match(rawdata, i+1)
|
|---|
| 595 | if end is None:
|
|---|
| 596 | return -1
|
|---|
| 597 | tag = starttagmatch.match(rawdata, i)
|
|---|
| 598 | if tag is None or tag.end(0) != end.end(0):
|
|---|
| 599 | self.syntax_error('garbage in starttag')
|
|---|
| 600 | return end.end(0)
|
|---|
| 601 | nstag = tagname = tag.group('tagname')
|
|---|
| 602 | if self.__map_case:
|
|---|
| 603 | nstag = tagname = nstag.lower()
|
|---|
| 604 | if not self.__seen_starttag and self.__seen_doctype and \
|
|---|
| 605 | tagname != self.__seen_doctype:
|
|---|
| 606 | self.syntax_error('starttag does not match DOCTYPE')
|
|---|
| 607 | if self.__seen_starttag and not self.stack:
|
|---|
| 608 | self.syntax_error('multiple elements on top level')
|
|---|
| 609 | k, j = tag.span('attrs')
|
|---|
| 610 | attrdict, nsdict, k = self.parse_attributes(tagname, k, j)
|
|---|
| 611 | self.stack.append((tagname, nsdict, nstag))
|
|---|
| 612 | if self.__use_namespaces:
|
|---|
| 613 | res = qname.match(tagname)
|
|---|
| 614 | else:
|
|---|
| 615 | res = None
|
|---|
| 616 | if res is not None:
|
|---|
| 617 | prefix, nstag = res.group('prefix', 'local')
|
|---|
| 618 | if prefix is None:
|
|---|
| 619 | prefix = ''
|
|---|
| 620 | ns = None
|
|---|
| 621 | for t, d, nst in self.stack:
|
|---|
| 622 | if prefix in d:
|
|---|
| 623 | ns = d[prefix]
|
|---|
| 624 | if ns is None and prefix != '':
|
|---|
| 625 | ns = self.__namespaces.get(prefix)
|
|---|
| 626 | if ns is not None:
|
|---|
| 627 | nstag = ns + ' ' + nstag
|
|---|
| 628 | elif prefix != '':
|
|---|
| 629 | nstag = prefix + ':' + nstag # undo split
|
|---|
| 630 | self.stack[-1] = tagname, nsdict, nstag
|
|---|
| 631 | # translate namespace of attributes
|
|---|
| 632 | attrnamemap = {} # map from new name to old name (used for error reporting)
|
|---|
| 633 | for key in attrdict.keys():
|
|---|
| 634 | attrnamemap[key] = key
|
|---|
| 635 | if self.__use_namespaces:
|
|---|
| 636 | nattrdict = {}
|
|---|
| 637 | for key, val in attrdict.items():
|
|---|
| 638 | okey = key
|
|---|
| 639 | res = qname.match(key)
|
|---|
| 640 | if res is not None:
|
|---|
| 641 | aprefix, key = res.group('prefix', 'local')
|
|---|
| 642 | if self.__map_case:
|
|---|
| 643 | key = key.lower()
|
|---|
| 644 | if aprefix is not None:
|
|---|
| 645 | ans = None
|
|---|
| 646 | for t, d, nst in self.stack:
|
|---|
| 647 | if aprefix in d:
|
|---|
| 648 | ans = d[aprefix]
|
|---|
| 649 | if ans is None:
|
|---|
| 650 | ans = self.__namespaces.get(aprefix)
|
|---|
| 651 | if ans is not None:
|
|---|
| 652 | key = ans + ' ' + key
|
|---|
| 653 | else:
|
|---|
| 654 | key = aprefix + ':' + key
|
|---|
| 655 | nattrdict[key] = val
|
|---|
| 656 | attrnamemap[key] = okey
|
|---|
| 657 | attrdict = nattrdict
|
|---|
| 658 | attributes = self.attributes.get(nstag)
|
|---|
| 659 | if attributes is not None:
|
|---|
| 660 | for key in attrdict.keys():
|
|---|
| 661 | if not key in attributes:
|
|---|
| 662 | self.syntax_error("unknown attribute `%s' in tag `%s'" % (attrnamemap[key], tagname))
|
|---|
| 663 | for key, val in attributes.items():
|
|---|
| 664 | if val is not None and not key in attrdict:
|
|---|
| 665 | attrdict[key] = val
|
|---|
| 666 | method = self.elements.get(nstag, (None, None))[0]
|
|---|
| 667 | self.finish_starttag(nstag, attrdict, method)
|
|---|
| 668 | if tag.group('slash') == '/':
|
|---|
| 669 | self.finish_endtag(tagname)
|
|---|
| 670 | return tag.end(0)
|
|---|
| 671 |
|
|---|
| 672 | # Internal -- parse endtag
|
|---|
| 673 | def parse_endtag(self, i):
|
|---|
| 674 | rawdata = self.rawdata
|
|---|
| 675 | end = endbracketfind.match(rawdata, i+1)
|
|---|
| 676 | if end is None:
|
|---|
| 677 | return -1
|
|---|
| 678 | res = tagfind.match(rawdata, i+2)
|
|---|
| 679 | if res is None:
|
|---|
| 680 | if self.literal:
|
|---|
| 681 | self.handle_data(rawdata[i])
|
|---|
| 682 | return i+1
|
|---|
| 683 | if not self.__accept_missing_endtag_name:
|
|---|
| 684 | self.syntax_error('no name specified in end tag')
|
|---|
| 685 | tag = self.stack[-1][0]
|
|---|
| 686 | k = i+2
|
|---|
| 687 | else:
|
|---|
| 688 | tag = res.group(0)
|
|---|
| 689 | if self.__map_case:
|
|---|
| 690 | tag = tag.lower()
|
|---|
| 691 | if self.literal:
|
|---|
| 692 | if not self.stack or tag != self.stack[-1][0]:
|
|---|
| 693 | self.handle_data(rawdata[i])
|
|---|
| 694 | return i+1
|
|---|
| 695 | k = res.end(0)
|
|---|
| 696 | if endbracket.match(rawdata, k) is None:
|
|---|
| 697 | self.syntax_error('garbage in end tag')
|
|---|
| 698 | self.finish_endtag(tag)
|
|---|
| 699 | return end.end(0)
|
|---|
| 700 |
|
|---|
| 701 | # Internal -- finish processing of start tag
|
|---|
| 702 | def finish_starttag(self, tagname, attrdict, method):
|
|---|
| 703 | if method is not None:
|
|---|
| 704 | self.handle_starttag(tagname, method, attrdict)
|
|---|
| 705 | else:
|
|---|
| 706 | self.unknown_starttag(tagname, attrdict)
|
|---|
| 707 |
|
|---|
| 708 | # Internal -- finish processing of end tag
|
|---|
| 709 | def finish_endtag(self, tag):
|
|---|
| 710 | self.literal = 0
|
|---|
| 711 | if not tag:
|
|---|
| 712 | self.syntax_error('name-less end tag')
|
|---|
| 713 | found = len(self.stack) - 1
|
|---|
| 714 | if found < 0:
|
|---|
| 715 | self.unknown_endtag(tag)
|
|---|
| 716 | return
|
|---|
| 717 | else:
|
|---|
| 718 | found = -1
|
|---|
| 719 | for i in range(len(self.stack)):
|
|---|
| 720 | if tag == self.stack[i][0]:
|
|---|
| 721 | found = i
|
|---|
| 722 | if found == -1:
|
|---|
| 723 | self.syntax_error('unopened end tag')
|
|---|
| 724 | return
|
|---|
| 725 | while len(self.stack) > found:
|
|---|
| 726 | if found < len(self.stack) - 1:
|
|---|
| 727 | self.syntax_error('missing close tag for %s' % self.stack[-1][2])
|
|---|
| 728 | nstag = self.stack[-1][2]
|
|---|
| 729 | method = self.elements.get(nstag, (None, None))[1]
|
|---|
| 730 | if method is not None:
|
|---|
| 731 | self.handle_endtag(nstag, method)
|
|---|
| 732 | else:
|
|---|
| 733 | self.unknown_endtag(nstag)
|
|---|
| 734 | if self.__use_namespaces == len(self.stack):
|
|---|
| 735 | self.__use_namespaces = 0
|
|---|
| 736 | del self.stack[-1]
|
|---|
| 737 |
|
|---|
| 738 | # Overridable -- handle xml processing instruction
|
|---|
| 739 | def handle_xml(self, encoding, standalone):
|
|---|
| 740 | pass
|
|---|
| 741 |
|
|---|
| 742 | # Overridable -- handle DOCTYPE
|
|---|
| 743 | def handle_doctype(self, tag, pubid, syslit, data):
|
|---|
| 744 | pass
|
|---|
| 745 |
|
|---|
| 746 | # Overridable -- handle start tag
|
|---|
| 747 | def handle_starttag(self, tag, method, attrs):
|
|---|
| 748 | method(attrs)
|
|---|
| 749 |
|
|---|
| 750 | # Overridable -- handle end tag
|
|---|
| 751 | def handle_endtag(self, tag, method):
|
|---|
| 752 | method()
|
|---|
| 753 |
|
|---|
| 754 | # Example -- handle character reference, no need to override
|
|---|
| 755 | def handle_charref(self, name):
|
|---|
| 756 | try:
|
|---|
| 757 | if name[0] == 'x':
|
|---|
| 758 | n = int(name[1:], 16)
|
|---|
| 759 | else:
|
|---|
| 760 | n = int(name)
|
|---|
| 761 | except ValueError:
|
|---|
| 762 | self.unknown_charref(name)
|
|---|
| 763 | return
|
|---|
| 764 | if not 0 <= n <= 255:
|
|---|
| 765 | self.unknown_charref(name)
|
|---|
| 766 | return
|
|---|
| 767 | self.handle_data(chr(n))
|
|---|
| 768 |
|
|---|
| 769 | # Definition of entities -- derived classes may override
|
|---|
| 770 | entitydefs = {'lt': '<', # must use charref
|
|---|
| 771 | 'gt': '>',
|
|---|
| 772 | 'amp': '&', # must use charref
|
|---|
| 773 | 'quot': '"',
|
|---|
| 774 | 'apos': ''',
|
|---|
| 775 | }
|
|---|
| 776 |
|
|---|
| 777 | # Example -- handle data, should be overridden
|
|---|
| 778 | def handle_data(self, data):
|
|---|
| 779 | pass
|
|---|
| 780 |
|
|---|
| 781 | # Example -- handle cdata, could be overridden
|
|---|
| 782 | def handle_cdata(self, data):
|
|---|
| 783 | pass
|
|---|
| 784 |
|
|---|
| 785 | # Example -- handle comment, could be overridden
|
|---|
| 786 | def handle_comment(self, data):
|
|---|
| 787 | pass
|
|---|
| 788 |
|
|---|
| 789 | # Example -- handle processing instructions, could be overridden
|
|---|
| 790 | def handle_proc(self, name, data):
|
|---|
| 791 | pass
|
|---|
| 792 |
|
|---|
| 793 | # Example -- handle relatively harmless syntax errors, could be overridden
|
|---|
| 794 | def syntax_error(self, message):
|
|---|
| 795 | raise Error('Syntax error at line %d: %s' % (self.lineno, message))
|
|---|
| 796 |
|
|---|
| 797 | # To be overridden -- handlers for unknown objects
|
|---|
| 798 | def unknown_starttag(self, tag, attrs): pass
|
|---|
| 799 | def unknown_endtag(self, tag): pass
|
|---|
| 800 | def unknown_charref(self, ref): pass
|
|---|
| 801 | def unknown_entityref(self, name):
|
|---|
| 802 | self.syntax_error("reference to unknown entity `&%s;'" % name)
|
|---|
| 803 |
|
|---|
| 804 |
|
|---|
| 805 | class TestXMLParser(XMLParser):
|
|---|
| 806 |
|
|---|
| 807 | def __init__(self, **kw):
|
|---|
| 808 | self.testdata = ""
|
|---|
| 809 | XMLParser.__init__(self, **kw)
|
|---|
| 810 |
|
|---|
| 811 | def handle_xml(self, encoding, standalone):
|
|---|
| 812 | self.flush()
|
|---|
| 813 | print 'xml: encoding =',encoding,'standalone =',standalone
|
|---|
| 814 |
|
|---|
| 815 | def handle_doctype(self, tag, pubid, syslit, data):
|
|---|
| 816 | self.flush()
|
|---|
| 817 | print 'DOCTYPE:',tag, repr(data)
|
|---|
| 818 |
|
|---|
| 819 | def handle_data(self, data):
|
|---|
| 820 | self.testdata = self.testdata + data
|
|---|
| 821 | if len(repr(self.testdata)) >= 70:
|
|---|
| 822 | self.flush()
|
|---|
| 823 |
|
|---|
| 824 | def flush(self):
|
|---|
| 825 | data = self.testdata
|
|---|
| 826 | if data:
|
|---|
| 827 | self.testdata = ""
|
|---|
| 828 | print 'data:', repr(data)
|
|---|
| 829 |
|
|---|
| 830 | def handle_cdata(self, data):
|
|---|
| 831 | self.flush()
|
|---|
| 832 | print 'cdata:', repr(data)
|
|---|
| 833 |
|
|---|
| 834 | def handle_proc(self, name, data):
|
|---|
| 835 | self.flush()
|
|---|
| 836 | print 'processing:',name,repr(data)
|
|---|
| 837 |
|
|---|
| 838 | def handle_comment(self, data):
|
|---|
| 839 | self.flush()
|
|---|
| 840 | r = repr(data)
|
|---|
| 841 | if len(r) > 68:
|
|---|
| 842 | r = r[:32] + '...' + r[-32:]
|
|---|
| 843 | print 'comment:', r
|
|---|
| 844 |
|
|---|
| 845 | def syntax_error(self, message):
|
|---|
| 846 | print 'error at line %d:' % self.lineno, message
|
|---|
| 847 |
|
|---|
| 848 | def unknown_starttag(self, tag, attrs):
|
|---|
| 849 | self.flush()
|
|---|
| 850 | if not attrs:
|
|---|
| 851 | print 'start tag: <' + tag + '>'
|
|---|
| 852 | else:
|
|---|
| 853 | print 'start tag: <' + tag,
|
|---|
| 854 | for name, value in attrs.items():
|
|---|
| 855 | print name + '=' + '"' + value + '"',
|
|---|
| 856 | print '>'
|
|---|
| 857 |
|
|---|
| 858 | def unknown_endtag(self, tag):
|
|---|
| 859 | self.flush()
|
|---|
| 860 | print 'end tag: </' + tag + '>'
|
|---|
| 861 |
|
|---|
| 862 | def unknown_entityref(self, ref):
|
|---|
| 863 | self.flush()
|
|---|
| 864 | print '*** unknown entity ref: &' + ref + ';'
|
|---|
| 865 |
|
|---|
| 866 | def unknown_charref(self, ref):
|
|---|
| 867 | self.flush()
|
|---|
| 868 | print '*** unknown char ref: &#' + ref + ';'
|
|---|
| 869 |
|
|---|
| 870 | def close(self):
|
|---|
| 871 | XMLParser.close(self)
|
|---|
| 872 | self.flush()
|
|---|
| 873 |
|
|---|
| 874 | def test(args = None):
|
|---|
| 875 | import sys, getopt
|
|---|
| 876 | from time import time
|
|---|
| 877 |
|
|---|
| 878 | if not args:
|
|---|
| 879 | args = sys.argv[1:]
|
|---|
| 880 |
|
|---|
| 881 | opts, args = getopt.getopt(args, 'st')
|
|---|
| 882 | klass = TestXMLParser
|
|---|
| 883 | do_time = 0
|
|---|
| 884 | for o, a in opts:
|
|---|
| 885 | if o == '-s':
|
|---|
| 886 | klass = XMLParser
|
|---|
| 887 | elif o == '-t':
|
|---|
| 888 | do_time = 1
|
|---|
| 889 |
|
|---|
| 890 | if args:
|
|---|
| 891 | file = args[0]
|
|---|
| 892 | else:
|
|---|
| 893 | file = 'test.xml'
|
|---|
| 894 |
|
|---|
| 895 | if file == '-':
|
|---|
| 896 | f = sys.stdin
|
|---|
| 897 | else:
|
|---|
| 898 | try:
|
|---|
| 899 | f = open(file, 'r')
|
|---|
| 900 | except IOError, msg:
|
|---|
| 901 | print file, ":", msg
|
|---|
| 902 | sys.exit(1)
|
|---|
| 903 |
|
|---|
| 904 | data = f.read()
|
|---|
| 905 | if f is not sys.stdin:
|
|---|
| 906 | f.close()
|
|---|
| 907 |
|
|---|
| 908 | x = klass()
|
|---|
| 909 | t0 = time()
|
|---|
| 910 | try:
|
|---|
| 911 | if do_time:
|
|---|
| 912 | x.feed(data)
|
|---|
| 913 | x.close()
|
|---|
| 914 | else:
|
|---|
| 915 | for c in data:
|
|---|
| 916 | x.feed(c)
|
|---|
| 917 | x.close()
|
|---|
| 918 | except Error, msg:
|
|---|
| 919 | t1 = time()
|
|---|
| 920 | print msg
|
|---|
| 921 | if do_time:
|
|---|
| 922 | print 'total time: %g' % (t1-t0)
|
|---|
| 923 | sys.exit(1)
|
|---|
| 924 | t1 = time()
|
|---|
| 925 | if do_time:
|
|---|
| 926 | print 'total time: %g' % (t1-t0)
|
|---|
| 927 |
|
|---|
| 928 |
|
|---|
| 929 | if __name__ == '__main__':
|
|---|
| 930 | test()
|
|---|
