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„ Z d „ Z d „ Z d f d „ ƒ YZ d d „ Z d S( s¼ XML Canonicalization
This module generates canonical XML of a document or element.
http://www.w3.org/TR/2001/REC-xml-c14n-20010315
and includes a prototype of exclusive canonicalization
http://www.w3.org/Signature/Drafts/xml-exc-c14n
Requires PyXML 0.7.0 or later.
Known issues if using Ft.Lib.pDomlette:
1. Unicode
2. does not white space normalize attributes of type NMTOKEN and ID?
3. seems to be include "
" after importing external entities?
Note, this version processes a DOM tree, and consequently it processes
namespace nodes as attributes, not from a node's namespace axis. This
permits simple document and element canonicalization without
XPath. When XPath is used, the XPath result node list is passed and used to
determine if the node is in the XPath result list, but little else.
Authors:
"Joseph M. Reagle Jr." <reagle@w3.org>
"Rich Salz" <rsalz@zolera.com>
$Date: 2003/01/25 11:41:21 $ by $Author: loewis $
s* Copyright 2001, Zolera Systems Inc. All Rights Reserved.
Copyright 2001, MIT. All Rights Reserved.
Distributed under the terms of:
Python 2.0 License or later.
http://www.python.org/2.0.1/license.html
or
W3C Software License
http://www.w3.org/Consortium/Legal/copyright-software-19980720
N( s Node( s XMLNSt XMLNSc B s t Z d Z d Z RS( Ns http://www.w3.org/2000/xmlns/s$ http://www.w3.org/XML/1998/namespace( t __name__t
__module__t BASEt XML( ( ( t9 /usr/lib/python2.4/site-packages/_xmlplus/dom/ext/c14n.pyR - s c C s | i o | i i ƒ p g S( N( t Et
attributest values( R ( ( R t <lambda>6 s c C s | i p g S( N( R t
childNodes( R ( ( R R 7 s c C s | i i d ƒ S( Nt xmlns( t nt namet
startswith( R ( ( R R 8 s c C s
| i d j S( N( R t unsuppressedPrefixest None( R ( ( R R 9 s i c C s7 t | i | i ƒ } | o | Sn t | i | i ƒ S( sB _sorter(n1,n2) -> int
Sorting predicate for non-NS attributes.N( t cmpt n1t namespaceURIt n2t it localName( R R R ( ( R t _sorter@ s
c C sG | d d j o d Sn | d d j o d Sn t | d | d ƒ S( sY _sorter_ns((n,v),(n,v)) -> int
"(an empty namespace URI is lexicographically least)."i R iÿÿÿÿi N( R R R ( R R ( ( R t
_sorter_nsI s c C s± | i d ƒ o | d } n | i d ƒ o | d } n | d j o | i d d g j p | | i j p
| | j o d Sn x& | D] } | | i j o d Sq‹ q‹ Wd S(
s~ _utilized(n, node, other_attrs, unsuppressedPrefixes) -> boolean
Return true if that nodespace is utilized within the nodes xmlns:i R i t s #defaulti i N( R R t nodet prefixR R t other_attrst attr( R R R R R ( ( R t _utilizedQ s @ c C s | d j p
| | j S( N( t subsetR R ( R R ( ( R R a s t _implementationc B s t Z d Z h Z d „ Z d „ Z d „ Z e e e i <d „ Z e e e i
<e e e i <d „ Z e e e i
<d „ Z e e e i <d „ Z g d „ Z e e e i <RS( sƒ Implementation class for C14N. This accompanies a node during it's
processing and includes the parameters and processing state.c K s2 | | _ | i d ƒ | _ | i d d ƒ | _ | i d ƒ | _ | i d h d t i <d t i <ƒ } | h d d <h f | _ | i
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t i j o n t t | ƒ ‚ d S(
s" Create and run the implementation.R t commentsi R t nsdictt xmlR R N( t writet selft kwt getR R! R R R R R" t stateR t nodeTypet Nodet
DOCUMENT_NODEt _do_documentt ELEMENT_NODEt _Elementt
documentOrdert
_inclusivet _do_elementt _inherit_contextt inheritedt DOCUMENT_TYPE_NODEt TypeErrort str( R% R R$ R& R3 R" ( ( R t __init__j s$ *
c C s¨ t t t | ƒ ƒ } g | i } } x| | ot | i t i
j oa xQ t t t | ƒ ƒ D]: } | i } | | j o | i | ƒ | i | ƒ qX qX W| i } q( W| S( sÅ _inherit_context(self, node) -> list
Scan ancestors of attribute and namespace context. Used only
for single element node canonicalization, not for subset
canonicalization.N( t filtert
_IN_XML_NSt _attrsR t xmlattrst
parentNodeR3 t parentR) R* R- t aR R t append( R% R R= R> R3 R R; ( ( R R2 „ s
c C sÅ t | _ xµ | i D]ª } | i t i j o# t | _ | i
| ƒ t | _ q | i t i j o | i
| ƒ q | i t i j o | i | ƒ q | i t i j o q t t | ƒ ‚ q Wd S( sË _do_document(self, node) -> None
Process a document node. documentOrder holds whether the document
element has been encountered such that PIs/comments can be written
as specified.N( t _LesserElementR% R/ R R
t childR) R* R- R. R1 t _GreaterElementt PROCESSING_INSTRUCTION_NODEt _do_pit COMMENT_NODEt _do_commentR4 R5 R6 ( R% R RA ( ( R R, ™ s
c C sŽ t | i | ƒ p d Sn t i | i d d ƒ } t i | d d ƒ } t i | d d ƒ } t i | d d ƒ } | o | i | ƒ n d S(
s“ _do_text(self, node) -> None
Process a text or CDATA node. Render various special characters
as their C14N entity representations.Nt &s &t <s <t >s >s
s 
( t
_in_subsetR% R R t stringt replacet datat sR$ ( R% R RN ( ( R t _do_text° s c C s t | i | ƒ p d Sn | i } | i t j o | d ƒ n | d ƒ | | i ƒ | i } | o | d ƒ | | ƒ n | d ƒ | i t j o | d ƒ n d S( sÎ _do_pi(self, node) -> None
Process a PI node. Render a leading or trailing #xA if the
document order of the PI is greater or lesser (respectively)
than the document element.
Ns
s <?t s ?>( RJ R% R R R$ t WR/ RB t nodeNameRM RN R@ ( R% R RN RQ ( ( R RD ¾ s
c C s“ t | i | ƒ p d Sn | i oj | i } | i t j o | d ƒ n | d ƒ | | i ƒ | d ƒ | i t
j o | d ƒ q n d S( sÝ _do_comment(self, node) -> None
Process a comment node. Render a leading or trailing #xA if the
document order of the comment is greater or lesser (respectively)
than the document element.
Ns
s <!--s -->( RJ R% R R R! R$ RQ R/ RB RM R@ ( R% R RQ ( ( R RF Ò s
c C s½ | i } | d ƒ | | ƒ | d ƒ t i | d d ƒ } t i | d d ƒ } t i | d d ƒ } t i | d d
ƒ } t i | d d ƒ } t i | d
d ƒ } | | ƒ | d ƒ d S( s; '_do_attr(self, node) -> None
Process an attribute.RP s ="RG s &RH s <t "s "s s 	s
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N( R% R$ RQ R RK RL t valueRN ( R% R RT RN RQ ( ( R t _do_attrã s
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S( sh _do_element(self, node, initial_other_attrs = []) -> None
Process an element (and its children).i i i s xmlns:R RH R s xmlns:xmlR# s$ http://www.w3.org/XML/1998/namespaceRI s </%s>N(1 R% R( t copyt ns_parentt ns_renderedt xml_attrst ns_localt xml_attrs_localt initial_other_attrsR RJ R R t in_subsetR: R> R R R RR R t nodeValueR R0 R? t updateR$ R RQ R
t ns_to_rendert itemst vR' R R t sortR RU R< t extendR R RT t _childrent cR t handlersR) ( R% R R\ RY RW R] R( RX R` R[ RQ R> Rf R
R R Rb RZ ( ( R R1 õ sj 5
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( R R t __doc__Rg R7 R2 R, R* R+ RO t TEXT_NODEt CDATA_SECTION_NODERD RC RF RE RU R1 R- ( ( ( R R c s
Yc K sW | o t t | | i f | ƒ n0 t i ƒ } t t | | i f | ƒ | i ƒ Sd S( s™ Canonicalize(node, output=None, **kw) -> UTF-8
Canonicalize a DOM document/element node and all descendents.
Return the text; if output is specified then output.write will
be called to output the text and None will be returned
Keyword parameters:
nsdict: a dictionary of prefix:uri namespace entries
assumed to exist in the surrounding context
comments: keep comments if non-zero (default is 0)
subset: Canonical XML subsetting resulting from XPath
(default is [])
unsuppressedPrefixes: do exclusive C14N, and this specifies the
prefixes that should be inherited.
N( t outputt applyR R R$ R& t StringIORN t getvalue( R Rk R& RN ( ( R t CanonicalizeQ s ( Rh t
_copyrightRK t xml.domR* t xml.nsR t cStringIORm t ImportErrorR: Re R9 R0 t rangeR@ R. RB R R R RJ R R Ro ( Rs Re R Rp R* R R: R RK R. RJ R R0 R R9 Rm Ro R@ RB ( ( R t ? s.
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