/proc/self/root/proc/self/root/proc/self/root/usr/lib64/python3.9/xml/etree
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## ElementTree# $Id: ElementInclude.py 3375 2008-02-13 08:05:08Z fredrik $## limited xinclude support for element trees## history:# 2003-08-15 fl created# 2003-11-14 fl fixed default loader## Copyright (c) 2003-2004 by Fredrik Lundh. All rights reserved.## fredrik@pythonware.com# http://www.pythonware.com## --------------------------------------------------------------------# The ElementTree toolkit is## Copyright (c) 1999-2008 by Fredrik Lundh## By obtaining, using, and/or copying this software and/or its# associated documentation, you agree that you have read, understood,# and will comply with the following terms and conditions:## Permission to use, copy, modify, and distribute this software and# its associated documentation for any purpose and without fee is# hereby granted, provided that the above copyright notice appears in# all copies, and that both that copyright notice and this permission# notice appear in supporting documentation, and that the name of# Secret Labs AB or the author not be used in advertising or publicity# pertaining to distribution of the software without specific, written# prior permission.## SECRET LABS AB AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD# TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANT-# ABILITY AND FITNESS. IN NO EVENT SHALL SECRET LABS AB OR THE AUTHOR# BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE# OF THIS SOFTWARE.# -------------------------------------------------------------------- # Licensed to PSF under a Contributor Agreement.# See https://www.python.org/psf/license for licensing details. ### Limited XInclude support for the ElementTree package.## import copyfrom . import ElementTreefrom urllib.parse import urljoin XINCLUDE = "{http://www.w3.org/2001/XInclude}" XINCLUDE_INCLUDE = XINCLUDE + "include"XINCLUDE_FALLBACK = XINCLUDE + "fallback" # For security reasons, the inclusion depth is limited to this read-only value by default.DEFAULT_MAX_INCLUSION_DEPTH = 6 ### Fatal include error. class FatalIncludeError(SyntaxError): pass class LimitedRecursiveIncludeError(FatalIncludeError): pass ### Default loader. This loader reads an included resource from disk.## @param href Resource reference.# @param parse Parse mode. Either "xml" or "text".# @param encoding Optional text encoding (UTF-8 by default for "text").# @return The expanded resource. If the parse mode is "xml", this# is an ElementTree instance. If the parse mode is "text", this# is a Unicode string. If the loader fails, it can return None# or raise an OSError exception.# @throws OSError If the loader fails to load the resource. def default_loader(href, parse, encoding=None): if parse == "xml": with open(href, 'rb') as file: data = ElementTree.parse(file).getroot() else: if not encoding: encoding = 'UTF-8' with open(href, 'r', encoding=encoding) as file: data = file.read() return data ### Expand XInclude directives.## @param elem Root element.# @param loader Optional resource loader. If omitted, it defaults# to {@link default_loader}. If given, it should be a callable# that implements the same interface as <b>default_loader</b>.# @param base_url The base URL of the original file, to resolve# relative include file references.# @param max_depth The maximum number of recursive inclusions.# Limited to reduce the risk of malicious content explosion.# Pass a negative value to disable the limitation.# @throws LimitedRecursiveIncludeError If the {@link max_depth} was exceeded.# @throws FatalIncludeError If the function fails to include a given# resource, or if the tree contains malformed XInclude elements.# @throws IOError If the function fails to load a given resource.# @returns the node or its replacement if it was an XInclude node def include(elem, loader=None, base_url=None, max_depth=DEFAULT_MAX_INCLUSION_DEPTH): if max_depth is None: max_depth = -1 elif max_depth < 0: raise ValueError("expected non-negative depth or None for 'max_depth', got %r" % max_depth) if hasattr(elem, 'getroot'): elem = elem.getroot() if loader is None: loader = default_loader _include(elem, loader, base_url, max_depth, set()) def _include(elem, loader, base_url, max_depth, _parent_hrefs): # look for xinclude elements i = 0 while i < len(elem): e = elem[i] if e.tag == XINCLUDE_INCLUDE: # process xinclude directive href = e.get("href") if base_url: href = urljoin(base_url, href) parse = e.get("parse", "xml") if parse == "xml": if href in _parent_hrefs: raise FatalIncludeError("recursive include of %s" % href) if max_depth == 0: raise LimitedRecursiveIncludeError( "maximum xinclude depth reached when including file %s" % href) _parent_hrefs.add(href) node = loader(href, parse) if node is None: raise FatalIncludeError( "cannot load %r as %r" % (href, parse) ) node = copy.copy(node) # FIXME: this makes little sense with recursive includes _include(node, loader, href, max_depth - 1, _parent_hrefs) _parent_hrefs.remove(href) if e.tail: node.tail = (node.tail or "") + e.tail elem[i] = node elif parse == "text": text = loader(href, parse, e.get("encoding")) if text is None: raise FatalIncludeError( "cannot load %r as %r" % (href, parse) ) if e.tail: text += e.tail if i: node = elem[i-1] node.tail = (node.tail or "") + text else: elem.text = (elem.text or "") + text del elem[i] continue else: raise FatalIncludeError( "unknown parse type in xi:include tag (%r)" % parse ) elif e.tag == XINCLUDE_FALLBACK: raise FatalIncludeError( "xi:fallback tag must be child of xi:include (%r)" % e.tag ) else: _include(e, loader, base_url, max_depth, _parent_hrefs) i += 1