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saxutils.pyc
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2003-12-30
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317 lines
# Source Generated with Decompyle++
# File: in.pyc (Python 2.3)
'''A library of useful helper classes to the SAX classes, for the
convenience of application and driver writers.
'''
import os
import urlparse
import urllib
import types
import handler
import xmlreader
try:
_StringTypes = [
types.StringType,
types.UnicodeType]
except AttributeError:
_StringTypes = [
types.StringType]
def __dict_replace(s, d):
'''Replace substrings of a string using a dictionary.'''
for key, value in d.items():
s = s.replace(key, value)
return s
def escape(data, entities = { }):
'''Escape &, <, and > in a string of data.
You can escape other strings of data by passing a dictionary as
the optional entities parameter. The keys and values must all be
strings; each key will be replaced with its corresponding value.
'''
data = data.replace('&', '&')
data = data.replace('>', '>')
data = data.replace('<', '<')
if entities:
data = __dict_replace(data, entities)
return data
def unescape(data, entities = { }):
'''Unescape &, <, and > in a string of data.
You can unescape other strings of data by passing a dictionary as
the optional entities parameter. The keys and values must all be
strings; each key will be replaced with its corresponding value.
'''
data = data.replace('<', '<')
data = data.replace('>', '>')
if entities:
data = __dict_replace(data, entities)
return data.replace('&', '&')
def quoteattr(data, entities = { }):
'''Escape and quote an attribute value.
Escape &, <, and > in a string of data, then quote it for use as
an attribute value. The " character will be escaped as well, if
necessary.
You can escape other strings of data by passing a dictionary as
the optional entities parameter. The keys and values must all be
strings; each key will be replaced with its corresponding value.
'''
data = escape(data, entities)
if '"' in data:
if "'" in data:
data = '"%s"' % data.replace('"', '"')
else:
data = "'%s'" % data
else:
data = '"%s"' % data
return data
class XMLGenerator(handler.ContentHandler):
def __init__(self, out = None, encoding = 'iso-8859-1'):
if out is None:
import sys
out = sys.stdout
handler.ContentHandler.__init__(self)
self._out = out
self._ns_contexts = [
{ }]
self._current_context = self._ns_contexts[-1]
self._undeclared_ns_maps = []
self._encoding = encoding
def startDocument(self):
self._out.write('<?xml version="1.0" encoding="%s"?>\n' % self._encoding)
def startPrefixMapping(self, prefix, uri):
self._ns_contexts.append(self._current_context.copy())
self._current_context[uri] = prefix
self._undeclared_ns_maps.append((prefix, uri))
def endPrefixMapping(self, prefix):
self._current_context = self._ns_contexts[-1]
del self._ns_contexts[-1]
def startElement(self, name, attrs):
self._out.write('<' + name)
for name, value in attrs.items():
self._out.write(' %s=%s' % (name, quoteattr(value)))
self._out.write('>')
def endElement(self, name):
self._out.write('</%s>' % name)
def startElementNS(self, name, qname, attrs):
if name[0] is None:
name = name[1]
else:
name = self._current_context[name[0]] + ':' + name[1]
self._out.write('<' + name)
for pair in self._undeclared_ns_maps:
self._out.write(' xmlns:%s="%s"' % pair)
self._undeclared_ns_maps = []
for name, value in attrs.items():
name = self._current_context[name[0]] + ':' + name[1]
self._out.write(' %s=%s' % (name, quoteattr(value)))
self._out.write('>')
def endElementNS(self, name, qname):
if name[0] is None:
name = name[1]
else:
name = self._current_context[name[0]] + ':' + name[1]
self._out.write('</%s>' % name)
def characters(self, content):
self._out.write(escape(content))
def ignorableWhitespace(self, content):
self._out.write(content)
def processingInstruction(self, target, data):
self._out.write('<?%s %s?>' % (target, data))
class XMLFilterBase(xmlreader.XMLReader):
"""This class is designed to sit between an XMLReader and the
client application's event handlers. By default, it does nothing
but pass requests up to the reader and events on to the handlers
unmodified, but subclasses can override specific methods to modify
the event stream or the configuration requests as they pass
through."""
def __init__(self, parent = None):
xmlreader.XMLReader.__init__(self)
self._parent = parent
def error(self, exception):
self._err_handler.error(exception)
def fatalError(self, exception):
self._err_handler.fatalError(exception)
def warning(self, exception):
self._err_handler.warning(exception)
def setDocumentLocator(self, locator):
self._cont_handler.setDocumentLocator(locator)
def startDocument(self):
self._cont_handler.startDocument()
def endDocument(self):
self._cont_handler.endDocument()
def startPrefixMapping(self, prefix, uri):
self._cont_handler.startPrefixMapping(prefix, uri)
def endPrefixMapping(self, prefix):
self._cont_handler.endPrefixMapping(prefix)
def startElement(self, name, attrs):
self._cont_handler.startElement(name, attrs)
def endElement(self, name):
self._cont_handler.endElement(name)
def startElementNS(self, name, qname, attrs):
self._cont_handler.startElement(name, attrs)
def endElementNS(self, name, qname):
self._cont_handler.endElementNS(name, qname)
def characters(self, content):
self._cont_handler.characters(content)
def ignorableWhitespace(self, chars):
self._cont_handler.ignorableWhitespace(chars)
def processingInstruction(self, target, data):
self._cont_handler.processingInstruction(target, data)
def skippedEntity(self, name):
self._cont_handler.skippedEntity(name)
def notationDecl(self, name, publicId, systemId):
self._dtd_handler.notationDecl(name, publicId, systemId)
def unparsedEntityDecl(self, name, publicId, systemId, ndata):
self._dtd_handler.unparsedEntityDecl(name, publicId, systemId, ndata)
def resolveEntity(self, publicId, systemId):
self._ent_handler.resolveEntity(publicId, systemId)
def parse(self, source):
self._parent.setContentHandler(self)
self._parent.setErrorHandler(self)
self._parent.setEntityResolver(self)
self._parent.setDTDHandler(self)
self._parent.parse(source)
def setLocale(self, locale):
self._parent.setLocale(locale)
def getFeature(self, name):
return self._parent.getFeature(name)
def setFeature(self, name, state):
self._parent.setFeature(name, state)
def getProperty(self, name):
return self._parent.getProperty(name)
def setProperty(self, name, value):
self._parent.setProperty(name, value)
def getParent(self):
return self._parent
def setParent(self, parent):
self._parent = parent
def prepare_input_source(source, base = ''):
'''This function takes an InputSource and an optional base URL and
returns a fully resolved InputSource object ready for reading.'''
if type(source) in _StringTypes:
source = xmlreader.InputSource(source)
elif hasattr(source, 'read'):
f = source
source = xmlreader.InputSource()
source.setByteStream(f)
if hasattr(f, 'name'):
source.setSystemId(f.name)
if source.getByteStream() is None:
sysid = source.getSystemId()
if os.path.isfile(sysid):
basehead = os.path.split(os.path.normpath(base))[0]
source.setSystemId(os.path.join(basehead, sysid))
f = open(sysid, 'rb')
else:
source.setSystemId(urlparse.urljoin(base, sysid))
f = urllib.urlopen(source.getSystemId())
source.setByteStream(f)
return source