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########################################################################
#
# File Name: __init__.py
#
#
"""
The 4DOM reader module has routines for deserializing XML and HTML to DOM
WWW: http://4suite.org/4DOM e-mail: support@4suite.org
Copyright (c) 2000 Fourthought Inc, USA. All Rights Reserved.
See http://4suite.org/COPYRIGHT for license and copyright information
"""
import string, urllib2, urlparse, cStringIO, os
from xml.dom.ext import ReleaseNode
try:
import codecs
from types import UnicodeType
encoder = codecs.lookup("utf-8")[0] # encode,decode,reader,writer
def StrStream(st):
if type(st) is UnicodeType:
st = encoder(st)[0]
return cStringIO.StringIO(st)
except ImportError:
StrStream = lambda x: cStringIO.StringIO(x)
class BaseUriResolver:
def resolve(self, uri, base=''):
#scheme, netloc, path, params, query, fragment
scheme = urlparse.urlparse(uri)[0]
if scheme in ['', 'http', 'ftp', 'file', 'gopher']:
uri = urlparse.urljoin(base, uri)
if os.access(uri, os.F_OK):
#Hack because urllib breaks on Windows paths
stream = open(uri)
else:
stream = urllib2.urlopen(uri)
return stream
BASIC_RESOLVER = BaseUriResolver()
class Reader:
def clone(self):
"""Used to create a new copy of this instance"""
if hasattr(self,'__getinitargs__'):
return apply(self.__class__,self.__getinitargs__())
else:
return self.__class__()
def fromStream(self, stream, ownerDoc=None):
"""Create a DOM from a stream"""
raise "NOT OVERIDDEN"
def fromString(self, str, ownerDoc=None):
"""Create a DOM from a string"""
stream = StrStream(str)
try:
return self.fromStream(stream, ownerDoc)
finally:
stream.close()
def fromUri(self, uri, ownerDoc=None):
stream = BASIC_RESOLVER.resolve(uri)
try:
return self.fromStream(stream, ownerDoc)
finally:
stream.close()
def releaseNode(self, node):
"Free a DOM tree"
node and ReleaseNode(node)
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