[XML-SIG] Serializing DOM tree to file

[Rich Salz]

On Fri, 16 May 2003, Nickolay Kolev wrote:
> Basically, what I want to do is to have what PrettyPrint from
> xml.dom.ext writes to the console. But I want it in a file.

I was going to say that PrettyPrint is pretty ugly, because it moves
all the namespace declarations up to the outermost element.

Well it's worse than ugly, it's seriously broken.  It moves the default
namespace declaration to the top.  Here's my prettyprint script:
    ; cat $h/bin/xml/pp
    #! /usr/bin/env python2
    import sys
    from xml.dom.ext.reader import PyExpat
    from xml.dom.ext import PrettyPrint
    r = PyExpat.Reader()
    dom = r.fromStream(sys.stdin)
    PrettyPrint(dom)

Here's the input:
    ; cat x.xml
    <S:foo xmlns:S="http://example.com/1">
        <bar>test</bar>
        <bar xmlns='http://example.com/2'>test2</bar>
        <S:bar xmlns:S='http://example.com/2'>test2</S:bar>
    </S:foo>

And the output:
    <?xml version='1.0' encoding='UTF-8'?>
    <S:foo xmlns:S='http://example.com/1' xmlns='http://example.com/2'>
      <bar>test</bar>
      <bar>test2</bar>
      <S:bar xmlns:S='http://example.com/2'>test2</S:bar>
    </S:foo>

Seriously broken!

    from xml.com.ext.c14n import Canonicalize
    s = Canonicalize(node)         # returns output as a string
    Canonicalize(node, sys.stdout) # anything with a write() method


--
Rich Salz                     Chief Security Architect
DataPower Technology          http://www.datapower.com
XS40 XML Security Gateway     http://www.datapower.com/products/xs40.html