[XML-SIG] prepare_input_source and relative path
mike at skew.org
Tue Feb 8 12:13:01 CET 2005
Sylvain Thénault wrote:
> - prepare_input_source('relative.xml', '/base') -> /base/relative.xml
> the sf submitted patch fix this one to.
Under no circumstances should '/base' + 'relative.xml' == '/base/relative.xml'.
It would only be an acceptable result if you had '/base/' instead of '/base'.
> - prepare_input_source('file:relative.xml', '/base') ->
Same here. This is incorrect.
> this allow to have a xml file containing relative system identifiers
> such as:
> <!ENTITY plans SYSTEM "file:plans.xml">
(1) 'file:plans.xml' is not a relative URI reference.
(2) The result of merging the reference 'file:plans.xml' with *any* base URI
must be 'file:plans.xml'. RFC 3986 sec. 5 governs this resolution.
> <!ENTITY chatbot SYSTEM "chatbot.xml">
> where parse(open('path to my xml file')) should not fail as it currently
Trust me, you'll find that it is much easier to implement RFC 3986 sec. 5 than
it is to work around bugs in urllib and urlparse. I suggest porting Absolutize()
and BaseJoin() from 4Suite's Ft.Lib.Uri.
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