Re: [xml] Error: failed to canonicalize XML file "-" (ret=-1)

[Aleksey Sanin <aleksey aleksey com>]

Mikhail,

Sorry for late reply, I was out of town and was not able to run a test 
on your file.

If you compile LibXML2 with DEBUG_C14N macro defined then you will get
the following output that gives a hint on what caused the problem:

[aleksey lsh libxml2]$ ./testC14N --without-comments /tmp/a.xml
xmlC14NProcessElementNode: xmlC14NCheckForRelativeNamespaces failed.
xmlC14NExecute: process childrens' list failed.
xmlC14NDocDumpMemory: xmlC14NDocSaveTo failed.
Error: failed to canonicalize XML file "./tmp/a.xml" (ret=-1)

The problem is "relative" URI in the namespace declaration. According to 
the spec ([1]),
LibXML2 does the right thing here:

*        Note:* This specification supports the recent XML plenary 
decision 
<http://www.w3.org/TR/2001/REC-xml-c14n-20010315#PlenaryDecision> to 
deprecate
       relative namespace URIs as follows: implementations of XML 
canonicalization
       MUST report an operation failure on documents containing 
relative namespace URIs.
       XML canonicalization MUST NOT be implemented with an XML parser 
that converts
       relative URIs to absolute URIs.


With best regards,
Aleksey

[1] http://www.w3.org/TR/2001/REC-xml-c14n-20010315



Mikhail S Grushinskiy wrote:

> Hello,
>
> Why testC14N would choke on this file?
>
> foo.xml
>
> <foo xmlns:foo="bar">
> <foo/>
> </foo>
>
> ./testC14N --with-comments foo.xml 
>
> Error: failed to canonicalize XML file "-" (ret=-1)
>
>