Re: [xml] Need help on normalization/canonicalization with namespace prefix rewrite

[Aleksey Sanin <aleksey aleksey com>]

I don't understand what are you trying to do so I really don't have
a good answer for you.

Aleksey

On 1/29/18 12:33 AM, Mikhail Goloborodko wrote:
> Alexey,
>
> Thank you!
> I'am new to libxml2. Would appretiate if you advice how to achieve this.
> May be I need a callback for in Reader or Writer?
>
> Mikhail
>
> On Sun, Jan 28, 2018 at 10:02 PM, Aleksey Sanin <aleksey aleksey com
> <mailto:aleksey aleksey com>> wrote:
>
>     I am not sure what is the suggest algorithm to "rewrite namespace
>     prefixes". Regardless, this is not part of C14N spec and something
>     you will have to do yourself.
>
>     Aleksey
>
>     On 1/28/18 3:19 AM, Mikhail Goloborodko wrote:
>     > Hi All,
>     >
>     > I will appreciate if somebody could help on how to normalize and
>     > canonicalize XML.
>     >
>     > For example
>     > <?xml version="1.0" encoding="WINDOWS-1251"?>
>     > <ed:N1 attr="4583001999 <tel:4583001999>" xmlns:ed="urn:ru:ed:v2.0">
>     > </ed:N>
>     >
>     > I need to get
>     >
>     > <n1:N1 xmlns:n1="urn:cbr-ru:ed:v2.0" attr="4583001999"></n1:N1>
>     >
>     > And for
>     >
>     > <?xml version="1.0" encoding="WINDOWS-1251"?>
>     > <N1 attr="4583001999" xmlns="urn:ru:ed:v2.0">
>     >   <N2 attr="value"></N2>
>     > </N1>
>     >
>     > I need
>     >
>     > <n1:N1 xmlns:n1="urn:ru:ed:v2.0"> attr="4583001999"<n1:N2
>     > attr="value"></n1:N2></n1:N1>
>     >
>     > In other words I need to remove whitespaces and rewrite namespace
>     prefixes
>     > I use
>     > string src;
>     > xmlChar * canon;
>     > xmlDocPtr xDoc = xmlReadMemory(src.data(), src.size(), nullptr,
>     nullptr,
>     > XML_PARSE_NOBLANKS);
>     > int bytes = xmlC14NDocDumpMemory(xDoc, nullptr, 0, nullptr, 0, &
>     canon);
>     >
>     > It removes whitespaces, need help with namespace prefix rewrite.
>     >
>     > Thank you in advance.
>     >
>     > On Sun, Jan 28, 2018 at 12:41 AM, Mikhail Goloborodko
>     > <mgoloborodko gmail com <mailto:mgoloborodko gmail com>
>     <mailto:mgoloborodko gmail com <mailto:mgoloborodko gmail com>>> wrote:
>     >
>     >     Hi,
>     >
>     >     I need help on how to normalize and canonicalize XML.
>     >     For example
>     >     <?xml version="1.0" encoding="WINDOWS-1251"?>
>     >     <ed:N1 attr="4583001999 <tel:4583001999>"
>     xmlns:ed="urn:ru:ed:v2.0">
>     >     </ed:N>
>     >
>     >     I need to get
>     >
>     >     <n1:N1 xmlns:n1="urn:cbr-ru:ed:v2.0" attr="4583001999"></n1:N1>
>     >
>     >     And for
>     >
>     >     <?xml version="1.0" encoding="WINDOWS-1251"?>
>     >     <N1 attr="4583001999" xmlns="urn:ru:ed:v2.0">
>     >       <N2 attr="value"></N2>
>     >     </N1>
>     >
>     >     I need
>     >
>     >     <n1:N1 attr="4583001999" xmlns="urn:ru:ed:v2.0"><n1:N2
>     >     attr="value"></n1:N2></n1:N1>
>     >
>     >     In other words I need to remove whitespaces and rewrite namespace
>     >     prefixes
>     >     I use
>     >     string src;
>     >     xmlChar * canon;
>     >     xmlDocPtr xDoc = xmlReadMemory(src.data(), src.size(), nullptr,
>     >     nullptr, XML_PARSE_NOBLANKS);
>     >     int bytes = xmlC14NDocDumpMemory(xDoc, nullptr, 0, nullptr, 0,
>     & canon);
>     >
>     >     It clearly removes whitespace, need help with namespace prefix
>     rewrite.
>     >
>     >     Thank you in advance.
>     >
>     >     Mikhail 
>     >
>     >
>     >
>     >
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