Hi Daniel, thank you for the prompt response. There are not a whole lot of example around catalog, translating a SystemID into a new SystemID in particular. Suppose I go build a catalog. How do I tell the xmlReader to use it with the document I am about to open?
I did not find any examples to this. Tapping into the I/O with callbacks does not seem to achieve this. At least, the examples I see in io1.c do not help. Any further hints? Best regards: Zoltán Ördögh On Thu, Mar 28, 2013 at 3:51 AM, Daniel Veillard <veill...@redhat.com>wrote: > On Tue, Mar 26, 2013 at 03:48:13PM -0400, Zoltán Ördögh (GMail) wrote: > > Hi all, > > I am looking for a legal, built-in solution to override the SystemID in > an > > XML document without having to patch the document on-the-fly myself; I > want > > to avoid sting crunching when we have an advanced parser already. > > > > I.e.: > > xmlTextReaderPtr _ptrxmlReader=xmlReaderForFile(_sFilename.c_str(), > > _sEncoding, XML_PARSE_RECOVER, _sNewSystemID); > > > > I know it does not exist, this is just to illustrate what I want to > achieve > > - not necessarily like this, but in way that's already in libxml. > > > > Below, you can find the problem description. > > > > The XML is generated on a machine, where the DTD may be located in, for > > example: ~/tool/sample.dtd , resulting in: > > <!DOCTYPE xmlexport SYSTEM "file:///~/tool/sample.dtd"> > > > > The XML may be processed on other machines as well - where the DTD may be > > located elsewhere (e.g. /bin/tool/sample.dtd) - and then libxml > > (rightfully) throws an error because it did not find the DTD. > > The 'tool' knows its own location, so it could provide the new SystemID > to > > the XML reader. > > > > Any tips? > > > > Could this be added to libxml itself (as new reader constructors)? > > Hum, catalogs are done exactly for this: > http://xmlsoft.org/catalog.html > > otherwise just override the I/O handling something along the lines of > what is presented in: > http://xmlsoft.org/examples/index.html#io1.c > > Daniel > > -- > Daniel Veillard | Open Source and Standards, Red Hat > veill...@redhat.com | libxml Gnome XML XSLT toolkit http://xmlsoft.org/ > http://veillard.com/ | virtualization library http://libvirt.org/ >
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