You are passing an uninitialized variable sCtxt to xmlSaveTree. I'd
suggest you take a look at the documentation on xmlSaveTo... functions,
e.g.
xmlSaveCtxtPtr xmlSaveToBuffer(
xmlBufferPtr buffer,
const char * encoding,
int options)
at http://www.xmlsoft.org/html/libxml-xmlsave.html
Furthermore, when accessing the XPath query, you may want to use
xmlXPathNodeSetItem see
http://www.xmlsoft.org/html/libxml-xpath.html#xmlXPathNodeSetItem) and
do proper error checking (but you were going to add that later anyway,
weren't you? ;)
HTH
Lars
Krishna Kumar wrote:
> Hi,
>
> Am I using xmlSaveTree() properly in the following example? I am
> getting a "Internal error, no document" error on running this piece of
> code.
>
> Or is something else throwing that error? I am simply trying to
> extract a node and its decendants and storing them in a buffer, so i
> can use them in a string for later. BTW, the commented call to
> xmlElemDump() works.
>
> void SAMLAssertion::parse_assertion(const String &source) {
>
> XMLPlatformUtils::Initialize();
> xmlDocPtr doc;
> xmlXPathContextPtr xpathCtx;
> xmlXPathObjectPtr xpathObj;
>
> xmlSaveCtxtPtr sCtxt;
> xmlBufferPtr xbuf;
>
> doc = xmlParseMemory(source.chars(), source.length());
>
> xpathCtx = xmlXPathNewContext(doc);
>
> xmlXPathRegisterNs(xpathCtx, (const xmlChar* )"ds", (const
> xmlChar* )"http://www.w3.org/2000/09/xmldsig#";);
> xmlXPathRegisterNs(xpathCtx, (const xmlChar* )"saml", (const
> xmlChar* )"urn:oasis:names:tc:SAML:2.0:protocol");
>
> xpathObj = xmlXPathEvalExpression((const xmlChar*
> )"/ds:SignedInfo/descendant-or-self::node()", xpathCtx);
>
> xmlNodeSetPtr nodes = xpathObj->nodesetval;
>
> xbuf = xmlBufferCreate();
> xmlNodePtr node = nodes->nodeTab[0];
> xmlSaveTree(sCtxt,node);
> //xmlElemDump(stdout,doc,nodes->nodeTab[0]);
>
> xmlSaveClose(sCtxt);
> xmlFreeDoc(doc);
> xmlBufferFree(xbuf);
> XMLPlatformUtils::Terminate();
>
> }
>
> Thanks,
> Krishna Kumar
> _______________________________________________
> xml mailing list, project page http://xmlsoft.org/
> [email protected]
> http://mail.gnome.org/mailman/listinfo/xml
_______________________________________________
xml mailing list, project page http://xmlsoft.org/
[email protected]
http://mail.gnome.org/mailman/listinfo/xml
