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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <libxml/tree.h>
#include <libxml/parser.h>
#include <libxml/xpath.h>
#include <libxml/xpathInternals.h>
#include <libxml/relaxng.h>
#include <libxslt/xslt.h>
#include <libxslt/xsltInternals.h>
#include <libxslt/transform.h>
#include <libxslt/xsltutils.h>
#define XMLCHARLEN 255
/* If a default namespace is defined
*
* IMPORTANT: XPath 1.0 has no concept of a default namespace. Unprefixed names in XPath only match names which have no namespace.
* So, if the document uses a default namespace, it is required to associate a non-empty prefix with the default namespace
* via register-namespace and add that prefix to names in XPath expressions intended to match nodes in the default namespace.
*/
xmlChar *default_namespace_prefix = (xmlChar *) "def";
char * find_value_by_xpath(xmlDocPtr doc, xmlChar * xpathExpr, xmlChar *prefix, xmlChar * namespace)
{
xmlXPathContextPtr xpathCtx;
xmlXPathObjectPtr xpathObj;
char *result=NULL;
xmlNodeSetPtr nodeset;
int i;
xmlChar *str;
/* Create xpath evaluation context */
xpathCtx = xmlXPathNewContext(doc);
if (xpathCtx == NULL) {
fprintf(stderr, "Error: unable to create new XPath context\n");
return(NULL);
}
/* Register a namespace */
if (xmlXPathRegisterNs (xpathCtx, prefix, namespace) != 0) {
fprintf(stderr,
"Error: unable to register NS with prefix=\"%s\" and href=\"%s\"\n",
"my", namespace);
xmlXPathFreeContext(xpathCtx);
return(NULL);
}
/* Evaluate xpath expression */
xpathObj = xmlXPathEvalExpression(xpathExpr, xpathCtx);
if (xpathObj == NULL) {
fprintf(stderr,
"Error: unable to evaluate xpath expression \"%s\"\n", xpathExpr);
xmlXPathFreeContext(xpathCtx);
return(NULL);
}
if (xmlXPathNodeSetIsEmpty(xpathObj->nodesetval)) {
printf("Nothing found ...\n");
xmlXPathFreeObject(xpathObj);
xmlXPathFreeContext(xpathCtx);
return(NULL);
} else if (xmlXPathNodeSetGetLength(xpathObj->nodesetval) != 1 ) {
fprintf(stderr,"More than one node found!");
xmlXPathFreeObject(xpathObj);
xmlXPathFreeContext(xpathCtx);
return(NULL);
} else {
nodeset = xpathObj->nodesetval;
/* FIXME: only allow one found value */
for (i = 0; i < nodeset->nodeNr; i++) {
str = xmlNodeListGetString(doc, nodeset->nodeTab[i]->xmlChildrenNode, 1);
result = strdup((char *) str);
xmlFree(str);
}
}
xmlXPathFreeObject(xpathObj);
xmlXPathFreeContext(xpathCtx);
return result;
}
int main(int argc, char **argv)
{
xmlDocPtr doc;
xmlNodePtr rootNode;
xmlChar *default_namespace;
xmlChar xpathExpr[XMLCHARLEN];
char *rngFileName;
char *xsltFileName;
char *output_file_name;
char *output_file_owner;
char *output_file_group;
char *output_file_permission;
xmlRelaxNGValidCtxtPtr rngCtx;
xmlDocPtr xsltDoc;
xsltStylesheetPtr cur = NULL;
xmlDocPtr res;
int ret;
if (argc != 2) {
fprintf(stderr,
"missing or to many arguments, I expect a single filename!\n");
exit(1);
}
doc = xmlParseFile(argv[1]);
if (doc == NULL) {
fprintf(stderr, "Cannot parse document %s!\n", argv[1]);
exit(1);
}
/* find the default namespace */
rootNode=xmlDocGetRootElement(doc);
if(rootNode==NULL) {
fprintf(stderr, "Cannot find root node of document %s!\n", argv[1]);
exit(1);
}
if(xmlStrncasecmp(rootNode->name,(xmlChar *) "IPA", XMLCHARLEN) != 0) {
fprintf(stderr, "Name of root node of document %s has to be 'ipa'!\n", argv[1]);
exit(1);
}
if(rootNode->ns->href==NULL) {
fprintf(stderr, "Root node of document %s must define a namespace!\n", argv[1]);
exit(1);
}
default_namespace=xmlStrndup(rootNode->ns->href,XMLCHARLEN);
if(default_namespace==NULL) {
fprintf(stderr, "Cannot copy namespace!\n");
exit(1);
}
/* extract XSTLfile and RNGfile from document using XPath */
xmlStrPrintf(xpathExpr, XMLCHARLEN, (xmlChar *) "//%s:XSLTfile", default_namespace_prefix);
xsltFileName=find_value_by_xpath(doc,xpathExpr, default_namespace_prefix, default_namespace);
printf("--%s--\n", xsltFileName);
xmlStrPrintf(xpathExpr, XMLCHARLEN, (xmlChar *) "//%s:RNGfile", default_namespace_prefix);
rngFileName=find_value_by_xpath(doc,xpathExpr, default_namespace_prefix, default_namespace);
printf("--%s--\n", rngFileName);
/* validate the document */
rngCtx =
xmlRelaxNGNewValidCtxt(xmlRelaxNGParse
(xmlRelaxNGNewParserCtxt(rngFileName)));
if (rngCtx == NULL) {
fprintf(stderr, "Failed to create RNG context\n");
exit(-1);
}
if (xmlRelaxNGValidateDoc(rngCtx, doc) == 0) {
printf("The document is valid.\n");
} else {
fprintf(stderr, "Error during validation.\n");
}
xmlRelaxNGFreeValidCtxt(rngCtx);
free(rngFileName);
/* read the xslt file */
xsltDoc = xmlParseFile(xsltFileName);
if (xsltDoc == NULL) {
fprintf(stderr, "Cannot parse file %s!\n", xsltFileName);
exit(1);
}
output_file_name=find_value_by_xpath(xsltDoc,(xmlChar *) "//md:output_file/@name",(xmlChar *) "md", (xmlChar *) "http://freeipa.org/xsl/metadata/1.0");
output_file_owner=find_value_by_xpath(xsltDoc,(xmlChar *) "//md:output_file/@owner",(xmlChar *) "md", (xmlChar *) "http://freeipa.org/xsl/metadata/1.0");
output_file_group=find_value_by_xpath(xsltDoc,(xmlChar *) "//md:output_file/@group",(xmlChar *) "md", (xmlChar *) "http://freeipa.org/xsl/metadata/1.0");
output_file_permission=find_value_by_xpath(xsltDoc,(xmlChar *) "//md:output_file/@permission",(xmlChar *) "md", (xmlChar *) "http://freeipa.org/xsl/metadata/1.0");
printf("-%s-\n",output_file_name);
printf("-%s-\n",output_file_owner);
printf("-%s-\n",output_file_group);
printf("-%s-\n",output_file_permission);
cur = xsltParseStylesheetDoc(xsltDoc);
if (cur == NULL) {
fprintf(stderr, "Cannot parse stylesheet %s!\n", xsltFileName);
exit(1);
}
res = xsltApplyStylesheet(cur, doc, NULL);
if (xsltDoc == NULL) {
fprintf(stderr, "Cannot apply stylesheet %s!\n", xsltFileName);
exit(1);
}
ret = xsltSaveResultToFile(stdout, res, cur);
if (ret == -1) {
fprintf(stderr, "Cannot save result!\n");
exit(1);
}
xmlFreeDoc(res);
xsltFreeStylesheet(cur);
free(xsltFileName);
xmlFreeDoc(doc);
return (0);
}
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