int
main(int argc, char** argv) {
if((argc < 3) || (argc > 4)) {
cerr << "Error: wrong number of arguments." << endl;
return(-1);
}
/* Init libxml */
LIBXML_TEST_VERSION
xmlDocPtr doc = getXmlDocFromFile(argv[1]);
if (!doc) {
cerr <<"main: problem getting xml from " << argv[1] << endl;
return(-1);
}
xmlXPathObjectPtr query_nodes = doXpathQuery(doc, BAD_CAST argv[2]);
if (!query_nodes) {
cerr << "xpath query :" << argv[1] << " on document " << argv[2] << " returned nothing\n" << endl;
return(1);
}
print_xpath_nodes(query_nodes->nodesetval, stdout);
return 0;
}
/**
* execute_xpath_expression:
* @filename:the input XML filename.
* @xpathExpr:the xpath expression for evaluation.
* @nsList:the optional list of known namespaces in
*"<prefix1>=<href1> <prefix2>=href2> ..." format.
*
* Parses input XML file, evaluates XPath expression and prints results.
*
* Returns 0 on success and a negative value otherwise.
*/
int
execute_xpath_expression(const char* filename, const xmlChar* xpathExpr, const xmlChar* nsList) {
xmlDocPtr doc;
xmlXPathContextPtr xpathCtx;
xmlXPathObjectPtr xpathObj;
assert(filename);
assert(xpathExpr);
/* Load XML document */
doc = xmlParseFile(filename);
if (doc == NULL) {
fprintf(stderr, "Error: unable to parse file \"%s\"\n", filename);
return(-1);
}
/* Create xpath evaluation context */
xpathCtx = xmlXPathNewContext(doc);
if(xpathCtx == NULL) {
fprintf(stderr,"Error: unable to create new XPath context\n");
xmlFreeDoc(doc);
return(-1);
}
/* Register namespaces from list (if any) */
if((nsList != NULL) && (register_namespaces(xpathCtx, nsList) < 0)) {
fprintf(stderr,"Error: failed to register namespaces list \"%s\"\n", nsList);
xmlXPathFreeContext(xpathCtx);
xmlFreeDoc(doc);
return(-1);
}
/* Evaluate xpath expression */
xpathObj = xmlXPathEvalExpression(xpathExpr, xpathCtx);
if(xpathObj == NULL) {
fprintf(stderr,"Error: unable to evaluate xpath expression \"%s\"\n", xpathExpr);
xmlXPathFreeContext(xpathCtx);
xmlFreeDoc(doc);
return(-1);
}
/* Print results */
print_xpath_nodes(xpathObj->nodesetval, stdout);
/* Cleanup */
xmlXPathFreeObject(xpathObj);
xmlXPathFreeContext(xpathCtx);
xmlFreeDoc(doc);
return(0);
}
/*
* Extract element corresponding to xpath
* xml_path The path to the xml file
* xpath: The xpath to evaluate.
*
* Evaluate an xpath expression onto an xml file.
* and print the result one by line.
*
* Returns 0 on success and a negative value otherwise.
*/
static int extract_xpath(const char *xml_path, const xmlChar *xpath)
{
xmlDocPtr doc = NULL;
xmlXPathContextPtr xpathCtx = NULL;
xmlXPathObjectPtr xpathObj = NULL;
assert(xml_path);
assert(xpath);
/* Parse the xml file */
doc = xmlParseFile(xml_path);
if (!doc) {
fprintf(stderr, "ERR parsing: xml file invalid \"%s\"\n", xml_path);
return -1;
}
/* Initialize a xpath context */
xpathCtx = xmlXPathNewContext(doc);
if (!xpathCtx) {
fprintf(stderr, "ERR: XPath context invalid\n");
xmlFreeDoc(doc);
return -1;
}
/* Evaluate xpath expression */
xpathObj = xmlXPathEvalExpression(xpath, xpathCtx);
if (!xpathObj) {
fprintf(stderr, "ERR: invalid xpath expression \"%s\"\n", xpath);
xmlXPathFreeContext(xpathCtx);
xmlFreeDoc(doc);
return -1;
}
/* Print results */
if (print_xpath_nodes(doc, xpathObj->nodesetval, stdout)) {
xmlXPathFreeObject(xpathObj);
xmlXPathFreeContext(xpathCtx);
xmlFreeDoc(doc);
return -1;
}
/* Cleanup */
xmlXPathFreeObject(xpathObj);
xmlXPathFreeContext(xpathCtx);
xmlFreeDoc(doc);
return 0;
}
char *execute_xpath_expression (const char* filename, const xmlChar* xpathExpr, const xmlChar* nsList, int size)
{
xmlDocPtr doc;
xmlXPathContextPtr xpathCtx;
xmlXPathObjectPtr xpathObj;
/* Load XML document */
if(size != 0)
{
doc = xmlParseMemory(filename, size);
}
else
{
doc = xmlParseFile(filename);
}
if (doc == NULL) {
fprintf(stderr, "Error: unable to parse file \"%s\"\n", filename);
return;
}
/* Create xpath evaluation context */
xpathCtx = xmlXPathNewContext(doc);
if(xpathCtx == NULL) {
fprintf(stderr,"Error: unable to create new XPath context\n");
xmlFreeDoc(doc);
return;
}
/* Evaluate xpath expression */
xpathObj = xmlXPathEvalExpression(xpathExpr, xpathCtx);
if(xpathObj == NULL) {
fprintf(stderr,"Error: unable to evaluate xpath expression \"%s\"\n", xpathExpr);
xmlXPathFreeContext(xpathCtx);
xmlFreeDoc(doc);
return;
}
char *content = strdup(print_xpath_nodes(xpathObj->nodesetval));
/* Cleanup */
xmlXPathFreeObject(xpathObj);
xmlXPathFreeContext(xpathCtx);
xmlFreeDoc(doc);
//g_print("\n%s\n%d", content, strlen(content));
return content;
}
/**
* execute_xpath_expression:
* @filename: the input XML filename.
* @xpathExpr: the xpath expression for evaluation.
* @nsList: the optional list of known namespaces in
* "<prefix1>=<href1> <prefix2>=href2> ..." format.
*
* Parses input XML file, evaluates XPath expression and prints results.
*
* Returns 0 on success and a negative value otherwise.
*/
int execute_xpath_expression(const char* filename, const xmlChar* xpathExpr, char **get, int num) {
xmlDocPtr doc;
xmlXPathContextPtr xpathCtx;
xmlXPathObjectPtr xpathObj;
assert(filename);
assert(xpathExpr);
/* Load XML document */
//doc = xmlParseFile(filename);
doc = htmlReadMemory(filename, strlen(filename), NULL, NULL, HTML_PARSE_NOERROR | HTML_PARSE_NOWARNING);
//doc = htmlDocPtr(filename, NULL);
if (doc == NULL) {
fprintf(stderr, "Error: unable to parse this string\n");
return(-1);
}
/* Create xpath evaluation context */
xpathCtx = xmlXPathNewContext(doc);
if(xpathCtx == NULL) {
fprintf(stderr,"Error: unable to create new XPath context\n");
xmlFreeDoc(doc);
return -1;
}
/* Evaluate xpath expression */
xpathObj = xmlXPathEvalExpression(xpathExpr, xpathCtx);
if(xpathObj == NULL) {
fprintf(stderr,"Error: unable to evaluate xpath expression \"%s\"\n", xpathExpr);
xmlXPathFreeContext(xpathCtx);
xmlFreeDoc(doc);
return -1;
}
/* Print results */
int size = print_xpath_nodes(xpathObj->nodesetval, get, num);
/* Cleanup */
xmlXPathFreeObject(xpathObj);
xmlXPathFreeContext(xpathCtx);
xmlFreeDoc(doc);
return size;
}
