func (document *XmlDocument) Free() {
//must free the xpath context before freeing the fragments or unlinked nodes
//otherwise, it causes memory leaks and crashes when dealing with very large documents (a few MB)
if document.XPathCtx != nil {
document.XPathCtx.Free()
document.XPathCtx = nil
}
//must clear the fragments first
//because the nodes are put in the unlinked list
if document.fragments != nil {
for _, fragment := range document.fragments {
fragment.Remove()
}
}
document.fragments = nil
var p *C.xmlNode
if document.UnlinkedNodes != nil {
for p, _ = range document.UnlinkedNodes {
C.xmlFreeNode(p)
}
}
document.UnlinkedNodes = nil
if document.Ptr != nil {
C.xmlFreeDoc(document.Ptr)
document.Ptr = nil
}
}
func (document *XmlDocument) Free() {
//must clear the fragments first
//because the nodes are put in the unlinked list
if document.fragments != nil {
for _, fragment := range document.fragments {
fragment.Remove()
}
}
document.fragments = nil
var p *C.xmlNode
if document.UnlinkedNodes != nil {
for p, _ = range document.UnlinkedNodes {
C.xmlFreeNode(p)
}
}
document.UnlinkedNodes = nil
if document.XPathCtx != nil {
document.XPathCtx.Free()
document.XPathCtx = nil
}
if document.Ptr != nil {
C.xmlFreeDoc(document.Ptr)
document.Ptr = nil
}
}
func (x *XPathContext) evalXPath(expr *XPathExpression) (*XPathObject, error) {
if expr == nil {
return nil, errors.New("empty XPathExpression")
}
// If there is no document associated with this context,
// then xmlXPathCompiledEval() just fails to match
ctx := x.ptr
if ctx.node != nil && ctx.node.doc != nil {
ctx.doc = ctx.node.doc
}
if ctx.doc == nil {
ctx.doc = C.xmlNewDoc(stringToXmlChar("1.0"))
defer C.xmlFreeDoc(ctx.doc)
}
res := C.xmlXPathCompiledEval(expr.ptr, ctx)
if res == nil {
return nil, errors.New("empty result")
}
return &XPathObject{ptr: res}, nil
}
func ParseHTMLString(content string) (*Document, error) {
d := htmlReadDoc(content, "", "", DefaultHtmlParseFlags)
root, err := C.xmlDocGetRootElement(d)
if err != nil || root == nil {
C.xmlFreeDoc(d)
return nil, err
}
return &Document{ptr: d, root: root}, nil
}
func (d *Document) Free() {
C.xmlFreeDoc(d.ptr)
d.ptr = nil
d.root = nil
}
func closeDoc(doc *C.xmlDoc) {
C.xmlFreeDoc(doc)
}
func XmlFreeDoc(d *C.xmlDoc) {
C.xmlFreeDoc(d)
}
// xmlFreeDoc
func (doc *Document) Free() {
C.xmlFreeDoc(doc.Ptr)
doc.Ptr = nil
doc.Node = nil
}
// Free the libxml2 allocated objects
func (xp *HtmlXp) free() {
C.xmlXPathFreeContext(xp.xpathCtx)
xp.xpathCtx = nil
C.xmlFreeDoc(xp.doc)
xp.doc = nil
}