// TransformXML parses the XML tree, traverses it and calls TransformFunc
// on each XML token, writing the output to the writer, resulting in a
// transformed XML tree
func TransformXML(decoder *xml.Decoder, encoder *xml.Encoder, fn TransformFunc) error {
parentNodes := &NodeList{}
for {
token, err := decoder.Token()
if err != nil {
if err != io.EOF {
return trace.Wrap(err)
}
break
}
for _, t := range fn(parentNodes, token) {
if err := encoder.EncodeToken(t); err != nil {
return err
}
}
switch e := token.(type) {
case xml.StartElement:
parentNodes.Push(e)
case xml.EndElement:
parentNodes.Pop()
}
}
encoder.Flush()
return nil
}
func NewTree(dec *xml.Decoder) (Node, error) {
var stack []*Element // stack of elements
var result *Element
for {
tok, err := dec.Token()
if err == io.EOF {
break
} else if err != nil {
return nil, err
}
switch tok := tok.(type) {
case xml.StartElement:
newElem := &Element{tok.Name, tok.Attr, []Node{}}
if len(stack) > 0 {
elem := stack[len(stack)-1]
elem.Children = append(elem.Children, newElem)
}
stack = append(stack, newElem)
if result == nil {
result = newElem
}
case xml.EndElement:
stack = stack[:len(stack)-1] // pop
case xml.CharData:
if len(stack) == 0 {
continue
}
elem := stack[len(stack)-1]
elem.Children = append(elem.Children, CharData(tok))
}
}
return result, nil
}
func (x *XmlNode) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
x.Name = getName(start.Name)
x.Attrs = map[string]string{}
for _, attr := range start.Attr {
x.Attrs[getName(attr.Name)] = attr.Value
}
token, err := d.Token()
for token != start.End() {
if err != nil {
return err
}
next, ok := token.(xml.StartElement)
if ok {
child := XmlNode{}
err = child.UnmarshalXML(d, next)
if err != nil {
return err
}
x.Children = append(x.Children, child)
} else {
text, ok := token.(xml.CharData)
if ok {
x.Children = append(x.Children, TextNode(string([]byte(text))))
}
}
token, err = d.Token()
}
return nil
}
func readOptiongroup(attributes []xml.Attr, dec *xml.Decoder) *Optiongroup {
og := &Optiongroup{}
og.ShortDescription = make(map[string]string)
forloop:
for {
t, err := dec.Token()
if err != nil {
break
}
switch v := t.(type) {
case xml.StartElement:
switch v.Name.Local {
case "shortdescription":
lang, text := readShortDescription(v.Attr, dec)
og.ShortDescription[lang] = text
case "classoption":
og.Classoption = append(og.Classoption, readClassoption(v.Attr, dec))
}
case xml.EndElement:
if v.Name.Local == "optiongroup" {
break forloop
}
}
}
return og
}
func readVariant(attributes []xml.Attr, dec *xml.Decoder) Variant {
variant := Variant{}
variant.Description = make(map[string]template.HTML)
for _, attribute := range attributes {
if attribute.Name.Local == "name" {
variant.Name = attribute.Value
}
}
for {
t, err := dec.Token()
if err != nil {
break
}
switch v := t.(type) {
case xml.StartElement:
switch v.Name.Local {
case "argument":
variant.Arguments = append(variant.Arguments, readArgument(v.Attr, dec))
case "description":
lang, text := readDescription(v.Attr, dec)
variant.Description[lang] = text
}
case xml.EndElement:
if v.Name.Local == "variant" {
return variant
}
}
}
return variant
}
func getStructMember(parser *xml.Decoder) (member Struct) {
var token xml.Token
token, _ = parser.Token()
member = Struct{}
for {
switch t := token.(type) {
case xml.StartElement:
if t.Name.Local == "name" {
member["name"], _ = getElementValue(parser)
}
if t.Name.Local == "value" {
member["value"], _ = getValue(parser)
}
case xml.EndElement:
if t.Name.Local == "member" {
return member
}
}
token, _ = parser.Token()
}
return
}
func XMLText(decoder *xml.Decoder) (string, error) {
r := ""
for {
token, err := decoder.Token()
if err == io.EOF {
return r, io.EOF
}
switch token := token.(type) {
case xml.EndElement:
return r, nil
case xml.CharData:
r += string(token)
case xml.StartElement:
sub, err := XMLText(decoder)
r += sub
if err != nil {
return r, err
}
case xml.Comment: // ignore
case xml.ProcInst: // ignore
case xml.Directive: // ignore
default:
panic("unknown token")
}
}
}
func readTaxonLineage(dec *xml.Decoder, tx *taxon) error {
for tk, err := dec.Token(); ; tk, err = dec.Token() {
if err != nil {
return err
}
switch t := tk.(type) {
case xml.StartElement:
if t.Name.Local == "taxon" {
for _, at := range t.Attr {
switch at.Name.Local {
case "taxId":
tx.par = append(tx.par, at.Value)
case "scientificName":
tx.lin = append(tx.lin, at.Value)
}
}
}
case xml.EndElement:
if t.Name.Local != "taxon" {
return nil
}
}
}
}
// UnmarshalXML function unmarshal an <album-list> XML fragment to a Map[string]*Album
func (am *AlbumMap) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
// result
m := map[string]*Album{}
LOOP:
for {
token, err := d.Token()
if err != nil {
return err
}
switch t := token.(type) {
case xml.StartElement:
if t.Name.Local == "album" {
a := Album{}
elmt := xml.StartElement(t)
d.DecodeElement(&a, &elmt)
m[a.ID] = &a
}
case xml.EndElement:
if t.Name.Local == "album-list" {
break LOOP
}
}
}
*am = AlbumMap(m)
return nil
}
func readXmlText(decoder *xml.Decoder) (string, error) {
var context string
for {
token, err := decoder.Token()
if nil != err {
return context, err
}
switch v := token.(type) {
case xml.EndElement:
return context, nil
case xml.CharData:
context = string(v)
case xml.StartElement:
switch v.Name.Local {
case "Datetime":
txt, e := readXmlText(decoder)
if nil != e {
return "", e
}
if e = exitElement(decoder, 0); nil != e {
return txt, e
}
return txt, nil
default:
return context, errors.New("element '" + v.Name.Local + "' is not excepted, excepted is CharData")
}
default:
return context, fmt.Errorf("token '%T' is not excepted, excepted is CharData", v)
}
}
}
func ReadEnvelopeHeader(decoder *xml.Decoder) (string, error) {
var action string
for {
t, err := decoder.Token()
if nil != err {
return "", err
}
switch v := t.(type) {
case xml.EndElement:
return action, nil
case xml.StartElement:
switch v.Name.Local {
case "Action":
action, err = readXmlText(decoder)
if nil != err {
return "", err
}
default:
if e := skipElement(decoder, 0); nil != e {
return "", e
}
}
}
}
}
func (t *Tag) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
t.Name = start.Name
t.Attr = start.Attr
for {
token, err := d.Token()
if err != nil {
if err == io.EOF {
return nil
}
return err
}
switch token.(type) {
case xml.StartElement:
tok := token.(xml.StartElement)
var data *Tag
if err := d.DecodeElement(&data, &tok); err != nil {
return err
}
t.Children = append(t.Children, data)
case xml.CharData:
t.Children = append(t.Children, token.(xml.CharData).Copy())
case xml.Comment:
t.Children = append(t.Children, token.(xml.Comment).Copy())
}
}
return nil
}
func WalkNodePath(dec *xml.Decoder, selector string) (xml.StartElement, error) {
if selector == "" {
return xml.StartElement{}, errors.New("invalid path")
}
splitfront := func(p string) (front string, tail string) {
i := strings.IndexRune(p, '/')
if i >= 0 {
return p[:i], p[i+1:]
}
return p, ""
}
var nextid string
nextid, selector = splitfront(selector)
for {
token, err := dec.Token()
if err != nil {
return xml.StartElement{}, err
}
start, isStart := token.(xml.StartElement)
if isStart && strings.EqualFold(nextid, getAttr(&start, "id")) {
nextid, selector = splitfront(selector)
if nextid == "" {
return start, nil
}
}
}
panic("unreachable")
}
func getNextToken(p *xml.Decoder) (*xmlToken, error) {
tag, err := p.Token()
if tag == nil || err != nil {
return nil, err
}
if tokenMap == nil {
initTokenMap()
}
switch v := tag.(type) {
case xml.StartElement:
tok, err := getTagToken(v.Name.Local)
if err != nil {
return nil, err
}
return &xmlToken{token: tok, isStart: true}, nil
case xml.EndElement:
tok, err := getTagToken(v.Name.Local)
if err != nil {
return nil, err
}
return &xmlToken{token: tok, isStart: false}, nil
case xml.CharData:
return &xmlToken{token: tokenText, text: string(v)}, nil
case xml.ProcInst:
return &xmlToken{token: tokenProcInst}, nil
default:
return nil, fmt.Errorf("Not handling XML token %v (type %T)", v, v)
}
}
// Scan XML token stream to finc next Element (start or end)
func nextElement(p *xml.Decoder) (xml.Token, error) {
for {
t, err := p.Token()
if err != nil {
return xml.StartElement{}, err
}
switch elem := t.(type) {
case xml.StartElement, xml.EndElement:
return t, nil
case xml.CharData:
// https://xmpp.org/rfcs/rfc6120.html#xml-whitespace
// rfc6120, section 1.4: "whitespace" is used to refer to any character
// or characters matching [...] SP, HTAB, CR, or LF.
switch string(elem) {
case " ", "\t", "\r", "\n": //TODO: consider more than one whitespace
log.Println("xmpp: received whitespace ping")
}
case xml.ProcInst:
if !(elem.Target == "xml" && strings.HasPrefix(string(elem.Inst), "version=")) {
log.Printf("xmpp: received unhandled ProcInst element: target=%s inst=%s\n", elem.Target, string(elem.Inst))
}
default:
log.Printf("xmpp: received unhandled element: %#v\n", elem)
}
}
}
func (e *Element) UnmarshalXML(dec *xml.Decoder, start xml.StartElement) error {
buf := new(bytes.Buffer)
enc := xml.NewEncoder(buf)
if err := enc.EncodeToken(start); err != nil {
return err
}
for {
token, err := dec.Token()
if err != nil {
if err == io.EOF {
break
}
return err
}
if err := enc.EncodeToken(token); err != nil {
return err
}
}
if err := enc.Flush(); err != nil {
return err
}
e.Name = start.Name.Local
e.Raw = buf.Bytes()
return nil
}
func (c *choice) UnmarshalXML(dec *xml.Decoder, start xml.StartElement) error {
for {
tok, err := dec.Token()
if err != nil && err == io.EOF {
return nil
}
if err != nil {
return err
}
switch v := tok.(type) {
case xml.StartElement:
switch v.Name.Local {
case "description":
d := &description{}
d.commands = c.commands
dec.DecodeElement(d, &v)
switch d.Lang {
case "en":
c.DescriptionEn = d
case "de":
c.DescriptionDe = d
}
}
}
}
return nil
}
func ReadEvent(decoder *xml.Decoder) (map[string]interface{}, error) {
results := map[string]interface{}{}
for {
t, err := decoder.Token()
if nil != err {
if io.EOF == err {
return results, nil
}
return nil, err
}
switch v := t.(type) {
case xml.EndElement:
return results, nil
case xml.StartElement:
switch v.Name.Local {
case "System":
if err = ReadEventSystemElements(decoder, results); nil != err {
return nil, err
}
case "EventData":
if err = ReadEventDataElements(decoder, results); nil != err {
return nil, err
}
default:
if err = skipElement(decoder, 0); nil != err {
return nil, err
}
}
}
}
}
func getArrayValue(parser *xml.Decoder) (result interface{}, err error) {
var token xml.Token
token, err = parser.Token()
result = []interface{}{}
for {
switch t := token.(type) {
case xml.StartElement:
if t.Name.Local == "value" {
var value interface{}
value, err = getValue(parser)
result = append(result.([]interface{}), value)
}
case xml.EndElement:
if t.Name.Local == "array" {
return result, err
}
}
token, err = parser.Token()
}
return
}
func parsePropertyGroup(decoder *xml.Decoder, element xml.StartElement) (string, string) {
outputPath, scope := "", ""
if condition, ok := getAttrValue(element, "Condition"); ok {
condition = strings.ToLower(condition)
if strings.Contains(condition, "debug") {
scope = "debug"
} else if strings.Contains(condition, "release") {
scope = "release"
} else {
return "", "unknown"
}
}
LOOP:
for {
t, _ := decoder.Token()
if t == nil {
break
}
switch se := t.(type) {
case xml.StartElement:
if se.Name.Local == "OutputPath" {
outputPath = getCharData(decoder)
}
case xml.EndElement:
if se.Name.Local == "PropertyGroup" {
break LOOP
}
}
}
return outputPath, scope
}
func (ccs *CampaignCriterions) UnmarshalXML(dec *xml.Decoder, start xml.StartElement) error {
cc := NegativeCampaignCriterion{}
for token, err := dec.Token(); err == nil; token, err = dec.Token() {
if err != nil {
return err
}
switch start := token.(type) {
case xml.StartElement:
switch start.Name.Local {
case "campaignId":
if err := dec.DecodeElement(&cc.CampaignId, &start); err != nil {
return err
}
case "criterion":
criterion, err := criterionUnmarshalXML(dec, start)
if err != nil {
return err
}
cc.Criterion = criterion
case "BidModifier":
if err := dec.DecodeElement(&cc.BidModifier, &start); err != nil {
return err
}
}
}
}
*ccs = append(*ccs, cc)
return nil
}
func parseReference(decoder *xml.Decoder, element xml.StartElement) *Reference {
referenceName := ""
hintPath := ""
if ref, ok := getAttrValue(element, "Include"); ok {
referenceName = ref
}
LOOP:
for {
t, _ := decoder.Token()
if t == nil {
break
}
switch se := t.(type) {
case xml.StartElement:
if se.Name.Local == "HintPath" {
hintPath = getCharData(decoder)
}
case xml.EndElement:
if se.Name.Local == "Reference" {
break LOOP
}
}
}
if referenceName == "" {
return nil
}
sepIndex := strings.Index(referenceName, ",")
if sepIndex >= 0 {
referenceName = referenceName[:sepIndex]
}
return &Reference{Name: referenceName, Path: hintPath}
}
func readPackageoption(attributes []xml.Attr, dec *xml.Decoder) *Packageoption {
po := &Packageoption{}
po.ShortDescription = make(map[string]string)
for _, attribute := range attributes {
switch attribute.Name.Local {
case "name":
po.Name = attribute.Value
case "default":
po.Default = attribute.Value == "yes"
}
}
forloop:
for {
t, err := dec.Token()
if err != nil {
break
}
switch v := t.(type) {
case xml.StartElement:
switch v.Name.Local {
case "shortdescription":
lang, text := readShortDescription(v.Attr, dec)
po.ShortDescription[lang] = text
}
case xml.EndElement:
if v.Name.Local == "packageoption" {
break forloop
}
}
}
return po
}
// An <xs:annotation> element may contain zero or more <xs:documentation>
// children. The xsd package joins the content of these children, separated
// with blank lines.
func (doc *annotation) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
buf := make([][]byte, 1)
var (
tok xml.Token
err error
)
Loop:
for {
tok, err = d.Token()
if err != nil {
break
}
switch tok := tok.(type) {
case xml.EndElement:
break Loop
case xml.StartElement:
if (tok.Name != xml.Name{schemaNS, "documentation"}) {
if err := d.Skip(); err != nil {
return err
}
}
var frag []byte
if err := d.DecodeElement(&frag, &tok); err != nil {
return err
}
buf = append(buf, bytes.TrimSpace(frag))
}
}
*doc = annotation(bytes.TrimSpace(bytes.Join(buf, []byte("\n\n"))))
return err
}
func readShortDescription(attributes []xml.Attr, dec *xml.Decoder) (string, string) {
var lang string
for _, attribute := range attributes {
if attribute.Name.Local == "lang" {
lang = attribute.Value
}
}
var str string
for {
t, err := dec.Token()
if err != nil {
break
}
switch v := t.(type) {
case xml.CharData:
str += string(v)
case xml.EndElement:
return lang, str
default:
}
}
// never reached!?!?
return lang, str
}
// UnmarshalXML unmarshals UserData XML.
func (u *UserData) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
// Assume that UserData has the same general key-value structure as
// EventData does.
in := struct {
Pairs []KeyValue `xml:",any"`
}{}
// Read tokens until we find the first StartElement then unmarshal it.
for {
t, err := d.Token()
if err != nil {
return err
}
if se, ok := t.(xml.StartElement); ok {
err = d.DecodeElement(&in, &se)
if err != nil {
return err
}
u.Name = se.Name
u.Pairs = in.Pairs
d.Skip()
break
}
}
return nil
}
func (c ChoiceParser) ParseList(d *xml.Decoder, start xml.StartElement, containerPtr interface{}, typeofPtr interface{}, appenderType appender) error {
typeof := reflect.TypeOf(typeofPtr).Elem()
container := reflect.ValueOf(containerPtr).Elem()
token, err := d.Token()
for token != start.End() {
if err != nil {
return err
}
next, ok := token.(xml.StartElement)
if ok {
item, err := c.Parse(d, next)
if err != nil {
return err
}
val := reflect.ValueOf(item)
if !val.Type().Implements(typeof) {
return fmt.Errorf("Item is not a valid %v.", typeof.Name())
}
appendFn := appenders[appenderType]
appendFn(container, val)
}
token, err = d.Token()
}
return nil
}
func extractCombinations(dec *xml.Decoder, terms *[]string) {
prefix := ""
emitted := false
for {
token, err := dec.Token()
if err != nil {
if !emitted && prefix != "" {
*terms = append(*terms, prefix)
}
return
}
if _, isEnd := token.(xml.EndElement); isEnd {
if !emitted && prefix != "" {
*terms = append(*terms, prefix)
}
return
}
if start, isStart := token.(xml.StartElement); isStart {
if start.Name.Local == "indexterm" {
emitted = true
if prefix != "" {
suffix, _ := xmltext(dec)
*terms = append(*terms, prefix+":"+suffix)
}
} else {
panic("unhandled keyword:" + start.Name.Local)
}
}
if data, isData := token.(xml.CharData); isData {
prefix = string(data)
}
}
}
func (nagc *NegativeAdGroupCriterion) UnmarshalXML(dec *xml.Decoder, start xml.StartElement) error {
for token, err := dec.Token(); err == nil; token, err = dec.Token() {
if err != nil {
return err
}
switch start := token.(type) {
case xml.StartElement:
tag := start.Name.Local
switch tag {
case "adGroupId":
if err := dec.DecodeElement(&nagc.AdGroupId, &start); err != nil {
return err
}
case "criterionUse":
if err := dec.DecodeElement(&nagc.CriterionUse, &start); err != nil {
return err
}
case "criterion":
criterion, err := criterionUnmarshalXML(dec, start)
if err != nil {
return err
}
nagc.Criterion = criterion
case "AdGroupCriterion.Type":
break
default:
return fmt.Errorf("unknown NegativeAdGroupCriterion field %s", tag)
}
}
}
return nil
}
func (this *Pair) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
s, err := skipToStart(d)
if err != nil {
return err
}
this.Left = &NameOrPattern{}
if err := this.Left.unmarshalXML(d, *s); err != nil {
return err
}
s, err = skipToStart(d)
if err != nil {
return err
}
this.Right = &NameOrPattern{}
if err := this.Right.unmarshalXML(d, *s); err != nil {
return err
}
for {
t, err := d.Token()
if err != nil {
return err
}
e, ok := t.(xml.EndElement)
if ok && e.Name.Local == start.Name.Local {
break
}
}
return nil
}