For this xml response data
<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">
<env:Header/>
<env:Body>
<ns1:postResponse xmlns:ns1="http://example.com/">
<return>
<postDetails>
<title>P</title>
<body>A</body>
</postDetails>
<postResult>
<postId>1234</postId>
</postResult>
<postNumber>1000000</postNumber>
</return>
</ns1:postResponse>
</env:Body>
</env:Envelope>
Only want to get its postId and postNumber. So created a struct as
type PostResponse struct {
PostID string `xml:"postId"`
PostNumber string `xml:"postNumber"`
}
A xmlunmarshal method as
func (r *PostResponse) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
v := struct {
XMLName xml.Name
PostID string `xml:"postId"`
PostNumber string `xml:"postNumber"`
}{}
d.DecodeElement(&v, &start)
r.PostID = v.PostID
r.PostNumber = v.PostNumber
return nil
}
When call it from main function
var postResponse = &PostResponse{}
xml.Unmarshal([]byte(payload), &postResponse)
fmt.Println(postResponse)
It can't set value to the PostResponse object currectly.
The full program on go playground.
https://golang.org/pkg/encoding/xml/#Unmarshal
If the XML element contains a sub-element whose name matches the prefix of a tag formatted as "a" or "a>b>c", unmarshal will descend into the XML structure looking for elements with the given names, and will map the innermost elements to that struct field. A tag starting with ">" is equivalent to one starting with the field name followed by ">".
type PostResponse struct {
PostID string `xml:"Body>postResponse>return>postResult>postId"`
PostNumber string `xml:"Body>postResponse>return>postNumber"`
}