xml Unmarshal innerXml及其属性

Question

I want to Unmarshal the innerXml and its attributes. I write a Unmarshal function to implement this, but it looks like the function is in an infinite loop. The error information is

runtime: goroutine stack exceeds 1000000000-byte limit 
fatal error: stack overflow

The example is here.

I don't know why this happens. Could someone help me, thanks.

Update1: Thanks Ainar-G. I tried his example. It works as get the innerXml as chardata which I did't find. If I change the example as this, the result is empty, it should include all the raw xml in .

Update2: I find a solution, but may be a little wordy. code.

Answer 1

In your UnmarshalXML method you call xml.(*Decoder).DecodeElement, which in turn calls UnmarshalXML, etc. This creates the infinite loop. Either create a wrapper struct, or unmarshal only a part of your struct in your UnmarshalXML.

EDIT: if you want to unmarshal all attributes of a node, see the example in this answer.

Working example:

func (in *innerXml) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
    in.XMLName = start.Name
    in.Attrs = make(map[string]string)
    for _, attr := range start.Attr {
        in.Attrs[attr.Name.Local] = attr.Value
    }

    err := d.DecodeElement(&in.Value, &start)
    if err != nil {
        return err
    }

    return nil
}

Playground: http://play.golang.org/p/TLcqFSyn94