Golang encoding/xml
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go's builtin library for parsing xml.
See also: golang encoding, xml
A more detailed introduction to go's encoding interface can be seen in golang encoding/json.
NOTE:
Golang's builtin xml library does not support the full xml spec.
Confirm your needs are supported before using it
Documentation
official docs https://pkg.go.dev/encoding/xml@go1.18.3
Tutorials
tutorialedge https://tutorialedge.net/golang/parsing-xml-with-golang/
Struct Tags
See full details here
type User struct { Name `xml:"Name"` // <User><Name>value</Name></User> Color `xml:"color,attr"` // <User color="value"></User> Skip `xml:"-"` // <User></User> }Known issues:
- xml namespaces are not supported https://github.com/golang/go/issues/11496
- schema validation does not appear to be supported
Serializing
type User struct { Id int `xml:"id"` Name string `xml:"name,attr"` } func main() { user := User{123, "will"} bytes, _ := xml.Marshal(&user) fmt.Println(string(bytes)) // <User name="will"><id>123</id></User> }
Deserialization
Basics
type User struct { Id int `xml:"id"` Name string `xml:"name,attr"` } func main() { user := User{123, "will"} bytes, _ := xml.Marshal(&user) fmt.Println(string(bytes)) // <User name="will"><id>123</id></User> }Non-Homogenous XML
XML is generally not homogenous.
Record each possible sub-element as a field on your object.
If an element can occur multiple times, declare it as an array.
You can ignore elements by not defining fields for them.encoded := ` <mediawiki> <siteinfo> abc </siteinfo> <page> <title>Main Page</title> </page> <page> <title>Linux</title> </page> </mediawiki> ` type Result struct { XMLName xml.Name `xml:"mediawiki"` // root node SiteInfo string `xml:"siteinfo"` // only one 'siteinfo' element under 'mediawiki' Page []Page `xml:"page"` // multiple 'page' elements under 'mediawiki' } type Page struct { Title string `xml:"title"` } var result Result xml.Unmarshall([]byte(encoded), &result) fmt.Println(result.Page[0].Title.Text) // LinuxCustom Deserializers
TODO:
finish
func (revision *Revision) UnmarshalXML(d *xml.Decoder, start xml.Startelement) error { return nil }