我对 go 语言还比较陌生。
我在尝试解组 soap 消息时遇到问题。我的尝试是抽象 body 元素的内容并避免静态定义 xml 结构,因为它会根据请求的操作而变化。 不幸的是我找不到正确的方法。在示例中,getcontent 函数应接收指向包含内容的结构的指针,并将其动态添加到 body 中,以便进行填充。但结果并不是预期的。
package main
import (
"encoding/xml"
"fmt"
)
type Message interface{}
type EnvelopeResponse struct {
XMLName xml.Name `xml:"http://schemas.xmlsoap.org/soap/envelope/ Envelope"`
Body Message `xml:"http://schemas.xmlsoap.org/soap/envelope/ Body"`
}
type Body struct {
XMLName xml.Name `xml:"http://schemas.xmlsoap.org/soap/envelope/ Body"`
Fault *Fault `xml:",omitempty"`
Content Message `xml:",omitempty"`
SOAPBodyContentType string `xml:"-"`
}
type Fault struct {
XMLName xml.Name `xml:"http://schemas.xmlsoap.org/soap/envelope/ Fault"`
Code string `xml:"faultcode,omitempty"`
String string `xml:"faultstring,omitempty"`
Actor string `xml:"faultactor,omitempty"`
Detail string `xml:"detail,omitempty"`
}
type GetHostNumberOfEntriesResponse struct {
XMLName xml.Name `xml:"urn:dslforum-org:service:Hosts:1 GetHostNumberOfEntriesResponse"`
NewHostNumberOfEntries int64 `xml:"NewHostNumberOfEntries"`
}
func GetContent(rawXml []byte, content interface{}) {
envelope := EnvelopeResponse{Body: Body{Content: content}}
xml.Unmarshal(rawXml, &envelope)
}
func main() {
b := []byte(`
<?xml version="1.0"?>
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<s:Body>
<u:GetHostNumberOfEntriesResponse xmlns:u="urn:dslforum-org:service:Hosts:1">
<NewHostNumberOfEntries>47</NewHostNumberOfEntries>
</u:GetHostNumberOfEntriesResponse>
</s:Body>
</s:Envelope>
`)
content := &GetHostNumberOfEntriesResponse{}
GetContent(b, content)
fmt.Println(*content)
}
这是操场上的示例:
https://go.dev/play/p/bbr4vexipbc
正确答案
我找到的解决方案是使用泛型来表示主体的变量和参数化内容。
此代码按我的预期工作:
package main
import (
"encoding/xml"
"fmt"
)
type EnvelopeResponse[T any] struct {
XMLName xml.Name `xml:"http://schemas.xmlsoap.org/soap/envelope/ Envelope"`
Body Body[T] `xml:"http://schemas.xmlsoap.org/soap/envelope/ Body"`
}
type Body[T any] struct {
XMLName xml.Name `xml:"http://schemas.xmlsoap.org/soap/envelope/ Body"`
Fault *Fault `xml:",omitempty"`
Content T `xml:",omitempty"`
SOAPBodyContentType string `xml:"-"`
}
type Fault struct {
XMLName xml.Name `xml:"http://schemas.xmlsoap.org/soap/envelope/ Fault"`
Code string `xml:"faultcode,omitempty"`
String string `xml:"faultstring,omitempty"`
Actor string `xml:"faultactor,omitempty"`
Detail string `xml:"detail,omitempty"`
}
type GetHostNumberOfEntriesResponse struct {
XMLName xml.Name `xml:"urn:dslforum-org:service:Hosts:1 GetHostNumberOfEntriesResponse"`
NewHostNumberOfEntries int64 `xml:"NewHostNumberOfEntries"`
}
func GetContent[T any](rawXml []byte, content T) {
envelope := EnvelopeResponse[T]{Body: Body[T]{Content: content}}
xml.Unmarshal(rawXml, &envelope)
}
func main() {
b := []byte(`
<?xml version="1.0"?>
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<s:Body>
<u:GetHostNumberOfEntriesResponse xmlns:u="urn:dslforum-org:service:Hosts:1">
<NewHostNumberOfEntries>47</NewHostNumberOfEntries>
</u:GetHostNumberOfEntriesResponse>
</s:Body>
</s:Envelope>
`)
content := &GetHostNumberOfEntriesResponse{}
GetContent(b, content)
fmt.Println(*content)
}