How to parse Soap Envelope in Golang ?

Question

I am new to golang and Soap and having trouble in parsing soap msg.

1.I have an Soap message

<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/">
<soap:Body>
<activationPack_completeResponse"http://tempuri.org/">
<activationPack_completeResult xsi:type="xsd:string">Active</activationPack_completeResult>
</activationPack_completeResponse>
</soap:Body>
</soap:Envelope>

Now how should i Unmarshal them in golang what should be my struct declaration for tag Soap Envelope.

I have some structure as below:

type MyRespEnvelope struct {
    XMLName xml.Name `xml:"http://schemas.xmlsoap.org/soap/envelope/ Envelope"`
    Soap    *Body
}
type Body struct {
    XMLName     xml.Name `xml:"http://schemas.xmlsoap.org/soap/envelope/ Body"`
    GetResponse *ActivationPack_CompleteResponse
}
type ActivationPack_CompleteResponse struct {
    XMLName xml.Name `xml:"activationPack_completeResponse"`
    Id      string   `xml:"xmlns,attr"`
    MyVar   string   `xml:"activationPack_completeResult"`
} 

But I am getting error as below:

error: expected element <Envelope> in name space http://schemas.xmlsoap.org/soap/envelope/ but have soap*stopped,reason="end-stepping-range",frame={addr="0x0000000000401211",func="main.UnmarshalFirstDitto",args=[{name="data",value="\"\\nNotice: Undefined variable: area in /var/www/nusoap/dittotv.php on line 25\\n\\nNotice: Undefined variable: area in /var/www/nusoap/dittotv.php on line 27\\n\\nNotice: Undefined variable: area in /var/www/nu\"..."}],file="/media/winshare/Golang/WorkSpace/src/DittoTv/ditto.go",fullname="/media/winshare/Golang/WorkSpace/src/DittoTv/ditto.go",line="60"},thread-id="1",stopped-threads="all",core="0"

So someone please tell me how should i declare my structure so that i am able to parse the soap message.

Answer 1

1. Your XML was malformed, I assume it's a bad copy-paste. I corrected it, line 4: <activationPack_completeResponse"http://tempuri.org/"> -> <activationPack_completeResponse Id="http://tempuri.org/">

2. Your types were wrong. in MyRespEnvelopeyou call the Body struct Soap. Without defining its xml name you're not going to get anything. An easier fix is to change the name from Soap to Body.

3. I'm not an expert in XML, but I think you were doing something wrong with namespaces. simplifying your types a little, here is a working example: http://play.golang.org/p/957GWzfdvN

   package main
   
   import "fmt"
   import "encoding/xml"
   
   type MyRespEnvelope struct {
       XMLName xml.Name
       Body    Body
   }
   
   type Body struct {
       XMLName     xml.Name
       GetResponse completeResponse `xml:"activationPack_completeResponse"`
   }
   
   type completeResponse struct {
       XMLName xml.Name `xml:"activationPack_completeResponse"`
       Id      string   `xml:"Id,attr"`
       MyVar   string   `xml:"activationPack_completeResult"`
   }
   
   func main() {
   
       Soap := []byte(`<?xml version="1.0" encoding="UTF-8"?>
   <soap:Envelope SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/">
   <soap:Body>
   <activationPack_completeResponse Id="http://tempuri.org/">
   <activationPack_completeResult xsi:type="xsd:string">Active</activationPack_completeResult>
   </activationPack_completeResponse>
   </soap:Body>
   </soap:Envelope>`)
   
       res := &MyRespEnvelope{}
       err := xml.Unmarshal(Soap, res)
   
       fmt.Println(res.Body, err)
   }
   

   Note: In the code I put together, I don't use pointer to structs but the structs themselves. You can use either depending on how you're intending to use it, and your preferences I guess.