Reputation: 88
I've been trying to parse an xml in Go by defining structs and using xml.Unmarshal like this:
type InitiateResponse struct {
SoapenvEnvelope struct {
SoapenvBody struct {
ReqResponseMsg struct {
CData struct {
Response struct {
ResponseCode string `xml:"ResponseCode"`
ConversationID string `xml:"ConversationID"`
ResponseDesc string `xml:"ResponseDesc"`
OriginatorConversationID string `xml:"OriginatorConversationID"`
ServiceStatus string `xml:"ServiceStatus"`
} `xml:"req:Response"`
} `xml: ![CDATA[`
} `xml:"req:ResponseMsg"`
} `xml:"soapenv:Body"`
} `xml:"soapenv:Envelope"`
}
var unit InitiateResponse
if err := xml.Unmarshal([]byte(data), &unit); err != nil {
fmt.Println(err)
return
}
There's no error thrown but the struct is always empty at the end. Can't understand why.
This is the xml:
<?xml version='1.0' encoding='UTF-8'?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:req="http://cps.huawei.com/cpsinterface/request">
<soapenv:Header />
<soapenv:Body>
<req:ResponseMsg><![CDATA[<?xml version="1.0" encoding="UTF-8"?><Response><ResponseCode>14</ResponseCode><ConversationID>AG_20170222_000040cdc5cecf730e39</ConversationID><ResponseDesc>The caller information is invalid.</ResponseDesc><OriginatorConversationID>S_X2013012921001</OriginatorConversationID><ServiceStatus>2</ServiceStatus></Response>]]></req:ResponseMsg>
</soapenv:Body>
</soapenv:Envelope>
Check it out: https://play.golang.org/p/Irmy8AsUKa
Upvotes: 1
Views: 1548
Reputation: 7101
CDATA can not be unmarshalled to a struct.
- If the XML element contains character data, that data is accumulated in the first struct field that has tag ",chardata". The struct field may have type []byte or string. If there is no such field, the character data is discarded.
An attempt to unmarshal CDATA to struct will fail with following error
cannot unmarshal into struct
This playground link explains the above mentioned problem.
There were some other issues with the struct.Go currently does not support XML namespace prefixes
.Here is an open issue regarding the same https://github.com/golang/go/issues/9519.
Here is code re-written
Code
package main
import (
"encoding/xml"
"fmt"
)
const data = `<soapenv:Envelope>
<soapenv:Body>
<req:ResponseMsg>
<name>blah</name>
<![CDATA[<?xml version="1.0" encoding="UTF-8"?><Response><ResponseCode>14</ResponseCode><ConversationID>AG_20170222_00006f8794f700eff099</ConversationID><ResponseDesc>The caller information is invalid.</ResponseDesc><OriginatorConversationID>S_X2013012921001</OriginatorConversationID><ServiceStatus>2</ServiceStatus></Response>]]>
</req:ResponseMsg>
</soapenv:Body>
</soapenv:Envelope>`
type Envelop struct {
XMLName xml.Name `xml:"Envelope"`
ResponseMsg struct {
CDATA []byte `xml:",cdata"`
} `xml:"Body>ResponseMsg"`
}
type Response struct {
XMLName xml.Name `xml:"Response"`
ResponseCode string `xml:"ResponseCode"`
ConversationID string `xml:"ConversationID"`
ResponseDesc string `xml:"ResponseDesc"`
OriginatorConversationID string `xml:"OriginatorConversationID"`
ServiceStatus string `xml:"ServiceStatus"`
}
func main() {
var unit Envelop
if err := xml.Unmarshal([]byte(data), &unit); err != nil {
fmt.Println(err)
return
}
responseBytes := unit.ResponseMsg.CDATA
var response Response
if err := xml.Unmarshal([]byte(responseBytes), &response); err != nil {
fmt.Println(err)
return
}
fmt.Println("Response : ", response)
}
Here is the play link : play.golang
Upvotes: 4