我一直在尝试通过定义结构和使用 xml.Unmarshal 来解析 Go 中的 xml，如下所示:

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
}

没有抛出任何错误，但结构最后总是空的。不明白为什么。

这是 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>

检查一下: https://play.golang.org/p/Irmy8AsUKa

最佳答案

CDATA 不能解码为结构。

• 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.

尝试将 CDATA 解码为结构将失败并出现以下错误

cannot unmarshal into struct 

这个 Playground link解释了上述问题。

结构还有一些其他问题。Go 目前不支持 XML 命名空间前缀。这是一个关于相同的开放问题 https://github.com/golang/go/issues/9519 .

这里是重写的代码

代码

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)

}

这是播放链接:play.golang

关于xml - 使用 Go 解析 XML 时遇到问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42384012/