如何用go创建xml的CDATA节点？

Question

I have the following struct:

type XMLProduct struct {
    XMLName          xml.Name `xml:"row"`
    ProductId        string   `xml:"product_id"`
    ProductName      string   `xml:"product_name"`
    OriginalPrice    string   `xml:"original_price"`
    BargainPrice     string   `xml:"bargain_price"`
    TotalReviewCount int      `xml:"total_review_count"`
    AverageScore     float64  `xml:"average_score"`
}

And I use the encoding/xml to encode this and then display it on web page.

The ProductName field needs to be enclosed with <![CDATA[]]. But if I write it as <![CDATA[ + p.ProductName + ]]>, the < and > will be translated to < and >.

How can I create the CDATA at minimal cost?

Answer 1

As @Tomalak mentioned, outputting CDATA is not supported.

You can probably write ![CDATA[ as xml tag and later on replace the closing tag from the resulting xml. Will this work for you? Its probably not the one with minimal costs, but easiest. You can of course replace the MarshalIndent call with just the Marshal call in the example below.

http://play.golang.org/p/2-u7H85-wn

package main

import (
    "encoding/xml"
    "fmt"
    "bytes"
)

type XMLProduct struct {
    XMLName          xml.Name `xml:"row"`
    ProductId        string   `xml:"product_id"`
    ProductName      string   `xml:"![CDATA["`
    OriginalPrice    string   `xml:"original_price"`
    BargainPrice     string   `xml:"bargain_price"`
    TotalReviewCount int      `xml:"total_review_count"`
    AverageScore     float64  `xml:"average_score"`
}

func main() {
    prod := XMLProduct{
        ProductId:        "ProductId",
        ProductName:      "ProductName",
        OriginalPrice:    "OriginalPrice",
        BargainPrice:     "BargainPrice",
        TotalReviewCount: 20,
        AverageScore:     2.1}

    out, err := xml.MarshalIndent(prod, " ", "  ")
    if err != nil {
        fmt.Printf("error: %v", err)
        return
    }

    out = bytes.Replace(out, []byte("<![CDATA[>"), []byte("<![CDATA["), -1)
    out = bytes.Replace(out, []byte("</![CDATA[>"), []byte("]]>"), -1)
    fmt.Println(string(out))
}