Is there a way to convert XML ([]byte) to JSON output in Golang?
I've got below function where body
is []byte
but I want to transform this XML response to JSON after some manipulation. I've tried Unmarshal
in xml
package with no success:
// POST
func (u *UserResource) authenticateUser(request *restful.Request, response *restful.Response) {
App := new(Api)
App.url = "http://api.com/api"
usr := new(User)
err := request.ReadEntity(usr)
if err != nil {
response.AddHeader("Content-Type", "application/json")
response.WriteErrorString(http.StatusInternalServerError, err.Error())
return
}
buf := []byte("<app version=\"1.0\"><request>1111</request></app>")
r, err := http.Post(App.url, "text/plain", bytes.NewBuffer(buf))
if err != nil {
response.AddHeader("Content-Type", "application/json")
response.WriteErrorString(http.StatusInternalServerError, err.Error())
return
}
defer r.Body.Close()
body, err := ioutil.ReadAll(r.Body)
response.AddHeader("Content-Type", "application/json")
response.WriteHeader(http.StatusCreated)
// err = xml.Unmarshal(body, &usr)
// if err != nil {
// fmt.Printf("error: %v", err)
// return
// }
response.Write(body)
// fmt.Print(&usr.userName)
}
I'm also using Go-restful package
The generic answer to your question of how to convert XML input to JSON output might be something like this:
http://play.golang.org/p/7HNLEUnX-m
package main
import (
"encoding/json"
"encoding/xml"
"fmt"
)
type DataFormat struct {
ProductList []struct {
Sku string `xml:"sku" json:"sku"`
Quantity int `xml:"quantity" json:"quantity"`
} `xml:"Product" json:"products"`
}
func main() {
xmlData := []byte(`<?xml version="1.0" encoding="UTF-8" ?>
<ProductList>
<Product>
<sku>ABC123</sku>
<quantity>2</quantity>
</Product>
<Product>
<sku>ABC123</sku>
<quantity>2</quantity>
</Product>
</ProductList>`)
data := &DataFormat{}
err := xml.Unmarshal(xmlData, data)
if nil != err {
fmt.Println("Error unmarshalling from XML", err)
return
}
result, err := json.Marshal(data)
if nil != err {
fmt.Println("Error marshalling to JSON", err)
return
}
fmt.Printf("%s\n", result)
}
If you need to convert an XML document to JSON with an unknown struct, you can use goxml2json.
Example :
import (
// Other imports ...
xj "github.com/basgys/goxml2json"
)
func (u *UserResource) authenticateUser(request *restful.Request, response *restful.Response) {
// Extract data from restful.Request
xml := strings.NewReader(`<?xml version="1.0" encoding="UTF-8"?><app version="1.0"><request>1111</request></app>`)
// Convert
json, err := xj.Convert(xml)
if err != nil {
// Oops...
}
// ... Use JSON ...
}
Note : I'm the author of this library.
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