the-way-to-go_ZH_CN/eBook/examples/chapter_15/twitter_status.go

// twitter_status.go
package main

import (
	"net/http"
	"fmt"
	"encoding/xml"
	"io/ioutil"
)
/* these structs will house the unmarshalled response. 
   they should be hierarchically shaped like the XML 
   but can omit irrelevant data. */
type Status struct {
	Text string
}

type User struct {
	XMLName xml.Name
	Status  Status
}
// var user User

func main() {
	// perform an HTTP request for the twitter status of user: Googland  
	resp, _ := http.Get("http://twitter.com/users/Googland.xml")
	// initialize the structure of the XML response  
	user := User{xml.Name{"", "user"}, Status{""}}
	// unmarshal the XML into our structures 
	defer resp.Body.Close()
	if body, err := ioutil.ReadAll(resp.Body); err != nil {
			fmt.Printf("error: %s", err.Error())
	} else {
			fmt.Printf("%s ---", body)
			xml.Unmarshal(body, &user)
	}
	fmt.Printf("name: %s ", user.XMLName)
	fmt.Printf("status: %s", user.Status.Text)
}
/* Output:
status: Robot cars invade California, on orders from Google: Google has been testing self-driving cars ... http://bit.ly/cbtpUN http://retwt.me/97p<exit code="0" msg="process exited normally"/>
After Go1: no output: name: { user} status:
*/