Go net/http获取body中json格式数据

package main
 
import (
    "encoding/json"
    "fmt"
    "io/ioutil"
    "net/http"
)
 
type AutotaskRequest struct {
    RequestID string     `json:"requestid"`
    Clone     CloneModel `json:"clone"`
    Push      PushModel  `json:"push"`
}
 
type CloneModel struct {
    //TODO
    //"Method": string `json:"ceph"`
    RequestID   string `json:"requestid"`
    CallbackURL string `json:"callbackurl"`
}
 
type PushModel struct {
    RequestID   string `json:"requestiD"`
    CallbackURL string `json:"callbackuRL"`
    IP          string `json:"remoteip"`
    Port        int    `json:"remoteport"`
    User        string `json:"user"`
}
 
func test(w http.ResponseWriter, r *http.Request) {
    // r.ParseForm()
    defer fmt.Fprintf(w, "ok\n")
 
    fmt.Println("method:", r.Method)
    body, err := ioutil.ReadAll(r.Body)
    if err != nil {
        fmt.Printf("read body err, %v\n", err)
        return
    }
    println("json:", string(body))
 
    var a AutotaskRequest
    if err = json.Unmarshal(body, &a); err != nil {
        fmt.Printf("Unmarshal err, %v\n", err)
        return
    }
    fmt.Printf("%+v", a)
 
}
 
func main() {
    http.HandleFunc("/test", test)
    http.ListenAndServe(":8888", nil)
}

　　客户端所传递参数如下：

{
    "requestid": "xxxxx",
    "clone": {
        "method": "ceph",
        "callbackurl": "xxx",
        "remoteip": "192.168.2.1",
        "remoteport": 8080,
        "user": "xxx",
        "pass": "xxx",
        "path": "xxx",
        "filename": "xxx"
    },
    "optimize": {
        "callbackurl": "xxx",
        "filter": {
            "k1": true,
            "k2": false
        },
        "trim": true,
        "progressive": true,
        "quality": 100,
        "colorNum": 256,
        "gifOptLevel": 2,
        "svgo": true,
        "guetzli": false,
        "css_rewrite": false,
        "js_rewrite": false
    },
    "push": {
        "method": "ceph",
        "callbackurl": "xxx",
        "remoteip": "192.168.2.1",
        "remoteport": 8080,
        "user": "xxx",
        "pass": "xxx",
        "path": "xxx",
        "filename": "xxx"
    }
}