无法将POST正文绑定到Go中的URL

package main

import (
    "encoding/json"
    "fmt"
    "io/ioutil"
    "log"
    "net/http"
)

type User struct {
    Name  string `json:"name"`
    Email string `json:"email"`
}

func handlePostRequest(w http.ResponseWriter, r *http.Request) {
    if r.Method != http.MethodPost {
        http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
        return
    }

    body, err := ioutil.ReadAll(r.Body)
    if err != nil {
        http.Error(w, "Failed to read request body", http.StatusInternalServerError)
        return
    }

    var user User
    err = json.Unmarshal(body, &user)
    if err != nil {
        http.Error(w, "Failed to parse request body", http.StatusBadRequest)
        return
    }

    // 在这里可以对解析后的数据进行处理
    fmt.Printf("Received user: %+v\n", user)

    // 返回响应
    w.WriteHeader(http.StatusOK)
    fmt.Fprintf(w, "Received user: %+v\n", user)
}

func main() {
    http.HandleFunc("/", handlePostRequest)
    log.Fatal(http.ListenAndServe(":8080", nil))
}