http failure during parsing for錯誤

今天使用angular（前端）+golang（后端）進行post，遇到如下錯誤：

http failure during parsing for127.0.0.1
大概意思是：解析時出現錯誤

找了一下帖子，大概原因是數據類型不對應，我的后端的代碼是這樣的

package main

import (
	"net/http"
)
//跨域
func cors(f http.HandlerFunc) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Access-Control-Allow-Origin", "*")  // 允許訪問所有域，可以換成具體url，注意僅具體url才能帶cookie信息
		w.Header().Add("Access-Control-Allow-Headers", "Content-Type,AccessToken,X-CSRF-Token, Authorization, Token") //header的類型
		w.Header().Add("Access-Control-Allow-Credentials", "true") //設置為true，允許ajax異步請求帶cookie信息
		w.Header().Add("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE") //允許請求方法
		w.Header().Set("content-type", "application/json;charset=UTF-8")                  //返回數據格式是json
		if r.Method == "OPTIONS" {
			w.WriteHeader(http.StatusNoContent)
			return
		}
		f(w, r)
	}
}
func index(w http.ResponseWriter, r *http.Request) {
	w.Write([]byte("Hello Golang"))
}
func main() {
	http.HandleFunc("/", cors(index))
	http.ListenAndServe(":8080", nil)
}

注意index()方法，"Hello Golang"並不是json數據
與w.Header().Set("content-type", "application/json;charset=UTF-8") 不一致，
改了后的代碼如下

package main

import (
	"encoding/json"
	"net/http"
)

type Profile struct {
	Name    string
	Hobbies []string
}

func cors(f http.HandlerFunc) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Access-Control-Allow-Origin", "*")                                                            // 允許訪問所有域，可以換成具體url，注意僅具體url才能帶cookie信息
		w.Header().Add("Access-Control-Allow-Headers", "Content-Type,AccessToken,X-CSRF-Token, Authorization, Token") //header的類型
		w.Header().Add("Access-Control-Allow-Credentials", "true")                                                    //設置為true，允許ajax異步請求帶cookie信息
		w.Header().Add("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")                             //允許請求方法
		w.Header().Set("content-type", "application/json;charset=UTF-8")                                              //返回數據格式是json
		if r.Method == "OPTIONS" {
			w.WriteHeader(http.StatusNoContent)
			return
		}
		f(w, r)
	}
}
func index(w http.ResponseWriter, r *http.Request) {
	//w.Write([]byte("Hello Golang"))

	profile := Profile{"Alex", []string{"snowboarding", "programming"}}
	js, err := json.Marshal(profile)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	w.Header().Set("Content-Type", "application/json")
	w.Write(js)

}
func main() {
	http.HandleFunc("/student", cors(index))
	http.ListenAndServe(":8080", nil)
}

成功！
前端能收到數據了。

因為是調試，所以這里前端接受到的數據並沒有意義。