package utils

import (
	"bytes"
	"io/ioutil"
	"net/http"
)

func Post(url, data string) (string, error) {
	reader := bytes.NewReader([]byte(data))

	request, err := http.NewRequest("POST", url, reader)
	if err != nil {
		return "", err
	}
	defer request.Body.Close() //程序在使用完回复后必须关闭回复的主体
	request.Header.Set("Content-Type", "application/json;charset=UTF-8")
	//必须设定该参数,POST参数才能正常提交，意思是以json串提交数据

	client := http.Client{}
	resp, err := client.Do(request) //Do 方法发送请求，返回 HTTP 回复
	if err != nil {
		return "", err
	}

	respBytes, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		return "", err
	}

	//byte数组直接转成string，优化内存
	// str := (*string)(unsafe.Pointer(&respBytes))
	return string(respBytes), nil
}