常规使用

package main

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

func SendMessage() error {
	channelCode := "4d2dac865118761a14d10d7d3afe7c35"
	message1 := make(map[string]interface{})
	message1["head"] = "测试标题"
	message1["body"] = "测试内容"
	bytesData, err := json.Marshal(message1)
	if err != nil {
		fmt.Println(err.Error() )
		return nil
	}
	reader := bytes.NewReader(bytesData)
	url := fmt.Sprintf("https://www.phprm.com/services/push/send/%s", channelCode)
	request, err := http.NewRequest("POST", url, reader)
	if err != nil {
		fmt.Println(err.Error())
		return nil
	}
	request.Header.Set("Content-Type", "application/json;charset=UTF-8")
	client := http.Client{}
	resp, err := client.Do(request)
	if err != nil {
		fmt.Println(err.Error())
		return nil
	}
	respBytes, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		fmt.Println(err.Error())
		return nil
	}
	str := (*string)(unsafe.Pointer(&respBytes))
	fmt.Println(*str)
	return nil
}

func main() {
	SendMessage()
}