FCM网址https://fcm.googleapis.com/fcm/send
Headers 内容类型：application / json身份验证：key =“hjgaj .........”
身体：
将数据发送到FCM服务器就像这样
{
"data" : {
"body" : "great match!",
"title" : "Portugal vs. Denmark",
"content_available" :"true",
"priority" : "high"
}
}
我只得到了回应
至
来自FCM Server
