我已经成功完成了以下步骤

>在服务人员初始化
>在Google Developers Console上创建一个项目
>添加了一个清单
>使用PHP CURL发送

这是我的CURL命令

$url = 'https://android.googleapis.com/gcm/send';
$msg="hi";
$data = array('title'=> $msg,'message'=>'Hello');
$regids= // added regids;
$fields = array('to' => $regids,'data' => $data);
$headers = array( 'Authorization: My auth key','Content-Type: application/json');

$ch = curl_init();

curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_POST,true);
curl_setopt($ch,CURLOPT_HTTPHEADER,$headers);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,CURLOPT_SSL_VERIFYPEER,false);
curl_setopt($ch,CURLOPT_POSTFIELDS,json_encode($fields));

print_r(json_encode($fields));
$result=curl_exec($ch);
echo $result; 
if($result==FALSE)
{
    die('Curl Failed');
}
curl_close($ch);

一切正常,我可以使用以下代码显示默认通知

self.addEventListener('push',function(event) {
  console.log('Push message',event);
  var title = 'Push message';
  event.waitUntil(
    self.registration.showNotification(title,{
      body: 'The Message',icon: 'images/icon.png',tag: 'my-tag'
    }));
});

但是我需要的是显示通过CURL命令发送的通知消息(在应用程序中我们可以轻松地做到这一点)

我收到以下代码来接收推送通知(google)

self.addEventListener('push',function(event) {  
  // Since there is no payload data with the first version  
  // of push messages,we'll grab some data from  
  // an API and use it to populate a notification  
  event.waitUntil(  
    fetch(SOME_API_ENDPOINT).then(function(response) {  
      if (response.status !== 200) {  
        // Either show a message to the user explaining the error  
        // or enter a generic message and handle the
        // onnotificationclick event to direct the user to a web page  
        console.log('Looks like there was a problem. Status Code: ' + response.status);  
        throw new Error();  
      }

      // Examine the text in the response  
      return response.json().then(function(data) {  
        if (data.error || !data.notification) {  
          console.error('The API returned an error.',data.error);  
          throw new Error();  
        }  

        var title = data.notification.title;  
        var message = data.notification.message;  
        var icon = data.notification.icon;  
        var notificationTag = data.notification.tag;

        return self.registration.showNotification(title,{  
          body: message,icon: icon,tag: notificationTag  
        });  
      });  
    }).catch(function(err) {  
      console.error('Unable to retrieve data',err);

      var title = 'An error occurred';
      var message = 'We were unable to get the information for this push message';  
      var icon = URL_TO_DEFAULT_ICON;  
      var notificationTag = 'notification-error';  
      return self.registration.showNotification(title,tag: notificationTag  
        });  
    })  
  );  
});

它总是显示

We were unable to get the information for this push message

该代码中提到的SOME_API_ENDPOINT是什么？
我尝试使用https://android.googleapis.com/gcm/send而不是端点,并且在服务工作者中使用用户端点但不工作.

任何帮助深表感谢