调用FCM V1接口发消息遇404（Requested entity was not found）错误求助

错误原因 #

• 请求URL缺失Project ID：你的请求URL中projects/后为空（https://fcm.googleapis.com/v1/projects//messages:send），FCM无法定位到对应Firebase项目，直接返回404 NOT_FOUND。

解决方法 #

1. 补充正确的Project ID到URL
   从serviceAccountKey.json文件中提取project_id字段值，将其填入URL的projects/后，修正后的URL格式如下：

   $url = 'https://fcm.googleapis.com/v1/projects/你的ProjectID/messages:send';
   

2. 验证Project ID与服务账号匹配性
   确保serviceAccountKey.json中的project_id和URL中填入的Project ID完全一致，避免因ID不匹配导致的项目定位失败。

修正后的代码片段 #

// 替换为你的Firebase项目ID
$projectId = 'your-firebase-project-id';
$url = "https://fcm.googleapis.com/v1/projects/{$projectId}/messages:send";

$credentialsFilePath = public_path('assets/json/serviceAccountKey.json');
$client = new \Google_Client();
$client->setAuthConfig($credentialsFilePath);
$client->addScope('https://www.googleapis.com/auth/firebase.messaging');
$token = $client->fetchAccessTokenWithAssertion();
$access_token = $token['access_token'];

$data = [
    'message' => [
        'token' => 'c25j-m60SbKdHZD_uYXihm:APA91bEsuOXz4-xTK0eMJeX_5Wcu7gaD4ci8zZqWSSpKMmhfrrlzndSrGOU7WCmbH56aSMQCL3pTAEkD47UvvTBXOg12FPRMIPSPp2YOiV1ZJA4Gvp_o-yXLl24QNhUlQsuFVOg5cHCQ',
        'notification' => [
            'title' => $options['title'],
            'body' => $options['body'],
        ],
        'data' => [
            'category' => $options['category'],
            'isAction' => $options['isAction'],
            'isSOSActive' => $options['isSOSActive'],
        ],
    ],
];
$encodedData = json_encode($data);

$client = new Client();
$response = $client->request('POST', $url, [
    'headers' => [
        'Authorization' => 'Bearer '.$access_token,
        'Content-Type' => 'application/json',
    ],
    'body' => $encodedData,
    'verify' => true,  // 生产环境需启用SSL验证
]);

内容的提问来源于stack exchange，提问作者anuruddha bandara