是否可以使用 Firebase Cloud Messaging API 列出所有推送通知？

Question

我正在寻找了解 Firebase FCM API 的范围。我的公司要求我实施自定义 FCM 管理面板。假设，管理员可以使用该面板查看默认 Firebase FCM 发送的所有推送通知、向单个设备发送推送通知或订阅预定义主题。

在构建用于向单个设备发送推送通知的列表视图和基本表单后，我将构建一个后端服务器来自动触发 Firebase API 端点来推送通知。但是，我在 Firebase API 方面遇到了一些麻烦。

1. 是否可以使用 Firebase API 创建 FCM 管理面板？
2. 除了用于 FCM 的 Firebase API 中的send之外，还有其他公共方法吗？

编辑：我构建了一个原型 lambda 函数，它可以根据 Firebase 中存储的规则查询数据库来发送自动推送通知。该功能计划每天运行。通过下面的这个函数，我调用消息传递对象

private void sentAutomatedMessages(List<String> tokens, CardAbandonmentRule rule) {

    for (String token : tokens) {

        //Create Messaging object for every user that fits in this user
        Messaging msgHandler = new Messaging(rule.getTitle(), rule.getMessage(), token);
        try {
            msgHandler.handleSingleDevicePush();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

类定义和发送推送通知的方法=>

public class Messaging {

private static final String PROJECT_ID = "<project_id>";
private static final String BASE_URL = "https://fcm.googleapis.com";
private static final String FCM_SEND_ENDPOINT = "/v1/projects/" + PROJECT_ID + "/messages:send";

private static final String MESSAGING_SCOPE = "https://www.googleapis.com/auth/firebase.messaging";
private static final String[] SCOPES = {MESSAGING_SCOPE};

private String title;
private String message;
private String token;

public Messaging(String title, String message, String token) {
    this.title = title;
    this.message = message;
    this.token = token; // <FCM_token>
}

/**
 * Retrieve a valid access token that can be use to authorize requests to the FCM REST
 * API.
 *
 * @return Access token.
 * @throws IOException
 */
private static String getAccessToken() throws IOException {
    GoogleCredential googleCredential = GoogleCredential
            .fromStream(new FileInputStream("<firebase_private_key.json>"))
            .createScoped(Arrays.asList(SCOPES));
    googleCredential.refreshToken();

    return googleCredential.getAccessToken();
}

/**
 * Create HttpURLConnection that can be used for both retrieving and publishing.
 *
 * @return Base HttpURLConnection.
 * @throws IOException
 */
private static HttpURLConnection getConnection() throws IOException {
    // [START use_access_token]
    URL url = new URL(BASE_URL + FCM_SEND_ENDPOINT);
    HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
    String accessToken = getAccessToken();
    System.out.println(accessToken);
    httpURLConnection.setRequestProperty("Authorization", "Bearer " + accessToken);
    httpURLConnection.setRequestProperty("Content-Type", "application/json; UTF-8");
    return httpURLConnection;
    // [END use_access_token]
}

/**
 * Construct the body of a notification message request.
 *
 * @return JSON of notification message.
 */
private JsonObject buildNotificationMessage() {
    JsonObject jNotification = new JsonObject();
    jNotification.addProperty("title", this.title);
    jNotification.addProperty("body", this.message);

    JsonObject jMessage = new JsonObject();
    jMessage.add("notification", jNotification);
    jMessage.addProperty("token", this.token);


    JsonObject jFcm = new JsonObject();
    jFcm.add("message", jMessage);

    return jFcm;
}

/**
 * Send request to FCM message using HTTP.
 *
 * @param fcmMessage Body of the HTTP request.
 * @throws IOException
 */
private static void sendtoSingleDevice(JsonObject fcmMessage) throws IOException {
    HttpURLConnection connection = getConnection();
    connection.setDoOutput(true);
    DataOutputStream outputStream = new DataOutputStream(connection.getOutputStream());
    outputStream.writeBytes(fcmMessage.toString());
    outputStream.flush();
    outputStream.close();

    int responseCode = connection.getResponseCode();
    if (responseCode == 200) {
        String response = inputstreamToString(connection.getInputStream());
        System.out.println("Message sent to Firebase for delivery, response:");
        System.out.println(response);
    } else {
        System.out.println("Unable to send message to Firebase:");
        String response = inputstreamToString(connection.getErrorStream());
        System.out.println(response);
    }
}

/**
 * Public method to send Push Notification
 *
 * @throws IOException
 */
public void handleSingleDevicePush() throws IOException {
    JsonObject notificationMessage = buildNotificationMessage();
    sendtoSingleDevice(notificationMessage);
}

运行后buildNotificationMessage()，对象形成如下例所示。

// Example Notification Message to send over HTTP
{
  "message": {
    "notification": {
      "title": "title",
      "body": "body"
    },
    "token": "<FCM_token>"
  }
}

响应是=>

{  "name": "projects/<project_id>/messages/1542324302450893"}

我必须开发一个仪表板来列出已发送的消息、打开率和分析。但是，我需要一些指导。

1 - 我可以用FCM REST APIname的响应来做什么？我在文档中没有看到任何用于获取消息详细信息的内容。

2 - 是否有更好的方法为多个唯一的 FCM 令牌发送批量消息？我看到一些有关设备组的内容，但 Firebase 说它有不同的目的。

通常，“组”是指属于单个用户的一组不同设备。

谢谢

Answer 1

火力战士在这里

没有 API 可以获取通过 FCM 发送的所有消息的列表。如果您需要这样的列表，则必须在调用 FCM 发送消息时通过将消息添加到其中来自行创建。