使用 Pub/Sub 模型在 Ionic 2 中推送通知 [英] Push Notifications in Ionic 2 with the Pub/Sub Model

问题描述

我正在使用 phonegap-plugin-push 插件在Ionic 2 聊天应用程序.

I am using the phonegap-plugin-push plugin to do Push Notifications in an Ionic 2 Chat App.

我已经根据 文档，它可以工作，但只能在同一设备上.即，如果您提供其 device token，它会向手机发送通知.

I've implemented it according to the documentation, and it works, but only on the same device. i.e. it sends a notification to the phone if you supply its device token.

我的问题是关于一个聊天应用，我需要一个 PubSub 模型.这样一个用户可以发布到一个主题，而另一个用户可以订阅该主题，即使他们在不同的设备上.

My issue is for a chat app, I need a PubSub model. So that a user can publish to a topic and another user can subscribe to that topic even if they are on different decices.

查看 文档，它似乎是可能的.请参阅 android.topics 和 ios.topics.

Looking at the documentation, it seems to be possible. See android.topics and ios.topics.

android.topics 数组 [] 可选.如果数组包含一个或多个strings 每个字符串将用于订阅一个 GcmPubSub 主题.

android.topics array [] Optional. If the array contains one or more strings each string will be used to subscribe to a GcmPubSub topic.

所以我尝试以下方法:

Javascript 客户端:

Javascript Client:

发布

    let push = Push.init({
      android: {
        senderID: "xxxxxxxx",
        topics: ['foo']
      },
      ios: {
        alert: "true",
        badge: false,
        sound: "true",
        topics: ['foo']
      },
      windows: {}
    });

push.on('registration', (data) => {
  // call the Java Server
  let promise: Promise<string> = this.notificationService.push(data.registrationId, 'This is a test message from Ionic Chat');
  promise.then((data) => {

  });
});

Java 服务器:

try {
    System.out.println("NotificationService: device_token: "+device_token);
    logger.info("NotificationService: device_token: "+device_token);
    // Prepare JSON containing the GCM message content. What to send and where to send.
    JSONObject jGcmData = new JSONObject();
    JSONObject jData = new JSONObject();
    jData.put("title", "This is title");
    jData.put("message", message);
    jGcmData.put("to", device_token);  // <===== is this the problem???? it is the data.registrationId from the client
    // What to send in GCM message.
    jGcmData.put("data", jData);
    // Create connection to send GCM Message request.
    URL url = new URL("https://gcm-http.googleapis.com/gcm/send");
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestProperty("Authorization", "key=" + API_KEY);
    conn.setRequestProperty("Content-Type", "application/json");
    conn.setRequestMethod("POST");
    conn.setDoOutput(true);
    // Send GCM message content.
    OutputStream outputStream = conn.getOutputStream();
    outputStream.write(jGcmData.toString().getBytes());
} catch (Exception e) {
    e.printStackTrace();
}

Javascript 客户端:

Javascript Client:

订阅

    let push = Push.init({
      android: {
        senderID: "xxxxxxxx",
        topics: ['foo']
      },
      ios: {
        alert: "true",
        badge: false,
        sound: "true",
        topics: ['foo']
      },
      windows: {}
    });

    push.on('notification', (data) => {

    });

它在同一设备上工作，但如果 publisher 和 subscriber 在不同的设备上，它就不起作用.

It works on the same device, but it doesn't work if the publisher and subscriber are on different devices.

我认为问题可能是即使另一个用户订阅了我发布到的主题，它仍然只发布到 data.registrationId(设备令牌).

I think the problem may be that even though another user is subscribed to the topic I publish to, it is still only publishing to the data.registrationId (Device Token).

请参阅 Java 服务器上的以下行:

See the following line on the Java Server:

jGcmData.put("to", device_token);

问题

有谁知道如何将其发送给该主题的所有订阅者?

Does anyone know how to make it send to all subscribers on that topic?

我认为答案是这里:

"to": "/topics/foo-bar",

但是对于多个主题应该如何格式化呢?(这只是一个主题foo-bar)

But how should this be formatted for multiple topics? (that's just one topic foo-bar)

推荐答案

需要更改Java Server发送到主题而不是设备:

Need to Change the Java Server to send to the topic instead of the device:

jGcmData.put("to", "/topics/"+topics);

请参阅:https://developers.google.com/cloud-messaging/

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