Firebase上游云消息 [英] Firebase upstream cloud messages

问题描述

我使用这个nodeJS 软件包建立了XMPP服务器。我可以发送一个下游消息（从XMPP服务器到设备），但是当我尝试发送上游消息时，服务器很少收到它。

处理上游消息的服务器上的代码是：

  xcs.on（'message'，function（messageId，from，data，category）{
 console.log（Got msg）
 console.log（arguments）
}）; 
  

在android studio中，我使用以下方式发送上游消息：

  public void send（ArrayList< String> messages）{
 System.out.println（Attempting to send）; 
 FirebaseMessaging fm = FirebaseMessaging.getInstance（）; 
 System.out.println（msgId：+ msgId.get（））; 
 RemoteMessage.Builder rm = new RemoteMessage.Builder（SENDER_ID +@ gcm.googleapis.com）
 .setMessageId（Integer.toString（msgId.incrementAndGet（）））; （int i = 0; i< messages.size（）; i ++）{
 rm.addData（String.valueOf（i），messages.get（i））; 
 
 
} 
 
 fm.send（rm.build（））; 
 
 
 
 
 
 
 $ b 
使用print语句我发现send函数确实得到被调用，当我发送时没有错误，但节点服务器什么也没收到。我会注意到服务器SOMETIMES接收到上游消息，但它曾经接近50次尝试。 
 
 
 
以下是我从服务器接收到消息后获得的一些调试器输出，然后尝试发回上游消息：
  V / FA：会话已开始，时间：3115366 
 I / FA：找不到标签管理器，因此不会使用
 D / FA：记录事件（FE）：_s，Bundle [{_ o = auto，_sc = MainActivity，_si = 8922817241262257215}] 
 V / FA：使用测量服务
 V / FA：连接远程服务
 D / FA：连接到远程服务
 V / FA：处理排队服务任务：1 
 V / FA：不活动，断开与服务的连接
 I / System.out：收到的消息：
 I / System.out：Key = TYPE，Value = TEXT 
 I / System.out：Key = ACTION，Value = GET 
 I / System.out：试图发送
  
我不知道问题出在android客户端还是节点服务器上。感谢您的帮助。
 
解决方案
问题在于我使用AWS Lambda托管XMPP服务器，认为我可以将其转换只有当我需要它时。 XMPP服务器需要处于服务器设置（它可以保持开启状态），而不是关闭和打开。细节超越了我。  
I've set up an XMPP server using this nodeJS package. I can send a downstream message (from XMPP server to device) just fine, but when I try to send an upstream message the server rarely ever receives it. 

The code on the server that handles upstream messages is:
xcs.on('message', function(messageId, from, data, category) {
    console.log("Got msg")
    console.log(arguments)
});
In android studio I send an upstream message using:
public void send(ArrayList<String> messages) {
        System.out.println("Attempting to send");
        FirebaseMessaging fm = FirebaseMessaging.getInstance();
        System.out.println("msgId: " + msgId.get());
        RemoteMessage.Builder rm = new RemoteMessage.Builder(SENDER_ID + "@gcm.googleapis.com")
                .setMessageId(Integer.toString(msgId.incrementAndGet()));

        for (int i = 0; i < messages.size(); i++) {
            rm.addData(String.valueOf(i), messages.get(i));
        }

        fm.send(rm.build());

}
Using print statements I see that the send function does indeed get invoked and there are no errors when I send but the node server receives nothing. I'll note that the server SOMETIMES receives the upstream messages but its once in nearly 50 tries. 

Here's some debugger output that I get when I receive a message from the server then attempt to send back an upstream message:
V/FA: Session started, time: 3115366
I/FA: Tag Manager is not found and thus will not be used
D/FA: Logging event (FE): _s, Bundle[{_o=auto, _sc=MainActivity, _si=8922817241262257215}]
V/FA: Using measurement service
V/FA: Connecting to remote service
D/FA: Connected to remote service
V/FA: Processing queued up service tasks: 1
V/FA: Inactivity, disconnecting from the service
I/System.out: Receieved message:
I/System.out: Key = TYPE, Value = TEXT
I/System.out: Key = ACTION, Value = GET
I/System.out: Attempting to send 
I don't know whether the problem is with the android client or the node server. Thanks for any help.
解决方案
The issue was that I was using AWS Lambda to host the XMPP server thinking that I could turn it only when I need it. The XMPP server needs to be in a server setting (where it can stay on) rather than turned off and on. Details are beyond me. 

                        
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