无需发送消息即可获取GCM规范注册ID [英] Get GCM canonical registration ID without sending a message

问题描述

我使用GCM的应用程序出现问题，情况是这样的：

1. 安装了应用程序


2. 应用程序调用GCM注册方法获取注册IDRID-1


3. 应用程序已卸载


4. 应用程序为再次安装


5. 应用程序再次调用GCM注册方法获取注册IDRID-2

在步骤5中，我需要获取以前的注册ID，以便更新我的模型。

局限性：

- 我尝试在不使用外部存储的情况下执行此操作

- 服务器发送消息时，我无法更新模型，因为创建了新配置文件，所以应在注册后完成在每个新设备的应用程序中

我知道这些信息位于Google服务器中，因为它会在您向旧注册ID发送消息时发送给您。例如，如果我发送消息给RID-1，则在响应中我得到新的（规范）注册ID为RID-2。我需要的是一种在不发送信息的情况下获取此信息的方法。

让我知道您是否需要更多上下文。

---

我发现了几个相关的问题，但答案并不适用于此场景：

GCM注册ID重复

应更新gcm canonical id或不

坚持gcm注册ID

< Google Cloud Messaging - 注册ID状态

Android GCM：如何在我自己的服务器中检测注册的规范ID？

处理Android版Google云消息传递中的注册ID更改

（全部通过@eran ） https://developers.google.com/cloud-messaging/http-server-ref#table1 =noreferrer> dry_run：true 选项 a>在 / send 请求中。

我发现设备不会收到dry_run：true 选项，而服务器获取 canonical_ids 响应。

这是Ruby中的示例代码。您可能需要事先安装 gcm Gem。

$ b

$ gem install gcm $ b

ask_canonical_ids.rb

  require'json'
 
 API_KEY =YourApiKey
 gcm = GCM.new（API_KEY）
 
 registration_ids = [
'OldRegistrationId'，
] 
 
 option = {data：{'message'=> 'Hello Gcm！'}，dry_run：true} 
 response = gcm.send_notification（registration_ids，option）
 
p response [：canonical_ids] 
  

输出 $ ruby​​ ask_canonical_ids.rb （格式化）

  [{
：old => OldRegistrationId，
：new => NewRegistrationId
}] 
  

同样，您的设备也不会收到任何推送通知。 / p>


I have a problem with an app using GCM, the scenario is this:

1. the app is installed
2. the app calls the GCM register method getting the registration id "RID-1"
3. the app is uninstalled
4. the app is installed again
5. the app calls the GCM register method again getting the registration id "RID-2"

In step 5, I need to get the previous registration id so I can update my model.

Limitations:
- I am trying to do this without using the external storage
- I can't update the model when the server sends a message, it should be done after the registration because a new profile is created in the app for each new device

I know that this information is in Google servers because it is sent to you when you send a message to the old registration id. For example, if I send a message to "RID-1", in the response I get that the new (canonical) registration id is "RID-2". What I need is a way to get this information without sending a message.

Let me know if you need more context.

---

I found several related questions but the answers doesn't apply to this scenario:
Registration ID duplication for GCM
gcm canonical id should be updated or not
Persistance of gcm registration id
Google Cloud Messaging - Registration ID status
Android GCM: How to detect registered canonical ids in my own server?
Handling registration ID changes in Google Cloud Messaging on Android
(all answered by @eran)

解决方案

You can specify "dry_run": true option in /send request.

I found that devices do not receive any push notifications with "dry_run": true option, while a server get canonical_ids response.

Here is a sample code in Ruby. You may have to install gcm Gem beforehand.

$ gem install gcm

ask_canonical_ids.rb

require 'gcm'
require 'json'

API_KEY = "YourApiKey"
gcm = GCM.new(API_KEY)

registration_ids = [
  'OldRegistrationId',
]

option = { data: { 'message' => 'Hello Gcm!' }, dry_run: true }
response = gcm.send_notification(registration_ids, option)

p response[:canonical_ids]

output of $ ruby ask_canonical_ids.rb (formatted)

[{
  :old => "OldRegistrationId",
  :new => "NewRegistrationId"
}]

Again, your device will not receive any push notifications.

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