Push Notifications Setup for Parse

Overview

The security model chosen for the open source version of Parse is to require any type of push functionality to be implemented as Parse Cloud code executed only on the server side. Unlike Parse's hosted service, you cannot implement this type of code on the actual client:

// Note: This does NOT work with Parse Server at this time
ParsePush push = new ParsePush();
push.setChannel("mychannel");
push.setMessage("this is my message");
push.sendInBackground();

You will likely see this error in the API response:

{
    "code": 115,
    "error": "Master key is invalid, you should only use master key to send push"
}

Instead, you need to write your own server-side Parse code and have the client invoke it.

Parse Server Setup

The instructions below apply to the open source version of Parse, not hosted Parse.

Obtain GCM Sender ID and API Key

First, you will need to obtain a Google Cloud Messaging Sender ID and API Key. You can follow only step 1 of this guide to obtain the Sender ID (equivalent to the Project Number) and API Key. You do not need to follow the other steps because Parse provides much of code to handle GCM registration for you. Remember the GCM Sender and API key provided.

Update Parse Server Config

Modify your index.js to add support for GCM. See this example:

if (process.env.GCM_SENDER_ID && process.env.GCM_API_KEY) {
   pushConfig['android'] = { 
   senderId: process.env.GCM_SENDER_ID || '',
   apiKey: process.env.GCM_API_KEY || ''};
}

This repo has some additional environment variables configurations added that help facilitate sending push notifications (i.e. see GCM_SENDER_ID, and GCM_API_KEY in index.js). You need to pass this configuration to the instantiation of the Parse server:

var api = new ParseServer({
          // other variables here
              push: pushConfig,
          });

Setup environment variables

If you are using Heroku to configure the server, make sure to set the following environment variables:

• Set GCM_SENDER_KEY and GCM_API_KEY environment variables to correspond to the Sender ID and API Key in the previous step.

  

• Confirm the SERVER_URL environment variable is set to the URL and Parse mount location (i.e. http://yourappname.herokuapp.com/parse).

• Verify that cloud/main.js is the default value of CLOUD_CODE_MAIN environment variable.

Add Parse Cloud Code

Modify cloud/main.js yourself to add custom code to send Push notifications. See these examples for other ways of sending too.

Redeploy Code

Next, redeploy the code. If you are using Heroku, you need to connect your own forked repository and redeploy.

Parse Client Setup

Before getting started, make sure you have Google Play installed on the emulator or device, since push notifications via Google Cloud Messaging (GCM) will only work for devices and emulators that have Google Play installed.

Add GCM Sender ID

Set the GCM Sender ID inside res/values/strings.xml:

<string name="gcm_sender_id">id:1234567</string>

Add a meta-data with the Sender ID in your AndroidManifest.xml.

<application>  
   <!-- Add this INSIDE the application node... -->
   <meta-data android:name="com.parse.push.gcm_sender_id"
              android:value="@string/gcm_sender_id"/>

NOTE: Make sure the id: is used as the prefix (Android treats any metadata value that has a string of digits as an integer so Parse prefixes this value). If you forget this step, Parse will register with its own Sender ID but you will see SenderID mismatch errors when trying to issue push notifications.

Add Push Permissions

Add the necessary permissions to your Android Manifest.xml file. These permissions should live outside the <application> tag:

<manifest package="com.codepath.mapdemo">
  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
  <uses-permission android:name="android.permission.WAKE_LOCK" />
  <uses-permission android:name="android.permission.GET_ACCOUNTS" />
  <uses-permission android:name="android.permission.VIBRATE" />
  <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />

  <!-- ${packageName} is substituted for the package name declared above.  -->
  <permission android:protectionLevel="signature" android:name="${packageName}.permission.C2D_MESSAGE" />
  <uses-permission android:name="${packageName}.permission.C2D_MESSAGE" />

  <!-- These permissions should live outside the application tag -->

  <application>
     <!-- Other stuff here -->        
  </application>
</manifest>

NOTE: The Parse Android SDK permissions are different than those in the official Firebase Cloud Messaging documentation. In particular, the permissions in the manifest file that you need to set are checked by the Parse Android SDK, so you should must use the old permissions as provided. There is still work underway to upgrade the Parse Android SDK to the latest version of Firebase Cloud Messaging (see discussion issue).

Use the ${packageName} instead of specifying the package name yourself. If you mistype this information, push notifications may not be enabled by the Parse Android SDK.

Create a Gcm Broadcast Receiver

You will also need to add a Gcm Broadcast receiver for handling GCM messages in your AndroidManifest.xml file:

<application>
    <receiver android:name="com.parse.GcmBroadcastReceiver"
                  android:permission="com.google.android.c2dm.permission.SEND">
        <intent-filter>
            <action android:name="com.google.android.c2dm.intent.RECEIVE" />
            <action android:name="com.google.android.c2dm.intent.REGISTRATION" />

            <category android:name="${packageName}" />
        </intent-filter>
    </receiver>
</application>

Create a Parse-specific broadcast receiver

Declare a Parse-specific broadcast receiver AndroidManifest.xml file:

<application>
    <service android:name="com.parse.PushService" />
    <receiver android:name="com.parse.ParsePushBroadcastReceiver"
                    android:exported="false">
        <intent-filter>
            <action android:name="com.parse.push.intent.RECEIVE" />
            <action android:name="com.parse.push.intent.DELETE" />
            <action android:name="com.parse.push.intent.OPEN" />
        </intent-filter>
    </receiver>
</application>

• If you use Parse's default ParsePushBroadcastReceiver, using either alert or title as a key/value pair will trigger a notification message. See this section of the Parse documentation.

• You can also create your own custom receiver as shown in this example.

• In addition, you can programmatically register for broadcast notifications by creating an intent filter and registering the receiver:

IntentFilter intentFilter = new IntentFilter("com.parse.push.intent.RECEIVE");
registerReceiver(new MarkerUpdatesReceiver(this), intentFilter);

Executing Parse Cloud Functions

Assuming the function is named pushChannelTest, modify your Android code to invoke this function by using the callFunctionInBackground() call. Any parameters should be passed as a HashMap:

HashMap<String, String> test = new HashMap<>();
test.put("channel", "testing");

ParseCloud.callFunctionInBackground("pushChannelTest", test);

Save GCM Token

Make sure to register the GCM token to the server:

Parse.initialize(...);

// Need to register GCM token
ParseInstallation.getCurrentInstallation().saveInBackground();

Subscribing to Channels

If you wish to subscribe to certain channels, you can call this command:

public class MapDemoActivity extends AppCompatActivity {
    final String CHANNEL_NAME = "abcd";

    @Override
    public void onCreate() {

      // make sure Parse has been initialized
      ParsePush.subscribeInBackground(CHANNEL_NAME);
    }
}

Receiving Pushes on Android

After following the steps outlined above, be sure to check out the following resources for more information:

• ParsePlatform Push Docs
• ParsePlatform Push QuickStart
• CodePath Parse Push Example

Refer to these resources for more information on Parse Server push.

Troubleshooting

• If you are using Facebook's Stetho library with your Android client, you can see the LogCat statements and verify that GCM tokens are being registered by API calls to the /parse/classes/_Installation endpoint:

: Url : http://192.168.3.116:1337/parse/classes/_Installation

You should be able to se the deviceToken, installationId, and appName registered:

03-02 03:17:27.859 9362-9596/com.test I/ParseLogInterceptor:
Body : {
   "pushType": "gcm",
   "localeIdentifier": "en-US",
   "deviceToken": XXX,
   "appVersion": "1.0",
   "deviceType": "android",
   "appIdentifier": "com.test",
   "installationId": "XXXX",
   "parseVersion": "1.13.1",
   "appName": "PushNotificationDemo",
   "timeZone": "America\/New_York"
}

• Make sure you are on latest open source Parse version: You will want to verify what version is set in your package.json file (i.e. https://github.com/ParsePlatform/parse-server-example/blob/master/package.json#L15). Make sure to update this file and redeploy.

• If GCM is fully setup, your app if properly configured should register itself with your Parse server. Check your _Installation table to verify that the entries were being saved. Clear your app cache or uninstall the app if an entry in the _Installation table hasn't been added.

• Inside your AndroidManifest.xml definition within the application node, make sure your gcm_sender_id is prefixed with id: (i.e. id:123456). Parse needs to begin with an id: to work correctly.

  • Make sure to add the GCM metadata inside of the <application> node or this won't be picked up properly.

• You can use this curl command with your application key and master key to send a push to all Android devices:

 curl -X POST -H "X-Parse-Application-Id: myAppId" -H "X-Parse-Master-Key: myMasterKey" \
-H "Content-Type: application/json" \
-d '{"where": {"deviceType": "android"}, "data": {"action": "com.example.UPDATE_STATUS", "newsItem": "Man bites dog", "name": "Vaughn", "alert": "Ricky Vaughn was injured during the game last night!"}}' \
https://parse-testing-port.herokuapp.com/parse/push/

• Use heroku logs --app <app_name> to see what is happening on the server side:

2016-03-03T09:26:50.032609+00:00 app[web.1]: #### PUSH OK

If you see Can not find sender for push type android, it means you forgot to set the environment variables GCM_SENDER_ID and GCM_API_KEY.

• Make sure you have not included com.google.android.gms:play-services-gcm:8.4.0 in your Gradle configuration. Parse's Android SDK library already includes code to deal with the GCM registration.

• Verify that you have all the permissions for GCM setup in your AndroidManifest.xml file and that you have the correct receivers configured.