Use case: Android devices cannot contact Ruby On Rails server directly (it is behind firewall) and I cannot have a Internet server to receive requests directly. I need to have internal Rails server to retrieve messages from Android devices and instead of a pooling strategy, I've seen that GCM + XMPP would fit perfectly.
But, I could not find any info on how to code such scenario in Ruby/Rails.
How can I not only send push-notifications from my Ruby On Rails server, but also receive Upstream Messages from GCM (Google Cloud Messaging) connecting my Ruby On Rails server to Google CCS Servers?
- for the Upstream, messages are originated from Android device, that is not the scope of the question
- I know that I must use XMPP for that.
- I know there are ruby gems for sending push-notifications from rails servers to Android devices, but all of them are HTTP based (at least, all that I've seen) and cannot do what I need
- I know that Rails server would keep a connection opened (XMPP) to Google's CCS Servers (GCM Cloud Connection Server) to receive Upstream messages
- I am aware of XMPP4r gem but cannot find code examples enough to integrate it with Rails
Any help is appreciated.
Log (or what I have done so far...)
17/12/15: Trying to use this post as a starting point. I have created a project on google console and added a server API key, also enabled API
Google Cloud Messaging for Android. I have tested with this code (based on this blog post) and, so far, it executes with no errors:require 'stella_gcm_xmpp' id = '[project_number]@gcm.googleapis.com' password = [API_KEY] gcm = StellaGcmXmpp.new(id, password, true, true) gcm.connect gcm.callback
Upstream Message test
Client Side (out of the scope of the question, for completeness sake):
$ ionic start gcm-test
$ ionic platform add android
$ ionic plugin install cordova-plugin-chrome-apps-gcm
$ ionic run android
open Chrome-Dev-Tools console:
> chrome.gcm.register( ['2195xxxxx718'], function(regId) { console.log('regId:' + regId); } )
> regId:APA91bG_5QIpVrBvuooVp7xO...KiVt3ozcf2HKIkHq_42UAPAU4w
> chrome.gcm.send( {destinationId: '2195xxxxx718@gcm.googleapis.com', messageId: '111', timeToLive: 10, data: {my: 'my message'} }, function(messageId) { console.log(messageId); } )
> 8
Server Side
check receive of upstream message on Ruby (irb) console:
D, [2015-12-18T10:09:05.664007 #4019] DEBUG -- : RECEIVED:
<message from='devices@gcm.googleapis.com' to='2195xxxxx718@gcm.googleapis.com' type='normal'><gcm xmlns='google:mobile:data'>{"data":{"my":"my message"},"time_to_live":86400,"from":"APA91bG_5QIpVrBvuooVp7xOos_EYzA4XNH0CeGzVudbJXxW4avE4NpZO84Q3mC2I-FKAGMTfFdGumSGmkUYViZVwp5gbbC38NDS4GWyaIsABJfhZd3J5KMJBLKgah6lC4LwkbLHKiVt3ozcf2HKIkHq_42UAPAU4w","message_id":"8","category":"com.ionicframework.gcmtest908063"}</gcm></message>
D, [2015-12-18T10:09:05.665623 #4019] DEBUG -- : PROCESSING:
<message from='devices@gcm.googleapis.com' to='2195xxxxx718@gcm.googleapis.com' type='normal' xmlns='jabber:client'><gcm xmlns='google:mobile:data'>{"data":{"my":"my message"},"time_to_live":86400,"from":"APA91bG_5QIpVrBvuooVp7xOos_EYzA4XNH0CeGzVudbJXxW4avE4NpZO84Q3mC2I-FKAGMTfFdGumSGmkUYViZVwp5gbbC38NDS4GWyaIsABJfhZd3J5KMJBLKgah6lC4LwkbLHKiVt3ozcf2HKIkHq_42UAPAU4w","message_id":"8","category":"com.ionicframework.gcmtest908063"}</gcm></message> (Jabber::Message)
D, [2015-12-18T10:09:05.665760 #4019] DEBUG -- : TRYING stanzacbs...
D, [2015-12-18T10:09:05.665859 #4019] DEBUG -- : TRYING message/iq/presence/cbs...
[2015-12-18 10:09:05] GCM send Failed id: 8 error:
*The 'GCM send Failed id: 8 error:' occurs not because of an error, but because message-type is empty*
Downstream Message test (out of the scope of the question, for completeness sake)
Client Side
chrome.gcm.onMessage.addListener(function(msg) { console.log('msg: ' + JSON.stringify(msg)) } )
Server Side
gcm.send 'APA91bG_5QIpVrBvuooVp7x...kHq_42UAPAU4w', '999', { msg: 'teste' }
Client Side
msg: {"data":{"msg":"teste"}}
