Meteor implementing Facebook Graph Realtime API

Question

I'm trying to implement the Facebook Realtime API with Meteor. I'm running in the following error - so something seems to be wrong with the callback url. It seems there is a html document returning, but I have no clue at which point this could happen:

[123.45.678.90] Exception while invoking method 'createSubscription' Error: error while subscribing to object page - failed [400] {"error":{"message":"(#2201) response does not match challenge, expected value = '1723842009', received='\u003C!DOCTYPE html>\n\u003Chtm...'","type":"OAuthException","code":2201}}
at subscription (packages/myname:realtime/lib/server/methods.js:37) at Meteor.methods.createSubscription (packages/myname:realtime/lib/server/methods.js:128) at maybeAuditArgumentChecks (packages/ddp/livedata_server.js:1594) at packages/ddp/livedata_server.js:648 at _.extend.withValue (packages/meteor/dynamics_nodejs.js:56) at packages/ddp/livedata_server.js:647 at _.extend.withValue (packages/meteor/dynamics_nodejs.js:56) at _.extend.protocol_handlers.method (packages/ddp/livedata_server.js:646) at packages/ddp/livedata_server.js:546

More information about the Realtime API: https://developers.facebook.com/docs/graph-api/real-time-updates/v2.1

this is globally defined (iron route):

Router.map(function () {

this.route('fbCallbackURL', {
    path: Meteor.settings.fbCallbackPath,
    where: 'server',
    action: function() {
        var req = this.request;
        var res = this.response;

        switch(req.method){
          case "GET" :
                  var hub = req.hub;
                  console.log("got something ...........");

                  if(hub && hub.verify_token === Meteor.settings.fbVerifyString
                         && hub.mode==='subscribe' && hub.challenge){

                    res.writeHead(200, {"content-type": "application/json"});
                    res.end({hub: {challenge: hub.challenge}});
                  }
                  else{
                    res.writeHead(200, {"content-type": "application/json"});
                    res.end({message : "invalid request"});
                  }

                  break;


          case "POST":
                  console.log("todo");

                  break;

          default: console.log("other"); res.writeHead(404); res.end("");
      }

    }
})
});

serverside:

function subscription(object,fields,active){

if(object){
  var url = 'https://graph.facebook.com/'+Meteor.settings.fbAppId+'/subscriptions'),
  res,
  params = {
                  access_token : Meteor.settings.fbAppId + '|' + Meteor.settings.fbAppSecret,
                  callback_url : Meteor.settings.fbAppURL+""+Meteor.settings.fbCallbackPath,
                  verify_token : Meteor.settings.fbVerifyString,
                  object : object,
                  fields : fields
  };

  try {
      HTTP.post(url , { params: params } );

  } catch (err) {
    throw _.extend(
      new Error("error while subscribing to object " + object + " - " + err.message + "   ",{response: err.response}));
  }

  //return res;


}
 else
new Error("subscription for invalid object requested!");
};

Meteor.methods({

createSubscription: function() {
    return subscription("page","name",true);
}


});

on clientside I'm querying:

Meteor.call('createSubscription', function(err, data) {
if (err)
console.log(err);
else
console.log(data);
});

Meteor implementing Facebook Graph Realtime API

0 Answers0