timrijckaert/README.md

## README.md

      
    Raw
  

              README.md
            
          
    Firebase Topic Counter

This little script will output the amount of tokens subscribed to a topic.

You will need to replace the variables with your personal ones in order for it to work.
We used this function in a Lambda which sends the results to a monitoring dashboard.
How to get the variables

Screenshots in the comments.


Go to the Firebase Console.


Under Grow click Cloud Messaging.


Open up your developer tools.


Typ in a fake notification text


Click Next


Under the Target tab click Topic


In the network tab you will see a request to an url similar to this one

https://gcmcontextualcampaign-pa.clients6.google.com/v1/4/projects/${projectId}/topics?prefix=%2Ftopics%2F&key=${key}


Save your projectId and key in the script


Still in the developer tools, under the Application tab go to Cookies


Click on the https://console.firebase.google.com site


Here you will find the SID, HSID, SSID, APISID and the SAPISID


Save these in the script.


## index.js
var sha1 = require('sha1');
var fetch = require('node-fetch');

//See README.md
var key = "key";
var projectId = "firebase project id;

//Check cookies from https://console.firebase.google.com
var SID = "sid";
var HSID = "hsid";
var SSID = "ssid";
var APISID = "apisid";
var SAPISID = "sapisid";

exports.handler = async(event) => {
    const origin = "https://console.firebase.google.com";
    const secretFromDevConsole = `https://gcmcontextualcampaign-pa.clients6.google.com/v1/4/projects/${projectId}/topics?prefix=/topics/&key=${key}`;

    const generateAuthorizationHeader = () => {
        const currentTime = new Date().getTime();
        const sapisid = SAPISID;

        const hashed = sha1(`${currentTime} ${sapisid} ${origin}`);
        return `SAPISIDHASH ${currentTime}_${hashed}`;
    };

    const getTopicSubscriptionsCall = async() => {
        const authorizationKey = generateAuthorizationHeader();
        await fetch(secretFromDevConsole, {
                method: "GET",
                headers: {
                    "Authorization": authorizationKey,
                    "X-Origin": origin,
                    "cookie": `SID=${SID}; HSID=${HSID}; SSID=${SSID}; APISID=${APISID}; SAPISID=${SAPISID}`
                },
            })
            .then(response => response.json())
            .then(async json => {
                const topics = json.topic;
                topics.forEach(topic => console.log(topic.name + " " + topic.size));
                return { statusCode: 200 };
            });
    };

    await getTopicSubscriptionsCall();
};

## package.json
{
  "name": "check-firebase-breaking-topic-subscriptions",
  "version": "1.0.0",
  "description": "Check Firebase breaking topic subscription",
  "main": "index.js",
  "dependencies": {
    "node-fetch": "^2.3.0",
    "sha1": "^1.1.1"
  },
  "author": "Tim Rijckaert",
  "license": "ISC"
}
	var sha1 = require('sha1');
	var fetch = require('node-fetch');

	//See README.md
	var key = "key";
	var projectId = "firebase project id;

	//Check cookies from https://console.firebase.google.com
	var SID = "sid";
	var HSID = "hsid";
	var SSID = "ssid";
	var APISID = "apisid";
	var SAPISID = "sapisid";

	exports.handler = async(event) => {
	const origin = "https://console.firebase.google.com";
	const secretFromDevConsole = `https://gcmcontextualcampaign-pa.clients6.google.com/v1/4/projects/${projectId}/topics?prefix=/topics/&key=${key}`;

	const generateAuthorizationHeader = () => {
	const currentTime = new Date().getTime();
	const sapisid = SAPISID;

	const hashed = sha1(`${currentTime} ${sapisid} ${origin}`);
	return `SAPISIDHASH ${currentTime}_${hashed}`;
	};

	const getTopicSubscriptionsCall = async() => {
	const authorizationKey = generateAuthorizationHeader();
	await fetch(secretFromDevConsole, {
	method: "GET",
	headers: {
	"Authorization": authorizationKey,
	"X-Origin": origin,
	"cookie": `SID=${SID}; HSID=${HSID}; SSID=${SSID}; APISID=${APISID}; SAPISID=${SAPISID}`
	},
	})
	.then(response => response.json())
	.then(async json => {
	const topics = json.topic;
	topics.forEach(topic => console.log(topic.name + " " + topic.size));
	return { statusCode: 200 };
	});
	};

	await getTopicSubscriptionsCall();
	};
	{
	"name": "check-firebase-breaking-topic-subscriptions",
	"version": "1.0.0",
	"description": "Check Firebase breaking topic subscription",
	"main": "index.js",
	"dependencies": {
	"node-fetch": "^2.3.0",
	"sha1": "^1.1.1"
	},
	"author": "Tim Rijckaert",
	"license": "ISC"
	}