I'm trying use Telegraf library with Firebase Functions but it's not working as I expected.
I follow these this article and instructions as appear in webhooks (as appears for express example) and webhookcallback as appear in telegraf docs.
const Telegraf = require('telegraf')
// The Cloud Functions for Firebase SDK to create Cloud Functions and setup triggers.
const functions = require('firebase-functions')
// The Firebase Admin SDK to access the Firebase Realtime or Firestore Database.
const admin = require('firebase-admin')
// set telegraf and responses.
const BOT_TOKEN = 'my-telegram-bot-token'
const bot = new Telegraf(BOT_TOKEN)
bot.start((ctx) => ctx.reply("Start instructions"))
bot.help((ctx) => ctx.reply("This is help"))
bot.hears('hi', (ctx) => ctx.reply('Hola'))
bot.on('text', (ctx) => ctx.reply('Response to any text'))
bot.catch((err, ctx) => {
console.log(`Ooops, ecountered an error for ${ctx.updateType}`, err)
})
// initialize bot
bot.launch() // <-- (2)
//appends middleware
exports.ideas2coolBot = functions.https.onRequest(bot.webhookCallback(`/my-path`));
In firebase server I need add bot.launch() (2) to get worked, but it works just for max timeout set in Firebase Function. I need to recall Telegram "setWebhook" API to get work again and it works for the same time. It's like it's generate one function instance and shut down when time is over.
I noted the telegraf.launch() have options to start in poll or webhook mode but its not pretty clear for me how to use this options.
How should I use telegram.launch() to get worked in webhook mode in Firebase?
Edit:
When I used getWebhookInfo I get this result:
{
"ok": true,
"result": {
"url": "https://0dbee201.ngrok.io/test-app-project/us-central1/testAppFunction/bot",
"has_custom_certificate": false,
"pending_update_count": 7,
"last_error_date": 1573053003,
"last_error_message": "Read timeout expired",
"max_connections": 40
}
}
and console shows incoming conection but do nothing...
i functions: Beginning execution of "ideas2coolBot"
i functions: Finished "ideas2coolBot" in ~1s
Edit2:
I've been trying adding Express too...
app.use(bot.webhookCallback('/bot'))
app.get('/', (req, res) => {
res.send('Hello World from Firebase!')
})
exports.ideas2coolBot = functions.https.onRequest(app);
it's works '/' path but got nothing with '/bot'. POST to '/bot' not response.
By the way, I tried a express standalone version and works prefect, but using it with firebase doesn't respond ("Read timeout expired").
delete
bot.launch()
try add this
exports.YOURFUNCTIONNAME = functions.https.onRequest(
(req, res) => bot.handleUpdate(req.body, res)
)
then set ur webhook manually
https://api.telegram.org/bot{BOTTOKEN}/setWebhook?url={FIREBASE FUNCTION URL}'
Related
This looks to be pretty obvious but I've been trying to figure it out for a couple of days now and still can't get it to work. Please, can someone point out what I'm missing.
I'm trying to make an axios call to my cloud run service from my firebase hosted SPA. To isolate the issue I followed the steps outlined in the [firebase tutorial for cloud run] (https://firebase.google.com/docs/hosting/cloud-run#node.js)
Step 4 of the tutorial talks about setting up rewrite to use the firebase domain as a proxy to your cloud run service. It says that the helloworld service would be reachable via
Your Firebase subdomains:
projectID.web.app/helloworld and projectID.firebaseapp.com/helloworld
So I follow the steps and deploy the service. Then I try to make an axios call to the service from the SPA like below
testHelloWorld () {
axios.get(`https://myProjectId.firebaseapp.com/helloworld`)
.then((data) => {
console.log(data)
})
.catch(ex => {
console.error(ex)
})
})
}
But then I get the CORS error
Access to XMLHttpRequest at 'https://myProjectId.firebaseapp.com/helloworld' from origin 'https://myFirabaseApp.firebaseapp.com' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
This answer states that this should be possible so I'm not sure what I'm doing wrong.
N.B:
While debugging, I updated the node app from the tutorial to add cors support like below. Still didnt work.
const express = require('express');
const app = express();
const cors = require('cors'); //Imported and added this
app.use(cors()); // Used here
app.get('/', (req, res) => {
console.log('Hello world received a request.');
const target = process.env.TARGET || 'World';
res.send(`Hello ${target}!`);
});
const port = process.env.PORT || 8080;
app.listen(port, () => {
console.log('Hello world listening on port', port);
});
So the question here is, how do I make an Axios/AJAX call to my cloud run service using the firebase rewrite rule?
Please check if you have installed cors: npm install cors.
Please check if the 2 following options can solve your issue:
1= Use the following code :
app.use(cors({origin:true,credentials: true}));
2) If the previous didn't work, please use the following code:
app.get('/', (req, res) => {
res.setHeader('Access-Control-Allow-Origin', '*');
console.log('Hello world received a request.');
}
Please let me know if it works for you.
I am working in an android app project for my college minor project. Everything is working but now i want to add a notification feature, i.e whenever a admin posts a notice every user subscriber to that topic gets notification, i tried to follow different tutorials and documents but since i have no programming background in js/nodejs/php i couldn't understand the cloud functions.
Can anyone write the functions or lead me to the answer?
i want the function to be triggered when a new notice is added inside /Notice and send notification to all users subscribe to Notice..
i wrote the following code, after some study,
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
exports.sendNotices =
functions.database.ref('/Notices/{nID}').onCreate((event) => {const data =
event.data;
if(!data.changed()){
console.log('Nothing changed');
return;
}else{
console.log(data.val());
}
const payLoad = {
notification:{
title: 'Message received',
body: 'You received a new message',
sound: "default"
}
};
const options = {
priority: "high",
timeToLive: 60*60*2
};
return admin.messaging().sendToTopic("bctb", payLoad, options);});
and got the error in console of firebase,what am i doing wrong here,
TypeError: Cannot read property 'changed' of undefined
at exports.sendNotices.functions.database.ref.onCreate
(/user_code/index.js:8:13)
at cloudFunctionNewSignature (/user_code/node_modules/firebase-
functions/lib/cloud-functions.js:105:23)
at cloudFunction (/user_code/node_modules/firebase-functions/lib/cloud-
functions.js:135:20)
at /var/tmp/worker/worker.js:770:24
at process._tickDomainCallback (internal/process/next_tick.js:135:7)
Since you are not familiar with the Firebase Cloud Functions, I recommend you first go through official docs here, because without going through the basics you won't understand how they work and then go through Firebase Cloud Messaging (FCM) docs here. Once you get to know how both the service work it'll be a lot easier for you to understand and write your own cloud function. For your ease here is how your function should be like.
You can do this by simply creating an onCreate trigger function. So it will look something like:
exports.SendNotification = functions.database.ref('/Notice/{nid}')
.onCreate((snapshot, context) => {
//Your notification code here
}
Here nid is the notice id that is just created. Firebase will automatically get this id. And for sending the notification you can use Firebase cloud messaging (FCM). In this cloud function you can create a notification payload.
//send notification
const payload = {
data:{
title: "New notice has been added!",
}
};
Now you can send this notification to the app using:
admin.messaging().sendToDevice(instID, payload);
Here, instID is the instance ID. Each app installed has a unique instance ID. For sending to multiple devices you'll have to wrap the code line above in an loop to send notifications to all of the subscribed users. For this you need instance IDs of all the subscribed users.
"I hear and I forget, I see and I remember, I do and I understand"
Best of luck.
I want to make post request and send data into body in firebase cloud function.
as default, it is get request or post request?
var functions = require('firebase-functions');
exports.tryfunction= functions.https.onRequest((req, res) => {
console.log(req.body) // or it should be req.query
});
how do I know and decide what the method it is?
I just sharing simple code part. I'm using like this.
const functions = require('firebase-functions');
exports.postmethod = functions.https.onRequest((request, response) => {
if(request.method !== "POST"){
response.send(405, 'HTTP Method ' +request.method+' not allowed');
}
response.send(request.body);
});
I hope it will be helpful.
There is no default. The request method is whatever the client chose to send.
The req object in your callback is an express.js Request object. Use the linked documentation, you can see that the request method can be found by using req.method.
To specify the HTTP method that your Firebase Function accepts you need to use Express API as you'd normally do in a standard Express app.
You can pass a full Express app to an HTTP function as the argument for onRequest(). This way you can use Express' own API to restrict your Firebase function to a specific method. Here's an example:
const express = require('express');
const app = express();
// Add middleware to authenticate requests or whatever you want here
app.use(myMiddleware);
// build multiple CRUD interfaces:
app.get('/:id', (req, res) => res.send(Widgets.getById(req.params.id)));
app.post('/', (req, res) => res.send(Widgets.create()));
app.put('/:id', (req, res) => res.send(Widgets.update(req.params.id, req.body)));
app.delete('/:id', (req, res) => res.send(Widgets.delete(req.params.id)));
app.get('/', (req, res) => res.send(Widgets.list()));
// Expose Express API as a single Cloud Function:
exports.widgets = functions.https.onRequest(app);
Explanation of the above code:
We expose a Firebase function with endpoint /widgets with different handlers for different HTTP methods using Express' own API, e.g. app.post(..), app.get(..), etc. We then pass app as an argument to functions.https.onRequest(app);. That's it, you're done!
You can even add more paths if you wish, E.g. if we want an endpoint that accepts GET requests to an endpoint that looks like: /widgets/foo/bar, we simply add app.get('/foo/bar', (req, res => { ... });.
It's all taken directly from the official Firebase docs.
I'm surprised #Doug Stevenson didn't mention this in his answer.
I'd like to integrate my firebase project with some 3rd party API's, like the twitter API.
3rd party API
The following code will listen to new tweets containing the certain text 'little rocket man':
var Twitter = require('twitter');
// setup new twitter client
var client = new Twitter({
consumer_key: '',
consumer_secret: '',
access_token_key: '',
access_token_secret: ''
});
// open new twitter stream
let stream = this.client.stream('statuses/filter', { track: 'little rocket man' });
stream.on('data', (event: any) => {
let tweetText = event && event.text; // this should be written to the firebase db
});
Firebase Cloud Functions
The following firebase cloud functions listens to incoming HTTP GET requests on a specific route and saves data back to the firebase db:
import * as functions from 'firebase-functions';
import * as admin from 'firebase-admin'; // Firebase Admin SDK
admin.initializeApp(functions.config().firebase);
// this example uses a HTTP trigger, but how can I trigger it whenever new tweets containint 'little rocket man' are detected??
exports.addMessage = functions.https.onRequest((req, res) => {
const original = req.query.text;
admin.database().ref('/messages').push({original: original}).then(snapshot => {
res.redirect(303, snapshot.ref);
});
});
Question
How can I write the tweets I'm recieving from the twitter client back to the firebase db? If possible, I'd like to run all the code on firebase cloud functions.
Disclaimer:
I'm new to firebase and although googling around for a few hours I wasn't able to find the solution to my problem on the net. I'd like to apologize in advance, should I have overseen it.
You can't use streaming APIs like this in Cloud Functions. A function may only respond to some distinct event, such as an HTTP request, or some change in your database. Functions can't run indefinitely.
If you want to collect tweets that match some query into your database, you can use IFTTT to periodically send them to a function as they become available. I recently finished a small project that does exactly that.
I have created Firebase Cloud Functions app,
I created function with https.onRequest.
and get data with req.body but there is not data there.
Can Firebase Cloud Functions can handle HTTP POST method?
This is my sample code:-
var functions = require('firebase-functions');
exports.testPost = functions.https.onRequest((req, res) => {
console.log(req.body);
});
I tested by postman with POST method but didn't show result in Firebase log.
Functions built on Firebase can also use Express.js routers for handling GET/POST/PUT/DELETE, etc... is fully supported by Google, and is the recommended way to implement these types of functions.
More documentation can be found here:
https://firebase.google.com/docs/functions/http-events
Here's a working example built on Node.js
const functions = require('firebase-functions');
const express = require('express');
const cors = require('cors');
const app = express();
// Automatically allow cross-origin requests
app.use(cors({ origin: true }));
app.get('/hello', (req, res) => {
res.end("Received GET request!");
});
app.post('/hello', (req, res) => {
res.end("Received POST request!");
});
// Expose Express API as a single Cloud Function:
exports.widgets = functions.https.onRequest(app);
Then, run firebase deploy, and that should compile your code and create the new "widgets" function. Note: You can rename widgets to anything you want. Ultimately, it will generate a URL for calling the function.
I am planning to do the same thing. What I reckon the approach should be is to check the request.method in the function body. A probable approach can be:
if (request.method != "POST") {
respond.status(400).send("I am not happy");
return;
}
// handle the post request
Here's some reference to the details regarding what the request object holds: https://firebase.google.com/docs/functions/http-events
Firebase functions support GET, POST, PUT, DELETE, and OPTIONS method, and you can check what kind of methods that trigger your function.
// Check for POST request
if(request.method !== "POST"){
res.status(400).send('Please send a POST request');
return;
}
Then to get data from POST request (for example JSON type) will be in the header of your request.
const postData = request.body;
// for instance
const format = req.body.format;
// query string params
let format = req.query.format;
Maybe your project hasn't been setup to communicate with your firebase database. Try the following from your terminal:
npm install -g firebase-tools
Then inside your project folder, run the following and login using your credentials
firebase login
Then
firebase init functions
This will create a folder with index.js, package.json and node_modules
If you are using Postman correctly the rest of your code should work.