I have a graphql api running on a firebase function and I develop locally for the most part.
Before when I called the firebase functions directly I would use the connectFunctionsEmulator function to conditionally connect to my local emulator and when I called the functions using getFunctions it would know to call my localhost endpoint.
However I'm trying to use Apollo client and I'm not sure how to determine when the local emulators have been connected and when they have not as well as how to determine the absolute url when calling the function like the way firebase does when I call it using the firebase functions helpers.
I went snooping through the code and when I call the connectFunctionsEmulator function it updates a variable called functionsInstance.emulatorOrigin.
This is not present in the functions typing but I'm still able to access the value by doing getFunctions().emulatorOrigin.
If the value is not set to null that means firebase will be talking to my emulators and not to the live endpoint.
function getGraphQLUri(): string {
const functions = getFunctions();
const app = getApp();
const { projectId } = app.options;
const { region } = functions;
// emulatorOrigin is not defined in the typings but it exists
// #ts-ignore
const emulator = functions.emulatorOrigin;
let url: string = "";
if (emulator) {
url = `${emulator}/${projectId}/${region}/graphql`;
} else {
url = `https://${region}-${projectId}.cloudfunctions.net/graphql`;
}
return url;
}
I would appreciate if someone at Google can confirm whether this approach might continue to be supported in the future.
Related
I'm using localStorage on the server and it works fine locally. But when I deployed my code to Deno deploy is not defined
Do I need to import the localStorage? I Deno.com I couldn't find any docs talking about localStorage so maybe that feature is not supported yet. In that case, where can I deploy my code to use it? Thanks
import {Handlers, PageProps} from "$fresh/server.ts";
interface Data {
email: string[]
}
export const handler: Handlers<Data> = {
GET(_req, ctx) {
const emailsStorage = localStorage.getItem("email");
const email = emailsStorage ? JSON.parse(emailsStorage) : [];
console.log(email);
return ctx.render({ email });
},
};
export default function EmailPage({ data }: PageProps<Data>) {
const { email } = data;
return (
<main>
<h1>Emails</h1>
<ul>
{email.map((email) => (
<li>{email}</li>
))}
</ul>
</main>
);
}
The full list of available APIs is here (note that localStorage is not listed).
Deploy does not offer any persistent data storage mechanism. After your deployed code finishes executing in response to a request, all of the JS memory is destroyed, so if you want to work with mutable data that persists between requests, then you'll have to store that data yourself elsewhere — e.g. by sending the data in a network request to another server / hosted database / etc. and then requesting it when you need it.
The docs include several "persist data" tutorials that you can use as a guide/reference in order to learn.
You can persist data in local storage by creating a virtual local Storage by using this code.
import { installGlobals } from "https://deno.land/x/virtualstorage#0.1.0/mod.ts";
installGlobals();
localStorage.getItem("email") will work on Deno Deploy also.
I'm trying to connect my app to firebase but the only response I get is not the response json I need from firebase. I included my call to firebase below. Is the url not correct? The response I'm getting back is not the json object made with firebase that I created.
``
<script>
(async function call () {
console.log("hello")
const endpoint = url
console.log(endpoint)
async function initiation () {
const result = await fetch(endpoint, {mode: "no-cors"})
const data = await result
console.log(data)
}
initiation()
})()
</script>
``
is your database in us-central1?
according to documentation [1] "the form https://<"databaseName">.firebaseio.com (for us-central1 databases) or https://<"databaseName"><"region">.firebasedatabase.app (for databases in all other locations)."
If its in another region you should try with https://<"databaseName"><"region">.firebasedatabase.app
[1]https://firebase.google.com/docs/database/web/start#initialize_the_javascript_sdk
The structure within your code seems odd, if you are implementing the CDN you need to initiate your app with your project credentials, right now you are only accessing a real-time database as a public request and does not provide any additional validators as the database is most likely to have Security Rules enabled.
To request data from the endpoint, you need to also include a .json at the end of the URL https://[PROJECT_ID].firebaseio.com/users/jack/name.json
Source: https://firebase.google.com/docs/reference/rest/database#section-get
How can I properly simulate a cloud function locally so that it has all data as when being invoked on firebase servers? (e.g. the context.auth)
I am serving my project with firebase serve, it runs ok on http://localhost:5000/, however, my cloud functions are being called from https://us-central1-<my-app>.cloudfunctions.net/getUser. (The function is not even deployed.)
To avoid XY problem, I am trying to debug my function, but calling it from firebase shell results in context.auth being undefined, same when calling via postman from http://localhost:5000/<my-app>/us-central1/getUser.
This is my ./functions/src/index.ts file
import * as functions from 'firebase-functions'
import admin from 'firebase-admin'
import { inspect } from 'util'
admin.initializeApp()
export const getUser = functions.https.onCall((data, context) => {
console.debug('== getUser called =========================================')
console.log('getUser', inspect(data), inspect(context.auth))
return admin.database().ref('userRights/admin').child(context.auth.uid).once('value', snapshot => {
console.log(snapshot.val())
if (snapshot.val() === true) {
return 'OK'
// return {status: 'OK'}
} else {
return 'NOK'
// return {status: 'error', code: 401, message: 'Unauthorized'}
}
})
})
file ./firebase.functions.ts
import { functions } from '~/firebase'
export const getUser = functions.httpsCallable('getUser')
Consumer ./src/pages/AdminPanel/index.tsx
import { getUser } from '~/firebase.functions'
//...
getUser({myDataX: 'asd'}).then(response => console.debug('response', response))
UPDATE - April/2021
As of April/2021, method useFunctionsEmulator has been deprecated. It is suggested to use method useEmulator(host, port) instead.
Original post:
By default, firebase serve sends queries to CLOUD function instead of localhost, but it is possible to change it to to point to localhost.
#gregbkr found a workaround for that at this github thread.
You basically add this after firebase initialization script (firebase/init.js) in html head.
<script>
firebase.functions().useFunctionsEmulator("http://localhost:5001");
</script>
Make sure to REMOVE it when deploying to SERVER
There is currently no support for local testing of callable functions like this. The team is working on a way for you to specify the URL endpoint of a callable function so that you can redirect it to a different location for testing.
Just found a workaround.
using fiddlers AutoResponder to redirect the function call to the local served function.
step 1
copy the target url of the function from the client
step 2
copy the local served function url
step 3
active the auto respoder and use the following rules
(the second rule is also importent to allow all outher requests
That worked for me, thank you #GorvGoyl!
script src="/__/firebase/init.js?useEmulator=true"></script
I'm able to authorize the Firebase app from my existing Electron app using firebase.auth().signInWithCustomToken. The promise for this method resolves and I'm able to obtain the current authorized user with firebase.auth().currentUser.uid.
At this point I must technically be able to write to /users/<currentUser>. However calling the userRef.set() and userRef.update() methods does not update the database reference and fails silently (both the callback and the promise from these methods do not resolve and there is no error thrown).
What is strange is that the exact same code works in a different, newly created Electron app. My code looks like below:
const writeToFirebase = (customToken) => {
syncApp.auth().signInWithCustomToken(customToken).then(user => {
const userId = firebase.auth().currentUser.uid; // this is successfull
const userRef = firebase.database().ref("/users/" + userId);
userRef.set({data: data}, () => { //callback does not trigger });
userRef.update({data: data})
.then(() => {//promise does not resolve})
.catch(err) => {// promise is not rejected either! }
});
}
Any pointers on how to go about debugging this would be helpful.
I discovered the problem. It's unlikely anybody else would have the same issue, but if you do, take a look at the userAgent value in your browserWindow.loadURL in Electron.
Mine was set to an Android mobile device & Firebase was not setting/updating due to this reason. I presume the Firebase server reacts differently when it sees a mobile userAgent and I was using the Firebase JS SDK and not the Android SDK which caused the issue.
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.