I have an angular 2 app where I'm calling a Firebase via an http request. However, anytime, I try to run the function, I'm getting this error:
XMLHttpRequest cannot load https://us-central1-<my-projectId>.cloudfunctions.net/getUserByEmail?email=user@email.com. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:4200' is therefore not allowed access. The response had HTTP status code 500.
error_handler.js:54 EXCEPTION: Response with status: 0 for URL: null
ErrorHandler.handleError @ error_handler.js:54
next @ application_ref.js:348
schedulerFn @ async.js:93
SafeSubscriber.__tryOrUnsub @ Subscriber.js:234
SafeSubscriber.next @ Subscriber.js:183
Subscriber._next @ Subscriber.js:125
Subscriber.next @ Subscriber.js:89
Subject.next @ Subject.js:55
EventEmitter.emit @ async.js:79
NgZone.triggerError @ ng_zone.js:333
onHandleError @ ng_zone.js:294
ZoneDelegate.handleError @ zone.js:338
Zone.runTask @ zone.js:169
ZoneTask.invoke @ zone.js:420
Subscriber.js:238 Uncaught Response {_body: ProgressEvent, status: 0, ok: false, statusText: "", headers: Headers…}
Here is my Cloud Function for Firebase index.js file:
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
const cors = require('cors')({origin: true});
/**
* Function to get a user by email
*/
exports.getUserByEmail = functions.https.onRequest((req, res) => {
cors(request, response, () => {
// This should return a promise from the getUserByEmail function
response.status(200).send(admin.auth().getUserByEmail(req.query.email))
})
});
And then here's how I'm calling the function in a component (assuming the HTTP request is made successfully):
this.http.get('https://us-central1-rosebud-9b0ed.cloudfunctions.net/getUserByEmail', {
search: "user@email.com"
}).subscribe(data => {
console.log('data', data);
})
It would seem that no matter what I try, I keep hitting this same issue. I've even tried deploying this to my firebase hosted URL and it still gives me this error. Anyone know what I can do here?
Thanks in advance!
So I made a few key mistakes here.
cors before you initialize the Firebase app.cors() function.Here is the updated index.js code:
const functions = require('firebase-functions');
const admin = require('firebase-admin');
const cors = require('cors')({origin: true});
admin.initializeApp(functions.config().firebase);
/**
* Function to get a user by email
*/
exports.getUserByEmail = functions.https.onRequest((request, response) => {
cors(request, response, () => {
// This should return a promise from the getUserByEmail function
response.status(200).send(admin.auth().getUserByEmail(req.query.email))
})
});