0

In a Firebase web app I am working on I want to get a user ID from a mail address. For that I am trying to write a cloud function. But it is not working or I am not using it properly. Here is the current code (based on some sample I found on the net):

"use strict"; import * as functions from "firebase-functions"; import * as admin from "firebase-admin"; admin.initializeApp(functions.config().firebase); exports.myFunc = functions.https.onRequest(function(req, resp) { const from = req.body.sender; admin.auth().getUserByEmail(from) .then(function(userRecord) { console.log("Successfully fetched user data:", userRecord.toJSON()); }) .catch(function(error) { console.log("Error fetching user data:", error); }); });

I see no issue when running "firebase deploy". Then I try to test the function, various ways as I did with the demo app I wrote following this tutorial.

For example (with both existing and non-existing mail addresses):

https://us-central1-myapp.cloudfunctions.net/myFunc https://us-central1-myapp.cloudfunctions.net/[email protected]

But in either cases I get nothing in the web console and this in the browser:

Error: could not handle the request

Any suggestion from a more experienced Firebase cloud function user would be welcome.

In fact some tutorial with sample code showing how to use getUserByEmail in a firebase cloud function would be the best.

..... Here is some more information, after further investigations .....

When using this code:

const from = req.body.sender; admin.auth().getUserByEmail(from)

I get this error in the logs:

Error fetching user data: FirebaseAuthError: The email address is improperly formatted.

When using one of these lines of code:

admin.auth().getUserByEmail("[email protected]") admin.auth().getUserByEmail("[email protected]")

I get the expected result in the logs:

This for the first line (with a phony mail):

Error fetching user data: FirebaseAuthError: There is no user record corresponding to the provided identifier.

This for the second line (with an actually existing mail):

Successfully fetched user data: { 2022-01-22T07:25:04.946Z ? myFunc: uid: 'yfC123abc....', 2022-01-22T07:25:04.946Z ? myFunc: email: '[email protected]', ..... }

What I need is to know the way to correctly have this function accept a parameter (called from or whatever) and also know how to use the function from my original web app.

... Still more code after some more trial and errors ...

Here a new chunk of code showing my current issue:

const from = req.query.from; // The 2 following lines produce the expected result. // That is the mail address passed as a parameter. console.log("from(CL):", from); functions.logger.log("from(FL):", from); admin.auth().getUserByEmail(from) .then(function(userRecord) {

I get an error message, when running firebase deploy on the line with getUserByEmail reading:

src/index.ts:37:33 - error TS2345: Argument of type 'string | string[] | ParsedQs | ParsedQs[] | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'. 37 admin.auth().getUserByEmail(from) ~~~~

What is the correct syntax to use for the line handling the getUserByEmail call.

Improve this question
10
  • Hi, have you looked into Unable to get user by email using Cloud Function for Firebase? Commented Jan 19, 2022 at 13:02
  • Do you see, in the console, the error that should be printed by console.log("Error fetching user data:", error);? Commented Jan 19, 2022 at 13:29
  • @Zeenath S N. Yes, the post you mention is actually one the places which helped me get started, before writing this post. Though taking a second look, I am not quite sure what is meant by "proper config json" in the answer. But I deploy and see no problem or error. Commented Jan 20, 2022 at 3:09
  • @Renaud Tarnec. No I don't see any message like that in the logs. But I see a "408 Request Timeout" in the errors. Commented Jan 20, 2022 at 3:22
  • Can you use firebase functions:log to check your logs? Also refer docs for more details. Commented Jan 21, 2022 at 9:07

2 Answers 2

Reset to default
1

I had to use this:

const from = String(req.query.from);

instead of that:

const from = req.query.from;
Improve this answer
Sign up to request clarification or add additional context in comments.

Comments

0

The problem seems to be req.body ...

while passing the input as query-string: [email protected].

I'd assume that req.query.from should carry a value, while set.

Improve this answer

4 Comments

Well, so what should the code be? "const from = req.query.from;" ? It does not seem to work. Being able to use the function in my web app is the important thing. "[email protected]" is just a way to test (that I made up).
@Michel And how shall I know what your web app is doing? What isn't in the question is generally irrelevant. You could as well use req.body.from, while using the POST instead of the GET verb.
I can give you whatever needed information. But I don't think it matters what my page is doing. The only thing relevant for the question is that is needs to call this function (myFunc) providing a given mail address and getting back the corresponding user ID. This is exactly what I don't know how to do.
Using req.query.from (as you suggest) I indeed get some results, but for some reason I cannot use the information passed in req.query.from to feed getUserByEmail, please see the last part that I just added to my post.

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.