My firebase function is returning null when doing nested api calls

Question

I am creating an angular-based e-commerce app and this is the API call for checking the product shipment info. But this function is returning a null value when called.

Here is the code of my function:

exports.checkOrderShipment = functions.https.onCall(
  (req: any, context: any) => {
    if (!context.auth)
      return { status: 'error', code: 401, message: 'Not signed in' };
    // console.log('checkOrderShipment', req);
    // console.log('checkOrderShipment CORS METHOD');
    let authOptions = {
      method: 'POST',
      url: 'https://apiv2.shiprocket.in/v1/external/auth/login',
      headers: {
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({
        email: 'test',
        password: 'test',
      }),
    };
    var a = new Promise(function (resolve, reject) {
      request(authOptions, function (error: any, authResponse: any, body: any) {
        if (error) return reject(error);
        try {
          resolve(JSON.parse(body));
        } catch (error) {
          reject(error);
        }
      });
    });
    return a.then(function (data: any) {
      // console.log('authApi', data, typeof data);
      // console.log(data);
      let options = {
        method: 'GET',
        url:
          'https://apiv2.shiprocket.in/v1/external/courier/track/shipment/' +
          req.shipmentId,
        headers: {
          'Content-Type': 'application/json',
          Authorization: 'Bearer ' + data.token,
        },
      };
      var shipmentData = new Promise(function (resolve, reject) {
        request(options, function (error: any, response: any) {
          if (error) return reject(error);
          // console.log('checkOrderShipment API RESPONSE', response);
          resolve({data: {
            res: response,
            req: req,
            body: response.body,
          },});
        });
      });
      shipmentData.then(function (data: any) {
        console.log('shipmentData', data);
        return data;
      });

    });
  }
);

Here is my calling method:

My services file :

checkShipmentDetail(shipmentId){
    return this.firebaseFunction.httpsCallable('checkOrderShipment')(shipmentId);
    // return this.http.post(environment.cloudFunctions.checkOrderShipment, {shipmentId:shipmentId});
  }

My component typescript page function:

this.paymentService
        .checkShipmentDetail(shipmentID)
        .subscribe((res: any) => {
          console.log('check',res)})

I am new to the onCall function and know nothing about how promises work in firebase functions. Now I knwo how to use on the Request method. Actually, I was using it previously but because of so many security problems and App Check I am moving to onCall method for functions.

Helpful link I found:

Node.js promise request return

And if possible also tell how to only allow authorized people to access the cloud functions.

score 0 · Answer 1 · answered Sep 17 '21 at 15:55

According to the documentation:

An https.onCall trigger for Cloud Functions is an HTTPS trigger with a specific format for the request and response.`

In there you could see the specifics about the format and request and response body.

Also I recommend you to check this other documentation page that shows you how to write and deploy and deploy a callable function.

On the other hand the way to manage the access to your functions is with the Firebase Authentication.

My firebase function is returning null when doing nested api calls

1 Answers1