How to send current user's(person using the app), Firebase Id token,from the Flutter app, to restapi, using http POST method?

user_13462594 0
Viewed 479

I have created an app using flutter for UI and Restapi in nodejs as the backend. Now i want to verify the user, who signuped with the firebase authentication,the sending the current user's firebase Id token. In order, to do this I am sending the id token using the HTTP Post method. But got an error.

Sample code:

        import 'package:http/http.dart' as http;

    FirebaseUser user = await FirebaseAuth.instance.currentUser();
       if(user!=null){
  Future<IdTokenResult> idtoken = user.getIdToken();
    }
 http.Response response = await http.post("https://www.something.com/something/something",
                              body:jsonEncode({
                                "name": name.text,
                                "pincode": "$pincode",
                                "token": idtoken,
                                "phone": "${widget.phoneNo}",
                              }),
                                  headers: {'Content-Type': 'application/json'},
                              );

Got Error:

     Unhandled Exception: Converting object to an encodable object failed: Instance of 'Future<IdTokenResult>'

P.S: Suggest an edit, if something wrong with the question, I am for ideas (Thanks for the help in advance :) )

firebase-authentication firebase flutter node.js http
2 Answers

You need token(String) not idtoken(IdTokenResult)

import 'package:http/http.dart' as http;

FirebaseUser user = await FirebaseAuth.instance.currentUser();

if(user!=null){
  IdTokenResult idtoken = await user.getIdToken(); 
  // get String token  
  String token = idtoken.token;
}
 http.Response response = await http.post("https://www.something.com/something/something",
                              body:jsonEncode({
                                "name": name.text,
                                "pincode": "$pincode",
                                "token": token,
                                "phone": "${widget.phoneNo}",
                              }),
                                  headers: {'Content-Type': 'application/json'},
                              );
user_61176750

I think the problem is getIdToken() part.

Can you try below code please:

FirebaseAuth.instance.currentUser().then(user => {
        if (user != null) {
           user.getIdToken().then(token => {
              http.Response response = await http.post("https://www.something.com/something/something",
                              body:jsonEncode({
                                "name": name.text,
                                "pincode": "$pincode",
                                "token": token,
                                "phone": "${widget.phoneNo}",
                              }),
                                  headers: {'Content-Type': 'application/json'},
                              );
        }
});
user_128806760
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