Connect to Yahoo Finance API with Flutter - flutter

Question

I am trying to connect to Yahoo Finance API within my Flutter application, and I can´t connect.
I've seen guidance to connect to the API in different languages but there is no official guidance for Dart language.
I have the following method to connect to the API:
Future<double> getStockPrice(String symbol) async {
//var client = http.Client();
var url = 'https://apidojo-yahoo-finance-v1.p.rapidapi.com';
var apiStr = "/stock/v2/get-summary";
var headers = {'x-rapidapi-key': "809135c7c7mshf35d1107bf50919p15c9fajsn37166d6b1bfc",
'x-rapidapi-host': "apidojo-yahoo-finance-v1.p.rapidapi.com"};
var params = {'symbol': 'AMRN', 'region': 'US'};
var response = await http.get(Uri.https(url, apiStr,params),headers: headers);
//https://apidojo-yahoo-finance-v1.p.rapidapi.com/stock/v2/get-summary?symbol=AMRN&region=US
//var response = await http.get(Uri.https(url, apiStr, params));
print('RESPONSE STATUS code: ${response.statusCode}');
if (response.statusCode == 200) {
print('RESPONSE STATUS code: ${response.statusCode}');
var json = jsonDecode(response.body);
String value = json['price']['regularMarketOpen']['raw'];
return double.parse(value);
} else {
return 0.0;
}
}
And I get null from this method. I guess it can be a matter of getting value variable, maybe I am not traversing the JSON tree correctly. But I don't see why.
Then I retrieve the data from the API in the following screen:
import 'package:flutter/material.dart';
import 'package:stock_analyzer/api_method/webService.dart';
class TestScreen extends StatelessWidget {
#override
Widget build(BuildContext context) {
Future<String> test = YahooFinanceService().getWebSite('symbol');
return Scaffold(
appBar: AppBar(
title: Text('test'),
),
body: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
FutureBuilder<String>(
future: test,
builder: (context, AsyncSnapshot<String> snapshot){
return Text('Result: ${snapshot.data}');
})
],
),
);
}
}
In this screen I get null. So, snapshot.data = null
Thanks

Answer 1

The 401 error shows that you are not authorized to make a post request, I think the error is that you are doing post instead of get.
Try changing:
var response = await client.post(url, body: headers);
To:
var response = await client.get(url, headers: headers);