React Native Requires Chilkat v11.4.0+

Finnhub API - Get Stock Quote

See more AI Examples

Demonstrates how to get a stock quote from the Finnhub API. React Native

import { Http, HttpRequest, HttpResponse, JsonObject } from '@chilkat/react-native'

async function chilkatExample() {
  // Replace with your actual Finnhub API key.
  const apiKey = 'YOUR_FINNHUB_API_KEY';
  const symbolArg = 'AAPL';

  const http = new Http();

  // This is the URL without params.
  const urlWithoutParams = 'https://finnhub.io/api/v1/quote';

  const req = new HttpRequest();

  // Add params that will be sent in the URL.
  req.addParam('symbol', symbolArg);
  req.addParam('token', apiKey);

  req.httpVerb = 'GET';

  // Send the request to get the JSON response.
  const resp = new HttpResponse();
  try {
    await http.httpReqAsync(urlWithoutParams, req, resp);
  } catch {
    console.log(http.lastErrorText);
    return;
  }

  const json = new JsonObject();
  resp.getBodyJson(json);

  const statusCode = resp.statusCode;
  console.log(`response status code: ${statusCode}`);

  json.emitCompact = false;
  console.log(json.emit());

  // Sample result:

  // {
  //   "c": 248.8,
  //   "d": -4.09,
  //   "dp": -1.6173,
  //   "h": 255.493,
  //   "l": 248.07,
  //   "o": 253.9,
  //   "pc": 252.89,
  //   "t": 1774641600
  // }

  if (statusCode === 200) {
    // Add the symbol to the top of the result.
    json.addStringAt(0, 'symbol', symbolArg);

    // Rename members for clarification.
    json.rename('c', 'currentPrice');
    json.rename('d', 'change');
    json.rename('dp', 'percentChange');
    json.rename('h', 'high');
    json.rename('l', 'low');
    json.rename('o', 'open');
    json.rename('pc', 'prevClose');
    json.rename('t', 'unixTime');

    console.log(json.emit());
  } else {
    console.log('Failed');
  }
}