React Native

Firebase DELETE - Removing Data

See more Firebase Examples

Uses the DELETE method to delete data. The data used in this example is at Chilkat Firebase Pigs Database, and is shown here:

React Native

import { AuthGoogle, FileAccess, Rest } from '@chilkat/react-native'

async function chilkatExample() {
  // Uses the DELETE method to delete a Firebase record.

  // This example requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  // This example assumes a JWT authentication token, if required, has been previously obtained.
  // See Get Firebase Access Token from JSON Service Account Private Key for sample code.

  // Load the previously obtained Firebase access token into a string.
  const fac = new FileAccess();
  let accessToken: string;
  try {
    accessToken = fac.readEntireTextFile('qa_data/tokens/firebaseToken.txt', 'utf-8');
  } catch {
    console.log(fac.lastErrorText);
    return;
  }

  const rest = new Rest();

  // Make the initial connection (without sending a request yet).
  // Once connected, any number of requests may be sent.  It is not necessary to explicitly
  // call Connect before each request.  
  try {
    await rest.connectAsync('chilkat.firebaseio.com', 443, true, true);
  } catch {
    console.log(rest.lastErrorText);
    return;
  }

  const authGoogle = new AuthGoogle();
  authGoogle.accessToken = accessToken;
  rest.setAuthGoogle(authGoogle);

  // Chilkat's sample data (pig-rescue data) is publicly readable at: https://chilkat.firebaseio.com/.json
  // This data is publicly readable, but not writable.  You'll need to 
  // run against your own database..

  // We're going to delete a pig we previously added.  The push ID of that pig was -KI3pT33wKauiMxY4QTB,
  // so the path will be "/pig-rescue/animal/-KI3pT33wKauiMxY4QTB.json"

  let jsonResponse: string;
  try {
    jsonResponse = await rest.fullRequestNoBodyAsync('DELETE', '/pig-rescue/animal/-KI3pT33wKauiMxY4QTB.json');
  } catch {
    // Something happened in the communications (either no request was sent, or no response was received.
    // (The Chilkat REST API also has lower-level methods where an app can send the request in one call,
    // and then receive the response in another call.)
    console.log(rest.lastErrorText);
    return;
  }

  // Check the response status code.   A 200 response status indicates success.
  if (rest.responseStatusCode !== 200) {
    console.log(rest.responseStatusText);
    console.log(jsonResponse);
    console.log('Failed.');
    return;
  }

  console.log('Success.');
}