React Native

Google Contacts - Delete a Contact

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Demonstrates how to delete a Google Contact. React Native

import { AuthGoogle, JsonObject, Rest, StringBuilder, Xml } from '@chilkat/react-native'

async function chilkatExample() {
  // This example requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  // --------------------------------------------------------------------------------------------------------
  // Note: The code for setting up the Chilkat REST object and making the initial connection can be done once.
  // Once connected, the REST object may be re-used for many REST API calls.
  // (It's a good idea to put the connection setup code in a separate function/subroutine.)
  // --------------------------------------------------------------------------------------------------------

  // It is assumed we previously obtained an OAuth2 access token.
  // This example loads the JSON access token file 
  // saved by this example: Get Google Contacts OAuth2 Access Token

  const jsonToken = new JsonObject();
  try {
    jsonToken.loadFile('qa_data/tokens/googleContacts.json');
  } catch {
    console.log('Failed to load googleContacts.json');
    return;
  }

  const gAuth = new AuthGoogle();
  gAuth.accessToken = jsonToken.stringOf('access_token');

  const rest = new Rest();

  // Connect using TLS.
  const bAutoReconnect = true;
  await rest.connectAsync('www.google.com', 443, true, bAutoReconnect);

  // Provide the authentication credentials (i.e. the access token)
  rest.setAuthGoogle(gAuth);

  // ----------------------------------------------
  // OK, the REST connection setup is completed..
  // ----------------------------------------------

  // To update a contact, we'll first get the contact information
  // to get the etag.

  // To retrieve the contact, send the following:
  // 	GET /m8/feeds/contacts/default/full/{contactId}
  // 	GData-Version: 3.0

  rest.addHeader('GData-Version', '3.0');

  const sbPath = new StringBuilder();
  sbPath.append('/m8/feeds/contacts/default/full/{contactId}');
  // Get the contact having contactId = "5b6d64980b1ed462"
  const numReplacements = sbPath.replace('{contactId}', '5b6d64980b1ed462');

  const sbResponseBody = new StringBuilder();
  try {
    await rest.fullRequestNoBodySbAsync('GET', sbPath.getAsString(), sbResponseBody);
  } catch {
    console.log(rest.lastErrorText);
    return;
  }

  // A successful response will have a status code equal to 200.
  if (rest.responseStatusCode !== 200) {
    console.log(`response status code = ${rest.responseStatusCode}`);
    console.log(`response status text = ${rest.responseStatusText}`);
    console.log(`response header: ${rest.responseHeader}`);
    console.log(`response body: ${sbResponseBody.getAsString()}`);
    return;
  }

  // If the 200 response was received, then the contacts XML is contained
  // in the response body.
  const xml = new Xml();
  xml.loadSb(sbResponseBody, false);

  console.log(xml.getXml());
  console.log('-------------------');

  // Get the etag:
  const lastKnownEtag = xml.getAttrValue('gd:etag');
  console.log(`lastKnownEtag = ${lastKnownEtag}`);
  console.log('-------------------');

  // To delete, send the following:

  // 	DELETE /m8/feeds/contacts/default/full/{contactId}
  // 	If-Match: {lastKnownEtag}
  // 	GData-Version: 3.0

  rest.clearAllHeaders();
  rest.addHeader('If-Match', lastKnownEtag);
  rest.addHeader('GData-Version', '3.0');

  // The sbPath already contains the correct path..
  try {
    await rest.fullRequestNoBodySbAsync('DELETE', sbPath.getAsString(), sbResponseBody);
  } catch {
    console.log(rest.lastErrorText);
    return;
  }

  // A successful response will have a status code equal to 200.
  if (rest.responseStatusCode !== 200) {
    console.log(`response status code = ${rest.responseStatusCode}`);
    console.log(`response status text = ${rest.responseStatusText}`);
    console.log(`response header: ${rest.responseHeader}`);
    console.log(`response body: ${sbResponseBody.getAsString()}`);
    console.log(`request header: ${rest.lastRequestHeader}`);
    return;
  }

  // The response body for a successful DELETE is empty.
  console.log('Response Body: (should be empty)');
  console.log(sbResponseBody.getAsString());
  console.log('Success.');
}