React Native

HTTP HEAD Request

See more HTTP Examples

Sends an HTTP HEAD request and gets the response.

Note: The response to an HTTP HEAD request is always just the response header. The reponse body is always 0 length (thus the reason it's called a "HEAD" request..)

React Native

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

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

  const http = new Http();

  // If the URL uses "https://", then the connection will be TLS.
  // Otherwise it will be TCP.

  // A failure is when we don't get any response.  It could be a timeout, an inability to connect, etc.
  // For example, a "404 Not Found" response is still a response, and thus deemed success in terms of the API..

  const resp = new HttpResponse();
  try {
    await http.httpNoBodyAsync('HEAD', 'https://example-code.com/', resp);
  } catch {
    console.log(http.lastErrorText);
    return;
  }

  // Examine the response.
  console.log(`Status Code = ${resp.statusCode}`);
  console.log(`Status Line = ${resp.statusLine}`);
  console.log(`Status Text = ${resp.statusText}`);
  console.log('Full Response Header:');
  console.log(resp.header);
  console.log('----');
  const numHeaderFields = resp.numHeaderFields;
  console.log(`Num Header Fields: ${numHeaderFields}`);
  for (let i = 0; i < numHeaderFields; i++) {
    console.log(`${resp.getHeaderName(i)}: ${resp.getHeaderValue(i)}`);
  }
}