Android™

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..)

Android™

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    boolean success = false;

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

    CkHttp http = new CkHttp();

    // 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..

    CkHttpResponse resp = new CkHttpResponse();
    success = http.HttpNoBody("HEAD","https://example-code.com/",resp);
    if (success == false) {
        Log.i(TAG, http.lastErrorText());
        return;
        }

    // Examine the response.
    Log.i(TAG, "Status Code = " + String.valueOf(resp.get_StatusCode()));
    Log.i(TAG, "Status Line = " + resp.statusLine());
    Log.i(TAG, "Status Text = " + resp.statusText());
    Log.i(TAG, "Full Response Header:");
    Log.i(TAG, resp.header());
    Log.i(TAG, "----");
    int numHeaderFields = resp.get_NumHeaderFields();
    Log.i(TAG, "Num Header Fields: " + String.valueOf(numHeaderFields));
    int i;
    for (i = 0; i <= numHeaderFields - 1; i++) {
        Log.i(TAG, resp.getHeaderName(i) + ": " + resp.getHeaderValue(i));
        }


  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}