(Java) HTTP HEAD Request

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..)

Note: This example requires Chilkat v11.0.0 or greater.

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import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    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) {
        System.out.println(http.lastErrorText());
        return;
        }

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