(JavaScript) 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 is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

var success = false;

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

var 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..

var resp = new CkHttpResponse();
success = http.HttpNoBody("HEAD","https://example-code.com/",resp);
if (success == false) {
    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("----");
var numHeaderFields = resp.NumHeaderFields;
console.log("Num Header Fields: " + numHeaderFields);
var i;
for (i = 0; i <= numHeaderFields - 1; i++) {
    console.log(resp.GetHeaderName(i) + ": " + resp.GetHeaderValue(i));
}