HTTP headers for Redirected HEAD requests

[Krishna Sankaran]

I am using the following java snippet for a HEAD request. The request gets 
redirected couple of times, a 301 followed by 302 and dinally gets a 200.When i 
use the following code snippet, i get the status as 200 OK, however all the 
header fields are from the 1st response (301). The Content-Length header is 
present in the last response, but i don't see that in the header's received by 
the code. Is there a knob to get the last header or all headers?

private static final String SAMPLE_URL = 
"https://www.dropbox.com/s/<something>/test_out4.mp4";

public static void main(String[] args) throws IOException, URISyntaxException {
    HttpClient client = HttpClientBuilder.create().build();
    HttpHead request = new HttpHead(new URI(SAMPLE_URL));
    HttpResponse response = client.execute(request);
    System.out.println(response.getStatusLine());
    for (Header header : response.getAllHeaders()) {
        System.out.println(header.getName() + ": " + header.getValue());
    }
}

It returns the code as 200 OK, but the Content-Type is incorrect, even 
the 
HTTP/1.1 200 OK <<< Status is 200 Server: nginx Date: Thu, 20 Jun 2019 02:22:58 
GMT Content-Type: text/html; charset=utf-8 << Content type is char              
                        <<<< Content-Length is missing!!!!!

curl -I https://www.dropbox.com/s//test_out4.mp4 << Curl works correctly



 HTTP/1.1 301 Moved Permanently <<< Status 301 Server: nginx 
Date: Thu, 20 Jun 2019 02:20:50 GMT Content-Type: text/html; charset=utf-8 <<< 
Content type text Connection: keep-alive
....
HTTP/1.1 302 Found << second redirect Server: nginx 
Date: Thu, 20 Jun 2019 02:36:03 GMT 
 Content-Type: text/html; charset=utf-8
....
HTTP/1.1 200 OK <<< Status finally 200 Server: nginx 
Date: Thu, 20 Jun 2019 02:36:04 GMT 
 Content-Type: video/mp4 << content type correct 
 Content-Length: 92894175 << length correct Connection: keep-alive