Java – HTTP get: Download header files only? (not supported by head)

In my code, I use some HTTP get requests to download some files as streams I use the following code:

public String getClassName(String url) throws ClientProtocolException,IOException {
        HttpResponse response = sendGetRequestJsonText(url);

        Header[] all = response.getAllHeaders();
        for (Header h : all) {
            System.out.println(h.getName() + ": " + h.getValue());
        }

        Header[] headers = response.getHeaders("Content-Disposition");
        InputStreamParser.convertStreamToString(response.getEntity().getContent());
        String result = "";
        for (Header header : headers) {
            result = header.getValue();
        }
        return result.substring(result.indexOf("''") + "''".length(),result.length()).trim();
    }

However, this will download the entire content of the response I want to retrieve only HTTP headers without content The head request doesn't seem to work because I get state 501 and it's not implemented How can I do this?

Solution

You can consider making only one head request instead of making a get request: