Method setRefererHeader

src/main/java/org/htmlunit/WebRequest.java:549–560

Sets the referer HTTP header - only if the provided url is valid. @param url the url for the referer HTTP header

(final URL url)

     * @param url the url for the referer HTTP header
     */
    public void setRefererHeader(final URL url) {
        if (url == null || !url.getProtocol().startsWith("http")) {
            return;
        }

        try {
            setAdditionalHeader(HttpHeader.REFERER, UrlUtils.getUrlWithoutRef(url).toExternalForm());
        }
        catch (final MalformedURLException ignored) {
            // bad luck us the whole url from the pager
        }
    }

    /**
     * Sets the specified name/value pair in the additional HTTP headers.