private String format(String pattern, Object... args) {
        return String.format(Locale.US, pattern, args);
    }
{@link ProxyCache} that read http url and writes data to {@link Socket}

@author Alexey Danilov (danikula@gmail.com).
dkplayer-videocache/src/main/java/com/danikula/videocache/HttpProxyCache.java