public void registerCacheListener(CacheListener cacheListener) {
        this.listener = cacheListener;
    }
{@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