java - HTTPUrlConnection和.torrent文件

我正在尝试创建独立的Web服务器，以编程方式搜索Torrent文件（例如，来自Torrentz.eu）并进行下载。
下载单个Torrent文件让我很生气，使用浏览器或Java的服务器响应似乎不同。
这是脚本：

      connection = (HttpURLConnection)url.openConnection();

            connection.setRequestProperty("Cookie", cookies);
                    System.setProperty("http.agent", "");
                    connection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11");

                    connection.setRequestMethod("GET");
                    connection.setRequestProperty("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
                    connection.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
                    connection.setRequestProperty("Connection", "keep-alive");
                    connection.setRequestProperty("Content-Language", "en-US");
                    connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
                    connection.setRequestProperty("Connection", "Keep-Alive");
                    connection.setConnectTimeout(22000);
                    connection.setReadTimeout(12000);
                    connection.setUseCaches(false);
                    connection.setDoInput(true);
                    connection.setDoOutput(true);

    connection.connect();
    respCode = connection.getResponseCode();

    if(respCode != 200){
    // do something..
    return false;
    }

    ByteArrayOutputStream list = new ByteArrayOutputStream();
stream = connection.getInputStream();

            byte[] buffer = new byte[512];
            int c;
            while ((c = stream.read(buffer)) != -1) {
                if(c > 0){
                    list.write(buffer, 0, c);
                }
            }
            list.flush();
            stream.close();

此代码适用于HTML、图像文件、ECC..但无法获取.torrent文件，它们已损坏：
例如：ubuntu torrent，
https://torcache.net/torrent/B415C913643E5FF49FE37D304BBB5E6E11AD5101/[katproxy.com]ubuntu.14.10.desktop.64bit.iso.torrent
浏览器下载的.torrent文件大小：44920字节
Java下载的.torrent文件大小：44795字节
135字节丢失！为什么？是吗？

最佳答案

找到问题了！
文件是gzip压缩的！！！可能，浏览器默认情况下会自动解压缩…非常感谢你！