问Lambda从S3冷启动复制文件

EN

void getFile(String remoteUrl) throws Exception {

    URL url = new URL(remoteUrl); 
    HttpsURLConnection con = (HttpsURLConnection)url.openConnection();

    con.setRequestProperty("Accept-Encoding", "gzip");

    BufferedInputStream bis;
    if ("gzip".equals(con.getContentEncoding())) {
        bis = new BufferedInputStream(new GZIPInputStream(con.getInputStream()));
    }
    else {
        bis = new BufferedInputStream(con.getInputStream());
    }

    String getPath = url.getPath();
    String fileName = "/tmp/"+getPath.substring(getPath.lastIndexOf('/') + 1);

    BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(fileName));
    byte[] buff = new byte[16 * 1024];
    int len;
    while ((len = bis.read(buff)) > 0)
        out.write(buff, 0, len);
    bis.close();
    out.close();
}