Package com.github.tobato.fastdfs.domain.proto.storage

Class DownloadFileStream

java.lang.Object

com.github.tobato.fastdfs.domain.proto.storage.DownloadFileStream

All Implemented Interfaces:

DownloadCallback<BufferedInputStream>

public class DownloadFileStream
extends Object
implements DownloadCallback<BufferedInputStream>

Web环境下文件下载回调方法,默认按4K循环读取，防止下载时内存溢出

 refactor:
 将HttpServletResponse调整为OutputStream对象，
 注意：使用时候在外层做response.getOutputStream()，使用完毕后，在外层做 os.close()
 如：
  os = response.getOutputStream();
  DownloadFileStream stream = new DownloadFileStream(os);
  ...
  os.close();

 

Author:

xulb

Constructor Summary

Constructors

Constructor	Description
DownloadFileStream(OutputStream responseOutputStream)	从HttpServletResponse对象response.getOutputStream()构造
DownloadFileStream(OutputStream responseOutputStream, int bufferLength)	从HttpServletResponse对象response.getOutputStream()构造

Method Summary

Modifier and Type	Method	Description
BufferedInputStream	recv(InputStream ins)	文件接收处理

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DownloadFileStream

public DownloadFileStream(OutputStream responseOutputStream)

从HttpServletResponse对象response.getOutputStream()构造

Parameters:

responseOutputStream - 输出流

DownloadFileStream

public DownloadFileStream(OutputStream responseOutputStream,
 int bufferLength)

从HttpServletResponse对象response.getOutputStream()构造

Parameters:

responseOutputStream - 输出流

bufferLength - 缓存长度

Method Details

recv

public BufferedInputStream recv(InputStream ins)
                         throws IOException

文件接收处理

Specified by:

recv in interface DownloadCallback<BufferedInputStream>

Returns:

Throws:

IOException