org.csource.fastdfs.DownloadStream Maven / Gradle / Ivy
package org.csource.fastdfs;
import java.io.IOException;
import java.io.OutputStream;
/**
* Download file by stream (download callback class)
*
* @author zhouzezhong
* @author Happy Fish / YuQing
* @version Version 1.11
*/
public class DownloadStream implements DownloadCallback {
private OutputStream out;
private long currentBytes = 0;
public DownloadStream(OutputStream out) {
super();
this.out = out;
}
/**
* recv file content callback function, may be called more than once when the file downloaded
*
* @param fileSize file size
* @param data data buff
* @param bytes data bytes
* @return 0 success, return none zero(errno) if fail
*/
public int recv(long fileSize, byte[] data, int bytes) {
try {
out.write(data, 0, bytes);
} catch (IOException ex) {
ex.printStackTrace();
return -1;
}
currentBytes += bytes;
if (this.currentBytes == fileSize) {
this.currentBytes = 0;
}
return 0;
}
}