规范maven项目结构并升级版本号(1.27-SNAPSHOT)

src/main/java/org/csource/fastdfs/UploadStream.java

@@ -0,0 +1,61 @@
+package org.csource.fastdfs;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.InputStream;
+import org.csource.fastdfs.UploadCallback;
+
+/**
+* Upload file by stream
+* @author zhouzezhong & Happy Fish / YuQing
+* @version Version 1.11
+*/
+public class UploadStream implements UploadCallback
+{
+	private InputStream inputStream; //input stream for reading
+	private long fileSize = 0;  //size of the uploaded file
+	
+	/** 
+	* constructor
+	* @param inputStream input stream for uploading
+	* @param fileSize size of uploaded file
+	*/
+	public UploadStream(InputStream inputStream, long fileSize)
+	{
+		super();
+		this.inputStream = inputStream;
+		this.fileSize = fileSize;
+	}
+
+	/**
+	* send file content callback function, be called only once when the file uploaded
+	* @param out output stream for writing file content
+	* @return 0 success, return none zero(errno) if fail
+	*/
+	public int send(OutputStream out) throws IOException
+	{
+		long remainBytes = fileSize;
+		byte[] buff = new byte[256 * 1024];
+		int bytes;
+		while(remainBytes > 0)
+		{ 
+			try
+			{
+				if ((bytes=inputStream.read(buff, 0, remainBytes > buff.length ? buff.length : (int)remainBytes)) < 0)
+				{
+					return -1;
+				}
+			}
+			catch(IOException ex)
+			{
+				ex.printStackTrace(); 
+				return -1;
+			}
+			
+			out.write(buff, 0, bytes);
+			remainBytes -= bytes;
+		}
+		
+		return 0;
+	}
+}