package com.foxinmy.weixin4j.http.entity;
   
   import java.io.File;
   import java.io.FileInputStream;
   import java.io.IOException;
   import java.io.InputStream;
   import java.io.OutputStream;
   
   import com.foxinmy.weixin4j.http.ContentType;
  
  public class FileEntity implements HttpEntity {
  
  	private final File file;
  	private final ContentType contentType;
  
  	public FileEntity(File file) {
  		this(file, ContentType.DEFAULT_BINARY);
  	}
  
  	public FileEntity(File file, ContentType contentType) {
  		this.file = file;
  		this.contentType = contentType;
  	}
  
  	@Override
  	public ContentType getContentType() {
  		return contentType;
  	}
  
  	@Override
  	public long getContentLength() {
  		return this.file.length();
  	}
  
  	@Override
  	public InputStream getContent() throws IOException {
  		return new FileInputStream(this.file);
  	}
  
  	@Override
  	public void writeTo(OutputStream outstream) throws IOException {
  		InputStream instream = new FileInputStream(this.file);
  		try {
  			byte[] tmp = new byte[4096];
  			int l;
  			while ((l = instream.read(tmp)) != -1) {
  				outstream.write(tmp, 0, l);
  			}
  			outstream.flush();
  		} finally {
  			instream.close();
  		}
  	}
  }