Stream Data From Controller

From Coder's Log

One view that seems to be missing from Spring is a StreamView, which should allow a controller to return an input stream with a particular content-type to allow for download/generating arbitrary binary content.

public class StreamView implements View {
	private String contentType;
	private InputStream inputStream;


	public StreamView(String contentType, InputStream inputStream) {
		this.contentType = contentType;
		this.inputStream = inputStream;
	}

	public String getContentType() {
		return contentType;
	}

	public void render(Map model, HttpServletRequest request, HttpServletResponse response) throws Exception {
		response.setContentType(getContentType());
		OutputStream os=response.getOutputStream();
		byte[] buffer=new byte[1024];
		int count;
		while((count=inputStream.read(buffer))>0)
			os.write(buffer,0,count);
		os.flush();
		inputStream.close();
	}
	
}

To Use simply return from a controller

new ModelAndView(new StreamView("content/type",inputStream));