[JAVA] URL호출을 이용한 File Download

화면단에서 a태그를 만들어 Download Rule을 호출하는 방식으로 File을 다운로드하는 방법을 만들어 기록해놓는다.

 

Javascript

fileDownload : function(fileID,fileName,filePath){
				var obj = document.createElement("a");
				if(fileName.includes('%')){
					fileName = fileName.replace(/%/gi, ''); 
				}
				if(fileName.includes('#')){
					fileName = fileName.replace(/#/gi, escape('#')); 
				}
				
				if(window.location.href.includes('#')){
					obj.href = window.location.href.slice(0,-1)+"do?r=downloadRule&file_id="+fileID+"&file_name="+fileName+"&file_path="+filePath;
				}else{
					 
					obj.href = window.location.href+"do?r=downloadRule&file_id="+fileID+"&file_name="+fileName+"&file_path="+filePath;
				}
	            
	          	obj.click();
			}

 

Java

public class downloadRule extends DatasetRule{

	@Override
	public void doEvent() throws Throwable {
		IMessage msg = this.getMessage().get();
		HttpSession session = msg.getSession();
		// http://localhost:10040/do?r=downloadRule&mes_doc_id=aa&file_name=bb&userId=cc&token=dd
		String file_id = session.getParameter("file_id");
		String file_name = session.getParameter("file_name");
		String file_path = session.getParameter("file_path");
		String userId = session.getParameter("userId");
		String token = session.getParameter("token");

		String decFileName = URLDecoder.decode(file_name, "UTF-8");
		HttpServletResponse response = session.getResponse();
		String[] filePathConfirm = file_path.split("/");
		String fc = filePathConfirm[filePathConfirm.length-2];
		
		String mime = "application/octet-stream";
		File file = new File(file_path+"//"+file_id);
		InputStream is = null;

		String decFileName2 =  URLEncoder.encode(file_name, "UTF-8");
		decFileName2 = decFileName2.replaceAll("\\+", "%20");
		response.setContentType( "application/download; UTF-8" );
        response.setContentLength((int) file.length());
        response.setHeader("Content-Disposition", String.format("inline; filename=\"%s\"", decFileName2));
        response.setHeader("Content-Type", "application/octet-stream");                
        response.setHeader("Content-Transfer-Encoding", "binary;");
        response.setHeader("Pragma", "no-cache;");
        response.setHeader("Expires", "-1;");

		BufferedInputStream fin = null;
		BufferedOutputStream outs = null;

		try {
			is = new FileInputStream(file);
			IOUtils.copy(is, response.getOutputStream());
			msg.getParameter().set("U$EVENT_IGNOREREPLY", true);

		} catch (Exception e) {
			Log.error(FileDownloadToUrlForBMP.class, "", e);
			e.printStackTrace();
		} finally {
			if(is !=null) {
				is.close();
			}
			
		}



		
	}
}