url 에서 파일 다운로드 jsp

<%
/**
* @(#) download.jsp @version 2009. 12. 29.
*
*/%>
<%@ page contentType="text/html;charset=euc-kr"         %>
<%@ page import="javax.servlet.*"                       %>
<%@ page import="javax.servlet.http.*"                  %>
<%@ page import="java.io.*"                             %>
<%@ page import="java.util.*"                           %>

<%@ page import="java.net.*"                           %>
<%!
    public String getValue(String psValue){
        return (psValue != null ? (psValue.equals("null") ? "" : psValue) : "");
    }

    public String pathValidate(String value){
        if(value == null || value.length() < 1)
            return value;

        try {
            if(value.indexOf("../") > -1) {
                value = value.replaceAll(".[.]/", "");
            }
            else if(value.indexOf("..\\") > -1) {
                value = value.replaceAll(".[.]\\\\", "");
            }
        }catch(Exception ex) {
            //ex.printStackTrace();
        }

        return value;
    }
%>

<%
    String strFileName  = request.getParameter("fileName")!=null?request.getParameter("fileName"):"";
    String strDir       = request.getParameter("fileDir")!=null?request.getParameter("fileDir"):"";
    String strMsg       = "";

    if( strFileName.indexOf("\\")   > -1 ){ out.print("접근할수 없는 경로입니다."); return; }
    if( strFileName.indexOf(".jsp") > -1 ){ out.print("접근할수 없는 경로입니다."); return; }
    //if( strDir.indexOf("\\")   > -1 ){ out.print("접근할수 없는 경로입니다."); return; }
    //if( strDir.indexOf(".jsp") > -1 ){ out.print("접근할수 없는 경로입니다."); return; }

    String strFileName1 = "";
    String strFilePath  = "";
    strFilePath         = "";//PropertyManager.getProperty(WebCommon.WEB_BIZ_PROP, "FILE_UPLOAD_PATH");

    if( !strDir.equals("") ){
  //strDir =  strDir.replaceAll("/", "");
        strFilePath = strFilePath + strDir;
    }
 String strFileFullPath=strFilePath+strFileName;
 //strFileFullPath="http://192.168.1.44:8081/hkm/VersionHistory.txt";
 //strFileFullPath="/home/vmail/tomcat_kms_test/webapps/hkm/VersionHistory.txt";
 out.println(strFileFullPath);
    byte[] buffer                    = new byte[4096];
    File                    fileSave = new File(strFileFullPath);

 //   InputStream             isFile   = null;
    ServletOutputStream     osOut    = null;
 out.println(fileSave.getParent()+"+++"+fileSave.getName()); 
 

 

 try{

 

 

 URL url = new URL(strFileFullPath);
    URLConnection uc = url.openConnection();
    String contentType = uc.getContentType();
    int contentLength = uc.getContentLength();
 
   

    InputStream isFile = uc.getInputStream();
    BufferedInputStream in = new BufferedInputStream(isFile);

  /*if( !fileSave.isFile() ){
   strMsg = "파일이 존재하지 않습니다.";
   out.println(strMsg);

  }else{
   strFileName = strFileName.replaceAll("\\[", "");
  */ strFileName = strFileName.replaceAll("\\]", "");
   strFileName = strFileName.replaceAll(" ", "");

   String strClient = request.getHeader("User-Agent");
   if( strClient.indexOf("MSIE 5.5") != -1 ){
    response.setHeader("Content-Type", "doesn/matter;");
    response.setHeader("Content-Disposition", "filename=" + strFileName + ";");
   }else{
    response.setHeader("Content-Type", "application/octet-stream;");
    response.setHeader("Content-Disposition", "attachment;filename="+strFileName + ";");
   }
   
   //isFile      = new FileInputStream(fileSave);
   osOut       = response.getOutputStream();
   
   int nSize   = 0;

   try{

    byte[] _tmp = new byte[1024*2];

    while ((nSize = isFile.read(buffer)) != -1) {
     out.println(nSize);
     osOut.write(buffer, 0, nSize);
     osOut.flush();
    }
 
   }catch( Exception e ){
    //e.printStackTrace();
   }finally{
    osOut.close();
    isFile.close();
   }
  //}
 }catch ( Exception e){
  e.printStackTrace();
 }
%>