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package io.modor.servlet;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
import java.util.UUID;
import java.io.File;

@WebServlet(name = "UploadServlet")
public class UploadServlet extends HttpServlet {
    
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    
        DiskFileItemFactory factory = new DiskFileItemFactory(20*1024, new File("F:/tmp/"));
        ServletFileUpload sfu = new ServletFileUpload(factory);
        sfu.setFileSizeMax(100000*1024);
        String rootPath = this.getServletContext().getRealPath("/WEB-INF/files/");
        try{
            List<FileItem> fileItemList = sfu.parseRequest(request);
            for(FileItem item : fileItemList){
                if(item.getContentType().equals("text/plain")){
                    String filename = item.getName();
                    int index = filename.lastIndexOf("\\");
                    if(index != -1){
                        filename = filename.substring(index+1);
                    }
                    String savename = UUID.randomUUID().toString().replace("-","")+"_"+filename;
                    int hCode = savename.hashCode();
                    String hex = Integer.toHexString(hCode);
                    File dirFile = new File(rootPath,hex.charAt(0)+"/"+hex.charAt(1));
                    dirFile.mkdirs();
                    File destFile = new File(dirFile,savename);
                    item.write(destFile);
                }
            }

        }catch (FileUploadException e){
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}