Download von Browser-Dateien speichert auf Server durch Rest Web-Dienste

Question

Ich habe ein Projekt basierend auf Spring (Feder Sicherheit, Feder-Controller und MVC) so in meiner HTML-Seite muss ich Datei herunterladen erlauben. Wenn Benutzer klicken Sie auf diese:

<a href="#" target="'+row.idCar+'" id="logName" name="logDownload"> <i class="fa fa-file-text-o fa-2x" aria-hidden="true"></i></a>' 

I-Ereignis behandeln und diesen Code verwenden, basierend auf jquery plugin

var input = $(this), 
     idCar= $(this).attr('target'); 
     $.fileDownload("../download/" + idCar , { 
      successCallback: function (url) { 
      }, 
      failCallback: function (HttpServletResponse, url) { 
       notifyMessage("Error downloading file", 'error'); 
      } 
     }); 
     return false; //this is critical to stop the click event which will trigger a normal file download! 

In meinem Controller:

@Override 
@RequestMapping(value="/download/{idCar}", method = RequestMethod.GET) 
public void download(HttpServletResponse response, @PathVariable("idCar") int idCar) { 
    try{ 
     File file = fleetAndCarService.getLogFile(idCar); 
     try(InputStream is = new FileInputStream(file.getAbsolutePath())) { 
      response.setHeader("Set-Cookie", "fileDownload=true; path=/"); 
      response.setHeader("Content-Disposition", 
         "attachment; filename=\"" + "AcquisitionLog.txt" + "\""); 
      org.apache.commons.io.IOUtils.copy(is, 
         response.getOutputStream()); 
      response.flushBuffer(); 
     } catch (Exception e1) { 
      ErrorResponse errorResponse= ErrorResponseBuilder.buildErrorResponse(e1); 
      LOG.error("Threw exception in FleetAndCarControllerImpl::download :" + errorResponse.getStacktrace()); 
     } 
    }catch(Exception e){ 
     ErrorResponse errorResponse= ErrorResponseBuilder.buildErrorResponse(e); 
     LOG.error("Threw exception in FleetAndCarControllerImpl::download :" + errorResponse.getStacktrace()); 
    } 
} 

Aber es hat Problem mit Spring Security wie Dieser Beitrag x-frame und auf Internet Explorer funktioniert nicht. So gibt es eine Möglichkeit, die auf meinem Server gespeicherte Datei ohne Plug-in herunterzuladen? Dank

BESCHLOSSEN: Hansraj mir geholfen, und das ist der Arbeitscode:

try{ 
      File file = fleetAndCarService.getLogFile(idCar); 
      try(InputStream is = new FileInputStream(file.getAbsolutePath())){ 
       response.setHeader("Expires", "0"); 
       response.setHeader("Cache-Control","must-revalidate, post-check=0, pre-check=0"); 
       response.setContentType("text/plain"); 
       response.setHeader("Content-Description"," File Transfer"); 
       response.setHeader("Content-Disposition","attachment; filename="+"AcquisitionLog.txt"); 
       response.setHeader("Content-Transfer-Encoding"," binary"); 
       long size = Utils.stream(is, response.getOutputStream()); 
       response.addHeader("Content-Length", Long.toString(size)); 
       response.flushBuffer(); 
      }catch (Exception e1){ 
       ErrorResponse errorResponse= ErrorResponseBuilder.buildErrorResponse(e1); 
       LOG.error("Threw exception in FleetAndCarControllerImpl::download :" + errorResponse.getStacktrace()); 
      } 
     }catch (Exception e) { 
      ErrorResponse errorResponse= ErrorResponseBuilder.buildErrorResponse(e); 
      LOG.error("Threw exception in FleetAndCarControllerImpl::download :" + errorResponse.getStacktrace()); 
     } 

in dem HTML-I href mit der URL des Web-Service verwendet. Utils ist die Klasse in diesem post

Answer 1

Beispielcode vorgeschlagen, der für mich arbeitete. Sie können diese Probe versuchen

package com.mti.controller.booking; 

import java.io.ByteArrayInputStream; 
@Controller 
@RequestMapping(value = "/offlineBooking") 
public class OfflineBookingController { 
@RequestMapping(value = "/getInvoice") 
public void getInvoice(ModelMap modelMap, @RequestParam(value = "bookingId", required = true) Integer bookingId, 
     HttpServletResponse response) throws Exception { 
    Document document = new Document(); 
    InputStream is = null; 
    PdfWriter writer = null; 
    try{ 
    String everything = bookingService.getBookingInvoiceData(bookingId); 
    is = new ByteArrayInputStream(everything.getBytes("UTF-8")); 
    response.setHeader("Expires", "0"); 
    response.setHeader("Cache-Control","must-revalidate, post-check=0, pre-check=0"); 
    response.setHeader("Pragma", "public"); 

    response.setContentType("application/pdf"); 
    response.setHeader("Content-Description"," File Transfer"); 
    response.setHeader("Content-Disposition","attachment; filename="+"BookingInvoice"+ bookingId+".pdf"); 
    response.setHeader("Content-Transfer-Encoding"," binary"); 
    writer = PdfWriter.getInstance(document, response.getOutputStream()); 
    document.open(); 
    XMLWorkerHelper.getInstance().parseXHtml(writer, document, is); 
    writer.flush(); 
    response.flushBuffer(); 
    }catch (Exception e) { 
     logger.error("Error in generating invoice " , e); 
    }finally{ 
     if(writer!=null){ 
      writer.close(); 
     } 
     document.close(); 
     is.close(); 
    } 

} 

}