Spring - download response as a file

Question

I am writing application using AngularJS and Spring. I would like to send request to the server and download response returned from controller as a file. In controller I hav

Answer 1

It's working for me :

• Spring controller : DownloadController.java

  package com.mycompany.myapp.controller;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.apache.commons.io.IOUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.http.HttpStatus;
  import org.springframework.http.ResponseEntity;
  import org.springframework.web.bind.annotation.ExceptionHandler;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestMethod;
  import org.springframework.web.bind.annotation.RequestParam;
  import org.springframework.web.bind.annotation.RestController;
  
  import com.mycompany.myapp.exception.TechnicalException;
  
  
  @RestController
  public class DownloadController {
  
      private final Logger log = LoggerFactory.getLogger(DownloadController.class);
  
      @RequestMapping(value = "/download", method = RequestMethod.GET)
      public void download(@RequestParam ("name") String name, final HttpServletRequest request, final HttpServletResponse response) throws TechnicalException {
          log.trace("name : {}", name);
  
          File file = new File ("src/main/resources/" + name);
          log.trace("Write response...");
          try (InputStream fileInputStream = new FileInputStream(file);
                  OutputStream output = response.getOutputStream();) {
  
              response.reset();
  
              response.setContentType("application/octet-stream");
              response.setContentLength((int) (file.length()));
  
              response.setHeader("Content-Disposition", "attachment; filename=\"" + file.getName() + "\"");
  
              IOUtils.copyLarge(fileInputStream, output);
              output.flush();
          } catch (IOException e) {
              log.error(e.getMessage(), e);
          }
  
      }
  
  }
  

• AngularJs Service : download.service.js

  (function() {
      'use strict';
  
      var downloadModule = angular.module('components.donwload', []);
  
      downloadModule.factory('downloadService', ['$q', '$timeout', '$window',
          function($q, $timeout, $window) {
              return {
                  download: function(name) {
  
                      var defer = $q.defer();
  
                      $timeout(function() {
                              $window.location = 'download?name=' + name;
  
                          }, 1000)
                          .then(function() {
                              defer.resolve('success');
                          }, function() {
                              defer.reject('error');
                          });
                      return defer.promise;
                  }
              };
          }
      ]);
  })();
  

• AngularJs config : app.js

  (function() {
      'use strict';
  
      var myApp = angular.module('myApp', ['components.donwload']);
     /* myApp.config([function () {
  
      }]);
      myApp.run([function () {
  
      }]);*/
  
  
  })();
  

• AngularJs controller : download.controller.js

  (function() {
      'use strict';
  
      angular.module('myApp')
          .controller('DownloadSampleCtrl', ['downloadService', function(downloadService) {
              this.download = function(fileName) {
                  downloadService.download(fileName)
                      .then(function(success) {
                          console.log('success : ' + success);
                      }, function(error) {
                          console.log('error : ' + error);
                      });
              };
          }]);
  })();
  

• index.html

  
  
  
  
      
      
      
      
  
  
  
      
  
          Download