UploadController

package com.avrist.avrist.controller;

import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.Resource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.support.ServletUriComponentsBuilder;

import com.avrist.avrist.models.UploadFile;
import com.avrist.avrist.service.StorageService;
import org.apache.commons.io.FilenameUtils;

@CrossOrigin(origins = "*", maxAge = 3600, allowedHeaders = "*")
@RestController
@RequestMapping("/api")
public class UploadController {
	@Autowired
    StorageService storageService;

    List<String> files = new ArrayList<String>();

    @PostMapping("/image")
    public UploadFile handleFileUpload(@RequestParam("file") MultipartFile file, @RequestParam("url") String url) {

    	try {

            String filename = file.getOriginalFilename();
            UUID   randomName = UUID.randomUUID();
    		String hashName = randomName + "."+FilenameUtils.getExtension(filename);

            files.add(file.getOriginalFilename());
            String Name 	= "/"+ url + "/" + hashName;
            String fileName = file.getOriginalFilename();
            String fileType = file.getContentType();
            Long fileSize = file.getSize();
            String fileDownloadUri = ServletUriComponentsBuilder.fromCurrentContextPath()
                    .path("/api/image/"+ url + "/")
                    .path(hashName)
                    .toUriString();
            storageService.store(file, url, hashName);
            return new UploadFile(Name, fileDownloadUri, fileType, fileSize);
        } catch (Exception e) {
            return new UploadFile("", "", "", file.getSize());
        }
    }

    @GetMapping("/image/{folder}/{filename:.+}")
    @ResponseBody
    public ResponseEntity<Resource> getFile(@PathVariable String filename, @PathVariable String folder) {
        Resource file = storageService.loadFile(folder, filename);
        return ResponseEntity.ok()
                .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + file.getFilename() + "\"")
                .body(file);
    }
}