Multipart response for web service

» ruby-on-rails » Multipart response for web service

By : chitranjan singh

Date : November 25 2020, 07:27 PM

hope this fix your issue I don't know exactly what kind of front end you are using and what your browser compatibility requirements are, or you need the webservice for integration with other apps only, but assuming you are communicating with server over ajax and your app is running in modern browser (or you are allowed to use flash plugin), you can return file contents as base64 encoded string as a part of json response. So in rails controller you would have something like this:

code :

Share :

Jax-RS Multipart response

By : Riz920

Date : March 29 2020, 07:55 AM

will help you In Jersey you can use jersey-media-multipart module to make your life easier. Follow the documentation on this topic: Multipart section in Jersey User Guide or take a look at the available example multipart-webapp.

Constructing multipart response

By : tdalseide

Date : March 29 2020, 07:55 AM

wish help you to fix your issue Got it. You can also add complete response to a MultipartContent as well.

code :

MultipartContent content = new MultipartContent("mixed", "----Boundary");
content.Add(new HttpMessageContext(response1));
content.Add(new HttpMessageContext(response2));

How to send a multipart file to a service from another service

By : DADATA

Date : March 29 2020, 07:55 AM

hope this fix your issue I have two endpoints api which are /uploadand /redirect , This made the trick

code :

@RequestMapping(value = "/redirect", produces = { MediaType.APPLICATION_JSON_VALUE }, method = RequestMethod.POST)
    public ResponseEntity<?> registerBatchUser(@RequestParam("file") MultipartFile file) {
       if (!file.isEmpty()) {
            try {
                byte[] bytes = file.getBytes();
                BufferedOutputStream stream = new BufferedOutputStream(
                        new FileOutputStream(new File("D:\\myfileredirect.csv")));
                stream.write(bytes);
                stream.close();


            } catch (Exception e) {
                JwtAuthenticationErrorResponse FeedBackResponse = new JwtAuthenticationErrorResponse();
                FeedBackResponse.setCode(100);
                FeedBackResponse.setMessage(e.getMessage());
                Map<String, Object> FeedBackStatus = new HashMap<String, Object>();
                FeedBackStatus.put("status", FeedBackResponse);
                return ResponseEntity.ok(FeedBackStatus);
            }
        MultiValueMap<String, Object> parameters = new LinkedMultiValueMap<String, Object>();
        parameters.add("file", new FileSystemResource("D:\\myfileredirect.csv")); 
        HttpHeaders headers = new HttpHeaders();
        headers.set("Content-Type", "multipart/form-data");



        Map<String, Object> FeedBackStatus=new HashMap<String, Object>();
        FeedBackStatus =  restTemplateUserRegitration.exchange("http://localhost:8080/upload",  HttpMethod.POST,  new HttpEntity<MultiValueMap<String, Object>>(parameters, headers), Map.class).getBody();
        return ResponseEntity.ok(FeedBackStatus);

    }

How to parse and save a Multipart/related type=image/jpeg response? (Dicom Wado Response)

By : user3232723

Date : March 29 2020, 07:55 AM

help you fix your problem I figured out that I was parsing the multi-part response properly, but I had to use another library (library name : imagecodecs , method name : jpegsof3_decode) to decompresses individual part into the images. This is give a numpy array of the image. Here is the updated code

code :

reader = aiohttp.MultipartReader.from_response(response)
while True:
     part = await reader.next()
     if part is None:
              break
     data = await part.read()
     imageDecompressed = jpegsof3_decode(data)

success, encoded_image = cv2.imencode('.png',imageDecompressed)

imageInBytes = encoded_image.tobytes()

How to pass Multipart file from one service to another service in spring boot?

By : YanYan22

Date : March 29 2020, 07:55 AM

help you fix your problem At last able to solve the communication issue to the another service using the post File upload spring cloud feign client
I have changed the FeignClient parameter type from

code :

@PostMapping(value="/upload", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
        ResponseEntity<Properties> upload(@RequestHeader(name=UID,required=false) String uid, @RequestPart("file") MultiValueMap<String, Object> file);

@PostMapping(path="/upload")
    public ResponseEntity<Properties> uploadAttachment(@RequestHeader(IRSConsts.UID) String uid, @RequestParam("file") MultipartFile mFile) {
        MultiValueMap<String, Object> multiValueMap = new LinkedMultiValueMap<>();
        ByteArrayResource contentsAsResource = null;
        try {
            contentsAsResource = new ByteArrayResource(mFile.getBytes()) {
                @Override
                public String getFilename() {
                    return mFile.getOriginalFilename();
                }
            };
        } catch (IOException e) {
            e.printStackTrace();
        }
        multiValueMap.add("file", contentsAsResource);
        return transSvcClient.upload(uid, multiValueMap);
    }

@PostMapping(path = "/upload")
    @Headers("Content-Type: multipart/form-data")
    public ResponseEntity<Properties> upload(@RequestHeader(name = UID, required = false) String uid,
            @RequestPart("file") MultipartFile multiPart) {
        //Save Attachment.
    }