I would like to send a File object along with custom model object in a single request.
let formData:FormData = new FormData();
let file = this.fileList[0];
formData.append('file', file, file.name);
formData.append('address', JSON.stringify(customObj));
...
this.http.post(fileServeUrl, formData)
My backend is in Spring Rest as below
#RequestMapping(value = "/fileServe",
produces = {"application/json"},
consumes = {MediaType.APPLICATION_JSON_VALUE, MediaType.MULTIPART_FORM_DATA_VALUE},
method = RequestMethod.POST)
ResponseEntity<Image> uploadFile(#RequestPart("file") MultipartFile imageData, #RequestPart("address") Address address) throws IOException {...}
I was able to receive the data if I pass simple String along with File though.
formData.append('file', file, file.name);
formData.append('address', addressText);
Backend
#RequestMapping(value = "/fileServe",
produces = {"application/json"},
consumes = {MediaType.APPLICATION_JSON_VALUE, MediaType.MULTIPART_FORM_DATA_VALUE},
method = RequestMethod.POST)
ResponseEntity<Image> uploadFile(#RequestPart("file") MultipartFile imageData, #RequestPart("address") String addressText) throws IOException {...}
I tried #RequestBody for my custom object but even that didn't work. Any advise please.
The problem with #Requestbody and #RequestPart annotation is that spring use the HttpMessageConverter to take convert the incoming json message into the your object. As you send form data with a file and a text value spring can not convert it into your object. I am afraid you have to pass the value of address seperatetly.
#RequestMapping(value = "/fileupload", headers = ("content-type=multipart/*"), method = RequestMethod.POST)
public ResponseEntity<AjaxResponseBody> upload(#RequestParam("file") MultipartFile file, #RequestParam String name, #RequestParam String postCode) {
AjaxResponseBody result = new AjaxResponseBody();
HttpHeaders headers = new HttpHeaders();
if (!file.isEmpty()) {
try {
Address address = new Address();
address.setName(name);
result.setMsg("ok");
return new ResponseEntity<AjaxResponseBody>(result, headers, HttpStatus.OK);
} catch (Exception e) {
return new ResponseEntity<AjaxResponseBody>(HttpStatus.BAD_REQUEST);
}
} else {
return new ResponseEntity<AjaxResponseBody>(HttpStatus.BAD_REQUEST);
}
}
Expept if you find a way your client app send a file with MimeType of image/jpg and and an address of application/json which allow spring to parse the json and map to your Address object which i couldn't do it.
Related
Let's assume I have an endpoint looking like the one below:
#PostMapping(
value = "/something",
consumes = MULTIPART_FORM_DATA_VALUE,
produces = APPLICATION_JSON_VALUE)
public SomeDTO post2Files(
#RequestPart("file1") MultipartFile file1,
#RequestPart("file2") MultipartFile file2 {
In another service I want to read one file from the file system and just resend it, while the file2 is actually a string that I wanna pass as a file through RestTemplate.
I tried something like this:
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.MULTIPART_FORM_DATA);
MultiValueMap<String, Object> body = new LinkedMultiValueMap<>();
body.add("file1", new FileSystemResource(somePath));
body.add("file2", new ByteArrayResource(someString.getBytes()));
restTemplate.postForObject("/something", new HttpEntity<>(body, headers), SomeDTO.class)
It doesn't work and I have no clue why. I get 400. What should I do to make the request pass through?
Figured it out.
This is the solution:
body.add("dataSchema", new ByteArrayResource(someString.getBytes()) {
#Override
public String getFilename() {
return "file2";
}
});
It didn't work because the filename did not match with the #RequestPart.
I want to create a controller which will sent to client a CSV file, and I created the next controller:
#ResponseStatus(value = HttpStatus.OK)
#RequestMapping(value = "/csv", method = RequestMethod.GET)
public ResponseEntity downloadCsvAllInvoiceTransactionsByFilter(
#PageableDefault(direction = DESC, sort = "invoiceDate", size = 30) Pageable pageRequest) throws IOException {
String someVariable = "Some text";
byte[] out = someVariable.getBytes(Charset.forName("UTF-8"));
HttpHeaders responseHeaders = new HttpHeaders();
LOGGER.info(new String(out));
responseHeaders.add("content-disposition", "attachment; filename=transactions.csv" );
responseHeaders.add("Content-Type","text/csv; charset=utf-8");
return new ResponseEntity<>(out,responseHeaders,HttpStatus.OK);
}
Logger is displaying the correct string:
Some text
but in downloaded file there is another one
U29tZSB0ZXh0
How can I fix this?
Body of ResponseEntity goes through a message converter before it gets sent. The choice of the particular converter depends on class of the body and response and request headers.
I tried to reproduce the issue with your code snippet and got expected text in csv file. So I assume that you got a message converter registered that converts byte arrays the way you observe.
You can debug AbstractMessageConverterMethodProcessor#writeWithMessageConverters and see which converter is chosen and why.
i have a rest api that accept a String in POST and return an object,
this is the method:
#RequestMapping(method = RequestMethod.POST, value = "/aValue", headers = "Accept=application/json")
public #ResponseBody
MyObject getMyObject(#RequestBody String string) {
MyObject response = myService.getMyObject(string);
return response;
}
now when i call the api from another service for example, if I do POST like this it gave me always 400 Bad Request:
List<Object> providers = new ArrayList<Object>();
providers.add(jsonProvider);
WebClient client = WebClient.create(baseUrl + myAPI, providers);
client.type(MediaType.APPLICATION_JSON);
client.accept(MediaType.APPLICATION_JSON);
MyObject response = client.post(userId, MyObject.class);
return response;
instead of the working solution i used which is this one:
MyObject response = client.post("\"" + userId + "\"", MyObject.class);
someone could help me ? thanks guys
You're having an issue 'cause what you're posting is not a valid JSON, yet you indicate that it is in your client-side code. As you seem to pass just a simple string property userId you can simply change your mapping to receive plain text by adding consumes = "text/plain",
#RequestMapping(method = RequestMethod.POST, value = "/aValue", headers = "Accept=application/json", consumes = "text/plain")
public #ResponseBody
MyObject getMyObject(#RequestBody String string) {
and have your client send plain text, so
client.type(MediaType.TEXT_PLAIN);
I have a controller with a method to upload files, using, on the client side, the dojo Uploader class that supports ajax uploads for all browsers except IE, and uploads with an IFrame for IE.
The result is a JSON object, but when the IFrame mechanism is used, the JSON must be enclosed in a <textarea>:
#RequestMapping(value = "/documentation/{appId:.+}/", method = RequestMethod.POST)
#ResponseBody
public String uploadDocumentation(HttpServletRequest request,
#PathVariable String appId, #RequestParam("uploadedfile") MultipartFile file)
throws Exception {
// ....
String json = JsonUtils.jsonify(map);
if (accepts(request, "application/json")) {
return json;
} else if (accepts(request, "text/html")) {
return "<textarea>" + json + "</textarea>";
} else {
throw new GinaException("Type de retour non supporté");
}
I was wondering if there is a way to register this encoding mechanism in the framework, so that we would just have to return an object, and let the framework do the rest.
Thanks in advance.
For the record, I simply added a second method:
#RequestMapping(value = "/documentation/{appId:.+}/", method = RequestMethod.POST,
produces="application/json")
#ResponseBody
public UploadResult uploadDocumentation(#PathVariable String appId,
#RequestParam("uploadedfile") MultipartFile file) throws Exception {
...
return new UploadResult(filename);
}
#RequestMapping(value = "/documentation/{appId:.+}/", method = RequestMethod.POST,
produces="text/html")
#ResponseBody
public String uploadDocumentationIE(#PathVariable String appId,
#RequestParam("uploadedfile") MultipartFile file) throws Exception {
UploadResult obj = uploadDocumentation(appId, file);
String json = JsonUtils.jsonify(obj);
return "<textarea>" + json + "</textarea>";
}
It will call another REST API with a GET request.
#RequestMapping(value = "xxxx/{id}", method = RequestMethod.GET)
public #ResponseBody GetObjet GET( #PathVariable("id") String id,
#RequestHeader(value="X-Auth-Token") String Token) {
RestTemplate restTemplate = new RestTemplate();
HttpHeaders headers = new HttpHeaders();
headers.add("X-Auth-Token", Token);
HttpEntity entity = new HttpEntity(headers);
ResponseEntity<GetObjet> response = restTemplate.exchange(url, HttpMethod.GET, entity, GetObjet.class);
return response.getBody();
}
Always 400 Error. It means that bad request or some errors in the request body. But this is GET so the resquest bodys is always empty. So this way to add header may be not right. Any ideas?
You can obtain the headers including the notation #RequestHeader in your method
public void displayHeaderInfo(#RequestHeader("Accept-Encoding") String encoding,
#RequestHeader("Keep-Alive") long keepAlive) {
}
o
You can read more about the request here
And the other way to abtain the URL is:
#RequestMapping(value = "/restURL")
public String serveRest(#RequestBody String body, #RequestHeader HttpHeaders headers){
//Use headers to get the information about all the request headers
long contentLength = headers.getContentLength();
...
StreamSource source = new StreamSource(new StringReader(body));
YourObject obj = (YourObject) jaxb2Mashaller.unmarshal(source);
...
}
Try using:
RestTemplate.getForEntity(url, GetObject.class);
You have some methods to request data from a rest API, such as getForEntity and getForObject, use the one you needed.