My client upload method:
public static void addPhoto(File photo) throws ParseException, IOException, InterruptedException {
HttpClient client = HttpClient.newBuilder().build();
HttpRequest request = HttpRequest.newBuilder()
.header("Content-Type","image/jpg")
.uri(URI.create(baseUrl + "data/addPhoto?date=4&category=temp&jwt="+jwt))
.PUT(HttpRequest.BodyPublishers.ofFile(photo.toPath()))
.build();
client.send(request, HttpResponse.BodyHandlers.ofString());
}
My Spring Boot method that receives the file:
@PutMapping(path = "/addPhoto")
public @ResponseBody
boolean addPhoto(@RequestParam(name = "jwt") String jwt,
@RequestParam("file") MultipartFile file,
@RequestParam(name = "date") long date,
@RequestParam(name = "category") String category) {
return crudService.addPhoto(jwt, date, file, category);
}
The current error:
2020-09-17 16:29:02.313 ERROR 8636 --- [nio-5000-exec-9] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.web.multipart.MultipartException: Current request is not a multipart request] with root cause
What kind of headers can I add to ensure my Spring Boot server receives the file without errors?
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Answer
MultipartException: Current request is not a multipart request
This is telling you what’s wrong.
In your code: .PUT(HttpRequest.BodyPublishers.ofFile(photo.toPath())), you are doing a PUT request with file’s byte array in BODY. But in your server, you are expecting it as MultipartFile. MultipartFile is a representation of uploaded file with additional data in the POST request body. https://en.wikipedia.org/wiki/MIME#Multipart_messages
You can simply do the following to upload your file:
Ref: https://ganeshtiwaridotcomdotnp.blogspot.com/2020/09/java-httpclient-tutorial-with-file.html
Send filename in request:
.uri(URI.create("http://localhost:8085/addPhoto?fileName=" + photo.getName()))
Receive byte array in RequestBody and fileName in RequestParam
@PostMapping(path = "/addPhoto")
public void addPhoto(@RequestBody byte[] barr,
@RequestParam(name = "fileName") String fileName) throws Exception {
System.out.println(" received file " + fileName + " length " + barr.length);
try (OutputStream os = new FileOutputStream(new File("UPL" + fileName))) {
os.write(barr);
}
}
If you must use MultipartFile then you can do sth similar to: