Failed to parse multipart servlet request

[InglisDav]

I am uploading a file from Angular using Java 17 with Spring Boot 3.2 as backend.
I noticed that when I updated Spring 2.x.x it shows me a multipart error. I don't know if the implementation with Angular changed for this type of request. The code I use is the following:

Angular17:

UploadFile(id, file:File): Observable<any[]> {

  url = 'http://localhost:8080/import/"+id+"'; 
  
  const formData: FormData = new FormData();
  formData.append('uploadFile', file, file.name);

  var headers: HttpHeaders = new HttpHeaders(); 
  headers = headers.set('Content-type', 'multipart/form-data');


 this.http.combineHeaders(headers);
  
 return this.http.post(url, formData, 'UploadFile');
}

Java17:

@RequestMapping(value = "/import", method = RequestMethod.POST)
public ResponseEntity<Object> FileUpload(@PathVariable(value = "id") String Id, @RequestParam("uploadFile") MultipartFile uploadFile)
            throws IOException {

        //Here is processing uploadFile.
}

Error:

{errCode: 4000, errMsg: "Failed to parse multipart servlet request"} errCode : 4000 errMsg : "Failed to parse multipart servlet request"

The library imported is import org.springframework.web.multipart.MultipartFile;
But it's very confusing because even though I don't have the file reading implementation, just by receiving the file as @RequestParam, I get the error.

Is it possible that something has changed for the new versions of Spring with Angular?

Thank you!!

[bclozel]

Can you reproduce the problem with a curl command instead of Angular?
We are not aware of similar issues. Can you share a minimal sample application that reproduces the problem please ?

[rstoyanchev]

Your controller method has an @PathVariable parameter, but the mapping path doesn't have a placeholder for it. It is possible the 400 relates to that?

I suggest getting more logging information on the server side to find the reason for the 400 and the actual exception.

Is it possible that something has changed for the new versions of Spring with Angular?

You can vary the version of Spring and Angular independently to see which one causes the issue.

Generally, you need to investigate a bit further before opening an issue.

[spring-projects-issues]

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