Can not upload file when using a swagger generated spring server

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daniel....@googlemail.com

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Nov 9, 2018, 9:11:48 AM11/9/18

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Hello,

I already posted this question on stackoverflow, but nobody answered it there (https://stackoverflow.com/questions/53189770/can-not-upload-file-when-using-a-swagger-generated-spring-server). So I hope that someone on the dedicated servers will be able to help me.

I want to implement a file readout function on my REST Service. Since I do not know how to use spring myself, I use swagger to generate the server code for me. Normally this works perfectly fine, but when I try to upload files I get the following error:

    {
    "timestamp": "2018-11-07T12:27:43.119Z",
    "status": 400,
    "error": "Bad Request",
    "exception":   "org.springframework.web.multipart.support.MissingServletRequestPartException",
    "message": "Required request part 'file' is not present",
    "path": "/requirements/import"
    }

My yaml uses the following lines for the import function:

  /requirements/import:
    post:
      consumes:
      - multipart/form-data
      description:
        Returns all requirements contained in the submitted reqIf file.
      parameters:
      - name: reqIfFile
        in: formData
        type: file
        description: The reqIf file that contains the requirements.
      responses:
        200:
          description: An array of requirements.
          schema:
            type: array
            items:
              $ref: 'requirement'

The generated interface (with some added exceptions):

  @javax.annotation.Generated(value = "io.swagger.codegen.languages.SpringCodegen", date = "2018-04-05T07:19:00.887Z")

    @Api(value = "requirements", description = "the requirements API")
    public interface RequirementsApi {

    @ApiOperation(value = "", nickname = "requirementsImportPost", notes = "Returns all requirements contained in the submitted reqIf file.", response = Requirement.class, responseContainer = "List", tags = {})
    @ApiResponses(value = {
            @ApiResponse(code = 200, message = "An array of requirements.", response = Requirement.class, responseContainer = "List") })
    @CrossOrigin(origins = "*")
    @RequestMapping(value = "/requirements/import", produces = { "application/json" }, consumes = {
            "multipart/form-data" }, method = RequestMethod.POST)
    ResponseEntity<List<Requirement>> requirementsImportPost(
            @ApiParam(value = "file detail") @Valid @RequestPart("file") MultipartFile reqIfFile)
            throws IOException, ContinuumException;

}

The code that actually does the readout:

   @javax.annotation.Generated(value = "io.swagger.codegen.languages.SpringCodegen", date = "2018-04-05T07:19:00.887Z")

    @Controller
    public class RequirementsApiController implements RequirementsApi {

    @Override
    public ResponseEntity<List<Requirement>> requirementsImportPost(
            @ApiParam(value = "file detail") @Valid @RequestPart("file") final MultipartFile reqIfFile)
            throws IOException, ContinuumException {

        InputStream fileStream = new BufferedInputStream(reqIfFile.getInputStream());
        List<Requirement> list = ReadReqIF.readReqIfFile(fileStream);
        return new ResponseEntity<List<Requirement>>(list, HttpStatus.OK);
    }

}