Is it possible to define an end point in a Controller with a RequestBody and a RequestPart? - spring-boot

Question

I need to create a single end point that accepts a RequestBody OR a RequestPart.
If the request contains the RequestPart it will execute some logic to process the MultipartFile otherwise it will process the object passed in the RequestBody.
I checked How to send #Requestbody and #Requestpart together in spring but it differs from my question because I don't want to send both, RequestBody and RequestPart, at the same time.
I defined my entry point as:
#RequestMapping(value="/xyz/api/{endPoint}", method= RequestMethod.POST)
public void endPointPost(
#PathVariable String endPoint,
HttpServletRequest request,
HttpServletResponse response,
#RequestBody(required=false) Object body,
#RequestPart(required=false) MultipartFile uploadFile) throws Exception {
If the request contains only the RequestBody it works correctly, for instance:
{"body":{"companyCD":"myTest"}}
However, when sending the multipart request it fails with the follwing error:
2019-10-18 00:50:43,440 DEBUG [http-nio-8080-exec-8] org.springframework.web.servlet.handler.AbstractHandlerMapping: Mapped to public void com.monoplus.mcd.rest.GenericController.endPointPost(java.lang.String,javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse,java.lang.Object,org.springframework.web.multipart.MultipartFile) throws java.lang.Exception
2019-10-18 00:50:43,440 INFO [http-nio-8080-exec-8] com.monoplus.mcd.rest.ServletControllerInterceptor: ServletControllerInterceptor - preHandle
2019-10-18 00:50:43,442 DEBUG [http-nio-8080-exec-8] org.springframework.web.method.support.InvocableHandlerMethod: Could not resolve parameter [3] in public void com.monoplus.mcd.rest.GenericController.endPointPost(java.lang.String,javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse,java.lang.Object,org.springframework.web.multipart.MultipartFile) throws java.lang.Exception: Content type 'multipart/form-data;boundary=----WebKitFormBoundaryG1Xr4xtC2rNYWuCd;charset=UTF-8' not supported
2019-10-18 00:50:43,446 DEBUG [http-nio-8080-exec-8] org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver: Using #ExceptionHandler public final org.springframework.http.ResponseEntity<java.lang.Object> org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler.handleException(java.lang.Exception,org.springframework.web.context.request.WebRequest) throws java.lang.Exception
2019-10-18 00:50:43,481 DEBUG [http-nio-8080-exec-8] org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor: No match for [text/html, application/xhtml+xml, image/webp, image/apng, application/signed-exchange;v=b3, application/xml;q=0.9, */*;q=0.8], supported: []
2019-10-18 00:50:43,482 DEBUG [http-nio-8080-exec-8] org.springframework.web.servlet.handler.AbstractHandlerExceptionResolver: Resolved [org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'multipart/form-data;boundary=----WebKitFormBoundaryG1Xr4xtC2rNYWuCd;charset=UTF-8' not supported]
2019-10-18 00:50:43,483 INFO [http-nio-8080-exec-8] com.monoplus.mcd.rest.ServletControllerInterceptor: ServletControllerInterceptor - afterCompletion - org.springframework.session.web.http.SessionRepositoryFilter$SessionRepositoryResponseWrapper#6c9a1e05
2019-10-18 00:50:43,484 DEBUG [http-nio-8080-exec-8] org.springframework.web.servlet.FrameworkServlet: Completed 415 UNSUPPORTED_MEDIA_TYPE
Please note that Could not resolve parameter [3]... refers to the RequestBody parameter.
This is my multipart request:
Header
Host: localhost:88
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:69.0) Gecko/20100101 Firefox/69.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: multipart/form-data; boundary=---------------------------262541039624932
Content-Length: 1401
Connection: keep-alive
Referer: http://localhost:88/appl/html/master/FileImport.html
Cookie: JSESSIONID=3f052417-1702-48b6-b7c2-cac5609ef525; SESSION=M2YwNTI0MTctMTcwMi00OGI2LWI3YzItY2FjNTYwOWVmNTI1
Upgrade-Insecure-Requests: 1
Pragma: no-cache
Cache-Control: no-cache
Body
-----------------------------262541039624932
Content-Disposition: form-data; name="uploadFile"; filename="testFile.txt"
Content-Type: text/plain
1 - File content
-----------------------------262541039624932
Content-Disposition: form-data; name="_ns"
-----------------------------262541039624932
Content-Disposition: form-data; name="_qt"
false
-----------------------------262541039624932
Content-Disposition: form-data; name="_body"
{"USER_NAME":""}
-----------------------------262541039624932--
Any help is appreciated.
Thank you

Answer 1

I'm thinking about this question from a RESTful point of view and not necessarily spring. If you are 1) trying to create or edit (post or put) a resource or 2) trying to upload a file; shouldn't those be two different URI Paths?

Answer 2

Thanks to Chris suggestion I was able to solve my question, I defined a different entry point for the Multipart content.
#RequestMapping(value="/xyz/api/{endPoint}", method= RequestMethod.POST, consumes = {"multipart/form-data"})
public void multiPartEndPointPost(
#PathVariable String endPoint,
HttpServletRequest request,
HttpServletResponse response
) throws Exception {
this.doSomeStuff(endPoint, request, response);
}
The important part is the consumes = {"multipart/form-data"} then I can use Apache Commons FileUpload to upload the files.
The answer for [Cannot use Apache Commons FileUpload with Spring Boot multipart.resolve-lazily also helped me to solve my question.