FileUpload not working with JSON data

[dheerajuppalapati]

I tried the example https://github.com/springfox/springfox-demos/blob/be4118bb031c8dcded514c33d74cae52fc51ff08/boot-swagger/src/main/java/springfoxdemo/boot/swagger/web/FileUploadController.java

Just changed the @RequestPart String description to @RequestBody Component component which should be a JSON input.

Here is the code sample
@RequestMapping(value = "/v1/component/fileupload", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_VALUE, consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
public Component fileComplaint(
@RequestBody Component component, @RequestPart MultipartFile file){
...........................
}

Here is what the swagger-ui looks like

Here is the request details

Here is the response details

Here are my questions:

1. I'm not sure why does say in swagger-ui. It should say "application/json" instead. How do i fix this?

2. If you request at the request paramaters, the data i'm putting in the "component" parameter is not being sent to the back-end. It only sends the file details.

3. How do i fix org.springframework.web.HttpMediaTypeNotSupportedException??

Any kind of help will be appreciated. I already checked out the suggestions in springfox/springfox#134 and it was of no help

Thanks,
Dheeraj

[dilipkrish]

Swagger-ui does not support multipart file upload

[dheerajuppalapati]

I'm guessing this is not the right place to ask questions about springfox?? Every-time I ask questions I get answers from you which do not make sense.

What does this mean "Swagger-ui does not support multipart file upload"?? Springfox is build on swagger and example you posted for sprinfox here https://github.com/springfox/springfox-demos/blob/be4118bb031c8dcded514c33d74cae52fc51ff08/boot-swagger/src/main/java/springfoxdemo/boot/swagger/web/FileUploadController.java is for Multipart file upload.

I asked a simple question and I keep getting ridiculous answer.

[NiteshMehta]

I am also facing similar problem with https://github.com/springfox/springfox-demos/blob/be4118bb031c8dcded514c33d74cae52fc51ff08/boot-swagger/src/main/java/springfoxdemo/boot/swagger/web/FileUploadController.java

When I modify @RequestPart String description to @RequestPart RequestObject requestObject

I am getting error
org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/octet-stream' not supported

Even the curl generated by swagger-ui produces same error, but once I add type=application/json to body problem is fixed
curl -X POST --header 'Content-Type: multipart/form-data' --header 'Accept: application/json' -F 'requestObject=@/req.json;type=application/json' 'http://localhost:8080/MyService/api/upload'

looking at swagger-api/swagger-core#636, it looks like swagger-ui have support to provide content-type for RequestPart.

springfox version 2.7.0
springboot Version 1.5.4.RELEASE

[dilipkrish]

Request parts, and multipart requests in general are not supported by swagger-ui. Atleast as of version 2.0 of the spec.

[NiteshMehta]

Hi Dilip,
I am confused here, isn't FileUploadController.java multipart request with two request parts ?

[dilipkrish]

It is but swagger-ui and OpenAPI spec in general doesnt support multipart requests well. FileUploadController is just to demonstrate that springfox tries to generate the right description

[NiteshMehta]

Thanks Dilip
FileUploadController.java actually works, but its just that when we change @RequestPart String description to @RequestPart RequestObject requestObject it produces following error org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/octet-stream' not supported

so does this means that it is partially supported?

[rajademo]

Dilip / Nitesh, any update on this issue.
I'm also facing the same issue. When i change @RequestPart String to @RequestPart Object, i'm getting the error.

[dilipkrish]

Multipart requests are not supported very well in Swagger-ui unfortunately

[ahmeterdem]

"Multipart requests are not supported very well in Swagger-ui unfortunately"
then for file upload instead of multipart file which data type can we use?