How to use ktor-swagger-ui 2.2.3 to generate openapi-spec that support multi-file upload.

[nartgg35665]

Hello, I am using ktor-swagger-ui 2.2.3 . Is there a way to generate openai-spec.json to support multi-file upload.

I did sth like this but it does not work.

  post(
        "/debugTech/sendEmail",
        {
            request {
                multipartBody {
                    mediaType(ContentType.MultiPart.FormData)
                    part<List<File>>("images") { mediaTypes = setOf(ContentType.Image.JPEG) }
                }
            }
        }
    ){...}

 install(SwaggerUI) {
        customSchemas {
            openApi("images") {
                Schema<Any>().also {
                    it.type = "string"
                    it.format = "binary"
                }
            }
        }
    }

[RowlenZen]

Hi @nartgg35665, try this sample (I copied this one from examples in repo):

request {
                multipartBody {
                    mediaTypes(ContentType.MultiPart.FormData)
                    part<File>("first-image",) {
                        mediaTypes(
                            ContentType.Image.PNG,
                            ContentType.Image.JPEG,
                            ContentType.Image.SVG
                        )
                    }
                    part<File>("second-image") {
                        mediaTypes(
                            ContentType.Image.PNG,
                            ContentType.Image.JPEG,
                            ContentType.Image.SVG
                        )
                    }
                }
            }

[nartgg35665]

Hello @RowlenZen ,

It was shown like this

I want the swaggerUI to enable user to select multiple file when clicking choose file button. Right now, I can choose only one.

[SMILEY4]

Hi @nartgg35665, sorry for the late response.

I'm a bit rusty with this version, but I think a possible solution for versions 2.x could look like this:

// define a custom json schema for an array of files
TypeOverwrites.entries[getSchemaType<Array<File>>()] = """
    {
        "type": "array",
        "items": {
            "type": "string",
            "format": "binary"
        }
    }
""".trimIndent()

install(SwaggerUI)

//...

post("list_of_files", {
    request {
        multipartBody {
            mediaType(ContentType.MultiPart.FormData)
            part<Array<File>>("images") { // use array of files as schema -> uses own defined json schema
                mediaTypes = setOf(
                    ContentType.Image.PNG,
                    ContentType.Image.JPEG,
                    ContentType.Image.GIF
                )
            }
        }
    }
}) {
    call.respond(HttpStatusCode.NotImplemented, "...")
}