Refitter fails to generate FormData parameter for file upload

[richardhu-lmg]

Describe the bug

Refitter ignores the IFormFile parameter decorated with [FromForm] which is used for receiving file upload.
The controller parameter is completely missed in the generated refit interface method.

If it worked, the generated method would have [Multipart] as method annotation and StreamPart as the type for IFormFile parameter
https://github.com/reactiveui/refit#multipart-uploads

Support Key: 8hz0dgn

OpenAPI Specifications
"requestBody": {
"content": {
"multipart/form-data": {
"schema": {
"type": "object",
"properties": {
"formFile": {
"type": "string",
"format": "binary"
}
}
},
"encoding": {
"formFile": {
"style": "form"
}
}
}
}
}

Additional context

[christianhelle]

@richardhu-lmg thanks for taking the time to report this. Multi-part upload support is currently not implemented yet but I will add it to my to-do list

[richardhu-lmg]

@richardhu-lmg thanks for taking the time to report this. Multi-part upload support is currently not implemented yet but I will add it to my to-do list

Any estimate re when the fix will be implemented?

[christianhelle]

@richardhu-lmg thanks for taking the time to report this. Multi-part upload support is currently not implemented yet but I will add it to my to-do list

Any estimate re when the fix will be implemented?

@richardhu-lmg Sorry, I can't really honestly say when I'll implement this. I'll try looking into how complex this is tonight, and if it's simple enough, it will probably be done in a few minutes or hours. Otherwise, it will be completed when I find the time.

@richardhu-lmg You are more than welcome to give it a shot yourself and create a pull request, I'm very open and lenient regarding pull requests

[christianhelle]

@all-contributors please add @richardhu-lmg for bugs

[allcontributors]

@christianhelle

I've put up a pull request to add @richardhu-lmg! 🎉

[christianhelle]

I have an implementation where the following OpenAPI v3 specifications

{
   "openapi":"3.0.2",
   "paths":{
      "/foo/{id}/files":{
         "post":{
            "summary":"uploads a file",
            "operationId":"uploadFile",
            "parameters":[
               {
                  "name":"id",
                  "in":"path",
                  "description":"Id of the foo resource",
                  "required":true,
                  "schema":{
                     "type":"integer",
                     "format":"int64"
                  }
               }
            ],
            "requestBody":{
               "content":{
                  "multipart/form-data":{
                     "schema":{
                        "type":"object",
                        "properties":{
                           "formFile":{
                              "type":"string",
                              "format":"binary"
                           }
                        }
                     },
                     "encoding":{
                        "formFile":{
                           "style":"form"
                        }
                     }
                  }
               }
            },
            "responses":{
               "200":{
                  "description":"successful operation"
               }
            }
         }
      }
   }
}

Generates the following Refit interface

public interface IApiClient
{
    [Multipart]
    [Post("/foo/{id}/files")]
    Task UploadFile(long id, StreamPart formFile);
}

@richardhu-lmg Will this work for you?