retrofit android - upload document using multi-part is throwing response code 422

Question

@POST
@Path("/")
@PreAuthorize("isFullyAuthenticated()")
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.APPLICATION_JSON)
@Transactional(propagation = Propagation.REQUIRED, isolation = Isolation.READ_COMMITTED)
public Response addAsset(
    @FormDataParam("file") InputStream uploadedInputStream,
    @FormDataParam("file") FormDataContentDisposition fileDetail,
    @FormDataParam("draftId") Long draftId) throws IOException
{
}

when used the chrome browser to look at the file upload request, it has the below in the "Form Data" section

------WebKitFormBoundaryaQvAp0c0jbhLq4af Content-Disposition: form-data; name="draftId"

------WebKitFormBoundaryaQvAp0c0jbhLq4af Content-Disposition: form-data; name="file"; filename="image1.png" Content-Type: image/png

------WebKitFormBoundaryaQvAp0c0jbhLq4af--

does this mean the value of "draftId" is null ?

should i send "draftId" and "file" as multipart ?

the retrofit code i have tried in Android Studio is provided below

retrofit API for upload document request:

@POST("resource/asset")
@Multipart
@Headers("Content-Type: multipart/form-data")
fun uploadFile(

        @Part draftId: MultipartBody.Part,
        @Part file: MultipartBody.Part
): Call<ResponseBody>

the code that sends the upload request is below:

private fun uploadFile1(fileUri: Uri?) {
  file = com.example.myapplication.utils.FileUtils.getFile(mContext, fileUri)
    // create RequestBody instance from file
    val filePart: RequestBody = RequestBody.create(
            MediaType.parse(activity!!.contentResolver.getType(fileUri!!)!!),
            file
    )

    // MultipartBody.Part is used to send also the actual file name
    val body = MultipartBody.Part.createFormData("file", file!!.name, filePart)
    val draft = MultipartBody.Part.createFormData("draftId",null, draftpp)
    val call = apiInterface.uploadFile(draft, body)
    
         call.enqueue(object : Callback<ResponseBody> {
        override fun onResponse(call: Call<ResponseBody>, response: Response<ResponseBody>) {
            Log.i("Upload", "success")
        }

        override fun onFailure(call: Call<ResponseBody>, t: Throwable) {
            Log.i("Upload error:", t.message)
        }
    })
}

i am getting response code 422, can someone please help me fix the issue ?

com.example.myapplication.utils.FileUtils.getFile() probably is incorrect. A Uri is not a file. See this blog post and this blog post for instructions for how to post a multipart form body using a Uri. — CommonsWare
when i passed requestBody(for draftId) and multiPart(for file) for the API, it started working val call = apiInterface.uploadFile(requestBody, bodyMultiPart) — Mukesh Raja J

Mukesh Raja J Mukesh Raja J · Accepted Answer · 2020-07-13T23:07:14

when i passed requestBody(for draftId) and multiPart(for file) for the API, it started working

val call = apiInterface.uploadFile1(draftIddd, body )

retrofit android - upload document using multi-part is throwing response code 422

1 Answers