multipart.FileHeader mime type

[mlc-d]

Hello!

I'm trying to implement a file uploader with Echo. The example in the official documentation looks great, but then I want to restrict the file type that can be uploaded.

With the regular net/http package, there's this way to get the MIME filetype of it:

        file, multipartFileHeader, _ := r.FormFile("file") // (mulipart.File, *multipart.FileHeader, error)

        fileHeader := make([]byte, 512)

        if _, err := file.Read(fileHeader); err != nil {
                return err
        }

        log.Printf("%#v\n", http.DetectContentType(fileHeader))

However, when working with echo.Context, it has the c.FileHeader() method, which only returns a *multipart.FileHeader.

EDIT
Holy, I must had been out of my mind when I started this thread. with *multipart.FileHeader.Open() I already got the multipart.File that I need.

Is there a good way to check the file type using only echo.Context?
Thanks in advance!