[object File] instead file contents

gistfile1.txt

------pluploadboundaryp163rhf33011pf12pn1nbhgv11pvc4
Content-Disposition: form-data; name="name"

image-5.jpg
------pluploadboundaryp163rhf33011pf12pn1nbhgv11pvc4
Content-Disposition: form-data; name="authenticity_token"

r1oF2oAbeaGRT9Mnw+jCr9c0Jwwryv6je4m9vTo6YGc=
------pluploadboundaryp163rhf33011pf12pn1nbhgv11pvc4
Content-Disposition: form-data; name="_darim_session"

BAh7B0kiD3Nlc3Npb25faWQGOgZFRkkiJTJjYzY5YTMzYTRlOTkwODgyOWVkZGYzZTY4NTI5MTkyBjsAVEkiEF9jc3JmX3Rva2VuBjsARkkiMXIxb0Yyb0FiZWFHUlQ5TW53K2pDcjljMEp3d3J5djZqZTRtOXZUbzZZR2M9BjsARg==--2cb59d6cc217c04d7fd915c43befd51c35a12d89
------pluploadboundaryp163rhf33011pf12pn1nbhgv11pvc4
Content-Disposition: form-data; name="file"; filename="image-5.jpg"
Content-Type: image/jpeg

[object File]
------pluploadboundaryp163rhf33011pf12pn1nbhgv11pvc4--