@brentgordon146 I could help more if you had a runnable example, but I think you may need to quote the filename (e.g. filename="foo"), and I think you may be missing a CRLF at the beginning of the data, if I’m following correctly. I should really make it into a library, but I have an example of generating a multipart/form-data body here, if it helps: https://github.com/LiberalArtist/multipart-writing-examples/blob/78a7f65236d0d440a230f00f04308cf22899fda2/proxy.rkt#L230

thanks so much

i tried posting to pasterack but it keeps giving me an error