POST /upload HTTP/1.1
Host: localhost:8080
Content-Type: multipart/form-data; boundary=----TLV0SrKD4z1TRxRhAPUvZ
Content-Length: 178

------TLV0SrKD4z1TRxRhAPUvZ
Content-Disposition: form-data; name="upload"; filename="plain.txt"
Content-Type: text/plain

I am a plain text file

------TLV0SrKD4z1TRxRhAPUvZ
