#!/bin/bash

url=http://uploader/
bstr="--bstr"`date +%s`
rm -f test.out test.post index.html*
dd if=/dev/random of=test.out bs=1024 count=1
md5sum test.out

(
printf -- "--$bstr\r\n"
printf "Content-Disposition: form-data; name=\"uploaded_file\"; filename=\"a.dat\"\r\n"
printf "Content-Type: application/octet-stream\r\n"
printf "\r\n"
cat test.out
printf "\r\n"
printf -- "--$bstr--\r\n"
) > test.post

wget $url --header="Content-Type: multipart/form-data; boundary=$bstr" \
--post-file=test.post --proxy=off -S