>POST /diretorio/arquivo.pdf HTTP/1.1
>Host: www.exemplo.com
>User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; pt-BR; rv:1.9.2b5) Gecko/20091204 Firefox/3.6b5
>Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
>Accept-Language: pt-br,pt;q=0.8,en-us;q=0.5,en;q=0.3
>Accept-Encoding: gzip,deflate
>Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
>Keep-alive: 115
>Cookie: nome=valor; nome2=valor2
>Connection: keep-alive
>Content-Length: 28

...Aqui o servidor responderia ?