POST file:///path/to/file.html
Accept-Encoding: gzip
Referer: file:///path/to/file.html
User-Agent: WWW-Mechanize/1.34
Content-Length: 70
Content-Type: application/x-www-form-urlencoded

headline=MyHeadline&thecontent=MyContent&categories%5Bsome_tag%5D=Blah