HTTP headers

These are the headers your browser carries along (at this moment):

HTTP_ACCEPT: text/html,application/xhtml+xml,text/xml;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
HTTP_ACCEPT_CHARSET: ISO-8859-1,utf-8;q=0.7,*;q=0.7
HTTP_ACCEPT_ENCODING: gzip
HTTP_ACCEPT_LANGUAGE: en-us,en;q=0.5
HTTP_CACHE_CONTROL: no-cache
HTTP_CONNECTION: close
HTTP_COOKIE: PHPSESSID=606423add85dd8f98f0f1df0fbf38a91
HTTP_HOST: krijnhoetmer.nl
HTTP_PRAGMA: no-cache
HTTP_USER_AGENT: CCBot/1.0 (+http://www.commoncrawl.org/bot.html)
HTTP_X_CC_ID: ccc03-01

A huge problem for content negotiation is that Internet Explorer sends HTTP_ACCEPT: */*. Bah :(

Thanks Mathias Bynens for your remarks ;)