HTTP Request Headers

HTTP headers sent in the request from the web browser or other client software to the web server
Accept:
a list of media types that the client can accept in the response from the server, with optional quality factor values indicating the client's relative preference from 0.0, which is least preferable, to 1.0, which is most preferable
Accept: application/xhtml+xml;q=1.0,text/html;q=0.9,image/png,image/jpeg,image/gif,*/*;q=0.1
Accept-Charset:
a list of character sets that the client can accept, with optional quality factor values indicating the client's relative preference from 0.0, which is least preferable, to 1.0, which is most preferable
Accept-Charset: iso-8859-1;q=1.0,utf-8;q=0.7,utf-16;q=0.5,*;q=0.1
Accept-Encoding:
Accept-Encoding: gzip,deflate
Accept-Language:
Accept-Language:en-us,en;q=0.5
Cache-Control:
Content-Length:
Content-Type:
media type of the content in the body of the request, for POST and PUT requests
Host:
host name or IP address from the URL being requested (the part just after the http:// or other protocol scheme
Host: www.exampleonly.com
Referer:
Referer: http://www.exampleonly.com/index.html
User-Agent:
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET CLR 1.1.4322; InfoPath.1; .NET4.0C)
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.7 (KHTML, like Gecko) Chrome/7.0.517.44 Safari/534.7
Opera/9.80 (Windows NT 6.1; U; en) Presto/2.6.30 Version/10.63