Our programmers need the ability to view the browser type and operating system from the incoming request.  I cannot seem to find the information.  Our configuration consists of an Application server behind the firewall and a webserver infront of the firewall.  How can we get the information from the initial http header passed through to the app server?

the http request header usually have this data:

GET /dumprequest HTTP/1.1
Host:
User-Agent:
Accept:
Accept-Language:
Accept-Encoding:
Accept-Charset:
Keep-Alive:
Connection:
Referer:

the User-Agent is the one that tells the browser type its like:

User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.13) Gecko/20101203 (CK-IBM) Firefox/3.6.13 GTB7.1 ( .NET CLR 3.5.30729)