After the HTML of a page is requested by a browser, the browser requests the embedded objects referenced in the HTML of that page from a web server to fill in the page shown by the browser.
By using the override feature provided in the content-type filtering capabilities of Sensor (appending “Log=1” to the query string of an embedded object request URL), that particular embedded object request and the related measurement data can be acquired without requiring the site manager to store all requests of that type (for example, all
Sensor collects the measurement data in the following table for each embedded object request made of the web server, assuming that Sensor is not configured to filter it out or that the filter has been overridden. The collected information is related to the visitor and session and subsequent sessions through the x-trackingid or cs(cookie) log field entries.
|W3C Name||Data Collected||Explanation||Example|
|x-trackingid||Tracking Identifier (unique visitor)||Identifier read from a cookie placed in the user’s browser by Sensor on initial request||V1st=3C94007B4E01F9C2|
|Timestamp||Time at which request was processed by server (at 100ns precision; accuracy depends on server environment and NTP)||2002-11-21 17:21:45.123|
|sc(content-Type)||Content Type||Type of object returned from server||text/html|
|sc-status||HTTP Response Status Code||Numerical code generated by the server that notes the status of the HTTP server's response||200|
|cs-uri-stem||URI Stem||The “stem” portion of the URI requested by the client||pagedir/page.asp|
|c-ip||Client IP||IP Address of the requesting client||127.0.0.1|
|s-dns||Server Domain Name||Domain name of the web server processing the request||www.domain.com|
|cs(referrer)||Referring URL||Contents of the HTTP referrer field sent by the client||http://www.referringsite.com|
|cs(user-agent)||User Agent||Device used to make a request to the HTTP server||
|cs(cookie)||Client Cookies from Domain||Contents of all of the user’s cookies for the site||
|cs-uri-query||Query String||The query string portion, if any, of the URI requested by the client||PAGENAME=dynamic1&link=3001|