To track clicks using your own click-tracking server, you must include an attribute in the ad tags that specifies the URL for the server. The URL is accessed every time that a user clicks on an ad, enabling your server to count the click. This attribute is click=value, where value is the URL for the clicktracking server. The click-tracking URL should not contain any semicolons (;). If necessary, you can encode semicolons as the equivalent %3B characters.
The sample URL below shows an ad tag with an implemented click attribute:
http://ad.doubleclick.net/adi/N270.maheshdfasite/B3140338.2;dcopt=1_ist;click=http://site.com/cgi/clicktrack?clickid=12345&page=abcd&goto=;sz=0x0;ord=[timestamp]?
Additionally, the click= attribute of an ad tag can include a value that defines the number of times a tag escapes an exit URL. This provides flexibility for servers that expect either escaped or un-escaped URLs.
- click= functions as current, searches for ? or & in ad tag and escapes exit URL once
- click0= does not run the escape algorithm, leaving exit URL as is
- clickN= escapes an exit URL N times, up to a maximum of three escapes.
The URL below shows an ad tag with a clickN= value of two escapes, before the ad tag is implemented:
http://ad.doubleclick.net/adi/N270.maheshdfasite/B3140338.2;dcopt=1_ist;click2=http://www.doubleclick.com/?;sz=0x0;ord=[timestamp]?
When a user clicks on the ad and the tag is implemented, the exit URL http://www.dartmotif.com is escaped twice. The ad tag then looks like the URL below:
http://ad.doubleclick.net/adi/N270.maheshdfasite/B3140338.2;dcopt=1_ist;click2=http://site.com/?http:%252F%252Fwww%252Edartmotif%252Ecom