Checking User Agent !

Question

Hi,
We have a requirement that we need to redirect to the correct page by checking the user agent , we dont wanna use Akamai as per financial constraint.
How can we redirect the request to the appropriate jsp's , we dont wanna check the user agent in each page.
We are going to insert one pipeline servlet after the dynamo handler to check the user agent with the following code
DynamoHttpServletRequest.getHeader() ;
is this best way ? or is there any other efficient way to handle this requirement.
Thanks,

Answer 1

This sounds like the job for a session based component. Create a session based component that extends GenericService. In its doStartService method set the sessions user-agent string by accessing the current request (ie ServletUtil.getCurrentRequest()) and get the HTTP User-Agent header. Now you have a session based component that when started has a property that holds the sessions User-Agent string. Next create a pipeline servlet that resolves this session based component and access the user-agent string property. Here you can test the property and redirect if necessary.
This technique only calculates the user-agent once per session when the session based component is started. On subsequent requests the header is not checked because the session based component is started only once per session.
-Andrew