On 13.10.2016 17:04, Campbell, Lance wrote:
Tomcat 8.0.38

In my Eclipse development environment when particular servlet requests are made 
I want to simulate going through Shibboleth prior to Tomcat handling the 
request.  I wanted to see if this will work.

In Eclipse within each dynamic web application I would add a valve to the 
context.xml file.

The valve would:

1)      Check the URL request.

2)      If the URL string matches a list then it will add particular name value 
pairs to the request.

Example of a possible valve:

<Valve className="my.valves.ShibbolethSimulationValve" />

1)      Can a valve actually identify a particular URL path?

2)      Can a valve add an attribute to the request prior to the servlet 
getting the request?

3)      If item #1 and #2 will work does anyone have some base code for a value 
that would get me started down the correct path?


I think the best thing here is to point you to Google. If you search for "HttpServletRequest immutable", you'll get a whole bunch of useful links.
There is also example code there.

The basic thing here, is that the HttpServletRequest object that you get originally, is *immutable* (can't be modified, for example to add a header or add additional parameters). So you have to "wrap" it with a HttpServletRequestWrapper, and then override some of the standard methods in that wrapper.

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