Setting HttpServletRequest headers

[Thomas Mcfarrow]

Hello,

I need to make a code stub for some SSO software that my company uses. I wan't to mimick its behavior by setting HttpServletRequest headers and forwarding it on. How could I set request headers?

Thanks.

[William Brogden]

If you are modifying an existing request, the servlet API provides the HttpServletRequestWrapper class to accomplsh this since you can't modify an existing request directly.
You create a custom wrapper that watches for getParameter calls specifying the parameters of interest.
If you are creating a new request, just implement the HttpServletRequest interface in your custom class.
Bill

[Fisher Daniel]

Hi,
I am curious about this...
Where we can modify a request using that request wrapper?
In a filter class or servlet class?

Correct me if my understanding is wrong
thanks
daniel

[Thomas Mcfarrow]

Hello, I don't want to modify the query string. I want to modify the HTTP header.

Thanks in advance.

[William Brogden]

Basically you use a Filter to substitute your custom request wrapper object for the original request.
Your custom wrapper will be what the servlet sees so every request for a header OR for a parameter OR for an input stream will go to your filter first.
Take a look at the javax.servlet.http.HttpServletRequestWrapper class JavaDocs to see how convenient the designers have made this capability.
Bill