Help on

Tue, 2 Jun 2009 12:44:16 -0700 (PDT)

My application server is fronted by a web server that strips off the
first part of the context. This is because there are different ways to
access this application, depending weather the web server is on the
Internet or the Intranet.

For example, when a browser calls,
the web server proxies the request to the app. server as /,
along with particular header variables depending on weather the
request came from /outside/ or /inside/. The app. server is basically
unaware of this, the application is on the ROOT.

One interesting thing is that the proxy plugs in a header variable
indicating what was stipped off. Like WL-PATH-TRIM=/outside

Now the problem is that there's a proprietary framework tag library
used to generate custom forms and links, which uses the application
context to set the action="" or href="" attribute of a <form> or a <a>
element. It deducts the value using the action mapping of Struts. "/". We can't modify that tag library.

So, the call to /outside/ or /inside/ is seen by the app
server as a call to /, and the tag library in the JSP selected
to render the content sees that the form which it contains should be
posted to / instead of /outside/ or /inside/ We
need it to go through /outside or /inside to get those needed injected
header parameters.

The struts-config.xml is fairly large and some actions forward to
other actions and to tiles as well.

Is there a way to make Struts aware that the request to / came
from /outside (or /inside) so that when there is a call to the
getActionMappingURL will add back the stripped off part?

Here's the Struts helper method from
org.apache.struts.util.RequestUtils that is used by the proprietary
taglib framework to figure out the URL:

    public static String getActionMappingURL(String action,
PageContext pageContext) {
        HttpServletRequest request = (HttpServletRequest)
        StringBuffer value = new StringBuffer(request.getContextPath
        ModuleConfig config = (ModuleConfig) pageContext.getRequest
        if (config != null)
        String servletMapping = (String) pageContext.getAttribute
("org.apache.struts.action.SERVLET_MAPPING", 4);
        if (servletMapping != null) {
            String queryString = null;
            int question = action.indexOf("?");
            if (question >= 0)
                queryString = action.substring(question);
            String actionMapping = getActionMappingName(action);
            if (servletMapping.startsWith("*.")) {
            } else if (servletMapping.endsWith("/*")) {
servletMapping.length() - 2));
            } else if (servletMapping.equals("/"))
            if (queryString != null)
        } else {
            if (!action.startsWith("/"))
        return value.toString();

Thanks for any help that you can bring,


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