HELP: Weblogic Proxy IIS Plugin Path Trim and a WLS81SP2

Discussion in 'Java' started by mollix@gmail.com, Jun 5, 2009.

  1. Guest

    Hi,

    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 http://www.myapp.com/outside/test.do,
    the web server proxies the request to the app. server as /test.do,
    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. "/
    test.do". We can't modify that tag library.

    So, the call to /outside/test.do or /inside/test.do is seen by the app
    server as a call to /test.do, and the tag library in the JSP selected
    to render the content sees that the form which it contains should be
    posted to /test.do instead of /outside/test.do or /inside/test.do. 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 /test.do 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)
    pageContext.getRequest();
    StringBuffer value = new StringBuffer(request.getContextPath
    ());
    ModuleConfig config = (ModuleConfig) pageContext.getRequest
    ().getAttribute("org.apache.struts.action.MODULE");
    if (config != null)
    value.append(config.getPrefix());
    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("*.")) {
    value.append(actionMapping);
    value.append(servletMapping.substring(1));
    } else if (servletMapping.endsWith("/*")) {
    value.append(servletMapping.substring(0,
    servletMapping.length() - 2));
    value.append(actionMapping);
    } else if (servletMapping.equals("/"))
    value.append(actionMapping);
    if (queryString != null)
    value.append(queryString);
    } else {
    if (!action.startsWith("/"))
    value.append("/");
    value.append(action);
    }
    return value.toString();
    }

    Thanks for any help that you can bring,

    Mike.
    , Jun 5, 2009
    #1
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