Question

I made “myproject.com” (for example) to be as “http://localhost:8080/MyProject/” using Nginx’s proxy_pass option. All works ok, but PrimeFaces stylesheets and scripts tries to go to “/MyProject/file”, what isn’t good because of proxing to nonexistent “http://localhost:8080/MyProject/MyProject/file”.
How can I made PF use ./file instead of /MyProject/file? Making Nginx’s location block or link to MyProject folder is bad variant.

Answer 1

Even though I have the strong impression that this problem really needs to be solved in the Ngnix proxy side, I’ll explain how you could “workaround” it from the JSF side on.

JSF resources are represented by the Resource class wherein the getRequestPath() method is responsible for returning the resource URL. You could create a custom Resource implementation wherein the getRequestPath() is implemented/overridden accordingly.

public class MyResource extends ResourceWrapper {

    private Resource wrapped;

    public MyResource(Resource wrapped) {
        this.wrapped = wrapped; 
    }

    @Override
    public String getRequestPath() {
        String contextPath = FacesContext.getCurrentInstance().getExternalContext().getRequestContextPath();
        return "." + wrapped.getRequestPath().substring(contextPath.length());
    }

    @Override
    public Resource getWrapped() {
        return wrapped;
    }

}

Now, to override the default JSF Resource by this custom implementation, you need to create a custom ResourceHandler implementation wherein you return the custom Resource implementation instead in the createResource() method.

public class MyResourceHandler extends ResourceHandlerWrapper {

    private ResourceHandler wrapped;

    public MyResourceHandler(ResourceHandler wrapped) {
        this.wrapped = wrapped;
    }

    @Override
    public Resource createResource(String resourceName, String libraryName) {
        return new MyResource(wrapped.createResource(resourceName, libraryName));
    }

    @Override
    public ResourceHandler getWrapped() {
        return wrapped;
    }

}

Finally, to get it to run, register it as <resource-handler> in the faces-config.xml.

<application>
    <resource-handler>com.example.MyResourceHandler</resource-handler>
</application>