Question

I’m developing a GWT App which generates reports for download. When I launch in Eclipse it has an URL like this:

http://127.0.0.1:8888/MyApp.html

But when I package my app for deployment in a web server (i.e. Tomcat) my URL is like this:

http://localhost:8080/MyApp/MyApp.html

Is there any way to get the app’s base URL? Like http://localhost:8080/MyApp/ in the second case?

Answer 1

The doPost method on RemoteServiceServlet is passed the HttpServletRequest sent by the client. HttpServletRequest has a number of methods available that can construct the base URL of the client’s request. HttpServletRequest.getRequestURL() retrieves the whole URL from the request. If you just want the base URL without the page name, you could instead use a combination of getRemoteHost, getRemotePort, and getServletPath.

Example:

doPost(request, response){
    String baseURL = new StringBuilder();
    baseURL.append(request.getRemoteHost());
    baseURL.append(":");
    baseURL.append(request.getRemotePort());
    baseURL.append(request.getServletPath());
}