Problem and my idea on it is just vague as I'm still in design phase. I just wanted to know something to get a head start on the problem and how/where to proceed to solve it.
Problem Part:
There's one web app built using struts-2 JSP/servlet, with the URL mywebapp.com
.
The requirement is every client can access this mywebapp.com
using their subdomain, like webapp.abc.com,
myapp.xyz.com,
etc. I have to filter based on the domain name to give them a customized login page. I have saved their domain name in the database to map their details that need to be displayed on customized login page.
What I have thought is they will give the IP address of mywebapp.com
to their subdomain registry so it will land on mywebapp.com,
but from here, how can I filter the domain/subdomain for a customized login page?
Any possible way to start on this will be appreciated.
I would suggest using a Filter. With a filter, you can process any requests to your application independent of the controllers.
For instance, if you wanted to redirect to a different page based on subdomain, your filter could manage this, either as a filter that processes before the controller call or after the controller call.
UPDATE: There is more documentation on Struts 2 Interceptors, which can serve a similar purpose: http://java.dzone.com/articles/struts2-tutorial-part-57
String domain = "";
String subdomain = "";
String url = request.getRequestURL();
String[] parts = url.split(".");
// subdomain.domain.com 0, 1, 2
// subdomain1.subdomain2.domain.com 0, 1, 2, 3
domain = (parts.length - 2 > -1) ? parts[1] : parts[];
for(int i = parts.length - 1; i >= 0; i--) {
if(i == parts.length - 2) {
domain = parts[i];
}
if(i == parts.length - 3) {
subdomain = parts[i];
}
}
If you start from the end of the array, you know that the 2nd to last is always the second-level domain (SLD) and the 3rd from last is where the third level subdomains will be.
来源:https://stackoverflow.com/questions/4779021/change-of-index-page-based-on-subdomain-domain-name