How to determine request scheme, contextpath if tomcat server is running behind reverse proxy

Question

I am building a plugin for a web application in java which is running on Tomcat and behind a apache reverse proxy server.

I am able to get the following:

Host Name : request.getLocalName()

Port: request.getLocalPort()

How can I get the following for original request, not for proxy request:

Request Scheme : ??

Context Path: ??

Answer 1

To get the authentication scheme used to protect the Servlet you can call from class HttpServletRequest the method getAuthType() . This will return values matching the static finals as specified in the javadocs.

Field Summary:
  static String BASIC_AUTH 
    String identifier for Basic authentication. 
  static String CLIENT_CERT_AUTH 
    String identifier for Client Certificate authentication.
  static String DIGEST_AUTH 
    String identifier for Digest authentication. 
  static String FORM_AUTH 
    String identifier for Form authentication. 

To get the context path you would just call getContextPath() of HttpServletRequest.

EDIT:

To get the local machine name of the server behind the proxy you could get the localhost machine name:

java.net.InetAddress localMachine = java.net.InetAddress.getLocalHost();