Add filter to convert getRequestURL in AuthenticationFilter.

src/main/java/eu/dnetlib/authentication/security/oidc/OpenAIREAuthenticationFilter.java

@@ -6,7 +6,12 @@ import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.mitre.openid.connect.client.OIDCAuthenticationFilter;
 
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
 import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletRequestWrapper;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
 
@@ -20,6 +25,22 @@ public class OpenAIREAuthenticationFilter extends OIDCAuthenticationFilter {
         this.properties = properties;
     }
 
+    @Override
+    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
+        final HttpServletRequestWrapper wrapped = new HttpServletRequestWrapper((HttpServletRequest) req) {
+            @Override
+            public StringBuffer getRequestURL() {
+                final StringBuffer originalUrl = ((HttpServletRequest) getRequest()).getRequestURL();
+                if(originalUrl.toString().contains(OIDCAuthenticationFilter.FILTER_PROCESSES_URL)) {
+                    return new StringBuffer(properties.getOidc().getHome());
+                } else {
+                    return new StringBuffer(properties.getOidc().getRedirect());
+                }
+            }
+        };
+        super.doFilter(wrapped, res, chain);
+    }
+
     @Override
     protected void handleAuthorizationRequest(HttpServletRequest request, HttpServletResponse response) throws IOException {
         Redirect.setRedirect(request, properties);