Updated admin filter and uses it for the closing index reader API.

Change-Id: I7f7ad4dbb97ae3cfd282fba4a952471878867dcb
diff --git a/core/Changes b/core/Changes
index 771026d..98871bf 100644
--- a/core/Changes
+++ b/core/Changes
@@ -2,6 +2,9 @@
 
 2022-03-03
  - Removed VCLoader.
+2022-03-28
+ - Updated admin filter (admintoken as a form param) and uses 
+   it for the closing index reader API. 
 
 # version 0.65.1
 
diff --git a/core/src/main/java/de/ids_mannheim/korap/exceptions/StatusCodes.java b/core/src/main/java/de/ids_mannheim/korap/exceptions/StatusCodes.java
index 019c988..285485d 100644
--- a/core/src/main/java/de/ids_mannheim/korap/exceptions/StatusCodes.java
+++ b/core/src/main/java/de/ids_mannheim/korap/exceptions/StatusCodes.java
@@ -169,6 +169,7 @@
      * MH: service level messages and callbacks
      */
 
+    @Deprecated
     public static final int INCORRECT_ADMIN_TOKEN = 2000;
     
     public static final int AUTHENTICATION_FAILED = 2001;
diff --git a/core/src/main/java/de/ids_mannheim/korap/service/SearchService.java b/core/src/main/java/de/ids_mannheim/korap/service/SearchService.java
index b1b5575..780ff22 100644
--- a/core/src/main/java/de/ids_mannheim/korap/service/SearchService.java
+++ b/core/src/main/java/de/ids_mannheim/korap/service/SearchService.java
@@ -11,7 +11,6 @@
 import java.util.regex.Pattern;
 
 import javax.annotation.PostConstruct;
-import javax.servlet.ServletContext;
 import javax.ws.rs.core.HttpHeaders;
 import javax.ws.rs.core.MultivaluedMap;
 import javax.ws.rs.core.UriBuilder;
@@ -468,18 +467,8 @@
         return graphDBhandler.getResponse("distCollo", "q", query);
     }
     
-    public void closeIndexReader (String token, ServletContext context)
-            throws KustvaktException {
-
-        if (token != null && !token.isEmpty()
-                && token.equals(context.getInitParameter("adminToken"))) {
-            searchKrill.closeIndexReader();
-//            vcLoader.recachePredefinedVC();
-        }
-        else {
-            throw new KustvaktException(StatusCodes.INCORRECT_ADMIN_TOKEN,
-                    "Admin token is incorrect");
-        }
+    public void closeIndexReader () throws KustvaktException {
+        searchKrill.closeIndexReader();
     }
 
     /**
diff --git a/core/src/main/java/de/ids_mannheim/korap/web/controller/SearchController.java b/core/src/main/java/de/ids_mannheim/korap/web/controller/SearchController.java
index 0f49d48..f19f9c8 100644
--- a/core/src/main/java/de/ids_mannheim/korap/web/controller/SearchController.java
+++ b/core/src/main/java/de/ids_mannheim/korap/web/controller/SearchController.java
@@ -10,7 +10,6 @@
 
 import javax.servlet.ServletContext;
 import javax.servlet.http.HttpServletRequest;
-import javax.ws.rs.FormParam;
 import javax.ws.rs.GET;
 import javax.ws.rs.POST;
 import javax.ws.rs.Path;
@@ -40,6 +39,7 @@
 import de.ids_mannheim.korap.utils.ServiceInfo;
 import de.ids_mannheim.korap.web.KustvaktResponseHandler;
 import de.ids_mannheim.korap.web.filter.APIVersionFilter;
+import de.ids_mannheim.korap.web.filter.AdminFilter;
 import de.ids_mannheim.korap.web.filter.AuthenticationFilter;
 import de.ids_mannheim.korap.web.filter.DemoUserFilter;
 import de.ids_mannheim.korap.web.filter.PiwikFilter;
@@ -101,9 +101,11 @@
     
     @POST
     @Path("{version}/index/close")
-    public Response closeIndexReader (@FormParam("token") String token){
+    // overrides the whole filters
+    @ResourceFilters({APIVersionFilter.class,AdminFilter.class})
+    public Response closeIndexReader (){
         try {
-            searchService.closeIndexReader(token, context);
+            searchService.closeIndexReader();
         }
         catch (KustvaktException e) {
             throw kustvaktResponseHandler.throwit(e);
diff --git a/core/src/main/java/de/ids_mannheim/korap/web/filter/AdminFilter.java b/core/src/main/java/de/ids_mannheim/korap/web/filter/AdminFilter.java
new file mode 100644
index 0000000..dd794b4
--- /dev/null
+++ b/core/src/main/java/de/ids_mannheim/korap/web/filter/AdminFilter.java
@@ -0,0 +1,78 @@
+package de.ids_mannheim.korap.web.filter;
+
+import javax.servlet.ServletContext;
+import javax.ws.rs.core.Context;
+import javax.ws.rs.core.SecurityContext;
+import javax.ws.rs.ext.Provider;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import com.sun.jersey.spi.container.ContainerRequest;
+import com.sun.jersey.spi.container.ContainerRequestFilter;
+import com.sun.jersey.spi.container.ContainerResponseFilter;
+
+import de.ids_mannheim.korap.dao.AdminDao;
+import de.ids_mannheim.korap.exceptions.KustvaktException;
+import de.ids_mannheim.korap.exceptions.StatusCodes;
+import de.ids_mannheim.korap.security.context.TokenContext;
+import de.ids_mannheim.korap.web.KustvaktResponseHandler;
+
+/**
+ * @author hanl, margaretha
+ * 
+ * @see {@link AuthenticationFilter}
+ */
+@Component
+@Provider
+public class AdminFilter extends AuthenticationFilter {
+
+    private @Context ServletContext servletContext;
+    @Autowired
+    private AdminDao adminDao;
+    @Autowired
+    private KustvaktResponseHandler kustvaktResponseHandler;
+
+    @Override
+    public ContainerRequest filter (ContainerRequest request) {
+        ContainerRequest superRequest = super.filter(request);
+        String username = "guest";
+        
+        // legacy support for kustvakt core
+        String adminToken = superRequest.getFormParameters().getFirst("token");
+        if (adminToken != null && !adminToken.isEmpty()) {
+            // startswith token=
+            // adminToken = adminToken.substring(6);
+            if (adminToken
+                    .equals(servletContext.getInitParameter("adminToken"))) {
+                return superRequest;
+            }
+        }
+
+        SecurityContext securityContext = superRequest.getSecurityContext();
+        TokenContext tokenContext = (TokenContext) securityContext
+                .getUserPrincipal();
+        
+        if (tokenContext != null) {
+            username = tokenContext.getUsername();
+            if (adminDao.isAdmin(username)) {
+                return superRequest;
+            }
+        }
+        throw kustvaktResponseHandler.throwit(new KustvaktException(
+                StatusCodes.AUTHORIZATION_FAILED,
+                "Unauthorized operation for user: " + username, username));
+    }
+
+
+    @Override
+    public ContainerRequestFilter getRequestFilter () {
+        return this;
+    }
+
+
+    @Override
+    public ContainerResponseFilter getResponseFilter () {
+        return null;
+    }
+}