Package org.apache.wicket.request.handler.resource

Source Code of org.apache.wicket.request.handler.resource.ResourceRequestHandler

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License.  You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.wicket.request.handler.resource;

import org.apache.wicket.Application;
import org.apache.wicket.Session;
import org.apache.wicket.authorization.IAuthorizationStrategy;
import org.apache.wicket.request.IRequestCycle;
import org.apache.wicket.request.IRequestHandler;
import org.apache.wicket.request.mapper.parameter.PageParameters;
import org.apache.wicket.request.resource.IResource;
import org.apache.wicket.settings.DefaultUnauthorizedResourceRequestListener;
import org.apache.wicket.util.lang.Args;

/**
* Request handler that renders a resource.
*
* @author Matej Knopp
*/
public class ResourceRequestHandler implements IRequestHandler
{
  private final IResource resource;
  private final PageParameters parameters;

  /**
   * Construct.
   *
   * @param resource
   * @param parameters
   */
  public ResourceRequestHandler(IResource resource, PageParameters parameters)
  {
    Args.notNull(resource, "resource");

    this.resource = resource;

    this.parameters = parameters != null ? parameters : new PageParameters();

    authorize();
  }

  private void authorize()
  {
    IAuthorizationStrategy authorizationStrategy = null;
    if (Session.exists())
    {
      authorizationStrategy = Session.get().getAuthorizationStrategy();
    }
    else if (Application.exists())
    {
      authorizationStrategy = Application.get().getSecuritySettings().getAuthorizationStrategy();
    }

    if (authorizationStrategy != null && authorizationStrategy.isResourceAuthorized(resource, parameters) == false)
    {
      if (Application.exists())
      {
        Application.get().getSecuritySettings().getUnauthorizedResourceRequestListener().onUnauthorizedRequest(resource, parameters);
      }
      else
      {
        new DefaultUnauthorizedResourceRequestListener().onUnauthorizedRequest(resource, parameters);
      }
    }
  }

  /**
   * @return page parameters
   */
  public PageParameters getPageParameters()
  {
    return parameters;
  }

  /**
   * @return resource
   */
  public IResource getResource()
  {
    return resource;
  }

  /**
   * @see org.apache.wicket.request.IRequestHandler#respond(org.apache.wicket.request.IRequestCycle)
   */
  @Override
  public void respond(final IRequestCycle requestCycle)
  {
    IResource.Attributes a = new IResource.Attributes(requestCycle.getRequest(),
      requestCycle.getResponse(), parameters);
    resource.respond(a);
  }

  /**
   * @see org.apache.wicket.request.IRequestHandler#detach(org.apache.wicket.request.IRequestCycle)
   */
  @Override
  public void detach(IRequestCycle requestCycle)
  {
  }
}
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