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 /*
  * 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
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 * under the License.
 */
package org.apache.shindig.gadgets;
import  com.google.inject.ImplementedBy;

Interface for locked domain, a security mechanism that ensures that a gadget is always registered on a fixed, unique domain. This prevents attacks from other gadgets that are rendered on the same domain, since all modern web browsers implement a same origin policy that prevents pages served from different hosts from accessing each other's data.
@ImplementedBy(HashLockedDomainService.class)
public interface LockedDomainService {
  

Returns:
True if the host is safe for use with the open proxy.
  boolean isSafeForOpenProxy(String host);

  
Check whether a gadget should be allowed to render on a particular host.

Parameters:
host host name for the content
gadget URL of the gadget
container container
Returns:
true if the gadget can render
  boolean gadgetCanRender(String hostGadget gadgetString container);

  
Calculate the locked domain for a particular gadget on a particular container.

Parameters:
gadget URL of the gadget
container name of the container page
Returns:
the host name on which the gadget should render, or null if locked domain should not be used to render this gadget.
  public String getLockedDomainForGadget(Gadget gadgetString container);
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