package org.jboss.resteasy.plugins.providers;

import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Provider;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.Serializable;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import org.jboss.resteasy.resteasy_jaxrs.i18n.LogMessages;


/**
 * MessageBodyReader+Writer for serialized java objects.
 * <p>
 * This Provider has been disabled by default because deserializing java objects from untrusted sources is unsafe.
 * (See http://foxglovesecurity.com/2015/11/06/what-do-weblogic-websphere-jboss-jenkins-opennms-and-your-application-have-in-common-this-vulnerability/
 * or https://access.redhat.com/security/cve/cve-2015-7501). In case your application uses serialized objects and you trust
 * your remote REST partners, then you may enable this provider: <ul>
 *   <li>Either by providing a file &quot;META-INF/services/javax.ws.rs.ext.Providers&quot; with the fully qualified
 *     classname in classpath (See src/main/resources/ for an example. Multiple files in different jars are additive.)</li>
 *   <li>Or register() this Provider at ResteasyProviderFactory or at the jax-rs client.</li>
 * </ul>
 *
 * @author <a href="ron.sigal@jboss.com">Ron Sigal</a>
 * @version $Revision: 1.1 $
 *
 * Created Mar 23, 2012
 */
@Provider
@Produces("application/x-java-serialized-object")
@Consumes("application/x-java-serialized-object")
@Deprecated
public class SerializableProvider implements MessageBodyReader<Serializable>, MessageBodyWriter<Serializable>
{
   public static final MediaType APPLICATION_SERIALIZABLE_TYPE = new MediaType("application", "x-java-serialized-object");
   public static final String APPLICATION_SERIALIZABLE = APPLICATION_SERIALIZABLE_TYPE.toString();

   public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
   {
      return Serializable.class.isAssignableFrom(type)
            && APPLICATION_SERIALIZABLE_TYPE.getType().equals(mediaType.getType())
            && APPLICATION_SERIALIZABLE_TYPE.getSubtype().equals(mediaType.getSubtype());
   }

   public long getSize(Serializable t, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
   {
      return -1;
   }

   public void writeTo(Serializable t, Class<?> type, Type genericType,
         Annotation[] annotations, MediaType mediaType,
         MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream)
         throws IOException, WebApplicationException
   {
      LogMessages.LOGGER.debugf("Provider : %s,  Method : writeTo", getClass().getName());
      BufferedOutputStream bos = new BufferedOutputStream(entityStream);
      ObjectOutputStream oos = new ObjectOutputStream(bos);
      oos.writeObject(t);
      oos.close();
   }

   public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
   {
      return Serializable.class.isAssignableFrom(type)
            && APPLICATION_SERIALIZABLE_TYPE.getType().equals(mediaType.getType())
            && APPLICATION_SERIALIZABLE_TYPE.getSubtype().equals(mediaType.getSubtype());
   }

   public Serializable readFrom(Class<Serializable> type, Type genericType,
         Annotation[] annotations, MediaType mediaType,
         MultivaluedMap<String, String> httpHeaders, InputStream entityStream)
         throws IOException, WebApplicationException
   {
      LogMessages.LOGGER.debugf("Provider : %s,  Method : readFrom", getClass().getName());
      BufferedInputStream bis = new BufferedInputStream(entityStream);
      ObjectInputStream ois = new ObjectInputStream(bis);
      try
      {
         return Serializable.class.cast(ois.readObject());
      }
      catch (ClassNotFoundException e)
      {
         throw new WebApplicationException(e);
      }
   }
}
