/*
    * 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.chemistry.opencmis.client.bindings.spi.webservices;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  
  import javax.net.ssl.HostnameVerifier;
  import javax.net.ssl.SSLSocketFactory;
  import javax.xml.namespace.QName;
  import javax.xml.ws.Binding;
  import javax.xml.ws.BindingProvider;
  import javax.xml.ws.soap.MTOMFeature;
  import javax.xml.ws.soap.SOAPBinding;
  
  import org.apache.chemistry.opencmis.client.bindings.impl.CmisBindingsHelper;
  import org.apache.chemistry.opencmis.client.bindings.spi.BindingSession;
  import org.apache.chemistry.opencmis.commons.SessionParameter;
  import org.apache.chemistry.opencmis.commons.exceptions.CmisBaseException;
  import org.apache.chemistry.opencmis.commons.exceptions.CmisConnectionException;
  import org.apache.chemistry.opencmis.commons.spi.AuthenticationProvider;
  import org.apache.cxf.Bus;
  import org.apache.cxf.configuration.jsse.TLSClientParameters;
  import org.apache.cxf.endpoint.Client;
  import org.apache.cxf.frontend.ClientProxy;
  import org.apache.cxf.headers.Header;
  import org.apache.cxf.transport.http.HTTPConduit;
  import org.apache.cxf.transports.http.configuration.HTTPClientPolicy;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.w3c.dom.Element;
  
  /**
   * Apache CXF JAX-WS implementation.
   */
  public class CXFPortProvider extends AbstractPortProvider {
      private static final Logger LOG = LoggerFactory.getLogger(CXFPortProvider.class);
  
      private int contentThreshold;
      private int responseThreshold;
  
      @Override
      public void setSession(BindingSession session) {
          super.setSession(session);
  
          contentThreshold = session.get(SessionParameter.WEBSERVICES_MEMORY_THRESHOLD, 4 * 1024 * 1024);
          responseThreshold = session.get(SessionParameter.WEBSERVICES_REPSONSE_MEMORY_THRESHOLD, -1);
  
          if (responseThreshold > contentThreshold) {
              contentThreshold = responseThreshold;
          }
      }
  
      /**
       * Creates a port object.
       */
      @Override
      protected BindingProvider createPortObject(CmisServiceHolder serviceHolder) {
          if (LOG.isDebugEnabled()) {
              LOG.debug("Session {}: Creating Web Service port object of {} ...", getSession().getSessionId(),
                      serviceHolder.getServiceName());
          }
  
          try {
              // create port object
              BindingProvider portObject = createPortObjectFromServiceHolder(serviceHolder, new MTOMFeature());
  
              Binding binding = portObject.getBinding();
              ((SOAPBinding) binding).setMTOMEnabled(true);
  
              Client client = ClientProxy.getClient(portObject);
              HTTPConduit http = (HTTPConduit) client.getConduit();
              HTTPClientPolicy httpClientPolicy = new HTTPClientPolicy();
              httpClientPolicy.setAllowChunking(true);
  
              // temp files and large stream handlding
              Bus bus = client.getBus();
  
              Object tempDir = getSession().get(SessionParameter.WEBSERVICES_TEMP_DIRECTORY);
              if (tempDir != null) {
                  bus.setProperty("bus.io.CachedOutputStream.OutputDirectory", tempDir.toString());
              }
 
             if (serviceHolder.getService().handlesContent()) {
                 bus.setProperty("bus.io.CachedOutputStream.Threshold", String.valueOf(contentThreshold));
             } else if (responseThreshold > -1) {
                 bus.setProperty("bus.io.CachedOutputStream.Threshold", String.valueOf(responseThreshold));
             }
 
             bus.setProperty("bus.io.CachedOutputStream.MaxSize", "-1");
 
             if (getSession().get(SessionParameter.WEBSERVICES_TEMP_ENCRYPT, false)) {
                 bus.setProperty("bus.io.CachedOutputStream.CipherTransformation", "AES/CTR/PKCS5Padding");
             }
 
             // add SOAP and HTTP authentication headers
             AuthenticationProvider authProvider = CmisBindingsHelper.getAuthenticationProvider(getSession());
             Map<String, List<String>> httpHeaders = null;
             if (authProvider != null) {
                 // SOAP header
                 Element soapHeader = authProvider.getSOAPHeaders(portObject);
                 if (soapHeader != null) {
                     List<Header> soapHeaderList = new ArrayList<Header>(2);
                     soapHeaderList.add(new Header(new QName(soapHeader.getNamespaceURI(), soapHeader.getLocalName()), soapHeader));
                     portObject.getRequestContext().put(Header.HEADER_LIST, soapHeaderList);
                 }
 
                 // HTTP header
                 String url = (serviceHolder.getEndpointUrl() != null ? serviceHolder.getEndpointUrl().toString()
                         : serviceHolder.getServiceObject().getWSDLDocumentLocation().toString());
                 httpHeaders = authProvider.getHTTPHeaders(url);
 
                 // SSL factory and hostname verifier
                 SSLSocketFactory sslSocketFactory = authProvider.getSSLSocketFactory();
                 HostnameVerifier hostnameVerifier = authProvider.getHostnameVerifier();
                 if (sslSocketFactory != null || hostnameVerifier != null) {
                     TLSClientParameters tlsCP = new TLSClientParameters();
                     if (sslSocketFactory != null) {
                         tlsCP.setSSLSocketFactory(sslSocketFactory);
                     }
                     if (hostnameVerifier != null) {
                         tlsCP.setHostnameVerifier(hostnameVerifier);
                     }
                     http.setTlsClientParameters(tlsCP);
                 }
             }
 
             // set HTTP headers
             setHTTPHeaders(portObject, httpHeaders);
 
             // set endpoint URL
             setEndpointUrl(portObject, serviceHolder.getEndpointUrl());
 
             // timeouts
             int connectTimeout = getSession().get(SessionParameter.CONNECT_TIMEOUT, -1);
             if (connectTimeout >= 0) {
                 httpClientPolicy.setConnectionTimeout(connectTimeout);
             }
 
             int readTimeout = getSession().get(SessionParameter.READ_TIMEOUT, -1);
             if (readTimeout >= 0) {
                 httpClientPolicy.setReceiveTimeout(readTimeout);
             }
 
             http.setClient(httpClientPolicy);
 
             return portObject;
         } catch (CmisBaseException ce) {
             throw ce;
         } catch (Exception e) {
             throw new CmisConnectionException("Cannot initalize Web Services port object: " + e.getMessage(), e);
         }
     }
 }