/*
    * ====================================================================
    * 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  package org.apache.http.impl.nio;
  
  import java.nio.charset.Charset;
  import java.nio.charset.CharsetDecoder;
  import java.nio.charset.CharsetEncoder;
  import java.nio.charset.CodingErrorAction;
  
  import javax.net.ssl.SSLContext;
  
  import org.apache.http.HttpRequest;
  import org.apache.http.HttpRequestFactory;
  import org.apache.http.annotation.Immutable;
  import org.apache.http.config.ConnectionConfig;
  import org.apache.http.impl.DefaultHttpRequestFactory;
  import org.apache.http.impl.nio.codecs.DefaultHttpRequestParserFactory;
  import org.apache.http.nio.NHttpConnectionFactory;
  import org.apache.http.nio.NHttpMessageParserFactory;
  import org.apache.http.nio.NHttpServerConnection;
  import org.apache.http.nio.reactor.IOSession;
  import org.apache.http.nio.reactor.ssl.SSLIOSession;
  import org.apache.http.nio.reactor.ssl.SSLMode;
  import org.apache.http.nio.reactor.ssl.SSLSetupHandler;
  import org.apache.http.nio.util.ByteBufferAllocator;
  import org.apache.http.nio.util.HeapByteBufferAllocator;
  import org.apache.http.params.HttpParamConfig;
  import org.apache.http.params.HttpParams;
  import org.apache.http.util.Args;
  
  /**
   * Default factory for SSL encrypted, non-blocking {@link NHttpServerConnection}s.
   *
   * @since 4.2
   */
  @SuppressWarnings("deprecation")
  @Immutable
  public class SSLNHttpServerConnectionFactory
      implements NHttpConnectionFactory<DefaultNHttpServerConnection> {
  
      private final NHttpMessageParserFactory<HttpRequest> requestParserFactory;
      private final ByteBufferAllocator allocator;
      private final SSLContext sslcontext;
      private final SSLSetupHandler sslHandler;
      private final ConnectionConfig config;
  
      /**
       * @deprecated (4.3) use {@link
       *   SSLNHttpServerConnectionFactory#SSLNHttpServerConnectionFactory(SSLContext,
       *      SSLSetupHandler, NHttpMessageParserFactory, ByteBufferAllocator, ConnectionConfig)}
       */
      @Deprecated
      public SSLNHttpServerConnectionFactory(
              final SSLContext sslcontext,
              final SSLSetupHandler sslHandler,
              final HttpRequestFactory requestFactory,
              final ByteBufferAllocator allocator,
              final HttpParams params) {
          super();
          Args.notNull(requestFactory, "HTTP request factory");
          Args.notNull(allocator, "Byte buffer allocator");
          Args.notNull(params, "HTTP parameters");
          this.sslcontext = sslcontext;
          this.sslHandler = sslHandler;
          this.allocator = allocator;
          this.requestParserFactory = new DefaultHttpRequestParserFactory(null, requestFactory);
          this.config = HttpParamConfig.getConnectionConfig(params);
      }
  
      /**
       * @deprecated (4.3) use {@link
       *   SSLNHttpServerConnectionFactory#SSLNHttpServerConnectionFactory(SSLContext,
       *     SSLSetupHandler, ConnectionConfig)}
       */
      @Deprecated
     public SSLNHttpServerConnectionFactory(
             final SSLContext sslcontext,
             final SSLSetupHandler sslHandler,
             final HttpParams params) {
         this(sslcontext, sslHandler, DefaultHttpRequestFactory.INSTANCE,
                 HeapByteBufferAllocator.INSTANCE, params);
     }
 
     /**
      * @deprecated (4.3) use {@link
      *   SSLNHttpServerConnectionFactory#SSLNHttpServerConnectionFactory(ConnectionConfig)}
      */
     @Deprecated
     public SSLNHttpServerConnectionFactory(final HttpParams params) {
         this(null, null, params);
     }
 
     /**
      * @since 4.3
      */
     public SSLNHttpServerConnectionFactory(
             final SSLContext sslcontext,
             final SSLSetupHandler sslHandler,
             final NHttpMessageParserFactory<HttpRequest> requestParserFactory,
             final ByteBufferAllocator allocator,
             final ConnectionConfig config) {
         super();
         this.sslcontext = sslcontext;
         this.sslHandler = sslHandler;
         this.allocator = allocator != null ? allocator : HeapByteBufferAllocator.INSTANCE;
         this.requestParserFactory = requestParserFactory != null ? requestParserFactory :
             DefaultHttpRequestParserFactory.INSTANCE;
         this.config = config != null ? config : ConnectionConfig.DEFAULT;
     }
 
     /**
      * @since 4.3
      */
     public SSLNHttpServerConnectionFactory(
             final SSLContext sslcontext,
             final SSLSetupHandler sslHandler,
             final ConnectionConfig config) {
         this(sslcontext, sslHandler, null, null, config);
     }
 
     /**
      * @since 4.3
      */
     public SSLNHttpServerConnectionFactory(final ConnectionConfig config) {
         this(null, null, null, null, config);
     }
 
     private SSLContext getDefaultSSLContext() {
         SSLContext sslcontext;
         try {
             sslcontext = SSLContext.getInstance("TLS");
             sslcontext.init(null, null, null);
         } catch (final Exception ex) {
             throw new IllegalStateException("Failure initializing default SSL context", ex);
         }
         return sslcontext;
     }
 
     /**
      * @deprecated (4.3) no longer used.
      */
     @Deprecated
     protected DefaultNHttpServerConnection createConnection(
             final IOSession session,
             final HttpRequestFactory requestFactory,
             final ByteBufferAllocator allocator,
             final HttpParams params) {
         return new DefaultNHttpServerConnection(session, requestFactory, allocator, params);
     }
 
     /**
      * @since 4.3
      */
     protected SSLIOSession createSSLIOSession(
             final IOSession iosession,
             final SSLContext sslcontext,
             final SSLSetupHandler sslHandler) {
         final SSLIOSession ssliosession = new SSLIOSession(iosession, SSLMode.SERVER,
                 (sslcontext != null ? sslcontext : getDefaultSSLContext()),
                 sslHandler);
         iosession.setAttribute(SSLIOSession.SESSION_KEY, ssliosession);
         return ssliosession;
     }
 
     public DefaultNHttpServerConnection createConnection(final IOSession iosession) {
         final SSLIOSession ssliosession = createSSLIOSession(iosession, this.sslcontext, this.sslHandler);
         CharsetDecoder chardecoder = null;
         CharsetEncoder charencoder = null;
         final Charset charset = this.config.getCharset();
         final CodingErrorAction malformedInputAction = this.config.getMalformedInputAction() != null ?
                 this.config.getMalformedInputAction() : CodingErrorAction.REPORT;
         final CodingErrorAction unmappableInputAction = this.config.getUnmappableInputAction() != null ?
                 this.config.getUnmappableInputAction() : CodingErrorAction.REPORT;
         if (charset != null) {
             chardecoder = charset.newDecoder();
             chardecoder.onMalformedInput(malformedInputAction);
             chardecoder.onUnmappableCharacter(unmappableInputAction);
             charencoder = charset.newEncoder();
             charencoder.onMalformedInput(malformedInputAction);
             charencoder.onUnmappableCharacter(unmappableInputAction);
         }
         return new DefaultNHttpServerConnection(ssliosession,
                 this.config.getBufferSize(),
                 this.config.getFragmentSizeHint(),
                 this.allocator,
                 chardecoder, charencoder, this.config.getMessageConstraints(),
                 null, null,
                 this.requestParserFactory,
                 null);
     }
 
 }