content: /*
   * 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.camel.component.http;
  
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  
  import org.apache.camel.Converter;
  import org.apache.camel.Exchange;
  import org.apache.camel.support.ExchangeHelper;
  import org.apache.camel.support.GZIPHelper;
  import org.apache.hc.core5.http.ContentType;
  import org.apache.hc.core5.http.HttpEntity;
  import org.apache.hc.core5.http.io.entity.AbstractHttpEntity;
  import org.apache.hc.core5.http.io.entity.ByteArrayEntity;
  import org.apache.hc.core5.http.io.entity.InputStreamEntity;
  
  /**
   * Some converter methods to make it easier to convert the body to RequestEntity types.
   */
  @Converter(generateLoader = true)
  public final class HttpEntityConverter {
  
      private HttpEntityConverter() {
      }
  
      @Converter
      public static HttpEntity toHttpEntity(byte[] data, Exchange exchange) throws Exception {
          return asHttpEntity(data, exchange);
      }
  
      @Converter
      public static HttpEntity toHttpEntity(InputStream inStream, Exchange exchange) throws Exception {
          return asHttpEntity(inStream, exchange);
      }
  
      @Converter
      public static HttpEntity toHttpEntity(String str, Exchange exchange) throws Exception {
          if (exchange != null && GZIPHelper.isGzip(exchange.getIn())) {
              byte[] data = exchange.getContext().getTypeConverter().convertTo(byte[].class, str);
              return asHttpEntity(data, exchange);
          } else {
              // will use the default StringRequestEntity
              return null;
          }
      }
  
      private static HttpEntity asHttpEntity(InputStream in, Exchange exchange) throws IOException {
          String contentEncoding = null;
          ContentType contentType = null;
          if (exchange != null) {
              contentEncoding = exchange.getIn().getHeader(HttpConstants.CONTENT_ENCODING, String.class);
              contentType = getContentType(exchange, contentType);
          }
  
          InputStreamEntity entity;
          if (exchange != null && !exchange.getProperty(Exchange.SKIP_GZIP_ENCODING, Boolean.FALSE, Boolean.class)) {
              InputStream stream = GZIPHelper.compressGzip(contentEncoding, in);
              int available = stream.available();
              entity = new InputStreamEntity(
                      stream, stream instanceof ByteArrayInputStream ? available != 0 ? available : -1 : -1, contentType,
                      contentEncoding);
          } else {
              entity = new InputStreamEntity(in, -1, contentType, contentEncoding);
          }
  
          return entity;
      }
  
      private static ContentType getContentType(Exchange exchange, ContentType contentType) {
          String contentTypeAsString = ExchangeHelper.getContentType(exchange);
          if (contentTypeAsString != null) {
              contentType = ContentType.parse(contentTypeAsString);
          }
          return contentType;
      }
  
      private static HttpEntity asHttpEntity(byte[] data, Exchange exchange) throws Exception {
          AbstractHttpEntity entity;
  
          String contentEncoding = null;
          ContentType contentType = null;
          if (exchange != null) {
              contentEncoding = exchange.getIn().getHeader(HttpConstants.CONTENT_ENCODING, String.class);
              contentType = getContentType(exchange, contentType);
          }
  
          if (exchange != null && !exchange.getProperty(Exchange.SKIP_GZIP_ENCODING, Boolean.FALSE, Boolean.class)) {
              boolean gzip = GZIPHelper.isGzip(contentEncoding);
              if (gzip) {
                  InputStream stream = GZIPHelper.compressGzip(contentEncoding, data);
                  int available = stream.available();
                  entity = new InputStreamEntity(
                          stream, stream instanceof ByteArrayInputStream
                                  ? available != 0 ? available : -1 : -1,
                          contentType, contentEncoding);
              } else {
                  // use a byte array entity as-is
                  entity = new ByteArrayEntity(data, contentType, contentEncoding);
              }
          } else {
              // create the Repeatable HttpEntity
              entity = new ByteArrayEntity(data, contentType, contentEncoding);
          }
          return entity;
      }
  }
  